diff --git a/library/chacha20.c b/library/chacha20.c
index d17c58c..cbb01f4 100644
--- a/library/chacha20.c
+++ b/library/chacha20.c
@@ -36,12 +36,12 @@
 
 #if !defined(MBEDTLS_CHACHA20_ALT)
 
-#define ROTL32( value, amount ) \
-    ( (uint32_t) ( (value) << (amount) ) | ( (value) >> ( 32 - (amount) ) ) )
+#define ROTL32(value, amount) \
+    ((uint32_t) ((value) << (amount)) | ((value) >> (32 - (amount))))
 
-#define CHACHA20_CTR_INDEX ( 12U )
+#define CHACHA20_CTR_INDEX (12U)
 
-#define CHACHA20_BLOCK_SIZE_BYTES ( 4U * 16U )
+#define CHACHA20_BLOCK_SIZE_BYTES (4U * 16U)
 
 /**
  * \brief           ChaCha20 quarter round operation.
@@ -58,31 +58,31 @@
  * \param c         The index of 'c' in the state.
  * \param d         The index of 'd' in the state.
  */
-static inline void chacha20_quarter_round( uint32_t state[16],
-                                           size_t a,
-                                           size_t b,
-                                           size_t c,
-                                           size_t d )
+static inline void chacha20_quarter_round(uint32_t state[16],
+                                          size_t a,
+                                          size_t b,
+                                          size_t c,
+                                          size_t d)
 {
     /* a += b; d ^= a; d <<<= 16; */
     state[a] += state[b];
     state[d] ^= state[a];
-    state[d] = ROTL32( state[d], 16 );
+    state[d] = ROTL32(state[d], 16);
 
     /* c += d; b ^= c; b <<<= 12 */
     state[c] += state[d];
     state[b] ^= state[c];
-    state[b] = ROTL32( state[b], 12 );
+    state[b] = ROTL32(state[b], 12);
 
     /* a += b; d ^= a; d <<<= 8; */
     state[a] += state[b];
     state[d] ^= state[a];
-    state[d] = ROTL32( state[d], 8 );
+    state[d] = ROTL32(state[d], 8);
 
     /* c += d; b ^= c; b <<<= 7; */
     state[c] += state[d];
     state[b] ^= state[c];
-    state[b] = ROTL32( state[b], 7 );
+    state[b] = ROTL32(state[b], 7);
 }
 
 /**
@@ -93,17 +93,17 @@
  *
  * \param state     The ChaCha20 state to update.
  */
-static void chacha20_inner_block( uint32_t state[16] )
+static void chacha20_inner_block(uint32_t state[16])
 {
-    chacha20_quarter_round( state, 0, 4, 8,  12 );
-    chacha20_quarter_round( state, 1, 5, 9,  13 );
-    chacha20_quarter_round( state, 2, 6, 10, 14 );
-    chacha20_quarter_round( state, 3, 7, 11, 15 );
+    chacha20_quarter_round(state, 0, 4, 8,  12);
+    chacha20_quarter_round(state, 1, 5, 9,  13);
+    chacha20_quarter_round(state, 2, 6, 10, 14);
+    chacha20_quarter_round(state, 3, 7, 11, 15);
 
-    chacha20_quarter_round( state, 0, 5, 10, 15 );
-    chacha20_quarter_round( state, 1, 6, 11, 12 );
-    chacha20_quarter_round( state, 2, 7, 8,  13 );
-    chacha20_quarter_round( state, 3, 4, 9,  14 );
+    chacha20_quarter_round(state, 0, 5, 10, 15);
+    chacha20_quarter_round(state, 1, 6, 11, 12);
+    chacha20_quarter_round(state, 2, 7, 8,  13);
+    chacha20_quarter_round(state, 3, 4, 9,  14);
 }
 
 /**
@@ -112,29 +112,30 @@
  * \param initial_state The initial ChaCha20 state (key, nonce, counter).
  * \param keystream     Generated keystream bytes are written to this buffer.
  */
-static void chacha20_block( const uint32_t initial_state[16],
-                            unsigned char keystream[64] )
+static void chacha20_block(const uint32_t initial_state[16],
+                           unsigned char keystream[64])
 {
     uint32_t working_state[16];
     size_t i;
 
-    memcpy( working_state,
-            initial_state,
-            CHACHA20_BLOCK_SIZE_BYTES );
+    memcpy(working_state,
+           initial_state,
+           CHACHA20_BLOCK_SIZE_BYTES);
 
-    for( i = 0U; i < 10U; i++ )
-        chacha20_inner_block( working_state );
+    for (i = 0U; i < 10U; i++) {
+        chacha20_inner_block(working_state);
+    }
 
-    working_state[ 0] += initial_state[ 0];
-    working_state[ 1] += initial_state[ 1];
-    working_state[ 2] += initial_state[ 2];
-    working_state[ 3] += initial_state[ 3];
-    working_state[ 4] += initial_state[ 4];
-    working_state[ 5] += initial_state[ 5];
-    working_state[ 6] += initial_state[ 6];
-    working_state[ 7] += initial_state[ 7];
-    working_state[ 8] += initial_state[ 8];
-    working_state[ 9] += initial_state[ 9];
+    working_state[0] += initial_state[0];
+    working_state[1] += initial_state[1];
+    working_state[2] += initial_state[2];
+    working_state[3] += initial_state[3];
+    working_state[4] += initial_state[4];
+    working_state[5] += initial_state[5];
+    working_state[6] += initial_state[6];
+    working_state[7] += initial_state[7];
+    working_state[8] += initial_state[8];
+    working_state[9] += initial_state[9];
     working_state[10] += initial_state[10];
     working_state[11] += initial_state[11];
     working_state[12] += initial_state[12];
@@ -142,35 +143,33 @@
     working_state[14] += initial_state[14];
     working_state[15] += initial_state[15];
 
-    for( i = 0U; i < 16; i++ )
-    {
+    for (i = 0U; i < 16; i++) {
         size_t offset = i * 4U;
 
         MBEDTLS_PUT_UINT32_LE(working_state[i], keystream, offset);
     }
 
-    mbedtls_platform_zeroize( working_state, sizeof( working_state ) );
+    mbedtls_platform_zeroize(working_state, sizeof(working_state));
 }
 
-void mbedtls_chacha20_init( mbedtls_chacha20_context *ctx )
+void mbedtls_chacha20_init(mbedtls_chacha20_context *ctx)
 {
-    mbedtls_platform_zeroize( ctx->state, sizeof( ctx->state ) );
-    mbedtls_platform_zeroize( ctx->keystream8, sizeof( ctx->keystream8 ) );
+    mbedtls_platform_zeroize(ctx->state, sizeof(ctx->state));
+    mbedtls_platform_zeroize(ctx->keystream8, sizeof(ctx->keystream8));
 
     /* Initially, there's no keystream bytes available */
     ctx->keystream_bytes_used = CHACHA20_BLOCK_SIZE_BYTES;
 }
 
-void mbedtls_chacha20_free( mbedtls_chacha20_context *ctx )
+void mbedtls_chacha20_free(mbedtls_chacha20_context *ctx)
 {
-    if( ctx != NULL )
-    {
-        mbedtls_platform_zeroize( ctx, sizeof( mbedtls_chacha20_context ) );
+    if (ctx != NULL) {
+        mbedtls_platform_zeroize(ctx, sizeof(mbedtls_chacha20_context));
     }
 }
 
-int mbedtls_chacha20_setkey( mbedtls_chacha20_context *ctx,
-                            const unsigned char key[32] )
+int mbedtls_chacha20_setkey(mbedtls_chacha20_context *ctx,
+                            const unsigned char key[32])
 {
     /* ChaCha20 constants - the string "expand 32-byte k" */
     ctx->state[0] = 0x61707865;
@@ -179,50 +178,49 @@
     ctx->state[3] = 0x6b206574;
 
     /* Set key */
-    ctx->state[4]  = MBEDTLS_GET_UINT32_LE( key, 0 );
-    ctx->state[5]  = MBEDTLS_GET_UINT32_LE( key, 4 );
-    ctx->state[6]  = MBEDTLS_GET_UINT32_LE( key, 8 );
-    ctx->state[7]  = MBEDTLS_GET_UINT32_LE( key, 12 );
-    ctx->state[8]  = MBEDTLS_GET_UINT32_LE( key, 16 );
-    ctx->state[9]  = MBEDTLS_GET_UINT32_LE( key, 20 );
-    ctx->state[10] = MBEDTLS_GET_UINT32_LE( key, 24 );
-    ctx->state[11] = MBEDTLS_GET_UINT32_LE( key, 28 );
+    ctx->state[4]  = MBEDTLS_GET_UINT32_LE(key, 0);
+    ctx->state[5]  = MBEDTLS_GET_UINT32_LE(key, 4);
+    ctx->state[6]  = MBEDTLS_GET_UINT32_LE(key, 8);
+    ctx->state[7]  = MBEDTLS_GET_UINT32_LE(key, 12);
+    ctx->state[8]  = MBEDTLS_GET_UINT32_LE(key, 16);
+    ctx->state[9]  = MBEDTLS_GET_UINT32_LE(key, 20);
+    ctx->state[10] = MBEDTLS_GET_UINT32_LE(key, 24);
+    ctx->state[11] = MBEDTLS_GET_UINT32_LE(key, 28);
 
-    return( 0 );
+    return 0;
 }
 
-int mbedtls_chacha20_starts( mbedtls_chacha20_context* ctx,
-                             const unsigned char nonce[12],
-                             uint32_t counter )
+int mbedtls_chacha20_starts(mbedtls_chacha20_context *ctx,
+                            const unsigned char nonce[12],
+                            uint32_t counter)
 {
     /* Counter */
     ctx->state[12] = counter;
 
     /* Nonce */
-    ctx->state[13] = MBEDTLS_GET_UINT32_LE( nonce, 0 );
-    ctx->state[14] = MBEDTLS_GET_UINT32_LE( nonce, 4 );
-    ctx->state[15] = MBEDTLS_GET_UINT32_LE( nonce, 8 );
+    ctx->state[13] = MBEDTLS_GET_UINT32_LE(nonce, 0);
+    ctx->state[14] = MBEDTLS_GET_UINT32_LE(nonce, 4);
+    ctx->state[15] = MBEDTLS_GET_UINT32_LE(nonce, 8);
 
-    mbedtls_platform_zeroize( ctx->keystream8, sizeof( ctx->keystream8 ) );
+    mbedtls_platform_zeroize(ctx->keystream8, sizeof(ctx->keystream8));
 
     /* Initially, there's no keystream bytes available */
     ctx->keystream_bytes_used = CHACHA20_BLOCK_SIZE_BYTES;
 
-    return( 0 );
+    return 0;
 }
 
-int mbedtls_chacha20_update( mbedtls_chacha20_context *ctx,
-                              size_t size,
-                              const unsigned char *input,
-                              unsigned char *output )
+int mbedtls_chacha20_update(mbedtls_chacha20_context *ctx,
+                            size_t size,
+                            const unsigned char *input,
+                            unsigned char *output)
 {
     size_t offset = 0U;
 
     /* Use leftover keystream bytes, if available */
-    while( size > 0U && ctx->keystream_bytes_used < CHACHA20_BLOCK_SIZE_BYTES )
-    {
+    while (size > 0U && ctx->keystream_bytes_used < CHACHA20_BLOCK_SIZE_BYTES) {
         output[offset] = input[offset]
-                       ^ ctx->keystream8[ctx->keystream_bytes_used];
+                         ^ ctx->keystream8[ctx->keystream_bytes_used];
 
         ctx->keystream_bytes_used++;
         offset++;
@@ -230,59 +228,59 @@
     }
 
     /* Process full blocks */
-    while( size >= CHACHA20_BLOCK_SIZE_BYTES )
-    {
+    while (size >= CHACHA20_BLOCK_SIZE_BYTES) {
         /* Generate new keystream block and increment counter */
-        chacha20_block( ctx->state, ctx->keystream8 );
+        chacha20_block(ctx->state, ctx->keystream8);
         ctx->state[CHACHA20_CTR_INDEX]++;
 
-        mbedtls_xor( output + offset, input + offset, ctx->keystream8, 64U );
+        mbedtls_xor(output + offset, input + offset, ctx->keystream8, 64U);
 
         offset += CHACHA20_BLOCK_SIZE_BYTES;
         size   -= CHACHA20_BLOCK_SIZE_BYTES;
     }
 
     /* Last (partial) block */
-    if( size > 0U )
-    {
+    if (size > 0U) {
         /* Generate new keystream block and increment counter */
-        chacha20_block( ctx->state, ctx->keystream8 );
+        chacha20_block(ctx->state, ctx->keystream8);
         ctx->state[CHACHA20_CTR_INDEX]++;
 
-        mbedtls_xor( output + offset, input + offset, ctx->keystream8, size );
+        mbedtls_xor(output + offset, input + offset, ctx->keystream8, size);
 
         ctx->keystream_bytes_used = size;
 
     }
 
-    return( 0 );
+    return 0;
 }
 
-int mbedtls_chacha20_crypt( const unsigned char key[32],
-                            const unsigned char nonce[12],
-                            uint32_t counter,
-                            size_t data_len,
-                            const unsigned char* input,
-                            unsigned char* output )
+int mbedtls_chacha20_crypt(const unsigned char key[32],
+                           const unsigned char nonce[12],
+                           uint32_t counter,
+                           size_t data_len,
+                           const unsigned char *input,
+                           unsigned char *output)
 {
     mbedtls_chacha20_context ctx;
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    mbedtls_chacha20_init( &ctx );
+    mbedtls_chacha20_init(&ctx);
 
-    ret = mbedtls_chacha20_setkey( &ctx, key );
-    if( ret != 0 )
+    ret = mbedtls_chacha20_setkey(&ctx, key);
+    if (ret != 0) {
         goto cleanup;
+    }
 
-    ret = mbedtls_chacha20_starts( &ctx, nonce, counter );
-    if( ret != 0 )
+    ret = mbedtls_chacha20_starts(&ctx, nonce, counter);
+    if (ret != 0) {
         goto cleanup;
+    }
 
-    ret = mbedtls_chacha20_update( &ctx, data_len, input, output );
+    ret = mbedtls_chacha20_update(&ctx, data_len, input, output);
 
 cleanup:
-    mbedtls_chacha20_free( &ctx );
-    return( ret );
+    mbedtls_chacha20_free(&ctx);
+    return ret;
 }
 
 #endif /* !MBEDTLS_CHACHA20_ALT */
@@ -458,50 +456,52 @@
 /* Make sure no other definition is already present. */
 #undef ASSERT
 
-#define ASSERT( cond, args )            \
+#define ASSERT(cond, args)            \
     do                                  \
     {                                   \
-        if( ! ( cond ) )                \
+        if (!(cond))                \
         {                               \
-            if( verbose != 0 )          \
-                mbedtls_printf args;    \
+            if (verbose != 0)          \
+            mbedtls_printf args;    \
                                         \
-            return( -1 );               \
+            return -1;               \
         }                               \
     }                                   \
-    while( 0 )
+    while (0)
 
-int mbedtls_chacha20_self_test( int verbose )
+int mbedtls_chacha20_self_test(int verbose)
 {
     unsigned char output[381];
     unsigned i;
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    for( i = 0U; i < 2U; i++ )
-    {
-        if( verbose != 0 )
-            mbedtls_printf( "  ChaCha20 test %u ", i );
+    for (i = 0U; i < 2U; i++) {
+        if (verbose != 0) {
+            mbedtls_printf("  ChaCha20 test %u ", i);
+        }
 
-        ret = mbedtls_chacha20_crypt( test_keys[i],
-                                      test_nonces[i],
-                                      test_counters[i],
-                                      test_lengths[i],
-                                      test_input[i],
-                                      output );
+        ret = mbedtls_chacha20_crypt(test_keys[i],
+                                     test_nonces[i],
+                                     test_counters[i],
+                                     test_lengths[i],
+                                     test_input[i],
+                                     output);
 
-        ASSERT( 0 == ret, ( "error code: %i\n", ret ) );
+        ASSERT(0 == ret, ("error code: %i\n", ret));
 
-        ASSERT( 0 == memcmp( output, test_output[i], test_lengths[i] ),
-                ( "failed (output)\n" ) );
+        ASSERT(0 == memcmp(output, test_output[i], test_lengths[i]),
+               ("failed (output)\n"));
 
-        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_SELF_TEST */