diff --git a/library/ssl_tls13_server.c b/library/ssl_tls13_server.c
index 6caae89..721ade3 100644
--- a/library/ssl_tls13_server.c
+++ b/library/ssl_tls13_server.c
@@ -15,7 +15,7 @@
  *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
-*/
+ */
 
 #include "common.h"
 
@@ -42,21 +42,21 @@
 
 
 static const mbedtls_ssl_ciphersuite_t *ssl_tls13_validate_peer_ciphersuite(
-                                      mbedtls_ssl_context *ssl,
-                                      unsigned int cipher_suite )
+    mbedtls_ssl_context *ssl,
+    unsigned int cipher_suite)
 {
     const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
-    if( ! mbedtls_ssl_tls13_cipher_suite_is_offered( ssl, cipher_suite ) )
-        return( NULL );
-
-    ciphersuite_info = mbedtls_ssl_ciphersuite_from_id( cipher_suite );
-    if( ( mbedtls_ssl_validate_ciphersuite( ssl, ciphersuite_info,
-                                            ssl->tls_version,
-                                            ssl->tls_version ) != 0 ) )
-    {
-        return( NULL );
+    if (!mbedtls_ssl_tls13_cipher_suite_is_offered(ssl, cipher_suite)) {
+        return NULL;
     }
-    return( ciphersuite_info );
+
+    ciphersuite_info = mbedtls_ssl_ciphersuite_from_id(cipher_suite);
+    if ((mbedtls_ssl_validate_ciphersuite(ssl, ciphersuite_info,
+                                          ssl->tls_version,
+                                          ssl->tls_version) != 0)) {
+        return NULL;
+    }
+    return ciphersuite_info;
 }
 
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_SOME_PSK_ENABLED)
@@ -68,49 +68,46 @@
  *   } PskKeyExchangeModes;
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_parse_key_exchange_modes_ext( mbedtls_ssl_context *ssl,
-                                                   const unsigned char *buf,
-                                                   const unsigned char *end )
+static int ssl_tls13_parse_key_exchange_modes_ext(mbedtls_ssl_context *ssl,
+                                                  const unsigned char *buf,
+                                                  const unsigned char *end)
 {
     const unsigned char *p = buf;
     size_t ke_modes_len;
     int ke_modes = 0;
 
     /* Read ke_modes length (1 Byte) */
-    MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 1 );
+    MBEDTLS_SSL_CHK_BUF_READ_PTR(p, end, 1);
     ke_modes_len = *p++;
     /* Currently, there are only two PSK modes, so even without looking
      * at the content, something's wrong if the list has more than 2 items. */
-    if( ke_modes_len > 2 )
-    {
-        MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER,
-                                      MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
-        return( MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
+    if (ke_modes_len > 2) {
+        MBEDTLS_SSL_PEND_FATAL_ALERT(MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER,
+                                     MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER);
+        return MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE;
     }
 
-    MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, ke_modes_len );
+    MBEDTLS_SSL_CHK_BUF_READ_PTR(p, end, ke_modes_len);
 
-    while( ke_modes_len-- != 0 )
-    {
-        switch( *p++ )
-        {
-        case MBEDTLS_SSL_TLS1_3_PSK_MODE_PURE:
-            ke_modes |= MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK;
-            MBEDTLS_SSL_DEBUG_MSG( 3, ( "Found PSK KEX MODE" ) );
-            break;
-        case MBEDTLS_SSL_TLS1_3_PSK_MODE_ECDHE:
-            ke_modes |= MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK_EPHEMERAL;
-            MBEDTLS_SSL_DEBUG_MSG( 3, ( "Found PSK_EPHEMERAL KEX MODE" ) );
-            break;
-        default:
-            MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER,
-                                          MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
-            return( MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
+    while (ke_modes_len-- != 0) {
+        switch (*p++) {
+            case MBEDTLS_SSL_TLS1_3_PSK_MODE_PURE:
+                ke_modes |= MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK;
+                MBEDTLS_SSL_DEBUG_MSG(3, ("Found PSK KEX MODE"));
+                break;
+            case MBEDTLS_SSL_TLS1_3_PSK_MODE_ECDHE:
+                ke_modes |= MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK_EPHEMERAL;
+                MBEDTLS_SSL_DEBUG_MSG(3, ("Found PSK_EPHEMERAL KEX MODE"));
+                break;
+            default:
+                MBEDTLS_SSL_PEND_FATAL_ALERT(MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER,
+                                             MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER);
+                return MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER;
         }
     }
 
     ssl->handshake->tls13_kex_modes = ke_modes;
-    return( 0 );
+    return 0;
 }
 
 #define SSL_TLS1_3_OFFERED_PSK_NOT_MATCH   1
@@ -120,11 +117,11 @@
 
 MBEDTLS_CHECK_RETURN_CRITICAL
 static int ssl_tls13_offered_psks_check_identity_match_ticket(
-                                            mbedtls_ssl_context *ssl,
-                                            const unsigned char *identity,
-                                            size_t identity_len,
-                                            uint32_t obfuscated_ticket_age,
-                                            mbedtls_ssl_session *session )
+    mbedtls_ssl_context *ssl,
+    const unsigned char *identity,
+    size_t identity_len,
+    uint32_t obfuscated_ticket_age,
+    mbedtls_ssl_session *session)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *ticket_buffer;
@@ -136,57 +133,57 @@
 
     ((void) obfuscated_ticket_age);
 
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> check_identity_match_ticket" ) );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("=> check_identity_match_ticket"));
 
     /* Ticket parser is not configured, Skip */
-    if( ssl->conf->f_ticket_parse == NULL || identity_len == 0 )
-        return( 0 );
+    if (ssl->conf->f_ticket_parse == NULL || identity_len == 0) {
+        return 0;
+    }
 
     /* We create a copy of the encrypted ticket since the ticket parsing
      * function is allowed to use its input buffer as an output buffer
      * (in-place decryption). We do, however, need the original buffer for
      * computing the PSK binder value.
      */
-    ticket_buffer = mbedtls_calloc( 1, identity_len );
-    if( ticket_buffer == NULL )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
-        return ( MBEDTLS_ERR_SSL_ALLOC_FAILED );
+    ticket_buffer = mbedtls_calloc(1, identity_len);
+    if (ticket_buffer == NULL) {
+        MBEDTLS_SSL_DEBUG_MSG(1, ("buffer too small"));
+        return MBEDTLS_ERR_SSL_ALLOC_FAILED;
     }
-    memcpy( ticket_buffer, identity, identity_len );
+    memcpy(ticket_buffer, identity, identity_len);
 
-    if( ( ret = ssl->conf->f_ticket_parse( ssl->conf->p_ticket,
-                                           session,
-                                           ticket_buffer, identity_len ) ) != 0 )
-    {
-        if( ret == MBEDTLS_ERR_SSL_INVALID_MAC )
-            MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket is not authentic" ) );
-        else if( ret == MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED )
-            MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket is expired" ) );
-        else
-            MBEDTLS_SSL_DEBUG_RET( 1, "ticket_parse", ret );
+    if ((ret = ssl->conf->f_ticket_parse(ssl->conf->p_ticket,
+                                         session,
+                                         ticket_buffer, identity_len)) != 0) {
+        if (ret == MBEDTLS_ERR_SSL_INVALID_MAC) {
+            MBEDTLS_SSL_DEBUG_MSG(3, ("ticket is not authentic"));
+        } else if (ret == MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED) {
+            MBEDTLS_SSL_DEBUG_MSG(3, ("ticket is expired"));
+        } else {
+            MBEDTLS_SSL_DEBUG_RET(1, "ticket_parse", ret);
+        }
     }
 
     /* We delete the temporary buffer */
-    mbedtls_free( ticket_buffer );
+    mbedtls_free(ticket_buffer);
 
-    if( ret != 0 )
-        goto exit;
-
-    ret = MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED;
-#if defined(MBEDTLS_HAVE_TIME)
-    now = mbedtls_time( NULL );
-
-    if( now < session->start )
-    {
-        MBEDTLS_SSL_DEBUG_MSG(
-            3, ( "Invalid ticket start time ( now=%" MBEDTLS_PRINTF_LONGLONG
-                     ", start=%" MBEDTLS_PRINTF_LONGLONG " )",
-                 (long long)now, (long long)session->start ) );
+    if (ret != 0) {
         goto exit;
     }
 
-    age_in_s = (uint64_t)( now - session->start );
+    ret = MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED;
+#if defined(MBEDTLS_HAVE_TIME)
+    now = mbedtls_time(NULL);
+
+    if (now < session->start) {
+        MBEDTLS_SSL_DEBUG_MSG(
+            3, ("Invalid ticket start time ( now=%" MBEDTLS_PRINTF_LONGLONG
+                ", start=%" MBEDTLS_PRINTF_LONGLONG " )",
+                (long long) now, (long long) session->start));
+        goto exit;
+    }
+
+    age_in_s = (uint64_t) (now - session->start);
 
     /* RFC 8446 section 4.6.1
      *
@@ -199,11 +196,10 @@
      *
      * For time being, the age MUST be less than 604800 seconds (7 days).
      */
-    if( age_in_s > 604800 )
-    {
+    if (age_in_s > 604800) {
         MBEDTLS_SSL_DEBUG_MSG(
-            3, ( "Ticket age exceeds limitation ticket_age=%lu",
-                 (long unsigned int)age_in_s ) );
+            3, ("Ticket age exceeds limitation ticket_age=%lu",
+                (long unsigned int) age_in_s));
         goto exit;
     }
 
@@ -220,13 +216,12 @@
      *       into account.
      */
     age_diff_in_ms = age_in_s * 1000;
-    age_diff_in_ms -= ( obfuscated_ticket_age - session->ticket_age_add );
-    if( age_diff_in_ms <= -1000 ||
-        age_diff_in_ms > MBEDTLS_SSL_TLS1_3_TICKET_AGE_TOLERANCE )
-    {
+    age_diff_in_ms -= (obfuscated_ticket_age - session->ticket_age_add);
+    if (age_diff_in_ms <= -1000 ||
+        age_diff_in_ms > MBEDTLS_SSL_TLS1_3_TICKET_AGE_TOLERANCE) {
         MBEDTLS_SSL_DEBUG_MSG(
-            3, ( "Ticket age outside tolerance window ( diff=%d )",
-                 (int)age_diff_in_ms ) );
+            3, ("Ticket age outside tolerance window ( diff=%d )",
+                (int) age_diff_in_ms));
         goto exit;
     }
 
@@ -235,81 +230,78 @@
 #endif /* MBEDTLS_HAVE_TIME */
 
 exit:
-    if( ret != 0 )
-        mbedtls_ssl_session_free( session );
+    if (ret != 0) {
+        mbedtls_ssl_session_free(session);
+    }
 
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= check_identity_match_ticket" ) );
-    return( ret );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("<= check_identity_match_ticket"));
+    return ret;
 }
 #endif /* MBEDTLS_SSL_SESSION_TICKETS */
 
 MBEDTLS_CHECK_RETURN_CRITICAL
 static int ssl_tls13_offered_psks_check_identity_match(
-               mbedtls_ssl_context *ssl,
-               const unsigned char *identity,
-               size_t identity_len,
-               uint32_t obfuscated_ticket_age,
-               int *psk_type,
-               mbedtls_ssl_session *session )
+    mbedtls_ssl_context *ssl,
+    const unsigned char *identity,
+    size_t identity_len,
+    uint32_t obfuscated_ticket_age,
+    int *psk_type,
+    mbedtls_ssl_session *session)
 {
     ((void) session);
     ((void) obfuscated_ticket_age);
     *psk_type = MBEDTLS_SSL_TLS1_3_PSK_EXTERNAL;
 
-    MBEDTLS_SSL_DEBUG_BUF( 4, "identity", identity, identity_len );
+    MBEDTLS_SSL_DEBUG_BUF(4, "identity", identity, identity_len);
     ssl->handshake->resume = 0;
 
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
-    if( ssl_tls13_offered_psks_check_identity_match_ticket(
+    if (ssl_tls13_offered_psks_check_identity_match_ticket(
             ssl, identity, identity_len, obfuscated_ticket_age,
-            session ) == SSL_TLS1_3_OFFERED_PSK_MATCH )
-    {
+            session) == SSL_TLS1_3_OFFERED_PSK_MATCH) {
         ssl->handshake->resume = 1;
         *psk_type = MBEDTLS_SSL_TLS1_3_PSK_RESUMPTION;
-        mbedtls_ssl_set_hs_psk( ssl,
-                                session->resumption_key,
-                                session->resumption_key_len );
-
-        MBEDTLS_SSL_DEBUG_BUF( 4, "Ticket-resumed PSK:",
+        mbedtls_ssl_set_hs_psk(ssl,
                                session->resumption_key,
-                               session->resumption_key_len );
-        MBEDTLS_SSL_DEBUG_MSG( 4, ( "ticket: obfuscated_ticket_age: %u",
-                                    (unsigned)obfuscated_ticket_age ) );
-        return( SSL_TLS1_3_OFFERED_PSK_MATCH );
+                               session->resumption_key_len);
+
+        MBEDTLS_SSL_DEBUG_BUF(4, "Ticket-resumed PSK:",
+                              session->resumption_key,
+                              session->resumption_key_len);
+        MBEDTLS_SSL_DEBUG_MSG(4, ("ticket: obfuscated_ticket_age: %u",
+                                  (unsigned) obfuscated_ticket_age));
+        return SSL_TLS1_3_OFFERED_PSK_MATCH;
     }
 #endif /* MBEDTLS_SSL_SESSION_TICKETS */
 
     /* Check identity with external configured function */
-    if( ssl->conf->f_psk != NULL )
-    {
-        if( ssl->conf->f_psk(
-                ssl->conf->p_psk, ssl, identity, identity_len ) == 0 )
-        {
-            return( SSL_TLS1_3_OFFERED_PSK_MATCH );
+    if (ssl->conf->f_psk != NULL) {
+        if (ssl->conf->f_psk(
+                ssl->conf->p_psk, ssl, identity, identity_len) == 0) {
+            return SSL_TLS1_3_OFFERED_PSK_MATCH;
         }
-        return( SSL_TLS1_3_OFFERED_PSK_NOT_MATCH );
+        return SSL_TLS1_3_OFFERED_PSK_NOT_MATCH;
     }
 
-    MBEDTLS_SSL_DEBUG_BUF( 5, "identity", identity, identity_len );
+    MBEDTLS_SSL_DEBUG_BUF(5, "identity", identity, identity_len);
     /* Check identity with pre-configured psk */
-    if( ssl->conf->psk_identity != NULL &&
+    if (ssl->conf->psk_identity != NULL &&
         identity_len == ssl->conf->psk_identity_len &&
-        mbedtls_ct_memcmp( ssl->conf->psk_identity,
-                            identity, identity_len ) == 0 )
-    {
-        mbedtls_ssl_set_hs_psk( ssl, ssl->conf->psk, ssl->conf->psk_len );
-        return( SSL_TLS1_3_OFFERED_PSK_MATCH );
+        mbedtls_ct_memcmp(ssl->conf->psk_identity,
+                          identity, identity_len) == 0) {
+        mbedtls_ssl_set_hs_psk(ssl, ssl->conf->psk, ssl->conf->psk_len);
+        return SSL_TLS1_3_OFFERED_PSK_MATCH;
     }
 
-    return( SSL_TLS1_3_OFFERED_PSK_NOT_MATCH );
+    return SSL_TLS1_3_OFFERED_PSK_NOT_MATCH;
 }
 
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_offered_psks_check_binder_match( mbedtls_ssl_context *ssl,
-                                                      const unsigned char *binder,
-                                                      size_t binder_len,
-                                                      int psk_type,
-                                                      psa_algorithm_t psk_hash_alg )
+static int ssl_tls13_offered_psks_check_binder_match(mbedtls_ssl_context *ssl,
+                                                     const unsigned char *binder,
+                                                     size_t binder_len,
+                                                     int psk_type,
+                                                     psa_algorithm_t psk_hash_alg)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
@@ -321,49 +313,49 @@
 
     /* Get current state of handshake transcript. */
     ret = mbedtls_ssl_get_handshake_transcript(
-              ssl, mbedtls_hash_info_md_from_psa( psk_hash_alg ),
-              transcript, sizeof( transcript ), &transcript_len );
-    if( ret != 0 )
-        return( ret );
+        ssl, mbedtls_hash_info_md_from_psa(psk_hash_alg),
+        transcript, sizeof(transcript), &transcript_len);
+    if (ret != 0) {
+        return ret;
+    }
 
-    ret = mbedtls_ssl_tls13_export_handshake_psk( ssl, &psk, &psk_len );
-    if( ret != 0 )
-        return( ret );
+    ret = mbedtls_ssl_tls13_export_handshake_psk(ssl, &psk, &psk_len);
+    if (ret != 0) {
+        return ret;
+    }
 
-    ret = mbedtls_ssl_tls13_create_psk_binder( ssl, psk_hash_alg,
-                                               psk, psk_len, psk_type,
-                                               transcript,
-                                               server_computed_binder );
+    ret = mbedtls_ssl_tls13_create_psk_binder(ssl, psk_hash_alg,
+                                              psk, psk_len, psk_type,
+                                              transcript,
+                                              server_computed_binder);
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    mbedtls_free( (void*)psk );
+    mbedtls_free((void *) psk);
 #endif
-    if( ret != 0 )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 1, ( "PSK binder calculation failed." ) );
-        return( MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
+    if (ret != 0) {
+        MBEDTLS_SSL_DEBUG_MSG(1, ("PSK binder calculation failed."));
+        return MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE;
     }
 
-    MBEDTLS_SSL_DEBUG_BUF( 3, "psk binder ( computed ): ",
-                           server_computed_binder, transcript_len );
-    MBEDTLS_SSL_DEBUG_BUF( 3, "psk binder ( received ): ", binder, binder_len );
+    MBEDTLS_SSL_DEBUG_BUF(3, "psk binder ( computed ): ",
+                          server_computed_binder, transcript_len);
+    MBEDTLS_SSL_DEBUG_BUF(3, "psk binder ( received ): ", binder, binder_len);
 
-    if( mbedtls_ct_memcmp( server_computed_binder, binder, binder_len ) == 0 )
-    {
-        return( SSL_TLS1_3_OFFERED_PSK_MATCH );
+    if (mbedtls_ct_memcmp(server_computed_binder, binder, binder_len) == 0) {
+        return SSL_TLS1_3_OFFERED_PSK_MATCH;
     }
 
-    mbedtls_platform_zeroize( server_computed_binder,
-                              sizeof( server_computed_binder ) );
-    return( SSL_TLS1_3_OFFERED_PSK_NOT_MATCH );
+    mbedtls_platform_zeroize(server_computed_binder,
+                             sizeof(server_computed_binder));
+    return SSL_TLS1_3_OFFERED_PSK_NOT_MATCH;
 }
 
 MBEDTLS_CHECK_RETURN_CRITICAL
 static int ssl_tls13_select_ciphersuite_for_psk(
-               mbedtls_ssl_context *ssl,
-               const unsigned char *cipher_suites,
-               const unsigned char *cipher_suites_end,
-               uint16_t *selected_ciphersuite,
-               const mbedtls_ssl_ciphersuite_t **selected_ciphersuite_info )
+    mbedtls_ssl_context *ssl,
+    const unsigned char *cipher_suites,
+    const unsigned char *cipher_suites_end,
+    uint16_t *selected_ciphersuite,
+    const mbedtls_ssl_ciphersuite_t **selected_ciphersuite_info)
 {
     psa_algorithm_t psk_hash_alg = PSA_ALG_SHA_256;
 
@@ -380,79 +372,80 @@
     /*
      * Search for a matching ciphersuite
      */
-    for ( const unsigned char *p = cipher_suites;
-          p < cipher_suites_end; p += 2 )
-    {
+    for (const unsigned char *p = cipher_suites;
+         p < cipher_suites_end; p += 2) {
         uint16_t cipher_suite;
         const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
 
-        cipher_suite = MBEDTLS_GET_UINT16_BE( p, 0 );
-        ciphersuite_info = ssl_tls13_validate_peer_ciphersuite( ssl,
-                                                                cipher_suite );
-        if( ciphersuite_info == NULL )
+        cipher_suite = MBEDTLS_GET_UINT16_BE(p, 0);
+        ciphersuite_info = ssl_tls13_validate_peer_ciphersuite(ssl,
+                                                               cipher_suite);
+        if (ciphersuite_info == NULL) {
             continue;
+        }
 
         /* MAC of selected ciphersuite MUST be same with PSK binder if exist.
          * Otherwise, client should reject.
          */
-        if( psk_hash_alg == mbedtls_psa_translate_md( ciphersuite_info->mac ) )
-        {
+        if (psk_hash_alg == mbedtls_psa_translate_md(ciphersuite_info->mac)) {
             *selected_ciphersuite = cipher_suite;
             *selected_ciphersuite_info = ciphersuite_info;
-            return( 0 );
+            return 0;
         }
     }
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "No matched ciphersuite" ) );
-    return( MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("No matched ciphersuite"));
+    return MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE;
 }
 
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
 MBEDTLS_CHECK_RETURN_CRITICAL
 static int ssl_tls13_select_ciphersuite_for_resumption(
-               mbedtls_ssl_context *ssl,
-               const unsigned char *cipher_suites,
-               const unsigned char *cipher_suites_end,
-               mbedtls_ssl_session *session,
-               uint16_t *selected_ciphersuite,
-               const mbedtls_ssl_ciphersuite_t **selected_ciphersuite_info )
+    mbedtls_ssl_context *ssl,
+    const unsigned char *cipher_suites,
+    const unsigned char *cipher_suites_end,
+    mbedtls_ssl_session *session,
+    uint16_t *selected_ciphersuite,
+    const mbedtls_ssl_ciphersuite_t **selected_ciphersuite_info)
 {
 
     *selected_ciphersuite = 0;
     *selected_ciphersuite_info = NULL;
-    for( const unsigned char *p = cipher_suites; p < cipher_suites_end; p += 2 )
-    {
-        uint16_t cipher_suite = MBEDTLS_GET_UINT16_BE( p, 0 );
+    for (const unsigned char *p = cipher_suites; p < cipher_suites_end; p += 2) {
+        uint16_t cipher_suite = MBEDTLS_GET_UINT16_BE(p, 0);
         const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
 
-        if( cipher_suite != session->ciphersuite )
+        if (cipher_suite != session->ciphersuite) {
             continue;
+        }
 
-        ciphersuite_info = ssl_tls13_validate_peer_ciphersuite( ssl,
-                                                                cipher_suite );
-        if( ciphersuite_info == NULL )
+        ciphersuite_info = ssl_tls13_validate_peer_ciphersuite(ssl,
+                                                               cipher_suite);
+        if (ciphersuite_info == NULL) {
             continue;
+        }
 
         *selected_ciphersuite = cipher_suite;
         *selected_ciphersuite_info = ciphersuite_info;
 
-        return( 0 );
+        return 0;
     }
 
-    return( MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
+    return MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE;
 }
 
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_session_copy_ticket( mbedtls_ssl_session *dst,
-                                          const mbedtls_ssl_session *src )
+static int ssl_tls13_session_copy_ticket(mbedtls_ssl_session *dst,
+                                         const mbedtls_ssl_session *src)
 {
     dst->ticket_age_add = src->ticket_age_add;
     dst->ticket_flags = src->ticket_flags;
     dst->resumption_key_len = src->resumption_key_len;
-    if( src->resumption_key_len == 0 )
-        return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
-    memcpy( dst->resumption_key, src->resumption_key, src->resumption_key_len );
+    if (src->resumption_key_len == 0) {
+        return MBEDTLS_ERR_SSL_INTERNAL_ERROR;
+    }
+    memcpy(dst->resumption_key, src->resumption_key, src->resumption_key_len);
 
-    return( 0 );
+    return 0;
 }
 #endif /* MBEDTLS_SSL_SESSION_TICKETS */
 
@@ -477,11 +470,11 @@
  *    } PreSharedKeyExtension;
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_parse_pre_shared_key_ext( mbedtls_ssl_context *ssl,
-                                               const unsigned char *pre_shared_key_ext,
-                                               const unsigned char *pre_shared_key_ext_end,
-                                               const unsigned char *ciphersuites,
-                                               const unsigned char *ciphersuites_end )
+static int ssl_tls13_parse_pre_shared_key_ext(mbedtls_ssl_context *ssl,
+                                              const unsigned char *pre_shared_key_ext,
+                                              const unsigned char *pre_shared_key_ext_end,
+                                              const unsigned char *ciphersuites,
+                                              const unsigned char *ciphersuites_end)
 {
     const unsigned char *identities = pre_shared_key_ext;
     const unsigned char *p_identity_len;
@@ -494,35 +487,34 @@
     int matched_identity = -1;
     int identity_id = -1;
 
-    MBEDTLS_SSL_DEBUG_BUF( 3, "pre_shared_key extension",
-                           pre_shared_key_ext,
-                           pre_shared_key_ext_end - pre_shared_key_ext );
+    MBEDTLS_SSL_DEBUG_BUF(3, "pre_shared_key extension",
+                          pre_shared_key_ext,
+                          pre_shared_key_ext_end - pre_shared_key_ext);
 
     /* identities_len       2 bytes
      * identities_data   >= 7 bytes
      */
-    MBEDTLS_SSL_CHK_BUF_READ_PTR( identities, pre_shared_key_ext_end, 7 + 2 );
-    identities_len = MBEDTLS_GET_UINT16_BE( identities, 0 );
+    MBEDTLS_SSL_CHK_BUF_READ_PTR(identities, pre_shared_key_ext_end, 7 + 2);
+    identities_len = MBEDTLS_GET_UINT16_BE(identities, 0);
     p_identity_len = identities + 2;
-    MBEDTLS_SSL_CHK_BUF_READ_PTR( p_identity_len, pre_shared_key_ext_end,
-                                  identities_len );
+    MBEDTLS_SSL_CHK_BUF_READ_PTR(p_identity_len, pre_shared_key_ext_end,
+                                 identities_len);
     identities_end = p_identity_len + identities_len;
 
     /* binders_len     2  bytes
      * binders      >= 33 bytes
      */
     binders = identities_end;
-    MBEDTLS_SSL_CHK_BUF_READ_PTR( binders, pre_shared_key_ext_end, 33 + 2 );
-    binders_len = MBEDTLS_GET_UINT16_BE( binders, 0 );
+    MBEDTLS_SSL_CHK_BUF_READ_PTR(binders, pre_shared_key_ext_end, 33 + 2);
+    binders_len = MBEDTLS_GET_UINT16_BE(binders, 0);
     p_binder_len = binders + 2;
-    MBEDTLS_SSL_CHK_BUF_READ_PTR( p_binder_len, pre_shared_key_ext_end, binders_len );
+    MBEDTLS_SSL_CHK_BUF_READ_PTR(p_binder_len, pre_shared_key_ext_end, binders_len);
     binders_end = p_binder_len + binders_len;
 
-    ssl->handshake->update_checksum( ssl, pre_shared_key_ext,
-                                     identities_end - pre_shared_key_ext );
+    ssl->handshake->update_checksum(ssl, pre_shared_key_ext,
+                                    identities_end - pre_shared_key_ext);
 
-    while( p_identity_len < identities_end && p_binder_len < binders_end )
-    {
+    while (p_identity_len < identities_end && p_binder_len < binders_end) {
         const unsigned char *identity;
         size_t identity_len;
         uint32_t obfuscated_ticket_age;
@@ -534,83 +526,83 @@
         const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
         mbedtls_ssl_session session;
-        mbedtls_ssl_session_init( &session );
+        mbedtls_ssl_session_init(&session);
 #endif
 
-        MBEDTLS_SSL_CHK_BUF_READ_PTR( p_identity_len, identities_end, 2 + 1 + 4 );
-        identity_len = MBEDTLS_GET_UINT16_BE( p_identity_len, 0 );
+        MBEDTLS_SSL_CHK_BUF_READ_PTR(p_identity_len, identities_end, 2 + 1 + 4);
+        identity_len = MBEDTLS_GET_UINT16_BE(p_identity_len, 0);
         identity = p_identity_len + 2;
-        MBEDTLS_SSL_CHK_BUF_READ_PTR( identity, identities_end, identity_len + 4 );
-        obfuscated_ticket_age = MBEDTLS_GET_UINT32_BE( identity , identity_len );
+        MBEDTLS_SSL_CHK_BUF_READ_PTR(identity, identities_end, identity_len + 4);
+        obfuscated_ticket_age = MBEDTLS_GET_UINT32_BE(identity, identity_len);
         p_identity_len += identity_len + 6;
 
-        MBEDTLS_SSL_CHK_BUF_READ_PTR( p_binder_len, binders_end, 1 + 32 );
+        MBEDTLS_SSL_CHK_BUF_READ_PTR(p_binder_len, binders_end, 1 + 32);
         binder_len = *p_binder_len;
         binder = p_binder_len + 1;
-        MBEDTLS_SSL_CHK_BUF_READ_PTR( binder, binders_end, binder_len );
+        MBEDTLS_SSL_CHK_BUF_READ_PTR(binder, binders_end, binder_len);
         p_binder_len += binder_len + 1;
 
         identity_id++;
-        if( matched_identity != -1 )
+        if (matched_identity != -1) {
             continue;
+        }
 
         ret = ssl_tls13_offered_psks_check_identity_match(
-                  ssl, identity, identity_len, obfuscated_ticket_age,
-                  &psk_type, &session );
-        if( ret != SSL_TLS1_3_OFFERED_PSK_MATCH )
+            ssl, identity, identity_len, obfuscated_ticket_age,
+            &psk_type, &session);
+        if (ret != SSL_TLS1_3_OFFERED_PSK_MATCH) {
             continue;
+        }
 
-        MBEDTLS_SSL_DEBUG_MSG( 4, ( "found matched identity" ) );
-        switch( psk_type )
-        {
+        MBEDTLS_SSL_DEBUG_MSG(4, ("found matched identity"));
+        switch (psk_type) {
             case MBEDTLS_SSL_TLS1_3_PSK_EXTERNAL:
                 ret = ssl_tls13_select_ciphersuite_for_psk(
-                            ssl, ciphersuites, ciphersuites_end,
-                            &cipher_suite, &ciphersuite_info );
+                    ssl, ciphersuites, ciphersuites_end,
+                    &cipher_suite, &ciphersuite_info);
                 break;
             case MBEDTLS_SSL_TLS1_3_PSK_RESUMPTION:
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
                 ret = ssl_tls13_select_ciphersuite_for_resumption(
-                            ssl, ciphersuites, ciphersuites_end, &session,
-                            &cipher_suite, &ciphersuite_info );
-                if( ret != 0 )
-                    mbedtls_ssl_session_free( &session );
+                    ssl, ciphersuites, ciphersuites_end, &session,
+                    &cipher_suite, &ciphersuite_info);
+                if (ret != 0) {
+                    mbedtls_ssl_session_free(&session);
+                }
 #else
                 ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
 #endif
                 break;
             default:
-                return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
+                return MBEDTLS_ERR_SSL_INTERNAL_ERROR;
         }
-        if( ret != 0 )
-        {
+        if (ret != 0) {
             /* See below, no cipher_suite available, abort handshake */
             MBEDTLS_SSL_PEND_FATAL_ALERT(
                 MBEDTLS_SSL_ALERT_MSG_DECRYPT_ERROR,
-                MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
+                MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE);
             MBEDTLS_SSL_DEBUG_RET(
-                2, "ssl_tls13_select_ciphersuite", ret );
-            return( ret );
+                2, "ssl_tls13_select_ciphersuite", ret);
+            return ret;
         }
 
         ret = ssl_tls13_offered_psks_check_binder_match(
-                  ssl, binder, binder_len, psk_type,
-                  mbedtls_psa_translate_md( ciphersuite_info->mac ) );
-        if( ret != SSL_TLS1_3_OFFERED_PSK_MATCH )
-        {
+            ssl, binder, binder_len, psk_type,
+            mbedtls_psa_translate_md(ciphersuite_info->mac));
+        if (ret != SSL_TLS1_3_OFFERED_PSK_MATCH) {
             /* For security reasons, the handshake should be aborted when we
              * fail to validate a binder value. See RFC 8446 section 4.2.11.2
              * and appendix E.6. */
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
-            mbedtls_ssl_session_free( &session );
+            mbedtls_ssl_session_free(&session);
 #endif
-            MBEDTLS_SSL_DEBUG_MSG( 3, ( "Invalid binder." ) );
-            MBEDTLS_SSL_DEBUG_RET( 1,
-                "ssl_tls13_offered_psks_check_binder_match" , ret );
+            MBEDTLS_SSL_DEBUG_MSG(3, ("Invalid binder."));
+            MBEDTLS_SSL_DEBUG_RET(1,
+                                  "ssl_tls13_offered_psks_check_binder_match", ret);
             MBEDTLS_SSL_PEND_FATAL_ALERT(
                 MBEDTLS_SSL_ALERT_MSG_DECRYPT_ERROR,
-                MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
-            return( ret );
+                MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE);
+            return ret;
         }
 
         matched_identity = identity_id;
@@ -618,42 +610,40 @@
         /* Update handshake parameters */
         ssl->handshake->ciphersuite_info = ciphersuite_info;
         ssl->session_negotiate->ciphersuite = cipher_suite;
-        MBEDTLS_SSL_DEBUG_MSG( 2, ( "overwrite ciphersuite: %04x - %s",
-                                    cipher_suite, ciphersuite_info->name ) );
+        MBEDTLS_SSL_DEBUG_MSG(2, ("overwrite ciphersuite: %04x - %s",
+                                  cipher_suite, ciphersuite_info->name));
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
-        if( psk_type == MBEDTLS_SSL_TLS1_3_PSK_RESUMPTION )
-        {
-            ret = ssl_tls13_session_copy_ticket( ssl->session_negotiate,
-                                                 &session );
-            mbedtls_ssl_session_free( &session );
-            if( ret != 0 )
-                return( ret );
+        if (psk_type == MBEDTLS_SSL_TLS1_3_PSK_RESUMPTION) {
+            ret = ssl_tls13_session_copy_ticket(ssl->session_negotiate,
+                                                &session);
+            mbedtls_ssl_session_free(&session);
+            if (ret != 0) {
+                return ret;
+            }
         }
 #endif /* MBEDTLS_SSL_SESSION_TICKETS */
     }
 
-    if( p_identity_len != identities_end || p_binder_len != binders_end )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 3, ( "pre_shared_key extension decode error" ) );
-        MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR,
-                                      MBEDTLS_ERR_SSL_DECODE_ERROR );
-        return( MBEDTLS_ERR_SSL_DECODE_ERROR );
+    if (p_identity_len != identities_end || p_binder_len != binders_end) {
+        MBEDTLS_SSL_DEBUG_MSG(3, ("pre_shared_key extension decode error"));
+        MBEDTLS_SSL_PEND_FATAL_ALERT(MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR,
+                                     MBEDTLS_ERR_SSL_DECODE_ERROR);
+        return MBEDTLS_ERR_SSL_DECODE_ERROR;
     }
 
     /* Update the handshake transcript with the binder list. */
-    ssl->handshake->update_checksum( ssl,
-                                     identities_end,
-                                     (size_t)( binders_end - identities_end ) );
-    if( matched_identity == -1 )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 3, ( "No matched PSK or ticket." ) );
-        return( MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY );
+    ssl->handshake->update_checksum(ssl,
+                                    identities_end,
+                                    (size_t) (binders_end - identities_end));
+    if (matched_identity == -1) {
+        MBEDTLS_SSL_DEBUG_MSG(3, ("No matched PSK or ticket."));
+        return MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY;
     }
 
-    ssl->handshake->selected_identity = (uint16_t)matched_identity;
-    MBEDTLS_SSL_DEBUG_MSG( 3, ( "Pre shared key found" ) );
+    ssl->handshake->selected_identity = (uint16_t) matched_identity;
+    MBEDTLS_SSL_DEBUG_MSG(3, ("Pre shared key found"));
 
-    return( 0 );
+    return 0;
 }
 
 /*
@@ -665,44 +655,43 @@
  *   }
  * } PreSharedKeyExtension;
  */
-static int ssl_tls13_write_server_pre_shared_key_ext( mbedtls_ssl_context *ssl,
-                                                      unsigned char *buf,
-                                                      unsigned char *end,
-                                                      size_t *olen )
+static int ssl_tls13_write_server_pre_shared_key_ext(mbedtls_ssl_context *ssl,
+                                                     unsigned char *buf,
+                                                     unsigned char *end,
+                                                     size_t *olen)
 {
-    unsigned char *p = (unsigned char*)buf;
+    unsigned char *p = (unsigned char *) buf;
 
     *olen = 0;
 
     int not_using_psk = 0;
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    not_using_psk = ( mbedtls_svc_key_id_is_null( ssl->handshake->psk_opaque ) );
+    not_using_psk = (mbedtls_svc_key_id_is_null(ssl->handshake->psk_opaque));
 #else
-    not_using_psk = ( ssl->handshake->psk == NULL );
+    not_using_psk = (ssl->handshake->psk == NULL);
 #endif
-    if( not_using_psk )
-    {
+    if (not_using_psk) {
         /* We shouldn't have called this extension writer unless we've
          * chosen to use a PSK. */
-        return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
+        return MBEDTLS_ERR_SSL_INTERNAL_ERROR;
     }
 
-    MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding pre_shared_key extension" ) );
-    MBEDTLS_SSL_CHK_BUF_PTR( p, end, 6 );
+    MBEDTLS_SSL_DEBUG_MSG(3, ("server hello, adding pre_shared_key extension"));
+    MBEDTLS_SSL_CHK_BUF_PTR(p, end, 6);
 
-    MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_PRE_SHARED_KEY, p, 0 );
-    MBEDTLS_PUT_UINT16_BE( 2, p, 2 );
+    MBEDTLS_PUT_UINT16_BE(MBEDTLS_TLS_EXT_PRE_SHARED_KEY, p, 0);
+    MBEDTLS_PUT_UINT16_BE(2, p, 2);
 
-    MBEDTLS_PUT_UINT16_BE( ssl->handshake->selected_identity, p, 4 );
+    MBEDTLS_PUT_UINT16_BE(ssl->handshake->selected_identity, p, 4);
 
     *olen = 6;
 
-    MBEDTLS_SSL_DEBUG_MSG( 4, ( "sent selected_identity: %u",
-                                ssl->handshake->selected_identity ) );
+    MBEDTLS_SSL_DEBUG_MSG(4, ("sent selected_identity: %u",
+                              ssl->handshake->selected_identity));
 
-    mbedtls_ssl_tls13_set_hs_sent_ext_mask( ssl, MBEDTLS_TLS_EXT_PRE_SHARED_KEY );
+    mbedtls_ssl_tls13_set_hs_sent_ext_mask(ssl, MBEDTLS_TLS_EXT_PRE_SHARED_KEY);
 
-    return( 0 );
+    return 0;
 }
 
 #endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_SOME_PSK_ENABLED */
@@ -713,9 +702,9 @@
  *   } SupportedVersions;
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_parse_supported_versions_ext( mbedtls_ssl_context *ssl,
-                                                   const unsigned char *buf,
-                                                   const unsigned char *end )
+static int ssl_tls13_parse_supported_versions_ext(mbedtls_ssl_context *ssl,
+                                                  const unsigned char *buf,
+                                                  const unsigned char *end)
 {
     const unsigned char *p = buf;
     size_t versions_len;
@@ -723,39 +712,36 @@
     uint16_t tls_version;
     int tls13_supported = 0;
 
-    MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 1 );
+    MBEDTLS_SSL_CHK_BUF_READ_PTR(p, end, 1);
     versions_len = p[0];
     p += 1;
 
-    MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, versions_len );
+    MBEDTLS_SSL_CHK_BUF_READ_PTR(p, end, versions_len);
     versions_end = p + versions_len;
-    while( p < versions_end )
-    {
-        MBEDTLS_SSL_CHK_BUF_READ_PTR( p, versions_end, 2 );
-        tls_version = mbedtls_ssl_read_version( p, ssl->conf->transport );
+    while (p < versions_end) {
+        MBEDTLS_SSL_CHK_BUF_READ_PTR(p, versions_end, 2);
+        tls_version = mbedtls_ssl_read_version(p, ssl->conf->transport);
         p += 2;
 
         /* In this implementation we only support TLS 1.3 and DTLS 1.3. */
-        if( tls_version == MBEDTLS_SSL_VERSION_TLS1_3 )
-        {
+        if (tls_version == MBEDTLS_SSL_VERSION_TLS1_3) {
             tls13_supported = 1;
             break;
         }
     }
 
-    if( !tls13_supported )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 1, ( "TLS 1.3 is not supported by the client" ) );
+    if (!tls13_supported) {
+        MBEDTLS_SSL_DEBUG_MSG(1, ("TLS 1.3 is not supported by the client"));
 
-        MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION,
-                                      MBEDTLS_ERR_SSL_BAD_PROTOCOL_VERSION );
-        return( MBEDTLS_ERR_SSL_BAD_PROTOCOL_VERSION );
+        MBEDTLS_SSL_PEND_FATAL_ALERT(MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION,
+                                     MBEDTLS_ERR_SSL_BAD_PROTOCOL_VERSION);
+        return MBEDTLS_ERR_SSL_BAD_PROTOCOL_VERSION;
     }
 
-    MBEDTLS_SSL_DEBUG_MSG( 1, ( "Negotiated version. Supported is [%04x]",
-                              (unsigned int)tls_version ) );
+    MBEDTLS_SSL_DEBUG_MSG(1, ("Negotiated version. Supported is [%04x]",
+                              (unsigned int) tls_version));
 
-    return( 0 );
+    return 0;
 }
 
 #if defined(MBEDTLS_ECDH_C)
@@ -770,50 +756,48 @@
  *   } NamedGroupList;
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_parse_supported_groups_ext( mbedtls_ssl_context *ssl,
-                                                 const unsigned char *buf,
-                                                 const unsigned char *end )
+static int ssl_tls13_parse_supported_groups_ext(mbedtls_ssl_context *ssl,
+                                                const unsigned char *buf,
+                                                const unsigned char *end)
 {
     const unsigned char *p = buf;
     size_t named_group_list_len;
     const unsigned char *named_group_list_end;
 
-    MBEDTLS_SSL_DEBUG_BUF( 3, "supported_groups extension", p, end - buf );
-    MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 2 );
-    named_group_list_len = MBEDTLS_GET_UINT16_BE( p, 0 );
+    MBEDTLS_SSL_DEBUG_BUF(3, "supported_groups extension", p, end - buf);
+    MBEDTLS_SSL_CHK_BUF_READ_PTR(p, end, 2);
+    named_group_list_len = MBEDTLS_GET_UINT16_BE(p, 0);
     p += 2;
-    MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, named_group_list_len );
+    MBEDTLS_SSL_CHK_BUF_READ_PTR(p, end, named_group_list_len);
     named_group_list_end = p + named_group_list_len;
     ssl->handshake->hrr_selected_group = 0;
 
-    while( p < named_group_list_end )
-    {
+    while (p < named_group_list_end) {
         uint16_t named_group;
-        MBEDTLS_SSL_CHK_BUF_READ_PTR( p, named_group_list_end, 2 );
-        named_group = MBEDTLS_GET_UINT16_BE( p, 0 );
+        MBEDTLS_SSL_CHK_BUF_READ_PTR(p, named_group_list_end, 2);
+        named_group = MBEDTLS_GET_UINT16_BE(p, 0);
         p += 2;
 
-        MBEDTLS_SSL_DEBUG_MSG( 2,
-                               ( "got named group: %s(%04x)",
-                                 mbedtls_ssl_named_group_to_str( named_group ),
-                                 named_group ) );
+        MBEDTLS_SSL_DEBUG_MSG(2,
+                              ("got named group: %s(%04x)",
+                               mbedtls_ssl_named_group_to_str(named_group),
+                               named_group));
 
-        if( ! mbedtls_ssl_named_group_is_offered( ssl, named_group ) ||
-            ! mbedtls_ssl_named_group_is_supported( named_group ) ||
-            ssl->handshake->hrr_selected_group != 0 )
-        {
+        if (!mbedtls_ssl_named_group_is_offered(ssl, named_group) ||
+            !mbedtls_ssl_named_group_is_supported(named_group) ||
+            ssl->handshake->hrr_selected_group != 0) {
             continue;
         }
 
-        MBEDTLS_SSL_DEBUG_MSG( 2,
-                               ( "add named group %s(%04x) into received list.",
-                                 mbedtls_ssl_named_group_to_str( named_group ),
-                                 named_group ) );
+        MBEDTLS_SSL_DEBUG_MSG(2,
+                              ("add named group %s(%04x) into received list.",
+                               mbedtls_ssl_named_group_to_str(named_group),
+                               named_group));
 
         ssl->handshake->hrr_selected_group = named_group;
     }
 
-    return( 0 );
+    return 0;
 
 }
 #endif /* MBEDTLS_ECDH_C */
@@ -833,9 +817,9 @@
  *  - A negative value for fatal errors.
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_parse_key_shares_ext( mbedtls_ssl_context *ssl,
-                                           const unsigned char *buf,
-                                           const unsigned char *end )
+static int ssl_tls13_parse_key_shares_ext(mbedtls_ssl_context *ssl,
+                                          const unsigned char *buf,
+                                          const unsigned char *end)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char const *p = buf;
@@ -850,10 +834,10 @@
      *
      */
 
-    MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 2 );
-    client_shares_len = MBEDTLS_GET_UINT16_BE( p, 0 );
+    MBEDTLS_SSL_CHK_BUF_READ_PTR(p, end, 2);
+    client_shares_len = MBEDTLS_GET_UINT16_BE(p, 0);
     p += 2;
-    MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, client_shares_len );
+    MBEDTLS_SSL_CHK_BUF_READ_PTR(p, end, client_shares_len);
 
     ssl->handshake->offered_group_id = 0;
     client_shares_end = p + client_shares_len;
@@ -864,8 +848,7 @@
      * dismiss it and send a HelloRetryRequest message.
      */
 
-    while( p < client_shares_end )
-    {
+    while (p < client_shares_end) {
         uint16_t group;
         size_t key_exchange_len;
         const unsigned char *key_exchange;
@@ -876,42 +859,39 @@
          *    opaque key_exchange<1..2^16-1>;
          * } KeyShareEntry;
          */
-        MBEDTLS_SSL_CHK_BUF_READ_PTR( p, client_shares_end, 4 );
-        group = MBEDTLS_GET_UINT16_BE( p, 0 );
-        key_exchange_len = MBEDTLS_GET_UINT16_BE( p, 2 );
+        MBEDTLS_SSL_CHK_BUF_READ_PTR(p, client_shares_end, 4);
+        group = MBEDTLS_GET_UINT16_BE(p, 0);
+        key_exchange_len = MBEDTLS_GET_UINT16_BE(p, 2);
         p += 4;
         key_exchange = p;
-        MBEDTLS_SSL_CHK_BUF_READ_PTR( p, client_shares_end, key_exchange_len );
+        MBEDTLS_SSL_CHK_BUF_READ_PTR(p, client_shares_end, key_exchange_len);
         p += key_exchange_len;
 
         /* Continue parsing even if we have already found a match,
          * for input validation purposes.
          */
-        if( ! mbedtls_ssl_named_group_is_offered( ssl, group ) ||
-            ! mbedtls_ssl_named_group_is_supported( group ) ||
-            ssl->handshake->offered_group_id != 0 )
-        {
+        if (!mbedtls_ssl_named_group_is_offered(ssl, group) ||
+            !mbedtls_ssl_named_group_is_supported(group) ||
+            ssl->handshake->offered_group_id != 0) {
             continue;
         }
 
         /*
          * For now, we only support ECDHE groups.
          */
-        if( mbedtls_ssl_tls13_named_group_is_ecdhe( group ) )
-        {
-            MBEDTLS_SSL_DEBUG_MSG( 2, ( "ECDH group: %s (%04x)",
-                                        mbedtls_ssl_named_group_to_str( group ),
-                                        group ) );
+        if (mbedtls_ssl_tls13_named_group_is_ecdhe(group)) {
+            MBEDTLS_SSL_DEBUG_MSG(2, ("ECDH group: %s (%04x)",
+                                      mbedtls_ssl_named_group_to_str(group),
+                                      group));
             ret = mbedtls_ssl_tls13_read_public_ecdhe_share(
-                      ssl, key_exchange - 2, key_exchange_len + 2 );
-            if( ret != 0 )
-                return( ret );
+                ssl, key_exchange - 2, key_exchange_len + 2);
+            if (ret != 0) {
+                return ret;
+            }
 
-        }
-        else
-        {
-            MBEDTLS_SSL_DEBUG_MSG( 4, ( "Unrecognized NamedGroup %u",
-                                        (unsigned) group ) );
+        } else {
+            MBEDTLS_SSL_DEBUG_MSG(4, ("Unrecognized NamedGroup %u",
+                                      (unsigned) group));
             continue;
         }
 
@@ -919,101 +899,100 @@
     }
 
 
-    if( ssl->handshake->offered_group_id == 0 )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 1, ( "no matching key share" ) );
-        return( SSL_TLS1_3_PARSE_KEY_SHARES_EXT_NO_MATCH );
+    if (ssl->handshake->offered_group_id == 0) {
+        MBEDTLS_SSL_DEBUG_MSG(1, ("no matching key share"));
+        return SSL_TLS1_3_PARSE_KEY_SHARES_EXT_NO_MATCH;
     }
-    return( 0 );
+    return 0;
 }
 #endif /* MBEDTLS_ECDH_C */
 
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_client_hello_has_exts( mbedtls_ssl_context *ssl,
-                                            int exts_mask )
+static int ssl_tls13_client_hello_has_exts(mbedtls_ssl_context *ssl,
+                                           int exts_mask)
 {
     int masked = ssl->handshake->received_extensions & exts_mask;
-    return( masked == exts_mask );
+    return masked == exts_mask;
 }
 
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
 MBEDTLS_CHECK_RETURN_CRITICAL
 static int ssl_tls13_client_hello_has_exts_for_ephemeral_key_exchange(
-        mbedtls_ssl_context *ssl )
+    mbedtls_ssl_context *ssl)
 {
-    return( ssl_tls13_client_hello_has_exts(
-                ssl,
-                MBEDTLS_SSL_EXT_MASK( SUPPORTED_GROUPS ) |
-                MBEDTLS_SSL_EXT_MASK( KEY_SHARE )        |
-                MBEDTLS_SSL_EXT_MASK( SIG_ALG ) ) );
+    return ssl_tls13_client_hello_has_exts(
+        ssl,
+        MBEDTLS_SSL_EXT_MASK(SUPPORTED_GROUPS) |
+        MBEDTLS_SSL_EXT_MASK(KEY_SHARE)        |
+        MBEDTLS_SSL_EXT_MASK(SIG_ALG));
 }
 #endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED */
 
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK_ENABLED)
 MBEDTLS_CHECK_RETURN_CRITICAL
 static int ssl_tls13_client_hello_has_exts_for_psk_key_exchange(
-               mbedtls_ssl_context *ssl )
+    mbedtls_ssl_context *ssl)
 {
-    return( ssl_tls13_client_hello_has_exts(
-                ssl,
-                MBEDTLS_SSL_EXT_MASK( PRE_SHARED_KEY )          |
-                MBEDTLS_SSL_EXT_MASK( PSK_KEY_EXCHANGE_MODES ) ) );
+    return ssl_tls13_client_hello_has_exts(
+        ssl,
+        MBEDTLS_SSL_EXT_MASK(PRE_SHARED_KEY)          |
+        MBEDTLS_SSL_EXT_MASK(PSK_KEY_EXCHANGE_MODES));
 }
 #endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK_ENABLED */
 
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK_EPHEMERAL_ENABLED)
 MBEDTLS_CHECK_RETURN_CRITICAL
 static int ssl_tls13_client_hello_has_exts_for_psk_ephemeral_key_exchange(
-               mbedtls_ssl_context *ssl )
+    mbedtls_ssl_context *ssl)
 {
-    return( ssl_tls13_client_hello_has_exts(
-                ssl,
-                MBEDTLS_SSL_EXT_MASK( SUPPORTED_GROUPS )        |
-                MBEDTLS_SSL_EXT_MASK( KEY_SHARE )               |
-                MBEDTLS_SSL_EXT_MASK( PRE_SHARED_KEY )          |
-                MBEDTLS_SSL_EXT_MASK( PSK_KEY_EXCHANGE_MODES ) ) );
+    return ssl_tls13_client_hello_has_exts(
+        ssl,
+        MBEDTLS_SSL_EXT_MASK(SUPPORTED_GROUPS)        |
+        MBEDTLS_SSL_EXT_MASK(KEY_SHARE)               |
+        MBEDTLS_SSL_EXT_MASK(PRE_SHARED_KEY)          |
+        MBEDTLS_SSL_EXT_MASK(PSK_KEY_EXCHANGE_MODES));
 }
 #endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK_EPHEMERAL_ENABLED */
 
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_check_ephemeral_key_exchange( mbedtls_ssl_context *ssl )
+static int ssl_tls13_check_ephemeral_key_exchange(mbedtls_ssl_context *ssl)
 {
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
-    return( mbedtls_ssl_conf_tls13_ephemeral_enabled( ssl ) &&
-            ssl_tls13_client_hello_has_exts_for_ephemeral_key_exchange( ssl ) );
+    return mbedtls_ssl_conf_tls13_ephemeral_enabled(ssl) &&
+           ssl_tls13_client_hello_has_exts_for_ephemeral_key_exchange(ssl);
 #else
     ((void) ssl);
-    return( 0 );
+    return 0;
 #endif
 }
 
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_check_psk_key_exchange( mbedtls_ssl_context *ssl )
+static int ssl_tls13_check_psk_key_exchange(mbedtls_ssl_context *ssl)
 {
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK_ENABLED)
-    return( mbedtls_ssl_conf_tls13_psk_enabled( ssl ) &&
-            mbedtls_ssl_tls13_psk_enabled( ssl ) &&
-            ssl_tls13_client_hello_has_exts_for_psk_key_exchange( ssl ) );
+    return mbedtls_ssl_conf_tls13_psk_enabled(ssl) &&
+           mbedtls_ssl_tls13_psk_enabled(ssl) &&
+           ssl_tls13_client_hello_has_exts_for_psk_key_exchange(ssl);
 #else
     ((void) ssl);
-    return( 0 );
+    return 0;
 #endif
 }
 
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_check_psk_ephemeral_key_exchange( mbedtls_ssl_context *ssl )
+static int ssl_tls13_check_psk_ephemeral_key_exchange(mbedtls_ssl_context *ssl)
 {
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK_EPHEMERAL_ENABLED)
-    return( mbedtls_ssl_conf_tls13_psk_ephemeral_enabled( ssl ) &&
-            mbedtls_ssl_tls13_psk_ephemeral_enabled( ssl ) &&
-            ssl_tls13_client_hello_has_exts_for_psk_ephemeral_key_exchange( ssl ) );
+    return mbedtls_ssl_conf_tls13_psk_ephemeral_enabled(ssl) &&
+           mbedtls_ssl_tls13_psk_ephemeral_enabled(ssl) &&
+           ssl_tls13_client_hello_has_exts_for_psk_ephemeral_key_exchange(ssl);
 #else
     ((void) ssl);
-    return( 0 );
+    return 0;
 #endif
 }
 
-static int ssl_tls13_determine_key_exchange_mode( mbedtls_ssl_context *ssl )
+static int ssl_tls13_determine_key_exchange_mode(mbedtls_ssl_context *ssl)
 {
     /*
      * Determine the key exchange algorithm to use.
@@ -1032,37 +1011,30 @@
 
     ssl->handshake->key_exchange_mode = MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_NONE;
 
-    if( ssl_tls13_check_psk_ephemeral_key_exchange( ssl ) )
-    {
+    if (ssl_tls13_check_psk_ephemeral_key_exchange(ssl)) {
         ssl->handshake->key_exchange_mode =
             MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK_EPHEMERAL;
-        MBEDTLS_SSL_DEBUG_MSG( 2, ( "key exchange mode: psk_ephemeral" ) );
-    }
-    else
-    if( ssl_tls13_check_ephemeral_key_exchange( ssl ) )
-    {
+        MBEDTLS_SSL_DEBUG_MSG(2, ("key exchange mode: psk_ephemeral"));
+    } else
+    if (ssl_tls13_check_ephemeral_key_exchange(ssl)) {
         ssl->handshake->key_exchange_mode =
             MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL;
-        MBEDTLS_SSL_DEBUG_MSG( 2, ( "key exchange mode: ephemeral" ) );
-    }
-    else
-    if( ssl_tls13_check_psk_key_exchange( ssl ) )
-    {
+        MBEDTLS_SSL_DEBUG_MSG(2, ("key exchange mode: ephemeral"));
+    } else
+    if (ssl_tls13_check_psk_key_exchange(ssl)) {
         ssl->handshake->key_exchange_mode =
             MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK;
-        MBEDTLS_SSL_DEBUG_MSG( 2, ( "key exchange mode: psk" ) );
-    }
-    else
-    {
+        MBEDTLS_SSL_DEBUG_MSG(2, ("key exchange mode: psk"));
+    } else {
         MBEDTLS_SSL_DEBUG_MSG(
-                1,
-                ( "ClientHello message misses mandatory extensions." ) );
-        MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_MISSING_EXTENSION ,
-                                      MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
-        return( MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
+            1,
+            ("ClientHello message misses mandatory extensions."));
+        MBEDTLS_SSL_PEND_FATAL_ALERT(MBEDTLS_SSL_ALERT_MSG_MISSING_EXTENSION,
+                                     MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER);
+        return MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER;
     }
 
-    return( 0 );
+    return 0;
 
 }
 
@@ -1070,30 +1042,29 @@
     defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-static psa_algorithm_t ssl_tls13_iana_sig_alg_to_psa_alg( uint16_t sig_alg )
+static psa_algorithm_t ssl_tls13_iana_sig_alg_to_psa_alg(uint16_t sig_alg)
 {
-    switch( sig_alg )
-    {
+    switch (sig_alg) {
         case MBEDTLS_TLS1_3_SIG_ECDSA_SECP256R1_SHA256:
-            return( PSA_ALG_ECDSA( PSA_ALG_SHA_256 ) );
+            return PSA_ALG_ECDSA(PSA_ALG_SHA_256);
         case MBEDTLS_TLS1_3_SIG_ECDSA_SECP384R1_SHA384:
-            return( PSA_ALG_ECDSA( PSA_ALG_SHA_384 ) );
+            return PSA_ALG_ECDSA(PSA_ALG_SHA_384);
         case MBEDTLS_TLS1_3_SIG_ECDSA_SECP521R1_SHA512:
-            return( PSA_ALG_ECDSA( PSA_ALG_SHA_512 ) );
+            return PSA_ALG_ECDSA(PSA_ALG_SHA_512);
         case MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA256:
-            return( PSA_ALG_RSA_PSS( PSA_ALG_SHA_256 ) );
+            return PSA_ALG_RSA_PSS(PSA_ALG_SHA_256);
         case MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA384:
-            return( PSA_ALG_RSA_PSS( PSA_ALG_SHA_384 ) );
+            return PSA_ALG_RSA_PSS(PSA_ALG_SHA_384);
         case MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA512:
-            return( PSA_ALG_RSA_PSS( PSA_ALG_SHA_512 ) );
+            return PSA_ALG_RSA_PSS(PSA_ALG_SHA_512);
         case MBEDTLS_TLS1_3_SIG_RSA_PKCS1_SHA256:
-            return( PSA_ALG_RSA_PKCS1V15_SIGN( PSA_ALG_SHA_256 ) );
+            return PSA_ALG_RSA_PKCS1V15_SIGN(PSA_ALG_SHA_256);
         case MBEDTLS_TLS1_3_SIG_RSA_PKCS1_SHA384:
-            return( PSA_ALG_RSA_PKCS1V15_SIGN( PSA_ALG_SHA_384 ) );
+            return PSA_ALG_RSA_PKCS1V15_SIGN(PSA_ALG_SHA_384);
         case MBEDTLS_TLS1_3_SIG_RSA_PKCS1_SHA512:
-            return( PSA_ALG_RSA_PKCS1V15_SIGN( PSA_ALG_SHA_512 ) );
+            return PSA_ALG_RSA_PKCS1V15_SIGN(PSA_ALG_SHA_512);
         default:
-            return( PSA_ALG_NONE );
+            return PSA_ALG_NONE;
     }
 }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
@@ -1103,93 +1074,90 @@
  * algorithms supported by the client.
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_pick_key_cert( mbedtls_ssl_context *ssl )
+static int ssl_tls13_pick_key_cert(mbedtls_ssl_context *ssl)
 {
     mbedtls_ssl_key_cert *key_cert, *key_cert_list;
     const uint16_t *sig_alg = ssl->handshake->received_sig_algs;
 
 #if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
-    if( ssl->handshake->sni_key_cert != NULL )
+    if (ssl->handshake->sni_key_cert != NULL) {
         key_cert_list = ssl->handshake->sni_key_cert;
-    else
+    } else
 #endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
-        key_cert_list = ssl->conf->key_cert;
+    key_cert_list = ssl->conf->key_cert;
 
-    if( key_cert_list == NULL )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 3, ( "server has no certificate" ) );
-        return( -1 );
+    if (key_cert_list == NULL) {
+        MBEDTLS_SSL_DEBUG_MSG(3, ("server has no certificate"));
+        return -1;
     }
 
-    for( ; *sig_alg != MBEDTLS_TLS1_3_SIG_NONE; sig_alg++ )
-    {
-        if( !mbedtls_ssl_sig_alg_is_offered( ssl, *sig_alg ) )
+    for (; *sig_alg != MBEDTLS_TLS1_3_SIG_NONE; sig_alg++) {
+        if (!mbedtls_ssl_sig_alg_is_offered(ssl, *sig_alg)) {
             continue;
+        }
 
-        if( !mbedtls_ssl_tls13_sig_alg_for_cert_verify_is_supported( *sig_alg ) )
+        if (!mbedtls_ssl_tls13_sig_alg_for_cert_verify_is_supported(*sig_alg)) {
             continue;
+        }
 
-        for( key_cert = key_cert_list; key_cert != NULL;
-             key_cert = key_cert->next )
-        {
+        for (key_cert = key_cert_list; key_cert != NULL;
+             key_cert = key_cert->next) {
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
             psa_algorithm_t psa_alg = PSA_ALG_NONE;
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
-            MBEDTLS_SSL_DEBUG_CRT( 3, "certificate (chain) candidate",
-                                   key_cert->cert );
+            MBEDTLS_SSL_DEBUG_CRT(3, "certificate (chain) candidate",
+                                  key_cert->cert);
 
             /*
-            * This avoids sending the client a cert it'll reject based on
-            * keyUsage or other extensions.
-            */
-            if( mbedtls_x509_crt_check_key_usage(
-                    key_cert->cert, MBEDTLS_X509_KU_DIGITAL_SIGNATURE ) != 0 ||
+             * This avoids sending the client a cert it'll reject based on
+             * keyUsage or other extensions.
+             */
+            if (mbedtls_x509_crt_check_key_usage(
+                    key_cert->cert, MBEDTLS_X509_KU_DIGITAL_SIGNATURE) != 0 ||
                 mbedtls_x509_crt_check_extended_key_usage(
                     key_cert->cert, MBEDTLS_OID_SERVER_AUTH,
-                    MBEDTLS_OID_SIZE( MBEDTLS_OID_SERVER_AUTH ) ) != 0 )
-            {
-                MBEDTLS_SSL_DEBUG_MSG( 3, ( "certificate mismatch: "
-                                       "(extended) key usage extension" ) );
+                    MBEDTLS_OID_SIZE(MBEDTLS_OID_SERVER_AUTH)) != 0) {
+                MBEDTLS_SSL_DEBUG_MSG(3, ("certificate mismatch: "
+                                          "(extended) key usage extension"));
                 continue;
             }
 
-            MBEDTLS_SSL_DEBUG_MSG( 3,
-                                   ( "ssl_tls13_pick_key_cert:"
-                                     "check signature algorithm %s [%04x]",
-                                     mbedtls_ssl_sig_alg_to_str( *sig_alg ),
-                                     *sig_alg ) );
+            MBEDTLS_SSL_DEBUG_MSG(3,
+                                  ("ssl_tls13_pick_key_cert:"
+                                   "check signature algorithm %s [%04x]",
+                                   mbedtls_ssl_sig_alg_to_str(*sig_alg),
+                                   *sig_alg));
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-            psa_alg = ssl_tls13_iana_sig_alg_to_psa_alg( *sig_alg );
+            psa_alg = ssl_tls13_iana_sig_alg_to_psa_alg(*sig_alg);
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
-            if( mbedtls_ssl_tls13_check_sig_alg_cert_key_match(
-                                            *sig_alg, &key_cert->cert->pk )
+            if (mbedtls_ssl_tls13_check_sig_alg_cert_key_match(
+                    *sig_alg, &key_cert->cert->pk)
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
                 && psa_alg != PSA_ALG_NONE &&
-                mbedtls_pk_can_do_ext( &key_cert->cert->pk, psa_alg,
-                                       PSA_KEY_USAGE_SIGN_HASH ) == 1
+                mbedtls_pk_can_do_ext(&key_cert->cert->pk, psa_alg,
+                                      PSA_KEY_USAGE_SIGN_HASH) == 1
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
-                )
-            {
+                ) {
                 ssl->handshake->key_cert = key_cert;
-                MBEDTLS_SSL_DEBUG_MSG( 3,
-                                       ( "ssl_tls13_pick_key_cert:"
-                                         "selected signature algorithm"
-                                         " %s [%04x]",
-                                         mbedtls_ssl_sig_alg_to_str( *sig_alg ),
-                                         *sig_alg ) );
+                MBEDTLS_SSL_DEBUG_MSG(3,
+                                      ("ssl_tls13_pick_key_cert:"
+                                       "selected signature algorithm"
+                                       " %s [%04x]",
+                                       mbedtls_ssl_sig_alg_to_str(*sig_alg),
+                                       *sig_alg));
                 MBEDTLS_SSL_DEBUG_CRT(
-                        3, "selected certificate (chain)",
-                        ssl->handshake->key_cert->cert );
-                return( 0 );
+                    3, "selected certificate (chain)",
+                    ssl->handshake->key_cert->cert);
+                return 0;
             }
         }
     }
 
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "ssl_tls13_pick_key_cert:"
-                                "no suitable certificate found" ) );
-    return( -1 );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("ssl_tls13_pick_key_cert:"
+                              "no suitable certificate found"));
+    return -1;
 }
 #endif /* MBEDTLS_X509_CRT_PARSE_C &&
           MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED */
@@ -1239,9 +1207,9 @@
 #define SSL_CLIENT_HELLO_HRR_REQUIRED 1
 
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_parse_client_hello( mbedtls_ssl_context *ssl,
-                                         const unsigned char *buf,
-                                         const unsigned char *end )
+static int ssl_tls13_parse_client_hello(mbedtls_ssl_context *ssl,
+                                        const unsigned char *buf,
+                                        const unsigned char *end)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     const unsigned char *p = buf;
@@ -1278,7 +1246,7 @@
      * 2 + 32 + 1 + 2 + 1 = 38 bytes. Check that first, so that we can
      * read at least up to session id length without worrying.
      */
-    MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 38 );
+    MBEDTLS_SSL_CHK_BUF_READ_PTR(p, end, 38);
 
     /* ...
      * ProtocolVersion legacy_version = 0x0303; // TLS 1.2
@@ -1286,13 +1254,12 @@
      * with ProtocolVersion defined as:
      * uint16 ProtocolVersion;
      */
-    if( mbedtls_ssl_read_version( p, ssl->conf->transport ) !=
-          MBEDTLS_SSL_VERSION_TLS1_2 )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 1, ( "Unsupported version of TLS." ) );
-        MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION,
-                                      MBEDTLS_ERR_SSL_BAD_PROTOCOL_VERSION );
-        return ( MBEDTLS_ERR_SSL_BAD_PROTOCOL_VERSION );
+    if (mbedtls_ssl_read_version(p, ssl->conf->transport) !=
+        MBEDTLS_SSL_VERSION_TLS1_2) {
+        MBEDTLS_SSL_DEBUG_MSG(1, ("Unsupported version of TLS."));
+        MBEDTLS_SSL_PEND_FATAL_ALERT(MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION,
+                                     MBEDTLS_ERR_SSL_BAD_PROTOCOL_VERSION);
+        return MBEDTLS_ERR_SSL_BAD_PROTOCOL_VERSION;
     }
     p += 2;
 
@@ -1313,10 +1280,10 @@
      * with Random defined as:
      * opaque Random[32];
      */
-    MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, random bytes",
-                           p, MBEDTLS_CLIENT_HELLO_RANDOM_LEN );
+    MBEDTLS_SSL_DEBUG_BUF(3, "client hello, random bytes",
+                          p, MBEDTLS_CLIENT_HELLO_RANDOM_LEN);
 
-    memcpy( &handshake->randbytes[0], p, MBEDTLS_CLIENT_HELLO_RANDOM_LEN );
+    memcpy(&handshake->randbytes[0], p, MBEDTLS_CLIENT_HELLO_RANDOM_LEN);
     p += MBEDTLS_CLIENT_HELLO_RANDOM_LEN;
 
     /* ...
@@ -1326,25 +1293,24 @@
     legacy_session_id_len = p[0];
     p++;
 
-    if( legacy_session_id_len > sizeof( ssl->session_negotiate->id ) )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
-        return( MBEDTLS_ERR_SSL_DECODE_ERROR );
+    if (legacy_session_id_len > sizeof(ssl->session_negotiate->id)) {
+        MBEDTLS_SSL_DEBUG_MSG(1, ("bad client hello message"));
+        return MBEDTLS_ERR_SSL_DECODE_ERROR;
     }
 
     ssl->session_negotiate->id_len = legacy_session_id_len;
-    MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, session id",
-                           p, legacy_session_id_len );
+    MBEDTLS_SSL_DEBUG_BUF(3, "client hello, session id",
+                          p, legacy_session_id_len);
     /*
      * Check we have enough data for the legacy session identifier
      * and the ciphersuite list length.
      */
-    MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, legacy_session_id_len + 2 );
+    MBEDTLS_SSL_CHK_BUF_READ_PTR(p, end, legacy_session_id_len + 2);
 
-    memcpy( &ssl->session_negotiate->id[0], p, legacy_session_id_len );
+    memcpy(&ssl->session_negotiate->id[0], p, legacy_session_id_len);
     p += legacy_session_id_len;
 
-    cipher_suites_len = MBEDTLS_GET_UINT16_BE( p, 0 );
+    cipher_suites_len = MBEDTLS_GET_UINT16_BE(p, 0);
     p += 2;
 
     /* Check we have enough data for the ciphersuite list, the legacy
@@ -1354,61 +1320,59 @@
      * legacy_compression_methods                   2 bytes
      * extensions_len                               2 bytes
      */
-    MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, cipher_suites_len + 2 + 2 );
+    MBEDTLS_SSL_CHK_BUF_READ_PTR(p, end, cipher_suites_len + 2 + 2);
 
-   /* ...
-    * CipherSuite cipher_suites<2..2^16-2>;
-    * ...
-    * with CipherSuite defined as:
-    * uint8 CipherSuite[2];
-    */
+    /* ...
+     * CipherSuite cipher_suites<2..2^16-2>;
+     * ...
+     * with CipherSuite defined as:
+     * uint8 CipherSuite[2];
+     */
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_SOME_PSK_ENABLED)
     cipher_suites = p;
 #endif
     cipher_suites_end = p + cipher_suites_len;
-    MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, ciphersuitelist",
-                          p, cipher_suites_len );
+    MBEDTLS_SSL_DEBUG_BUF(3, "client hello, ciphersuitelist",
+                          p, cipher_suites_len);
 
     /*
      * Search for a matching ciphersuite
      */
-    for ( ; p < cipher_suites_end; p += 2 )
-    {
+    for (; p < cipher_suites_end; p += 2) {
         uint16_t cipher_suite;
-        const mbedtls_ssl_ciphersuite_t* ciphersuite_info;
+        const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
 
-        MBEDTLS_SSL_CHK_BUF_READ_PTR( p, cipher_suites_end, 2 );
+        MBEDTLS_SSL_CHK_BUF_READ_PTR(p, cipher_suites_end, 2);
 
-        cipher_suite = MBEDTLS_GET_UINT16_BE( p, 0 );
+        cipher_suite = MBEDTLS_GET_UINT16_BE(p, 0);
         ciphersuite_info = ssl_tls13_validate_peer_ciphersuite(
-                               ssl,cipher_suite );
-        if( ciphersuite_info == NULL )
+            ssl, cipher_suite);
+        if (ciphersuite_info == NULL) {
             continue;
+        }
 
         ssl->session_negotiate->ciphersuite = cipher_suite;
         handshake->ciphersuite_info = ciphersuite_info;
-        MBEDTLS_SSL_DEBUG_MSG( 2, ( "selected ciphersuite: %04x - %s",
-                                    cipher_suite,
-                                    ciphersuite_info->name ) );
+        MBEDTLS_SSL_DEBUG_MSG(2, ("selected ciphersuite: %04x - %s",
+                                  cipher_suite,
+                                  ciphersuite_info->name));
     }
 
-    if( handshake->ciphersuite_info == NULL )
-    {
-        MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE,
-                                      MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
-        return ( MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
+    if (handshake->ciphersuite_info == NULL) {
+        MBEDTLS_SSL_PEND_FATAL_ALERT(MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE,
+                                     MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE);
+        return MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE;
     }
 
     /* ...
      * opaque legacy_compression_methods<1..2^8-1>;
      * ...
      */
-    if( p[0] != 1 || p[1] != MBEDTLS_SSL_COMPRESS_NULL )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad legacy compression method" ) );
-        MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER,
-                                      MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
-        return ( MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
+    if (p[0] != 1 || p[1] != MBEDTLS_SSL_COMPRESS_NULL) {
+        MBEDTLS_SSL_DEBUG_MSG(1, ("bad legacy compression method"));
+        MBEDTLS_SSL_PEND_FATAL_ALERT(MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER,
+                                     MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER);
+        return MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER;
     }
     p += 2;
 
@@ -1421,17 +1385,16 @@
      *    opaque extension_data<0..2^16-1>;
      * } Extension;
      */
-    extensions_len = MBEDTLS_GET_UINT16_BE( p, 0 );
+    extensions_len = MBEDTLS_GET_UINT16_BE(p, 0);
     p += 2;
-    MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, extensions_len );
+    MBEDTLS_SSL_CHK_BUF_READ_PTR(p, end, extensions_len);
     extensions_end = p + extensions_len;
 
-    MBEDTLS_SSL_DEBUG_BUF( 3, "client hello extensions", p, extensions_len );
+    MBEDTLS_SSL_DEBUG_BUF(3, "client hello extensions", p, extensions_len);
 
     handshake->received_extensions = MBEDTLS_SSL_EXT_MASK_NONE;
 
-    while( p < extensions_end )
-    {
+    while (p < extensions_end) {
         unsigned int extension_type;
         size_t extension_data_len;
         const unsigned char *extension_data_end;
@@ -1443,49 +1406,47 @@
          * Servers MUST check that it is the last extension and otherwise fail
          * the handshake with an "illegal_parameter" alert.
          */
-        if( handshake->received_extensions & MBEDTLS_SSL_EXT_MASK( PRE_SHARED_KEY ) )
-        {
+        if (handshake->received_extensions & MBEDTLS_SSL_EXT_MASK(PRE_SHARED_KEY)) {
             MBEDTLS_SSL_DEBUG_MSG(
-                3, ( "pre_shared_key is not last extension." ) );
+                3, ("pre_shared_key is not last extension."));
             MBEDTLS_SSL_PEND_FATAL_ALERT(
                 MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER,
-                MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
-            return( MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
+                MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER);
+            return MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER;
         }
 
-        MBEDTLS_SSL_CHK_BUF_READ_PTR( p, extensions_end, 4 );
-        extension_type = MBEDTLS_GET_UINT16_BE( p, 0 );
-        extension_data_len = MBEDTLS_GET_UINT16_BE( p, 2 );
+        MBEDTLS_SSL_CHK_BUF_READ_PTR(p, extensions_end, 4);
+        extension_type = MBEDTLS_GET_UINT16_BE(p, 0);
+        extension_data_len = MBEDTLS_GET_UINT16_BE(p, 2);
         p += 4;
 
-        MBEDTLS_SSL_CHK_BUF_READ_PTR( p, extensions_end, extension_data_len );
+        MBEDTLS_SSL_CHK_BUF_READ_PTR(p, extensions_end, extension_data_len);
         extension_data_end = p + extension_data_len;
 
         ret = mbedtls_ssl_tls13_check_received_extension(
-                  ssl, MBEDTLS_SSL_HS_CLIENT_HELLO, extension_type,
-                  MBEDTLS_SSL_TLS1_3_ALLOWED_EXTS_OF_CH );
-        if( ret != 0 )
-            return( ret );
+            ssl, MBEDTLS_SSL_HS_CLIENT_HELLO, extension_type,
+            MBEDTLS_SSL_TLS1_3_ALLOWED_EXTS_OF_CH);
+        if (ret != 0) {
+            return ret;
+        }
 
-        switch( extension_type )
-        {
+        switch (extension_type) {
 #if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
             case MBEDTLS_TLS_EXT_SERVERNAME:
-                MBEDTLS_SSL_DEBUG_MSG( 3, ( "found ServerName extension" ) );
-                ret = mbedtls_ssl_parse_server_name_ext( ssl, p,
-                                                         extension_data_end );
-                if( ret != 0 )
-                {
+                MBEDTLS_SSL_DEBUG_MSG(3, ("found ServerName extension"));
+                ret = mbedtls_ssl_parse_server_name_ext(ssl, p,
+                                                        extension_data_end);
+                if (ret != 0) {
                     MBEDTLS_SSL_DEBUG_RET(
-                            1, "mbedtls_ssl_parse_servername_ext", ret );
-                    return( ret );
+                        1, "mbedtls_ssl_parse_servername_ext", ret);
+                    return ret;
                 }
                 break;
 #endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
 
 #if defined(MBEDTLS_ECDH_C)
             case MBEDTLS_TLS_EXT_SUPPORTED_GROUPS:
-                MBEDTLS_SSL_DEBUG_MSG( 3, ( "found supported group extension" ) );
+                MBEDTLS_SSL_DEBUG_MSG(3, ("found supported group extension"));
 
                 /* Supported Groups Extension
                  *
@@ -1494,12 +1455,11 @@
                  * ordered from most preferred to least preferred.
                  */
                 ret = ssl_tls13_parse_supported_groups_ext(
-                          ssl, p, extension_data_end );
-                if( ret != 0 )
-                {
-                    MBEDTLS_SSL_DEBUG_RET( 1,
-                                "mbedtls_ssl_parse_supported_groups_ext", ret );
-                    return( ret );
+                    ssl, p, extension_data_end);
+                if (ret != 0) {
+                    MBEDTLS_SSL_DEBUG_RET(1,
+                                          "mbedtls_ssl_parse_supported_groups_ext", ret);
+                    return ret;
                 }
 
                 break;
@@ -1507,7 +1467,7 @@
 
 #if defined(MBEDTLS_ECDH_C)
             case MBEDTLS_TLS_EXT_KEY_SHARE:
-                MBEDTLS_SSL_DEBUG_MSG( 3, ( "found key share extension" ) );
+                MBEDTLS_SSL_DEBUG_MSG(3, ("found key share extension"));
 
                 /*
                  * Key Share Extension
@@ -1517,61 +1477,56 @@
                  * ECDHE/DHE key establishment methods.
                  */
                 ret = ssl_tls13_parse_key_shares_ext(
-                          ssl, p, extension_data_end );
-                if( ret == SSL_TLS1_3_PARSE_KEY_SHARES_EXT_NO_MATCH )
-                {
-                    MBEDTLS_SSL_DEBUG_MSG( 2, ( "HRR needed " ) );
+                    ssl, p, extension_data_end);
+                if (ret == SSL_TLS1_3_PARSE_KEY_SHARES_EXT_NO_MATCH) {
+                    MBEDTLS_SSL_DEBUG_MSG(2, ("HRR needed "));
                     hrr_required = 1;
                 }
 
-                if( ret < 0 )
-                {
+                if (ret < 0) {
                     MBEDTLS_SSL_DEBUG_RET(
-                        1, "ssl_tls13_parse_key_shares_ext", ret );
-                    return( ret );
+                        1, "ssl_tls13_parse_key_shares_ext", ret);
+                    return ret;
                 }
 
                 break;
 #endif /* MBEDTLS_ECDH_C */
 
             case MBEDTLS_TLS_EXT_SUPPORTED_VERSIONS:
-                MBEDTLS_SSL_DEBUG_MSG( 3, ( "found supported versions extension" ) );
+                MBEDTLS_SSL_DEBUG_MSG(3, ("found supported versions extension"));
 
                 ret = ssl_tls13_parse_supported_versions_ext(
-                          ssl, p, extension_data_end );
-                if( ret != 0 )
-                {
-                    MBEDTLS_SSL_DEBUG_RET( 1,
-                                ( "ssl_tls13_parse_supported_versions_ext" ), ret );
-                    return( ret );
+                    ssl, p, extension_data_end);
+                if (ret != 0) {
+                    MBEDTLS_SSL_DEBUG_RET(1,
+                                          ("ssl_tls13_parse_supported_versions_ext"), ret);
+                    return ret;
                 }
                 break;
 
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_SOME_PSK_ENABLED)
             case MBEDTLS_TLS_EXT_PSK_KEY_EXCHANGE_MODES:
-                MBEDTLS_SSL_DEBUG_MSG( 3, ( "found psk key exchange modes extension" ) );
+                MBEDTLS_SSL_DEBUG_MSG(3, ("found psk key exchange modes extension"));
 
                 ret = ssl_tls13_parse_key_exchange_modes_ext(
-                          ssl, p, extension_data_end );
-                if( ret != 0 )
-                {
+                    ssl, p, extension_data_end);
+                if (ret != 0) {
                     MBEDTLS_SSL_DEBUG_RET(
-                        1, "ssl_tls13_parse_key_exchange_modes_ext", ret );
-                    return( ret );
+                        1, "ssl_tls13_parse_key_exchange_modes_ext", ret);
+                    return ret;
                 }
 
                 break;
 #endif
 
             case MBEDTLS_TLS_EXT_PRE_SHARED_KEY:
-                MBEDTLS_SSL_DEBUG_MSG( 3, ( "found pre_shared_key extension" ) );
-                if( ( handshake->received_extensions &
-                      MBEDTLS_SSL_EXT_MASK( PSK_KEY_EXCHANGE_MODES ) ) == 0 )
-                {
+                MBEDTLS_SSL_DEBUG_MSG(3, ("found pre_shared_key extension"));
+                if ((handshake->received_extensions &
+                     MBEDTLS_SSL_EXT_MASK(PSK_KEY_EXCHANGE_MODES)) == 0) {
                     MBEDTLS_SSL_PEND_FATAL_ALERT(
                         MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER,
-                        MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
-                    return( MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
+                        MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER);
+                    return MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER;
                 }
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_SOME_PSK_ENABLED)
                 /* Delay processing of the PSK identity once we have
@@ -1585,30 +1540,29 @@
 
 #if defined(MBEDTLS_SSL_ALPN)
             case MBEDTLS_TLS_EXT_ALPN:
-                MBEDTLS_SSL_DEBUG_MSG( 3, ( "found alpn extension" ) );
+                MBEDTLS_SSL_DEBUG_MSG(3, ("found alpn extension"));
 
-                ret = mbedtls_ssl_parse_alpn_ext( ssl, p, extension_data_end );
-                if( ret != 0 )
-                {
+                ret = mbedtls_ssl_parse_alpn_ext(ssl, p, extension_data_end);
+                if (ret != 0) {
                     MBEDTLS_SSL_DEBUG_RET(
-                            1, ( "mbedtls_ssl_parse_alpn_ext" ), ret );
-                    return( ret );
+                        1, ("mbedtls_ssl_parse_alpn_ext"), ret);
+                    return ret;
                 }
                 break;
 #endif /* MBEDTLS_SSL_ALPN */
 
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
             case MBEDTLS_TLS_EXT_SIG_ALG:
-                MBEDTLS_SSL_DEBUG_MSG( 3, ( "found signature_algorithms extension" ) );
+                MBEDTLS_SSL_DEBUG_MSG(3, ("found signature_algorithms extension"));
 
                 ret = mbedtls_ssl_parse_sig_alg_ext(
-                          ssl, p, extension_data_end );
-                if( ret != 0 )
-                {
-                    MBEDTLS_SSL_DEBUG_MSG( 1,
-                    ( "ssl_parse_supported_signature_algorithms_server_ext ( %d )",
-                      ret ) );
-                    return( ret );
+                    ssl, p, extension_data_end);
+                if (ret != 0) {
+                    MBEDTLS_SSL_DEBUG_MSG(1,
+                                          (
+                                              "ssl_parse_supported_signature_algorithms_server_ext ( %d )",
+                                              ret));
+                    return ret;
                 }
                 break;
 #endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED */
@@ -1616,19 +1570,19 @@
             default:
                 MBEDTLS_SSL_PRINT_EXT(
                     3, MBEDTLS_SSL_HS_CLIENT_HELLO,
-                    extension_type, "( ignored )" );
+                    extension_type, "( ignored )");
                 break;
         }
 
         p += extension_data_len;
     }
 
-    MBEDTLS_SSL_PRINT_EXTS( 3, MBEDTLS_SSL_HS_CLIENT_HELLO,
-                            handshake->received_extensions );
+    MBEDTLS_SSL_PRINT_EXTS(3, MBEDTLS_SSL_HS_CLIENT_HELLO,
+                           handshake->received_extensions);
 
-    mbedtls_ssl_add_hs_hdr_to_checksum( ssl,
-                                        MBEDTLS_SSL_HS_CLIENT_HELLO,
-                                        p - buf );
+    mbedtls_ssl_add_hs_hdr_to_checksum(ssl,
+                                       MBEDTLS_SSL_HS_CLIENT_HELLO,
+                                       p - buf);
 
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_SOME_PSK_ENABLED)
     /* Update checksum with either
@@ -1636,72 +1590,66 @@
      * - The content up to but excluding the PSK extension, if present.
      */
     /* If we've settled on a PSK-based exchange, parse PSK identity ext */
-    if( mbedtls_ssl_tls13_some_psk_enabled( ssl ) &&
-        mbedtls_ssl_conf_tls13_some_psk_enabled( ssl ) &&
-        ( handshake->received_extensions & MBEDTLS_SSL_EXT_MASK( PRE_SHARED_KEY ) ) )
-    {
-        handshake->update_checksum( ssl, buf,
-                                         pre_shared_key_ext - buf );
-        ret = ssl_tls13_parse_pre_shared_key_ext( ssl,
-                                                  pre_shared_key_ext,
-                                                  pre_shared_key_ext_end,
-                                                  cipher_suites,
-                                                  cipher_suites_end );
-        if( ret == MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY )
-        {
-            handshake->received_extensions &= ~MBEDTLS_SSL_EXT_MASK( PRE_SHARED_KEY );
-        }
-        else if( ret != 0 )
-        {
+    if (mbedtls_ssl_tls13_some_psk_enabled(ssl) &&
+        mbedtls_ssl_conf_tls13_some_psk_enabled(ssl) &&
+        (handshake->received_extensions & MBEDTLS_SSL_EXT_MASK(PRE_SHARED_KEY))) {
+        handshake->update_checksum(ssl, buf,
+                                   pre_shared_key_ext - buf);
+        ret = ssl_tls13_parse_pre_shared_key_ext(ssl,
+                                                 pre_shared_key_ext,
+                                                 pre_shared_key_ext_end,
+                                                 cipher_suites,
+                                                 cipher_suites_end);
+        if (ret == MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY) {
+            handshake->received_extensions &= ~MBEDTLS_SSL_EXT_MASK(PRE_SHARED_KEY);
+        } else if (ret != 0) {
             MBEDTLS_SSL_DEBUG_RET(
-                1, "ssl_tls13_parse_pre_shared_key_ext" , ret );
-            return( ret );
+                1, "ssl_tls13_parse_pre_shared_key_ext", ret);
+            return ret;
         }
-    }
-    else
+    } else
 #endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_SOME_PSK_ENABLED */
     {
-        handshake->update_checksum( ssl, buf, p - buf );
+        handshake->update_checksum(ssl, buf, p - buf);
     }
 
-    ret = ssl_tls13_determine_key_exchange_mode( ssl );
-    if( ret < 0 )
-        return( ret );
+    ret = ssl_tls13_determine_key_exchange_mode(ssl);
+    if (ret < 0) {
+        return ret;
+    }
 
-    mbedtls_ssl_optimize_checksum( ssl, handshake->ciphersuite_info );
+    mbedtls_ssl_optimize_checksum(ssl, handshake->ciphersuite_info);
 
-    return( hrr_required ? SSL_CLIENT_HELLO_HRR_REQUIRED : SSL_CLIENT_HELLO_OK );
+    return hrr_required ? SSL_CLIENT_HELLO_HRR_REQUIRED : SSL_CLIENT_HELLO_OK;
 }
 
 /* Update the handshake state machine */
 
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_postprocess_client_hello( mbedtls_ssl_context* ssl )
+static int ssl_tls13_postprocess_client_hello(mbedtls_ssl_context *ssl)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
     /*
      * Server certificate selection
      */
-    if( ssl->conf->f_cert_cb && ( ret = ssl->conf->f_cert_cb( ssl ) ) != 0 )
-    {
-        MBEDTLS_SSL_DEBUG_RET( 1, "f_cert_cb", ret );
-        return( ret );
+    if (ssl->conf->f_cert_cb && (ret = ssl->conf->f_cert_cb(ssl)) != 0) {
+        MBEDTLS_SSL_DEBUG_RET(1, "f_cert_cb", ret);
+        return ret;
     }
 #if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
     ssl->handshake->sni_name = NULL;
     ssl->handshake->sni_name_len = 0;
 #endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
 
-    ret = mbedtls_ssl_tls13_key_schedule_stage_early( ssl );
-    if( ret != 0 )
-    {
-        MBEDTLS_SSL_DEBUG_RET( 1,
-             "mbedtls_ssl_tls1_3_key_schedule_stage_early", ret );
-        return( ret );
+    ret = mbedtls_ssl_tls13_key_schedule_stage_early(ssl);
+    if (ret != 0) {
+        MBEDTLS_SSL_DEBUG_RET(1,
+                              "mbedtls_ssl_tls1_3_key_schedule_stage_early", ret);
+        return ret;
     }
 
-    return( 0 );
+    return 0;
 
 }
 
@@ -1710,71 +1658,70 @@
  */
 
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_process_client_hello( mbedtls_ssl_context *ssl )
+static int ssl_tls13_process_client_hello(mbedtls_ssl_context *ssl)
 {
 
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-    unsigned char* buf = NULL;
+    unsigned char *buf = NULL;
     size_t buflen = 0;
     int parse_client_hello_ret;
 
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse client hello" ) );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("=> parse client hello"));
 
-    MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_tls13_fetch_handshake_msg(
-                          ssl, MBEDTLS_SSL_HS_CLIENT_HELLO,
-                          &buf, &buflen ) );
+    MBEDTLS_SSL_PROC_CHK(mbedtls_ssl_tls13_fetch_handshake_msg(
+                             ssl, MBEDTLS_SSL_HS_CLIENT_HELLO,
+                             &buf, &buflen));
 
-    MBEDTLS_SSL_PROC_CHK_NEG( ssl_tls13_parse_client_hello( ssl, buf,
-                                                            buf + buflen ) );
+    MBEDTLS_SSL_PROC_CHK_NEG(ssl_tls13_parse_client_hello(ssl, buf,
+                                                          buf + buflen));
     parse_client_hello_ret = ret; /* Store return value of parse_client_hello,
                                    * only SSL_CLIENT_HELLO_OK or
                                    * SSL_CLIENT_HELLO_HRR_REQUIRED at this
                                    * stage as negative error codes are handled
                                    * by MBEDTLS_SSL_PROC_CHK_NEG. */
 
-    MBEDTLS_SSL_PROC_CHK( ssl_tls13_postprocess_client_hello( ssl ) );
+    MBEDTLS_SSL_PROC_CHK(ssl_tls13_postprocess_client_hello(ssl));
 
-    if( parse_client_hello_ret == SSL_CLIENT_HELLO_OK )
-        mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_SERVER_HELLO );
-    else
-        mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_HELLO_RETRY_REQUEST );
+    if (parse_client_hello_ret == SSL_CLIENT_HELLO_OK) {
+        mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_SERVER_HELLO);
+    } else {
+        mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_HELLO_RETRY_REQUEST);
+    }
 
 cleanup:
 
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse client hello" ) );
-    return( ret );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("<= parse client hello"));
+    return ret;
 }
 
 /*
  * Handler for MBEDTLS_SSL_SERVER_HELLO
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_prepare_server_hello( mbedtls_ssl_context *ssl )
+static int ssl_tls13_prepare_server_hello(mbedtls_ssl_context *ssl)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *server_randbytes =
-                    ssl->handshake->randbytes + MBEDTLS_CLIENT_HELLO_RANDOM_LEN;
-    if( ssl->conf->f_rng == NULL )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 1, ( "no RNG provided" ) );
-        return( MBEDTLS_ERR_SSL_NO_RNG );
+        ssl->handshake->randbytes + MBEDTLS_CLIENT_HELLO_RANDOM_LEN;
+    if (ssl->conf->f_rng == NULL) {
+        MBEDTLS_SSL_DEBUG_MSG(1, ("no RNG provided"));
+        return MBEDTLS_ERR_SSL_NO_RNG;
     }
 
-    if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, server_randbytes,
-                                  MBEDTLS_SERVER_HELLO_RANDOM_LEN ) ) != 0 )
-    {
-        MBEDTLS_SSL_DEBUG_RET( 1, "f_rng", ret );
-        return( ret );
+    if ((ret = ssl->conf->f_rng(ssl->conf->p_rng, server_randbytes,
+                                MBEDTLS_SERVER_HELLO_RANDOM_LEN)) != 0) {
+        MBEDTLS_SSL_DEBUG_RET(1, "f_rng", ret);
+        return ret;
     }
 
-    MBEDTLS_SSL_DEBUG_BUF( 3, "server hello, random bytes", server_randbytes,
-                           MBEDTLS_SERVER_HELLO_RANDOM_LEN );
+    MBEDTLS_SSL_DEBUG_BUF(3, "server hello, random bytes", server_randbytes,
+                          MBEDTLS_SERVER_HELLO_RANDOM_LEN);
 
 #if defined(MBEDTLS_HAVE_TIME)
-    ssl->session_negotiate->start = time( NULL );
+    ssl->session_negotiate->start = time(NULL);
 #endif /* MBEDTLS_HAVE_TIME */
 
-    return( ret );
+    return ret;
 }
 
 /*
@@ -1786,39 +1733,39 @@
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
 static int ssl_tls13_write_server_hello_supported_versions_ext(
-                                                mbedtls_ssl_context *ssl,
-                                                unsigned char *buf,
-                                                unsigned char *end,
-                                                size_t *out_len )
+    mbedtls_ssl_context *ssl,
+    unsigned char *buf,
+    unsigned char *end,
+    size_t *out_len)
 {
     *out_len = 0;
 
-    MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, write selected version" ) );
+    MBEDTLS_SSL_DEBUG_MSG(3, ("server hello, write selected version"));
 
     /* Check if we have space to write the extension:
      * - extension_type         (2 bytes)
      * - extension_data_length  (2 bytes)
      * - selected_version       (2 bytes)
      */
-    MBEDTLS_SSL_CHK_BUF_PTR( buf, end, 6 );
+    MBEDTLS_SSL_CHK_BUF_PTR(buf, end, 6);
 
-    MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SUPPORTED_VERSIONS, buf, 0 );
+    MBEDTLS_PUT_UINT16_BE(MBEDTLS_TLS_EXT_SUPPORTED_VERSIONS, buf, 0);
 
-    MBEDTLS_PUT_UINT16_BE( 2, buf, 2 );
+    MBEDTLS_PUT_UINT16_BE(2, buf, 2);
 
-    mbedtls_ssl_write_version( buf + 4,
-                               ssl->conf->transport,
-                               ssl->tls_version );
+    mbedtls_ssl_write_version(buf + 4,
+                              ssl->conf->transport,
+                              ssl->tls_version);
 
-    MBEDTLS_SSL_DEBUG_MSG( 3, ( "supported version: [%04x]",
-                                ssl->tls_version ) );
+    MBEDTLS_SSL_DEBUG_MSG(3, ("supported version: [%04x]",
+                              ssl->tls_version));
 
     *out_len = 6;
 
     mbedtls_ssl_tls13_set_hs_sent_ext_mask(
-        ssl, MBEDTLS_TLS_EXT_SUPPORTED_VERSIONS );
+        ssl, MBEDTLS_TLS_EXT_SUPPORTED_VERSIONS);
 
-    return( 0 );
+    return 0;
 }
 
 
@@ -1826,36 +1773,30 @@
 /* Generate and export a single key share. For hybrid KEMs, this can
  * be called multiple times with the different components of the hybrid. */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_generate_and_write_key_share( mbedtls_ssl_context *ssl,
-                                                   uint16_t named_group,
-                                                   unsigned char *buf,
-                                                   unsigned char *end,
-                                                   size_t *out_len )
+static int ssl_tls13_generate_and_write_key_share(mbedtls_ssl_context *ssl,
+                                                  uint16_t named_group,
+                                                  unsigned char *buf,
+                                                  unsigned char *end,
+                                                  size_t *out_len)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
     *out_len = 0;
 
 #if defined(MBEDTLS_ECDH_C)
-    if( mbedtls_ssl_tls13_named_group_is_ecdhe( named_group ) )
-    {
+    if (mbedtls_ssl_tls13_named_group_is_ecdhe(named_group)) {
         ret = mbedtls_ssl_tls13_generate_and_write_ecdh_key_exchange(
-                                        ssl, named_group, buf, end, out_len );
-        if( ret != 0 )
-        {
+            ssl, named_group, buf, end, out_len);
+        if (ret != 0) {
             MBEDTLS_SSL_DEBUG_RET(
                 1, "mbedtls_ssl_tls13_generate_and_write_ecdh_key_exchange",
-                ret );
-            return( ret );
+                ret);
+            return ret;
         }
-    }
-    else
+    } else
 #endif /* MBEDTLS_ECDH_C */
-    if( 0 /* Other kinds of KEMs */ )
-    {
-    }
-    else
-    {
+    if (0 /* Other kinds of KEMs */) {
+    } else {
         ((void) ssl);
         ((void) named_group);
         ((void) buf);
@@ -1863,7 +1804,7 @@
         ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR;
     }
 
-    return( ret );
+    return ret;
 }
 
 /*
@@ -1880,10 +1821,10 @@
  * } KeyShareServerHello;
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_write_key_share_ext( mbedtls_ssl_context *ssl,
-                                          unsigned char *buf,
-                                          unsigned char *end,
-                                          size_t *out_len )
+static int ssl_tls13_write_key_share_ext(mbedtls_ssl_context *ssl,
+                                         unsigned char *buf,
+                                         unsigned char *end,
+                                         size_t *out_len)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *p = buf;
@@ -1893,11 +1834,11 @@
 
     *out_len = 0;
 
-    MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding key share extension" ) );
+    MBEDTLS_SSL_DEBUG_MSG(3, ("server hello, adding key share extension"));
 
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "server hello, write selected_group: %s (%04x)",
-                                mbedtls_ssl_named_group_to_str( group ),
-                                group ) );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("server hello, write selected_group: %s (%04x)",
+                              mbedtls_ssl_named_group_to_str(group),
+                              group));
 
     /* Check if we have space for header and length fields:
      * - extension_type         (2 bytes)
@@ -1905,35 +1846,36 @@
      * - group                  (2 bytes)
      * - key_exchange_length    (2 bytes)
      */
-    MBEDTLS_SSL_CHK_BUF_PTR( p, end, 8 );
-    MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_KEY_SHARE, p, 0 );
-    MBEDTLS_PUT_UINT16_BE( group, server_share, 0 );
+    MBEDTLS_SSL_CHK_BUF_PTR(p, end, 8);
+    MBEDTLS_PUT_UINT16_BE(MBEDTLS_TLS_EXT_KEY_SHARE, p, 0);
+    MBEDTLS_PUT_UINT16_BE(group, server_share, 0);
     p += 8;
 
     /* When we introduce PQC-ECDHE hybrids, we'll want to call this
      * function multiple times. */
     ret = ssl_tls13_generate_and_write_key_share(
-              ssl, group, server_share + 4, end, &key_exchange_length );
-    if( ret != 0 )
-        return( ret );
+        ssl, group, server_share + 4, end, &key_exchange_length);
+    if (ret != 0) {
+        return ret;
+    }
     p += key_exchange_length;
 
-    MBEDTLS_PUT_UINT16_BE( key_exchange_length, server_share + 2, 0 );
+    MBEDTLS_PUT_UINT16_BE(key_exchange_length, server_share + 2, 0);
 
-    MBEDTLS_PUT_UINT16_BE( p - server_share, buf, 2 );
+    MBEDTLS_PUT_UINT16_BE(p - server_share, buf, 2);
 
     *out_len = p - buf;
 
-    mbedtls_ssl_tls13_set_hs_sent_ext_mask( ssl, MBEDTLS_TLS_EXT_KEY_SHARE );
+    mbedtls_ssl_tls13_set_hs_sent_ext_mask(ssl, MBEDTLS_TLS_EXT_KEY_SHARE);
 
-    return( 0 );
+    return 0;
 }
 
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_write_hrr_key_share_ext( mbedtls_ssl_context *ssl,
-                                              unsigned char *buf,
-                                              unsigned char *end,
-                                              size_t *out_len )
+static int ssl_tls13_write_hrr_key_share_ext(mbedtls_ssl_context *ssl,
+                                             unsigned char *buf,
+                                             unsigned char *end,
+                                             size_t *out_len)
 {
     uint16_t selected_group = ssl->handshake->hrr_selected_group;
     /* key_share Extension
@@ -1955,21 +1897,20 @@
      * of the HRR is then to transmit a cookie to force the client to demonstrate
      * reachability at their apparent network address (primarily useful for DTLS).
      */
-    if( ! mbedtls_ssl_tls13_key_exchange_mode_with_ephemeral( ssl ) )
-        return( 0 );
+    if (!mbedtls_ssl_tls13_key_exchange_mode_with_ephemeral(ssl)) {
+        return 0;
+    }
 
     /* We should only send the key_share extension if the client's initial
      * key share was not acceptable. */
-    if( ssl->handshake->offered_group_id != 0 )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 4, ( "Skip key_share extension in HRR" ) );
-        return( 0 );
+    if (ssl->handshake->offered_group_id != 0) {
+        MBEDTLS_SSL_DEBUG_MSG(4, ("Skip key_share extension in HRR"));
+        return 0;
     }
 
-    if( selected_group == 0 )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 1, ( "no matching named group found" ) );
-        return( MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
+    if (selected_group == 0) {
+        MBEDTLS_SSL_DEBUG_MSG(1, ("no matching named group found"));
+        return MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE;
     }
 
     /* Check if we have enough space:
@@ -1977,22 +1918,22 @@
      * - extension_data_length  (2 bytes)
      * - selected_group         (2 bytes)
      */
-    MBEDTLS_SSL_CHK_BUF_PTR( buf, end, 6 );
+    MBEDTLS_SSL_CHK_BUF_PTR(buf, end, 6);
 
-    MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_KEY_SHARE, buf, 0 );
-    MBEDTLS_PUT_UINT16_BE( 2, buf, 2 );
-    MBEDTLS_PUT_UINT16_BE( selected_group, buf, 4 );
+    MBEDTLS_PUT_UINT16_BE(MBEDTLS_TLS_EXT_KEY_SHARE, buf, 0);
+    MBEDTLS_PUT_UINT16_BE(2, buf, 2);
+    MBEDTLS_PUT_UINT16_BE(selected_group, buf, 4);
 
-    MBEDTLS_SSL_DEBUG_MSG( 3,
-        ( "HRR selected_group: %s (%x)",
-            mbedtls_ssl_named_group_to_str( selected_group ),
-            selected_group ) );
+    MBEDTLS_SSL_DEBUG_MSG(3,
+                          ("HRR selected_group: %s (%x)",
+                           mbedtls_ssl_named_group_to_str(selected_group),
+                           selected_group));
 
     *out_len = 6;
 
-    mbedtls_ssl_tls13_set_hs_sent_ext_mask( ssl, MBEDTLS_TLS_EXT_KEY_SHARE );
+    mbedtls_ssl_tls13_set_hs_sent_ext_mask(ssl, MBEDTLS_TLS_EXT_KEY_SHARE);
 
-    return( 0 );
+    return 0;
 }
 
 /*
@@ -2008,11 +1949,11 @@
  *    } ServerHello;
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_write_server_hello_body( mbedtls_ssl_context *ssl,
-                                              unsigned char *buf,
-                                              unsigned char *end,
-                                              size_t *out_len,
-                                              int is_hrr )
+static int ssl_tls13_write_server_hello_body(mbedtls_ssl_context *ssl,
+                                             unsigned char *buf,
+                                             unsigned char *end,
+                                             size_t *out_len,
+                                             int is_hrr)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *p = buf;
@@ -2028,8 +1969,8 @@
      * with ProtocolVersion defined as:
      * uint16 ProtocolVersion;
      */
-    MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
-    MBEDTLS_PUT_UINT16_BE( 0x0303, p, 0 );
+    MBEDTLS_SSL_CHK_BUF_PTR(p, end, 2);
+    MBEDTLS_PUT_UINT16_BE(0x0303, p, 0);
     p += 2;
 
     /* ...
@@ -2038,35 +1979,31 @@
      * with Random defined as:
      * opaque Random[MBEDTLS_SERVER_HELLO_RANDOM_LEN];
      */
-    MBEDTLS_SSL_CHK_BUF_PTR( p, end, MBEDTLS_SERVER_HELLO_RANDOM_LEN );
-    if( is_hrr )
-    {
-        memcpy( p, mbedtls_ssl_tls13_hello_retry_request_magic,
-                MBEDTLS_SERVER_HELLO_RANDOM_LEN );
+    MBEDTLS_SSL_CHK_BUF_PTR(p, end, MBEDTLS_SERVER_HELLO_RANDOM_LEN);
+    if (is_hrr) {
+        memcpy(p, mbedtls_ssl_tls13_hello_retry_request_magic,
+               MBEDTLS_SERVER_HELLO_RANDOM_LEN);
+    } else {
+        memcpy(p, &ssl->handshake->randbytes[MBEDTLS_CLIENT_HELLO_RANDOM_LEN],
+               MBEDTLS_SERVER_HELLO_RANDOM_LEN);
     }
-    else
-    {
-        memcpy( p, &ssl->handshake->randbytes[MBEDTLS_CLIENT_HELLO_RANDOM_LEN],
-                MBEDTLS_SERVER_HELLO_RANDOM_LEN );
-    }
-    MBEDTLS_SSL_DEBUG_BUF( 3, "server hello, random bytes",
-                           p, MBEDTLS_SERVER_HELLO_RANDOM_LEN );
+    MBEDTLS_SSL_DEBUG_BUF(3, "server hello, random bytes",
+                          p, MBEDTLS_SERVER_HELLO_RANDOM_LEN);
     p += MBEDTLS_SERVER_HELLO_RANDOM_LEN;
 
     /* ...
      * opaque legacy_session_id_echo<0..32>;
      * ...
      */
-    MBEDTLS_SSL_CHK_BUF_PTR( p, end, 1 + ssl->session_negotiate->id_len );
-    *p++ = (unsigned char)ssl->session_negotiate->id_len;
-    if( ssl->session_negotiate->id_len > 0 )
-    {
-        memcpy( p, &ssl->session_negotiate->id[0],
-                ssl->session_negotiate->id_len );
+    MBEDTLS_SSL_CHK_BUF_PTR(p, end, 1 + ssl->session_negotiate->id_len);
+    *p++ = (unsigned char) ssl->session_negotiate->id_len;
+    if (ssl->session_negotiate->id_len > 0) {
+        memcpy(p, &ssl->session_negotiate->id[0],
+               ssl->session_negotiate->id_len);
         p += ssl->session_negotiate->id_len;
 
-        MBEDTLS_SSL_DEBUG_BUF( 3, "session id", ssl->session_negotiate->id,
-                               ssl->session_negotiate->id_len );
+        MBEDTLS_SSL_DEBUG_BUF(3, "session id", ssl->session_negotiate->id,
+                              ssl->session_negotiate->id_len);
     }
 
     /* ...
@@ -2075,20 +2012,20 @@
      * with CipherSuite defined as:
      * uint8 CipherSuite[2];
      */
-    MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
-    MBEDTLS_PUT_UINT16_BE( ssl->session_negotiate->ciphersuite, p, 0 );
+    MBEDTLS_SSL_CHK_BUF_PTR(p, end, 2);
+    MBEDTLS_PUT_UINT16_BE(ssl->session_negotiate->ciphersuite, p, 0);
     p += 2;
-    MBEDTLS_SSL_DEBUG_MSG( 3,
-        ( "server hello, chosen ciphersuite: %s ( id=%d )",
-          mbedtls_ssl_get_ciphersuite_name(
-            ssl->session_negotiate->ciphersuite ),
-          ssl->session_negotiate->ciphersuite ) );
+    MBEDTLS_SSL_DEBUG_MSG(3,
+                          ("server hello, chosen ciphersuite: %s ( id=%d )",
+                           mbedtls_ssl_get_ciphersuite_name(
+                               ssl->session_negotiate->ciphersuite),
+                           ssl->session_negotiate->ciphersuite));
 
     /* ...
      * uint8 legacy_compression_method = 0;
      * ...
      */
-    MBEDTLS_SSL_CHK_BUF_PTR( p, end, 1 );
+    MBEDTLS_SSL_CHK_BUF_PTR(p, end, 1);
     *p++ = MBEDTLS_SSL_COMPRESS_NULL;
 
     /* ...
@@ -2099,103 +2036,101 @@
      *      opaque extension_data<0..2^16-1>;
      * } Extension;
      */
-    MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
+    MBEDTLS_SSL_CHK_BUF_PTR(p, end, 2);
     p_extensions_len = p;
     p += 2;
 
-    if( ( ret = ssl_tls13_write_server_hello_supported_versions_ext(
-                                            ssl, p, end, &output_len ) ) != 0 )
-    {
+    if ((ret = ssl_tls13_write_server_hello_supported_versions_ext(
+             ssl, p, end, &output_len)) != 0) {
         MBEDTLS_SSL_DEBUG_RET(
-            1, "ssl_tls13_write_server_hello_supported_versions_ext", ret );
-        return( ret );
+            1, "ssl_tls13_write_server_hello_supported_versions_ext", ret);
+        return ret;
     }
     p += output_len;
 
-    if( mbedtls_ssl_tls13_key_exchange_mode_with_ephemeral( ssl ) )
-    {
-        if( is_hrr )
-            ret = ssl_tls13_write_hrr_key_share_ext( ssl, p, end, &output_len );
-        else
-            ret = ssl_tls13_write_key_share_ext( ssl, p, end, &output_len );
-        if( ret != 0 )
-            return( ret );
+    if (mbedtls_ssl_tls13_key_exchange_mode_with_ephemeral(ssl)) {
+        if (is_hrr) {
+            ret = ssl_tls13_write_hrr_key_share_ext(ssl, p, end, &output_len);
+        } else {
+            ret = ssl_tls13_write_key_share_ext(ssl, p, end, &output_len);
+        }
+        if (ret != 0) {
+            return ret;
+        }
         p += output_len;
     }
 
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_SOME_PSK_ENABLED)
-    if( !is_hrr && mbedtls_ssl_tls13_key_exchange_mode_with_psk( ssl ) )
-    {
-        ret = ssl_tls13_write_server_pre_shared_key_ext( ssl, p, end, &output_len );
-        if( ret != 0 )
-        {
-            MBEDTLS_SSL_DEBUG_RET( 1, "ssl_tls13_write_server_pre_shared_key_ext",
-                                   ret );
-            return( ret );
+    if (!is_hrr && mbedtls_ssl_tls13_key_exchange_mode_with_psk(ssl)) {
+        ret = ssl_tls13_write_server_pre_shared_key_ext(ssl, p, end, &output_len);
+        if (ret != 0) {
+            MBEDTLS_SSL_DEBUG_RET(1, "ssl_tls13_write_server_pre_shared_key_ext",
+                                  ret);
+            return ret;
         }
         p += output_len;
     }
 #endif
 
-    MBEDTLS_PUT_UINT16_BE( p - p_extensions_len - 2, p_extensions_len, 0 );
+    MBEDTLS_PUT_UINT16_BE(p - p_extensions_len - 2, p_extensions_len, 0);
 
-    MBEDTLS_SSL_DEBUG_BUF( 4, "server hello extensions",
-                           p_extensions_len, p - p_extensions_len );
+    MBEDTLS_SSL_DEBUG_BUF(4, "server hello extensions",
+                          p_extensions_len, p - p_extensions_len);
 
     *out_len = p - buf;
 
-    MBEDTLS_SSL_DEBUG_BUF( 3, "server hello", buf, *out_len );
+    MBEDTLS_SSL_DEBUG_BUF(3, "server hello", buf, *out_len);
 
     MBEDTLS_SSL_PRINT_EXTS(
         3, is_hrr ? MBEDTLS_SSL_TLS1_3_HS_HELLO_RETRY_REQUEST :
-                    MBEDTLS_SSL_HS_SERVER_HELLO,
-        ssl->handshake->sent_extensions );
+        MBEDTLS_SSL_HS_SERVER_HELLO,
+        ssl->handshake->sent_extensions);
 
-    return( ret );
+    return ret;
 }
 
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_finalize_write_server_hello( mbedtls_ssl_context *ssl )
+static int ssl_tls13_finalize_write_server_hello(mbedtls_ssl_context *ssl)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-    ret = mbedtls_ssl_tls13_compute_handshake_transform( ssl );
-    if( ret != 0 )
-    {
-        MBEDTLS_SSL_DEBUG_RET( 1,
-                               "mbedtls_ssl_tls13_compute_handshake_transform",
-                               ret );
-        return( ret );
+    ret = mbedtls_ssl_tls13_compute_handshake_transform(ssl);
+    if (ret != 0) {
+        MBEDTLS_SSL_DEBUG_RET(1,
+                              "mbedtls_ssl_tls13_compute_handshake_transform",
+                              ret);
+        return ret;
     }
 
-    return( ret );
+    return ret;
 }
 
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_write_server_hello( mbedtls_ssl_context *ssl )
+static int ssl_tls13_write_server_hello(mbedtls_ssl_context *ssl)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *buf;
     size_t buf_len, msg_len;
 
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write server hello" ) );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("=> write server hello"));
 
-    MBEDTLS_SSL_PROC_CHK( ssl_tls13_prepare_server_hello( ssl ) );
+    MBEDTLS_SSL_PROC_CHK(ssl_tls13_prepare_server_hello(ssl));
 
-    MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_start_handshake_msg( ssl,
-                                MBEDTLS_SSL_HS_SERVER_HELLO, &buf, &buf_len ) );
+    MBEDTLS_SSL_PROC_CHK(mbedtls_ssl_start_handshake_msg(ssl,
+                                                         MBEDTLS_SSL_HS_SERVER_HELLO, &buf,
+                                                         &buf_len));
 
-    MBEDTLS_SSL_PROC_CHK( ssl_tls13_write_server_hello_body( ssl, buf,
-                                                             buf + buf_len,
-                                                             &msg_len,
-                                                             0 ) );
+    MBEDTLS_SSL_PROC_CHK(ssl_tls13_write_server_hello_body(ssl, buf,
+                                                           buf + buf_len,
+                                                           &msg_len,
+                                                           0));
 
     mbedtls_ssl_add_hs_msg_to_checksum(
-        ssl, MBEDTLS_SSL_HS_SERVER_HELLO, buf, msg_len );
+        ssl, MBEDTLS_SSL_HS_SERVER_HELLO, buf, msg_len);
 
-    MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_finish_handshake_msg(
-                              ssl, buf_len, msg_len ) );
+    MBEDTLS_SSL_PROC_CHK(mbedtls_ssl_finish_handshake_msg(
+                             ssl, buf_len, msg_len));
 
-    MBEDTLS_SSL_PROC_CHK( ssl_tls13_finalize_write_server_hello( ssl ) );
+    MBEDTLS_SSL_PROC_CHK(ssl_tls13_finalize_write_server_hello(ssl));
 
 #if defined(MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE)
     /* The server sends a dummy change_cipher_spec record immediately
@@ -2203,15 +2138,15 @@
      * a ServerHello or a HelloRetryRequest.
      */
     mbedtls_ssl_handshake_set_state(
-            ssl, MBEDTLS_SSL_SERVER_CCS_AFTER_SERVER_HELLO );
+        ssl, MBEDTLS_SSL_SERVER_CCS_AFTER_SERVER_HELLO);
 #else
-    mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_ENCRYPTED_EXTENSIONS );
+    mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_ENCRYPTED_EXTENSIONS);
 #endif /* MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE */
 
 cleanup:
 
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write server hello" ) );
-    return( ret );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("<= write server hello"));
+    return ret;
 }
 
 
@@ -2219,57 +2154,55 @@
  * Handler for MBEDTLS_SSL_HELLO_RETRY_REQUEST
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_prepare_hello_retry_request( mbedtls_ssl_context *ssl )
+static int ssl_tls13_prepare_hello_retry_request(mbedtls_ssl_context *ssl)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-    if( ssl->handshake->hello_retry_request_count > 0 )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 1, ( "Too many HRRs" ) );
-        MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE,
-                                      MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
-        return( MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
+    if (ssl->handshake->hello_retry_request_count > 0) {
+        MBEDTLS_SSL_DEBUG_MSG(1, ("Too many HRRs"));
+        MBEDTLS_SSL_PEND_FATAL_ALERT(MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE,
+                                     MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE);
+        return MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE;
     }
 
     /*
      * Create stateless transcript hash for HRR
      */
-    MBEDTLS_SSL_DEBUG_MSG( 4, ( "Reset transcript for HRR" ) );
-    ret = mbedtls_ssl_reset_transcript_for_hrr( ssl );
-    if( ret != 0 )
-    {
-        MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_reset_transcript_for_hrr", ret );
-        return( ret );
+    MBEDTLS_SSL_DEBUG_MSG(4, ("Reset transcript for HRR"));
+    ret = mbedtls_ssl_reset_transcript_for_hrr(ssl);
+    if (ret != 0) {
+        MBEDTLS_SSL_DEBUG_RET(1, "mbedtls_ssl_reset_transcript_for_hrr", ret);
+        return ret;
     }
-    mbedtls_ssl_session_reset_msg_layer( ssl, 0 );
+    mbedtls_ssl_session_reset_msg_layer(ssl, 0);
 
-    return( 0 );
+    return 0;
 }
 
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_write_hello_retry_request( mbedtls_ssl_context *ssl )
+static int ssl_tls13_write_hello_retry_request(mbedtls_ssl_context *ssl)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *buf;
     size_t buf_len, msg_len;
 
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write hello retry request" ) );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("=> write hello retry request"));
 
-    MBEDTLS_SSL_PROC_CHK( ssl_tls13_prepare_hello_retry_request( ssl ) );
+    MBEDTLS_SSL_PROC_CHK(ssl_tls13_prepare_hello_retry_request(ssl));
 
-    MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_start_handshake_msg(
-                              ssl, MBEDTLS_SSL_HS_SERVER_HELLO,
-                              &buf, &buf_len ) );
+    MBEDTLS_SSL_PROC_CHK(mbedtls_ssl_start_handshake_msg(
+                             ssl, MBEDTLS_SSL_HS_SERVER_HELLO,
+                             &buf, &buf_len));
 
-    MBEDTLS_SSL_PROC_CHK( ssl_tls13_write_server_hello_body( ssl, buf,
-                                                             buf + buf_len,
-                                                             &msg_len,
-                                                             1 ) );
+    MBEDTLS_SSL_PROC_CHK(ssl_tls13_write_server_hello_body(ssl, buf,
+                                                           buf + buf_len,
+                                                           &msg_len,
+                                                           1));
     mbedtls_ssl_add_hs_msg_to_checksum(
-        ssl, MBEDTLS_SSL_HS_SERVER_HELLO, buf, msg_len );
+        ssl, MBEDTLS_SSL_HS_SERVER_HELLO, buf, msg_len);
 
 
-    MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_finish_handshake_msg( ssl, buf_len,
-                                                            msg_len ) );
+    MBEDTLS_SSL_PROC_CHK(mbedtls_ssl_finish_handshake_msg(ssl, buf_len,
+                                                          msg_len));
 
     ssl->handshake->hello_retry_request_count++;
 
@@ -2279,14 +2212,14 @@
      * a ServerHello or a HelloRetryRequest.
      */
     mbedtls_ssl_handshake_set_state(
-            ssl, MBEDTLS_SSL_SERVER_CCS_AFTER_HELLO_RETRY_REQUEST );
+        ssl, MBEDTLS_SSL_SERVER_CCS_AFTER_HELLO_RETRY_REQUEST);
 #else
-    mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_HELLO );
+    mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_CLIENT_HELLO);
 #endif /* MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE */
 
 cleanup:
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write hello retry request" ) );
-    return( ret );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("<= write hello retry request"));
+    return ret;
 }
 
 /*
@@ -2300,10 +2233,10 @@
  *
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_write_encrypted_extensions_body( mbedtls_ssl_context *ssl,
-                                                      unsigned char *buf,
-                                                      unsigned char *end,
-                                                      size_t *out_len )
+static int ssl_tls13_write_encrypted_extensions_body(mbedtls_ssl_context *ssl,
+                                                     unsigned char *buf,
+                                                     unsigned char *end,
+                                                     size_t *out_len)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *p = buf;
@@ -2313,7 +2246,7 @@
 
     *out_len = 0;
 
-    MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
+    MBEDTLS_SSL_CHK_BUF_PTR(p, end, 2);
     p_extensions_len = p;
     p += 2;
 
@@ -2322,64 +2255,67 @@
     ((void) output_len);
 
 #if defined(MBEDTLS_SSL_ALPN)
-    ret = mbedtls_ssl_write_alpn_ext( ssl, p, end, &output_len );
-    if( ret != 0 )
-        return( ret );
+    ret = mbedtls_ssl_write_alpn_ext(ssl, p, end, &output_len);
+    if (ret != 0) {
+        return ret;
+    }
     p += output_len;
 #endif /* MBEDTLS_SSL_ALPN */
 
-    extensions_len = ( p - p_extensions_len ) - 2;
-    MBEDTLS_PUT_UINT16_BE( extensions_len, p_extensions_len, 0 );
+    extensions_len = (p - p_extensions_len) - 2;
+    MBEDTLS_PUT_UINT16_BE(extensions_len, p_extensions_len, 0);
 
     *out_len = p - buf;
 
-    MBEDTLS_SSL_DEBUG_BUF( 4, "encrypted extensions", buf, *out_len );
+    MBEDTLS_SSL_DEBUG_BUF(4, "encrypted extensions", buf, *out_len);
 
     MBEDTLS_SSL_PRINT_EXTS(
-        3, MBEDTLS_SSL_HS_ENCRYPTED_EXTENSIONS, ssl->handshake->sent_extensions );
+        3, MBEDTLS_SSL_HS_ENCRYPTED_EXTENSIONS, ssl->handshake->sent_extensions);
 
-    return( 0 );
+    return 0;
 }
 
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_write_encrypted_extensions( mbedtls_ssl_context *ssl )
+static int ssl_tls13_write_encrypted_extensions(mbedtls_ssl_context *ssl)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *buf;
     size_t buf_len, msg_len;
 
-    mbedtls_ssl_set_outbound_transform( ssl,
-                                        ssl->handshake->transform_handshake );
+    mbedtls_ssl_set_outbound_transform(ssl,
+                                       ssl->handshake->transform_handshake);
     MBEDTLS_SSL_DEBUG_MSG(
-        3, ( "switching to handshake transform for outbound data" ) );
+        3, ("switching to handshake transform for outbound data"));
 
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write encrypted extensions" ) );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("=> write encrypted extensions"));
 
-    MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_start_handshake_msg( ssl,
-                       MBEDTLS_SSL_HS_ENCRYPTED_EXTENSIONS, &buf, &buf_len ) );
+    MBEDTLS_SSL_PROC_CHK(mbedtls_ssl_start_handshake_msg(ssl,
+                                                         MBEDTLS_SSL_HS_ENCRYPTED_EXTENSIONS, &buf,
+                                                         &buf_len));
 
-    MBEDTLS_SSL_PROC_CHK( ssl_tls13_write_encrypted_extensions_body(
-                              ssl, buf, buf + buf_len, &msg_len ) );
+    MBEDTLS_SSL_PROC_CHK(ssl_tls13_write_encrypted_extensions_body(
+                             ssl, buf, buf + buf_len, &msg_len));
 
     mbedtls_ssl_add_hs_msg_to_checksum(
-        ssl, MBEDTLS_SSL_HS_ENCRYPTED_EXTENSIONS, buf, msg_len );
+        ssl, MBEDTLS_SSL_HS_ENCRYPTED_EXTENSIONS, buf, msg_len);
 
-    MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_finish_handshake_msg(
-                              ssl, buf_len, msg_len ) );
+    MBEDTLS_SSL_PROC_CHK(mbedtls_ssl_finish_handshake_msg(
+                             ssl, buf_len, msg_len));
 
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
-    if( mbedtls_ssl_tls13_key_exchange_mode_with_psk( ssl ) )
-        mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_SERVER_FINISHED );
-    else
-        mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CERTIFICATE_REQUEST );
+    if (mbedtls_ssl_tls13_key_exchange_mode_with_psk(ssl)) {
+        mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_SERVER_FINISHED);
+    } else {
+        mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_CERTIFICATE_REQUEST);
+    }
 #else
-    mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_SERVER_FINISHED );
+    mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_SERVER_FINISHED);
 #endif
 
 cleanup:
 
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write encrypted extensions" ) );
-    return( ret );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("<= write encrypted extensions"));
+    return ret;
 }
 
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
@@ -2394,26 +2330,25 @@
  * should be skipped or not.
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_certificate_request_coordinate( mbedtls_ssl_context *ssl )
+static int ssl_tls13_certificate_request_coordinate(mbedtls_ssl_context *ssl)
 {
     int authmode;
 
 #if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
-    if( ssl->handshake->sni_authmode != MBEDTLS_SSL_VERIFY_UNSET )
+    if (ssl->handshake->sni_authmode != MBEDTLS_SSL_VERIFY_UNSET) {
         authmode = ssl->handshake->sni_authmode;
-    else
+    } else
 #endif
     authmode = ssl->conf->authmode;
 
-    if( authmode == MBEDTLS_SSL_VERIFY_NONE )
-    {
+    if (authmode == MBEDTLS_SSL_VERIFY_NONE) {
         ssl->session_negotiate->verify_result = MBEDTLS_X509_BADCERT_SKIP_VERIFY;
-        return( SSL_CERTIFICATE_REQUEST_SKIP );
+        return SSL_CERTIFICATE_REQUEST_SKIP;
     }
 
     ssl->handshake->certificate_request_sent = 1;
 
-    return( SSL_CERTIFICATE_REQUEST_SEND_REQUEST );
+    return SSL_CERTIFICATE_REQUEST_SEND_REQUEST;
 }
 
 /*
@@ -2424,10 +2359,10 @@
  *
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_write_certificate_request_body( mbedtls_ssl_context *ssl,
-                                                     unsigned char *buf,
-                                                     const unsigned char *end,
-                                                     size_t *out_len )
+static int ssl_tls13_write_certificate_request_body(mbedtls_ssl_context *ssl,
+                                                    unsigned char *buf,
+                                                    const unsigned char *end,
+                                                    size_t *out_len)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *p = buf;
@@ -2440,7 +2375,7 @@
      * - certificate_request_context (1 byte)
      * - extensions length           (2 bytes)
      */
-    MBEDTLS_SSL_CHK_BUF_PTR( p, end, 3 );
+    MBEDTLS_SSL_CHK_BUF_PTR(p, end, 3);
 
     /*
      * Write certificate_request_context
@@ -2458,103 +2393,101 @@
     /* The extensions must contain the signature_algorithms. */
     p_extensions_len = p;
     p += 2;
-    ret = mbedtls_ssl_write_sig_alg_ext( ssl, p, end, &output_len );
-    if( ret != 0 )
-        return( ret );
+    ret = mbedtls_ssl_write_sig_alg_ext(ssl, p, end, &output_len);
+    if (ret != 0) {
+        return ret;
+    }
 
     p += output_len;
-    MBEDTLS_PUT_UINT16_BE( p - p_extensions_len - 2, p_extensions_len, 0 );
+    MBEDTLS_PUT_UINT16_BE(p - p_extensions_len - 2, p_extensions_len, 0);
 
     *out_len = p - buf;
 
     MBEDTLS_SSL_PRINT_EXTS(
-        3, MBEDTLS_SSL_HS_CERTIFICATE_REQUEST, ssl->handshake->sent_extensions );
+        3, MBEDTLS_SSL_HS_CERTIFICATE_REQUEST, ssl->handshake->sent_extensions);
 
-    return( 0 );
+    return 0;
 }
 
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_write_certificate_request( mbedtls_ssl_context *ssl )
+static int ssl_tls13_write_certificate_request(mbedtls_ssl_context *ssl)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate request" ) );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("=> write certificate request"));
 
-    MBEDTLS_SSL_PROC_CHK_NEG( ssl_tls13_certificate_request_coordinate( ssl ) );
+    MBEDTLS_SSL_PROC_CHK_NEG(ssl_tls13_certificate_request_coordinate(ssl));
 
-    if( ret == SSL_CERTIFICATE_REQUEST_SEND_REQUEST )
-    {
+    if (ret == SSL_CERTIFICATE_REQUEST_SEND_REQUEST) {
         unsigned char *buf;
         size_t buf_len, msg_len;
 
-        MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_start_handshake_msg( ssl,
-                MBEDTLS_SSL_HS_CERTIFICATE_REQUEST, &buf, &buf_len ) );
+        MBEDTLS_SSL_PROC_CHK(mbedtls_ssl_start_handshake_msg(ssl,
+                                                             MBEDTLS_SSL_HS_CERTIFICATE_REQUEST,
+                                                             &buf, &buf_len));
 
-        MBEDTLS_SSL_PROC_CHK( ssl_tls13_write_certificate_request_body(
-                                  ssl, buf, buf + buf_len, &msg_len ) );
+        MBEDTLS_SSL_PROC_CHK(ssl_tls13_write_certificate_request_body(
+                                 ssl, buf, buf + buf_len, &msg_len));
 
         mbedtls_ssl_add_hs_msg_to_checksum(
-            ssl, MBEDTLS_SSL_HS_CERTIFICATE_REQUEST, buf, msg_len );
+            ssl, MBEDTLS_SSL_HS_CERTIFICATE_REQUEST, buf, msg_len);
 
-        MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_finish_handshake_msg(
-                                  ssl, buf_len, msg_len ) );
-    }
-    else if( ret == SSL_CERTIFICATE_REQUEST_SKIP )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate request" ) );
+        MBEDTLS_SSL_PROC_CHK(mbedtls_ssl_finish_handshake_msg(
+                                 ssl, buf_len, msg_len));
+    } else if (ret == SSL_CERTIFICATE_REQUEST_SKIP) {
+        MBEDTLS_SSL_DEBUG_MSG(2, ("<= skip write certificate request"));
         ret = 0;
-    }
-    else
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
+    } else {
+        MBEDTLS_SSL_DEBUG_MSG(1, ("should never happen"));
         ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR;
         goto cleanup;
     }
 
-    mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_SERVER_CERTIFICATE );
+    mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_SERVER_CERTIFICATE);
 cleanup:
 
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write certificate request" ) );
-    return( ret );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("<= write certificate request"));
+    return ret;
 }
 
 /*
  * Handler for MBEDTLS_SSL_SERVER_CERTIFICATE
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_write_server_certificate( mbedtls_ssl_context *ssl )
+static int ssl_tls13_write_server_certificate(mbedtls_ssl_context *ssl)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
-    if( ( ssl_tls13_pick_key_cert( ssl ) != 0 ) ||
-          mbedtls_ssl_own_cert( ssl ) == NULL )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 2, ( "No certificate available." ) );
-        MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE,
-                                      MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE);
-        return( MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
+    if ((ssl_tls13_pick_key_cert(ssl) != 0) ||
+        mbedtls_ssl_own_cert(ssl) == NULL) {
+        MBEDTLS_SSL_DEBUG_MSG(2, ("No certificate available."));
+        MBEDTLS_SSL_PEND_FATAL_ALERT(MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE,
+                                     MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE);
+        return MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE;
     }
 #endif /* MBEDTLS_X509_CRT_PARSE_C */
 
-    ret = mbedtls_ssl_tls13_write_certificate( ssl );
-    if( ret != 0 )
-        return( ret );
-    mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CERTIFICATE_VERIFY );
-    return( 0 );
+    ret = mbedtls_ssl_tls13_write_certificate(ssl);
+    if (ret != 0) {
+        return ret;
+    }
+    mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_CERTIFICATE_VERIFY);
+    return 0;
 }
 
 /*
  * Handler for MBEDTLS_SSL_CERTIFICATE_VERIFY
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_write_certificate_verify( mbedtls_ssl_context *ssl )
+static int ssl_tls13_write_certificate_verify(mbedtls_ssl_context *ssl)
 {
-    int ret = mbedtls_ssl_tls13_write_certificate_verify( ssl );
-    if( ret != 0 )
-        return( ret );
-    mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_SERVER_FINISHED );
-    return( 0 );
+    int ret = mbedtls_ssl_tls13_write_certificate_verify(ssl);
+    if (ret != 0) {
+        return ret;
+    }
+    mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_SERVER_FINISHED);
+    return 0;
 }
 #endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED */
 
@@ -2562,77 +2495,76 @@
  * Handler for MBEDTLS_SSL_SERVER_FINISHED
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_write_server_finished( mbedtls_ssl_context *ssl )
+static int ssl_tls13_write_server_finished(mbedtls_ssl_context *ssl)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    ret = mbedtls_ssl_tls13_write_finished_message( ssl );
-    if( ret != 0 )
-        return( ret );
+    ret = mbedtls_ssl_tls13_write_finished_message(ssl);
+    if (ret != 0) {
+        return ret;
+    }
 
-    ret = mbedtls_ssl_tls13_compute_application_transform( ssl );
-    if( ret != 0 )
-    {
+    ret = mbedtls_ssl_tls13_compute_application_transform(ssl);
+    if (ret != 0) {
         MBEDTLS_SSL_PEND_FATAL_ALERT(
-                MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE,
-                MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
-        return( ret );
+            MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE,
+            MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE);
+        return ret;
     }
 
-    MBEDTLS_SSL_DEBUG_MSG( 1, ( "Switch to handshake keys for inbound traffic" ) );
-    mbedtls_ssl_set_inbound_transform( ssl, ssl->handshake->transform_handshake );
+    MBEDTLS_SSL_DEBUG_MSG(1, ("Switch to handshake keys for inbound traffic"));
+    mbedtls_ssl_set_inbound_transform(ssl, ssl->handshake->transform_handshake);
 
-    if( ssl->handshake->certificate_request_sent )
-        mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_CERTIFICATE );
-    else
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 2, ( "skip parse certificate" ) );
-        MBEDTLS_SSL_DEBUG_MSG( 2, ( "skip parse certificate verify" ) );
-        mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_FINISHED );
+    if (ssl->handshake->certificate_request_sent) {
+        mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_CLIENT_CERTIFICATE);
+    } else {
+        MBEDTLS_SSL_DEBUG_MSG(2, ("skip parse certificate"));
+        MBEDTLS_SSL_DEBUG_MSG(2, ("skip parse certificate verify"));
+        mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_CLIENT_FINISHED);
     }
 
-    return( 0 );
+    return 0;
 }
 
 /*
  * Handler for MBEDTLS_SSL_CLIENT_FINISHED
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_process_client_finished( mbedtls_ssl_context *ssl )
+static int ssl_tls13_process_client_finished(mbedtls_ssl_context *ssl)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    ret = mbedtls_ssl_tls13_process_finished_message( ssl );
-    if( ret != 0 )
-        return( ret );
-
-    ret = mbedtls_ssl_tls13_compute_resumption_master_secret( ssl );
-    if( ret != 0 )
-    {
-        MBEDTLS_SSL_DEBUG_RET( 1,
-            "mbedtls_ssl_tls13_compute_resumption_master_secret", ret );
+    ret = mbedtls_ssl_tls13_process_finished_message(ssl);
+    if (ret != 0) {
+        return ret;
     }
 
-    mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_HANDSHAKE_WRAPUP );
-    return( 0 );
+    ret = mbedtls_ssl_tls13_compute_resumption_master_secret(ssl);
+    if (ret != 0) {
+        MBEDTLS_SSL_DEBUG_RET(1,
+                              "mbedtls_ssl_tls13_compute_resumption_master_secret", ret);
+    }
+
+    mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_HANDSHAKE_WRAPUP);
+    return 0;
 }
 
 /*
  * Handler for MBEDTLS_SSL_HANDSHAKE_WRAPUP
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_handshake_wrapup( mbedtls_ssl_context *ssl )
+static int ssl_tls13_handshake_wrapup(mbedtls_ssl_context *ssl)
 {
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "handshake: done" ) );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("handshake: done"));
 
-    mbedtls_ssl_tls13_handshake_wrapup( ssl );
+    mbedtls_ssl_tls13_handshake_wrapup(ssl);
 
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
-    mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_TLS1_3_NEW_SESSION_TICKET );
+    mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_TLS1_3_NEW_SESSION_TICKET);
 #else
-    mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_HANDSHAKE_OVER );
+    mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_HANDSHAKE_OVER);
 #endif
-    return( 0 );
+    return 0;
 }
 
 /*
@@ -2641,37 +2573,34 @@
 #define SSL_NEW_SESSION_TICKET_SKIP  0
 #define SSL_NEW_SESSION_TICKET_WRITE 1
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_write_new_session_ticket_coordinate( mbedtls_ssl_context *ssl )
+static int ssl_tls13_write_new_session_ticket_coordinate(mbedtls_ssl_context *ssl)
 {
     /* Check whether the use of session tickets is enabled */
-    if( ssl->conf->f_ticket_write == NULL )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 2, ( "NewSessionTicket: disabled,"
-                                        " callback is not set" ) );
-        return( SSL_NEW_SESSION_TICKET_SKIP );
+    if (ssl->conf->f_ticket_write == NULL) {
+        MBEDTLS_SSL_DEBUG_MSG(2, ("NewSessionTicket: disabled,"
+                                  " callback is not set"));
+        return SSL_NEW_SESSION_TICKET_SKIP;
     }
-    if( ssl->conf->new_session_tickets_count == 0 )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 2, ( "NewSessionTicket: disabled,"
-                                        " configured count is zero" ) );
-        return( SSL_NEW_SESSION_TICKET_SKIP );
+    if (ssl->conf->new_session_tickets_count == 0) {
+        MBEDTLS_SSL_DEBUG_MSG(2, ("NewSessionTicket: disabled,"
+                                  " configured count is zero"));
+        return SSL_NEW_SESSION_TICKET_SKIP;
     }
 
-    if( ssl->handshake->new_session_tickets_count == 0 )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 2, ( "NewSessionTicket: all tickets have "
-                                        "been sent." ) );
-        return( SSL_NEW_SESSION_TICKET_SKIP );
+    if (ssl->handshake->new_session_tickets_count == 0) {
+        MBEDTLS_SSL_DEBUG_MSG(2, ("NewSessionTicket: all tickets have "
+                                  "been sent."));
+        return SSL_NEW_SESSION_TICKET_SKIP;
     }
 
-    return( SSL_NEW_SESSION_TICKET_WRITE );
+    return SSL_NEW_SESSION_TICKET_WRITE;
 }
 
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_prepare_new_session_ticket( mbedtls_ssl_context *ssl,
-                                                 unsigned char *ticket_nonce,
-                                                 size_t ticket_nonce_size )
+static int ssl_tls13_prepare_new_session_ticket(mbedtls_ssl_context *ssl,
+                                                unsigned char *ticket_nonce,
+                                                size_t ticket_nonce_size)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     mbedtls_ssl_session *session = ssl->session;
@@ -2679,41 +2608,38 @@
     psa_algorithm_t psa_hash_alg;
     int hash_length;
 
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> prepare NewSessionTicket msg" ) );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("=> prepare NewSessionTicket msg"));
 
 #if defined(MBEDTLS_HAVE_TIME)
-    session->start = mbedtls_time( NULL );
+    session->start = mbedtls_time(NULL);
 #endif
 
     /* Generate ticket_age_add */
-    if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng,
-                                  (unsigned char *) &session->ticket_age_add,
-                                  sizeof( session->ticket_age_add ) ) != 0 ) )
-    {
-        MBEDTLS_SSL_DEBUG_RET( 1, "generate_ticket_age_add", ret );
-        return( ret );
+    if ((ret = ssl->conf->f_rng(ssl->conf->p_rng,
+                                (unsigned char *) &session->ticket_age_add,
+                                sizeof(session->ticket_age_add)) != 0)) {
+        MBEDTLS_SSL_DEBUG_RET(1, "generate_ticket_age_add", ret);
+        return ret;
     }
-    MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket_age_add: %u",
-                                (unsigned int)session->ticket_age_add ) );
+    MBEDTLS_SSL_DEBUG_MSG(3, ("ticket_age_add: %u",
+                              (unsigned int) session->ticket_age_add));
 
     /* Generate ticket_nonce */
-    ret = ssl->conf->f_rng( ssl->conf->p_rng, ticket_nonce, ticket_nonce_size );
-    if( ret != 0 )
-    {
-        MBEDTLS_SSL_DEBUG_RET( 1, "generate_ticket_nonce", ret );
-        return( ret );
+    ret = ssl->conf->f_rng(ssl->conf->p_rng, ticket_nonce, ticket_nonce_size);
+    if (ret != 0) {
+        MBEDTLS_SSL_DEBUG_RET(1, "generate_ticket_nonce", ret);
+        return ret;
     }
-    MBEDTLS_SSL_DEBUG_BUF( 3, "ticket_nonce:",
-                           ticket_nonce, ticket_nonce_size );
+    MBEDTLS_SSL_DEBUG_BUF(3, "ticket_nonce:",
+                          ticket_nonce, ticket_nonce_size);
 
     ciphersuite_info =
-                (mbedtls_ssl_ciphersuite_t *) ssl->handshake->ciphersuite_info;
-    psa_hash_alg = mbedtls_psa_translate_md( ciphersuite_info->mac );
-    hash_length = PSA_HASH_LENGTH( psa_hash_alg );
-    if( hash_length == -1 ||
-        (size_t)hash_length > sizeof( session->resumption_key ) )
-    {
-        return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
+        (mbedtls_ssl_ciphersuite_t *) ssl->handshake->ciphersuite_info;
+    psa_hash_alg = mbedtls_psa_translate_md(ciphersuite_info->mac);
+    hash_length = PSA_HASH_LENGTH(psa_hash_alg);
+    if (hash_length == -1 ||
+        (size_t) hash_length > sizeof(session->resumption_key)) {
+        return MBEDTLS_ERR_SSL_INTERNAL_ERROR;
     }
 
     /* In this code the psk key length equals the length of the hash */
@@ -2726,31 +2652,30 @@
      *                    "resumption", ticket_nonce, Hash.length )
      */
     ret = mbedtls_ssl_tls13_hkdf_expand_label(
-               psa_hash_alg,
-               session->app_secrets.resumption_master_secret,
-               hash_length,
-               MBEDTLS_SSL_TLS1_3_LBL_WITH_LEN( resumption ),
-               ticket_nonce,
-               ticket_nonce_size,
-               session->resumption_key,
-               hash_length );
+        psa_hash_alg,
+        session->app_secrets.resumption_master_secret,
+        hash_length,
+        MBEDTLS_SSL_TLS1_3_LBL_WITH_LEN(resumption),
+        ticket_nonce,
+        ticket_nonce_size,
+        session->resumption_key,
+        hash_length);
 
-    if( ret != 0 )
-    {
-        MBEDTLS_SSL_DEBUG_RET( 2,
-                               "Creating the ticket-resumed PSK failed",
-                               ret );
-        return ( ret );
+    if (ret != 0) {
+        MBEDTLS_SSL_DEBUG_RET(2,
+                              "Creating the ticket-resumed PSK failed",
+                              ret);
+        return ret;
     }
-    MBEDTLS_SSL_DEBUG_BUF( 3, "Ticket-resumed PSK",
-                           session->resumption_key,
-                           session->resumption_key_len );
+    MBEDTLS_SSL_DEBUG_BUF(3, "Ticket-resumed PSK",
+                          session->resumption_key,
+                          session->resumption_key_len);
 
-    MBEDTLS_SSL_DEBUG_BUF( 3, "resumption_master_secret",
-                           session->app_secrets.resumption_master_secret,
-                           hash_length );
+    MBEDTLS_SSL_DEBUG_BUF(3, "resumption_master_secret",
+                          session->app_secrets.resumption_master_secret,
+                          hash_length);
 
-    return( 0 );
+    return 0;
 }
 
 /* This function creates a NewSessionTicket message in the following format:
@@ -2778,12 +2703,12 @@
  *  - ciphersuite (ciphersuite)
  */
 MBEDTLS_CHECK_RETURN_CRITICAL
-static int ssl_tls13_write_new_session_ticket_body( mbedtls_ssl_context *ssl,
-                                                    unsigned char *buf,
-                                                    unsigned char *end,
-                                                    size_t *out_len,
-                                                    unsigned char *ticket_nonce,
-                                                    size_t ticket_nonce_size )
+static int ssl_tls13_write_new_session_ticket_body(mbedtls_ssl_context *ssl,
+                                                   unsigned char *buf,
+                                                   unsigned char *end,
+                                                   size_t *out_len,
+                                                   unsigned char *ticket_nonce,
+                                                   size_t ticket_nonce_size)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *p = buf;
@@ -2792,7 +2717,7 @@
     uint32_t ticket_lifetime;
 
     *out_len = 0;
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write NewSessionTicket msg" ) );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("=> write NewSessionTicket msg"));
 
     /*
      *    ticket_lifetime   4 bytes
@@ -2800,19 +2725,18 @@
      *    ticket_nonce      1 + ticket_nonce_size bytes
      *    ticket            >=2 bytes
      */
-    MBEDTLS_SSL_CHK_BUF_PTR( p, end, 4 + 4 + 1 + ticket_nonce_size + 2 );
+    MBEDTLS_SSL_CHK_BUF_PTR(p, end, 4 + 4 + 1 + ticket_nonce_size + 2);
 
     /* Generate ticket and ticket_lifetime */
-    ret = ssl->conf->f_ticket_write( ssl->conf->p_ticket,
-                                     session,
-                                     p + 9 + ticket_nonce_size + 2,
-                                     end,
-                                     &ticket_len,
-                                     &ticket_lifetime);
-    if( ret != 0 )
-    {
-        MBEDTLS_SSL_DEBUG_RET( 1, "write_ticket", ret );
-        return( ret );
+    ret = ssl->conf->f_ticket_write(ssl->conf->p_ticket,
+                                    session,
+                                    p + 9 + ticket_nonce_size + 2,
+                                    end,
+                                    &ticket_len,
+                                    &ticket_lifetime);
+    if (ret != 0) {
+        MBEDTLS_SSL_DEBUG_RET(1, "write_ticket", ret);
+        return ret;
     }
     /* RFC 8446 4.6.1
      *  ticket_lifetime:  Indicates the lifetime in seconds as a 32-bit
@@ -2825,29 +2749,29 @@
      *      MAY treat a ticket as valid for a shorter period of time than what
      *      is stated in the ticket_lifetime.
      */
-    if( ticket_lifetime > 604800 )
+    if (ticket_lifetime > 604800) {
         ticket_lifetime = 604800;
-    MBEDTLS_PUT_UINT32_BE( ticket_lifetime, p, 0 );
-    MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket_lifetime: %u",
-                                ( unsigned int )ticket_lifetime ) );
+    }
+    MBEDTLS_PUT_UINT32_BE(ticket_lifetime, p, 0);
+    MBEDTLS_SSL_DEBUG_MSG(3, ("ticket_lifetime: %u",
+                              (unsigned int) ticket_lifetime));
 
     /* Write ticket_age_add */
-    MBEDTLS_PUT_UINT32_BE( session->ticket_age_add, p, 4 );
-    MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket_age_add: %u",
-                                ( unsigned int )session->ticket_age_add ) );
+    MBEDTLS_PUT_UINT32_BE(session->ticket_age_add, p, 4);
+    MBEDTLS_SSL_DEBUG_MSG(3, ("ticket_age_add: %u",
+                              (unsigned int) session->ticket_age_add));
 
     /* Write ticket_nonce */
-    p[8] = ( unsigned char )ticket_nonce_size;
-    if( ticket_nonce_size > 0 )
-    {
-        memcpy( p + 9, ticket_nonce, ticket_nonce_size );
+    p[8] = (unsigned char) ticket_nonce_size;
+    if (ticket_nonce_size > 0) {
+        memcpy(p + 9, ticket_nonce, ticket_nonce_size);
     }
     p += 9 + ticket_nonce_size;
 
     /* Write ticket */
-    MBEDTLS_PUT_UINT16_BE( ticket_len, p, 0 );
+    MBEDTLS_PUT_UINT16_BE(ticket_len, p, 0);
     p += 2;
-    MBEDTLS_SSL_DEBUG_BUF( 4, "ticket", p, ticket_len);
+    MBEDTLS_SSL_DEBUG_BUF(4, "ticket", p, ticket_len);
     p += ticket_len;
 
     /* Ticket Extensions
@@ -2857,201 +2781,195 @@
      */
     ssl->handshake->sent_extensions = MBEDTLS_SSL_EXT_MASK_NONE;
 
-    MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
-    MBEDTLS_PUT_UINT16_BE( 0, p, 0 );
+    MBEDTLS_SSL_CHK_BUF_PTR(p, end, 2);
+    MBEDTLS_PUT_UINT16_BE(0, p, 0);
     p += 2;
 
     *out_len = p - buf;
-    MBEDTLS_SSL_DEBUG_BUF( 4, "ticket", buf, *out_len );
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write new session ticket" ) );
+    MBEDTLS_SSL_DEBUG_BUF(4, "ticket", buf, *out_len);
+    MBEDTLS_SSL_DEBUG_MSG(2, ("<= write new session ticket"));
 
     MBEDTLS_SSL_PRINT_EXTS(
-        3, MBEDTLS_SSL_HS_NEW_SESSION_TICKET, ssl->handshake->sent_extensions );
+        3, MBEDTLS_SSL_HS_NEW_SESSION_TICKET, ssl->handshake->sent_extensions);
 
-    return( 0 );
+    return 0;
 }
 
 /*
  * Handler for MBEDTLS_SSL_TLS1_3_NEW_SESSION_TICKET
  */
-static int ssl_tls13_write_new_session_ticket( mbedtls_ssl_context *ssl )
+static int ssl_tls13_write_new_session_ticket(mbedtls_ssl_context *ssl)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    MBEDTLS_SSL_PROC_CHK_NEG( ssl_tls13_write_new_session_ticket_coordinate( ssl ) );
+    MBEDTLS_SSL_PROC_CHK_NEG(ssl_tls13_write_new_session_ticket_coordinate(ssl));
 
-    if( ret == SSL_NEW_SESSION_TICKET_WRITE )
-    {
+    if (ret == SSL_NEW_SESSION_TICKET_WRITE) {
         unsigned char ticket_nonce[MBEDTLS_SSL_TLS1_3_TICKET_NONCE_LENGTH];
         unsigned char *buf;
         size_t buf_len, msg_len;
 
-        MBEDTLS_SSL_PROC_CHK( ssl_tls13_prepare_new_session_ticket(
-                                  ssl, ticket_nonce, sizeof( ticket_nonce ) ) );
+        MBEDTLS_SSL_PROC_CHK(ssl_tls13_prepare_new_session_ticket(
+                                 ssl, ticket_nonce, sizeof(ticket_nonce)));
 
-        MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_start_handshake_msg( ssl,
-                MBEDTLS_SSL_HS_NEW_SESSION_TICKET, &buf, &buf_len ) );
+        MBEDTLS_SSL_PROC_CHK(mbedtls_ssl_start_handshake_msg(ssl,
+                                                             MBEDTLS_SSL_HS_NEW_SESSION_TICKET,
+                                                             &buf, &buf_len));
 
-        MBEDTLS_SSL_PROC_CHK( ssl_tls13_write_new_session_ticket_body(
-                                  ssl, buf, buf + buf_len, &msg_len,
-                                  ticket_nonce, sizeof( ticket_nonce ) ) );
+        MBEDTLS_SSL_PROC_CHK(ssl_tls13_write_new_session_ticket_body(
+                                 ssl, buf, buf + buf_len, &msg_len,
+                                 ticket_nonce, sizeof(ticket_nonce)));
 
-        MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_finish_handshake_msg(
-                                  ssl, buf_len, msg_len ) );
+        MBEDTLS_SSL_PROC_CHK(mbedtls_ssl_finish_handshake_msg(
+                                 ssl, buf_len, msg_len));
 
         /* Limit session tickets count to one when resumption connection.
          *
          * See document of mbedtls_ssl_conf_new_session_tickets.
          */
-        if( ssl->handshake->resume == 1 )
+        if (ssl->handshake->resume == 1) {
             ssl->handshake->new_session_tickets_count = 0;
-        else
+        } else {
             ssl->handshake->new_session_tickets_count--;
+        }
 
         mbedtls_ssl_handshake_set_state(
-            ssl, MBEDTLS_SSL_TLS1_3_NEW_SESSION_TICKET_FLUSH );
-    }
-    else
-    {
-        mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_HANDSHAKE_OVER );
+            ssl, MBEDTLS_SSL_TLS1_3_NEW_SESSION_TICKET_FLUSH);
+    } else {
+        mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_HANDSHAKE_OVER);
     }
 
 cleanup:
 
-    return( ret );
+    return ret;
 }
 #endif /* MBEDTLS_SSL_SESSION_TICKETS */
 
 /*
  * TLS 1.3 State Machine -- server side
  */
-int mbedtls_ssl_tls13_handshake_server_step( mbedtls_ssl_context *ssl )
+int mbedtls_ssl_tls13_handshake_server_step(mbedtls_ssl_context *ssl)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER || ssl->handshake == NULL )
-        return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
+    if (ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER || ssl->handshake == NULL) {
+        return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
+    }
 
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "tls13 server state: %s(%d)",
-                                mbedtls_ssl_states_str( ssl->state ),
-                                ssl->state ) );
+    MBEDTLS_SSL_DEBUG_MSG(2, ("tls13 server state: %s(%d)",
+                              mbedtls_ssl_states_str(ssl->state),
+                              ssl->state));
 
-    switch( ssl->state )
-    {
+    switch (ssl->state) {
         /* start state */
         case MBEDTLS_SSL_HELLO_REQUEST:
-            mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_HELLO );
+            mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_CLIENT_HELLO);
             ret = 0;
             break;
 
         case MBEDTLS_SSL_CLIENT_HELLO:
-            ret = ssl_tls13_process_client_hello( ssl );
-            if( ret != 0 )
-                MBEDTLS_SSL_DEBUG_RET( 1, "ssl_tls13_process_client_hello", ret );
+            ret = ssl_tls13_process_client_hello(ssl);
+            if (ret != 0) {
+                MBEDTLS_SSL_DEBUG_RET(1, "ssl_tls13_process_client_hello", ret);
+            }
             break;
 
         case MBEDTLS_SSL_HELLO_RETRY_REQUEST:
-            ret = ssl_tls13_write_hello_retry_request( ssl );
-            if( ret != 0 )
-            {
-                MBEDTLS_SSL_DEBUG_RET( 1, "ssl_tls13_write_hello_retry_request", ret );
-                return( ret );
+            ret = ssl_tls13_write_hello_retry_request(ssl);
+            if (ret != 0) {
+                MBEDTLS_SSL_DEBUG_RET(1, "ssl_tls13_write_hello_retry_request", ret);
+                return ret;
             }
             break;
 
         case MBEDTLS_SSL_SERVER_HELLO:
-            ret = ssl_tls13_write_server_hello( ssl );
+            ret = ssl_tls13_write_server_hello(ssl);
             break;
 
         case MBEDTLS_SSL_ENCRYPTED_EXTENSIONS:
-            ret = ssl_tls13_write_encrypted_extensions( ssl );
-            if( ret != 0 )
-            {
-                MBEDTLS_SSL_DEBUG_RET( 1, "ssl_tls13_write_encrypted_extensions", ret );
-                return( ret );
+            ret = ssl_tls13_write_encrypted_extensions(ssl);
+            if (ret != 0) {
+                MBEDTLS_SSL_DEBUG_RET(1, "ssl_tls13_write_encrypted_extensions", ret);
+                return ret;
             }
             break;
 
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
         case MBEDTLS_SSL_CERTIFICATE_REQUEST:
-            ret = ssl_tls13_write_certificate_request( ssl );
+            ret = ssl_tls13_write_certificate_request(ssl);
             break;
 
         case MBEDTLS_SSL_SERVER_CERTIFICATE:
-            ret = ssl_tls13_write_server_certificate( ssl );
+            ret = ssl_tls13_write_server_certificate(ssl);
             break;
 
         case MBEDTLS_SSL_CERTIFICATE_VERIFY:
-            ret = ssl_tls13_write_certificate_verify( ssl );
+            ret = ssl_tls13_write_certificate_verify(ssl);
             break;
 #endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED */
 
-        /*
-         * Injection of dummy-CCS's for middlebox compatibility
-         */
+            /*
+             * Injection of dummy-CCS's for middlebox compatibility
+             */
 #if defined(MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE)
         case MBEDTLS_SSL_SERVER_CCS_AFTER_HELLO_RETRY_REQUEST:
-            ret = mbedtls_ssl_tls13_write_change_cipher_spec( ssl );
-            if( ret == 0 )
-                mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_HELLO );
+            ret = mbedtls_ssl_tls13_write_change_cipher_spec(ssl);
+            if (ret == 0) {
+                mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_CLIENT_HELLO);
+            }
             break;
 
         case MBEDTLS_SSL_SERVER_CCS_AFTER_SERVER_HELLO:
-            ret = mbedtls_ssl_tls13_write_change_cipher_spec( ssl );
-            if( ret == 0 )
-                mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_ENCRYPTED_EXTENSIONS );
+            ret = mbedtls_ssl_tls13_write_change_cipher_spec(ssl);
+            if (ret == 0) {
+                mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_ENCRYPTED_EXTENSIONS);
+            }
             break;
 #endif /* MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE */
 
         case MBEDTLS_SSL_SERVER_FINISHED:
-            ret = ssl_tls13_write_server_finished( ssl );
+            ret = ssl_tls13_write_server_finished(ssl);
             break;
 
         case MBEDTLS_SSL_CLIENT_FINISHED:
-            ret = ssl_tls13_process_client_finished( ssl );
+            ret = ssl_tls13_process_client_finished(ssl);
             break;
 
         case MBEDTLS_SSL_HANDSHAKE_WRAPUP:
-            ret = ssl_tls13_handshake_wrapup( ssl );
+            ret = ssl_tls13_handshake_wrapup(ssl);
             break;
 
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
         case MBEDTLS_SSL_CLIENT_CERTIFICATE:
-            ret = mbedtls_ssl_tls13_process_certificate( ssl );
-            if( ret == 0 )
-            {
-                if( ssl->session_negotiate->peer_cert != NULL )
-                {
+            ret = mbedtls_ssl_tls13_process_certificate(ssl);
+            if (ret == 0) {
+                if (ssl->session_negotiate->peer_cert != NULL) {
                     mbedtls_ssl_handshake_set_state(
-                        ssl, MBEDTLS_SSL_CLIENT_CERTIFICATE_VERIFY );
-                }
-                else
-                {
-                    MBEDTLS_SSL_DEBUG_MSG( 2, ( "skip parse certificate verify" ) );
+                        ssl, MBEDTLS_SSL_CLIENT_CERTIFICATE_VERIFY);
+                } else {
+                    MBEDTLS_SSL_DEBUG_MSG(2, ("skip parse certificate verify"));
                     mbedtls_ssl_handshake_set_state(
-                        ssl, MBEDTLS_SSL_CLIENT_FINISHED );
+                        ssl, MBEDTLS_SSL_CLIENT_FINISHED);
                 }
             }
             break;
 
         case MBEDTLS_SSL_CLIENT_CERTIFICATE_VERIFY:
-            ret = mbedtls_ssl_tls13_process_certificate_verify( ssl );
-            if( ret == 0 )
-            {
+            ret = mbedtls_ssl_tls13_process_certificate_verify(ssl);
+            if (ret == 0) {
                 mbedtls_ssl_handshake_set_state(
-                    ssl, MBEDTLS_SSL_CLIENT_FINISHED );
+                    ssl, MBEDTLS_SSL_CLIENT_FINISHED);
             }
             break;
 #endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED */
 
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
         case MBEDTLS_SSL_TLS1_3_NEW_SESSION_TICKET:
-            ret = ssl_tls13_write_new_session_ticket( ssl );
-            if( ret != 0 )
-            {
-                MBEDTLS_SSL_DEBUG_RET( 1,
-                                       "ssl_tls13_write_new_session_ticket ",
-                                       ret );
+            ret = ssl_tls13_write_new_session_ticket(ssl);
+            if (ret != 0) {
+                MBEDTLS_SSL_DEBUG_RET(1,
+                                      "ssl_tls13_write_new_session_ticket ",
+                                      ret);
             }
             break;
         case MBEDTLS_SSL_TLS1_3_NEW_SESSION_TICKET_FLUSH:
@@ -3061,20 +2979,21 @@
              */
             ret = 0;
 
-            if( ssl->handshake->new_session_tickets_count == 0 )
-                mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_HANDSHAKE_OVER );
-            else
-                mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_TLS1_3_NEW_SESSION_TICKET );
+            if (ssl->handshake->new_session_tickets_count == 0) {
+                mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_HANDSHAKE_OVER);
+            } else {
+                mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_TLS1_3_NEW_SESSION_TICKET);
+            }
             break;
 
 #endif /* MBEDTLS_SSL_SESSION_TICKETS */
 
         default:
-            MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid state %d", ssl->state ) );
-            return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
+            MBEDTLS_SSL_DEBUG_MSG(1, ("invalid state %d", ssl->state));
+            return MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
     }
 
-    return( ret );
+    return ret;
 }
 
 #endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_PROTO_TLS1_3 */