diff --git a/library/hmac_drbg.c b/library/hmac_drbg.c
index 69272fa..fabe002 100644
--- a/library/hmac_drbg.c
+++ b/library/hmac_drbg.c
@@ -42,9 +42,9 @@
 /*
  * HMAC_DRBG context initialization
  */
-void mbedtls_hmac_drbg_init( mbedtls_hmac_drbg_context *ctx )
+void mbedtls_hmac_drbg_init(mbedtls_hmac_drbg_context *ctx)
 {
-    memset( ctx, 0, sizeof( mbedtls_hmac_drbg_context ) );
+    memset(ctx, 0, sizeof(mbedtls_hmac_drbg_context));
 
     ctx->reseed_interval = MBEDTLS_HMAC_DRBG_RESEED_INTERVAL;
 }
@@ -52,74 +52,81 @@
 /*
  * HMAC_DRBG update, using optional additional data (10.1.2.2)
  */
-int mbedtls_hmac_drbg_update_ret( mbedtls_hmac_drbg_context *ctx,
-                                  const unsigned char *additional,
-                                  size_t add_len )
+int mbedtls_hmac_drbg_update_ret(mbedtls_hmac_drbg_context *ctx,
+                                 const unsigned char *additional,
+                                 size_t add_len)
 {
-    size_t md_len = mbedtls_md_get_size( ctx->md_ctx.md_info );
-    unsigned char rounds = ( additional != NULL && add_len != 0 ) ? 2 : 1;
+    size_t md_len = mbedtls_md_get_size(ctx->md_ctx.md_info);
+    unsigned char rounds = (additional != NULL && add_len != 0) ? 2 : 1;
     unsigned char sep[1];
     unsigned char K[MBEDTLS_MD_MAX_SIZE];
     int ret = MBEDTLS_ERR_MD_BAD_INPUT_DATA;
 
-    for( sep[0] = 0; sep[0] < rounds; sep[0]++ )
-    {
+    for (sep[0] = 0; sep[0] < rounds; sep[0]++) {
         /* Step 1 or 4 */
-        if( ( ret = mbedtls_md_hmac_reset( &ctx->md_ctx ) ) != 0 )
-            goto exit;
-        if( ( ret = mbedtls_md_hmac_update( &ctx->md_ctx,
-                                            ctx->V, md_len ) ) != 0 )
-            goto exit;
-        if( ( ret = mbedtls_md_hmac_update( &ctx->md_ctx,
-                                            sep, 1 ) ) != 0 )
-            goto exit;
-        if( rounds == 2 )
-        {
-            if( ( ret = mbedtls_md_hmac_update( &ctx->md_ctx,
-                                                additional, add_len ) ) != 0 )
+        if ((ret = mbedtls_md_hmac_reset(&ctx->md_ctx)) != 0) {
             goto exit;
         }
-        if( ( ret = mbedtls_md_hmac_finish( &ctx->md_ctx, K ) ) != 0 )
+        if ((ret = mbedtls_md_hmac_update(&ctx->md_ctx,
+                                          ctx->V, md_len)) != 0) {
             goto exit;
+        }
+        if ((ret = mbedtls_md_hmac_update(&ctx->md_ctx,
+                                          sep, 1)) != 0) {
+            goto exit;
+        }
+        if (rounds == 2) {
+            if ((ret = mbedtls_md_hmac_update(&ctx->md_ctx,
+                                              additional, add_len)) != 0) {
+                goto exit;
+            }
+        }
+        if ((ret = mbedtls_md_hmac_finish(&ctx->md_ctx, K)) != 0) {
+            goto exit;
+        }
 
         /* Step 2 or 5 */
-        if( ( ret = mbedtls_md_hmac_starts( &ctx->md_ctx, K, md_len ) ) != 0 )
+        if ((ret = mbedtls_md_hmac_starts(&ctx->md_ctx, K, md_len)) != 0) {
             goto exit;
-        if( ( ret = mbedtls_md_hmac_update( &ctx->md_ctx,
-                                            ctx->V, md_len ) ) != 0 )
+        }
+        if ((ret = mbedtls_md_hmac_update(&ctx->md_ctx,
+                                          ctx->V, md_len)) != 0) {
             goto exit;
-        if( ( ret = mbedtls_md_hmac_finish( &ctx->md_ctx, ctx->V ) ) != 0 )
+        }
+        if ((ret = mbedtls_md_hmac_finish(&ctx->md_ctx, ctx->V)) != 0) {
             goto exit;
+        }
     }
 
 exit:
-    mbedtls_platform_zeroize( K, sizeof( K ) );
-    return( ret );
+    mbedtls_platform_zeroize(K, sizeof(K));
+    return ret;
 }
 
 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
-void mbedtls_hmac_drbg_update( mbedtls_hmac_drbg_context *ctx,
-                               const unsigned char *additional,
-                               size_t add_len )
+void mbedtls_hmac_drbg_update(mbedtls_hmac_drbg_context *ctx,
+                              const unsigned char *additional,
+                              size_t add_len)
 {
-    (void) mbedtls_hmac_drbg_update_ret( ctx, additional, add_len );
+    (void) mbedtls_hmac_drbg_update_ret(ctx, additional, add_len);
 }
 #endif /* MBEDTLS_DEPRECATED_REMOVED */
 
 /*
  * Simplified HMAC_DRBG initialisation (for use with deterministic ECDSA)
  */
-int mbedtls_hmac_drbg_seed_buf( mbedtls_hmac_drbg_context *ctx,
-                        const mbedtls_md_info_t * md_info,
-                        const unsigned char *data, size_t data_len )
+int mbedtls_hmac_drbg_seed_buf(mbedtls_hmac_drbg_context *ctx,
+                               const mbedtls_md_info_t *md_info,
+                               const unsigned char *data, size_t data_len)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    if( ( ret = mbedtls_md_setup( &ctx->md_ctx, md_info, 1 ) ) != 0 )
-        return( ret );
+    if ((ret = mbedtls_md_setup(&ctx->md_ctx, md_info, 1)) != 0) {
+        return ret;
+    }
 
 #if defined(MBEDTLS_THREADING_C)
-    mbedtls_mutex_init( &ctx->mutex );
+    mbedtls_mutex_init(&ctx->mutex);
 #endif
 
     /*
@@ -127,15 +134,17 @@
      * Use the V memory location, which is currently all 0, to initialize the
      * MD context with an all-zero key. Then set V to its initial value.
      */
-    if( ( ret = mbedtls_md_hmac_starts( &ctx->md_ctx, ctx->V,
-                                        mbedtls_md_get_size( md_info ) ) ) != 0 )
-        return( ret );
-    memset( ctx->V, 0x01, mbedtls_md_get_size( md_info ) );
+    if ((ret = mbedtls_md_hmac_starts(&ctx->md_ctx, ctx->V,
+                                      mbedtls_md_get_size(md_info))) != 0) {
+        return ret;
+    }
+    memset(ctx->V, 0x01, mbedtls_md_get_size(md_info));
 
-    if( ( ret = mbedtls_hmac_drbg_update_ret( ctx, data, data_len ) ) != 0 )
-        return( ret );
+    if ((ret = mbedtls_hmac_drbg_update_ret(ctx, data, data_len)) != 0) {
+        return ret;
+    }
 
-    return( 0 );
+    return 0;
 }
 
 /*
@@ -143,9 +152,9 @@
  * Comments starting with arabic numbers refer to section 10.1.2.4
  * of SP800-90A, while roman numbers refer to section 9.2.
  */
-static int hmac_drbg_reseed_core( mbedtls_hmac_drbg_context *ctx,
-                                  const unsigned char *additional, size_t len,
-                                  int use_nonce )
+static int hmac_drbg_reseed_core(mbedtls_hmac_drbg_context *ctx,
+                                 const unsigned char *additional, size_t len,
+                                 int use_nonce)
 {
     unsigned char seed[MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT];
     size_t seedlen = 0;
@@ -154,33 +163,31 @@
     {
         size_t total_entropy_len;
 
-        if( use_nonce == 0 )
+        if (use_nonce == 0) {
             total_entropy_len = ctx->entropy_len;
-        else
+        } else {
             total_entropy_len = ctx->entropy_len * 3 / 2;
+        }
 
         /* III. Check input length */
-        if( len > MBEDTLS_HMAC_DRBG_MAX_INPUT ||
-            total_entropy_len + len > MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT )
-        {
-            return( MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG );
+        if (len > MBEDTLS_HMAC_DRBG_MAX_INPUT ||
+            total_entropy_len + len > MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT) {
+            return MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG;
         }
     }
 
-    memset( seed, 0, MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT );
+    memset(seed, 0, MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT);
 
     /* IV. Gather entropy_len bytes of entropy for the seed */
-    if( ( ret = ctx->f_entropy( ctx->p_entropy,
-                                seed, ctx->entropy_len ) ) != 0 )
-    {
-        return( MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED );
+    if ((ret = ctx->f_entropy(ctx->p_entropy,
+                              seed, ctx->entropy_len)) != 0) {
+        return MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED;
     }
     seedlen += ctx->entropy_len;
 
     /* For initial seeding, allow adding of nonce generated
      * from the entropy source. See Sect 8.6.7 in SP800-90A. */
-    if( use_nonce )
-    {
+    if (use_nonce) {
         /* Note: We don't merge the two calls to f_entropy() in order
          *       to avoid requesting too much entropy from f_entropy()
          *       at once. Specifically, if the underlying digest is not
@@ -188,11 +195,10 @@
          *       is larger than the maximum of 32 Bytes that our own
          *       entropy source implementation can emit in a single
          *       call in configurations disabling SHA-512. */
-        if( ( ret = ctx->f_entropy( ctx->p_entropy,
-                                    seed + seedlen,
-                                    ctx->entropy_len / 2 ) ) != 0 )
-        {
-            return( MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED );
+        if ((ret = ctx->f_entropy(ctx->p_entropy,
+                                  seed + seedlen,
+                                  ctx->entropy_len / 2)) != 0) {
+            return MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED;
         }
 
         seedlen += ctx->entropy_len / 2;
@@ -200,32 +206,32 @@
 
 
     /* 1. Concatenate entropy and additional data if any */
-    if( additional != NULL && len != 0 )
-    {
-        memcpy( seed + seedlen, additional, len );
+    if (additional != NULL && len != 0) {
+        memcpy(seed + seedlen, additional, len);
         seedlen += len;
     }
 
     /* 2. Update state */
-    if( ( ret = mbedtls_hmac_drbg_update_ret( ctx, seed, seedlen ) ) != 0 )
+    if ((ret = mbedtls_hmac_drbg_update_ret(ctx, seed, seedlen)) != 0) {
         goto exit;
+    }
 
     /* 3. Reset reseed_counter */
     ctx->reseed_counter = 1;
 
 exit:
     /* 4. Done */
-    mbedtls_platform_zeroize( seed, seedlen );
-    return( ret );
+    mbedtls_platform_zeroize(seed, seedlen);
+    return ret;
 }
 
 /*
  * HMAC_DRBG reseeding: 10.1.2.4 + 9.2
  */
-int mbedtls_hmac_drbg_reseed( mbedtls_hmac_drbg_context *ctx,
-                      const unsigned char *additional, size_t len )
+int mbedtls_hmac_drbg_reseed(mbedtls_hmac_drbg_context *ctx,
+                             const unsigned char *additional, size_t len)
 {
-    return( hmac_drbg_reseed_core( ctx, additional, len, 0 ) );
+    return hmac_drbg_reseed_core(ctx, additional, len, 0);
 }
 
 /*
@@ -234,40 +240,41 @@
  * The nonce is not passed as a separate parameter but extracted
  * from the entropy source as suggested in 8.6.7.
  */
-int mbedtls_hmac_drbg_seed( mbedtls_hmac_drbg_context *ctx,
-                    const mbedtls_md_info_t * md_info,
-                    int (*f_entropy)(void *, unsigned char *, size_t),
-                    void *p_entropy,
-                    const unsigned char *custom,
-                    size_t len )
+int mbedtls_hmac_drbg_seed(mbedtls_hmac_drbg_context *ctx,
+                           const mbedtls_md_info_t *md_info,
+                           int (*f_entropy)(void *, unsigned char *, size_t),
+                           void *p_entropy,
+                           const unsigned char *custom,
+                           size_t len)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t md_size;
 
-    if( ( ret = mbedtls_md_setup( &ctx->md_ctx, md_info, 1 ) ) != 0 )
-        return( ret );
+    if ((ret = mbedtls_md_setup(&ctx->md_ctx, md_info, 1)) != 0) {
+        return ret;
+    }
 
     /* The mutex is initialized iff the md context is set up. */
 #if defined(MBEDTLS_THREADING_C)
-    mbedtls_mutex_init( &ctx->mutex );
+    mbedtls_mutex_init(&ctx->mutex);
 #endif
 
-    md_size = mbedtls_md_get_size( md_info );
+    md_size = mbedtls_md_get_size(md_info);
 
     /*
      * Set initial working state.
      * Use the V memory location, which is currently all 0, to initialize the
      * MD context with an all-zero key. Then set V to its initial value.
      */
-    if( ( ret = mbedtls_md_hmac_starts( &ctx->md_ctx, ctx->V, md_size ) ) != 0 )
-        return( ret );
-    memset( ctx->V, 0x01, md_size );
+    if ((ret = mbedtls_md_hmac_starts(&ctx->md_ctx, ctx->V, md_size)) != 0) {
+        return ret;
+    }
+    memset(ctx->V, 0x01, md_size);
 
     ctx->f_entropy = f_entropy;
     ctx->p_entropy = p_entropy;
 
-    if( ctx->entropy_len == 0 )
-    {
+    if (ctx->entropy_len == 0) {
         /*
          * See SP800-57 5.6.1 (p. 65-66) for the security strength provided by
          * each hash function, then according to SP800-90A rev1 10.1 table 2,
@@ -280,20 +287,19 @@
                            32;  /* better (256+) -> 256 bits */
     }
 
-    if( ( ret = hmac_drbg_reseed_core( ctx, custom, len,
-                                       1 /* add nonce */ ) ) != 0 )
-    {
-        return( ret );
+    if ((ret = hmac_drbg_reseed_core(ctx, custom, len,
+                                     1 /* add nonce */)) != 0) {
+        return ret;
     }
 
-    return( 0 );
+    return 0;
 }
 
 /*
  * Set prediction resistance
  */
-void mbedtls_hmac_drbg_set_prediction_resistance( mbedtls_hmac_drbg_context *ctx,
-                                          int resistance )
+void mbedtls_hmac_drbg_set_prediction_resistance(mbedtls_hmac_drbg_context *ctx,
+                                                 int resistance)
 {
     ctx->prediction_resistance = resistance;
 }
@@ -301,7 +307,7 @@
 /*
  * Set entropy length grabbed for seeding
  */
-void mbedtls_hmac_drbg_set_entropy_len( mbedtls_hmac_drbg_context *ctx, size_t len )
+void mbedtls_hmac_drbg_set_entropy_len(mbedtls_hmac_drbg_context *ctx, size_t len)
 {
     ctx->entropy_len = len;
 }
@@ -309,7 +315,7 @@
 /*
  * Set reseed interval
  */
-void mbedtls_hmac_drbg_set_reseed_interval( mbedtls_hmac_drbg_context *ctx, int interval )
+void mbedtls_hmac_drbg_set_reseed_interval(mbedtls_hmac_drbg_context *ctx, int interval)
 {
     ctx->reseed_interval = interval;
 }
@@ -318,131 +324,141 @@
  * HMAC_DRBG random function with optional additional data:
  * 10.1.2.5 (arabic) + 9.3 (Roman)
  */
-int mbedtls_hmac_drbg_random_with_add( void *p_rng,
-                               unsigned char *output, size_t out_len,
-                               const unsigned char *additional, size_t add_len )
+int mbedtls_hmac_drbg_random_with_add(void *p_rng,
+                                      unsigned char *output, size_t out_len,
+                                      const unsigned char *additional, size_t add_len)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     mbedtls_hmac_drbg_context *ctx = (mbedtls_hmac_drbg_context *) p_rng;
-    size_t md_len = mbedtls_md_get_size( ctx->md_ctx.md_info );
+    size_t md_len = mbedtls_md_get_size(ctx->md_ctx.md_info);
     size_t left = out_len;
     unsigned char *out = output;
 
     /* II. Check request length */
-    if( out_len > MBEDTLS_HMAC_DRBG_MAX_REQUEST )
-        return( MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG );
+    if (out_len > MBEDTLS_HMAC_DRBG_MAX_REQUEST) {
+        return MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG;
+    }
 
     /* III. Check input length */
-    if( add_len > MBEDTLS_HMAC_DRBG_MAX_INPUT )
-        return( MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG );
+    if (add_len > MBEDTLS_HMAC_DRBG_MAX_INPUT) {
+        return MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG;
+    }
 
     /* 1. (aka VII and IX) Check reseed counter and PR */
-    if( ctx->f_entropy != NULL && /* For no-reseeding instances */
-        ( ctx->prediction_resistance == MBEDTLS_HMAC_DRBG_PR_ON ||
-          ctx->reseed_counter > ctx->reseed_interval ) )
-    {
-        if( ( ret = mbedtls_hmac_drbg_reseed( ctx, additional, add_len ) ) != 0 )
-            return( ret );
+    if (ctx->f_entropy != NULL && /* For no-reseeding instances */
+        (ctx->prediction_resistance == MBEDTLS_HMAC_DRBG_PR_ON ||
+         ctx->reseed_counter > ctx->reseed_interval)) {
+        if ((ret = mbedtls_hmac_drbg_reseed(ctx, additional, add_len)) != 0) {
+            return ret;
+        }
 
         add_len = 0; /* VII.4 */
     }
 
     /* 2. Use additional data if any */
-    if( additional != NULL && add_len != 0 )
-    {
-        if( ( ret = mbedtls_hmac_drbg_update_ret( ctx,
-                                                  additional, add_len ) ) != 0 )
+    if (additional != NULL && add_len != 0) {
+        if ((ret = mbedtls_hmac_drbg_update_ret(ctx,
+                                                additional, add_len)) != 0) {
             goto exit;
+        }
     }
 
     /* 3, 4, 5. Generate bytes */
-    while( left != 0 )
-    {
+    while (left != 0) {
         size_t use_len = left > md_len ? md_len : left;
 
-        if( ( ret = mbedtls_md_hmac_reset( &ctx->md_ctx ) ) != 0 )
+        if ((ret = mbedtls_md_hmac_reset(&ctx->md_ctx)) != 0) {
             goto exit;
-        if( ( ret = mbedtls_md_hmac_update( &ctx->md_ctx,
-                                            ctx->V, md_len ) ) != 0 )
+        }
+        if ((ret = mbedtls_md_hmac_update(&ctx->md_ctx,
+                                          ctx->V, md_len)) != 0) {
             goto exit;
-        if( ( ret = mbedtls_md_hmac_finish( &ctx->md_ctx, ctx->V ) ) != 0 )
+        }
+        if ((ret = mbedtls_md_hmac_finish(&ctx->md_ctx, ctx->V)) != 0) {
             goto exit;
+        }
 
-        memcpy( out, ctx->V, use_len );
+        memcpy(out, ctx->V, use_len);
         out += use_len;
         left -= use_len;
     }
 
     /* 6. Update */
-    if( ( ret = mbedtls_hmac_drbg_update_ret( ctx,
-                                              additional, add_len ) ) != 0 )
+    if ((ret = mbedtls_hmac_drbg_update_ret(ctx,
+                                            additional, add_len)) != 0) {
         goto exit;
+    }
 
     /* 7. Update reseed counter */
     ctx->reseed_counter++;
 
 exit:
     /* 8. Done */
-    return( ret );
+    return ret;
 }
 
 /*
  * HMAC_DRBG random function
  */
-int mbedtls_hmac_drbg_random( void *p_rng, unsigned char *output, size_t out_len )
+int mbedtls_hmac_drbg_random(void *p_rng, unsigned char *output, size_t out_len)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     mbedtls_hmac_drbg_context *ctx = (mbedtls_hmac_drbg_context *) p_rng;
 
 #if defined(MBEDTLS_THREADING_C)
-    if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
-        return( ret );
+    if ((ret = mbedtls_mutex_lock(&ctx->mutex)) != 0) {
+        return ret;
+    }
 #endif
 
-    ret = mbedtls_hmac_drbg_random_with_add( ctx, output, out_len, NULL, 0 );
+    ret = mbedtls_hmac_drbg_random_with_add(ctx, output, out_len, NULL, 0);
 
 #if defined(MBEDTLS_THREADING_C)
-    if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )
-        return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
+    if (mbedtls_mutex_unlock(&ctx->mutex) != 0) {
+        return MBEDTLS_ERR_THREADING_MUTEX_ERROR;
+    }
 #endif
 
-    return( ret );
+    return ret;
 }
 
 /*
  *  This function resets HMAC_DRBG context to the state immediately
  *  after initial call of mbedtls_hmac_drbg_init().
  */
-void mbedtls_hmac_drbg_free( mbedtls_hmac_drbg_context *ctx )
+void mbedtls_hmac_drbg_free(mbedtls_hmac_drbg_context *ctx)
 {
-    if( ctx == NULL )
+    if (ctx == NULL) {
         return;
+    }
 
 #if defined(MBEDTLS_THREADING_C)
     /* The mutex is initialized iff the md context is set up. */
-    if( ctx->md_ctx.md_info != NULL )
-        mbedtls_mutex_free( &ctx->mutex );
+    if (ctx->md_ctx.md_info != NULL) {
+        mbedtls_mutex_free(&ctx->mutex);
+    }
 #endif
-    mbedtls_md_free( &ctx->md_ctx );
-    mbedtls_platform_zeroize( ctx, sizeof( mbedtls_hmac_drbg_context ) );
+    mbedtls_md_free(&ctx->md_ctx);
+    mbedtls_platform_zeroize(ctx, sizeof(mbedtls_hmac_drbg_context));
     ctx->reseed_interval = MBEDTLS_HMAC_DRBG_RESEED_INTERVAL;
 }
 
 #if defined(MBEDTLS_FS_IO)
-int mbedtls_hmac_drbg_write_seed_file( mbedtls_hmac_drbg_context *ctx, const char *path )
+int mbedtls_hmac_drbg_write_seed_file(mbedtls_hmac_drbg_context *ctx, const char *path)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     FILE *f;
-    unsigned char buf[ MBEDTLS_HMAC_DRBG_MAX_INPUT ];
+    unsigned char buf[MBEDTLS_HMAC_DRBG_MAX_INPUT];
 
-    if( ( f = fopen( path, "wb" ) ) == NULL )
-        return( MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR );
+    if ((f = fopen(path, "wb")) == NULL) {
+        return MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR;
+    }
 
-    if( ( ret = mbedtls_hmac_drbg_random( ctx, buf, sizeof( buf ) ) ) != 0 )
+    if ((ret = mbedtls_hmac_drbg_random(ctx, buf, sizeof(buf))) != 0) {
         goto exit;
+    }
 
-    if( fwrite( buf, 1, sizeof( buf ), f ) != sizeof( buf ) )
-    {
+    if (fwrite(buf, 1, sizeof(buf), f) != sizeof(buf)) {
         ret = MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR;
         goto exit;
     }
@@ -450,46 +466,47 @@
     ret = 0;
 
 exit:
-    fclose( f );
-    mbedtls_platform_zeroize( buf, sizeof( buf ) );
+    fclose(f);
+    mbedtls_platform_zeroize(buf, sizeof(buf));
 
-    return( ret );
+    return ret;
 }
 
-int mbedtls_hmac_drbg_update_seed_file( mbedtls_hmac_drbg_context *ctx, const char *path )
+int mbedtls_hmac_drbg_update_seed_file(mbedtls_hmac_drbg_context *ctx, const char *path)
 {
     int ret = 0;
     FILE *f = NULL;
     size_t n;
-    unsigned char buf[ MBEDTLS_HMAC_DRBG_MAX_INPUT ];
+    unsigned char buf[MBEDTLS_HMAC_DRBG_MAX_INPUT];
     unsigned char c;
 
-    if( ( f = fopen( path, "rb" ) ) == NULL )
-        return( MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR );
+    if ((f = fopen(path, "rb")) == NULL) {
+        return MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR;
+    }
 
-    n = fread( buf, 1, sizeof( buf ), f );
-    if( fread( &c, 1, 1, f ) != 0 )
-    {
+    n = fread(buf, 1, sizeof(buf), f);
+    if (fread(&c, 1, 1, f) != 0) {
         ret = MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG;
         goto exit;
     }
-    if( n == 0 || ferror( f ) )
-    {
+    if (n == 0 || ferror(f)) {
         ret = MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR;
         goto exit;
     }
-    fclose( f );
+    fclose(f);
     f = NULL;
 
-    ret = mbedtls_hmac_drbg_update_ret( ctx, buf, n );
+    ret = mbedtls_hmac_drbg_update_ret(ctx, buf, n);
 
 exit:
-    mbedtls_platform_zeroize( buf, sizeof( buf ) );
-    if( f != NULL )
-        fclose( f );
-    if( ret != 0 )
-        return( ret );
-    return( mbedtls_hmac_drbg_write_seed_file( ctx, path ) );
+    mbedtls_platform_zeroize(buf, sizeof(buf));
+    if (f != NULL) {
+        fclose(f);
+    }
+    if (ret != 0) {
+        return ret;
+    }
+    return mbedtls_hmac_drbg_write_seed_file(ctx, path);
 }
 #endif /* MBEDTLS_FS_IO */
 
@@ -498,10 +515,10 @@
 
 #if !defined(MBEDTLS_SHA1_C)
 /* Dummy checkup routine */
-int mbedtls_hmac_drbg_self_test( int verbose )
+int mbedtls_hmac_drbg_self_test(int verbose)
 {
     (void) verbose;
-    return( 0 );
+    return 0;
 }
 #else
 
@@ -513,7 +530,8 @@
     0xf7, 0x3e, 0x9c, 0x5b, 0x64, 0xef, 0xd8, 0xca, 0x02, 0x8c, 0xf8, 0x11,
     0x48, 0xa5, 0x84, 0xfe, 0x69, 0xab, 0x5a, 0xee, 0x42, 0xaa, 0x4d, 0x42,
     0x17, 0x60, 0x99, 0xd4, 0x5e, 0x13, 0x97, 0xdc, 0x40, 0x4d, 0x86, 0xa3,
-    0x7b, 0xf5, 0x59, 0x54, 0x75, 0x69, 0x51, 0xe4 };
+    0x7b, 0xf5, 0x59, 0x54, 0x75, 0x69, 0x51, 0xe4
+};
 static const unsigned char result_pr[OUTPUT_LEN] = {
     0x9a, 0x00, 0xa2, 0xd0, 0x0e, 0xd5, 0x9b, 0xfe, 0x31, 0xec, 0xb1, 0x39,
     0x9b, 0x60, 0x81, 0x48, 0xd1, 0x96, 0x9d, 0x25, 0x0d, 0x3c, 0x1e, 0x94,
@@ -521,14 +539,16 @@
     0x73, 0x19, 0x70, 0xc0, 0x10, 0x7a, 0xa4, 0x89, 0x25, 0x19, 0x95, 0x5e,
     0x4b, 0xc6, 0x00, 0x1d, 0x7f, 0x4e, 0x6a, 0x2b, 0xf8, 0xa3, 0x01, 0xab,
     0x46, 0x05, 0x5c, 0x09, 0xa6, 0x71, 0x88, 0xf1, 0xa7, 0x40, 0xee, 0xf3,
-    0xe1, 0x5c, 0x02, 0x9b, 0x44, 0xaf, 0x03, 0x44 };
+    0xe1, 0x5c, 0x02, 0x9b, 0x44, 0xaf, 0x03, 0x44
+};
 
 /* From a NIST PR=false test vector */
 static const unsigned char entropy_nopr[] = {
     0x79, 0x34, 0x9b, 0xbf, 0x7c, 0xdd, 0xa5, 0x79, 0x95, 0x57, 0x86, 0x66,
     0x21, 0xc9, 0x13, 0x83, 0x11, 0x46, 0x73, 0x3a, 0xbf, 0x8c, 0x35, 0xc8,
     0xc7, 0x21, 0x5b, 0x5b, 0x96, 0xc4, 0x8e, 0x9b, 0x33, 0x8c, 0x74, 0xe3,
-    0xe9, 0x9d, 0xfe, 0xdf };
+    0xe9, 0x9d, 0xfe, 0xdf
+};
 static const unsigned char result_nopr[OUTPUT_LEN] = {
     0xc6, 0xa1, 0x6a, 0xb8, 0xd4, 0x20, 0x70, 0x6f, 0x0f, 0x34, 0xab, 0x7f,
     0xec, 0x5a, 0xdc, 0xa9, 0xd8, 0xca, 0x3a, 0x13, 0x3e, 0x15, 0x9c, 0xa6,
@@ -536,85 +556,91 @@
     0xff, 0xb1, 0x0d, 0x71, 0x94, 0xf1, 0xc1, 0xa5, 0xcf, 0x73, 0x22, 0xec,
     0x1a, 0xe0, 0x96, 0x4e, 0xd4, 0xbf, 0x12, 0x27, 0x46, 0xe0, 0x87, 0xfd,
     0xb5, 0xb3, 0xe9, 0x1b, 0x34, 0x93, 0xd5, 0xbb, 0x98, 0xfa, 0xed, 0x49,
-    0xe8, 0x5f, 0x13, 0x0f, 0xc8, 0xa4, 0x59, 0xb7 };
+    0xe8, 0x5f, 0x13, 0x0f, 0xc8, 0xa4, 0x59, 0xb7
+};
 
 /* "Entropy" from buffer */
 static size_t test_offset;
-static int hmac_drbg_self_test_entropy( void *data,
-                                        unsigned char *buf, size_t len )
+static int hmac_drbg_self_test_entropy(void *data,
+                                       unsigned char *buf, size_t len)
 {
     const unsigned char *p = data;
-    memcpy( buf, p + test_offset, len );
+    memcpy(buf, p + test_offset, len);
     test_offset += len;
-    return( 0 );
+    return 0;
 }
 
-#define CHK( c )    if( (c) != 0 )                          \
-                    {                                       \
-                        if( verbose != 0 )                  \
-                            mbedtls_printf( "failed\n" );  \
-                        return( 1 );                        \
-                    }
+#define CHK(c)    if ((c) != 0)                          \
+    {                                       \
+        if (verbose != 0)                  \
+        mbedtls_printf("failed\n");  \
+        return 1;                        \
+    }
 
 /*
  * Checkup routine for HMAC_DRBG with SHA-1
  */
-int mbedtls_hmac_drbg_self_test( int verbose )
+int mbedtls_hmac_drbg_self_test(int verbose)
 {
     mbedtls_hmac_drbg_context ctx;
     unsigned char buf[OUTPUT_LEN];
-    const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type( MBEDTLS_MD_SHA1 );
+    const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type(MBEDTLS_MD_SHA1);
 
-    mbedtls_hmac_drbg_init( &ctx );
+    mbedtls_hmac_drbg_init(&ctx);
 
     /*
      * PR = True
      */
-    if( verbose != 0 )
-        mbedtls_printf( "  HMAC_DRBG (PR = True) : " );
+    if (verbose != 0) {
+        mbedtls_printf("  HMAC_DRBG (PR = True) : ");
+    }
 
     test_offset = 0;
-    CHK( mbedtls_hmac_drbg_seed( &ctx, md_info,
-                         hmac_drbg_self_test_entropy, (void *) entropy_pr,
-                         NULL, 0 ) );
-    mbedtls_hmac_drbg_set_prediction_resistance( &ctx, MBEDTLS_HMAC_DRBG_PR_ON );
-    CHK( mbedtls_hmac_drbg_random( &ctx, buf, OUTPUT_LEN ) );
-    CHK( mbedtls_hmac_drbg_random( &ctx, buf, OUTPUT_LEN ) );
-    CHK( memcmp( buf, result_pr, OUTPUT_LEN ) );
-    mbedtls_hmac_drbg_free( &ctx );
+    CHK(mbedtls_hmac_drbg_seed(&ctx, md_info,
+                               hmac_drbg_self_test_entropy, (void *) entropy_pr,
+                               NULL, 0));
+    mbedtls_hmac_drbg_set_prediction_resistance(&ctx, MBEDTLS_HMAC_DRBG_PR_ON);
+    CHK(mbedtls_hmac_drbg_random(&ctx, buf, OUTPUT_LEN));
+    CHK(mbedtls_hmac_drbg_random(&ctx, buf, OUTPUT_LEN));
+    CHK(memcmp(buf, result_pr, OUTPUT_LEN));
+    mbedtls_hmac_drbg_free(&ctx);
 
-    mbedtls_hmac_drbg_free( &ctx );
+    mbedtls_hmac_drbg_free(&ctx);
 
-    if( verbose != 0 )
-        mbedtls_printf( "passed\n" );
+    if (verbose != 0) {
+        mbedtls_printf("passed\n");
+    }
 
     /*
      * PR = False
      */
-    if( verbose != 0 )
-        mbedtls_printf( "  HMAC_DRBG (PR = False) : " );
+    if (verbose != 0) {
+        mbedtls_printf("  HMAC_DRBG (PR = False) : ");
+    }
 
-    mbedtls_hmac_drbg_init( &ctx );
+    mbedtls_hmac_drbg_init(&ctx);
 
     test_offset = 0;
-    CHK( mbedtls_hmac_drbg_seed( &ctx, md_info,
-                         hmac_drbg_self_test_entropy, (void *) entropy_nopr,
-                         NULL, 0 ) );
-    CHK( mbedtls_hmac_drbg_reseed( &ctx, NULL, 0 ) );
-    CHK( mbedtls_hmac_drbg_random( &ctx, buf, OUTPUT_LEN ) );
-    CHK( mbedtls_hmac_drbg_random( &ctx, buf, OUTPUT_LEN ) );
-    CHK( memcmp( buf, result_nopr, OUTPUT_LEN ) );
-    mbedtls_hmac_drbg_free( &ctx );
+    CHK(mbedtls_hmac_drbg_seed(&ctx, md_info,
+                               hmac_drbg_self_test_entropy, (void *) entropy_nopr,
+                               NULL, 0));
+    CHK(mbedtls_hmac_drbg_reseed(&ctx, NULL, 0));
+    CHK(mbedtls_hmac_drbg_random(&ctx, buf, OUTPUT_LEN));
+    CHK(mbedtls_hmac_drbg_random(&ctx, buf, OUTPUT_LEN));
+    CHK(memcmp(buf, result_nopr, OUTPUT_LEN));
+    mbedtls_hmac_drbg_free(&ctx);
 
-    mbedtls_hmac_drbg_free( &ctx );
+    mbedtls_hmac_drbg_free(&ctx);
 
-    if( verbose != 0 )
-        mbedtls_printf( "passed\n" );
+    if (verbose != 0) {
+        mbedtls_printf("passed\n");
+    }
 
-    if( verbose != 0 )
-        mbedtls_printf( "\n" );
+    if (verbose != 0) {
+        mbedtls_printf("\n");
+    }
 
-    return( 0 );
+    return 0;
 }
 #endif /* MBEDTLS_SHA1_C */
 #endif /* MBEDTLS_SELF_TEST */