diff --git a/library/cipher.c b/library/cipher.c
index 67e3274..36f87c3 100644
--- a/library/cipher.c
+++ b/library/cipher.c
@@ -65,137 +65,144 @@
 
 #include "mbedtls/platform.h"
 
-#define CIPHER_VALIDATE_RET( cond )    \
-    MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA )
-#define CIPHER_VALIDATE( cond )        \
-    MBEDTLS_INTERNAL_VALIDATE( cond )
+#define CIPHER_VALIDATE_RET(cond)    \
+    MBEDTLS_INTERNAL_VALIDATE_RET(cond, MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA)
+#define CIPHER_VALIDATE(cond)        \
+    MBEDTLS_INTERNAL_VALIDATE(cond)
 
 static int supported_init = 0;
 
-const int *mbedtls_cipher_list( void )
+const int *mbedtls_cipher_list(void)
 {
     const mbedtls_cipher_definition_t *def;
     int *type;
 
-    if( ! supported_init )
-    {
+    if (!supported_init) {
         def = mbedtls_cipher_definitions;
         type = mbedtls_cipher_supported;
 
-        while( def->type != 0 )
+        while (def->type != 0) {
             *type++ = (*def++).type;
+        }
 
         *type = 0;
 
         supported_init = 1;
     }
 
-    return( mbedtls_cipher_supported );
+    return mbedtls_cipher_supported;
 }
 
 const mbedtls_cipher_info_t *mbedtls_cipher_info_from_type(
-    const mbedtls_cipher_type_t cipher_type )
+    const mbedtls_cipher_type_t cipher_type)
 {
     const mbedtls_cipher_definition_t *def;
 
-    for( def = mbedtls_cipher_definitions; def->info != NULL; def++ )
-        if( def->type == cipher_type )
-            return( def->info );
+    for (def = mbedtls_cipher_definitions; def->info != NULL; def++) {
+        if (def->type == cipher_type) {
+            return def->info;
+        }
+    }
 
-    return( NULL );
+    return NULL;
 }
 
 const mbedtls_cipher_info_t *mbedtls_cipher_info_from_string(
-    const char *cipher_name )
+    const char *cipher_name)
 {
     const mbedtls_cipher_definition_t *def;
 
-    if( NULL == cipher_name )
-        return( NULL );
+    if (NULL == cipher_name) {
+        return NULL;
+    }
 
-    for( def = mbedtls_cipher_definitions; def->info != NULL; def++ )
-        if( !  strcmp( def->info->name, cipher_name ) )
-            return( def->info );
+    for (def = mbedtls_cipher_definitions; def->info != NULL; def++) {
+        if (!strcmp(def->info->name, cipher_name)) {
+            return def->info;
+        }
+    }
 
-    return( NULL );
+    return NULL;
 }
 
 const mbedtls_cipher_info_t *mbedtls_cipher_info_from_values(
     const mbedtls_cipher_id_t cipher_id,
     int key_bitlen,
-    const mbedtls_cipher_mode_t mode )
+    const mbedtls_cipher_mode_t mode)
 {
     const mbedtls_cipher_definition_t *def;
 
-    for( def = mbedtls_cipher_definitions; def->info != NULL; def++ )
-        if( def->info->base->cipher == cipher_id &&
+    for (def = mbedtls_cipher_definitions; def->info != NULL; def++) {
+        if (def->info->base->cipher == cipher_id &&
             def->info->key_bitlen == (unsigned) key_bitlen &&
-            def->info->mode == mode )
-            return( def->info );
+            def->info->mode == mode) {
+            return def->info;
+        }
+    }
 
-    return( NULL );
+    return NULL;
 }
 
-void mbedtls_cipher_init( mbedtls_cipher_context_t *ctx )
+void mbedtls_cipher_init(mbedtls_cipher_context_t *ctx)
 {
-    CIPHER_VALIDATE( ctx != NULL );
-    memset( ctx, 0, sizeof( mbedtls_cipher_context_t ) );
+    CIPHER_VALIDATE(ctx != NULL);
+    memset(ctx, 0, sizeof(mbedtls_cipher_context_t));
 }
 
-void mbedtls_cipher_free( mbedtls_cipher_context_t *ctx )
+void mbedtls_cipher_free(mbedtls_cipher_context_t *ctx)
 {
-    if( ctx == NULL )
+    if (ctx == NULL) {
         return;
+    }
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
-        if( ctx->cipher_ctx != NULL )
-        {
+    if (ctx->psa_enabled == 1) {
+        if (ctx->cipher_ctx != NULL) {
             mbedtls_cipher_context_psa * const cipher_psa =
                 (mbedtls_cipher_context_psa *) ctx->cipher_ctx;
 
-            if( cipher_psa->slot_state == MBEDTLS_CIPHER_PSA_KEY_OWNED )
-            {
+            if (cipher_psa->slot_state == MBEDTLS_CIPHER_PSA_KEY_OWNED) {
                 /* xxx_free() doesn't allow to return failures. */
-                (void) psa_destroy_key( cipher_psa->slot );
+                (void) psa_destroy_key(cipher_psa->slot);
             }
 
-            mbedtls_platform_zeroize( cipher_psa, sizeof( *cipher_psa ) );
-            mbedtls_free( cipher_psa );
+            mbedtls_platform_zeroize(cipher_psa, sizeof(*cipher_psa));
+            mbedtls_free(cipher_psa);
         }
 
-        mbedtls_platform_zeroize( ctx, sizeof(mbedtls_cipher_context_t) );
+        mbedtls_platform_zeroize(ctx, sizeof(mbedtls_cipher_context_t));
         return;
     }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
 #if defined(MBEDTLS_CMAC_C)
-    if( ctx->cmac_ctx )
-    {
-       mbedtls_platform_zeroize( ctx->cmac_ctx,
-                                 sizeof( mbedtls_cmac_context_t ) );
-       mbedtls_free( ctx->cmac_ctx );
+    if (ctx->cmac_ctx) {
+        mbedtls_platform_zeroize(ctx->cmac_ctx,
+                                 sizeof(mbedtls_cmac_context_t));
+        mbedtls_free(ctx->cmac_ctx);
     }
 #endif
 
-    if( ctx->cipher_ctx )
-        ctx->cipher_info->base->ctx_free_func( ctx->cipher_ctx );
+    if (ctx->cipher_ctx) {
+        ctx->cipher_info->base->ctx_free_func(ctx->cipher_ctx);
+    }
 
-    mbedtls_platform_zeroize( ctx, sizeof(mbedtls_cipher_context_t) );
+    mbedtls_platform_zeroize(ctx, sizeof(mbedtls_cipher_context_t));
 }
 
-int mbedtls_cipher_setup( mbedtls_cipher_context_t *ctx,
-                          const mbedtls_cipher_info_t *cipher_info )
+int mbedtls_cipher_setup(mbedtls_cipher_context_t *ctx,
+                         const mbedtls_cipher_info_t *cipher_info)
 {
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    if( cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    CIPHER_VALIDATE_RET(ctx != NULL);
+    if (cipher_info == NULL) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 
-    memset( ctx, 0, sizeof( mbedtls_cipher_context_t ) );
+    memset(ctx, 0, sizeof(mbedtls_cipher_context_t));
 
-    if( NULL == ( ctx->cipher_ctx = cipher_info->base->ctx_alloc_func() ) )
-        return( MBEDTLS_ERR_CIPHER_ALLOC_FAILED );
+    if (NULL == (ctx->cipher_ctx = cipher_info->base->ctx_alloc_func())) {
+        return MBEDTLS_ERR_CIPHER_ALLOC_FAILED;
+    }
 
     ctx->cipher_info = cipher_info;
 
@@ -204,106 +211,112 @@
      * Ignore possible errors caused by a cipher mode that doesn't use padding
      */
 #if defined(MBEDTLS_CIPHER_PADDING_PKCS7)
-    (void) mbedtls_cipher_set_padding_mode( ctx, MBEDTLS_PADDING_PKCS7 );
+    (void) mbedtls_cipher_set_padding_mode(ctx, MBEDTLS_PADDING_PKCS7);
 #else
-    (void) mbedtls_cipher_set_padding_mode( ctx, MBEDTLS_PADDING_NONE );
+    (void) mbedtls_cipher_set_padding_mode(ctx, MBEDTLS_PADDING_NONE);
 #endif
 #endif /* MBEDTLS_CIPHER_MODE_WITH_PADDING */
 
-    return( 0 );
+    return 0;
 }
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-int mbedtls_cipher_setup_psa( mbedtls_cipher_context_t *ctx,
-                              const mbedtls_cipher_info_t *cipher_info,
-                              size_t taglen )
+int mbedtls_cipher_setup_psa(mbedtls_cipher_context_t *ctx,
+                             const mbedtls_cipher_info_t *cipher_info,
+                             size_t taglen)
 {
     psa_algorithm_t alg;
     mbedtls_cipher_context_psa *cipher_psa;
 
-    if( NULL == cipher_info || NULL == ctx )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    if (NULL == cipher_info || NULL == ctx) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 
     /* Check that the underlying cipher mode and cipher type are
      * supported by the underlying PSA Crypto implementation. */
-    alg = mbedtls_psa_translate_cipher_mode( cipher_info->mode, taglen );
-    if( alg == 0 )
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-    if( mbedtls_psa_translate_cipher_type( cipher_info->type ) == 0 )
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+    alg = mbedtls_psa_translate_cipher_mode(cipher_info->mode, taglen);
+    if (alg == 0) {
+        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
+    }
+    if (mbedtls_psa_translate_cipher_type(cipher_info->type) == 0) {
+        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
+    }
 
-    memset( ctx, 0, sizeof( mbedtls_cipher_context_t ) );
+    memset(ctx, 0, sizeof(mbedtls_cipher_context_t));
 
-    cipher_psa = mbedtls_calloc( 1, sizeof(mbedtls_cipher_context_psa ) );
-    if( cipher_psa == NULL )
-        return( MBEDTLS_ERR_CIPHER_ALLOC_FAILED );
+    cipher_psa = mbedtls_calloc(1, sizeof(mbedtls_cipher_context_psa));
+    if (cipher_psa == NULL) {
+        return MBEDTLS_ERR_CIPHER_ALLOC_FAILED;
+    }
     cipher_psa->alg  = alg;
     ctx->cipher_ctx  = cipher_psa;
     ctx->cipher_info = cipher_info;
     ctx->psa_enabled = 1;
-    return( 0 );
+    return 0;
 }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
-int mbedtls_cipher_setkey( mbedtls_cipher_context_t *ctx,
-                           const unsigned char *key,
-                           int key_bitlen,
-                           const mbedtls_operation_t operation )
+int mbedtls_cipher_setkey(mbedtls_cipher_context_t *ctx,
+                          const unsigned char *key,
+                          int key_bitlen,
+                          const mbedtls_operation_t operation)
 {
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( key != NULL );
-    CIPHER_VALIDATE_RET( operation == MBEDTLS_ENCRYPT ||
-                         operation == MBEDTLS_DECRYPT );
-    if( ctx->cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    CIPHER_VALIDATE_RET(ctx != NULL);
+    CIPHER_VALIDATE_RET(key != NULL);
+    CIPHER_VALIDATE_RET(operation == MBEDTLS_ENCRYPT ||
+                        operation == MBEDTLS_DECRYPT);
+    if (ctx->cipher_info == NULL) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
+    if (ctx->psa_enabled == 1) {
         mbedtls_cipher_context_psa * const cipher_psa =
             (mbedtls_cipher_context_psa *) ctx->cipher_ctx;
 
-        size_t const key_bytelen = ( (size_t) key_bitlen + 7 ) / 8;
+        size_t const key_bytelen = ((size_t) key_bitlen + 7) / 8;
 
         psa_status_t status;
         psa_key_type_t key_type;
         psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
 
         /* PSA Crypto API only accepts byte-aligned keys. */
-        if( key_bitlen % 8 != 0 )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+        if (key_bitlen % 8 != 0) {
+            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+        }
 
         /* Don't allow keys to be set multiple times. */
-        if( cipher_psa->slot_state != MBEDTLS_CIPHER_PSA_KEY_UNSET )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+        if (cipher_psa->slot_state != MBEDTLS_CIPHER_PSA_KEY_UNSET) {
+            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+        }
 
         key_type = mbedtls_psa_translate_cipher_type(
-            ctx->cipher_info->type );
-        if( key_type == 0 )
-            return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-        psa_set_key_type( &attributes, key_type );
+            ctx->cipher_info->type);
+        if (key_type == 0) {
+            return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
+        }
+        psa_set_key_type(&attributes, key_type);
 
         /* Mbed TLS' cipher layer doesn't enforce the mode of operation
          * (encrypt vs. decrypt): it is possible to setup a key for encryption
          * and use it for AEAD decryption. Until tests relying on this
          * are changed, allow any usage in PSA. */
-        psa_set_key_usage_flags( &attributes,
-                                 /* mbedtls_psa_translate_cipher_operation( operation ); */
-                                 PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT );
-        psa_set_key_algorithm( &attributes, cipher_psa->alg );
+        psa_set_key_usage_flags(&attributes,
+                                /* mbedtls_psa_translate_cipher_operation( operation ); */
+                                PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT);
+        psa_set_key_algorithm(&attributes, cipher_psa->alg);
 
-        status = psa_import_key( &attributes, key, key_bytelen,
-                                 &cipher_psa->slot );
-        switch( status )
-        {
+        status = psa_import_key(&attributes, key, key_bytelen,
+                                &cipher_psa->slot);
+        switch (status) {
             case PSA_SUCCESS:
                 break;
             case PSA_ERROR_INSUFFICIENT_MEMORY:
-                return( MBEDTLS_ERR_CIPHER_ALLOC_FAILED );
+                return MBEDTLS_ERR_CIPHER_ALLOC_FAILED;
             case PSA_ERROR_NOT_SUPPORTED:
-                return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+                return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
             default:
-                return( MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED );
+                return MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED;
         }
         /* Indicate that we own the key slot and need to
          * destroy it in mbedtls_cipher_free(). */
@@ -311,14 +324,13 @@
 
         ctx->key_bitlen = key_bitlen;
         ctx->operation = operation;
-        return( 0 );
+        return 0;
     }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
-    if( ( ctx->cipher_info->flags & MBEDTLS_CIPHER_VARIABLE_KEY_LEN ) == 0 &&
-        (int) ctx->cipher_info->key_bitlen != key_bitlen )
-    {
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    if ((ctx->cipher_info->flags & MBEDTLS_CIPHER_VARIABLE_KEY_LEN) == 0 &&
+        (int) ctx->cipher_info->key_bitlen != key_bitlen) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
     }
 
     ctx->key_bitlen = key_bitlen;
@@ -327,268 +339,258 @@
     /*
      * For OFB, CFB and CTR mode always use the encryption key schedule
      */
-    if( MBEDTLS_ENCRYPT == operation ||
+    if (MBEDTLS_ENCRYPT == operation ||
         MBEDTLS_MODE_CFB == ctx->cipher_info->mode ||
         MBEDTLS_MODE_OFB == ctx->cipher_info->mode ||
-        MBEDTLS_MODE_CTR == ctx->cipher_info->mode )
-    {
-        return( ctx->cipher_info->base->setkey_enc_func( ctx->cipher_ctx, key,
-                                                         ctx->key_bitlen ) );
+        MBEDTLS_MODE_CTR == ctx->cipher_info->mode) {
+        return ctx->cipher_info->base->setkey_enc_func(ctx->cipher_ctx, key,
+                                                       ctx->key_bitlen);
     }
 
-    if( MBEDTLS_DECRYPT == operation )
-        return( ctx->cipher_info->base->setkey_dec_func( ctx->cipher_ctx, key,
-                                                         ctx->key_bitlen ) );
+    if (MBEDTLS_DECRYPT == operation) {
+        return ctx->cipher_info->base->setkey_dec_func(ctx->cipher_ctx, key,
+                                                       ctx->key_bitlen);
+    }
 
-    return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
 }
 
-int mbedtls_cipher_set_iv( mbedtls_cipher_context_t *ctx,
-                           const unsigned char *iv,
-                           size_t iv_len )
+int mbedtls_cipher_set_iv(mbedtls_cipher_context_t *ctx,
+                          const unsigned char *iv,
+                          size_t iv_len)
 {
     size_t actual_iv_size;
 
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( iv_len == 0 || iv != NULL );
-    if( ctx->cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    CIPHER_VALIDATE_RET(ctx != NULL);
+    CIPHER_VALIDATE_RET(iv_len == 0 || iv != NULL);
+    if (ctx->cipher_info == NULL) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
+    if (ctx->psa_enabled == 1) {
         /* While PSA Crypto has an API for multipart
          * operations, we currently don't make it
          * accessible through the cipher layer. */
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
     }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
     /* avoid buffer overflow in ctx->iv */
-    if( iv_len > MBEDTLS_MAX_IV_LENGTH )
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+    if (iv_len > MBEDTLS_MAX_IV_LENGTH) {
+        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
+    }
 
-    if( ( ctx->cipher_info->flags & MBEDTLS_CIPHER_VARIABLE_IV_LEN ) != 0 )
+    if ((ctx->cipher_info->flags & MBEDTLS_CIPHER_VARIABLE_IV_LEN) != 0) {
         actual_iv_size = iv_len;
-    else
-    {
+    } else {
         actual_iv_size = ctx->cipher_info->iv_size;
 
         /* avoid reading past the end of input buffer */
-        if( actual_iv_size > iv_len )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+        if (actual_iv_size > iv_len) {
+            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+        }
     }
 
 #if defined(MBEDTLS_CHACHA20_C)
-    if ( ctx->cipher_info->type == MBEDTLS_CIPHER_CHACHA20 )
-    {
+    if (ctx->cipher_info->type == MBEDTLS_CIPHER_CHACHA20) {
         /* Even though the actual_iv_size is overwritten with a correct value
          * of 12 from the cipher info, return an error to indicate that
          * the input iv_len is wrong. */
-        if( iv_len != 12 )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+        if (iv_len != 12) {
+            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+        }
 
-        if ( 0 != mbedtls_chacha20_starts( (mbedtls_chacha20_context*)ctx->cipher_ctx,
-                                           iv,
-                                           0U ) ) /* Initial counter value */
-        {
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+        if (0 != mbedtls_chacha20_starts((mbedtls_chacha20_context *) ctx->cipher_ctx,
+                                         iv,
+                                         0U)) {   /* Initial counter value */
+            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
         }
     }
 #if defined(MBEDTLS_CHACHAPOLY_C)
-    if ( ctx->cipher_info->type == MBEDTLS_CIPHER_CHACHA20_POLY1305 &&
-         iv_len != 12 )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    if (ctx->cipher_info->type == MBEDTLS_CIPHER_CHACHA20_POLY1305 &&
+        iv_len != 12) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 #endif
 #endif
 
-    if ( actual_iv_size != 0 )
-    {
-        memcpy( ctx->iv, iv, actual_iv_size );
+    if (actual_iv_size != 0) {
+        memcpy(ctx->iv, iv, actual_iv_size);
         ctx->iv_size = actual_iv_size;
     }
 
-    return( 0 );
+    return 0;
 }
 
-int mbedtls_cipher_reset( mbedtls_cipher_context_t *ctx )
+int mbedtls_cipher_reset(mbedtls_cipher_context_t *ctx)
 {
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    if( ctx->cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    CIPHER_VALIDATE_RET(ctx != NULL);
+    if (ctx->cipher_info == NULL) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
+    if (ctx->psa_enabled == 1) {
         /* We don't support resetting PSA-based
          * cipher contexts, yet. */
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
     }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
     ctx->unprocessed_len = 0;
 
-    return( 0 );
+    return 0;
 }
 
 #if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
-int mbedtls_cipher_update_ad( mbedtls_cipher_context_t *ctx,
-                      const unsigned char *ad, size_t ad_len )
+int mbedtls_cipher_update_ad(mbedtls_cipher_context_t *ctx,
+                             const unsigned char *ad, size_t ad_len)
 {
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( ad_len == 0 || ad != NULL );
-    if( ctx->cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    CIPHER_VALIDATE_RET(ctx != NULL);
+    CIPHER_VALIDATE_RET(ad_len == 0 || ad != NULL);
+    if (ctx->cipher_info == NULL) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
+    if (ctx->psa_enabled == 1) {
         /* While PSA Crypto has an API for multipart
          * operations, we currently don't make it
          * accessible through the cipher layer. */
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
     }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
 #if defined(MBEDTLS_GCM_C)
-    if( MBEDTLS_MODE_GCM == ctx->cipher_info->mode )
-    {
-        return( mbedtls_gcm_starts( (mbedtls_gcm_context *) ctx->cipher_ctx, ctx->operation,
-                                    ctx->iv, ctx->iv_size, ad, ad_len ) );
+    if (MBEDTLS_MODE_GCM == ctx->cipher_info->mode) {
+        return mbedtls_gcm_starts((mbedtls_gcm_context *) ctx->cipher_ctx, ctx->operation,
+                                  ctx->iv, ctx->iv_size, ad, ad_len);
     }
 #endif
 
 #if defined(MBEDTLS_CHACHAPOLY_C)
-    if (MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type )
-    {
+    if (MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type) {
         int result;
         mbedtls_chachapoly_mode_t mode;
 
-        mode = ( ctx->operation == MBEDTLS_ENCRYPT )
+        mode = (ctx->operation == MBEDTLS_ENCRYPT)
                 ? MBEDTLS_CHACHAPOLY_ENCRYPT
                 : MBEDTLS_CHACHAPOLY_DECRYPT;
 
-        result = mbedtls_chachapoly_starts( (mbedtls_chachapoly_context*) ctx->cipher_ctx,
-                                                        ctx->iv,
-                                                        mode );
-        if ( result != 0 )
-            return( result );
+        result = mbedtls_chachapoly_starts((mbedtls_chachapoly_context *) ctx->cipher_ctx,
+                                           ctx->iv,
+                                           mode);
+        if (result != 0) {
+            return result;
+        }
 
-        return( mbedtls_chachapoly_update_aad( (mbedtls_chachapoly_context*) ctx->cipher_ctx,
-                                               ad, ad_len ) );
+        return mbedtls_chachapoly_update_aad((mbedtls_chachapoly_context *) ctx->cipher_ctx,
+                                             ad, ad_len);
     }
 #endif
 
-    return( 0 );
+    return 0;
 }
 #endif /* MBEDTLS_GCM_C || MBEDTLS_CHACHAPOLY_C */
 
-int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx, const unsigned char *input,
-                   size_t ilen, unsigned char *output, size_t *olen )
+int mbedtls_cipher_update(mbedtls_cipher_context_t *ctx, const unsigned char *input,
+                          size_t ilen, unsigned char *output, size_t *olen)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t block_size;
 
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( ilen == 0 || input != NULL );
-    CIPHER_VALIDATE_RET( output != NULL );
-    CIPHER_VALIDATE_RET( olen != NULL );
-    if( ctx->cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    CIPHER_VALIDATE_RET(ctx != NULL);
+    CIPHER_VALIDATE_RET(ilen == 0 || input != NULL);
+    CIPHER_VALIDATE_RET(output != NULL);
+    CIPHER_VALIDATE_RET(olen != NULL);
+    if (ctx->cipher_info == NULL) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
+    if (ctx->psa_enabled == 1) {
         /* While PSA Crypto has an API for multipart
          * operations, we currently don't make it
          * accessible through the cipher layer. */
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
     }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
     *olen = 0;
-    block_size = mbedtls_cipher_get_block_size( ctx );
-    if ( 0 == block_size )
-    {
-        return( MBEDTLS_ERR_CIPHER_INVALID_CONTEXT );
+    block_size = mbedtls_cipher_get_block_size(ctx);
+    if (0 == block_size) {
+        return MBEDTLS_ERR_CIPHER_INVALID_CONTEXT;
     }
 
-    if( ctx->cipher_info->mode == MBEDTLS_MODE_ECB )
-    {
-        if( ilen != block_size )
-            return( MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED );
+    if (ctx->cipher_info->mode == MBEDTLS_MODE_ECB) {
+        if (ilen != block_size) {
+            return MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED;
+        }
 
         *olen = ilen;
 
-        if( 0 != ( ret = ctx->cipher_info->base->ecb_func( ctx->cipher_ctx,
-                    ctx->operation, input, output ) ) )
-        {
-            return( ret );
+        if (0 != (ret = ctx->cipher_info->base->ecb_func(ctx->cipher_ctx,
+                                                         ctx->operation, input, output))) {
+            return ret;
         }
 
-        return( 0 );
+        return 0;
     }
 
 #if defined(MBEDTLS_GCM_C)
-    if( ctx->cipher_info->mode == MBEDTLS_MODE_GCM )
-    {
+    if (ctx->cipher_info->mode == MBEDTLS_MODE_GCM) {
         *olen = ilen;
-        return( mbedtls_gcm_update( (mbedtls_gcm_context *) ctx->cipher_ctx, ilen, input,
-                                    output ) );
+        return mbedtls_gcm_update((mbedtls_gcm_context *) ctx->cipher_ctx, ilen, input,
+                                  output);
     }
 #endif
 
 #if defined(MBEDTLS_CHACHAPOLY_C)
-    if ( ctx->cipher_info->type == MBEDTLS_CIPHER_CHACHA20_POLY1305 )
-    {
+    if (ctx->cipher_info->type == MBEDTLS_CIPHER_CHACHA20_POLY1305) {
         *olen = ilen;
-        return( mbedtls_chachapoly_update( (mbedtls_chachapoly_context*) ctx->cipher_ctx,
-                                           ilen, input, output ) );
+        return mbedtls_chachapoly_update((mbedtls_chachapoly_context *) ctx->cipher_ctx,
+                                         ilen, input, output);
     }
 #endif
 
-    if( input == output &&
-       ( ctx->unprocessed_len != 0 || ilen % block_size ) )
-    {
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    if (input == output &&
+        (ctx->unprocessed_len != 0 || ilen % block_size)) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
     }
 
 #if defined(MBEDTLS_CIPHER_MODE_CBC)
-    if( ctx->cipher_info->mode == MBEDTLS_MODE_CBC )
-    {
+    if (ctx->cipher_info->mode == MBEDTLS_MODE_CBC) {
         size_t copy_len = 0;
 
         /*
          * If there is not enough data for a full block, cache it.
          */
-        if( ( ctx->operation == MBEDTLS_DECRYPT && NULL != ctx->add_padding &&
-                ilen <= block_size - ctx->unprocessed_len ) ||
-            ( ctx->operation == MBEDTLS_DECRYPT && NULL == ctx->add_padding &&
-                ilen < block_size - ctx->unprocessed_len ) ||
-             ( ctx->operation == MBEDTLS_ENCRYPT &&
-                ilen < block_size - ctx->unprocessed_len ) )
-        {
-            memcpy( &( ctx->unprocessed_data[ctx->unprocessed_len] ), input,
-                    ilen );
+        if ((ctx->operation == MBEDTLS_DECRYPT && NULL != ctx->add_padding &&
+             ilen <= block_size - ctx->unprocessed_len) ||
+            (ctx->operation == MBEDTLS_DECRYPT && NULL == ctx->add_padding &&
+             ilen < block_size - ctx->unprocessed_len) ||
+            (ctx->operation == MBEDTLS_ENCRYPT &&
+             ilen < block_size - ctx->unprocessed_len)) {
+            memcpy(&(ctx->unprocessed_data[ctx->unprocessed_len]), input,
+                   ilen);
 
             ctx->unprocessed_len += ilen;
-            return( 0 );
+            return 0;
         }
 
         /*
          * Process cached data first
          */
-        if( 0 != ctx->unprocessed_len )
-        {
+        if (0 != ctx->unprocessed_len) {
             copy_len = block_size - ctx->unprocessed_len;
 
-            memcpy( &( ctx->unprocessed_data[ctx->unprocessed_len] ), input,
-                    copy_len );
+            memcpy(&(ctx->unprocessed_data[ctx->unprocessed_len]), input,
+                   copy_len);
 
-            if( 0 != ( ret = ctx->cipher_info->base->cbc_func( ctx->cipher_ctx,
-                    ctx->operation, block_size, ctx->iv,
-                    ctx->unprocessed_data, output ) ) )
-            {
-                return( ret );
+            if (0 != (ret = ctx->cipher_info->base->cbc_func(ctx->cipher_ctx,
+                                                             ctx->operation, block_size, ctx->iv,
+                                                             ctx->unprocessed_data, output))) {
+                return ret;
             }
 
             *olen += block_size;
@@ -602,22 +604,20 @@
         /*
          * Cache final, incomplete block
          */
-        if( 0 != ilen )
-        {
+        if (0 != ilen) {
             /* Encryption: only cache partial blocks
              * Decryption w/ padding: always keep at least one whole block
              * Decryption w/o padding: only cache partial blocks
              */
             copy_len = ilen % block_size;
-            if( copy_len == 0 &&
+            if (copy_len == 0 &&
                 ctx->operation == MBEDTLS_DECRYPT &&
-                NULL != ctx->add_padding)
-            {
+                NULL != ctx->add_padding) {
                 copy_len = block_size;
             }
 
-            memcpy( ctx->unprocessed_data, &( input[ilen - copy_len] ),
-                    copy_len );
+            memcpy(ctx->unprocessed_data, &(input[ilen - copy_len]),
+                   copy_len);
 
             ctx->unprocessed_len += copy_len;
             ilen -= copy_len;
@@ -626,105 +626,96 @@
         /*
          * Process remaining full blocks
          */
-        if( ilen )
-        {
-            if( 0 != ( ret = ctx->cipher_info->base->cbc_func( ctx->cipher_ctx,
-                    ctx->operation, ilen, ctx->iv, input, output ) ) )
-            {
-                return( ret );
+        if (ilen) {
+            if (0 != (ret = ctx->cipher_info->base->cbc_func(ctx->cipher_ctx,
+                                                             ctx->operation, ilen, ctx->iv, input,
+                                                             output))) {
+                return ret;
             }
 
             *olen += ilen;
         }
 
-        return( 0 );
+        return 0;
     }
 #endif /* MBEDTLS_CIPHER_MODE_CBC */
 
 #if defined(MBEDTLS_CIPHER_MODE_CFB)
-    if( ctx->cipher_info->mode == MBEDTLS_MODE_CFB )
-    {
-        if( 0 != ( ret = ctx->cipher_info->base->cfb_func( ctx->cipher_ctx,
-                ctx->operation, ilen, &ctx->unprocessed_len, ctx->iv,
-                input, output ) ) )
-        {
-            return( ret );
+    if (ctx->cipher_info->mode == MBEDTLS_MODE_CFB) {
+        if (0 != (ret = ctx->cipher_info->base->cfb_func(ctx->cipher_ctx,
+                                                         ctx->operation, ilen,
+                                                         &ctx->unprocessed_len, ctx->iv,
+                                                         input, output))) {
+            return ret;
         }
 
         *olen = ilen;
 
-        return( 0 );
+        return 0;
     }
 #endif /* MBEDTLS_CIPHER_MODE_CFB */
 
 #if defined(MBEDTLS_CIPHER_MODE_OFB)
-    if( ctx->cipher_info->mode == MBEDTLS_MODE_OFB )
-    {
-        if( 0 != ( ret = ctx->cipher_info->base->ofb_func( ctx->cipher_ctx,
-                ilen, &ctx->unprocessed_len, ctx->iv, input, output ) ) )
-        {
-            return( ret );
+    if (ctx->cipher_info->mode == MBEDTLS_MODE_OFB) {
+        if (0 != (ret = ctx->cipher_info->base->ofb_func(ctx->cipher_ctx,
+                                                         ilen, &ctx->unprocessed_len, ctx->iv,
+                                                         input, output))) {
+            return ret;
         }
 
         *olen = ilen;
 
-        return( 0 );
+        return 0;
     }
 #endif /* MBEDTLS_CIPHER_MODE_OFB */
 
 #if defined(MBEDTLS_CIPHER_MODE_CTR)
-    if( ctx->cipher_info->mode == MBEDTLS_MODE_CTR )
-    {
-        if( 0 != ( ret = ctx->cipher_info->base->ctr_func( ctx->cipher_ctx,
-                ilen, &ctx->unprocessed_len, ctx->iv,
-                ctx->unprocessed_data, input, output ) ) )
-        {
-            return( ret );
+    if (ctx->cipher_info->mode == MBEDTLS_MODE_CTR) {
+        if (0 != (ret = ctx->cipher_info->base->ctr_func(ctx->cipher_ctx,
+                                                         ilen, &ctx->unprocessed_len, ctx->iv,
+                                                         ctx->unprocessed_data, input, output))) {
+            return ret;
         }
 
         *olen = ilen;
 
-        return( 0 );
+        return 0;
     }
 #endif /* MBEDTLS_CIPHER_MODE_CTR */
 
 #if defined(MBEDTLS_CIPHER_MODE_XTS)
-    if( ctx->cipher_info->mode == MBEDTLS_MODE_XTS )
-    {
-        if( ctx->unprocessed_len > 0 ) {
+    if (ctx->cipher_info->mode == MBEDTLS_MODE_XTS) {
+        if (ctx->unprocessed_len > 0) {
             /* We can only process an entire data unit at a time. */
-            return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+            return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
         }
 
-        ret = ctx->cipher_info->base->xts_func( ctx->cipher_ctx,
-                ctx->operation, ilen, ctx->iv, input, output );
-        if( ret != 0 )
-        {
-            return( ret );
+        ret = ctx->cipher_info->base->xts_func(ctx->cipher_ctx,
+                                               ctx->operation, ilen, ctx->iv, input, output);
+        if (ret != 0) {
+            return ret;
         }
 
         *olen = ilen;
 
-        return( 0 );
+        return 0;
     }
 #endif /* MBEDTLS_CIPHER_MODE_XTS */
 
 #if defined(MBEDTLS_CIPHER_MODE_STREAM)
-    if( ctx->cipher_info->mode == MBEDTLS_MODE_STREAM )
-    {
-        if( 0 != ( ret = ctx->cipher_info->base->stream_func( ctx->cipher_ctx,
-                                                    ilen, input, output ) ) )
-        {
-            return( ret );
+    if (ctx->cipher_info->mode == MBEDTLS_MODE_STREAM) {
+        if (0 != (ret = ctx->cipher_info->base->stream_func(ctx->cipher_ctx,
+                                                            ilen, input, output))) {
+            return ret;
         }
 
         *olen = ilen;
 
-        return( 0 );
+        return 0;
     }
 #endif /* MBEDTLS_CIPHER_MODE_STREAM */
 
-    return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+    return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
 }
 
 #if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
@@ -732,24 +723,26 @@
 /*
  * PKCS7 (and PKCS5) padding: fill with ll bytes, with ll = padding_len
  */
-static void add_pkcs_padding( unsigned char *output, size_t output_len,
-        size_t data_len )
+static void add_pkcs_padding(unsigned char *output, size_t output_len,
+                             size_t data_len)
 {
     size_t padding_len = output_len - data_len;
     unsigned char i;
 
-    for( i = 0; i < padding_len; i++ )
+    for (i = 0; i < padding_len; i++) {
         output[data_len + i] = (unsigned char) padding_len;
+    }
 }
 
-static int get_pkcs_padding( unsigned char *input, size_t input_len,
-        size_t *data_len )
+static int get_pkcs_padding(unsigned char *input, size_t input_len,
+                            size_t *data_len)
 {
     size_t i, pad_idx;
     unsigned char padding_len, bad = 0;
 
-    if( NULL == input || NULL == data_len )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    if (NULL == input || NULL == data_len) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 
     padding_len = input[input_len - 1];
     *data_len = input_len - padding_len;
@@ -761,10 +754,11 @@
     /* The number of bytes checked must be independent of padding_len,
      * so pick input_len, which is usually 8 or 16 (one block) */
     pad_idx = input_len - padding_len;
-    for( i = 0; i < input_len; i++ )
-        bad |= ( input[i] ^ padding_len ) * ( i >= pad_idx );
+    for (i = 0; i < input_len; i++) {
+        bad |= (input[i] ^ padding_len) * (i >= pad_idx);
+    }
 
-    return( MBEDTLS_ERR_CIPHER_INVALID_PADDING * ( bad != 0 ) );
+    return MBEDTLS_ERR_CIPHER_INVALID_PADDING * (bad != 0);
 }
 #endif /* MBEDTLS_CIPHER_PADDING_PKCS7 */
 
@@ -772,37 +766,38 @@
 /*
  * One and zeros padding: fill with 80 00 ... 00
  */
-static void add_one_and_zeros_padding( unsigned char *output,
-                                       size_t output_len, size_t data_len )
+static void add_one_and_zeros_padding(unsigned char *output,
+                                      size_t output_len, size_t data_len)
 {
     size_t padding_len = output_len - data_len;
     unsigned char i = 0;
 
     output[data_len] = 0x80;
-    for( i = 1; i < padding_len; i++ )
+    for (i = 1; i < padding_len; i++) {
         output[data_len + i] = 0x00;
+    }
 }
 
-static int get_one_and_zeros_padding( unsigned char *input, size_t input_len,
-                                      size_t *data_len )
+static int get_one_and_zeros_padding(unsigned char *input, size_t input_len,
+                                     size_t *data_len)
 {
     size_t i;
     unsigned char done = 0, prev_done, bad;
 
-    if( NULL == input || NULL == data_len )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    if (NULL == input || NULL == data_len) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 
     bad = 0x80;
     *data_len = 0;
-    for( i = input_len; i > 0; i-- )
-    {
+    for (i = input_len; i > 0; i--) {
         prev_done = done;
-        done |= ( input[i - 1] != 0 );
-        *data_len |= ( i - 1 ) * ( done != prev_done );
-        bad ^= input[i - 1] * ( done != prev_done );
+        done |= (input[i - 1] != 0);
+        *data_len |= (i - 1) * (done != prev_done);
+        bad ^= input[i - 1] * (done != prev_done);
     }
 
-    return( MBEDTLS_ERR_CIPHER_INVALID_PADDING * ( bad != 0 ) );
+    return MBEDTLS_ERR_CIPHER_INVALID_PADDING * (bad != 0);
 
 }
 #endif /* MBEDTLS_CIPHER_PADDING_ONE_AND_ZEROS */
@@ -811,25 +806,27 @@
 /*
  * Zeros and len padding: fill with 00 ... 00 ll, where ll is padding length
  */
-static void add_zeros_and_len_padding( unsigned char *output,
-                                       size_t output_len, size_t data_len )
+static void add_zeros_and_len_padding(unsigned char *output,
+                                      size_t output_len, size_t data_len)
 {
     size_t padding_len = output_len - data_len;
     unsigned char i = 0;
 
-    for( i = 1; i < padding_len; i++ )
+    for (i = 1; i < padding_len; i++) {
         output[data_len + i - 1] = 0x00;
+    }
     output[output_len - 1] = (unsigned char) padding_len;
 }
 
-static int get_zeros_and_len_padding( unsigned char *input, size_t input_len,
-                                      size_t *data_len )
+static int get_zeros_and_len_padding(unsigned char *input, size_t input_len,
+                                     size_t *data_len)
 {
     size_t i, pad_idx;
     unsigned char padding_len, bad = 0;
 
-    if( NULL == input || NULL == data_len )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    if (NULL == input || NULL == data_len) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 
     padding_len = input[input_len - 1];
     *data_len = input_len - padding_len;
@@ -840,10 +837,11 @@
 
     /* The number of bytes checked must be independent of padding_len */
     pad_idx = input_len - padding_len;
-    for( i = 0; i < input_len - 1; i++ )
-        bad |= input[i] * ( i >= pad_idx );
+    for (i = 0; i < input_len - 1; i++) {
+        bad |= input[i] * (i >= pad_idx);
+    }
 
-    return( MBEDTLS_ERR_CIPHER_INVALID_PADDING * ( bad != 0 ) );
+    return MBEDTLS_ERR_CIPHER_INVALID_PADDING * (bad != 0);
 }
 #endif /* MBEDTLS_CIPHER_PADDING_ZEROS_AND_LEN */
 
@@ -851,33 +849,34 @@
 /*
  * Zero padding: fill with 00 ... 00
  */
-static void add_zeros_padding( unsigned char *output,
-                               size_t output_len, size_t data_len )
+static void add_zeros_padding(unsigned char *output,
+                              size_t output_len, size_t data_len)
 {
     size_t i;
 
-    for( i = data_len; i < output_len; i++ )
+    for (i = data_len; i < output_len; i++) {
         output[i] = 0x00;
+    }
 }
 
-static int get_zeros_padding( unsigned char *input, size_t input_len,
-                              size_t *data_len )
+static int get_zeros_padding(unsigned char *input, size_t input_len,
+                             size_t *data_len)
 {
     size_t i;
     unsigned char done = 0, prev_done;
 
-    if( NULL == input || NULL == data_len )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-    *data_len = 0;
-    for( i = input_len; i > 0; i-- )
-    {
-        prev_done = done;
-        done |= ( input[i-1] != 0 );
-        *data_len |= i * ( done != prev_done );
+    if (NULL == input || NULL == data_len) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
     }
 
-    return( 0 );
+    *data_len = 0;
+    for (i = input_len; i > 0; i--) {
+        prev_done = done;
+        done |= (input[i-1] != 0);
+        *data_len |= i * (done != prev_done);
+    }
+
+    return 0;
 }
 #endif /* MBEDTLS_CIPHER_PADDING_ZEROS */
 
@@ -887,247 +886,244 @@
  * There is no add_padding function (check for NULL in mbedtls_cipher_finish)
  * but a trivial get_padding function
  */
-static int get_no_padding( unsigned char *input, size_t input_len,
-                              size_t *data_len )
+static int get_no_padding(unsigned char *input, size_t input_len,
+                          size_t *data_len)
 {
-    if( NULL == input || NULL == data_len )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    if (NULL == input || NULL == data_len) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 
     *data_len = input_len;
 
-    return( 0 );
+    return 0;
 }
 #endif /* MBEDTLS_CIPHER_MODE_WITH_PADDING */
 
-int mbedtls_cipher_finish( mbedtls_cipher_context_t *ctx,
-                   unsigned char *output, size_t *olen )
+int mbedtls_cipher_finish(mbedtls_cipher_context_t *ctx,
+                          unsigned char *output, size_t *olen)
 {
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( output != NULL );
-    CIPHER_VALIDATE_RET( olen != NULL );
-    if( ctx->cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    CIPHER_VALIDATE_RET(ctx != NULL);
+    CIPHER_VALIDATE_RET(output != NULL);
+    CIPHER_VALIDATE_RET(olen != NULL);
+    if (ctx->cipher_info == NULL) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
+    if (ctx->psa_enabled == 1) {
         /* While PSA Crypto has an API for multipart
          * operations, we currently don't make it
          * accessible through the cipher layer. */
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
     }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
     *olen = 0;
 
-    if( MBEDTLS_MODE_CFB == ctx->cipher_info->mode ||
+    if (MBEDTLS_MODE_CFB == ctx->cipher_info->mode ||
         MBEDTLS_MODE_OFB == ctx->cipher_info->mode ||
         MBEDTLS_MODE_CTR == ctx->cipher_info->mode ||
         MBEDTLS_MODE_GCM == ctx->cipher_info->mode ||
         MBEDTLS_MODE_XTS == ctx->cipher_info->mode ||
-        MBEDTLS_MODE_STREAM == ctx->cipher_info->mode )
-    {
-        return( 0 );
+        MBEDTLS_MODE_STREAM == ctx->cipher_info->mode) {
+        return 0;
     }
 
-    if ( ( MBEDTLS_CIPHER_CHACHA20          == ctx->cipher_info->type ) ||
-         ( MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type ) )
-    {
-        return( 0 );
+    if ((MBEDTLS_CIPHER_CHACHA20          == ctx->cipher_info->type) ||
+        (MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type)) {
+        return 0;
     }
 
-    if( MBEDTLS_MODE_ECB == ctx->cipher_info->mode )
-    {
-        if( ctx->unprocessed_len != 0 )
-            return( MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED );
+    if (MBEDTLS_MODE_ECB == ctx->cipher_info->mode) {
+        if (ctx->unprocessed_len != 0) {
+            return MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED;
+        }
 
-        return( 0 );
+        return 0;
     }
 
 #if defined(MBEDTLS_CIPHER_MODE_CBC)
-    if( MBEDTLS_MODE_CBC == ctx->cipher_info->mode )
-    {
+    if (MBEDTLS_MODE_CBC == ctx->cipher_info->mode) {
         int ret = 0;
 
-        if( MBEDTLS_ENCRYPT == ctx->operation )
-        {
+        if (MBEDTLS_ENCRYPT == ctx->operation) {
             /* check for 'no padding' mode */
-            if( NULL == ctx->add_padding )
-            {
-                if( 0 != ctx->unprocessed_len )
-                    return( MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED );
+            if (NULL == ctx->add_padding) {
+                if (0 != ctx->unprocessed_len) {
+                    return MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED;
+                }
 
-                return( 0 );
+                return 0;
             }
 
-            ctx->add_padding( ctx->unprocessed_data, mbedtls_cipher_get_iv_size( ctx ),
-                    ctx->unprocessed_len );
-        }
-        else if( mbedtls_cipher_get_block_size( ctx ) != ctx->unprocessed_len )
-        {
+            ctx->add_padding(ctx->unprocessed_data, mbedtls_cipher_get_iv_size(ctx),
+                             ctx->unprocessed_len);
+        } else if (mbedtls_cipher_get_block_size(ctx) != ctx->unprocessed_len) {
             /*
              * For decrypt operations, expect a full block,
              * or an empty block if no padding
              */
-            if( NULL == ctx->add_padding && 0 == ctx->unprocessed_len )
-                return( 0 );
+            if (NULL == ctx->add_padding && 0 == ctx->unprocessed_len) {
+                return 0;
+            }
 
-            return( MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED );
+            return MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED;
         }
 
         /* cipher block */
-        if( 0 != ( ret = ctx->cipher_info->base->cbc_func( ctx->cipher_ctx,
-                ctx->operation, mbedtls_cipher_get_block_size( ctx ), ctx->iv,
-                ctx->unprocessed_data, output ) ) )
-        {
-            return( ret );
+        if (0 != (ret = ctx->cipher_info->base->cbc_func(ctx->cipher_ctx,
+                                                         ctx->operation,
+                                                         mbedtls_cipher_get_block_size(ctx),
+                                                         ctx->iv,
+                                                         ctx->unprocessed_data, output))) {
+            return ret;
         }
 
         /* Set output size for decryption */
-        if( MBEDTLS_DECRYPT == ctx->operation )
-            return( ctx->get_padding( output, mbedtls_cipher_get_block_size( ctx ),
-                                      olen ) );
+        if (MBEDTLS_DECRYPT == ctx->operation) {
+            return ctx->get_padding(output, mbedtls_cipher_get_block_size(ctx),
+                                    olen);
+        }
 
         /* Set output size for encryption */
-        *olen = mbedtls_cipher_get_block_size( ctx );
-        return( 0 );
+        *olen = mbedtls_cipher_get_block_size(ctx);
+        return 0;
     }
 #else
     ((void) output);
 #endif /* MBEDTLS_CIPHER_MODE_CBC */
 
-    return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+    return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
 }
 
 #if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
-int mbedtls_cipher_set_padding_mode( mbedtls_cipher_context_t *ctx,
-                                     mbedtls_cipher_padding_t mode )
+int mbedtls_cipher_set_padding_mode(mbedtls_cipher_context_t *ctx,
+                                    mbedtls_cipher_padding_t mode)
 {
-    CIPHER_VALIDATE_RET( ctx != NULL );
+    CIPHER_VALIDATE_RET(ctx != NULL);
 
-    if( NULL == ctx->cipher_info || MBEDTLS_MODE_CBC != ctx->cipher_info->mode )
-    {
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    if (NULL == ctx->cipher_info || MBEDTLS_MODE_CBC != ctx->cipher_info->mode) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
     }
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
+    if (ctx->psa_enabled == 1) {
         /* While PSA Crypto knows about CBC padding
          * schemes, we currently don't make them
          * accessible through the cipher layer. */
-        if( mode != MBEDTLS_PADDING_NONE )
-            return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+        if (mode != MBEDTLS_PADDING_NONE) {
+            return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
+        }
 
-        return( 0 );
+        return 0;
     }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
-    switch( mode )
-    {
+    switch (mode) {
 #if defined(MBEDTLS_CIPHER_PADDING_PKCS7)
-    case MBEDTLS_PADDING_PKCS7:
-        ctx->add_padding = add_pkcs_padding;
-        ctx->get_padding = get_pkcs_padding;
-        break;
+        case MBEDTLS_PADDING_PKCS7:
+            ctx->add_padding = add_pkcs_padding;
+            ctx->get_padding = get_pkcs_padding;
+            break;
 #endif
 #if defined(MBEDTLS_CIPHER_PADDING_ONE_AND_ZEROS)
-    case MBEDTLS_PADDING_ONE_AND_ZEROS:
-        ctx->add_padding = add_one_and_zeros_padding;
-        ctx->get_padding = get_one_and_zeros_padding;
-        break;
+        case MBEDTLS_PADDING_ONE_AND_ZEROS:
+            ctx->add_padding = add_one_and_zeros_padding;
+            ctx->get_padding = get_one_and_zeros_padding;
+            break;
 #endif
 #if defined(MBEDTLS_CIPHER_PADDING_ZEROS_AND_LEN)
-    case MBEDTLS_PADDING_ZEROS_AND_LEN:
-        ctx->add_padding = add_zeros_and_len_padding;
-        ctx->get_padding = get_zeros_and_len_padding;
-        break;
+        case MBEDTLS_PADDING_ZEROS_AND_LEN:
+            ctx->add_padding = add_zeros_and_len_padding;
+            ctx->get_padding = get_zeros_and_len_padding;
+            break;
 #endif
 #if defined(MBEDTLS_CIPHER_PADDING_ZEROS)
-    case MBEDTLS_PADDING_ZEROS:
-        ctx->add_padding = add_zeros_padding;
-        ctx->get_padding = get_zeros_padding;
-        break;
+        case MBEDTLS_PADDING_ZEROS:
+            ctx->add_padding = add_zeros_padding;
+            ctx->get_padding = get_zeros_padding;
+            break;
 #endif
-    case MBEDTLS_PADDING_NONE:
-        ctx->add_padding = NULL;
-        ctx->get_padding = get_no_padding;
-        break;
+        case MBEDTLS_PADDING_NONE:
+            ctx->add_padding = NULL;
+            ctx->get_padding = get_no_padding;
+            break;
 
-    default:
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+        default:
+            return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
     }
 
-    return( 0 );
+    return 0;
 }
 #endif /* MBEDTLS_CIPHER_MODE_WITH_PADDING */
 
 #if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
-int mbedtls_cipher_write_tag( mbedtls_cipher_context_t *ctx,
-                      unsigned char *tag, size_t tag_len )
+int mbedtls_cipher_write_tag(mbedtls_cipher_context_t *ctx,
+                             unsigned char *tag, size_t tag_len)
 {
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( tag_len == 0 || tag != NULL );
-    if( ctx->cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    CIPHER_VALIDATE_RET(ctx != NULL);
+    CIPHER_VALIDATE_RET(tag_len == 0 || tag != NULL);
+    if (ctx->cipher_info == NULL) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 
-    if( MBEDTLS_ENCRYPT != ctx->operation )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    if (MBEDTLS_ENCRYPT != ctx->operation) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
+    if (ctx->psa_enabled == 1) {
         /* While PSA Crypto has an API for multipart
          * operations, we currently don't make it
          * accessible through the cipher layer. */
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
     }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
 #if defined(MBEDTLS_GCM_C)
-    if( MBEDTLS_MODE_GCM == ctx->cipher_info->mode )
-        return( mbedtls_gcm_finish( (mbedtls_gcm_context *) ctx->cipher_ctx,
-                                    tag, tag_len ) );
-#endif
-
-#if defined(MBEDTLS_CHACHAPOLY_C)
-    if ( MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type )
-    {
-        /* Don't allow truncated MAC for Poly1305 */
-        if ( tag_len != 16U )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-        return( mbedtls_chachapoly_finish(
-                    (mbedtls_chachapoly_context*) ctx->cipher_ctx, tag ) );
+    if (MBEDTLS_MODE_GCM == ctx->cipher_info->mode) {
+        return mbedtls_gcm_finish((mbedtls_gcm_context *) ctx->cipher_ctx,
+                                  tag, tag_len);
     }
 #endif
 
-    return( 0 );
+#if defined(MBEDTLS_CHACHAPOLY_C)
+    if (MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type) {
+        /* Don't allow truncated MAC for Poly1305 */
+        if (tag_len != 16U) {
+            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+        }
+
+        return mbedtls_chachapoly_finish(
+            (mbedtls_chachapoly_context *) ctx->cipher_ctx, tag);
+    }
+#endif
+
+    return 0;
 }
 
-int mbedtls_cipher_check_tag( mbedtls_cipher_context_t *ctx,
-                      const unsigned char *tag, size_t tag_len )
+int mbedtls_cipher_check_tag(mbedtls_cipher_context_t *ctx,
+                             const unsigned char *tag, size_t tag_len)
 {
     unsigned char check_tag[16];
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( tag_len == 0 || tag != NULL );
-    if( ctx->cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    CIPHER_VALIDATE_RET(ctx != NULL);
+    CIPHER_VALIDATE_RET(tag_len == 0 || tag != NULL);
+    if (ctx->cipher_info == NULL) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 
-    if( MBEDTLS_DECRYPT != ctx->operation )
-    {
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    if (MBEDTLS_DECRYPT != ctx->operation) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
     }
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
+    if (ctx->psa_enabled == 1) {
         /* While PSA Crypto has an API for multipart
          * operations, we currently don't make it
          * accessible through the cipher layer. */
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
     }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
@@ -1138,21 +1134,19 @@
     ret = 0;
 
 #if defined(MBEDTLS_GCM_C)
-    if( MBEDTLS_MODE_GCM == ctx->cipher_info->mode )
-    {
-        if( tag_len > sizeof( check_tag ) )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    if (MBEDTLS_MODE_GCM == ctx->cipher_info->mode) {
+        if (tag_len > sizeof(check_tag)) {
+            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+        }
 
-        if( 0 != ( ret = mbedtls_gcm_finish(
-                       (mbedtls_gcm_context *) ctx->cipher_ctx,
-                       check_tag, tag_len ) ) )
-        {
-            return( ret );
+        if (0 != (ret = mbedtls_gcm_finish(
+                      (mbedtls_gcm_context *) ctx->cipher_ctx,
+                      check_tag, tag_len))) {
+            return ret;
         }
 
         /* Check the tag in "constant-time" */
-        if( mbedtls_ct_memcmp( tag, check_tag, tag_len ) != 0 )
-        {
+        if (mbedtls_ct_memcmp(tag, check_tag, tag_len) != 0) {
             ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
             goto exit;
         }
@@ -1160,22 +1154,20 @@
 #endif /* MBEDTLS_GCM_C */
 
 #if defined(MBEDTLS_CHACHAPOLY_C)
-    if ( MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type )
-    {
+    if (MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type) {
         /* Don't allow truncated MAC for Poly1305 */
-        if ( tag_len != sizeof( check_tag ) )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+        if (tag_len != sizeof(check_tag)) {
+            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+        }
 
         ret = mbedtls_chachapoly_finish(
-            (mbedtls_chachapoly_context*) ctx->cipher_ctx, check_tag );
-        if ( ret != 0 )
-        {
-            return( ret );
+            (mbedtls_chachapoly_context *) ctx->cipher_ctx, check_tag);
+        if (ret != 0) {
+            return ret;
         }
 
         /* Check the tag in "constant-time" */
-        if( mbedtls_ct_memcmp( tag, check_tag, tag_len ) != 0 )
-        {
+        if (mbedtls_ct_memcmp(tag, check_tag, tag_len) != 0) {
             ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
             goto exit;
         }
@@ -1183,31 +1175,30 @@
 #endif /* MBEDTLS_CHACHAPOLY_C */
 
 exit:
-    mbedtls_platform_zeroize( check_tag, tag_len );
-    return( ret );
+    mbedtls_platform_zeroize(check_tag, tag_len);
+    return ret;
 }
 #endif /* MBEDTLS_GCM_C || MBEDTLS_CHACHAPOLY_C */
 
 /*
  * Packet-oriented wrapper for non-AEAD modes
  */
-int mbedtls_cipher_crypt( mbedtls_cipher_context_t *ctx,
-                  const unsigned char *iv, size_t iv_len,
-                  const unsigned char *input, size_t ilen,
-                  unsigned char *output, size_t *olen )
+int mbedtls_cipher_crypt(mbedtls_cipher_context_t *ctx,
+                         const unsigned char *iv, size_t iv_len,
+                         const unsigned char *input, size_t ilen,
+                         unsigned char *output, size_t *olen)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t finish_olen;
 
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( iv_len == 0 || iv != NULL );
-    CIPHER_VALIDATE_RET( ilen == 0 || input != NULL );
-    CIPHER_VALIDATE_RET( output != NULL );
-    CIPHER_VALIDATE_RET( olen != NULL );
+    CIPHER_VALIDATE_RET(ctx != NULL);
+    CIPHER_VALIDATE_RET(iv_len == 0 || iv != NULL);
+    CIPHER_VALIDATE_RET(ilen == 0 || input != NULL);
+    CIPHER_VALIDATE_RET(output != NULL);
+    CIPHER_VALIDATE_RET(olen != NULL);
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
+    if (ctx->psa_enabled == 1) {
         /* As in the non-PSA case, we don't check that
          * a key has been set. If not, the key slot will
          * still be in its default state of 0, which is
@@ -1220,69 +1211,73 @@
         psa_cipher_operation_t cipher_op = PSA_CIPHER_OPERATION_INIT;
         size_t part_len;
 
-        if( ctx->operation == MBEDTLS_DECRYPT )
-        {
-            status = psa_cipher_decrypt_setup( &cipher_op,
-                                               cipher_psa->slot,
-                                               cipher_psa->alg );
+        if (ctx->operation == MBEDTLS_DECRYPT) {
+            status = psa_cipher_decrypt_setup(&cipher_op,
+                                              cipher_psa->slot,
+                                              cipher_psa->alg);
+        } else if (ctx->operation == MBEDTLS_ENCRYPT) {
+            status = psa_cipher_encrypt_setup(&cipher_op,
+                                              cipher_psa->slot,
+                                              cipher_psa->alg);
+        } else {
+            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
         }
-        else if( ctx->operation == MBEDTLS_ENCRYPT )
-        {
-            status = psa_cipher_encrypt_setup( &cipher_op,
-                                               cipher_psa->slot,
-                                               cipher_psa->alg );
-        }
-        else
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
 
         /* In the following, we can immediately return on an error,
          * because the PSA Crypto API guarantees that cipher operations
          * are terminated by unsuccessful calls to psa_cipher_update(),
          * and by any call to psa_cipher_finish(). */
-        if( status != PSA_SUCCESS )
-            return( MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED );
-
-        if( ctx->cipher_info->mode != MBEDTLS_MODE_ECB )
-        {
-            status = psa_cipher_set_iv( &cipher_op, iv, iv_len );
-            if( status != PSA_SUCCESS )
-                return( MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED );
+        if (status != PSA_SUCCESS) {
+            return MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED;
         }
 
-        status = psa_cipher_update( &cipher_op,
-                                    input, ilen,
-                                    output, ilen, olen );
-        if( status != PSA_SUCCESS )
-            return( MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED );
+        if (ctx->cipher_info->mode != MBEDTLS_MODE_ECB) {
+            status = psa_cipher_set_iv(&cipher_op, iv, iv_len);
+            if (status != PSA_SUCCESS) {
+                return MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED;
+            }
+        }
 
-        status = psa_cipher_finish( &cipher_op,
-                                    output + *olen, ilen - *olen,
-                                    &part_len );
-        if( status != PSA_SUCCESS )
-            return( MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED );
+        status = psa_cipher_update(&cipher_op,
+                                   input, ilen,
+                                   output, ilen, olen);
+        if (status != PSA_SUCCESS) {
+            return MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED;
+        }
+
+        status = psa_cipher_finish(&cipher_op,
+                                   output + *olen, ilen - *olen,
+                                   &part_len);
+        if (status != PSA_SUCCESS) {
+            return MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED;
+        }
 
         *olen += part_len;
-        return( 0 );
+        return 0;
     }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
-    if( ( ret = mbedtls_cipher_set_iv( ctx, iv, iv_len ) ) != 0 )
-        return( ret );
+    if ((ret = mbedtls_cipher_set_iv(ctx, iv, iv_len)) != 0) {
+        return ret;
+    }
 
-    if( ( ret = mbedtls_cipher_reset( ctx ) ) != 0 )
-        return( ret );
+    if ((ret = mbedtls_cipher_reset(ctx)) != 0) {
+        return ret;
+    }
 
-    if( ( ret = mbedtls_cipher_update( ctx, input, ilen,
-                                       output, olen ) ) != 0 )
-        return( ret );
+    if ((ret = mbedtls_cipher_update(ctx, input, ilen,
+                                     output, olen)) != 0) {
+        return ret;
+    }
 
-    if( ( ret = mbedtls_cipher_finish( ctx, output + *olen,
-                                       &finish_olen ) ) != 0 )
-        return( ret );
+    if ((ret = mbedtls_cipher_finish(ctx, output + *olen,
+                                     &finish_olen)) != 0) {
+        return ret;
+    }
 
     *olen += finish_olen;
 
-    return( 0 );
+    return 0;
 }
 
 #if defined(MBEDTLS_CIPHER_MODE_AEAD)
@@ -1290,16 +1285,15 @@
  * Packet-oriented encryption for AEAD modes: internal function shared by
  * mbedtls_cipher_auth_encrypt() and mbedtls_cipher_auth_encrypt_ext().
  */
-static int mbedtls_cipher_aead_encrypt( mbedtls_cipher_context_t *ctx,
-                         const unsigned char *iv, size_t iv_len,
-                         const unsigned char *ad, size_t ad_len,
-                         const unsigned char *input, size_t ilen,
-                         unsigned char *output, size_t *olen,
-                         unsigned char *tag, size_t tag_len )
+static int mbedtls_cipher_aead_encrypt(mbedtls_cipher_context_t *ctx,
+                                       const unsigned char *iv, size_t iv_len,
+                                       const unsigned char *ad, size_t ad_len,
+                                       const unsigned char *input, size_t ilen,
+                                       unsigned char *output, size_t *olen,
+                                       unsigned char *tag, size_t tag_len)
 {
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
+    if (ctx->psa_enabled == 1) {
         /* As in the non-PSA case, we don't check that
          * a key has been set. If not, the key slot will
          * still be in its default state of 0, which is
@@ -1312,74 +1306,71 @@
 
         /* PSA Crypto API always writes the authentication tag
          * at the end of the encrypted message. */
-        if( output == NULL || tag != output + ilen )
-            return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+        if (output == NULL || tag != output + ilen) {
+            return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
+        }
 
-        status = psa_aead_encrypt( cipher_psa->slot,
-                                   cipher_psa->alg,
-                                   iv, iv_len,
-                                   ad, ad_len,
-                                   input, ilen,
-                                   output, ilen + tag_len, olen );
-        if( status != PSA_SUCCESS )
-            return( MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED );
+        status = psa_aead_encrypt(cipher_psa->slot,
+                                  cipher_psa->alg,
+                                  iv, iv_len,
+                                  ad, ad_len,
+                                  input, ilen,
+                                  output, ilen + tag_len, olen);
+        if (status != PSA_SUCCESS) {
+            return MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED;
+        }
 
         *olen -= tag_len;
-        return( 0 );
+        return 0;
     }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
 #if defined(MBEDTLS_GCM_C)
-    if( MBEDTLS_MODE_GCM == ctx->cipher_info->mode )
-    {
+    if (MBEDTLS_MODE_GCM == ctx->cipher_info->mode) {
         *olen = ilen;
-        return( mbedtls_gcm_crypt_and_tag( ctx->cipher_ctx, MBEDTLS_GCM_ENCRYPT,
-                                           ilen, iv, iv_len, ad, ad_len,
-                                           input, output, tag_len, tag ) );
+        return mbedtls_gcm_crypt_and_tag(ctx->cipher_ctx, MBEDTLS_GCM_ENCRYPT,
+                                         ilen, iv, iv_len, ad, ad_len,
+                                         input, output, tag_len, tag);
     }
 #endif /* MBEDTLS_GCM_C */
 #if defined(MBEDTLS_CCM_C)
-    if( MBEDTLS_MODE_CCM == ctx->cipher_info->mode )
-    {
+    if (MBEDTLS_MODE_CCM == ctx->cipher_info->mode) {
         *olen = ilen;
-        return( mbedtls_ccm_encrypt_and_tag( ctx->cipher_ctx, ilen,
-                                     iv, iv_len, ad, ad_len, input, output,
-                                     tag, tag_len ) );
+        return mbedtls_ccm_encrypt_and_tag(ctx->cipher_ctx, ilen,
+                                           iv, iv_len, ad, ad_len, input, output,
+                                           tag, tag_len);
     }
 #endif /* MBEDTLS_CCM_C */
 #if defined(MBEDTLS_CHACHAPOLY_C)
-    if ( MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type )
-    {
+    if (MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type) {
         /* ChachaPoly has fixed length nonce and MAC (tag) */
-        if ( ( iv_len != ctx->cipher_info->iv_size ) ||
-             ( tag_len != 16U ) )
-        {
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+        if ((iv_len != ctx->cipher_info->iv_size) ||
+            (tag_len != 16U)) {
+            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
         }
 
         *olen = ilen;
-        return( mbedtls_chachapoly_encrypt_and_tag( ctx->cipher_ctx,
-                                ilen, iv, ad, ad_len, input, output, tag ) );
+        return mbedtls_chachapoly_encrypt_and_tag(ctx->cipher_ctx,
+                                                  ilen, iv, ad, ad_len, input, output, tag);
     }
 #endif /* MBEDTLS_CHACHAPOLY_C */
 
-    return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+    return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
 }
 
 /*
  * Packet-oriented encryption for AEAD modes: internal function shared by
  * mbedtls_cipher_auth_encrypt() and mbedtls_cipher_auth_encrypt_ext().
  */
-static int mbedtls_cipher_aead_decrypt( mbedtls_cipher_context_t *ctx,
-                         const unsigned char *iv, size_t iv_len,
-                         const unsigned char *ad, size_t ad_len,
-                         const unsigned char *input, size_t ilen,
-                         unsigned char *output, size_t *olen,
-                         const unsigned char *tag, size_t tag_len )
+static int mbedtls_cipher_aead_decrypt(mbedtls_cipher_context_t *ctx,
+                                       const unsigned char *iv, size_t iv_len,
+                                       const unsigned char *ad, size_t ad_len,
+                                       const unsigned char *input, size_t ilen,
+                                       unsigned char *output, size_t *olen,
+                                       const unsigned char *tag, size_t tag_len)
 {
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
+    if (ctx->psa_enabled == 1) {
         /* As in the non-PSA case, we don't check that
          * a key has been set. If not, the key slot will
          * still be in its default state of 0, which is
@@ -1392,127 +1383,128 @@
 
         /* PSA Crypto API always writes the authentication tag
          * at the end of the encrypted message. */
-        if( input == NULL || tag != input + ilen )
-            return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+        if (input == NULL || tag != input + ilen) {
+            return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
+        }
 
-        status = psa_aead_decrypt( cipher_psa->slot,
-                                   cipher_psa->alg,
-                                   iv, iv_len,
-                                   ad, ad_len,
-                                   input, ilen + tag_len,
-                                   output, ilen, olen );
-        if( status == PSA_ERROR_INVALID_SIGNATURE )
-            return( MBEDTLS_ERR_CIPHER_AUTH_FAILED );
-        else if( status != PSA_SUCCESS )
-            return( MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED );
+        status = psa_aead_decrypt(cipher_psa->slot,
+                                  cipher_psa->alg,
+                                  iv, iv_len,
+                                  ad, ad_len,
+                                  input, ilen + tag_len,
+                                  output, ilen, olen);
+        if (status == PSA_ERROR_INVALID_SIGNATURE) {
+            return MBEDTLS_ERR_CIPHER_AUTH_FAILED;
+        } else if (status != PSA_SUCCESS) {
+            return MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED;
+        }
 
-        return( 0 );
+        return 0;
     }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
 #if defined(MBEDTLS_GCM_C)
-    if( MBEDTLS_MODE_GCM == ctx->cipher_info->mode )
-    {
+    if (MBEDTLS_MODE_GCM == ctx->cipher_info->mode) {
         int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
         *olen = ilen;
-        ret = mbedtls_gcm_auth_decrypt( ctx->cipher_ctx, ilen,
-                                iv, iv_len, ad, ad_len,
-                                tag, tag_len, input, output );
+        ret = mbedtls_gcm_auth_decrypt(ctx->cipher_ctx, ilen,
+                                       iv, iv_len, ad, ad_len,
+                                       tag, tag_len, input, output);
 
-        if( ret == MBEDTLS_ERR_GCM_AUTH_FAILED )
+        if (ret == MBEDTLS_ERR_GCM_AUTH_FAILED) {
             ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
+        }
 
-        return( ret );
+        return ret;
     }
 #endif /* MBEDTLS_GCM_C */
 #if defined(MBEDTLS_CCM_C)
-    if( MBEDTLS_MODE_CCM == ctx->cipher_info->mode )
-    {
+    if (MBEDTLS_MODE_CCM == ctx->cipher_info->mode) {
         int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
         *olen = ilen;
-        ret = mbedtls_ccm_auth_decrypt( ctx->cipher_ctx, ilen,
-                                iv, iv_len, ad, ad_len,
-                                input, output, tag, tag_len );
+        ret = mbedtls_ccm_auth_decrypt(ctx->cipher_ctx, ilen,
+                                       iv, iv_len, ad, ad_len,
+                                       input, output, tag, tag_len);
 
-        if( ret == MBEDTLS_ERR_CCM_AUTH_FAILED )
+        if (ret == MBEDTLS_ERR_CCM_AUTH_FAILED) {
             ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
+        }
 
-        return( ret );
+        return ret;
     }
 #endif /* MBEDTLS_CCM_C */
 #if defined(MBEDTLS_CHACHAPOLY_C)
-    if ( MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type )
-    {
+    if (MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type) {
         int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
         /* ChachaPoly has fixed length nonce and MAC (tag) */
-        if ( ( iv_len != ctx->cipher_info->iv_size ) ||
-             ( tag_len != 16U ) )
-        {
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+        if ((iv_len != ctx->cipher_info->iv_size) ||
+            (tag_len != 16U)) {
+            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
         }
 
         *olen = ilen;
-        ret = mbedtls_chachapoly_auth_decrypt( ctx->cipher_ctx, ilen,
-                                iv, ad, ad_len, tag, input, output );
+        ret = mbedtls_chachapoly_auth_decrypt(ctx->cipher_ctx, ilen,
+                                              iv, ad, ad_len, tag, input, output);
 
-        if( ret == MBEDTLS_ERR_CHACHAPOLY_AUTH_FAILED )
+        if (ret == MBEDTLS_ERR_CHACHAPOLY_AUTH_FAILED) {
             ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
+        }
 
-        return( ret );
+        return ret;
     }
 #endif /* MBEDTLS_CHACHAPOLY_C */
 
-    return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+    return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
 }
 
 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 /*
  * Packet-oriented encryption for AEAD modes: public legacy function.
  */
-int mbedtls_cipher_auth_encrypt( mbedtls_cipher_context_t *ctx,
-                         const unsigned char *iv, size_t iv_len,
-                         const unsigned char *ad, size_t ad_len,
-                         const unsigned char *input, size_t ilen,
-                         unsigned char *output, size_t *olen,
-                         unsigned char *tag, size_t tag_len )
+int mbedtls_cipher_auth_encrypt(mbedtls_cipher_context_t *ctx,
+                                const unsigned char *iv, size_t iv_len,
+                                const unsigned char *ad, size_t ad_len,
+                                const unsigned char *input, size_t ilen,
+                                unsigned char *output, size_t *olen,
+                                unsigned char *tag, size_t tag_len)
 {
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( iv_len == 0 || iv != NULL );
-    CIPHER_VALIDATE_RET( ad_len == 0 || ad != NULL );
-    CIPHER_VALIDATE_RET( ilen == 0 || input != NULL );
-    CIPHER_VALIDATE_RET( ilen == 0 || output != NULL );
-    CIPHER_VALIDATE_RET( olen != NULL );
-    CIPHER_VALIDATE_RET( tag_len == 0 || tag != NULL );
+    CIPHER_VALIDATE_RET(ctx != NULL);
+    CIPHER_VALIDATE_RET(iv_len == 0 || iv != NULL);
+    CIPHER_VALIDATE_RET(ad_len == 0 || ad != NULL);
+    CIPHER_VALIDATE_RET(ilen == 0 || input != NULL);
+    CIPHER_VALIDATE_RET(ilen == 0 || output != NULL);
+    CIPHER_VALIDATE_RET(olen != NULL);
+    CIPHER_VALIDATE_RET(tag_len == 0 || tag != NULL);
 
-    return( mbedtls_cipher_aead_encrypt( ctx, iv, iv_len, ad, ad_len,
-                                         input, ilen, output, olen,
-                                         tag, tag_len ) );
+    return mbedtls_cipher_aead_encrypt(ctx, iv, iv_len, ad, ad_len,
+                                       input, ilen, output, olen,
+                                       tag, tag_len);
 }
 
 /*
  * Packet-oriented decryption for AEAD modes: public legacy function.
  */
-int mbedtls_cipher_auth_decrypt( mbedtls_cipher_context_t *ctx,
-                         const unsigned char *iv, size_t iv_len,
-                         const unsigned char *ad, size_t ad_len,
-                         const unsigned char *input, size_t ilen,
-                         unsigned char *output, size_t *olen,
-                         const unsigned char *tag, size_t tag_len )
+int mbedtls_cipher_auth_decrypt(mbedtls_cipher_context_t *ctx,
+                                const unsigned char *iv, size_t iv_len,
+                                const unsigned char *ad, size_t ad_len,
+                                const unsigned char *input, size_t ilen,
+                                unsigned char *output, size_t *olen,
+                                const unsigned char *tag, size_t tag_len)
 {
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( iv_len == 0 || iv != NULL );
-    CIPHER_VALIDATE_RET( ad_len == 0 || ad != NULL );
-    CIPHER_VALIDATE_RET( ilen == 0 || input != NULL );
-    CIPHER_VALIDATE_RET( ilen == 0 || output != NULL );
-    CIPHER_VALIDATE_RET( olen != NULL );
-    CIPHER_VALIDATE_RET( tag_len == 0 || tag != NULL );
+    CIPHER_VALIDATE_RET(ctx != NULL);
+    CIPHER_VALIDATE_RET(iv_len == 0 || iv != NULL);
+    CIPHER_VALIDATE_RET(ad_len == 0 || ad != NULL);
+    CIPHER_VALIDATE_RET(ilen == 0 || input != NULL);
+    CIPHER_VALIDATE_RET(ilen == 0 || output != NULL);
+    CIPHER_VALIDATE_RET(olen != NULL);
+    CIPHER_VALIDATE_RET(tag_len == 0 || tag != NULL);
 
-    return( mbedtls_cipher_aead_decrypt( ctx, iv, iv_len, ad, ad_len,
-                                         input, ilen, output, olen,
-                                         tag, tag_len ) );
+    return mbedtls_cipher_aead_decrypt(ctx, iv, iv_len, ad, ad_len,
+                                       input, ilen, output, olen,
+                                       tag, tag_len);
 }
 #endif /* !MBEDTLS_DEPRECATED_REMOVED */
 #endif /* MBEDTLS_CIPHER_MODE_AEAD */
@@ -1521,110 +1513,112 @@
 /*
  * Packet-oriented encryption for AEAD/NIST_KW: public function.
  */
-int mbedtls_cipher_auth_encrypt_ext( mbedtls_cipher_context_t *ctx,
-                         const unsigned char *iv, size_t iv_len,
-                         const unsigned char *ad, size_t ad_len,
-                         const unsigned char *input, size_t ilen,
-                         unsigned char *output, size_t output_len,
-                         size_t *olen, size_t tag_len )
+int mbedtls_cipher_auth_encrypt_ext(mbedtls_cipher_context_t *ctx,
+                                    const unsigned char *iv, size_t iv_len,
+                                    const unsigned char *ad, size_t ad_len,
+                                    const unsigned char *input, size_t ilen,
+                                    unsigned char *output, size_t output_len,
+                                    size_t *olen, size_t tag_len)
 {
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( iv_len == 0 || iv != NULL );
-    CIPHER_VALIDATE_RET( ad_len == 0 || ad != NULL );
-    CIPHER_VALIDATE_RET( ilen == 0 || input != NULL );
-    CIPHER_VALIDATE_RET( output != NULL );
-    CIPHER_VALIDATE_RET( olen != NULL );
+    CIPHER_VALIDATE_RET(ctx != NULL);
+    CIPHER_VALIDATE_RET(iv_len == 0 || iv != NULL);
+    CIPHER_VALIDATE_RET(ad_len == 0 || ad != NULL);
+    CIPHER_VALIDATE_RET(ilen == 0 || input != NULL);
+    CIPHER_VALIDATE_RET(output != NULL);
+    CIPHER_VALIDATE_RET(olen != NULL);
 
 #if defined(MBEDTLS_NIST_KW_C)
-    if(
+    if (
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
         ctx->psa_enabled == 0 &&
 #endif
-        ( MBEDTLS_MODE_KW == ctx->cipher_info->mode ||
-          MBEDTLS_MODE_KWP == ctx->cipher_info->mode ) )
-    {
-        mbedtls_nist_kw_mode_t mode = ( MBEDTLS_MODE_KW == ctx->cipher_info->mode ) ?
-                                        MBEDTLS_KW_MODE_KW : MBEDTLS_KW_MODE_KWP;
+        (MBEDTLS_MODE_KW == ctx->cipher_info->mode ||
+         MBEDTLS_MODE_KWP == ctx->cipher_info->mode)) {
+        mbedtls_nist_kw_mode_t mode = (MBEDTLS_MODE_KW == ctx->cipher_info->mode) ?
+                                      MBEDTLS_KW_MODE_KW : MBEDTLS_KW_MODE_KWP;
 
         /* There is no iv, tag or ad associated with KW and KWP,
          * so these length should be 0 as documented. */
-        if( iv_len != 0 || tag_len != 0 || ad_len != 0 )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+        if (iv_len != 0 || tag_len != 0 || ad_len != 0) {
+            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+        }
 
         (void) iv;
         (void) ad;
 
-        return( mbedtls_nist_kw_wrap( ctx->cipher_ctx, mode, input, ilen,
-                                      output, olen, output_len ) );
+        return mbedtls_nist_kw_wrap(ctx->cipher_ctx, mode, input, ilen,
+                                    output, olen, output_len);
     }
 #endif /* MBEDTLS_NIST_KW_C */
 
 #if defined(MBEDTLS_CIPHER_MODE_AEAD)
     /* AEAD case: check length before passing on to shared function */
-    if( output_len < ilen + tag_len )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    if (output_len < ilen + tag_len) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 
-    int ret = mbedtls_cipher_aead_encrypt( ctx, iv, iv_len, ad, ad_len,
-                                       input, ilen, output, olen,
-                                       output + ilen, tag_len );
+    int ret = mbedtls_cipher_aead_encrypt(ctx, iv, iv_len, ad, ad_len,
+                                          input, ilen, output, olen,
+                                          output + ilen, tag_len);
     *olen += tag_len;
-    return( ret );
+    return ret;
 #else
-    return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+    return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
 #endif /* MBEDTLS_CIPHER_MODE_AEAD */
 }
 
 /*
  * Packet-oriented decryption for AEAD/NIST_KW: public function.
  */
-int mbedtls_cipher_auth_decrypt_ext( mbedtls_cipher_context_t *ctx,
-                         const unsigned char *iv, size_t iv_len,
-                         const unsigned char *ad, size_t ad_len,
-                         const unsigned char *input, size_t ilen,
-                         unsigned char *output, size_t output_len,
-                         size_t *olen, size_t tag_len )
+int mbedtls_cipher_auth_decrypt_ext(mbedtls_cipher_context_t *ctx,
+                                    const unsigned char *iv, size_t iv_len,
+                                    const unsigned char *ad, size_t ad_len,
+                                    const unsigned char *input, size_t ilen,
+                                    unsigned char *output, size_t output_len,
+                                    size_t *olen, size_t tag_len)
 {
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( iv_len == 0 || iv != NULL );
-    CIPHER_VALIDATE_RET( ad_len == 0 || ad != NULL );
-    CIPHER_VALIDATE_RET( ilen == 0 || input != NULL );
-    CIPHER_VALIDATE_RET( output_len == 0 || output != NULL );
-    CIPHER_VALIDATE_RET( olen != NULL );
+    CIPHER_VALIDATE_RET(ctx != NULL);
+    CIPHER_VALIDATE_RET(iv_len == 0 || iv != NULL);
+    CIPHER_VALIDATE_RET(ad_len == 0 || ad != NULL);
+    CIPHER_VALIDATE_RET(ilen == 0 || input != NULL);
+    CIPHER_VALIDATE_RET(output_len == 0 || output != NULL);
+    CIPHER_VALIDATE_RET(olen != NULL);
 
 #if defined(MBEDTLS_NIST_KW_C)
-    if(
+    if (
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
         ctx->psa_enabled == 0 &&
 #endif
-        ( MBEDTLS_MODE_KW == ctx->cipher_info->mode ||
-          MBEDTLS_MODE_KWP == ctx->cipher_info->mode ) )
-    {
-        mbedtls_nist_kw_mode_t mode = ( MBEDTLS_MODE_KW == ctx->cipher_info->mode ) ?
-                                        MBEDTLS_KW_MODE_KW : MBEDTLS_KW_MODE_KWP;
+        (MBEDTLS_MODE_KW == ctx->cipher_info->mode ||
+         MBEDTLS_MODE_KWP == ctx->cipher_info->mode)) {
+        mbedtls_nist_kw_mode_t mode = (MBEDTLS_MODE_KW == ctx->cipher_info->mode) ?
+                                      MBEDTLS_KW_MODE_KW : MBEDTLS_KW_MODE_KWP;
 
         /* There is no iv, tag or ad associated with KW and KWP,
          * so these length should be 0 as documented. */
-        if( iv_len != 0 || tag_len != 0 || ad_len != 0 )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+        if (iv_len != 0 || tag_len != 0 || ad_len != 0) {
+            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+        }
 
         (void) iv;
         (void) ad;
 
-        return( mbedtls_nist_kw_unwrap( ctx->cipher_ctx, mode, input, ilen,
-                                        output, olen, output_len ) );
+        return mbedtls_nist_kw_unwrap(ctx->cipher_ctx, mode, input, ilen,
+                                      output, olen, output_len);
     }
 #endif /* MBEDTLS_NIST_KW_C */
 
 #if defined(MBEDTLS_CIPHER_MODE_AEAD)
     /* AEAD case: check length before passing on to shared function */
-    if( ilen < tag_len || output_len < ilen - tag_len )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+    if (ilen < tag_len || output_len < ilen - tag_len) {
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+    }
 
-    return( mbedtls_cipher_aead_decrypt( ctx, iv, iv_len, ad, ad_len,
-                                         input, ilen - tag_len, output, olen,
-                                         input + ilen - tag_len, tag_len ) );
+    return mbedtls_cipher_aead_decrypt(ctx, iv, iv_len, ad, ad_len,
+                                       input, ilen - tag_len, output, olen,
+                                       input + ilen - tag_len, tag_len);
 #else
-    return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+    return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
 #endif /* MBEDTLS_CIPHER_MODE_AEAD */
 }
 #endif /* MBEDTLS_CIPHER_MODE_AEAD || MBEDTLS_NIST_KW_C */