diff --git a/library/pem.c b/library/pem.c
index e8abba1..8044ed6 100644
--- a/library/pem.c
+++ b/library/pem.c
@@ -43,106 +43,121 @@
 
 #if defined(MBEDTLS_HAS_ALG_MD5_VIA_MD_OR_PSA_BASED_ON_USE_PSA) &&  \
     defined(MBEDTLS_CIPHER_MODE_CBC) &&                             \
-    ( defined(MBEDTLS_DES_C) || defined(MBEDTLS_AES_C) )
+    (defined(MBEDTLS_DES_C) || defined(MBEDTLS_AES_C))
 #define PEM_RFC1421
 #endif /* MBEDTLS_HAS_ALG_MD5_VIA_MD_OR_PSA_BASED_ON_USE_PSA &&
           MBEDTLS_CIPHER_MODE_CBC &&
           ( MBEDTLS_AES_C || MBEDTLS_DES_C ) */
 
 #if defined(MBEDTLS_PEM_PARSE_C)
-void mbedtls_pem_init( mbedtls_pem_context *ctx )
+void mbedtls_pem_init(mbedtls_pem_context *ctx)
 {
-    memset( ctx, 0, sizeof( mbedtls_pem_context ) );
+    memset(ctx, 0, sizeof(mbedtls_pem_context));
 }
 
 #if defined(PEM_RFC1421)
 /*
  * Read a 16-byte hex string and convert it to binary
  */
-static int pem_get_iv( const unsigned char *s, unsigned char *iv,
-                       size_t iv_len )
+static int pem_get_iv(const unsigned char *s, unsigned char *iv,
+                      size_t iv_len)
 {
     size_t i, j, k;
 
-    memset( iv, 0, iv_len );
+    memset(iv, 0, iv_len);
 
-    for( i = 0; i < iv_len * 2; i++, s++ )
-    {
-        if( *s >= '0' && *s <= '9' ) j = *s - '0'; else
-        if( *s >= 'A' && *s <= 'F' ) j = *s - '7'; else
-        if( *s >= 'a' && *s <= 'f' ) j = *s - 'W'; else
-            return( MBEDTLS_ERR_PEM_INVALID_ENC_IV );
+    for (i = 0; i < iv_len * 2; i++, s++) {
+        if (*s >= '0' && *s <= '9') {
+            j = *s - '0';
+        } else
+        if (*s >= 'A' && *s <= 'F') {
+            j = *s - '7';
+        } else
+        if (*s >= 'a' && *s <= 'f') {
+            j = *s - 'W';
+        } else {
+            return MBEDTLS_ERR_PEM_INVALID_ENC_IV;
+        }
 
-        k = ( ( i & 1 ) != 0 ) ? j : j << 4;
+        k = ((i & 1) != 0) ? j : j << 4;
 
-        iv[i >> 1] = (unsigned char)( iv[i >> 1] | k );
+        iv[i >> 1] = (unsigned char) (iv[i >> 1] | k);
     }
 
-    return( 0 );
+    return 0;
 }
 
 #if defined(MBEDTLS_MD5_C)
-static int pem_pbkdf1( unsigned char *key, size_t keylen,
-                       unsigned char *iv,
-                       const unsigned char *pwd, size_t pwdlen )
+static int pem_pbkdf1(unsigned char *key, size_t keylen,
+                      unsigned char *iv,
+                      const unsigned char *pwd, size_t pwdlen)
 {
     mbedtls_md5_context md5_ctx;
     unsigned char md5sum[16];
     size_t use_len;
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    mbedtls_md5_init( &md5_ctx );
+    mbedtls_md5_init(&md5_ctx);
 
     /*
      * key[ 0..15] = MD5(pwd || IV)
      */
-    if( ( ret = mbedtls_md5_starts( &md5_ctx ) ) != 0 )
+    if ((ret = mbedtls_md5_starts(&md5_ctx)) != 0) {
         goto exit;
-    if( ( ret = mbedtls_md5_update( &md5_ctx, pwd, pwdlen ) ) != 0 )
+    }
+    if ((ret = mbedtls_md5_update(&md5_ctx, pwd, pwdlen)) != 0) {
         goto exit;
-    if( ( ret = mbedtls_md5_update( &md5_ctx, iv,  8 ) ) != 0 )
+    }
+    if ((ret = mbedtls_md5_update(&md5_ctx, iv,  8)) != 0) {
         goto exit;
-    if( ( ret = mbedtls_md5_finish( &md5_ctx, md5sum ) ) != 0 )
-        goto exit;
-
-    if( keylen <= 16 )
-    {
-        memcpy( key, md5sum, keylen );
+    }
+    if ((ret = mbedtls_md5_finish(&md5_ctx, md5sum)) != 0) {
         goto exit;
     }
 
-    memcpy( key, md5sum, 16 );
+    if (keylen <= 16) {
+        memcpy(key, md5sum, keylen);
+        goto exit;
+    }
+
+    memcpy(key, md5sum, 16);
 
     /*
      * key[16..23] = MD5(key[ 0..15] || pwd || IV])
      */
-    if( ( ret = mbedtls_md5_starts( &md5_ctx ) ) != 0 )
+    if ((ret = mbedtls_md5_starts(&md5_ctx)) != 0) {
         goto exit;
-    if( ( ret = mbedtls_md5_update( &md5_ctx, md5sum, 16 ) ) != 0 )
+    }
+    if ((ret = mbedtls_md5_update(&md5_ctx, md5sum, 16)) != 0) {
         goto exit;
-    if( ( ret = mbedtls_md5_update( &md5_ctx, pwd, pwdlen ) ) != 0 )
+    }
+    if ((ret = mbedtls_md5_update(&md5_ctx, pwd, pwdlen)) != 0) {
         goto exit;
-    if( ( ret = mbedtls_md5_update( &md5_ctx, iv, 8 ) ) != 0 )
+    }
+    if ((ret = mbedtls_md5_update(&md5_ctx, iv, 8)) != 0) {
         goto exit;
-    if( ( ret = mbedtls_md5_finish( &md5_ctx, md5sum ) ) != 0 )
+    }
+    if ((ret = mbedtls_md5_finish(&md5_ctx, md5sum)) != 0) {
         goto exit;
+    }
 
     use_len = 16;
-    if( keylen < 32 )
+    if (keylen < 32) {
         use_len = keylen - 16;
+    }
 
-    memcpy( key + 16, md5sum, use_len );
+    memcpy(key + 16, md5sum, use_len);
 
 exit:
-    mbedtls_md5_free( &md5_ctx );
-    mbedtls_platform_zeroize( md5sum, 16 );
+    mbedtls_md5_free(&md5_ctx);
+    mbedtls_platform_zeroize(md5sum, 16);
 
-    return( ret );
+    return ret;
 }
 #else
-static int pem_pbkdf1( unsigned char *key, size_t keylen,
-                       unsigned char *iv,
-                       const unsigned char *pwd, size_t pwdlen )
+static int pem_pbkdf1(unsigned char *key, size_t keylen,
+                      unsigned char *iv,
+                      const unsigned char *pwd, size_t pwdlen)
 {
     unsigned char md5sum[16];
     psa_hash_operation_t operation = PSA_HASH_OPERATION_INIT;
@@ -150,71 +165,78 @@
     psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
 
 
-    if( ( status = psa_hash_setup( &operation, PSA_ALG_MD5 ) ) != PSA_SUCCESS )
-        goto exit;
-
-    if( ( status = psa_hash_update( &operation, pwd, pwdlen ) ) != PSA_SUCCESS )
-        goto exit;
-
-    if( ( status = psa_hash_update( &operation, iv, 8 ) ) != PSA_SUCCESS )
-        goto exit;
-
-    if( ( status = psa_hash_finish( &operation, md5sum,
-                                    PSA_HASH_LENGTH( PSA_ALG_MD5 ),
-                                    &output_length ) ) != PSA_SUCCESS )
-    {
+    if ((status = psa_hash_setup(&operation, PSA_ALG_MD5)) != PSA_SUCCESS) {
         goto exit;
     }
 
-    if( ( status = psa_hash_abort( &operation ) ) != PSA_SUCCESS )
+    if ((status = psa_hash_update(&operation, pwd, pwdlen)) != PSA_SUCCESS) {
         goto exit;
+    }
+
+    if ((status = psa_hash_update(&operation, iv, 8)) != PSA_SUCCESS) {
+        goto exit;
+    }
+
+    if ((status = psa_hash_finish(&operation, md5sum,
+                                  PSA_HASH_LENGTH(PSA_ALG_MD5),
+                                  &output_length)) != PSA_SUCCESS) {
+        goto exit;
+    }
+
+    if ((status = psa_hash_abort(&operation)) != PSA_SUCCESS) {
+        goto exit;
+    }
 
     /*
      * key[ 0..15] = MD5(pwd || IV)
      */
-    if( keylen <= 16 )
-    {
-        memcpy( key, md5sum, keylen );
+    if (keylen <= 16) {
+        memcpy(key, md5sum, keylen);
         goto exit;
     }
 
-    memcpy( key, md5sum, 16 );
+    memcpy(key, md5sum, 16);
 
     /*
      * key[16..23] = MD5(key[ 0..15] || pwd || IV])
      */
-    if( ( status = psa_hash_setup( &operation, PSA_ALG_MD5 ) ) != PSA_SUCCESS )
-        goto exit;
-
-    if( ( status = psa_hash_update( &operation, md5sum, 16 ) ) != PSA_SUCCESS )
-        goto exit;
-
-    if( ( status = psa_hash_update( &operation, pwd, pwdlen ) ) != PSA_SUCCESS )
-        goto exit;
-
-    if( ( status = psa_hash_update( &operation, iv, 8 ) ) != PSA_SUCCESS )
-        goto exit;
-
-    if( ( status = psa_hash_finish( &operation, md5sum,
-                                    PSA_HASH_LENGTH( PSA_ALG_MD5 ),
-                                    &output_length ) ) != PSA_SUCCESS )
-    {
+    if ((status = psa_hash_setup(&operation, PSA_ALG_MD5)) != PSA_SUCCESS) {
         goto exit;
     }
 
-    if( ( status = psa_hash_abort( &operation ) ) != PSA_SUCCESS )
+    if ((status = psa_hash_update(&operation, md5sum, 16)) != PSA_SUCCESS) {
         goto exit;
+    }
+
+    if ((status = psa_hash_update(&operation, pwd, pwdlen)) != PSA_SUCCESS) {
+        goto exit;
+    }
+
+    if ((status = psa_hash_update(&operation, iv, 8)) != PSA_SUCCESS) {
+        goto exit;
+    }
+
+    if ((status = psa_hash_finish(&operation, md5sum,
+                                  PSA_HASH_LENGTH(PSA_ALG_MD5),
+                                  &output_length)) != PSA_SUCCESS) {
+        goto exit;
+    }
+
+    if ((status = psa_hash_abort(&operation)) != PSA_SUCCESS) {
+        goto exit;
+    }
 
     size_t use_len = 16;
-    if( keylen < 32 )
+    if (keylen < 32) {
         use_len = keylen - 16;
+    }
 
-    memcpy( key + 16, md5sum, use_len );
+    memcpy(key + 16, md5sum, use_len);
 
 exit:
-    mbedtls_platform_zeroize( md5sum, 16 );
+    mbedtls_platform_zeroize(md5sum, 16);
 
-    return( mbedtls_md_error_from_psa ( status ) );
+    return mbedtls_md_error_from_psa(status);
 }
 #endif /* MBEDTLS_MD5_C */
 
@@ -222,57 +244,61 @@
 /*
  * Decrypt with DES-CBC, using PBKDF1 for key derivation
  */
-static int pem_des_decrypt( unsigned char des_iv[8],
-                            unsigned char *buf, size_t buflen,
-                            const unsigned char *pwd, size_t pwdlen )
+static int pem_des_decrypt(unsigned char des_iv[8],
+                           unsigned char *buf, size_t buflen,
+                           const unsigned char *pwd, size_t pwdlen)
 {
     mbedtls_des_context des_ctx;
     unsigned char des_key[8];
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    mbedtls_des_init( &des_ctx );
+    mbedtls_des_init(&des_ctx);
 
-    if( ( ret = pem_pbkdf1( des_key, 8, des_iv, pwd, pwdlen ) ) != 0 )
+    if ((ret = pem_pbkdf1(des_key, 8, des_iv, pwd, pwdlen)) != 0) {
         goto exit;
+    }
 
-    if( ( ret = mbedtls_des_setkey_dec( &des_ctx, des_key ) ) != 0 )
+    if ((ret = mbedtls_des_setkey_dec(&des_ctx, des_key)) != 0) {
         goto exit;
-    ret = mbedtls_des_crypt_cbc( &des_ctx, MBEDTLS_DES_DECRYPT, buflen,
-                     des_iv, buf, buf );
+    }
+    ret = mbedtls_des_crypt_cbc(&des_ctx, MBEDTLS_DES_DECRYPT, buflen,
+                                des_iv, buf, buf);
 
 exit:
-    mbedtls_des_free( &des_ctx );
-    mbedtls_platform_zeroize( des_key, 8 );
+    mbedtls_des_free(&des_ctx);
+    mbedtls_platform_zeroize(des_key, 8);
 
-    return( ret );
+    return ret;
 }
 
 /*
  * Decrypt with 3DES-CBC, using PBKDF1 for key derivation
  */
-static int pem_des3_decrypt( unsigned char des3_iv[8],
-                             unsigned char *buf, size_t buflen,
-                             const unsigned char *pwd, size_t pwdlen )
+static int pem_des3_decrypt(unsigned char des3_iv[8],
+                            unsigned char *buf, size_t buflen,
+                            const unsigned char *pwd, size_t pwdlen)
 {
     mbedtls_des3_context des3_ctx;
     unsigned char des3_key[24];
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    mbedtls_des3_init( &des3_ctx );
+    mbedtls_des3_init(&des3_ctx);
 
-    if( ( ret = pem_pbkdf1( des3_key, 24, des3_iv, pwd, pwdlen ) ) != 0 )
+    if ((ret = pem_pbkdf1(des3_key, 24, des3_iv, pwd, pwdlen)) != 0) {
         goto exit;
+    }
 
-    if( ( ret = mbedtls_des3_set3key_dec( &des3_ctx, des3_key ) ) != 0 )
+    if ((ret = mbedtls_des3_set3key_dec(&des3_ctx, des3_key)) != 0) {
         goto exit;
-    ret = mbedtls_des3_crypt_cbc( &des3_ctx, MBEDTLS_DES_DECRYPT, buflen,
-                     des3_iv, buf, buf );
+    }
+    ret = mbedtls_des3_crypt_cbc(&des3_ctx, MBEDTLS_DES_DECRYPT, buflen,
+                                 des3_iv, buf, buf);
 
 exit:
-    mbedtls_des3_free( &des3_ctx );
-    mbedtls_platform_zeroize( des3_key, 24 );
+    mbedtls_des3_free(&des3_ctx);
+    mbedtls_platform_zeroize(des3_key, 24);
 
-    return( ret );
+    return ret;
 }
 #endif /* MBEDTLS_DES_C */
 
@@ -280,37 +306,39 @@
 /*
  * Decrypt with AES-XXX-CBC, using PBKDF1 for key derivation
  */
-static int pem_aes_decrypt( unsigned char aes_iv[16], unsigned int keylen,
-                            unsigned char *buf, size_t buflen,
-                            const unsigned char *pwd, size_t pwdlen )
+static int pem_aes_decrypt(unsigned char aes_iv[16], unsigned int keylen,
+                           unsigned char *buf, size_t buflen,
+                           const unsigned char *pwd, size_t pwdlen)
 {
     mbedtls_aes_context aes_ctx;
     unsigned char aes_key[32];
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    mbedtls_aes_init( &aes_ctx );
+    mbedtls_aes_init(&aes_ctx);
 
-    if( ( ret = pem_pbkdf1( aes_key, keylen, aes_iv, pwd, pwdlen ) ) != 0 )
+    if ((ret = pem_pbkdf1(aes_key, keylen, aes_iv, pwd, pwdlen)) != 0) {
         goto exit;
+    }
 
-    if( ( ret = mbedtls_aes_setkey_dec( &aes_ctx, aes_key, keylen * 8 ) ) != 0 )
+    if ((ret = mbedtls_aes_setkey_dec(&aes_ctx, aes_key, keylen * 8)) != 0) {
         goto exit;
-    ret = mbedtls_aes_crypt_cbc( &aes_ctx, MBEDTLS_AES_DECRYPT, buflen,
-                     aes_iv, buf, buf );
+    }
+    ret = mbedtls_aes_crypt_cbc(&aes_ctx, MBEDTLS_AES_DECRYPT, buflen,
+                                aes_iv, buf, buf);
 
 exit:
-    mbedtls_aes_free( &aes_ctx );
-    mbedtls_platform_zeroize( aes_key, keylen );
+    mbedtls_aes_free(&aes_ctx);
+    mbedtls_platform_zeroize(aes_key, keylen);
 
-    return( ret );
+    return ret;
 }
 #endif /* MBEDTLS_AES_C */
 
 #endif /* PEM_RFC1421 */
 
-int mbedtls_pem_read_buffer( mbedtls_pem_context *ctx, const char *header, const char *footer,
-                     const unsigned char *data, const unsigned char *pwd,
-                     size_t pwdlen, size_t *use_len )
+int mbedtls_pem_read_buffer(mbedtls_pem_context *ctx, const char *header, const char *footer,
+                            const unsigned char *data, const unsigned char *pwd,
+                            size_t pwdlen, size_t *use_len)
 {
     int ret, enc;
     size_t len;
@@ -324,151 +352,178 @@
     ((void) pwdlen);
 #endif /* PEM_RFC1421 */
 
-    if( ctx == NULL )
-        return( MBEDTLS_ERR_PEM_BAD_INPUT_DATA );
+    if (ctx == NULL) {
+        return MBEDTLS_ERR_PEM_BAD_INPUT_DATA;
+    }
 
-    s1 = (unsigned char *) strstr( (const char *) data, header );
+    s1 = (unsigned char *) strstr((const char *) data, header);
 
-    if( s1 == NULL )
-        return( MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT );
+    if (s1 == NULL) {
+        return MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
+    }
 
-    s2 = (unsigned char *) strstr( (const char *) data, footer );
+    s2 = (unsigned char *) strstr((const char *) data, footer);
 
-    if( s2 == NULL || s2 <= s1 )
-        return( MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT );
+    if (s2 == NULL || s2 <= s1) {
+        return MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
+    }
 
-    s1 += strlen( header );
-    if( *s1 == ' '  ) s1++;
-    if( *s1 == '\r' ) s1++;
-    if( *s1 == '\n' ) s1++;
-    else return( MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT );
+    s1 += strlen(header);
+    if (*s1 == ' ') {
+        s1++;
+    }
+    if (*s1 == '\r') {
+        s1++;
+    }
+    if (*s1 == '\n') {
+        s1++;
+    } else {
+        return MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
+    }
 
     end = s2;
-    end += strlen( footer );
-    if( *end == ' '  ) end++;
-    if( *end == '\r' ) end++;
-    if( *end == '\n' ) end++;
+    end += strlen(footer);
+    if (*end == ' ') {
+        end++;
+    }
+    if (*end == '\r') {
+        end++;
+    }
+    if (*end == '\n') {
+        end++;
+    }
     *use_len = end - data;
 
     enc = 0;
 
-    if( s2 - s1 >= 22 && memcmp( s1, "Proc-Type: 4,ENCRYPTED", 22 ) == 0 )
-    {
+    if (s2 - s1 >= 22 && memcmp(s1, "Proc-Type: 4,ENCRYPTED", 22) == 0) {
 #if defined(PEM_RFC1421)
         enc++;
 
         s1 += 22;
-        if( *s1 == '\r' ) s1++;
-        if( *s1 == '\n' ) s1++;
-        else return( MBEDTLS_ERR_PEM_INVALID_DATA );
+        if (*s1 == '\r') {
+            s1++;
+        }
+        if (*s1 == '\n') {
+            s1++;
+        } else {
+            return MBEDTLS_ERR_PEM_INVALID_DATA;
+        }
 
 
 #if defined(MBEDTLS_DES_C)
-        if( s2 - s1 >= 23 && memcmp( s1, "DEK-Info: DES-EDE3-CBC,", 23 ) == 0 )
-        {
+        if (s2 - s1 >= 23 && memcmp(s1, "DEK-Info: DES-EDE3-CBC,", 23) == 0) {
             enc_alg = MBEDTLS_CIPHER_DES_EDE3_CBC;
 
             s1 += 23;
-            if( s2 - s1 < 16 || pem_get_iv( s1, pem_iv, 8 ) != 0 )
-                return( MBEDTLS_ERR_PEM_INVALID_ENC_IV );
+            if (s2 - s1 < 16 || pem_get_iv(s1, pem_iv, 8) != 0) {
+                return MBEDTLS_ERR_PEM_INVALID_ENC_IV;
+            }
 
             s1 += 16;
-        }
-        else if( s2 - s1 >= 18 && memcmp( s1, "DEK-Info: DES-CBC,", 18 ) == 0 )
-        {
+        } else if (s2 - s1 >= 18 && memcmp(s1, "DEK-Info: DES-CBC,", 18) == 0) {
             enc_alg = MBEDTLS_CIPHER_DES_CBC;
 
             s1 += 18;
-            if( s2 - s1 < 16 || pem_get_iv( s1, pem_iv, 8) != 0 )
-                return( MBEDTLS_ERR_PEM_INVALID_ENC_IV );
+            if (s2 - s1 < 16 || pem_get_iv(s1, pem_iv, 8) != 0) {
+                return MBEDTLS_ERR_PEM_INVALID_ENC_IV;
+            }
 
             s1 += 16;
         }
 #endif /* MBEDTLS_DES_C */
 
 #if defined(MBEDTLS_AES_C)
-        if( s2 - s1 >= 14 && memcmp( s1, "DEK-Info: AES-", 14 ) == 0 )
-        {
-            if( s2 - s1 < 22 )
-                return( MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG );
-            else if( memcmp( s1, "DEK-Info: AES-128-CBC,", 22 ) == 0 )
+        if (s2 - s1 >= 14 && memcmp(s1, "DEK-Info: AES-", 14) == 0) {
+            if (s2 - s1 < 22) {
+                return MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG;
+            } else if (memcmp(s1, "DEK-Info: AES-128-CBC,", 22) == 0) {
                 enc_alg = MBEDTLS_CIPHER_AES_128_CBC;
-            else if( memcmp( s1, "DEK-Info: AES-192-CBC,", 22 ) == 0 )
+            } else if (memcmp(s1, "DEK-Info: AES-192-CBC,", 22) == 0) {
                 enc_alg = MBEDTLS_CIPHER_AES_192_CBC;
-            else if( memcmp( s1, "DEK-Info: AES-256-CBC,", 22 ) == 0 )
+            } else if (memcmp(s1, "DEK-Info: AES-256-CBC,", 22) == 0) {
                 enc_alg = MBEDTLS_CIPHER_AES_256_CBC;
-            else
-                return( MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG );
+            } else {
+                return MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG;
+            }
 
             s1 += 22;
-            if( s2 - s1 < 32 || pem_get_iv( s1, pem_iv, 16 ) != 0 )
-                return( MBEDTLS_ERR_PEM_INVALID_ENC_IV );
+            if (s2 - s1 < 32 || pem_get_iv(s1, pem_iv, 16) != 0) {
+                return MBEDTLS_ERR_PEM_INVALID_ENC_IV;
+            }
 
             s1 += 32;
         }
 #endif /* MBEDTLS_AES_C */
 
-        if( enc_alg == MBEDTLS_CIPHER_NONE )
-            return( MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG );
+        if (enc_alg == MBEDTLS_CIPHER_NONE) {
+            return MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG;
+        }
 
-        if( *s1 == '\r' ) s1++;
-        if( *s1 == '\n' ) s1++;
-        else return( MBEDTLS_ERR_PEM_INVALID_DATA );
+        if (*s1 == '\r') {
+            s1++;
+        }
+        if (*s1 == '\n') {
+            s1++;
+        } else {
+            return MBEDTLS_ERR_PEM_INVALID_DATA;
+        }
 #else
-        return( MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE );
+        return MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE;
 #endif /* PEM_RFC1421 */
     }
 
-    if( s1 >= s2 )
-        return( MBEDTLS_ERR_PEM_INVALID_DATA );
-
-    ret = mbedtls_base64_decode( NULL, 0, &len, s1, s2 - s1 );
-
-    if( ret == MBEDTLS_ERR_BASE64_INVALID_CHARACTER )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PEM_INVALID_DATA, ret ) );
-
-    if( ( buf = mbedtls_calloc( 1, len ) ) == NULL )
-        return( MBEDTLS_ERR_PEM_ALLOC_FAILED );
-
-    if( ( ret = mbedtls_base64_decode( buf, len, &len, s1, s2 - s1 ) ) != 0 )
-    {
-        mbedtls_platform_zeroize( buf, len );
-        mbedtls_free( buf );
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PEM_INVALID_DATA, ret ) );
+    if (s1 >= s2) {
+        return MBEDTLS_ERR_PEM_INVALID_DATA;
     }
 
-    if( enc != 0 )
-    {
+    ret = mbedtls_base64_decode(NULL, 0, &len, s1, s2 - s1);
+
+    if (ret == MBEDTLS_ERR_BASE64_INVALID_CHARACTER) {
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PEM_INVALID_DATA, ret);
+    }
+
+    if ((buf = mbedtls_calloc(1, len)) == NULL) {
+        return MBEDTLS_ERR_PEM_ALLOC_FAILED;
+    }
+
+    if ((ret = mbedtls_base64_decode(buf, len, &len, s1, s2 - s1)) != 0) {
+        mbedtls_platform_zeroize(buf, len);
+        mbedtls_free(buf);
+        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PEM_INVALID_DATA, ret);
+    }
+
+    if (enc != 0) {
 #if defined(PEM_RFC1421)
-        if( pwd == NULL )
-        {
-            mbedtls_platform_zeroize( buf, len );
-            mbedtls_free( buf );
-            return( MBEDTLS_ERR_PEM_PASSWORD_REQUIRED );
+        if (pwd == NULL) {
+            mbedtls_platform_zeroize(buf, len);
+            mbedtls_free(buf);
+            return MBEDTLS_ERR_PEM_PASSWORD_REQUIRED;
         }
 
         ret = 0;
 
 #if defined(MBEDTLS_DES_C)
-        if( enc_alg == MBEDTLS_CIPHER_DES_EDE3_CBC )
-            ret = pem_des3_decrypt( pem_iv, buf, len, pwd, pwdlen );
-        else if( enc_alg == MBEDTLS_CIPHER_DES_CBC )
-            ret = pem_des_decrypt( pem_iv, buf, len, pwd, pwdlen );
+        if (enc_alg == MBEDTLS_CIPHER_DES_EDE3_CBC) {
+            ret = pem_des3_decrypt(pem_iv, buf, len, pwd, pwdlen);
+        } else if (enc_alg == MBEDTLS_CIPHER_DES_CBC) {
+            ret = pem_des_decrypt(pem_iv, buf, len, pwd, pwdlen);
+        }
 #endif /* MBEDTLS_DES_C */
 
 #if defined(MBEDTLS_AES_C)
-        if( enc_alg == MBEDTLS_CIPHER_AES_128_CBC )
-            ret = pem_aes_decrypt( pem_iv, 16, buf, len, pwd, pwdlen );
-        else if( enc_alg == MBEDTLS_CIPHER_AES_192_CBC )
-            ret = pem_aes_decrypt( pem_iv, 24, buf, len, pwd, pwdlen );
-        else if( enc_alg == MBEDTLS_CIPHER_AES_256_CBC )
-            ret = pem_aes_decrypt( pem_iv, 32, buf, len, pwd, pwdlen );
+        if (enc_alg == MBEDTLS_CIPHER_AES_128_CBC) {
+            ret = pem_aes_decrypt(pem_iv, 16, buf, len, pwd, pwdlen);
+        } else if (enc_alg == MBEDTLS_CIPHER_AES_192_CBC) {
+            ret = pem_aes_decrypt(pem_iv, 24, buf, len, pwd, pwdlen);
+        } else if (enc_alg == MBEDTLS_CIPHER_AES_256_CBC) {
+            ret = pem_aes_decrypt(pem_iv, 32, buf, len, pwd, pwdlen);
+        }
 #endif /* MBEDTLS_AES_C */
 
-        if( ret != 0 )
-        {
-            mbedtls_free( buf );
-            return( ret );
+        if (ret != 0) {
+            mbedtls_free(buf);
+            return ret;
         }
 
         /*
@@ -477,93 +532,88 @@
          *
          * Use that as a heuristic to try to detect password mismatches.
          */
-        if( len <= 2 || buf[0] != 0x30 || buf[1] > 0x83 )
-        {
-            mbedtls_platform_zeroize( buf, len );
-            mbedtls_free( buf );
-            return( MBEDTLS_ERR_PEM_PASSWORD_MISMATCH );
+        if (len <= 2 || buf[0] != 0x30 || buf[1] > 0x83) {
+            mbedtls_platform_zeroize(buf, len);
+            mbedtls_free(buf);
+            return MBEDTLS_ERR_PEM_PASSWORD_MISMATCH;
         }
 #else
-        mbedtls_platform_zeroize( buf, len );
-        mbedtls_free( buf );
-        return( MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE );
+        mbedtls_platform_zeroize(buf, len);
+        mbedtls_free(buf);
+        return MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE;
 #endif /* PEM_RFC1421 */
     }
 
     ctx->buf = buf;
     ctx->buflen = len;
 
-    return( 0 );
+    return 0;
 }
 
-void mbedtls_pem_free( mbedtls_pem_context *ctx )
+void mbedtls_pem_free(mbedtls_pem_context *ctx)
 {
-    if ( ctx->buf != NULL )
-    {
-        mbedtls_platform_zeroize( ctx->buf, ctx->buflen );
-        mbedtls_free( ctx->buf );
+    if (ctx->buf != NULL) {
+        mbedtls_platform_zeroize(ctx->buf, ctx->buflen);
+        mbedtls_free(ctx->buf);
     }
-    mbedtls_free( ctx->info );
+    mbedtls_free(ctx->info);
 
-    mbedtls_platform_zeroize( ctx, sizeof( mbedtls_pem_context ) );
+    mbedtls_platform_zeroize(ctx, sizeof(mbedtls_pem_context));
 }
 #endif /* MBEDTLS_PEM_PARSE_C */
 
 #if defined(MBEDTLS_PEM_WRITE_C)
-int mbedtls_pem_write_buffer( const char *header, const char *footer,
-                      const unsigned char *der_data, size_t der_len,
-                      unsigned char *buf, size_t buf_len, size_t *olen )
+int mbedtls_pem_write_buffer(const char *header, const char *footer,
+                             const unsigned char *der_data, size_t der_len,
+                             unsigned char *buf, size_t buf_len, size_t *olen)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *encode_buf = NULL, *c, *p = buf;
     size_t len = 0, use_len, add_len = 0;
 
-    mbedtls_base64_encode( NULL, 0, &use_len, der_data, der_len );
-    add_len = strlen( header ) + strlen( footer ) + ( use_len / 64 ) + 1;
+    mbedtls_base64_encode(NULL, 0, &use_len, der_data, der_len);
+    add_len = strlen(header) + strlen(footer) + (use_len / 64) + 1;
 
-    if( use_len + add_len > buf_len )
-    {
+    if (use_len + add_len > buf_len) {
         *olen = use_len + add_len;
-        return( MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL );
+        return MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL;
     }
 
-    if( use_len != 0 &&
-        ( ( encode_buf = mbedtls_calloc( 1, use_len ) ) == NULL ) )
-        return( MBEDTLS_ERR_PEM_ALLOC_FAILED );
-
-    if( ( ret = mbedtls_base64_encode( encode_buf, use_len, &use_len, der_data,
-                               der_len ) ) != 0 )
-    {
-        mbedtls_free( encode_buf );
-        return( ret );
+    if (use_len != 0 &&
+        ((encode_buf = mbedtls_calloc(1, use_len)) == NULL)) {
+        return MBEDTLS_ERR_PEM_ALLOC_FAILED;
     }
 
-    memcpy( p, header, strlen( header ) );
-    p += strlen( header );
+    if ((ret = mbedtls_base64_encode(encode_buf, use_len, &use_len, der_data,
+                                     der_len)) != 0) {
+        mbedtls_free(encode_buf);
+        return ret;
+    }
+
+    memcpy(p, header, strlen(header));
+    p += strlen(header);
     c = encode_buf;
 
-    while( use_len )
-    {
-        len = ( use_len > 64 ) ? 64 : use_len;
-        memcpy( p, c, len );
+    while (use_len) {
+        len = (use_len > 64) ? 64 : use_len;
+        memcpy(p, c, len);
         use_len -= len;
         p += len;
         c += len;
         *p++ = '\n';
     }
 
-    memcpy( p, footer, strlen( footer ) );
-    p += strlen( footer );
+    memcpy(p, footer, strlen(footer));
+    p += strlen(footer);
 
     *p++ = '\0';
     *olen = p - buf;
 
-     /* Clean any remaining data previously written to the buffer */
-    memset( buf + *olen, 0, buf_len - *olen );
+    /* Clean any remaining data previously written to the buffer */
+    memset(buf + *olen, 0, buf_len - *olen);
 
-    mbedtls_free( encode_buf );
-    return( 0 );
+    mbedtls_free(encode_buf);
+    return 0;
 }
 #endif /* MBEDTLS_PEM_WRITE_C */
 #endif /* MBEDTLS_PEM_PARSE_C || MBEDTLS_PEM_WRITE_C */
-