diff --git a/library/x509write_csr.c b/library/x509write_csr.c
index 707dd00..a421fde 100644
--- a/library/x509write_csr.c
+++ b/library/x509write_csr.c
@@ -46,92 +46,96 @@
 
 #include "mbedtls/platform.h"
 
-void mbedtls_x509write_csr_init( mbedtls_x509write_csr *ctx )
+void mbedtls_x509write_csr_init(mbedtls_x509write_csr *ctx)
 {
-    memset( ctx, 0, sizeof( mbedtls_x509write_csr ) );
+    memset(ctx, 0, sizeof(mbedtls_x509write_csr));
 }
 
-void mbedtls_x509write_csr_free( mbedtls_x509write_csr *ctx )
+void mbedtls_x509write_csr_free(mbedtls_x509write_csr *ctx)
 {
-    mbedtls_asn1_free_named_data_list( &ctx->subject );
-    mbedtls_asn1_free_named_data_list( &ctx->extensions );
+    mbedtls_asn1_free_named_data_list(&ctx->subject);
+    mbedtls_asn1_free_named_data_list(&ctx->extensions);
 
-    mbedtls_platform_zeroize( ctx, sizeof( mbedtls_x509write_csr ) );
+    mbedtls_platform_zeroize(ctx, sizeof(mbedtls_x509write_csr));
 }
 
-void mbedtls_x509write_csr_set_md_alg( mbedtls_x509write_csr *ctx, mbedtls_md_type_t md_alg )
+void mbedtls_x509write_csr_set_md_alg(mbedtls_x509write_csr *ctx, mbedtls_md_type_t md_alg)
 {
     ctx->md_alg = md_alg;
 }
 
-void mbedtls_x509write_csr_set_key( mbedtls_x509write_csr *ctx, mbedtls_pk_context *key )
+void mbedtls_x509write_csr_set_key(mbedtls_x509write_csr *ctx, mbedtls_pk_context *key)
 {
     ctx->key = key;
 }
 
-int mbedtls_x509write_csr_set_subject_name( mbedtls_x509write_csr *ctx,
-                                    const char *subject_name )
+int mbedtls_x509write_csr_set_subject_name(mbedtls_x509write_csr *ctx,
+                                           const char *subject_name)
 {
-    return mbedtls_x509_string_to_names( &ctx->subject, subject_name );
+    return mbedtls_x509_string_to_names(&ctx->subject, subject_name);
 }
 
-int mbedtls_x509write_csr_set_extension( mbedtls_x509write_csr *ctx,
-                                 const char *oid, size_t oid_len,
-                                 const unsigned char *val, size_t val_len )
+int mbedtls_x509write_csr_set_extension(mbedtls_x509write_csr *ctx,
+                                        const char *oid, size_t oid_len,
+                                        const unsigned char *val, size_t val_len)
 {
-    return mbedtls_x509_set_extension( &ctx->extensions, oid, oid_len,
-                               0, val, val_len );
+    return mbedtls_x509_set_extension(&ctx->extensions, oid, oid_len,
+                                      0, val, val_len);
 }
 
-int mbedtls_x509write_csr_set_key_usage( mbedtls_x509write_csr *ctx, unsigned char key_usage )
+int mbedtls_x509write_csr_set_key_usage(mbedtls_x509write_csr *ctx, unsigned char key_usage)
 {
-    unsigned char buf[4] = {0};
+    unsigned char buf[4] = { 0 };
     unsigned char *c;
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
     c = buf + 4;
 
-    ret = mbedtls_asn1_write_named_bitstring( &c, buf, &key_usage, 8 );
-    if( ret < 3 || ret > 4 )
-        return( ret );
+    ret = mbedtls_asn1_write_named_bitstring(&c, buf, &key_usage, 8);
+    if (ret < 3 || ret > 4) {
+        return ret;
+    }
 
-    ret = mbedtls_x509write_csr_set_extension( ctx, MBEDTLS_OID_KEY_USAGE,
-                                       MBEDTLS_OID_SIZE( MBEDTLS_OID_KEY_USAGE ),
-                                       c, (size_t)ret );
-    if( ret != 0 )
-        return( ret );
+    ret = mbedtls_x509write_csr_set_extension(ctx, MBEDTLS_OID_KEY_USAGE,
+                                              MBEDTLS_OID_SIZE(MBEDTLS_OID_KEY_USAGE),
+                                              c, (size_t) ret);
+    if (ret != 0) {
+        return ret;
+    }
 
-    return( 0 );
+    return 0;
 }
 
-int mbedtls_x509write_csr_set_ns_cert_type( mbedtls_x509write_csr *ctx,
-                                    unsigned char ns_cert_type )
+int mbedtls_x509write_csr_set_ns_cert_type(mbedtls_x509write_csr *ctx,
+                                           unsigned char ns_cert_type)
 {
-    unsigned char buf[4] = {0};
+    unsigned char buf[4] = { 0 };
     unsigned char *c;
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
     c = buf + 4;
 
-    ret = mbedtls_asn1_write_named_bitstring( &c, buf, &ns_cert_type, 8 );
-    if( ret < 3 || ret > 4 )
-        return( ret );
+    ret = mbedtls_asn1_write_named_bitstring(&c, buf, &ns_cert_type, 8);
+    if (ret < 3 || ret > 4) {
+        return ret;
+    }
 
-    ret = mbedtls_x509write_csr_set_extension( ctx, MBEDTLS_OID_NS_CERT_TYPE,
-                                       MBEDTLS_OID_SIZE( MBEDTLS_OID_NS_CERT_TYPE ),
-                                       c, (size_t)ret );
-    if( ret != 0 )
-        return( ret );
+    ret = mbedtls_x509write_csr_set_extension(ctx, MBEDTLS_OID_NS_CERT_TYPE,
+                                              MBEDTLS_OID_SIZE(MBEDTLS_OID_NS_CERT_TYPE),
+                                              c, (size_t) ret);
+    if (ret != 0) {
+        return ret;
+    }
 
-    return( 0 );
+    return 0;
 }
 
-static int x509write_csr_der_internal( mbedtls_x509write_csr *ctx,
-                                 unsigned char *buf,
-                                 size_t size,
-                                 unsigned char *sig,
-                                 int (*f_rng)(void *, unsigned char *, size_t),
-                                 void *p_rng )
+static int x509write_csr_der_internal(mbedtls_x509write_csr *ctx,
+                                      unsigned char *buf,
+                                      size_t size,
+                                      unsigned char *sig,
+                                      int (*f_rng)(void *, unsigned char *, size_t),
+                                      void *p_rng)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     const char *sig_oid;
@@ -144,114 +148,114 @@
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
     psa_hash_operation_t hash_operation = PSA_HASH_OPERATION_INIT;
     size_t hash_len;
-    psa_algorithm_t hash_alg = mbedtls_psa_translate_md( ctx->md_alg );
+    psa_algorithm_t hash_alg = mbedtls_psa_translate_md(ctx->md_alg);
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
     /* Write the CSR backwards starting from the end of buf */
     c = buf + size;
 
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_x509_write_extensions( &c, buf,
-                                                           ctx->extensions ) );
+    MBEDTLS_ASN1_CHK_ADD(len, mbedtls_x509_write_extensions(&c, buf,
+                                                            ctx->extensions));
 
-    if( len )
-    {
-        MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
-        MBEDTLS_ASN1_CHK_ADD( len,
-            mbedtls_asn1_write_tag(
-                &c, buf,
-                MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) );
+    if (len) {
+        MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(&c, buf, len));
+        MBEDTLS_ASN1_CHK_ADD(len,
+                             mbedtls_asn1_write_tag(
+                                 &c, buf,
+                                 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE));
 
-        MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
-        MBEDTLS_ASN1_CHK_ADD( len,
-            mbedtls_asn1_write_tag(
-                &c, buf,
-                MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SET ) );
+        MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(&c, buf, len));
+        MBEDTLS_ASN1_CHK_ADD(len,
+                             mbedtls_asn1_write_tag(
+                                 &c, buf,
+                                 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SET));
 
-        MBEDTLS_ASN1_CHK_ADD( len,
-            mbedtls_asn1_write_oid(
-                &c, buf, MBEDTLS_OID_PKCS9_CSR_EXT_REQ,
-                MBEDTLS_OID_SIZE( MBEDTLS_OID_PKCS9_CSR_EXT_REQ ) ) );
+        MBEDTLS_ASN1_CHK_ADD(len,
+                             mbedtls_asn1_write_oid(
+                                 &c, buf, MBEDTLS_OID_PKCS9_CSR_EXT_REQ,
+                                 MBEDTLS_OID_SIZE(MBEDTLS_OID_PKCS9_CSR_EXT_REQ)));
 
-        MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
-        MBEDTLS_ASN1_CHK_ADD( len,
-            mbedtls_asn1_write_tag(
-                &c, buf,
-                MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) );
+        MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(&c, buf, len));
+        MBEDTLS_ASN1_CHK_ADD(len,
+                             mbedtls_asn1_write_tag(
+                                 &c, buf,
+                                 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE));
     }
 
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
-    MBEDTLS_ASN1_CHK_ADD( len,
-        mbedtls_asn1_write_tag(
-            &c, buf,
-            MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_CONTEXT_SPECIFIC ) );
+    MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(&c, buf, len));
+    MBEDTLS_ASN1_CHK_ADD(len,
+                         mbedtls_asn1_write_tag(
+                             &c, buf,
+                             MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_CONTEXT_SPECIFIC));
 
-    MBEDTLS_ASN1_CHK_ADD( pub_len, mbedtls_pk_write_pubkey_der( ctx->key,
-                                                              buf, c - buf ) );
+    MBEDTLS_ASN1_CHK_ADD(pub_len, mbedtls_pk_write_pubkey_der(ctx->key,
+                                                              buf, c - buf));
     c -= pub_len;
     len += pub_len;
 
     /*
      *  Subject  ::=  Name
      */
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_x509_write_names( &c, buf,
-                                                         ctx->subject ) );
+    MBEDTLS_ASN1_CHK_ADD(len, mbedtls_x509_write_names(&c, buf,
+                                                       ctx->subject));
 
     /*
      *  Version  ::=  INTEGER  {  v1(0), v2(1), v3(2)  }
      */
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_int( &c, buf, 0 ) );
+    MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_int(&c, buf, 0));
 
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
-    MBEDTLS_ASN1_CHK_ADD( len,
-        mbedtls_asn1_write_tag(
-            &c, buf,
-            MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) );
+    MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(&c, buf, len));
+    MBEDTLS_ASN1_CHK_ADD(len,
+                         mbedtls_asn1_write_tag(
+                             &c, buf,
+                             MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE));
 
     /*
      * Sign the written CSR data into the sig buffer
      * Note: hash errors can happen only after an internal error
      */
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( psa_hash_setup( &hash_operation, hash_alg ) != PSA_SUCCESS )
-        return( MBEDTLS_ERR_X509_FATAL_ERROR );
+    if (psa_hash_setup(&hash_operation, hash_alg) != PSA_SUCCESS) {
+        return MBEDTLS_ERR_X509_FATAL_ERROR;
+    }
 
-    if( psa_hash_update( &hash_operation, c, len ) != PSA_SUCCESS )
-        return( MBEDTLS_ERR_X509_FATAL_ERROR );
+    if (psa_hash_update(&hash_operation, c, len) != PSA_SUCCESS) {
+        return MBEDTLS_ERR_X509_FATAL_ERROR;
+    }
 
-    if( psa_hash_finish( &hash_operation, hash, sizeof( hash ), &hash_len )
-        != PSA_SUCCESS )
-    {
-        return( MBEDTLS_ERR_X509_FATAL_ERROR );
+    if (psa_hash_finish(&hash_operation, hash, sizeof(hash), &hash_len)
+        != PSA_SUCCESS) {
+        return MBEDTLS_ERR_X509_FATAL_ERROR;
     }
 #else /* MBEDTLS_USE_PSA_CRYPTO */
-    ret = mbedtls_md( mbedtls_md_info_from_type( ctx->md_alg ), c, len, hash );
-    if( ret != 0 )
-        return( ret );
+    ret = mbedtls_md(mbedtls_md_info_from_type(ctx->md_alg), c, len, hash);
+    if (ret != 0) {
+        return ret;
+    }
 #endif
-    if( ( ret = mbedtls_pk_sign( ctx->key, ctx->md_alg, hash, 0, sig, &sig_len,
-                                 f_rng, p_rng ) ) != 0 )
-    {
-        return( ret );
+    if ((ret = mbedtls_pk_sign(ctx->key, ctx->md_alg, hash, 0, sig, &sig_len,
+                               f_rng, p_rng)) != 0) {
+        return ret;
     }
 
-    if( mbedtls_pk_can_do( ctx->key, MBEDTLS_PK_RSA ) )
+    if (mbedtls_pk_can_do(ctx->key, MBEDTLS_PK_RSA)) {
         pk_alg = MBEDTLS_PK_RSA;
-    else if( mbedtls_pk_can_do( ctx->key, MBEDTLS_PK_ECDSA ) )
+    } else if (mbedtls_pk_can_do(ctx->key, MBEDTLS_PK_ECDSA)) {
         pk_alg = MBEDTLS_PK_ECDSA;
-    else
-        return( MBEDTLS_ERR_X509_INVALID_ALG );
+    } else {
+        return MBEDTLS_ERR_X509_INVALID_ALG;
+    }
 
-    if( ( ret = mbedtls_oid_get_oid_by_sig_alg( pk_alg, ctx->md_alg,
-                                              &sig_oid, &sig_oid_len ) ) != 0 )
-    {
-        return( ret );
+    if ((ret = mbedtls_oid_get_oid_by_sig_alg(pk_alg, ctx->md_alg,
+                                              &sig_oid, &sig_oid_len)) != 0) {
+        return ret;
     }
 
     /*
      * Move the written CSR data to the start of buf to create space for
      * writing the signature into buf.
      */
-    memmove( buf, c, len );
+    memmove(buf, c, len);
 
     /*
      * Write sig and its OID into buf backwards from the end of buf.
@@ -259,76 +263,73 @@
      * and return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL if needed.
      */
     c2 = buf + size;
-    MBEDTLS_ASN1_CHK_ADD( sig_and_oid_len,
-        mbedtls_x509_write_sig( &c2, buf + len, sig_oid, sig_oid_len,
-                                sig, sig_len ) );
+    MBEDTLS_ASN1_CHK_ADD(sig_and_oid_len,
+                         mbedtls_x509_write_sig(&c2, buf + len, sig_oid, sig_oid_len,
+                                                sig, sig_len));
 
     /*
      * Compact the space between the CSR data and signature by moving the
      * CSR data to the start of the signature.
      */
     c2 -= len;
-    memmove( c2, buf, len );
+    memmove(c2, buf, len);
 
     /* ASN encode the total size and tag the CSR data with it. */
     len += sig_and_oid_len;
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c2, buf, len ) );
-    MBEDTLS_ASN1_CHK_ADD( len,
-        mbedtls_asn1_write_tag(
-            &c2, buf,
-            MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) );
+    MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(&c2, buf, len));
+    MBEDTLS_ASN1_CHK_ADD(len,
+                         mbedtls_asn1_write_tag(
+                             &c2, buf,
+                             MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE));
 
     /* Zero the unused bytes at the start of buf */
-    memset( buf, 0, c2 - buf);
+    memset(buf, 0, c2 - buf);
 
-    return( (int) len );
+    return (int) len;
 }
 
-int mbedtls_x509write_csr_der( mbedtls_x509write_csr *ctx, unsigned char *buf,
-                               size_t size,
-                               int (*f_rng)(void *, unsigned char *, size_t),
-                               void *p_rng )
+int mbedtls_x509write_csr_der(mbedtls_x509write_csr *ctx, unsigned char *buf,
+                              size_t size,
+                              int (*f_rng)(void *, unsigned char *, size_t),
+                              void *p_rng)
 {
     int ret;
     unsigned char *sig;
 
-    if( ( sig = mbedtls_calloc( 1, MBEDTLS_PK_SIGNATURE_MAX_SIZE ) ) == NULL )
-    {
-        return( MBEDTLS_ERR_X509_ALLOC_FAILED );
+    if ((sig = mbedtls_calloc(1, MBEDTLS_PK_SIGNATURE_MAX_SIZE)) == NULL) {
+        return MBEDTLS_ERR_X509_ALLOC_FAILED;
     }
 
-    ret = x509write_csr_der_internal( ctx, buf, size, sig, f_rng, p_rng );
+    ret = x509write_csr_der_internal(ctx, buf, size, sig, f_rng, p_rng);
 
-    mbedtls_free( sig );
+    mbedtls_free(sig);
 
-    return( ret );
+    return ret;
 }
 
 #define PEM_BEGIN_CSR           "-----BEGIN CERTIFICATE REQUEST-----\n"
 #define PEM_END_CSR             "-----END CERTIFICATE REQUEST-----\n"
 
 #if defined(MBEDTLS_PEM_WRITE_C)
-int mbedtls_x509write_csr_pem( mbedtls_x509write_csr *ctx, unsigned char *buf, size_t size,
-                       int (*f_rng)(void *, unsigned char *, size_t),
-                       void *p_rng )
+int mbedtls_x509write_csr_pem(mbedtls_x509write_csr *ctx, unsigned char *buf, size_t size,
+                              int (*f_rng)(void *, unsigned char *, size_t),
+                              void *p_rng)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t olen = 0;
 
-    if( ( ret = mbedtls_x509write_csr_der( ctx, buf, size,
-                                   f_rng, p_rng ) ) < 0 )
-    {
-        return( ret );
+    if ((ret = mbedtls_x509write_csr_der(ctx, buf, size,
+                                         f_rng, p_rng)) < 0) {
+        return ret;
     }
 
-    if( ( ret = mbedtls_pem_write_buffer( PEM_BEGIN_CSR, PEM_END_CSR,
-                                  buf + size - ret,
-                                  ret, buf, size, &olen ) ) != 0 )
-    {
-        return( ret );
+    if ((ret = mbedtls_pem_write_buffer(PEM_BEGIN_CSR, PEM_END_CSR,
+                                        buf + size - ret,
+                                        ret, buf, size, &olen)) != 0) {
+        return ret;
     }
 
-    return( 0 );
+    return 0;
 }
 #endif /* MBEDTLS_PEM_WRITE_C */