diff --git a/library/md.c b/library/md.c
index cfaeb45..0be1b7d 100644
--- a/library/md.c
+++ b/library/md.c
@@ -39,13 +39,7 @@
 #include "mbedtls/sha3.h"
 #endif
 
-#if defined(MBEDTLS_PLATFORM_C)
 #include "mbedtls/platform.h"
-#else
-#include <stdlib.h>
-#define mbedtls_calloc    calloc
-#define mbedtls_free       free
-#endif
 
 #include <string.h>
 
@@ -157,118 +151,129 @@
 #endif
 
 #if defined(MBEDTLS_SHA512_C)
-        MBEDTLS_MD_SHA512,
+    MBEDTLS_MD_SHA512,
 #endif
 
 #if defined(MBEDTLS_SHA384_C)
-        MBEDTLS_MD_SHA384,
+    MBEDTLS_MD_SHA384,
 #endif
 
 #if defined(MBEDTLS_SHA256_C)
-        MBEDTLS_MD_SHA256,
+    MBEDTLS_MD_SHA256,
 #endif
 #if defined(MBEDTLS_SHA224_C)
-        MBEDTLS_MD_SHA224,
+    MBEDTLS_MD_SHA224,
 #endif
 
 #if defined(MBEDTLS_SHA1_C)
-        MBEDTLS_MD_SHA1,
+    MBEDTLS_MD_SHA1,
 #endif
 
 #if defined(MBEDTLS_RIPEMD160_C)
-        MBEDTLS_MD_RIPEMD160,
+    MBEDTLS_MD_RIPEMD160,
 #endif
 
 #if defined(MBEDTLS_MD5_C)
-        MBEDTLS_MD_MD5,
+    MBEDTLS_MD_MD5,
 #endif
 
-        MBEDTLS_MD_NONE
+    MBEDTLS_MD_NONE
 };
 
-const int *mbedtls_md_list( void )
+const int *mbedtls_md_list(void)
 {
-    return( supported_digests );
+    return supported_digests;
 }
 
-const mbedtls_md_info_t *mbedtls_md_info_from_string( const char *md_name )
+const mbedtls_md_info_t *mbedtls_md_info_from_string(const char *md_name)
 {
-    if( NULL == md_name )
-        return( NULL );
+    if (NULL == md_name) {
+        return NULL;
+    }
 
     /* Get the appropriate digest information */
 #if defined(MBEDTLS_MD5_C)
-    if( !strcmp( "MD5", md_name ) )
-        return mbedtls_md_info_from_type( MBEDTLS_MD_MD5 );
+    if (!strcmp("MD5", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_MD5);
+    }
 #endif
 #if defined(MBEDTLS_RIPEMD160_C)
-    if( !strcmp( "RIPEMD160", md_name ) )
-        return mbedtls_md_info_from_type( MBEDTLS_MD_RIPEMD160 );
+    if (!strcmp("RIPEMD160", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_RIPEMD160);
+    }
 #endif
 #if defined(MBEDTLS_SHA1_C)
-    if( !strcmp( "SHA1", md_name ) || !strcmp( "SHA", md_name ) )
-        return mbedtls_md_info_from_type( MBEDTLS_MD_SHA1 );
+    if (!strcmp("SHA1", md_name) || !strcmp("SHA", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA1);
+    }
 #endif
 #if defined(MBEDTLS_SHA224_C)
-    if( !strcmp( "SHA224", md_name ) )
-        return mbedtls_md_info_from_type( MBEDTLS_MD_SHA224 );
+    if (!strcmp("SHA224", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA224);
+    }
 #endif
 #if defined(MBEDTLS_SHA256_C)
-    if( !strcmp( "SHA256", md_name ) )
-        return mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 );
+    if (!strcmp("SHA256", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA256);
+    }
 #endif
 #if defined(MBEDTLS_SHA384_C)
-    if( !strcmp( "SHA384", md_name ) )
-        return mbedtls_md_info_from_type( MBEDTLS_MD_SHA384 );
+    if (!strcmp("SHA384", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA384);
+    }
 #endif
 #if defined(MBEDTLS_SHA512_C)
-    if( !strcmp( "SHA512", md_name ) )
-        return mbedtls_md_info_from_type( MBEDTLS_MD_SHA512 );
+    if (!strcmp("SHA512", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA512);
+    }
 #endif
 #if defined(MBEDTLS_SHA3_C)
-    if( !strcmp( "SHA3-224", md_name ) )
-        return mbedtls_md_info_from_type( MBEDTLS_MD_SHA3_224 );
-    if( !strcmp( "SHA3-256", md_name ) )
-        return mbedtls_md_info_from_type( MBEDTLS_MD_SHA3_256 );
-    if( !strcmp( "SHA3-384", md_name ) )
-        return mbedtls_md_info_from_type( MBEDTLS_MD_SHA3_384 );
-    if( !strcmp( "SHA3-512", md_name ) )
-        return mbedtls_md_info_from_type( MBEDTLS_MD_SHA3_512 );
+    if (!strcmp("SHA3-224", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA3_224);
+    }
+    if (!strcmp("SHA3-256", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA3_256);
+    }
+    if (!strcmp("SHA3-384", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA3_384);
+    }
+    if (!strcmp("SHA3-512", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA3_512);
+    }
 #endif
-    return( NULL );
+    return NULL;
 }
 
-const mbedtls_md_info_t *mbedtls_md_info_from_type( mbedtls_md_type_t md_type )
+const mbedtls_md_info_t *mbedtls_md_info_from_type(mbedtls_md_type_t md_type)
 {
-    switch( md_type )
-    {
+    switch (md_type) {
 #if defined(MBEDTLS_MD5_C)
         case MBEDTLS_MD_MD5:
-            return( &mbedtls_md5_info );
+            return &mbedtls_md5_info;
 #endif
 #if defined(MBEDTLS_RIPEMD160_C)
         case MBEDTLS_MD_RIPEMD160:
-            return( &mbedtls_ripemd160_info );
+            return &mbedtls_ripemd160_info;
 #endif
 #if defined(MBEDTLS_SHA1_C)
         case MBEDTLS_MD_SHA1:
-            return( &mbedtls_sha1_info );
+            return &mbedtls_sha1_info;
 #endif
 #if defined(MBEDTLS_SHA224_C)
         case MBEDTLS_MD_SHA224:
-            return( &mbedtls_sha224_info );
+            return &mbedtls_sha224_info;
 #endif
 #if defined(MBEDTLS_SHA256_C)
         case MBEDTLS_MD_SHA256:
-            return( &mbedtls_sha256_info );
+            return &mbedtls_sha256_info;
 #endif
 #if defined(MBEDTLS_SHA384_C)
         case MBEDTLS_MD_SHA384:
-            return( &mbedtls_sha384_info );
+            return &mbedtls_sha384_info;
 #endif
 #if defined(MBEDTLS_SHA512_C)
         case MBEDTLS_MD_SHA512:
-            return( &mbedtls_sha512_info );
+            return &mbedtls_sha512_info;
 #endif
 #if defined(MBEDTLS_SHA3_C)
         case MBEDTLS_MD_SHA3_224:
@@ -281,66 +286,66 @@
             return( &mbedtls_sha3_512_info );
 #endif
         default:
-            return( NULL );
+            return NULL;
     }
 }
 
 const mbedtls_md_info_t *mbedtls_md_info_from_ctx(
-                                            const mbedtls_md_context_t *ctx )
+    const mbedtls_md_context_t *ctx)
 {
-    if( ctx == NULL )
+    if (ctx == NULL) {
         return NULL;
+    }
 
-    return( ctx->MBEDTLS_PRIVATE(md_info) );
+    return ctx->MBEDTLS_PRIVATE(md_info);
 }
 
-void mbedtls_md_init( mbedtls_md_context_t *ctx )
+void mbedtls_md_init(mbedtls_md_context_t *ctx)
 {
-    memset( ctx, 0, sizeof( mbedtls_md_context_t ) );
+    memset(ctx, 0, sizeof(mbedtls_md_context_t));
 }
 
-void mbedtls_md_free( mbedtls_md_context_t *ctx )
+void mbedtls_md_free(mbedtls_md_context_t *ctx)
 {
-    if( ctx == NULL || ctx->md_info == NULL )
+    if (ctx == NULL || ctx->md_info == NULL) {
         return;
+    }
 
-    if( ctx->md_ctx != NULL )
-    {
-        switch( ctx->md_info->type )
-        {
+    if (ctx->md_ctx != NULL) {
+        switch (ctx->md_info->type) {
 #if defined(MBEDTLS_MD5_C)
             case MBEDTLS_MD_MD5:
-                mbedtls_md5_free( ctx->md_ctx );
+                mbedtls_md5_free(ctx->md_ctx);
                 break;
 #endif
 #if defined(MBEDTLS_RIPEMD160_C)
             case MBEDTLS_MD_RIPEMD160:
-                mbedtls_ripemd160_free( ctx->md_ctx );
+                mbedtls_ripemd160_free(ctx->md_ctx);
                 break;
 #endif
 #if defined(MBEDTLS_SHA1_C)
             case MBEDTLS_MD_SHA1:
-                mbedtls_sha1_free( ctx->md_ctx );
+                mbedtls_sha1_free(ctx->md_ctx);
                 break;
 #endif
 #if defined(MBEDTLS_SHA224_C)
             case MBEDTLS_MD_SHA224:
-                mbedtls_sha256_free( ctx->md_ctx );
+                mbedtls_sha256_free(ctx->md_ctx);
                 break;
 #endif
 #if defined(MBEDTLS_SHA256_C)
             case MBEDTLS_MD_SHA256:
-                mbedtls_sha256_free( ctx->md_ctx );
+                mbedtls_sha256_free(ctx->md_ctx);
                 break;
 #endif
 #if defined(MBEDTLS_SHA384_C)
             case MBEDTLS_MD_SHA384:
-                mbedtls_sha512_free( ctx->md_ctx );
+                mbedtls_sha512_free(ctx->md_ctx);
                 break;
 #endif
 #if defined(MBEDTLS_SHA512_C)
             case MBEDTLS_MD_SHA512:
-                mbedtls_sha512_free( ctx->md_ctx );
+                mbedtls_sha512_free(ctx->md_ctx);
                 break;
 #endif
 #if defined(MBEDTLS_SHA3_C)
@@ -355,64 +360,61 @@
                 /* Shouldn't happen */
                 break;
         }
-        mbedtls_free( ctx->md_ctx );
+        mbedtls_free(ctx->md_ctx);
     }
 
-    if( ctx->hmac_ctx != NULL )
-    {
-        mbedtls_platform_zeroize( ctx->hmac_ctx,
-                                  2 * ctx->md_info->block_size );
-        mbedtls_free( ctx->hmac_ctx );
+    if (ctx->hmac_ctx != NULL) {
+        mbedtls_platform_zeroize(ctx->hmac_ctx,
+                                 2 * ctx->md_info->block_size);
+        mbedtls_free(ctx->hmac_ctx);
     }
 
-    mbedtls_platform_zeroize( ctx, sizeof( mbedtls_md_context_t ) );
+    mbedtls_platform_zeroize(ctx, sizeof(mbedtls_md_context_t));
 }
 
-int mbedtls_md_clone( mbedtls_md_context_t *dst,
-                      const mbedtls_md_context_t *src )
+int mbedtls_md_clone(mbedtls_md_context_t *dst,
+                     const mbedtls_md_context_t *src)
 {
-    if( dst == NULL || dst->md_info == NULL ||
+    if (dst == NULL || dst->md_info == NULL ||
         src == NULL || src->md_info == NULL ||
-        dst->md_info != src->md_info )
-    {
-        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+        dst->md_info != src->md_info) {
+        return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
     }
 
-    switch( src->md_info->type )
-    {
+    switch (src->md_info->type) {
 #if defined(MBEDTLS_MD5_C)
         case MBEDTLS_MD_MD5:
-            mbedtls_md5_clone( dst->md_ctx, src->md_ctx );
+            mbedtls_md5_clone(dst->md_ctx, src->md_ctx);
             break;
 #endif
 #if defined(MBEDTLS_RIPEMD160_C)
         case MBEDTLS_MD_RIPEMD160:
-            mbedtls_ripemd160_clone( dst->md_ctx, src->md_ctx );
+            mbedtls_ripemd160_clone(dst->md_ctx, src->md_ctx);
             break;
 #endif
 #if defined(MBEDTLS_SHA1_C)
         case MBEDTLS_MD_SHA1:
-            mbedtls_sha1_clone( dst->md_ctx, src->md_ctx );
+            mbedtls_sha1_clone(dst->md_ctx, src->md_ctx);
             break;
 #endif
 #if defined(MBEDTLS_SHA224_C)
         case MBEDTLS_MD_SHA224:
-            mbedtls_sha256_clone( dst->md_ctx, src->md_ctx );
+            mbedtls_sha256_clone(dst->md_ctx, src->md_ctx);
             break;
 #endif
 #if defined(MBEDTLS_SHA256_C)
         case MBEDTLS_MD_SHA256:
-            mbedtls_sha256_clone( dst->md_ctx, src->md_ctx );
+            mbedtls_sha256_clone(dst->md_ctx, src->md_ctx);
             break;
 #endif
 #if defined(MBEDTLS_SHA384_C)
         case MBEDTLS_MD_SHA384:
-            mbedtls_sha512_clone( dst->md_ctx, src->md_ctx );
+            mbedtls_sha512_clone(dst->md_ctx, src->md_ctx);
             break;
 #endif
 #if defined(MBEDTLS_SHA512_C)
         case MBEDTLS_MD_SHA512:
-            mbedtls_sha512_clone( dst->md_ctx, src->md_ctx );
+            mbedtls_sha512_clone(dst->md_ctx, src->md_ctx);
             break;
 #endif
 #if defined(MBEDTLS_SHA3_C)
@@ -424,65 +426,65 @@
             break;
 #endif
         default:
-            return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+            return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
     }
 
-    return( 0 );
+    return 0;
 }
 
-#define ALLOC( type )                                                   \
+#define ALLOC(type)                                                   \
     do {                                                                \
-        ctx->md_ctx = mbedtls_calloc( 1, sizeof( mbedtls_##type##_context ) ); \
-        if( ctx->md_ctx == NULL )                                       \
-            return( MBEDTLS_ERR_MD_ALLOC_FAILED );                      \
-        mbedtls_##type##_init( ctx->md_ctx );                           \
+        ctx->md_ctx = mbedtls_calloc(1, sizeof(mbedtls_##type##_context)); \
+        if (ctx->md_ctx == NULL)                                       \
+        return MBEDTLS_ERR_MD_ALLOC_FAILED;                      \
+        mbedtls_##type##_init(ctx->md_ctx);                           \
     }                                                                   \
-    while( 0 )
+    while (0)
 
-int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac )
+int mbedtls_md_setup(mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac)
 {
-    if( md_info == NULL || ctx == NULL )
-        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+    if (md_info == NULL || ctx == NULL) {
+        return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
+    }
 
     ctx->md_info = md_info;
     ctx->md_ctx = NULL;
     ctx->hmac_ctx = NULL;
 
-    switch( md_info->type )
-    {
+    switch (md_info->type) {
 #if defined(MBEDTLS_MD5_C)
         case MBEDTLS_MD_MD5:
-            ALLOC( md5 );
+            ALLOC(md5);
             break;
 #endif
 #if defined(MBEDTLS_RIPEMD160_C)
         case MBEDTLS_MD_RIPEMD160:
-            ALLOC( ripemd160 );
+            ALLOC(ripemd160);
             break;
 #endif
 #if defined(MBEDTLS_SHA1_C)
         case MBEDTLS_MD_SHA1:
-            ALLOC( sha1 );
+            ALLOC(sha1);
             break;
 #endif
 #if defined(MBEDTLS_SHA224_C)
         case MBEDTLS_MD_SHA224:
-            ALLOC( sha256 );
+            ALLOC(sha256);
             break;
 #endif
 #if defined(MBEDTLS_SHA256_C)
         case MBEDTLS_MD_SHA256:
-            ALLOC( sha256 );
+            ALLOC(sha256);
             break;
 #endif
 #if defined(MBEDTLS_SHA384_C)
         case MBEDTLS_MD_SHA384:
-            ALLOC( sha512 );
+            ALLOC(sha512);
             break;
 #endif
 #if defined(MBEDTLS_SHA512_C)
         case MBEDTLS_MD_SHA512:
-            ALLOC( sha512 );
+            ALLOC(sha512);
             break;
 #endif
 #if defined(MBEDTLS_SHA3_C)
@@ -494,57 +496,55 @@
             break;
 #endif
         default:
-            return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+            return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
     }
 
-    if( hmac != 0 )
-    {
-        ctx->hmac_ctx = mbedtls_calloc( 2, md_info->block_size );
-        if( ctx->hmac_ctx == NULL )
-        {
-            mbedtls_md_free( ctx );
-            return( MBEDTLS_ERR_MD_ALLOC_FAILED );
+    if (hmac != 0) {
+        ctx->hmac_ctx = mbedtls_calloc(2, md_info->block_size);
+        if (ctx->hmac_ctx == NULL) {
+            mbedtls_md_free(ctx);
+            return MBEDTLS_ERR_MD_ALLOC_FAILED;
         }
     }
 
-    return( 0 );
+    return 0;
 }
 #undef ALLOC
 
-int mbedtls_md_starts( mbedtls_md_context_t *ctx )
+int mbedtls_md_starts(mbedtls_md_context_t *ctx)
 {
-    if( ctx == NULL || ctx->md_info == NULL )
-        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+    if (ctx == NULL || ctx->md_info == NULL) {
+        return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
+    }
 
-    switch( ctx->md_info->type )
-    {
+    switch (ctx->md_info->type) {
 #if defined(MBEDTLS_MD5_C)
         case MBEDTLS_MD_MD5:
-            return( mbedtls_md5_starts( ctx->md_ctx ) );
+            return mbedtls_md5_starts(ctx->md_ctx);
 #endif
 #if defined(MBEDTLS_RIPEMD160_C)
         case MBEDTLS_MD_RIPEMD160:
-            return( mbedtls_ripemd160_starts( ctx->md_ctx ) );
+            return mbedtls_ripemd160_starts(ctx->md_ctx);
 #endif
 #if defined(MBEDTLS_SHA1_C)
         case MBEDTLS_MD_SHA1:
-            return( mbedtls_sha1_starts( ctx->md_ctx ) );
+            return mbedtls_sha1_starts(ctx->md_ctx);
 #endif
 #if defined(MBEDTLS_SHA224_C)
         case MBEDTLS_MD_SHA224:
-            return( mbedtls_sha256_starts( ctx->md_ctx, 1 ) );
+            return mbedtls_sha256_starts(ctx->md_ctx, 1);
 #endif
 #if defined(MBEDTLS_SHA256_C)
         case MBEDTLS_MD_SHA256:
-            return( mbedtls_sha256_starts( ctx->md_ctx, 0 ) );
+            return mbedtls_sha256_starts(ctx->md_ctx, 0);
 #endif
 #if defined(MBEDTLS_SHA384_C)
         case MBEDTLS_MD_SHA384:
-            return( mbedtls_sha512_starts( ctx->md_ctx, 1 ) );
+            return mbedtls_sha512_starts(ctx->md_ctx, 1);
 #endif
 #if defined(MBEDTLS_SHA512_C)
         case MBEDTLS_MD_SHA512:
-            return( mbedtls_sha512_starts( ctx->md_ctx, 0 ) );
+            return mbedtls_sha512_starts(ctx->md_ctx, 0);
 #endif
 #if defined(MBEDTLS_SHA3_C)
         case MBEDTLS_MD_SHA3_224:
@@ -557,44 +557,44 @@
             return( mbedtls_sha3_starts( ctx->md_ctx, MBEDTLS_SHA3_512 ) );
 #endif
         default:
-            return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+            return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
     }
 }
 
-int mbedtls_md_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen )
+int mbedtls_md_update(mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen)
 {
-    if( ctx == NULL || ctx->md_info == NULL )
-        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+    if (ctx == NULL || ctx->md_info == NULL) {
+        return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
+    }
 
-    switch( ctx->md_info->type )
-    {
+    switch (ctx->md_info->type) {
 #if defined(MBEDTLS_MD5_C)
         case MBEDTLS_MD_MD5:
-            return( mbedtls_md5_update( ctx->md_ctx, input, ilen ) );
+            return mbedtls_md5_update(ctx->md_ctx, input, ilen);
 #endif
 #if defined(MBEDTLS_RIPEMD160_C)
         case MBEDTLS_MD_RIPEMD160:
-            return( mbedtls_ripemd160_update( ctx->md_ctx, input, ilen ) );
+            return mbedtls_ripemd160_update(ctx->md_ctx, input, ilen);
 #endif
 #if defined(MBEDTLS_SHA1_C)
         case MBEDTLS_MD_SHA1:
-            return( mbedtls_sha1_update( ctx->md_ctx, input, ilen ) );
+            return mbedtls_sha1_update(ctx->md_ctx, input, ilen);
 #endif
 #if defined(MBEDTLS_SHA224_C)
         case MBEDTLS_MD_SHA224:
-            return( mbedtls_sha256_update( ctx->md_ctx, input, ilen ) );
+            return mbedtls_sha256_update(ctx->md_ctx, input, ilen);
 #endif
 #if defined(MBEDTLS_SHA256_C)
         case MBEDTLS_MD_SHA256:
-            return( mbedtls_sha256_update( ctx->md_ctx, input, ilen ) );
+            return mbedtls_sha256_update(ctx->md_ctx, input, ilen);
 #endif
 #if defined(MBEDTLS_SHA384_C)
         case MBEDTLS_MD_SHA384:
-            return( mbedtls_sha512_update( ctx->md_ctx, input, ilen ) );
+            return mbedtls_sha512_update(ctx->md_ctx, input, ilen);
 #endif
 #if defined(MBEDTLS_SHA512_C)
         case MBEDTLS_MD_SHA512:
-            return( mbedtls_sha512_update( ctx->md_ctx, input, ilen ) );
+            return mbedtls_sha512_update(ctx->md_ctx, input, ilen);
 #endif
 #if defined(MBEDTLS_SHA3_C)
         case MBEDTLS_MD_SHA3_224:
@@ -604,44 +604,44 @@
             return( mbedtls_sha3_update( ctx->md_ctx, input, ilen ) );
 #endif
         default:
-            return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+            return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
     }
 }
 
-int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output )
+int mbedtls_md_finish(mbedtls_md_context_t *ctx, unsigned char *output)
 {
-    if( ctx == NULL || ctx->md_info == NULL )
-        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+    if (ctx == NULL || ctx->md_info == NULL) {
+        return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
+    }
 
-    switch( ctx->md_info->type )
-    {
+    switch (ctx->md_info->type) {
 #if defined(MBEDTLS_MD5_C)
         case MBEDTLS_MD_MD5:
-            return( mbedtls_md5_finish( ctx->md_ctx, output ) );
+            return mbedtls_md5_finish(ctx->md_ctx, output);
 #endif
 #if defined(MBEDTLS_RIPEMD160_C)
         case MBEDTLS_MD_RIPEMD160:
-            return( mbedtls_ripemd160_finish( ctx->md_ctx, output ) );
+            return mbedtls_ripemd160_finish(ctx->md_ctx, output);
 #endif
 #if defined(MBEDTLS_SHA1_C)
         case MBEDTLS_MD_SHA1:
-            return( mbedtls_sha1_finish( ctx->md_ctx, output ) );
+            return mbedtls_sha1_finish(ctx->md_ctx, output);
 #endif
 #if defined(MBEDTLS_SHA224_C)
         case MBEDTLS_MD_SHA224:
-            return( mbedtls_sha256_finish( ctx->md_ctx, output ) );
+            return mbedtls_sha256_finish(ctx->md_ctx, output);
 #endif
 #if defined(MBEDTLS_SHA256_C)
         case MBEDTLS_MD_SHA256:
-            return( mbedtls_sha256_finish( ctx->md_ctx, output ) );
+            return mbedtls_sha256_finish(ctx->md_ctx, output);
 #endif
 #if defined(MBEDTLS_SHA384_C)
         case MBEDTLS_MD_SHA384:
-            return( mbedtls_sha512_finish( ctx->md_ctx, output ) );
+            return mbedtls_sha512_finish(ctx->md_ctx, output);
 #endif
 #if defined(MBEDTLS_SHA512_C)
         case MBEDTLS_MD_SHA512:
-            return( mbedtls_sha512_finish( ctx->md_ctx, output ) );
+            return mbedtls_sha512_finish(ctx->md_ctx, output);
 #endif
 #if defined(MBEDTLS_SHA3_C)
         case MBEDTLS_MD_SHA3_224:
@@ -651,45 +651,45 @@
             return( mbedtls_sha3_finish( ctx->md_ctx, output, ctx->md_info->size ) );
 #endif
         default:
-            return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+            return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
     }
 }
 
-int mbedtls_md( const mbedtls_md_info_t *md_info, const unsigned char *input, size_t ilen,
-            unsigned char *output )
+int mbedtls_md(const mbedtls_md_info_t *md_info, const unsigned char *input, size_t ilen,
+               unsigned char *output)
 {
-    if( md_info == NULL )
-        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+    if (md_info == NULL) {
+        return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
+    }
 
-    switch( md_info->type )
-    {
+    switch (md_info->type) {
 #if defined(MBEDTLS_MD5_C)
         case MBEDTLS_MD_MD5:
-            return( mbedtls_md5( input, ilen, output ) );
+            return mbedtls_md5(input, ilen, output);
 #endif
 #if defined(MBEDTLS_RIPEMD160_C)
         case MBEDTLS_MD_RIPEMD160:
-            return( mbedtls_ripemd160( input, ilen, output ) );
+            return mbedtls_ripemd160(input, ilen, output);
 #endif
 #if defined(MBEDTLS_SHA1_C)
         case MBEDTLS_MD_SHA1:
-            return( mbedtls_sha1( input, ilen, output ) );
+            return mbedtls_sha1(input, ilen, output);
 #endif
 #if defined(MBEDTLS_SHA224_C)
         case MBEDTLS_MD_SHA224:
-            return( mbedtls_sha256( input, ilen, output, 1 ) );
+            return mbedtls_sha256(input, ilen, output, 1);
 #endif
 #if defined(MBEDTLS_SHA256_C)
         case MBEDTLS_MD_SHA256:
-            return( mbedtls_sha256( input, ilen, output, 0 ) );
+            return mbedtls_sha256(input, ilen, output, 0);
 #endif
 #if defined(MBEDTLS_SHA384_C)
         case MBEDTLS_MD_SHA384:
-            return( mbedtls_sha512( input, ilen, output, 1 ) );
+            return mbedtls_sha512(input, ilen, output, 1);
 #endif
 #if defined(MBEDTLS_SHA512_C)
         case MBEDTLS_MD_SHA512:
-            return( mbedtls_sha512( input, ilen, output, 0 ) );
+            return mbedtls_sha512(input, ilen, output, 0);
 #endif
 #if defined(MBEDTLS_SHA3_C)
         case MBEDTLS_MD_SHA3_224:
@@ -702,12 +702,12 @@
             return( mbedtls_sha3( MBEDTLS_SHA3_512, input, ilen, output, md_info->size ) );
 #endif
         default:
-            return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+            return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
     }
 }
 
 #if defined(MBEDTLS_FS_IO)
-int mbedtls_md_file( const mbedtls_md_info_t *md_info, const char *path, unsigned char *output )
+int mbedtls_md_file(const mbedtls_md_info_t *md_info, const char *path, unsigned char *output)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     FILE *f;
@@ -715,59 +715,68 @@
     mbedtls_md_context_t ctx;
     unsigned char buf[1024];
 
-    if( md_info == NULL )
-        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+    if (md_info == NULL) {
+        return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
+    }
 
-    if( ( f = fopen( path, "rb" ) ) == NULL )
-        return( MBEDTLS_ERR_MD_FILE_IO_ERROR );
+    if ((f = fopen(path, "rb")) == NULL) {
+        return MBEDTLS_ERR_MD_FILE_IO_ERROR;
+    }
 
     /* Ensure no stdio buffering of secrets, as such buffers cannot be wiped. */
-    mbedtls_setbuf( f, NULL );
+    mbedtls_setbuf(f, NULL);
 
-    mbedtls_md_init( &ctx );
+    mbedtls_md_init(&ctx);
 
-    if( ( ret = mbedtls_md_setup( &ctx, md_info, 0 ) ) != 0 )
+    if ((ret = mbedtls_md_setup(&ctx, md_info, 0)) != 0) {
         goto cleanup;
+    }
 
-    if( ( ret = mbedtls_md_starts( &ctx ) ) != 0 )
+    if ((ret = mbedtls_md_starts(&ctx)) != 0) {
         goto cleanup;
+    }
 
-    while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
-        if( ( ret = mbedtls_md_update( &ctx, buf, n ) ) != 0 )
+    while ((n = fread(buf, 1, sizeof(buf), f)) > 0) {
+        if ((ret = mbedtls_md_update(&ctx, buf, n)) != 0) {
             goto cleanup;
+        }
+    }
 
-    if( ferror( f ) != 0 )
+    if (ferror(f) != 0) {
         ret = MBEDTLS_ERR_MD_FILE_IO_ERROR;
-    else
-        ret = mbedtls_md_finish( &ctx, output );
+    } else {
+        ret = mbedtls_md_finish(&ctx, output);
+    }
 
 cleanup:
-    mbedtls_platform_zeroize( buf, sizeof( buf ) );
-    fclose( f );
-    mbedtls_md_free( &ctx );
+    mbedtls_platform_zeroize(buf, sizeof(buf));
+    fclose(f);
+    mbedtls_md_free(&ctx);
 
-    return( ret );
+    return ret;
 }
 #endif /* MBEDTLS_FS_IO */
 
-int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key, size_t keylen )
+int mbedtls_md_hmac_starts(mbedtls_md_context_t *ctx, const unsigned char *key, size_t keylen)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char sum[MBEDTLS_MD_MAX_SIZE];
     unsigned char *ipad, *opad;
-    size_t i;
 
-    if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
-        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+    if (ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL) {
+        return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
+    }
 
-    if( keylen > (size_t) ctx->md_info->block_size )
-    {
-        if( ( ret = mbedtls_md_starts( ctx ) ) != 0 )
+    if (keylen > (size_t) ctx->md_info->block_size) {
+        if ((ret = mbedtls_md_starts(ctx)) != 0) {
             goto cleanup;
-        if( ( ret = mbedtls_md_update( ctx, key, keylen ) ) != 0 )
+        }
+        if ((ret = mbedtls_md_update(ctx, key, keylen)) != 0) {
             goto cleanup;
-        if( ( ret = mbedtls_md_finish( ctx, sum ) ) != 0 )
+        }
+        if ((ret = mbedtls_md_finish(ctx, sum)) != 0) {
             goto cleanup;
+        }
 
         keylen = ctx->md_info->size;
         key = sum;
@@ -776,137 +785,149 @@
     ipad = (unsigned char *) ctx->hmac_ctx;
     opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
 
-    memset( ipad, 0x36, ctx->md_info->block_size );
-    memset( opad, 0x5C, ctx->md_info->block_size );
+    memset(ipad, 0x36, ctx->md_info->block_size);
+    memset(opad, 0x5C, ctx->md_info->block_size);
 
-    for( i = 0; i < keylen; i++ )
-    {
-        ipad[i] = (unsigned char)( ipad[i] ^ key[i] );
-        opad[i] = (unsigned char)( opad[i] ^ key[i] );
+    mbedtls_xor(ipad, ipad, key, keylen);
+    mbedtls_xor(opad, opad, key, keylen);
+
+    if ((ret = mbedtls_md_starts(ctx)) != 0) {
+        goto cleanup;
+    }
+    if ((ret = mbedtls_md_update(ctx, ipad,
+                                 ctx->md_info->block_size)) != 0) {
+        goto cleanup;
     }
 
-    if( ( ret = mbedtls_md_starts( ctx ) ) != 0 )
-        goto cleanup;
-    if( ( ret = mbedtls_md_update( ctx, ipad,
-                                   ctx->md_info->block_size ) ) != 0 )
-        goto cleanup;
-
 cleanup:
-    mbedtls_platform_zeroize( sum, sizeof( sum ) );
+    mbedtls_platform_zeroize(sum, sizeof(sum));
 
-    return( ret );
+    return ret;
 }
 
-int mbedtls_md_hmac_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen )
+int mbedtls_md_hmac_update(mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen)
 {
-    if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
-        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+    if (ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL) {
+        return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
+    }
 
-    return( mbedtls_md_update( ctx, input, ilen ) );
+    return mbedtls_md_update(ctx, input, ilen);
 }
 
-int mbedtls_md_hmac_finish( mbedtls_md_context_t *ctx, unsigned char *output )
+int mbedtls_md_hmac_finish(mbedtls_md_context_t *ctx, unsigned char *output)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char tmp[MBEDTLS_MD_MAX_SIZE];
     unsigned char *opad;
 
-    if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
-        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+    if (ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL) {
+        return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
+    }
 
     opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
 
-    if( ( ret = mbedtls_md_finish( ctx, tmp ) ) != 0 )
-        return( ret );
-    if( ( ret = mbedtls_md_starts( ctx ) ) != 0 )
-        return( ret );
-    if( ( ret = mbedtls_md_update( ctx, opad,
-                                   ctx->md_info->block_size ) ) != 0 )
-        return( ret );
-    if( ( ret = mbedtls_md_update( ctx, tmp,
-                                   ctx->md_info->size ) ) != 0 )
-        return( ret );
-    return( mbedtls_md_finish( ctx, output ) );
+    if ((ret = mbedtls_md_finish(ctx, tmp)) != 0) {
+        return ret;
+    }
+    if ((ret = mbedtls_md_starts(ctx)) != 0) {
+        return ret;
+    }
+    if ((ret = mbedtls_md_update(ctx, opad,
+                                 ctx->md_info->block_size)) != 0) {
+        return ret;
+    }
+    if ((ret = mbedtls_md_update(ctx, tmp,
+                                 ctx->md_info->size)) != 0) {
+        return ret;
+    }
+    return mbedtls_md_finish(ctx, output);
 }
 
-int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx )
+int mbedtls_md_hmac_reset(mbedtls_md_context_t *ctx)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *ipad;
 
-    if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
-        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+    if (ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL) {
+        return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
+    }
 
     ipad = (unsigned char *) ctx->hmac_ctx;
 
-    if( ( ret = mbedtls_md_starts( ctx ) ) != 0 )
-        return( ret );
-    return( mbedtls_md_update( ctx, ipad, ctx->md_info->block_size ) );
+    if ((ret = mbedtls_md_starts(ctx)) != 0) {
+        return ret;
+    }
+    return mbedtls_md_update(ctx, ipad, ctx->md_info->block_size);
 }
 
-int mbedtls_md_hmac( const mbedtls_md_info_t *md_info,
-                     const unsigned char *key, size_t keylen,
-                     const unsigned char *input, size_t ilen,
-                     unsigned char *output )
+int mbedtls_md_hmac(const mbedtls_md_info_t *md_info,
+                    const unsigned char *key, size_t keylen,
+                    const unsigned char *input, size_t ilen,
+                    unsigned char *output)
 {
     mbedtls_md_context_t ctx;
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    if( md_info == NULL )
-        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+    if (md_info == NULL) {
+        return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
+    }
 
-    mbedtls_md_init( &ctx );
+    mbedtls_md_init(&ctx);
 
-    if( ( ret = mbedtls_md_setup( &ctx, md_info, 1 ) ) != 0 )
+    if ((ret = mbedtls_md_setup(&ctx, md_info, 1)) != 0) {
         goto cleanup;
+    }
 
-    if( ( ret = mbedtls_md_hmac_starts( &ctx, key, keylen ) ) != 0 )
+    if ((ret = mbedtls_md_hmac_starts(&ctx, key, keylen)) != 0) {
         goto cleanup;
-    if( ( ret = mbedtls_md_hmac_update( &ctx, input, ilen ) ) != 0 )
+    }
+    if ((ret = mbedtls_md_hmac_update(&ctx, input, ilen)) != 0) {
         goto cleanup;
-    if( ( ret = mbedtls_md_hmac_finish( &ctx, output ) ) != 0 )
+    }
+    if ((ret = mbedtls_md_hmac_finish(&ctx, output)) != 0) {
         goto cleanup;
+    }
 
 cleanup:
-    mbedtls_md_free( &ctx );
+    mbedtls_md_free(&ctx);
 
-    return( ret );
+    return ret;
 }
 
-int mbedtls_md_process( mbedtls_md_context_t *ctx, const unsigned char *data )
+int mbedtls_md_process(mbedtls_md_context_t *ctx, const unsigned char *data)
 {
-    if( ctx == NULL || ctx->md_info == NULL )
-        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+    if (ctx == NULL || ctx->md_info == NULL) {
+        return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
+    }
 
-    switch( ctx->md_info->type )
-    {
+    switch (ctx->md_info->type) {
 #if defined(MBEDTLS_MD5_C)
         case MBEDTLS_MD_MD5:
-            return( mbedtls_internal_md5_process( ctx->md_ctx, data ) );
+            return mbedtls_internal_md5_process(ctx->md_ctx, data);
 #endif
 #if defined(MBEDTLS_RIPEMD160_C)
         case MBEDTLS_MD_RIPEMD160:
-            return( mbedtls_internal_ripemd160_process( ctx->md_ctx, data ) );
+            return mbedtls_internal_ripemd160_process(ctx->md_ctx, data);
 #endif
 #if defined(MBEDTLS_SHA1_C)
         case MBEDTLS_MD_SHA1:
-            return( mbedtls_internal_sha1_process( ctx->md_ctx, data ) );
+            return mbedtls_internal_sha1_process(ctx->md_ctx, data);
 #endif
 #if defined(MBEDTLS_SHA224_C)
         case MBEDTLS_MD_SHA224:
-            return( mbedtls_internal_sha256_process( ctx->md_ctx, data ) );
+            return mbedtls_internal_sha256_process(ctx->md_ctx, data);
 #endif
 #if defined(MBEDTLS_SHA256_C)
         case MBEDTLS_MD_SHA256:
-            return( mbedtls_internal_sha256_process( ctx->md_ctx, data ) );
+            return mbedtls_internal_sha256_process(ctx->md_ctx, data);
 #endif
 #if defined(MBEDTLS_SHA384_C)
         case MBEDTLS_MD_SHA384:
-            return( mbedtls_internal_sha512_process( ctx->md_ctx, data ) );
+            return mbedtls_internal_sha512_process(ctx->md_ctx, data);
 #endif
 #if defined(MBEDTLS_SHA512_C)
         case MBEDTLS_MD_SHA512:
-            return( mbedtls_internal_sha512_process( ctx->md_ctx, data ) );
+            return mbedtls_internal_sha512_process(ctx->md_ctx, data);
 #endif
 #if defined(MBEDTLS_SHA3_C)
         /* mbedtls_md_process() is used for test suite. Since, sha3.c does not
@@ -918,30 +939,33 @@
             return( 0 );
 #endif
         default:
-            return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+            return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
     }
 }
 
-unsigned char mbedtls_md_get_size( const mbedtls_md_info_t *md_info )
+unsigned char mbedtls_md_get_size(const mbedtls_md_info_t *md_info)
 {
-    if( md_info == NULL )
-        return( 0 );
+    if (md_info == NULL) {
+        return 0;
+    }
 
     return md_info->size;
 }
 
-mbedtls_md_type_t mbedtls_md_get_type( const mbedtls_md_info_t *md_info )
+mbedtls_md_type_t mbedtls_md_get_type(const mbedtls_md_info_t *md_info)
 {
-    if( md_info == NULL )
-        return( MBEDTLS_MD_NONE );
+    if (md_info == NULL) {
+        return MBEDTLS_MD_NONE;
+    }
 
     return md_info->type;
 }
 
-const char *mbedtls_md_get_name( const mbedtls_md_info_t *md_info )
+const char *mbedtls_md_get_name(const mbedtls_md_info_t *md_info)
 {
-    if( md_info == NULL )
-        return( NULL );
+    if (md_info == NULL) {
+        return NULL;
+    }
 
     return md_info->name;
 }