diff --git a/library/sha256.c b/library/sha256.c
index 017bac6..86a371a 100644
--- a/library/sha256.c
+++ b/library/sha256.c
@@ -26,73 +26,73 @@
 
 #if defined(MBEDTLS_SHA256_C)
 
-#include "mbedtls/sha256.h"
-#include "mbedtls/platform_util.h"
-#include "mbedtls/error.h"
+#    include "mbedtls/sha256.h"
+#    include "mbedtls/platform_util.h"
+#    include "mbedtls/error.h"
 
-#include <string.h>
+#    include <string.h>
 
-#if defined(MBEDTLS_SELF_TEST)
-#if defined(MBEDTLS_PLATFORM_C)
-#include "mbedtls/platform.h"
-#else
-#include <stdio.h>
-#include <stdlib.h>
-#define mbedtls_printf printf
-#define mbedtls_calloc    calloc
-#define mbedtls_free       free
-#endif /* MBEDTLS_PLATFORM_C */
-#endif /* MBEDTLS_SELF_TEST */
+#    if defined(MBEDTLS_SELF_TEST)
+#        if defined(MBEDTLS_PLATFORM_C)
+#            include "mbedtls/platform.h"
+#        else
+#            include <stdio.h>
+#            include <stdlib.h>
+#            define mbedtls_printf printf
+#            define mbedtls_calloc calloc
+#            define mbedtls_free   free
+#        endif /* MBEDTLS_PLATFORM_C */
+#    endif /* MBEDTLS_SELF_TEST */
 
-#define SHA256_VALIDATE_RET(cond)                           \
-    MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_SHA256_BAD_INPUT_DATA )
-#define SHA256_VALIDATE(cond)  MBEDTLS_INTERNAL_VALIDATE( cond )
+#    define SHA256_VALIDATE_RET(cond) \
+        MBEDTLS_INTERNAL_VALIDATE_RET(cond, MBEDTLS_ERR_SHA256_BAD_INPUT_DATA)
+#    define SHA256_VALIDATE(cond) MBEDTLS_INTERNAL_VALIDATE(cond)
 
-#if !defined(MBEDTLS_SHA256_ALT)
+#    if !defined(MBEDTLS_SHA256_ALT)
 
 /*
  * 32-bit integer manipulation macros (big endian)
  */
-#ifndef GET_UINT32_BE
-#define GET_UINT32_BE(n,b,i)                            \
-do {                                                    \
-    (n) = ( (uint32_t) (b)[(i)    ] << 24 )             \
-        | ( (uint32_t) (b)[(i) + 1] << 16 )             \
-        | ( (uint32_t) (b)[(i) + 2] <<  8 )             \
-        | ( (uint32_t) (b)[(i) + 3]       );            \
-} while( 0 )
-#endif
+#        ifndef GET_UINT32_BE
+#            define GET_UINT32_BE(n, b, i)                 \
+                do {                                       \
+                    (n) = ((uint32_t)(b)[(i)] << 24) |     \
+                          ((uint32_t)(b)[(i) + 1] << 16) | \
+                          ((uint32_t)(b)[(i) + 2] << 8) |  \
+                          ((uint32_t)(b)[(i) + 3]);        \
+                } while (0)
+#        endif
 
-#ifndef PUT_UINT32_BE
-#define PUT_UINT32_BE(n,b,i)                            \
-do {                                                    \
-    (b)[(i)    ] = (unsigned char) ( (n) >> 24 );       \
-    (b)[(i) + 1] = (unsigned char) ( (n) >> 16 );       \
-    (b)[(i) + 2] = (unsigned char) ( (n) >>  8 );       \
-    (b)[(i) + 3] = (unsigned char) ( (n)       );       \
-} while( 0 )
-#endif
+#        ifndef PUT_UINT32_BE
+#            define PUT_UINT32_BE(n, b, i)                     \
+                do {                                           \
+                    (b)[(i)] = (unsigned char)((n) >> 24);     \
+                    (b)[(i) + 1] = (unsigned char)((n) >> 16); \
+                    (b)[(i) + 2] = (unsigned char)((n) >> 8);  \
+                    (b)[(i) + 3] = (unsigned char)((n));       \
+                } while (0)
+#        endif
 
-void mbedtls_sha256_init( mbedtls_sha256_context *ctx )
+void mbedtls_sha256_init(mbedtls_sha256_context *ctx)
 {
-    SHA256_VALIDATE( ctx != NULL );
+    SHA256_VALIDATE(ctx != NULL);
 
-    memset( ctx, 0, sizeof( mbedtls_sha256_context ) );
+    memset(ctx, 0, sizeof(mbedtls_sha256_context));
 }
 
-void mbedtls_sha256_free( mbedtls_sha256_context *ctx )
+void mbedtls_sha256_free(mbedtls_sha256_context *ctx)
 {
-    if( ctx == NULL )
+    if (ctx == NULL)
         return;
 
-    mbedtls_platform_zeroize( ctx, sizeof( mbedtls_sha256_context ) );
+    mbedtls_platform_zeroize(ctx, sizeof(mbedtls_sha256_context));
 }
 
-void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
-                           const mbedtls_sha256_context *src )
+void mbedtls_sha256_clone(mbedtls_sha256_context *dst,
+                          const mbedtls_sha256_context *src)
 {
-    SHA256_VALIDATE( dst != NULL );
-    SHA256_VALIDATE( src != NULL );
+    SHA256_VALIDATE(dst != NULL);
+    SHA256_VALIDATE(src != NULL);
 
     *dst = *src;
 }
@@ -100,21 +100,20 @@
 /*
  * SHA-256 context setup
  */
-int mbedtls_sha256_starts( mbedtls_sha256_context *ctx, int is224 )
+int mbedtls_sha256_starts(mbedtls_sha256_context *ctx, int is224)
 {
-    SHA256_VALIDATE_RET( ctx != NULL );
+    SHA256_VALIDATE_RET(ctx != NULL);
 
-#if defined(MBEDTLS_SHA224_C)
-    SHA256_VALIDATE_RET( is224 == 0 || is224 == 1 );
-#else
-    SHA256_VALIDATE_RET( is224 == 0 );
-#endif
+#        if defined(MBEDTLS_SHA224_C)
+    SHA256_VALIDATE_RET(is224 == 0 || is224 == 1);
+#        else
+    SHA256_VALIDATE_RET(is224 == 0);
+#        endif
 
     ctx->total[0] = 0;
     ctx->total[1] = 0;
 
-    if( is224 == 0 )
-    {
+    if (is224 == 0) {
         /* SHA-256 */
         ctx->state[0] = 0x6A09E667;
         ctx->state[1] = 0xBB67AE85;
@@ -124,10 +123,8 @@
         ctx->state[5] = 0x9B05688C;
         ctx->state[6] = 0x1F83D9AB;
         ctx->state[7] = 0x5BE0CD19;
-    }
-    else
-    {
-#if defined(MBEDTLS_SHA224_C)
+    } else {
+#        if defined(MBEDTLS_SHA224_C)
         /* SHA-224 */
         ctx->state[0] = 0xC1059ED8;
         ctx->state[1] = 0x367CD507;
@@ -137,216 +134,205 @@
         ctx->state[5] = 0x68581511;
         ctx->state[6] = 0x64F98FA7;
         ctx->state[7] = 0xBEFA4FA4;
-#endif
+#        endif
     }
 
     ctx->is224 = is224;
 
-    return 0 ;
+    return 0;
 }
 
-#if !defined(MBEDTLS_SHA256_PROCESS_ALT)
-static const uint32_t K[] =
-{
-    0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
-    0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
-    0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
-    0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
-    0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
-    0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
-    0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
-    0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
-    0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
-    0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
-    0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
-    0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
-    0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
-    0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
-    0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
+#        if !defined(MBEDTLS_SHA256_PROCESS_ALT)
+static const uint32_t K[] = {
+    0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5, 0x3956C25B, 0x59F111F1,
+    0x923F82A4, 0xAB1C5ED5, 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
+    0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174, 0xE49B69C1, 0xEFBE4786,
+    0x0FC19DC6, 0x240CA1CC, 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
+    0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7, 0xC6E00BF3, 0xD5A79147,
+    0x06CA6351, 0x14292967, 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
+    0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85, 0xA2BFE8A1, 0xA81A664B,
+    0xC24B8B70, 0xC76C51A3, 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
+    0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5, 0x391C0CB3, 0x4ED8AA4A,
+    0x5B9CCA4F, 0x682E6FF3, 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
     0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2,
 };
 
-#define  SHR(x,n) (((x) & 0xFFFFFFFF) >> (n))
-#define ROTR(x,n) (SHR(x,n) | ((x) << (32 - (n))))
+#            define SHR(x, n)  (((x)&0xFFFFFFFF) >> (n))
+#            define ROTR(x, n) (SHR(x, n) | ((x) << (32 - (n))))
 
-#define S0(x) (ROTR(x, 7) ^ ROTR(x,18) ^  SHR(x, 3))
-#define S1(x) (ROTR(x,17) ^ ROTR(x,19) ^  SHR(x,10))
+#            define S0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3))
+#            define S1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10))
 
-#define S2(x) (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))
-#define S3(x) (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))
+#            define S2(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
+#            define S3(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
 
-#define F0(x,y,z) (((x) & (y)) | ((z) & ((x) | (y))))
-#define F1(x,y,z) ((z) ^ ((x) & ((y) ^ (z))))
+#            define F0(x, y, z) (((x) & (y)) | ((z) & ((x) | (y))))
+#            define F1(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
 
-#define R(t)                                                        \
-    (                                                               \
-        local.W[t] = S1(local.W[(t) -  2]) + local.W[(t) -  7] +    \
-                     S0(local.W[(t) - 15]) + local.W[(t) - 16]      \
-    )
+#            define R(t)                                            \
+                (local.W[t] = S1(local.W[(t)-2]) + local.W[(t)-7] + \
+                              S0(local.W[(t)-15]) + local.W[(t)-16])
 
-#define P(a,b,c,d,e,f,g,h,x,K)                                      \
-    do                                                              \
-    {                                                               \
-        local.temp1 = (h) + S3(e) + F1((e),(f),(g)) + (K) + (x);    \
-        local.temp2 = S2(a) + F0((a),(b),(c));                      \
-        (d) += local.temp1; (h) = local.temp1 + local.temp2;        \
-    } while( 0 )
+#            define P(a, b, c, d, e, f, g, h, x, K)                            \
+                do {                                                           \
+                    local.temp1 = (h) + S3(e) + F1((e), (f), (g)) + (K) + (x); \
+                    local.temp2 = S2(a) + F0((a), (b), (c));                   \
+                    (d) += local.temp1;                                        \
+                    (h) = local.temp1 + local.temp2;                           \
+                } while (0)
 
-int mbedtls_internal_sha256_process( mbedtls_sha256_context *ctx,
-                                const unsigned char data[64] )
+int mbedtls_internal_sha256_process(mbedtls_sha256_context *ctx,
+                                    const unsigned char data[64])
 {
-    struct
-    {
+    struct {
         uint32_t temp1, temp2, W[64];
         uint32_t A[8];
     } local;
 
     unsigned int i;
 
-    SHA256_VALIDATE_RET( ctx != NULL );
-    SHA256_VALIDATE_RET( (const unsigned char *)data != NULL );
+    SHA256_VALIDATE_RET(ctx != NULL);
+    SHA256_VALIDATE_RET((const unsigned char *)data != NULL);
 
-    for( i = 0; i < 8; i++ )
+    for (i = 0; i < 8; i++)
         local.A[i] = ctx->state[i];
 
-#if defined(MBEDTLS_SHA256_SMALLER)
-    for( i = 0; i < 64; i++ )
-    {
-        if( i < 16 )
-            GET_UINT32_BE( local.W[i], data, 4 * i );
+#            if defined(MBEDTLS_SHA256_SMALLER)
+    for (i = 0; i < 64; i++) {
+        if (i < 16)
+            GET_UINT32_BE(local.W[i], data, 4 * i);
         else
-            R( i );
+            R(i);
 
-        P( local.A[0], local.A[1], local.A[2], local.A[3], local.A[4],
-           local.A[5], local.A[6], local.A[7], local.W[i], K[i] );
+        P(local.A[0], local.A[1], local.A[2], local.A[3], local.A[4],
+          local.A[5], local.A[6], local.A[7], local.W[i], K[i]);
 
-        local.temp1 = local.A[7]; local.A[7] = local.A[6];
-        local.A[6] = local.A[5]; local.A[5] = local.A[4];
-        local.A[4] = local.A[3]; local.A[3] = local.A[2];
-        local.A[2] = local.A[1]; local.A[1] = local.A[0];
+        local.temp1 = local.A[7];
+        local.A[7] = local.A[6];
+        local.A[6] = local.A[5];
+        local.A[5] = local.A[4];
+        local.A[4] = local.A[3];
+        local.A[3] = local.A[2];
+        local.A[2] = local.A[1];
+        local.A[1] = local.A[0];
         local.A[0] = local.temp1;
     }
-#else /* MBEDTLS_SHA256_SMALLER */
-    for( i = 0; i < 16; i++ )
-        GET_UINT32_BE( local.W[i], data, 4 * i );
+#            else /* MBEDTLS_SHA256_SMALLER */
+    for (i = 0; i < 16; i++)
+        GET_UINT32_BE(local.W[i], data, 4 * i);
 
-    for( i = 0; i < 16; i += 8 )
-    {
-        P( local.A[0], local.A[1], local.A[2], local.A[3], local.A[4],
-           local.A[5], local.A[6], local.A[7], local.W[i+0], K[i+0] );
-        P( local.A[7], local.A[0], local.A[1], local.A[2], local.A[3],
-           local.A[4], local.A[5], local.A[6], local.W[i+1], K[i+1] );
-        P( local.A[6], local.A[7], local.A[0], local.A[1], local.A[2],
-           local.A[3], local.A[4], local.A[5], local.W[i+2], K[i+2] );
-        P( local.A[5], local.A[6], local.A[7], local.A[0], local.A[1],
-           local.A[2], local.A[3], local.A[4], local.W[i+3], K[i+3] );
-        P( local.A[4], local.A[5], local.A[6], local.A[7], local.A[0],
-           local.A[1], local.A[2], local.A[3], local.W[i+4], K[i+4] );
-        P( local.A[3], local.A[4], local.A[5], local.A[6], local.A[7],
-           local.A[0], local.A[1], local.A[2], local.W[i+5], K[i+5] );
-        P( local.A[2], local.A[3], local.A[4], local.A[5], local.A[6],
-           local.A[7], local.A[0], local.A[1], local.W[i+6], K[i+6] );
-        P( local.A[1], local.A[2], local.A[3], local.A[4], local.A[5],
-           local.A[6], local.A[7], local.A[0], local.W[i+7], K[i+7] );
+    for (i = 0; i < 16; i += 8) {
+        P(local.A[0], local.A[1], local.A[2], local.A[3], local.A[4],
+          local.A[5], local.A[6], local.A[7], local.W[i + 0], K[i + 0]);
+        P(local.A[7], local.A[0], local.A[1], local.A[2], local.A[3],
+          local.A[4], local.A[5], local.A[6], local.W[i + 1], K[i + 1]);
+        P(local.A[6], local.A[7], local.A[0], local.A[1], local.A[2],
+          local.A[3], local.A[4], local.A[5], local.W[i + 2], K[i + 2]);
+        P(local.A[5], local.A[6], local.A[7], local.A[0], local.A[1],
+          local.A[2], local.A[3], local.A[4], local.W[i + 3], K[i + 3]);
+        P(local.A[4], local.A[5], local.A[6], local.A[7], local.A[0],
+          local.A[1], local.A[2], local.A[3], local.W[i + 4], K[i + 4]);
+        P(local.A[3], local.A[4], local.A[5], local.A[6], local.A[7],
+          local.A[0], local.A[1], local.A[2], local.W[i + 5], K[i + 5]);
+        P(local.A[2], local.A[3], local.A[4], local.A[5], local.A[6],
+          local.A[7], local.A[0], local.A[1], local.W[i + 6], K[i + 6]);
+        P(local.A[1], local.A[2], local.A[3], local.A[4], local.A[5],
+          local.A[6], local.A[7], local.A[0], local.W[i + 7], K[i + 7]);
     }
 
-    for( i = 16; i < 64; i += 8 )
-    {
-        P( local.A[0], local.A[1], local.A[2], local.A[3], local.A[4],
-           local.A[5], local.A[6], local.A[7], R(i+0), K[i+0] );
-        P( local.A[7], local.A[0], local.A[1], local.A[2], local.A[3],
-           local.A[4], local.A[5], local.A[6], R(i+1), K[i+1] );
-        P( local.A[6], local.A[7], local.A[0], local.A[1], local.A[2],
-           local.A[3], local.A[4], local.A[5], R(i+2), K[i+2] );
-        P( local.A[5], local.A[6], local.A[7], local.A[0], local.A[1],
-           local.A[2], local.A[3], local.A[4], R(i+3), K[i+3] );
-        P( local.A[4], local.A[5], local.A[6], local.A[7], local.A[0],
-           local.A[1], local.A[2], local.A[3], R(i+4), K[i+4] );
-        P( local.A[3], local.A[4], local.A[5], local.A[6], local.A[7],
-           local.A[0], local.A[1], local.A[2], R(i+5), K[i+5] );
-        P( local.A[2], local.A[3], local.A[4], local.A[5], local.A[6],
-           local.A[7], local.A[0], local.A[1], R(i+6), K[i+6] );
-        P( local.A[1], local.A[2], local.A[3], local.A[4], local.A[5],
-           local.A[6], local.A[7], local.A[0], R(i+7), K[i+7] );
+    for (i = 16; i < 64; i += 8) {
+        P(local.A[0], local.A[1], local.A[2], local.A[3], local.A[4],
+          local.A[5], local.A[6], local.A[7], R(i + 0), K[i + 0]);
+        P(local.A[7], local.A[0], local.A[1], local.A[2], local.A[3],
+          local.A[4], local.A[5], local.A[6], R(i + 1), K[i + 1]);
+        P(local.A[6], local.A[7], local.A[0], local.A[1], local.A[2],
+          local.A[3], local.A[4], local.A[5], R(i + 2), K[i + 2]);
+        P(local.A[5], local.A[6], local.A[7], local.A[0], local.A[1],
+          local.A[2], local.A[3], local.A[4], R(i + 3), K[i + 3]);
+        P(local.A[4], local.A[5], local.A[6], local.A[7], local.A[0],
+          local.A[1], local.A[2], local.A[3], R(i + 4), K[i + 4]);
+        P(local.A[3], local.A[4], local.A[5], local.A[6], local.A[7],
+          local.A[0], local.A[1], local.A[2], R(i + 5), K[i + 5]);
+        P(local.A[2], local.A[3], local.A[4], local.A[5], local.A[6],
+          local.A[7], local.A[0], local.A[1], R(i + 6), K[i + 6]);
+        P(local.A[1], local.A[2], local.A[3], local.A[4], local.A[5],
+          local.A[6], local.A[7], local.A[0], R(i + 7), K[i + 7]);
     }
-#endif /* MBEDTLS_SHA256_SMALLER */
+#            endif /* MBEDTLS_SHA256_SMALLER */
 
-    for( i = 0; i < 8; i++ )
+    for (i = 0; i < 8; i++)
         ctx->state[i] += local.A[i];
 
     /* Zeroise buffers and variables to clear sensitive data from memory. */
-    mbedtls_platform_zeroize( &local, sizeof( local ) );
+    mbedtls_platform_zeroize(&local, sizeof(local));
 
-    return 0 ;
+    return 0;
 }
 
-#endif /* !MBEDTLS_SHA256_PROCESS_ALT */
+#        endif /* !MBEDTLS_SHA256_PROCESS_ALT */
 
 /*
  * SHA-256 process buffer
  */
-int mbedtls_sha256_update( mbedtls_sha256_context *ctx,
-                               const unsigned char *input,
-                               size_t ilen )
+int mbedtls_sha256_update(mbedtls_sha256_context *ctx,
+                          const unsigned char *input,
+                          size_t ilen)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t fill;
     uint32_t left;
 
-    SHA256_VALIDATE_RET( ctx != NULL );
-    SHA256_VALIDATE_RET( ilen == 0 || input != NULL );
+    SHA256_VALIDATE_RET(ctx != NULL);
+    SHA256_VALIDATE_RET(ilen == 0 || input != NULL);
 
-    if( ilen == 0 )
-        return 0 ;
+    if (ilen == 0)
+        return 0;
 
     left = ctx->total[0] & 0x3F;
     fill = 64 - left;
 
-    ctx->total[0] += (uint32_t) ilen;
+    ctx->total[0] += (uint32_t)ilen;
     ctx->total[0] &= 0xFFFFFFFF;
 
-    if( ctx->total[0] < (uint32_t) ilen )
+    if (ctx->total[0] < (uint32_t)ilen)
         ctx->total[1]++;
 
-    if( left && ilen >= fill )
-    {
-        memcpy( (void *) (ctx->buffer + left), input, fill );
+    if (left && ilen >= fill) {
+        memcpy((void *)(ctx->buffer + left), input, fill);
 
-        if( ( ret = mbedtls_internal_sha256_process( ctx, ctx->buffer ) ) != 0 )
-            return ret ;
+        if ((ret = mbedtls_internal_sha256_process(ctx, ctx->buffer)) != 0)
+            return ret;
 
         input += fill;
-        ilen  -= fill;
+        ilen -= fill;
         left = 0;
     }
 
-    while( ilen >= 64 )
-    {
-        if( ( ret = mbedtls_internal_sha256_process( ctx, input ) ) != 0 )
-            return ret ;
+    while (ilen >= 64) {
+        if ((ret = mbedtls_internal_sha256_process(ctx, input)) != 0)
+            return ret;
 
         input += 64;
-        ilen  -= 64;
+        ilen -= 64;
     }
 
-    if( ilen > 0 )
-        memcpy( (void *) (ctx->buffer + left), input, ilen );
+    if (ilen > 0)
+        memcpy((void *)(ctx->buffer + left), input, ilen);
 
-    return 0 ;
+    return 0;
 }
 
 /*
  * SHA-256 final digest
  */
-int mbedtls_sha256_finish( mbedtls_sha256_context *ctx,
-                               unsigned char *output )
+int mbedtls_sha256_finish(mbedtls_sha256_context *ctx, unsigned char *output)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     uint32_t used;
     uint32_t high, low;
 
-    SHA256_VALIDATE_RET( ctx != NULL );
-    SHA256_VALIDATE_RET( (unsigned char *)output != NULL );
+    SHA256_VALIDATE_RET(ctx != NULL);
+    SHA256_VALIDATE_RET((unsigned char *)output != NULL);
 
     /*
      * Add padding: 0x80 then 0x00 until 8 bytes remain for the length
@@ -355,226 +341,203 @@
 
     ctx->buffer[used++] = 0x80;
 
-    if( used <= 56 )
-    {
+    if (used <= 56) {
         /* Enough room for padding + length in current block */
-        memset( ctx->buffer + used, 0, 56 - used );
-    }
-    else
-    {
+        memset(ctx->buffer + used, 0, 56 - used);
+    } else {
         /* We'll need an extra block */
-        memset( ctx->buffer + used, 0, 64 - used );
+        memset(ctx->buffer + used, 0, 64 - used);
 
-        if( ( ret = mbedtls_internal_sha256_process( ctx, ctx->buffer ) ) != 0 )
-            return ret ;
+        if ((ret = mbedtls_internal_sha256_process(ctx, ctx->buffer)) != 0)
+            return ret;
 
-        memset( ctx->buffer, 0, 56 );
+        memset(ctx->buffer, 0, 56);
     }
 
     /*
      * Add message length
      */
-    high = ( ctx->total[0] >> 29 )
-         | ( ctx->total[1] <<  3 );
-    low  = ( ctx->total[0] <<  3 );
+    high = (ctx->total[0] >> 29) | (ctx->total[1] << 3);
+    low = (ctx->total[0] << 3);
 
-    PUT_UINT32_BE( high, ctx->buffer, 56 );
-    PUT_UINT32_BE( low,  ctx->buffer, 60 );
+    PUT_UINT32_BE(high, ctx->buffer, 56);
+    PUT_UINT32_BE(low, ctx->buffer, 60);
 
-    if( ( ret = mbedtls_internal_sha256_process( ctx, ctx->buffer ) ) != 0 )
-        return ret ;
+    if ((ret = mbedtls_internal_sha256_process(ctx, ctx->buffer)) != 0)
+        return ret;
 
     /*
      * Output final state
      */
-    PUT_UINT32_BE( ctx->state[0], output,  0 );
-    PUT_UINT32_BE( ctx->state[1], output,  4 );
-    PUT_UINT32_BE( ctx->state[2], output,  8 );
-    PUT_UINT32_BE( ctx->state[3], output, 12 );
-    PUT_UINT32_BE( ctx->state[4], output, 16 );
-    PUT_UINT32_BE( ctx->state[5], output, 20 );
-    PUT_UINT32_BE( ctx->state[6], output, 24 );
+    PUT_UINT32_BE(ctx->state[0], output, 0);
+    PUT_UINT32_BE(ctx->state[1], output, 4);
+    PUT_UINT32_BE(ctx->state[2], output, 8);
+    PUT_UINT32_BE(ctx->state[3], output, 12);
+    PUT_UINT32_BE(ctx->state[4], output, 16);
+    PUT_UINT32_BE(ctx->state[5], output, 20);
+    PUT_UINT32_BE(ctx->state[6], output, 24);
 
-#if defined(MBEDTLS_SHA224_C)
-    if( ctx->is224 == 0 )
-#endif
-        PUT_UINT32_BE( ctx->state[7], output, 28 );
+#        if defined(MBEDTLS_SHA224_C)
+    if (ctx->is224 == 0)
+#        endif
+        PUT_UINT32_BE(ctx->state[7], output, 28);
 
-    return 0 ;
+    return 0;
 }
 
-#endif /* !MBEDTLS_SHA256_ALT */
+#    endif /* !MBEDTLS_SHA256_ALT */
 
 /*
  * output = SHA-256( input buffer )
  */
-int mbedtls_sha256( const unsigned char *input,
-                        size_t ilen,
-                        unsigned char *output,
-                        int is224 )
+int mbedtls_sha256(const unsigned char *input,
+                   size_t ilen,
+                   unsigned char *output,
+                   int is224)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     mbedtls_sha256_context ctx;
 
-#if defined(MBEDTLS_SHA224_C)
-    SHA256_VALIDATE_RET( is224 == 0 || is224 == 1 );
-#else
-    SHA256_VALIDATE_RET( is224 == 0 );
-#endif
+#    if defined(MBEDTLS_SHA224_C)
+    SHA256_VALIDATE_RET(is224 == 0 || is224 == 1);
+#    else
+    SHA256_VALIDATE_RET(is224 == 0);
+#    endif
 
-    SHA256_VALIDATE_RET( ilen == 0 || input != NULL );
-    SHA256_VALIDATE_RET( (unsigned char *)output != NULL );
+    SHA256_VALIDATE_RET(ilen == 0 || input != NULL);
+    SHA256_VALIDATE_RET((unsigned char *)output != NULL);
 
-    mbedtls_sha256_init( &ctx );
+    mbedtls_sha256_init(&ctx);
 
-    if( ( ret = mbedtls_sha256_starts( &ctx, is224 ) ) != 0 )
+    if ((ret = mbedtls_sha256_starts(&ctx, is224)) != 0)
         goto exit;
 
-    if( ( ret = mbedtls_sha256_update( &ctx, input, ilen ) ) != 0 )
+    if ((ret = mbedtls_sha256_update(&ctx, input, ilen)) != 0)
         goto exit;
 
-    if( ( ret = mbedtls_sha256_finish( &ctx, output ) ) != 0 )
+    if ((ret = mbedtls_sha256_finish(&ctx, output)) != 0)
         goto exit;
 
 exit:
-    mbedtls_sha256_free( &ctx );
+    mbedtls_sha256_free(&ctx);
 
-    return ret ;
+    return ret;
 }
 
-#if defined(MBEDTLS_SELF_TEST)
+#    if defined(MBEDTLS_SELF_TEST)
 /*
  * FIPS-180-2 test vectors
  */
-static const unsigned char sha256_test_buf[3][57] =
-{
+static const unsigned char sha256_test_buf[3][57] = {
     { "abc" },
     { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" },
     { "" }
 };
 
-static const size_t sha256_test_buflen[3] =
-{
-    3, 56, 1000
-};
+static const size_t sha256_test_buflen[3] = { 3, 56, 1000 };
 
-static const unsigned char sha256_test_sum[6][32] =
-{
+static const unsigned char sha256_test_sum[6][32] = {
     /*
      * SHA-224 test vectors
      */
-    { 0x23, 0x09, 0x7D, 0x22, 0x34, 0x05, 0xD8, 0x22,
-      0x86, 0x42, 0xA4, 0x77, 0xBD, 0xA2, 0x55, 0xB3,
-      0x2A, 0xAD, 0xBC, 0xE4, 0xBD, 0xA0, 0xB3, 0xF7,
-      0xE3, 0x6C, 0x9D, 0xA7 },
-    { 0x75, 0x38, 0x8B, 0x16, 0x51, 0x27, 0x76, 0xCC,
-      0x5D, 0xBA, 0x5D, 0xA1, 0xFD, 0x89, 0x01, 0x50,
-      0xB0, 0xC6, 0x45, 0x5C, 0xB4, 0xF5, 0x8B, 0x19,
-      0x52, 0x52, 0x25, 0x25 },
-    { 0x20, 0x79, 0x46, 0x55, 0x98, 0x0C, 0x91, 0xD8,
-      0xBB, 0xB4, 0xC1, 0xEA, 0x97, 0x61, 0x8A, 0x4B,
-      0xF0, 0x3F, 0x42, 0x58, 0x19, 0x48, 0xB2, 0xEE,
-      0x4E, 0xE7, 0xAD, 0x67 },
+    { 0x23, 0x09, 0x7D, 0x22, 0x34, 0x05, 0xD8, 0x22, 0x86, 0x42,
+      0xA4, 0x77, 0xBD, 0xA2, 0x55, 0xB3, 0x2A, 0xAD, 0xBC, 0xE4,
+      0xBD, 0xA0, 0xB3, 0xF7, 0xE3, 0x6C, 0x9D, 0xA7 },
+    { 0x75, 0x38, 0x8B, 0x16, 0x51, 0x27, 0x76, 0xCC, 0x5D, 0xBA,
+      0x5D, 0xA1, 0xFD, 0x89, 0x01, 0x50, 0xB0, 0xC6, 0x45, 0x5C,
+      0xB4, 0xF5, 0x8B, 0x19, 0x52, 0x52, 0x25, 0x25 },
+    { 0x20, 0x79, 0x46, 0x55, 0x98, 0x0C, 0x91, 0xD8, 0xBB, 0xB4,
+      0xC1, 0xEA, 0x97, 0x61, 0x8A, 0x4B, 0xF0, 0x3F, 0x42, 0x58,
+      0x19, 0x48, 0xB2, 0xEE, 0x4E, 0xE7, 0xAD, 0x67 },
 
     /*
      * SHA-256 test vectors
      */
-    { 0xBA, 0x78, 0x16, 0xBF, 0x8F, 0x01, 0xCF, 0xEA,
-      0x41, 0x41, 0x40, 0xDE, 0x5D, 0xAE, 0x22, 0x23,
-      0xB0, 0x03, 0x61, 0xA3, 0x96, 0x17, 0x7A, 0x9C,
-      0xB4, 0x10, 0xFF, 0x61, 0xF2, 0x00, 0x15, 0xAD },
-    { 0x24, 0x8D, 0x6A, 0x61, 0xD2, 0x06, 0x38, 0xB8,
-      0xE5, 0xC0, 0x26, 0x93, 0x0C, 0x3E, 0x60, 0x39,
-      0xA3, 0x3C, 0xE4, 0x59, 0x64, 0xFF, 0x21, 0x67,
-      0xF6, 0xEC, 0xED, 0xD4, 0x19, 0xDB, 0x06, 0xC1 },
-    { 0xCD, 0xC7, 0x6E, 0x5C, 0x99, 0x14, 0xFB, 0x92,
-      0x81, 0xA1, 0xC7, 0xE2, 0x84, 0xD7, 0x3E, 0x67,
-      0xF1, 0x80, 0x9A, 0x48, 0xA4, 0x97, 0x20, 0x0E,
-      0x04, 0x6D, 0x39, 0xCC, 0xC7, 0x11, 0x2C, 0xD0 }
+    { 0xBA, 0x78, 0x16, 0xBF, 0x8F, 0x01, 0xCF, 0xEA, 0x41, 0x41, 0x40,
+      0xDE, 0x5D, 0xAE, 0x22, 0x23, 0xB0, 0x03, 0x61, 0xA3, 0x96, 0x17,
+      0x7A, 0x9C, 0xB4, 0x10, 0xFF, 0x61, 0xF2, 0x00, 0x15, 0xAD },
+    { 0x24, 0x8D, 0x6A, 0x61, 0xD2, 0x06, 0x38, 0xB8, 0xE5, 0xC0, 0x26,
+      0x93, 0x0C, 0x3E, 0x60, 0x39, 0xA3, 0x3C, 0xE4, 0x59, 0x64, 0xFF,
+      0x21, 0x67, 0xF6, 0xEC, 0xED, 0xD4, 0x19, 0xDB, 0x06, 0xC1 },
+    { 0xCD, 0xC7, 0x6E, 0x5C, 0x99, 0x14, 0xFB, 0x92, 0x81, 0xA1, 0xC7,
+      0xE2, 0x84, 0xD7, 0x3E, 0x67, 0xF1, 0x80, 0x9A, 0x48, 0xA4, 0x97,
+      0x20, 0x0E, 0x04, 0x6D, 0x39, 0xCC, 0xC7, 0x11, 0x2C, 0xD0 }
 };
 
 /*
  * Checkup routine
  */
-int mbedtls_sha256_self_test( int verbose )
+int mbedtls_sha256_self_test(int verbose)
 {
     int i, j, k, buflen, ret = 0;
     unsigned char *buf;
     unsigned char sha256sum[32];
     mbedtls_sha256_context ctx;
 
-    buf = mbedtls_calloc( 1024, sizeof(unsigned char) );
-    if( NULL == buf )
-    {
-        if( verbose != 0 )
-            mbedtls_printf( "Buffer allocation failed\n" );
+    buf = mbedtls_calloc(1024, sizeof(unsigned char));
+    if (NULL == buf) {
+        if (verbose != 0)
+            mbedtls_printf("Buffer allocation failed\n");
 
-        return 1 ;
+        return 1;
     }
 
-    mbedtls_sha256_init( &ctx );
+    mbedtls_sha256_init(&ctx);
 
-    for( i = 0; i < 6; i++ )
-    {
+    for (i = 0; i < 6; i++) {
         j = i % 3;
         k = i < 3;
 
-        if( verbose != 0 )
-            mbedtls_printf( "  SHA-%d test #%d: ", 256 - k * 32, j + 1 );
+        if (verbose != 0)
+            mbedtls_printf("  SHA-%d test #%d: ", 256 - k * 32, j + 1);
 
-        if( ( ret = mbedtls_sha256_starts( &ctx, k ) ) != 0 )
+        if ((ret = mbedtls_sha256_starts(&ctx, k)) != 0)
             goto fail;
 
-        if( j == 2 )
-        {
-            memset( buf, 'a', buflen = 1000 );
+        if (j == 2) {
+            memset(buf, 'a', buflen = 1000);
 
-            for( j = 0; j < 1000; j++ )
-            {
-                ret = mbedtls_sha256_update( &ctx, buf, buflen );
-                if( ret != 0 )
+            for (j = 0; j < 1000; j++) {
+                ret = mbedtls_sha256_update(&ctx, buf, buflen);
+                if (ret != 0)
                     goto fail;
             }
 
-        }
-        else
-        {
-            ret = mbedtls_sha256_update( &ctx, sha256_test_buf[j],
-                                             sha256_test_buflen[j] );
-            if( ret != 0 )
-                 goto fail;
+        } else {
+            ret = mbedtls_sha256_update(&ctx, sha256_test_buf[j],
+                                        sha256_test_buflen[j]);
+            if (ret != 0)
+                goto fail;
         }
 
-        if( ( ret = mbedtls_sha256_finish( &ctx, sha256sum ) ) != 0 )
+        if ((ret = mbedtls_sha256_finish(&ctx, sha256sum)) != 0)
             goto fail;
 
-
-        if( memcmp( sha256sum, sha256_test_sum[i], 32 - k * 4 ) != 0 )
-        {
+        if (memcmp(sha256sum, sha256_test_sum[i], 32 - k * 4) != 0) {
             ret = 1;
             goto fail;
         }
 
-        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");
 
     goto exit;
 
 fail:
-    if( verbose != 0 )
-        mbedtls_printf( "failed\n" );
+    if (verbose != 0)
+        mbedtls_printf("failed\n");
 
 exit:
-    mbedtls_sha256_free( &ctx );
-    mbedtls_free( buf );
+    mbedtls_sha256_free(&ctx);
+    mbedtls_free(buf);
 
-    return ret ;
+    return ret;
 }
 
-#endif /* MBEDTLS_SELF_TEST */
+#    endif /* MBEDTLS_SELF_TEST */
 
 #endif /* MBEDTLS_SHA256_C */