diff --git a/library/pkparse.c b/library/pkparse.c
index b982637..990b554 100644
--- a/library/pkparse.c
+++ b/library/pkparse.c
@@ -58,98 +58,100 @@
  * A terminating null byte is always appended. It is included in the announced
  * length only if the data looks like it is PEM encoded.
  */
-int mbedtls_pk_load_file( const char *path, unsigned char **buf, size_t *n )
+int mbedtls_pk_load_file(const char *path, unsigned char **buf, size_t *n)
 {
     FILE *f;
     long size;
 
-    if( ( f = fopen( path, "rb" ) ) == NULL )
-        return( MBEDTLS_ERR_PK_FILE_IO_ERROR );
+    if ((f = fopen(path, "rb")) == NULL) {
+        return MBEDTLS_ERR_PK_FILE_IO_ERROR;
+    }
 
     /* Ensure no stdio buffering of secrets, as such buffers cannot be wiped. */
-    mbedtls_setbuf( f, NULL );
+    mbedtls_setbuf(f, NULL);
 
-    fseek( f, 0, SEEK_END );
-    if( ( size = ftell( f ) ) == -1 )
-    {
-        fclose( f );
-        return( MBEDTLS_ERR_PK_FILE_IO_ERROR );
+    fseek(f, 0, SEEK_END);
+    if ((size = ftell(f)) == -1) {
+        fclose(f);
+        return MBEDTLS_ERR_PK_FILE_IO_ERROR;
     }
-    fseek( f, 0, SEEK_SET );
+    fseek(f, 0, SEEK_SET);
 
     *n = (size_t) size;
 
-    if( *n + 1 == 0 ||
-        ( *buf = mbedtls_calloc( 1, *n + 1 ) ) == NULL )
-    {
-        fclose( f );
-        return( MBEDTLS_ERR_PK_ALLOC_FAILED );
+    if (*n + 1 == 0 ||
+        (*buf = mbedtls_calloc(1, *n + 1)) == NULL) {
+        fclose(f);
+        return MBEDTLS_ERR_PK_ALLOC_FAILED;
     }
 
-    if( fread( *buf, 1, *n, f ) != *n )
-    {
-        fclose( f );
+    if (fread(*buf, 1, *n, f) != *n) {
+        fclose(f);
 
-        mbedtls_platform_zeroize( *buf, *n );
-        mbedtls_free( *buf );
+        mbedtls_platform_zeroize(*buf, *n);
+        mbedtls_free(*buf);
 
-        return( MBEDTLS_ERR_PK_FILE_IO_ERROR );
+        return MBEDTLS_ERR_PK_FILE_IO_ERROR;
     }
 
-    fclose( f );
+    fclose(f);
 
     (*buf)[*n] = '\0';
 
-    if( strstr( (const char *) *buf, "-----BEGIN " ) != NULL )
+    if (strstr((const char *) *buf, "-----BEGIN ") != NULL) {
         ++*n;
+    }
 
-    return( 0 );
+    return 0;
 }
 
 /*
  * Load and parse a private key
  */
-int mbedtls_pk_parse_keyfile( mbedtls_pk_context *ctx,
-        const char *path, const char *pwd,
-        int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
+int mbedtls_pk_parse_keyfile(mbedtls_pk_context *ctx,
+                             const char *path, const char *pwd,
+                             int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t n;
     unsigned char *buf;
 
-    if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
-        return( ret );
+    if ((ret = mbedtls_pk_load_file(path, &buf, &n)) != 0) {
+        return ret;
+    }
 
-    if( pwd == NULL )
-        ret = mbedtls_pk_parse_key( ctx, buf, n, NULL, 0, f_rng, p_rng );
-    else
-        ret = mbedtls_pk_parse_key( ctx, buf, n,
-                (const unsigned char *) pwd, strlen( pwd ), f_rng, p_rng );
+    if (pwd == NULL) {
+        ret = mbedtls_pk_parse_key(ctx, buf, n, NULL, 0, f_rng, p_rng);
+    } else {
+        ret = mbedtls_pk_parse_key(ctx, buf, n,
+                                   (const unsigned char *) pwd, strlen(pwd), f_rng, p_rng);
+    }
 
-    mbedtls_platform_zeroize( buf, n );
-    mbedtls_free( buf );
+    mbedtls_platform_zeroize(buf, n);
+    mbedtls_free(buf);
 
-    return( ret );
+    return ret;
 }
 
 /*
  * Load and parse a public key
  */
-int mbedtls_pk_parse_public_keyfile( mbedtls_pk_context *ctx, const char *path )
+int mbedtls_pk_parse_public_keyfile(mbedtls_pk_context *ctx, const char *path)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t n;
     unsigned char *buf;
 
-    if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
-        return( ret );
+    if ((ret = mbedtls_pk_load_file(path, &buf, &n)) != 0) {
+        return ret;
+    }
 
-    ret = mbedtls_pk_parse_public_key( ctx, buf, n );
+    ret = mbedtls_pk_parse_public_key(ctx, buf, n);
 
-    mbedtls_platform_zeroize( buf, n );
-    mbedtls_free( buf );
+    mbedtls_platform_zeroize(buf, n);
+    mbedtls_free(buf);
 
-    return( ret );
+    return ret;
 }
 #endif /* MBEDTLS_FS_IO */
 
@@ -162,40 +164,40 @@
  *   -- implicitCurve   NULL
  * }
  */
-static int pk_get_ecparams( unsigned char **p, const unsigned char *end,
-                            mbedtls_asn1_buf *params )
+static int pk_get_ecparams(unsigned char **p, const unsigned char *end,
+                           mbedtls_asn1_buf *params)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    if ( end - *p < 1 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT,
-                MBEDTLS_ERR_ASN1_OUT_OF_DATA ) );
+    if (end - *p < 1) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT,
+                                 MBEDTLS_ERR_ASN1_OUT_OF_DATA);
+    }
 
     /* Tag may be either OID or SEQUENCE */
     params->tag = **p;
-    if( params->tag != MBEDTLS_ASN1_OID
+    if (params->tag != MBEDTLS_ASN1_OID
 #if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
-            && params->tag != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE )
+        && params->tag != (MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)
 #endif
-            )
-    {
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT,
-                MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) );
+        ) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT,
+                                 MBEDTLS_ERR_ASN1_UNEXPECTED_TAG);
     }
 
-    if( ( ret = mbedtls_asn1_get_tag( p, end, &params->len, params->tag ) ) != 0 )
-    {
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_tag(p, end, &params->len, params->tag)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
     }
 
     params->p = *p;
     *p += params->len;
 
-    if( *p != end )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT,
-                MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) );
+    if (*p != end) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT,
+                                 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
+    }
 
-    return( 0 );
+    return 0;
 }
 
 #if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
@@ -218,7 +220,7 @@
  *
  * We only support prime-field as field type, and ignore hash and cofactor.
  */
-static int pk_group_from_specified( const mbedtls_asn1_buf *params, mbedtls_ecp_group *grp )
+static int pk_group_from_specified(const mbedtls_asn1_buf *params, mbedtls_ecp_group *grp)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *p = params->p;
@@ -228,11 +230,13 @@
     int ver;
 
     /* SpecifiedECDomainVersion ::= INTEGER { 1, 2, 3 } */
-    if( ( ret = mbedtls_asn1_get_int( &p, end, &ver ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_int(&p, end, &ver)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
+    }
 
-    if( ver < 1 || ver > 3 )
-        return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
+    if (ver < 1 || ver > 3) {
+        return MBEDTLS_ERR_PK_KEY_INVALID_FORMAT;
+    }
 
     /*
      * FieldID { FIELD-ID:IOSet } ::= SEQUENCE { -- Finite field
@@ -240,9 +244,10 @@
      *       parameters FIELD-ID.&Type({IOSet}{@fieldType})
      * }
      */
-    if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
-            MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
-        return( ret );
+    if ((ret = mbedtls_asn1_get_tag(&p, end, &len,
+                                    MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
+        return ret;
+    }
 
     end_field = p + len;
 
@@ -254,26 +259,28 @@
      * }
      * prime-field OBJECT IDENTIFIER ::= { id-fieldType 1 }
      */
-    if( ( ret = mbedtls_asn1_get_tag( &p, end_field, &len, MBEDTLS_ASN1_OID ) ) != 0 )
-        return( ret );
+    if ((ret = mbedtls_asn1_get_tag(&p, end_field, &len, MBEDTLS_ASN1_OID)) != 0) {
+        return ret;
+    }
 
-    if( len != MBEDTLS_OID_SIZE( MBEDTLS_OID_ANSI_X9_62_PRIME_FIELD ) ||
-        memcmp( p, MBEDTLS_OID_ANSI_X9_62_PRIME_FIELD, len ) != 0 )
-    {
-        return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
+    if (len != MBEDTLS_OID_SIZE(MBEDTLS_OID_ANSI_X9_62_PRIME_FIELD) ||
+        memcmp(p, MBEDTLS_OID_ANSI_X9_62_PRIME_FIELD, len) != 0) {
+        return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
     }
 
     p += len;
 
     /* Prime-p ::= INTEGER -- Field of size p. */
-    if( ( ret = mbedtls_asn1_get_mpi( &p, end_field, &grp->P ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_mpi(&p, end_field, &grp->P)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
+    }
 
-    grp->pbits = mbedtls_mpi_bitlen( &grp->P );
+    grp->pbits = mbedtls_mpi_bitlen(&grp->P);
 
-    if( p != end_field )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT,
-                MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) );
+    if (p != end_field) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT,
+                                 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
+    }
 
     /*
      * Curve ::= SEQUENCE {
@@ -284,9 +291,10 @@
      *       -- with version equal to ecdpVer2 or ecdpVer3
      * }
      */
-    if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
-            MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
-        return( ret );
+    if ((ret = mbedtls_asn1_get_tag(&p, end, &len,
+                                    MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
+        return ret;
+    }
 
     end_curve = p + len;
 
@@ -294,51 +302,50 @@
      * FieldElement ::= OCTET STRING
      * containing an integer in the case of a prime field
      */
-    if( ( ret = mbedtls_asn1_get_tag( &p, end_curve, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 ||
-        ( ret = mbedtls_mpi_read_binary( &grp->A, p, len ) ) != 0 )
-    {
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_tag(&p, end_curve, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0 ||
+        (ret = mbedtls_mpi_read_binary(&grp->A, p, len)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
     }
 
     p += len;
 
-    if( ( ret = mbedtls_asn1_get_tag( &p, end_curve, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 ||
-        ( ret = mbedtls_mpi_read_binary( &grp->B, p, len ) ) != 0 )
-    {
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_tag(&p, end_curve, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0 ||
+        (ret = mbedtls_mpi_read_binary(&grp->B, p, len)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
     }
 
     p += len;
 
     /* Ignore seed BIT STRING OPTIONAL */
-    if( ( ret = mbedtls_asn1_get_tag( &p, end_curve, &len, MBEDTLS_ASN1_BIT_STRING ) ) == 0 )
+    if ((ret = mbedtls_asn1_get_tag(&p, end_curve, &len, MBEDTLS_ASN1_BIT_STRING)) == 0) {
         p += len;
+    }
 
-    if( p != end_curve )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT,
-                MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) );
+    if (p != end_curve) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT,
+                                 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
+    }
 
     /*
      * ECPoint ::= OCTET STRING
      */
-    if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
+    }
 
-    if( ( ret = mbedtls_ecp_point_read_binary( grp, &grp->G,
-                                      ( const unsigned char *) p, len ) ) != 0 )
-    {
+    if ((ret = mbedtls_ecp_point_read_binary(grp, &grp->G,
+                                             (const unsigned char *) p, len)) != 0) {
         /*
          * If we can't read the point because it's compressed, cheat by
          * reading only the X coordinate and the parity bit of Y.
          */
-        if( ret != MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE ||
-            ( p[0] != 0x02 && p[0] != 0x03 ) ||
-            len != mbedtls_mpi_size( &grp->P ) + 1 ||
-            mbedtls_mpi_read_binary( &grp->G.X, p + 1, len - 1 ) != 0 ||
-            mbedtls_mpi_lset( &grp->G.Y, p[0] - 2 ) != 0 ||
-            mbedtls_mpi_lset( &grp->G.Z, 1 ) != 0 )
-        {
-            return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
+        if (ret != MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE ||
+            (p[0] != 0x02 && p[0] != 0x03) ||
+            len != mbedtls_mpi_size(&grp->P) + 1 ||
+            mbedtls_mpi_read_binary(&grp->G.X, p + 1, len - 1) != 0 ||
+            mbedtls_mpi_lset(&grp->G.Y, p[0] - 2) != 0 ||
+            mbedtls_mpi_lset(&grp->G.Z, 1) != 0) {
+            return MBEDTLS_ERR_PK_KEY_INVALID_FORMAT;
         }
     }
 
@@ -347,83 +354,84 @@
     /*
      * order INTEGER
      */
-    if( ( ret = mbedtls_asn1_get_mpi( &p, end, &grp->N ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_mpi(&p, end, &grp->N)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
+    }
 
-    grp->nbits = mbedtls_mpi_bitlen( &grp->N );
+    grp->nbits = mbedtls_mpi_bitlen(&grp->N);
 
     /*
      * Allow optional elements by purposefully not enforcing p == end here.
      */
 
-    return( 0 );
+    return 0;
 }
 
 /*
  * Find the group id associated with an (almost filled) group as generated by
  * pk_group_from_specified(), or return an error if unknown.
  */
-static int pk_group_id_from_group( const mbedtls_ecp_group *grp, mbedtls_ecp_group_id *grp_id )
+static int pk_group_id_from_group(const mbedtls_ecp_group *grp, mbedtls_ecp_group_id *grp_id)
 {
     int ret = 0;
     mbedtls_ecp_group ref;
     const mbedtls_ecp_group_id *id;
 
-    mbedtls_ecp_group_init( &ref );
+    mbedtls_ecp_group_init(&ref);
 
-    for( id = mbedtls_ecp_grp_id_list(); *id != MBEDTLS_ECP_DP_NONE; id++ )
-    {
+    for (id = mbedtls_ecp_grp_id_list(); *id != MBEDTLS_ECP_DP_NONE; id++) {
         /* Load the group associated to that id */
-        mbedtls_ecp_group_free( &ref );
-        MBEDTLS_MPI_CHK( mbedtls_ecp_group_load( &ref, *id ) );
+        mbedtls_ecp_group_free(&ref);
+        MBEDTLS_MPI_CHK(mbedtls_ecp_group_load(&ref, *id));
 
         /* Compare to the group we were given, starting with easy tests */
-        if( grp->pbits == ref.pbits && grp->nbits == ref.nbits &&
-            mbedtls_mpi_cmp_mpi( &grp->P, &ref.P ) == 0 &&
-            mbedtls_mpi_cmp_mpi( &grp->A, &ref.A ) == 0 &&
-            mbedtls_mpi_cmp_mpi( &grp->B, &ref.B ) == 0 &&
-            mbedtls_mpi_cmp_mpi( &grp->N, &ref.N ) == 0 &&
-            mbedtls_mpi_cmp_mpi( &grp->G.X, &ref.G.X ) == 0 &&
-            mbedtls_mpi_cmp_mpi( &grp->G.Z, &ref.G.Z ) == 0 &&
+        if (grp->pbits == ref.pbits && grp->nbits == ref.nbits &&
+            mbedtls_mpi_cmp_mpi(&grp->P, &ref.P) == 0 &&
+            mbedtls_mpi_cmp_mpi(&grp->A, &ref.A) == 0 &&
+            mbedtls_mpi_cmp_mpi(&grp->B, &ref.B) == 0 &&
+            mbedtls_mpi_cmp_mpi(&grp->N, &ref.N) == 0 &&
+            mbedtls_mpi_cmp_mpi(&grp->G.X, &ref.G.X) == 0 &&
+            mbedtls_mpi_cmp_mpi(&grp->G.Z, &ref.G.Z) == 0 &&
             /* For Y we may only know the parity bit, so compare only that */
-            mbedtls_mpi_get_bit( &grp->G.Y, 0 ) == mbedtls_mpi_get_bit( &ref.G.Y, 0 ) )
-        {
+            mbedtls_mpi_get_bit(&grp->G.Y, 0) == mbedtls_mpi_get_bit(&ref.G.Y, 0)) {
             break;
         }
 
     }
 
 cleanup:
-    mbedtls_ecp_group_free( &ref );
+    mbedtls_ecp_group_free(&ref);
 
     *grp_id = *id;
 
-    if( ret == 0 && *id == MBEDTLS_ECP_DP_NONE )
+    if (ret == 0 && *id == MBEDTLS_ECP_DP_NONE) {
         ret = MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE;
+    }
 
-    return( ret );
+    return ret;
 }
 
 /*
  * Parse a SpecifiedECDomain (SEC 1 C.2) and find the associated group ID
  */
-static int pk_group_id_from_specified( const mbedtls_asn1_buf *params,
-                                       mbedtls_ecp_group_id *grp_id )
+static int pk_group_id_from_specified(const mbedtls_asn1_buf *params,
+                                      mbedtls_ecp_group_id *grp_id)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     mbedtls_ecp_group grp;
 
-    mbedtls_ecp_group_init( &grp );
+    mbedtls_ecp_group_init(&grp);
 
-    if( ( ret = pk_group_from_specified( params, &grp ) ) != 0 )
+    if ((ret = pk_group_from_specified(params, &grp)) != 0) {
         goto cleanup;
+    }
 
-    ret = pk_group_id_from_group( &grp, grp_id );
+    ret = pk_group_id_from_group(&grp, grp_id);
 
 cleanup:
-    mbedtls_ecp_group_free( &grp );
+    mbedtls_ecp_group_free(&grp);
 
-    return( ret );
+    return ret;
 }
 #endif /* MBEDTLS_PK_PARSE_EC_EXTENDED */
 
@@ -435,36 +443,37 @@
  *   specifiedCurve     SpecifiedECDomain -- = SEQUENCE { ... }
  *   -- implicitCurve   NULL
  */
-static int pk_use_ecparams( const mbedtls_asn1_buf *params, mbedtls_ecp_group *grp )
+static int pk_use_ecparams(const mbedtls_asn1_buf *params, mbedtls_ecp_group *grp)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     mbedtls_ecp_group_id grp_id;
 
-    if( params->tag == MBEDTLS_ASN1_OID )
-    {
-        if( mbedtls_oid_get_ec_grp( params, &grp_id ) != 0 )
-            return( MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE );
-    }
-    else
-    {
+    if (params->tag == MBEDTLS_ASN1_OID) {
+        if (mbedtls_oid_get_ec_grp(params, &grp_id) != 0) {
+            return MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE;
+        }
+    } else {
 #if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
-        if( ( ret = pk_group_id_from_specified( params, &grp_id ) ) != 0 )
-            return( ret );
+        if ((ret = pk_group_id_from_specified(params, &grp_id)) != 0) {
+            return ret;
+        }
 #else
-        return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
+        return MBEDTLS_ERR_PK_KEY_INVALID_FORMAT;
 #endif
     }
 
     /*
      * grp may already be initialized; if so, make sure IDs match
      */
-    if( grp->id != MBEDTLS_ECP_DP_NONE && grp->id != grp_id )
-        return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
+    if (grp->id != MBEDTLS_ECP_DP_NONE && grp->id != grp_id) {
+        return MBEDTLS_ERR_PK_KEY_INVALID_FORMAT;
+    }
 
-    if( ( ret = mbedtls_ecp_group_load( grp, grp_id ) ) != 0 )
-        return( ret );
+    if ((ret = mbedtls_ecp_group_load(grp, grp_id)) != 0) {
+        return ret;
+    }
 
-    return( 0 );
+    return 0;
 }
 
 /*
@@ -474,15 +483,14 @@
  * desired. Take care to pass along the possible ECP_FEATURE_UNAVAILABLE
  * return code of mbedtls_ecp_point_read_binary() and leave p in a usable state.
  */
-static int pk_get_ecpubkey( unsigned char **p, const unsigned char *end,
-                            mbedtls_ecp_keypair *key )
+static int pk_get_ecpubkey(unsigned char **p, const unsigned char *end,
+                           mbedtls_ecp_keypair *key)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    if( ( ret = mbedtls_ecp_point_read_binary( &key->grp, &key->Q,
-                    (const unsigned char *) *p, end - *p ) ) == 0 )
-    {
-        ret = mbedtls_ecp_check_pubkey( &key->grp, &key->Q );
+    if ((ret = mbedtls_ecp_point_read_binary(&key->grp, &key->Q,
+                                             (const unsigned char *) *p, end - *p)) == 0) {
+        ret = mbedtls_ecp_check_pubkey(&key->grp, &key->Q);
     }
 
     /*
@@ -490,7 +498,7 @@
      */
     *p = (unsigned char *) end;
 
-    return( ret );
+    return ret;
 }
 #endif /* MBEDTLS_ECP_C */
 
@@ -501,52 +509,58 @@
  *      publicExponent    INTEGER   -- e
  *  }
  */
-static int pk_get_rsapubkey( unsigned char **p,
-                             const unsigned char *end,
-                             mbedtls_rsa_context *rsa )
+static int pk_get_rsapubkey(unsigned char **p,
+                            const unsigned char *end,
+                            mbedtls_rsa_context *rsa)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t len;
 
-    if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
-            MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_INVALID_PUBKEY, ret ) );
+    if ((ret = mbedtls_asn1_get_tag(p, end, &len,
+                                    MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_INVALID_PUBKEY, ret);
+    }
 
-    if( *p + len != end )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_INVALID_PUBKEY,
-                MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) );
+    if (*p + len != end) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_INVALID_PUBKEY,
+                                 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
+    }
 
     /* Import N */
-    if( ( ret = mbedtls_asn1_get_tag( p, end, &len, MBEDTLS_ASN1_INTEGER ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_INVALID_PUBKEY, ret ) );
+    if ((ret = mbedtls_asn1_get_tag(p, end, &len, MBEDTLS_ASN1_INTEGER)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_INVALID_PUBKEY, ret);
+    }
 
-    if( ( ret = mbedtls_rsa_import_raw( rsa, *p, len, NULL, 0, NULL, 0,
-                                        NULL, 0, NULL, 0 ) ) != 0 )
-        return( MBEDTLS_ERR_PK_INVALID_PUBKEY );
+    if ((ret = mbedtls_rsa_import_raw(rsa, *p, len, NULL, 0, NULL, 0,
+                                      NULL, 0, NULL, 0)) != 0) {
+        return MBEDTLS_ERR_PK_INVALID_PUBKEY;
+    }
 
     *p += len;
 
     /* Import E */
-    if( ( ret = mbedtls_asn1_get_tag( p, end, &len, MBEDTLS_ASN1_INTEGER ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_INVALID_PUBKEY, ret ) );
+    if ((ret = mbedtls_asn1_get_tag(p, end, &len, MBEDTLS_ASN1_INTEGER)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_INVALID_PUBKEY, ret);
+    }
 
-    if( ( ret = mbedtls_rsa_import_raw( rsa, NULL, 0, NULL, 0, NULL, 0,
-                                        NULL, 0, *p, len ) ) != 0 )
-        return( MBEDTLS_ERR_PK_INVALID_PUBKEY );
+    if ((ret = mbedtls_rsa_import_raw(rsa, NULL, 0, NULL, 0, NULL, 0,
+                                      NULL, 0, *p, len)) != 0) {
+        return MBEDTLS_ERR_PK_INVALID_PUBKEY;
+    }
 
     *p += len;
 
-    if( mbedtls_rsa_complete( rsa ) != 0 ||
-        mbedtls_rsa_check_pubkey( rsa ) != 0 )
-    {
-        return( MBEDTLS_ERR_PK_INVALID_PUBKEY );
+    if (mbedtls_rsa_complete(rsa) != 0 ||
+        mbedtls_rsa_check_pubkey(rsa) != 0) {
+        return MBEDTLS_ERR_PK_INVALID_PUBKEY;
     }
 
-    if( *p != end )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_INVALID_PUBKEY,
-                MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) );
+    if (*p != end) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_INVALID_PUBKEY,
+                                 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
+    }
 
-    return( 0 );
+    return 0;
 }
 #endif /* MBEDTLS_RSA_C */
 
@@ -556,32 +570,33 @@
  *       algorithm               OBJECT IDENTIFIER,
  *       parameters              ANY DEFINED BY algorithm OPTIONAL  }
  */
-static int pk_get_pk_alg( unsigned char **p,
-                          const unsigned char *end,
-                          mbedtls_pk_type_t *pk_alg, mbedtls_asn1_buf *params )
+static int pk_get_pk_alg(unsigned char **p,
+                         const unsigned char *end,
+                         mbedtls_pk_type_t *pk_alg, mbedtls_asn1_buf *params)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     mbedtls_asn1_buf alg_oid;
 
-    memset( params, 0, sizeof(mbedtls_asn1_buf) );
+    memset(params, 0, sizeof(mbedtls_asn1_buf));
 
-    if( ( ret = mbedtls_asn1_get_alg( p, end, &alg_oid, params ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_INVALID_ALG, ret ) );
+    if ((ret = mbedtls_asn1_get_alg(p, end, &alg_oid, params)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_INVALID_ALG, ret);
+    }
 
-    if( mbedtls_oid_get_pk_alg( &alg_oid, pk_alg ) != 0 )
-        return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
+    if (mbedtls_oid_get_pk_alg(&alg_oid, pk_alg) != 0) {
+        return MBEDTLS_ERR_PK_UNKNOWN_PK_ALG;
+    }
 
     /*
      * No parameters with RSA (only for EC)
      */
-    if( *pk_alg == MBEDTLS_PK_RSA &&
-            ( ( params->tag != MBEDTLS_ASN1_NULL && params->tag != 0 ) ||
-                params->len != 0 ) )
-    {
-        return( MBEDTLS_ERR_PK_INVALID_ALG );
+    if (*pk_alg == MBEDTLS_PK_RSA &&
+        ((params->tag != MBEDTLS_ASN1_NULL && params->tag != 0) ||
+         params->len != 0)) {
+        return MBEDTLS_ERR_PK_INVALID_ALG;
     }
 
-    return( 0 );
+    return 0;
 }
 
 /*
@@ -589,8 +604,8 @@
  *       algorithm            AlgorithmIdentifier,
  *       subjectPublicKey     BIT STRING }
  */
-int mbedtls_pk_parse_subpubkey( unsigned char **p, const unsigned char *end,
-                        mbedtls_pk_context *pk )
+int mbedtls_pk_parse_subpubkey(unsigned char **p, const unsigned char *end,
+                               mbedtls_pk_context *pk)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t len;
@@ -598,54 +613,59 @@
     mbedtls_pk_type_t pk_alg = MBEDTLS_PK_NONE;
     const mbedtls_pk_info_t *pk_info;
 
-    if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
-                    MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
-    {
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_tag(p, end, &len,
+                                    MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
     }
 
     end = *p + len;
 
-    if( ( ret = pk_get_pk_alg( p, end, &pk_alg, &alg_params ) ) != 0 )
-        return( ret );
+    if ((ret = pk_get_pk_alg(p, end, &pk_alg, &alg_params)) != 0) {
+        return ret;
+    }
 
-    if( ( ret = mbedtls_asn1_get_bitstring_null( p, end, &len ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_INVALID_PUBKEY, ret ) );
+    if ((ret = mbedtls_asn1_get_bitstring_null(p, end, &len)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_INVALID_PUBKEY, ret);
+    }
 
-    if( *p + len != end )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_INVALID_PUBKEY,
-                MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) );
+    if (*p + len != end) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_INVALID_PUBKEY,
+                                 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
+    }
 
-    if( ( pk_info = mbedtls_pk_info_from_type( pk_alg ) ) == NULL )
-        return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
+    if ((pk_info = mbedtls_pk_info_from_type(pk_alg)) == NULL) {
+        return MBEDTLS_ERR_PK_UNKNOWN_PK_ALG;
+    }
 
-    if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 )
-        return( ret );
+    if ((ret = mbedtls_pk_setup(pk, pk_info)) != 0) {
+        return ret;
+    }
 
 #if defined(MBEDTLS_RSA_C)
-    if( pk_alg == MBEDTLS_PK_RSA )
-    {
-        ret = pk_get_rsapubkey( p, end, mbedtls_pk_rsa( *pk ) );
+    if (pk_alg == MBEDTLS_PK_RSA) {
+        ret = pk_get_rsapubkey(p, end, mbedtls_pk_rsa(*pk));
     } else
 #endif /* MBEDTLS_RSA_C */
 #if defined(MBEDTLS_ECP_C)
-    if( pk_alg == MBEDTLS_PK_ECKEY_DH || pk_alg == MBEDTLS_PK_ECKEY )
-    {
-        ret = pk_use_ecparams( &alg_params, &mbedtls_pk_ec( *pk )->grp );
-        if( ret == 0 )
-            ret = pk_get_ecpubkey( p, end, mbedtls_pk_ec( *pk ) );
+    if (pk_alg == MBEDTLS_PK_ECKEY_DH || pk_alg == MBEDTLS_PK_ECKEY) {
+        ret = pk_use_ecparams(&alg_params, &mbedtls_pk_ec(*pk)->grp);
+        if (ret == 0) {
+            ret = pk_get_ecpubkey(p, end, mbedtls_pk_ec(*pk));
+        }
     } else
 #endif /* MBEDTLS_ECP_C */
-        ret = MBEDTLS_ERR_PK_UNKNOWN_PK_ALG;
+    ret = MBEDTLS_ERR_PK_UNKNOWN_PK_ALG;
 
-    if( ret == 0 && *p != end )
-        ret = MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_INVALID_PUBKEY,
-              MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
+    if (ret == 0 && *p != end) {
+        ret = MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_INVALID_PUBKEY,
+                                MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
+    }
 
-    if( ret != 0 )
-        mbedtls_pk_free( pk );
+    if (ret != 0) {
+        mbedtls_pk_free(pk);
+    }
 
-    return( ret );
+    return ret;
 }
 
 #if defined(MBEDTLS_RSA_C)
@@ -659,35 +679,37 @@
  * Since values can't be omitted in PKCS#1, passing a zero value to
  * rsa_complete() would be incorrect, so reject zero values early.
  */
-static int asn1_get_nonzero_mpi( unsigned char **p,
-                                 const unsigned char *end,
-                                 mbedtls_mpi *X )
+static int asn1_get_nonzero_mpi(unsigned char **p,
+                                const unsigned char *end,
+                                mbedtls_mpi *X)
 {
     int ret;
 
-    ret = mbedtls_asn1_get_mpi( p, end, X );
-    if( ret != 0 )
-        return( ret );
+    ret = mbedtls_asn1_get_mpi(p, end, X);
+    if (ret != 0) {
+        return ret;
+    }
 
-    if( mbedtls_mpi_cmp_int( X, 0 ) == 0 )
-        return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
+    if (mbedtls_mpi_cmp_int(X, 0) == 0) {
+        return MBEDTLS_ERR_PK_KEY_INVALID_FORMAT;
+    }
 
-    return( 0 );
+    return 0;
 }
 
 /*
  * Parse a PKCS#1 encoded private RSA key
  */
-static int pk_parse_key_pkcs1_der( mbedtls_rsa_context *rsa,
-                                   const unsigned char *key,
-                                   size_t keylen )
+static int pk_parse_key_pkcs1_der(mbedtls_rsa_context *rsa,
+                                  const unsigned char *key,
+                                  size_t keylen)
 {
     int ret, version;
     size_t len;
     unsigned char *p, *end;
 
     mbedtls_mpi T;
-    mbedtls_mpi_init( &T );
+    mbedtls_mpi_init(&T);
 
     p = (unsigned char *) key;
     end = p + keylen;
@@ -708,87 +730,93 @@
      *      otherPrimeInfos   OtherPrimeInfos OPTIONAL
      *  }
      */
-    if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
-            MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
-    {
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_tag(&p, end, &len,
+                                    MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
     }
 
     end = p + len;
 
-    if( ( ret = mbedtls_asn1_get_int( &p, end, &version ) ) != 0 )
-    {
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_int(&p, end, &version)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
     }
 
-    if( version != 0 )
-    {
-        return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION );
+    if (version != 0) {
+        return MBEDTLS_ERR_PK_KEY_INVALID_VERSION;
     }
 
     /* Import N */
-    if( ( ret = asn1_get_nonzero_mpi( &p, end, &T ) ) != 0 ||
-        ( ret = mbedtls_rsa_import( rsa, &T, NULL, NULL,
-                                        NULL, NULL ) ) != 0 )
+    if ((ret = asn1_get_nonzero_mpi(&p, end, &T)) != 0 ||
+        (ret = mbedtls_rsa_import(rsa, &T, NULL, NULL,
+                                  NULL, NULL)) != 0) {
         goto cleanup;
+    }
 
     /* Import E */
-    if( ( ret = asn1_get_nonzero_mpi( &p, end, &T ) ) != 0 ||
-        ( ret = mbedtls_rsa_import( rsa, NULL, NULL, NULL,
-                                        NULL, &T ) ) != 0 )
+    if ((ret = asn1_get_nonzero_mpi(&p, end, &T)) != 0 ||
+        (ret = mbedtls_rsa_import(rsa, NULL, NULL, NULL,
+                                  NULL, &T)) != 0) {
         goto cleanup;
+    }
 
     /* Import D */
-    if( ( ret = asn1_get_nonzero_mpi( &p, end, &T ) ) != 0 ||
-        ( ret = mbedtls_rsa_import( rsa, NULL, NULL, NULL,
-                                        &T, NULL ) ) != 0 )
+    if ((ret = asn1_get_nonzero_mpi(&p, end, &T)) != 0 ||
+        (ret = mbedtls_rsa_import(rsa, NULL, NULL, NULL,
+                                  &T, NULL)) != 0) {
         goto cleanup;
+    }
 
     /* Import P */
-    if( ( ret = asn1_get_nonzero_mpi( &p, end, &T ) ) != 0 ||
-        ( ret = mbedtls_rsa_import( rsa, NULL, &T, NULL,
-                                        NULL, NULL ) ) != 0 )
+    if ((ret = asn1_get_nonzero_mpi(&p, end, &T)) != 0 ||
+        (ret = mbedtls_rsa_import(rsa, NULL, &T, NULL,
+                                  NULL, NULL)) != 0) {
         goto cleanup;
+    }
 
     /* Import Q */
-    if( ( ret = asn1_get_nonzero_mpi( &p, end, &T ) ) != 0 ||
-        ( ret = mbedtls_rsa_import( rsa, NULL, NULL, &T,
-                                        NULL, NULL ) ) != 0 )
+    if ((ret = asn1_get_nonzero_mpi(&p, end, &T)) != 0 ||
+        (ret = mbedtls_rsa_import(rsa, NULL, NULL, &T,
+                                  NULL, NULL)) != 0) {
         goto cleanup;
+    }
 
 #if !defined(MBEDTLS_RSA_NO_CRT) && !defined(MBEDTLS_RSA_ALT)
     /*
-    * The RSA CRT parameters DP, DQ and QP are nominally redundant, in
-    * that they can be easily recomputed from D, P and Q. However by
-    * parsing them from the PKCS1 structure it is possible to avoid
-    * recalculating them which both reduces the overhead of loading
-    * RSA private keys into memory and also avoids side channels which
-    * can arise when computing those values, since all of D, P, and Q
-    * are secret. See https://eprint.iacr.org/2020/055 for a
-    * description of one such attack.
-    */
+     * The RSA CRT parameters DP, DQ and QP are nominally redundant, in
+     * that they can be easily recomputed from D, P and Q. However by
+     * parsing them from the PKCS1 structure it is possible to avoid
+     * recalculating them which both reduces the overhead of loading
+     * RSA private keys into memory and also avoids side channels which
+     * can arise when computing those values, since all of D, P, and Q
+     * are secret. See https://eprint.iacr.org/2020/055 for a
+     * description of one such attack.
+     */
 
     /* Import DP */
-    if( ( ret = asn1_get_nonzero_mpi( &p, end, &T ) ) != 0 ||
-        ( ret = mbedtls_mpi_copy( &rsa->DP, &T ) ) != 0 )
-       goto cleanup;
+    if ((ret = asn1_get_nonzero_mpi(&p, end, &T)) != 0 ||
+        (ret = mbedtls_mpi_copy(&rsa->DP, &T)) != 0) {
+        goto cleanup;
+    }
 
     /* Import DQ */
-    if( ( ret = asn1_get_nonzero_mpi( &p, end, &T ) ) != 0 ||
-        ( ret = mbedtls_mpi_copy( &rsa->DQ, &T ) ) != 0 )
-       goto cleanup;
+    if ((ret = asn1_get_nonzero_mpi(&p, end, &T)) != 0 ||
+        (ret = mbedtls_mpi_copy(&rsa->DQ, &T)) != 0) {
+        goto cleanup;
+    }
 
     /* Import QP */
-    if( ( ret = asn1_get_nonzero_mpi( &p, end, &T ) ) != 0 ||
-        ( ret = mbedtls_mpi_copy( &rsa->QP, &T ) ) != 0 )
-       goto cleanup;
+    if ((ret = asn1_get_nonzero_mpi(&p, end, &T)) != 0 ||
+        (ret = mbedtls_mpi_copy(&rsa->QP, &T)) != 0) {
+        goto cleanup;
+    }
 
 #else
     /* Verify existence of the CRT params */
-    if( ( ret = asn1_get_nonzero_mpi( &p, end, &T ) ) != 0 ||
-        ( ret = asn1_get_nonzero_mpi( &p, end, &T ) ) != 0 ||
-        ( ret = asn1_get_nonzero_mpi( &p, end, &T ) ) != 0 )
-       goto cleanup;
+    if ((ret = asn1_get_nonzero_mpi(&p, end, &T)) != 0 ||
+        (ret = asn1_get_nonzero_mpi(&p, end, &T)) != 0 ||
+        (ret = asn1_get_nonzero_mpi(&p, end, &T)) != 0) {
+        goto cleanup;
+    }
 #endif
 
     /* rsa_complete() doesn't complete anything with the default
@@ -800,34 +828,32 @@
      * Furthermore, we also check the public part for consistency with
      * mbedtls_pk_parse_pubkey(), as it includes size minima for example.
      */
-    if( ( ret = mbedtls_rsa_complete( rsa ) ) != 0 ||
-        ( ret = mbedtls_rsa_check_pubkey( rsa ) ) != 0 )
-    {
+    if ((ret = mbedtls_rsa_complete(rsa)) != 0 ||
+        (ret = mbedtls_rsa_check_pubkey(rsa)) != 0) {
         goto cleanup;
     }
 
-    if( p != end )
-    {
-        ret = MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT,
-              MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
+    if (p != end) {
+        ret = MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT,
+                                MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
     }
 
 cleanup:
 
-    mbedtls_mpi_free( &T );
+    mbedtls_mpi_free(&T);
 
-    if( ret != 0 )
-    {
+    if (ret != 0) {
         /* Wrap error code if it's coming from a lower level */
-        if( ( ret & 0xff80 ) == 0 )
-            ret = MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret );
-        else
+        if ((ret & 0xff80) == 0) {
+            ret = MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
+        } else {
             ret = MBEDTLS_ERR_PK_KEY_INVALID_FORMAT;
+        }
 
-        mbedtls_rsa_free( rsa );
+        mbedtls_rsa_free(rsa);
     }
 
-    return( ret );
+    return ret;
 }
 #endif /* MBEDTLS_RSA_C */
 
@@ -835,9 +861,9 @@
 /*
  * Parse a SEC1 encoded private EC key
  */
-static int pk_parse_key_sec1_der( mbedtls_ecp_keypair *eck,
-        const unsigned char *key, size_t keylen,
-        int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
+static int pk_parse_key_sec1_der(mbedtls_ecp_keypair *eck,
+                                 const unsigned char *key, size_t keylen,
+                                 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     int version, pubkey_done;
@@ -857,106 +883,100 @@
      *      publicKey  [1] BIT STRING OPTIONAL
      *    }
      */
-    if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
-            MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
-    {
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_tag(&p, end, &len,
+                                    MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
     }
 
     end = p + len;
 
-    if( ( ret = mbedtls_asn1_get_int( &p, end, &version ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_int(&p, end, &version)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
+    }
 
-    if( version != 1 )
-        return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION );
+    if (version != 1) {
+        return MBEDTLS_ERR_PK_KEY_INVALID_VERSION;
+    }
 
-    if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
+    }
 
-    if( ( ret = mbedtls_mpi_read_binary( &eck->d, p, len ) ) != 0 )
-    {
-        mbedtls_ecp_keypair_free( eck );
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_mpi_read_binary(&eck->d, p, len)) != 0) {
+        mbedtls_ecp_keypair_free(eck);
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
     }
 
     p += len;
 
     pubkey_done = 0;
-    if( p != end )
-    {
+    if (p != end) {
         /*
          * Is 'parameters' present?
          */
-        if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
-                        MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 0 ) ) == 0 )
-        {
-            if( ( ret = pk_get_ecparams( &p, p + len, &params) ) != 0 ||
-                ( ret = pk_use_ecparams( &params, &eck->grp )  ) != 0 )
-            {
-                mbedtls_ecp_keypair_free( eck );
-                return( ret );
+        if ((ret = mbedtls_asn1_get_tag(&p, end, &len,
+                                        MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED |
+                                        0)) == 0) {
+            if ((ret = pk_get_ecparams(&p, p + len, &params)) != 0 ||
+                (ret = pk_use_ecparams(&params, &eck->grp)) != 0) {
+                mbedtls_ecp_keypair_free(eck);
+                return ret;
             }
-        }
-        else if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
-        {
-            mbedtls_ecp_keypair_free( eck );
-            return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+        } else if (ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG) {
+            mbedtls_ecp_keypair_free(eck);
+            return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
         }
     }
 
-    if( p != end )
-    {
+    if (p != end) {
         /*
          * Is 'publickey' present? If not, or if we can't read it (eg because it
          * is compressed), create it from the private key.
          */
-        if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
-                        MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 1 ) ) == 0 )
-        {
+        if ((ret = mbedtls_asn1_get_tag(&p, end, &len,
+                                        MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED |
+                                        1)) == 0) {
             end2 = p + len;
 
-            if( ( ret = mbedtls_asn1_get_bitstring_null( &p, end2, &len ) ) != 0 )
-                return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+            if ((ret = mbedtls_asn1_get_bitstring_null(&p, end2, &len)) != 0) {
+                return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
+            }
 
-            if( p + len != end2 )
-                return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT,
-                        MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) );
+            if (p + len != end2) {
+                return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT,
+                                         MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
+            }
 
-            if( ( ret = pk_get_ecpubkey( &p, end2, eck ) ) == 0 )
+            if ((ret = pk_get_ecpubkey(&p, end2, eck)) == 0) {
                 pubkey_done = 1;
-            else
-            {
+            } else {
                 /*
                  * The only acceptable failure mode of pk_get_ecpubkey() above
                  * is if the point format is not recognized.
                  */
-                if( ret != MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE )
-                    return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
+                if (ret != MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE) {
+                    return MBEDTLS_ERR_PK_KEY_INVALID_FORMAT;
+                }
             }
-        }
-        else if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
-        {
-            mbedtls_ecp_keypair_free( eck );
-            return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+        } else if (ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG) {
+            mbedtls_ecp_keypair_free(eck);
+            return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
         }
     }
 
-    if( ! pubkey_done &&
-        ( ret = mbedtls_ecp_mul( &eck->grp, &eck->Q, &eck->d, &eck->grp.G,
-                                 f_rng, p_rng ) ) != 0 )
-    {
-        mbedtls_ecp_keypair_free( eck );
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if (!pubkey_done &&
+        (ret = mbedtls_ecp_mul(&eck->grp, &eck->Q, &eck->d, &eck->grp.G,
+                               f_rng, p_rng)) != 0) {
+        mbedtls_ecp_keypair_free(eck);
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
     }
 
-    if( ( ret = mbedtls_ecp_check_privkey( &eck->grp, &eck->d ) ) != 0 )
-    {
-        mbedtls_ecp_keypair_free( eck );
-        return( ret );
+    if ((ret = mbedtls_ecp_check_privkey(&eck->grp, &eck->d)) != 0) {
+        mbedtls_ecp_keypair_free(eck);
+        return ret;
     }
 
-    return( 0 );
+    return 0;
 }
 #endif /* MBEDTLS_ECP_C */
 
@@ -974,9 +994,9 @@
  *
  */
 static int pk_parse_key_pkcs8_unencrypted_der(
-        mbedtls_pk_context *pk,
-        const unsigned char* key, size_t keylen,
-        int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
+    mbedtls_pk_context *pk,
+    const unsigned char *key, size_t keylen,
+    int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
 {
     int ret, version;
     size_t len;
@@ -1007,62 +1027,62 @@
      *  The PrivateKey OCTET STRING is a SEC1 ECPrivateKey
      */
 
-    if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
-            MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
-    {
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_tag(&p, end, &len,
+                                    MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
     }
 
     end = p + len;
 
-    if( ( ret = mbedtls_asn1_get_int( &p, end, &version ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
-
-    if( version != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_VERSION, ret ) );
-
-    if( ( ret = pk_get_pk_alg( &p, end, &pk_alg, &params ) ) != 0 )
-    {
-        return( ret );
+    if ((ret = mbedtls_asn1_get_int(&p, end, &version)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
     }
 
-    if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if (version != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_VERSION, ret);
+    }
 
-    if( len < 1 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT,
-                MBEDTLS_ERR_ASN1_OUT_OF_DATA ) );
+    if ((ret = pk_get_pk_alg(&p, end, &pk_alg, &params)) != 0) {
+        return ret;
+    }
 
-    if( ( pk_info = mbedtls_pk_info_from_type( pk_alg ) ) == NULL )
-        return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
+    if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
+    }
 
-    if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 )
-        return( ret );
+    if (len < 1) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT,
+                                 MBEDTLS_ERR_ASN1_OUT_OF_DATA);
+    }
+
+    if ((pk_info = mbedtls_pk_info_from_type(pk_alg)) == NULL) {
+        return MBEDTLS_ERR_PK_UNKNOWN_PK_ALG;
+    }
+
+    if ((ret = mbedtls_pk_setup(pk, pk_info)) != 0) {
+        return ret;
+    }
 
 #if defined(MBEDTLS_RSA_C)
-    if( pk_alg == MBEDTLS_PK_RSA )
-    {
-        if( ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ), p, len ) ) != 0 )
-        {
-            mbedtls_pk_free( pk );
-            return( ret );
+    if (pk_alg == MBEDTLS_PK_RSA) {
+        if ((ret = pk_parse_key_pkcs1_der(mbedtls_pk_rsa(*pk), p, len)) != 0) {
+            mbedtls_pk_free(pk);
+            return ret;
         }
     } else
 #endif /* MBEDTLS_RSA_C */
 #if defined(MBEDTLS_ECP_C)
-    if( pk_alg == MBEDTLS_PK_ECKEY || pk_alg == MBEDTLS_PK_ECKEY_DH )
-    {
-        if( ( ret = pk_use_ecparams( &params, &mbedtls_pk_ec( *pk )->grp ) ) != 0 ||
-            ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ), p, len, f_rng, p_rng ) ) != 0 )
-        {
-            mbedtls_pk_free( pk );
-            return( ret );
+    if (pk_alg == MBEDTLS_PK_ECKEY || pk_alg == MBEDTLS_PK_ECKEY_DH) {
+        if ((ret = pk_use_ecparams(&params, &mbedtls_pk_ec(*pk)->grp)) != 0 ||
+            (ret = pk_parse_key_sec1_der(mbedtls_pk_ec(*pk), p, len, f_rng, p_rng)) != 0) {
+            mbedtls_pk_free(pk);
+            return ret;
         }
     } else
 #endif /* MBEDTLS_ECP_C */
-        return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
+    return MBEDTLS_ERR_PK_UNKNOWN_PK_ALG;
 
-    return( 0 );
+    return 0;
 }
 
 /*
@@ -1076,10 +1096,10 @@
  */
 #if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
 static int pk_parse_key_pkcs8_encrypted_der(
-        mbedtls_pk_context *pk,
-        unsigned char *key, size_t keylen,
-        const unsigned char *pwd, size_t pwdlen,
-        int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
+    mbedtls_pk_context *pk,
+    unsigned char *key, size_t keylen,
+    const unsigned char *pwd, size_t pwdlen,
+    int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
 {
     int ret, decrypted = 0;
     size_t len;
@@ -1094,8 +1114,9 @@
     p = key;
     end = p + keylen;
 
-    if( pwdlen == 0 )
-        return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED );
+    if (pwdlen == 0) {
+        return MBEDTLS_ERR_PK_PASSWORD_REQUIRED;
+    }
 
     /*
      * This function parses the EncryptedPrivateKeyInfo object (PKCS#8)
@@ -1112,19 +1133,20 @@
      *  The EncryptedData OCTET STRING is a PKCS#8 PrivateKeyInfo
      *
      */
-    if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
-            MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
-    {
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_tag(&p, end, &len,
+                                    MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
     }
 
     end = p + len;
 
-    if( ( ret = mbedtls_asn1_get_alg( &p, end, &pbe_alg_oid, &pbe_params ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_alg(&p, end, &pbe_alg_oid, &pbe_params)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
+    }
 
-    if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) );
+    if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
+    }
 
     buf = p;
 
@@ -1132,56 +1154,53 @@
      * Decrypt EncryptedData with appropriate PBE
      */
 #if defined(MBEDTLS_PKCS12_C)
-    if( mbedtls_oid_get_pkcs12_pbe_alg( &pbe_alg_oid, &md_alg, &cipher_alg ) == 0 )
-    {
-        if( ( ret = mbedtls_pkcs12_pbe( &pbe_params, MBEDTLS_PKCS12_PBE_DECRYPT,
-                                cipher_alg, md_alg,
-                                pwd, pwdlen, p, len, buf ) ) != 0 )
-        {
-            if( ret == MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH )
-                return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
+    if (mbedtls_oid_get_pkcs12_pbe_alg(&pbe_alg_oid, &md_alg, &cipher_alg) == 0) {
+        if ((ret = mbedtls_pkcs12_pbe(&pbe_params, MBEDTLS_PKCS12_PBE_DECRYPT,
+                                      cipher_alg, md_alg,
+                                      pwd, pwdlen, p, len, buf)) != 0) {
+            if (ret == MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH) {
+                return MBEDTLS_ERR_PK_PASSWORD_MISMATCH;
+            }
 
-            return( ret );
+            return ret;
         }
 
         decrypted = 1;
-    }
-    else
+    } else
 #endif /* MBEDTLS_PKCS12_C */
 #if defined(MBEDTLS_PKCS5_C)
-    if( MBEDTLS_OID_CMP( MBEDTLS_OID_PKCS5_PBES2, &pbe_alg_oid ) == 0 )
-    {
-        if( ( ret = mbedtls_pkcs5_pbes2( &pbe_params, MBEDTLS_PKCS5_DECRYPT, pwd, pwdlen,
-                                  p, len, buf ) ) != 0 )
-        {
-            if( ret == MBEDTLS_ERR_PKCS5_PASSWORD_MISMATCH )
-                return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
+    if (MBEDTLS_OID_CMP(MBEDTLS_OID_PKCS5_PBES2, &pbe_alg_oid) == 0) {
+        if ((ret = mbedtls_pkcs5_pbes2(&pbe_params, MBEDTLS_PKCS5_DECRYPT, pwd, pwdlen,
+                                       p, len, buf)) != 0) {
+            if (ret == MBEDTLS_ERR_PKCS5_PASSWORD_MISMATCH) {
+                return MBEDTLS_ERR_PK_PASSWORD_MISMATCH;
+            }
 
-            return( ret );
+            return ret;
         }
 
         decrypted = 1;
-    }
-    else
+    } else
 #endif /* MBEDTLS_PKCS5_C */
     {
         ((void) pwd);
     }
 
-    if( decrypted == 0 )
-        return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
+    if (decrypted == 0) {
+        return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
+    }
 
-    return( pk_parse_key_pkcs8_unencrypted_der( pk, buf, len, f_rng, p_rng ) );
+    return pk_parse_key_pkcs8_unencrypted_der(pk, buf, len, f_rng, p_rng);
 }
 #endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
 
 /*
  * Parse a private key
  */
-int mbedtls_pk_parse_key( mbedtls_pk_context *pk,
-                  const unsigned char *key, size_t keylen,
-                  const unsigned char *pwd, size_t pwdlen,
-                  int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
+int mbedtls_pk_parse_key(mbedtls_pk_context *pk,
+                         const unsigned char *key, size_t keylen,
+                         const unsigned char *pwd, size_t pwdlen,
+                         int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     const mbedtls_pk_info_t *pk_info;
@@ -1190,119 +1209,116 @@
     mbedtls_pem_context pem;
 #endif
 
-    if( keylen == 0 )
-        return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
+    if (keylen == 0) {
+        return MBEDTLS_ERR_PK_KEY_INVALID_FORMAT;
+    }
 
 #if defined(MBEDTLS_PEM_PARSE_C)
-   mbedtls_pem_init( &pem );
+    mbedtls_pem_init(&pem);
 
 #if defined(MBEDTLS_RSA_C)
     /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
-    if( key[keylen - 1] != '\0' )
+    if (key[keylen - 1] != '\0') {
         ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
-    else
-        ret = mbedtls_pem_read_buffer( &pem,
-                               "-----BEGIN RSA PRIVATE KEY-----",
-                               "-----END RSA PRIVATE KEY-----",
-                               key, pwd, pwdlen, &len );
+    } else {
+        ret = mbedtls_pem_read_buffer(&pem,
+                                      "-----BEGIN RSA PRIVATE KEY-----",
+                                      "-----END RSA PRIVATE KEY-----",
+                                      key, pwd, pwdlen, &len);
+    }
 
-    if( ret == 0 )
-    {
-        pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_RSA );
-        if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
-            ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ),
-                                            pem.buf, pem.buflen ) ) != 0 )
-        {
-            mbedtls_pk_free( pk );
+    if (ret == 0) {
+        pk_info = mbedtls_pk_info_from_type(MBEDTLS_PK_RSA);
+        if ((ret = mbedtls_pk_setup(pk, pk_info)) != 0 ||
+            (ret = pk_parse_key_pkcs1_der(mbedtls_pk_rsa(*pk),
+                                          pem.buf, pem.buflen)) != 0) {
+            mbedtls_pk_free(pk);
         }
 
-        mbedtls_pem_free( &pem );
-        return( ret );
+        mbedtls_pem_free(&pem);
+        return ret;
+    } else if (ret == MBEDTLS_ERR_PEM_PASSWORD_MISMATCH) {
+        return MBEDTLS_ERR_PK_PASSWORD_MISMATCH;
+    } else if (ret == MBEDTLS_ERR_PEM_PASSWORD_REQUIRED) {
+        return MBEDTLS_ERR_PK_PASSWORD_REQUIRED;
+    } else if (ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT) {
+        return ret;
     }
-    else if( ret == MBEDTLS_ERR_PEM_PASSWORD_MISMATCH )
-        return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
-    else if( ret == MBEDTLS_ERR_PEM_PASSWORD_REQUIRED )
-        return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED );
-    else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
-        return( ret );
 #endif /* MBEDTLS_RSA_C */
 
 #if defined(MBEDTLS_ECP_C)
     /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
-    if( key[keylen - 1] != '\0' )
+    if (key[keylen - 1] != '\0') {
         ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
-    else
-        ret = mbedtls_pem_read_buffer( &pem,
-                               "-----BEGIN EC PRIVATE KEY-----",
-                               "-----END EC PRIVATE KEY-----",
-                               key, pwd, pwdlen, &len );
-    if( ret == 0 )
-    {
-        pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_ECKEY );
+    } else {
+        ret = mbedtls_pem_read_buffer(&pem,
+                                      "-----BEGIN EC PRIVATE KEY-----",
+                                      "-----END EC PRIVATE KEY-----",
+                                      key, pwd, pwdlen, &len);
+    }
+    if (ret == 0) {
+        pk_info = mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY);
 
-        if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
-            ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ),
-                                           pem.buf, pem.buflen,
-                                           f_rng, p_rng ) ) != 0 )
-        {
-            mbedtls_pk_free( pk );
+        if ((ret = mbedtls_pk_setup(pk, pk_info)) != 0 ||
+            (ret = pk_parse_key_sec1_der(mbedtls_pk_ec(*pk),
+                                         pem.buf, pem.buflen,
+                                         f_rng, p_rng)) != 0) {
+            mbedtls_pk_free(pk);
         }
 
-        mbedtls_pem_free( &pem );
-        return( ret );
+        mbedtls_pem_free(&pem);
+        return ret;
+    } else if (ret == MBEDTLS_ERR_PEM_PASSWORD_MISMATCH) {
+        return MBEDTLS_ERR_PK_PASSWORD_MISMATCH;
+    } else if (ret == MBEDTLS_ERR_PEM_PASSWORD_REQUIRED) {
+        return MBEDTLS_ERR_PK_PASSWORD_REQUIRED;
+    } else if (ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT) {
+        return ret;
     }
-    else if( ret == MBEDTLS_ERR_PEM_PASSWORD_MISMATCH )
-        return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
-    else if( ret == MBEDTLS_ERR_PEM_PASSWORD_REQUIRED )
-        return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED );
-    else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
-        return( ret );
 #endif /* MBEDTLS_ECP_C */
 
     /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
-    if( key[keylen - 1] != '\0' )
+    if (key[keylen - 1] != '\0') {
         ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
-    else
-        ret = mbedtls_pem_read_buffer( &pem,
-                               "-----BEGIN PRIVATE KEY-----",
-                               "-----END PRIVATE KEY-----",
-                               key, NULL, 0, &len );
-    if( ret == 0 )
-    {
-        if( ( ret = pk_parse_key_pkcs8_unencrypted_der( pk,
-                        pem.buf, pem.buflen, f_rng, p_rng ) ) != 0 )
-        {
-            mbedtls_pk_free( pk );
+    } else {
+        ret = mbedtls_pem_read_buffer(&pem,
+                                      "-----BEGIN PRIVATE KEY-----",
+                                      "-----END PRIVATE KEY-----",
+                                      key, NULL, 0, &len);
+    }
+    if (ret == 0) {
+        if ((ret = pk_parse_key_pkcs8_unencrypted_der(pk,
+                                                      pem.buf, pem.buflen, f_rng, p_rng)) != 0) {
+            mbedtls_pk_free(pk);
         }
 
-        mbedtls_pem_free( &pem );
-        return( ret );
+        mbedtls_pem_free(&pem);
+        return ret;
+    } else if (ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT) {
+        return ret;
     }
-    else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
-        return( ret );
 
 #if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
     /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
-    if( key[keylen - 1] != '\0' )
+    if (key[keylen - 1] != '\0') {
         ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
-    else
-        ret = mbedtls_pem_read_buffer( &pem,
-                               "-----BEGIN ENCRYPTED PRIVATE KEY-----",
-                               "-----END ENCRYPTED PRIVATE KEY-----",
-                               key, NULL, 0, &len );
-    if( ret == 0 )
-    {
-        if( ( ret = pk_parse_key_pkcs8_encrypted_der( pk, pem.buf, pem.buflen,
-                        pwd, pwdlen, f_rng, p_rng ) ) != 0 )
-        {
-            mbedtls_pk_free( pk );
+    } else {
+        ret = mbedtls_pem_read_buffer(&pem,
+                                      "-----BEGIN ENCRYPTED PRIVATE KEY-----",
+                                      "-----END ENCRYPTED PRIVATE KEY-----",
+                                      key, NULL, 0, &len);
+    }
+    if (ret == 0) {
+        if ((ret = pk_parse_key_pkcs8_encrypted_der(pk, pem.buf, pem.buflen,
+                                                    pwd, pwdlen, f_rng, p_rng)) != 0) {
+            mbedtls_pk_free(pk);
         }
 
-        mbedtls_pem_free( &pem );
-        return( ret );
+        mbedtls_pem_free(&pem);
+        return ret;
+    } else if (ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT) {
+        return ret;
     }
-    else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
-        return( ret );
 #endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
 #else
     ((void) pwd);
@@ -1317,65 +1333,62 @@
      * error
      */
 #if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
-    if( pwdlen != 0 )
-    {
+    if (pwdlen != 0) {
         unsigned char *key_copy;
 
-        if( ( key_copy = mbedtls_calloc( 1, keylen ) ) == NULL )
-            return( MBEDTLS_ERR_PK_ALLOC_FAILED );
+        if ((key_copy = mbedtls_calloc(1, keylen)) == NULL) {
+            return MBEDTLS_ERR_PK_ALLOC_FAILED;
+        }
 
-        memcpy( key_copy, key, keylen );
+        memcpy(key_copy, key, keylen);
 
-        ret = pk_parse_key_pkcs8_encrypted_der( pk, key_copy, keylen,
-                                                pwd, pwdlen, f_rng, p_rng );
+        ret = pk_parse_key_pkcs8_encrypted_der(pk, key_copy, keylen,
+                                               pwd, pwdlen, f_rng, p_rng);
 
-        mbedtls_platform_zeroize( key_copy, keylen );
-        mbedtls_free( key_copy );
+        mbedtls_platform_zeroize(key_copy, keylen);
+        mbedtls_free(key_copy);
     }
 
-    if( ret == 0 )
-        return( 0 );
+    if (ret == 0) {
+        return 0;
+    }
 
-    mbedtls_pk_free( pk );
-    mbedtls_pk_init( pk );
+    mbedtls_pk_free(pk);
+    mbedtls_pk_init(pk);
 
-    if( ret == MBEDTLS_ERR_PK_PASSWORD_MISMATCH )
-    {
-        return( ret );
+    if (ret == MBEDTLS_ERR_PK_PASSWORD_MISMATCH) {
+        return ret;
     }
 #endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
 
-    ret = pk_parse_key_pkcs8_unencrypted_der( pk, key, keylen, f_rng, p_rng );
-    if( ret == 0 )
-    {
-        return( 0 );
+    ret = pk_parse_key_pkcs8_unencrypted_der(pk, key, keylen, f_rng, p_rng);
+    if (ret == 0) {
+        return 0;
     }
 
-    mbedtls_pk_free( pk );
-    mbedtls_pk_init( pk );
+    mbedtls_pk_free(pk);
+    mbedtls_pk_init(pk);
 
 #if defined(MBEDTLS_RSA_C)
 
-    pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_RSA );
-    if( mbedtls_pk_setup( pk, pk_info ) == 0 &&
-        pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ), key, keylen ) == 0 )
-    {
-        return( 0 );
+    pk_info = mbedtls_pk_info_from_type(MBEDTLS_PK_RSA);
+    if (mbedtls_pk_setup(pk, pk_info) == 0 &&
+        pk_parse_key_pkcs1_der(mbedtls_pk_rsa(*pk), key, keylen) == 0) {
+        return 0;
     }
 
-    mbedtls_pk_free( pk );
-    mbedtls_pk_init( pk );
+    mbedtls_pk_free(pk);
+    mbedtls_pk_init(pk);
 #endif /* MBEDTLS_RSA_C */
 
 #if defined(MBEDTLS_ECP_C)
-    pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_ECKEY );
-    if( mbedtls_pk_setup( pk, pk_info ) == 0 &&
-        pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ),
-                               key, keylen, f_rng, p_rng ) == 0 )
-    {
-        return( 0 );
+    pk_info = mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY);
+    if (mbedtls_pk_setup(pk, pk_info) == 0 &&
+        pk_parse_key_sec1_der(mbedtls_pk_ec(*pk),
+                              key, keylen, f_rng, p_rng) == 0) {
+        return 0;
     }
-    mbedtls_pk_free( pk );
+    mbedtls_pk_free(pk);
 #endif /* MBEDTLS_ECP_C */
 
     /* If MBEDTLS_RSA_C is defined but MBEDTLS_ECP_C isn't,
@@ -1388,14 +1401,14 @@
      * also ok and in line with the mbedtls_pk_free() calls
      * on failed PEM parsing attempts. */
 
-    return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
+    return MBEDTLS_ERR_PK_KEY_INVALID_FORMAT;
 }
 
 /*
  * Parse a public key
  */
-int mbedtls_pk_parse_public_key( mbedtls_pk_context *ctx,
-                         const unsigned char *key, size_t keylen )
+int mbedtls_pk_parse_public_key(mbedtls_pk_context *ctx,
+                                const unsigned char *key, size_t keylen)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *p;
@@ -1407,102 +1420,98 @@
     mbedtls_pem_context pem;
 #endif
 
-    if( keylen == 0 )
-        return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
+    if (keylen == 0) {
+        return MBEDTLS_ERR_PK_KEY_INVALID_FORMAT;
+    }
 
 #if defined(MBEDTLS_PEM_PARSE_C)
-    mbedtls_pem_init( &pem );
+    mbedtls_pem_init(&pem);
 #if defined(MBEDTLS_RSA_C)
     /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
-    if( key[keylen - 1] != '\0' )
+    if (key[keylen - 1] != '\0') {
         ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
-    else
-        ret = mbedtls_pem_read_buffer( &pem,
-                               "-----BEGIN RSA PUBLIC KEY-----",
-                               "-----END RSA PUBLIC KEY-----",
-                               key, NULL, 0, &len );
-
-    if( ret == 0 )
-    {
-        p = pem.buf;
-        if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_RSA ) ) == NULL )
-        {
-            mbedtls_pem_free( &pem );
-            return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
-        }
-
-        if( ( ret = mbedtls_pk_setup( ctx, pk_info ) ) != 0 )
-        {
-            mbedtls_pem_free( &pem );
-            return( ret );
-        }
-
-        if ( ( ret = pk_get_rsapubkey( &p, p + pem.buflen, mbedtls_pk_rsa( *ctx ) ) ) != 0 )
-            mbedtls_pk_free( ctx );
-
-        mbedtls_pem_free( &pem );
-        return( ret );
+    } else {
+        ret = mbedtls_pem_read_buffer(&pem,
+                                      "-----BEGIN RSA PUBLIC KEY-----",
+                                      "-----END RSA PUBLIC KEY-----",
+                                      key, NULL, 0, &len);
     }
-    else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
-    {
-        mbedtls_pem_free( &pem );
-        return( ret );
+
+    if (ret == 0) {
+        p = pem.buf;
+        if ((pk_info = mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)) == NULL) {
+            mbedtls_pem_free(&pem);
+            return MBEDTLS_ERR_PK_UNKNOWN_PK_ALG;
+        }
+
+        if ((ret = mbedtls_pk_setup(ctx, pk_info)) != 0) {
+            mbedtls_pem_free(&pem);
+            return ret;
+        }
+
+        if ((ret = pk_get_rsapubkey(&p, p + pem.buflen, mbedtls_pk_rsa(*ctx))) != 0) {
+            mbedtls_pk_free(ctx);
+        }
+
+        mbedtls_pem_free(&pem);
+        return ret;
+    } else if (ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT) {
+        mbedtls_pem_free(&pem);
+        return ret;
     }
 #endif /* MBEDTLS_RSA_C */
 
     /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
-    if( key[keylen - 1] != '\0' )
+    if (key[keylen - 1] != '\0') {
         ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
-    else
-        ret = mbedtls_pem_read_buffer( &pem,
-                "-----BEGIN PUBLIC KEY-----",
-                "-----END PUBLIC KEY-----",
-                key, NULL, 0, &len );
+    } else {
+        ret = mbedtls_pem_read_buffer(&pem,
+                                      "-----BEGIN PUBLIC KEY-----",
+                                      "-----END PUBLIC KEY-----",
+                                      key, NULL, 0, &len);
+    }
 
-    if( ret == 0 )
-    {
+    if (ret == 0) {
         /*
          * Was PEM encoded
          */
         p = pem.buf;
 
-        ret = mbedtls_pk_parse_subpubkey( &p,  p + pem.buflen, ctx );
-        mbedtls_pem_free( &pem );
-        return( ret );
+        ret = mbedtls_pk_parse_subpubkey(&p,  p + pem.buflen, ctx);
+        mbedtls_pem_free(&pem);
+        return ret;
+    } else if (ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT) {
+        mbedtls_pem_free(&pem);
+        return ret;
     }
-    else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
-    {
-        mbedtls_pem_free( &pem );
-        return( ret );
-    }
-    mbedtls_pem_free( &pem );
+    mbedtls_pem_free(&pem);
 #endif /* MBEDTLS_PEM_PARSE_C */
 
 #if defined(MBEDTLS_RSA_C)
-    if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_RSA ) ) == NULL )
-        return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
-
-    if( ( ret = mbedtls_pk_setup( ctx, pk_info ) ) != 0 )
-        return( ret );
-
-    p = (unsigned char *)key;
-    ret = pk_get_rsapubkey( &p, p + keylen, mbedtls_pk_rsa( *ctx ) );
-    if( ret == 0 )
-    {
-        return( ret );
+    if ((pk_info = mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)) == NULL) {
+        return MBEDTLS_ERR_PK_UNKNOWN_PK_ALG;
     }
-    mbedtls_pk_free( ctx );
-    if( ret != ( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_INVALID_PUBKEY,
-                                    MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) ) )
-    {
-        return( ret );
+
+    if ((ret = mbedtls_pk_setup(ctx, pk_info)) != 0) {
+        return ret;
+    }
+
+    p = (unsigned char *) key;
+    ret = pk_get_rsapubkey(&p, p + keylen, mbedtls_pk_rsa(*ctx));
+    if (ret == 0) {
+        return ret;
+    }
+    mbedtls_pk_free(ctx);
+    if (ret != (MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_INVALID_PUBKEY,
+                                  MBEDTLS_ERR_ASN1_UNEXPECTED_TAG))) {
+        return ret;
     }
 #endif /* MBEDTLS_RSA_C */
     p = (unsigned char *) key;
 
-    ret = mbedtls_pk_parse_subpubkey( &p, p + keylen, ctx );
+    ret = mbedtls_pk_parse_subpubkey(&p, p + keylen, ctx);
 
-    return( ret );
+    return ret;
 }
 
 #endif /* MBEDTLS_PK_PARSE_C */