library/sha512.c - security/mbedtls - Rivoreo Source Code Repositories

 /*
  *  FIPS-180-2 compliant SHA-384/512 implementation
  *
  *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
  *  SPDX-License-Identifier: Apache-2.0
  *
  *  Licensed under the Apache License, Version 2.0 (the "License"); you may
  *  not use this file except in compliance with the License.
  *  You may obtain a copy of the License at
  *
  *  http://www.apache.org/licenses/LICENSE-2.0
  *
  *  Unless required by applicable law or agreed to in writing, software
  *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  *
  *  This file is part of mbed TLS (https://tls.mbed.org)
  */
 /*
  *  The SHA-512 Secure Hash Standard was published by NIST in 2002.
  *
  *  http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
  */

 #if !defined(MBEDTLS_CONFIG_FILE)
 #include "mbedtls/config.h"
 #else
 #include MBEDTLS_CONFIG_FILE
 #endif

 #if defined(MBEDTLS_SHA512_C)

 #include "mbedtls/sha512.h"
 #include "mbedtls/utils.h"

 #if defined(_MSC_VER) || defined(__WATCOMC__)
   #define UL64(x) x##ui64
 #else
   #define UL64(x) x##ULL
 #endif

 #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_SHA512_ALT)

 /*
  * 64-bit integer manipulation macros (big endian)
  */
 #ifndef GET_UINT64_BE
 #define GET_UINT64_BE(n,b,i)                            \
 {                                                       \
     (n) = ( (uint64_t) (b)[(i)    ] << 56 )       \
         | ( (uint64_t) (b)[(i) + 1] << 48 )       \
         | ( (uint64_t) (b)[(i) + 2] << 40 )       \
         | ( (uint64_t) (b)[(i) + 3] << 32 )       \
         | ( (uint64_t) (b)[(i) + 4] << 24 )       \
         | ( (uint64_t) (b)[(i) + 5] << 16 )       \
         | ( (uint64_t) (b)[(i) + 6] <<  8 )       \
         | ( (uint64_t) (b)[(i) + 7]       );      \
 }
 #endif /* GET_UINT64_BE */

 #ifndef PUT_UINT64_BE
 #define PUT_UINT64_BE(n,b,i)                            \
 {                                                       \
     (b)[(i)    ] = (unsigned char) ( (n) >> 56 );       \
     (b)[(i) + 1] = (unsigned char) ( (n) >> 48 );       \
     (b)[(i) + 2] = (unsigned char) ( (n) >> 40 );       \
     (b)[(i) + 3] = (unsigned char) ( (n) >> 32 );       \
     (b)[(i) + 4] = (unsigned char) ( (n) >> 24 );       \
     (b)[(i) + 5] = (unsigned char) ( (n) >> 16 );       \
     (b)[(i) + 6] = (unsigned char) ( (n) >>  8 );       \
     (b)[(i) + 7] = (unsigned char) ( (n)       );       \
 }
 #endif /* PUT_UINT64_BE */

 void mbedtls_sha512_init( mbedtls_sha512_context *ctx )
 {
     memset( ctx, 0, sizeof( mbedtls_sha512_context ) );
 }

 void mbedtls_sha512_free( mbedtls_sha512_context *ctx )
 {
     if( ctx == NULL )
         return;

     mbedtls_zeroize( ctx, sizeof( mbedtls_sha512_context ) );
 }

 void mbedtls_sha512_clone( mbedtls_sha512_context *dst,
                            const mbedtls_sha512_context *src )
 {
     *dst = *src;
 }

 /*
  * SHA-512 context setup
  */
 int mbedtls_sha512_starts_ret( mbedtls_sha512_context *ctx, int is384 )
 {
     ctx->total[0] = 0;
     ctx->total[1] = 0;

     if( is384 == 0 )
     {
         /* SHA-512 */
         ctx->state[0] = UL64(0x6A09E667F3BCC908);
         ctx->state[1] = UL64(0xBB67AE8584CAA73B);
         ctx->state[2] = UL64(0x3C6EF372FE94F82B);
         ctx->state[3] = UL64(0xA54FF53A5F1D36F1);
         ctx->state[4] = UL64(0x510E527FADE682D1);
         ctx->state[5] = UL64(0x9B05688C2B3E6C1F);
         ctx->state[6] = UL64(0x1F83D9ABFB41BD6B);
         ctx->state[7] = UL64(0x5BE0CD19137E2179);
     }
     else
     {
         /* SHA-384 */
         ctx->state[0] = UL64(0xCBBB9D5DC1059ED8);
         ctx->state[1] = UL64(0x629A292A367CD507);
         ctx->state[2] = UL64(0x9159015A3070DD17);
         ctx->state[3] = UL64(0x152FECD8F70E5939);
         ctx->state[4] = UL64(0x67332667FFC00B31);
         ctx->state[5] = UL64(0x8EB44A8768581511);
         ctx->state[6] = UL64(0xDB0C2E0D64F98FA7);
         ctx->state[7] = UL64(0x47B5481DBEFA4FA4);
     }

     ctx->is384 = is384;

     return( 0 );
 }

 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 void mbedtls_sha512_starts( mbedtls_sha512_context *ctx,
                             int is384 )
 {
     mbedtls_sha512_starts_ret( ctx, is384 );
 }
 #endif

 #if !defined(MBEDTLS_SHA512_PROCESS_ALT)

 /*
  * Round constants
  */
 static const uint64_t K[80] =
 {
     UL64(0x428A2F98D728AE22),  UL64(0x7137449123EF65CD),
     UL64(0xB5C0FBCFEC4D3B2F),  UL64(0xE9B5DBA58189DBBC),
     UL64(0x3956C25BF348B538),  UL64(0x59F111F1B605D019),
     UL64(0x923F82A4AF194F9B),  UL64(0xAB1C5ED5DA6D8118),
     UL64(0xD807AA98A3030242),  UL64(0x12835B0145706FBE),
     UL64(0x243185BE4EE4B28C),  UL64(0x550C7DC3D5FFB4E2),
     UL64(0x72BE5D74F27B896F),  UL64(0x80DEB1FE3B1696B1),
     UL64(0x9BDC06A725C71235),  UL64(0xC19BF174CF692694),
     UL64(0xE49B69C19EF14AD2),  UL64(0xEFBE4786384F25E3),
     UL64(0x0FC19DC68B8CD5B5),  UL64(0x240CA1CC77AC9C65),
     UL64(0x2DE92C6F592B0275),  UL64(0x4A7484AA6EA6E483),
     UL64(0x5CB0A9DCBD41FBD4),  UL64(0x76F988DA831153B5),
     UL64(0x983E5152EE66DFAB),  UL64(0xA831C66D2DB43210),
     UL64(0xB00327C898FB213F),  UL64(0xBF597FC7BEEF0EE4),
     UL64(0xC6E00BF33DA88FC2),  UL64(0xD5A79147930AA725),
     UL64(0x06CA6351E003826F),  UL64(0x142929670A0E6E70),
     UL64(0x27B70A8546D22FFC),  UL64(0x2E1B21385C26C926),
     UL64(0x4D2C6DFC5AC42AED),  UL64(0x53380D139D95B3DF),
     UL64(0x650A73548BAF63DE),  UL64(0x766A0ABB3C77B2A8),
     UL64(0x81C2C92E47EDAEE6),  UL64(0x92722C851482353B),
     UL64(0xA2BFE8A14CF10364),  UL64(0xA81A664BBC423001),
     UL64(0xC24B8B70D0F89791),  UL64(0xC76C51A30654BE30),
     UL64(0xD192E819D6EF5218),  UL64(0xD69906245565A910),
     UL64(0xF40E35855771202A),  UL64(0x106AA07032BBD1B8),
     UL64(0x19A4C116B8D2D0C8),  UL64(0x1E376C085141AB53),
     UL64(0x2748774CDF8EEB99),  UL64(0x34B0BCB5E19B48A8),
     UL64(0x391C0CB3C5C95A63),  UL64(0x4ED8AA4AE3418ACB),
     UL64(0x5B9CCA4F7763E373),  UL64(0x682E6FF3D6B2B8A3),
     UL64(0x748F82EE5DEFB2FC),  UL64(0x78A5636F43172F60),
     UL64(0x84C87814A1F0AB72),  UL64(0x8CC702081A6439EC),
     UL64(0x90BEFFFA23631E28),  UL64(0xA4506CEBDE82BDE9),
     UL64(0xBEF9A3F7B2C67915),  UL64(0xC67178F2E372532B),
     UL64(0xCA273ECEEA26619C),  UL64(0xD186B8C721C0C207),
     UL64(0xEADA7DD6CDE0EB1E),  UL64(0xF57D4F7FEE6ED178),
     UL64(0x06F067AA72176FBA),  UL64(0x0A637DC5A2C898A6),
     UL64(0x113F9804BEF90DAE),  UL64(0x1B710B35131C471B),
     UL64(0x28DB77F523047D84),  UL64(0x32CAAB7B40C72493),
     UL64(0x3C9EBE0A15C9BEBC),  UL64(0x431D67C49C100D4C),
     UL64(0x4CC5D4BECB3E42B6),  UL64(0x597F299CFC657E2A),
     UL64(0x5FCB6FAB3AD6FAEC),  UL64(0x6C44198C4A475817)
 };

 int mbedtls_internal_sha512_process( mbedtls_sha512_context *ctx,
                                      const unsigned char data[128] )
 {
     int i;
     uint64_t temp1, temp2, W[80];
     uint64_t A, B, C, D, E, F, G, H;

 #define  SHR(x,n) (x >> n)
 #define ROTR(x,n) (SHR(x,n) | (x << (64 - n)))

 #define S0(x) (ROTR(x, 1) ^ ROTR(x, 8) ^  SHR(x, 7))
 #define S1(x) (ROTR(x,19) ^ ROTR(x,61) ^  SHR(x, 6))

 #define S2(x) (ROTR(x,28) ^ ROTR(x,34) ^ ROTR(x,39))
 #define S3(x) (ROTR(x,14) ^ ROTR(x,18) ^ ROTR(x,41))

 #define F0(x,y,z) ((x & y) | (z & (x | y)))
 #define F1(x,y,z) (z ^ (x & (y ^ z)))

 #define P(a,b,c,d,e,f,g,h,x,K)                  \
 {                                               \
     temp1 = h + S3(e) + F1(e,f,g) + K + x;      \
     temp2 = S2(a) + F0(a,b,c);                  \
     d += temp1; h = temp1 + temp2;              \
 }

     for( i = 0; i < 16; i++ )
     {
         GET_UINT64_BE( W[i], data, i << 3 );
     }

     for( ; i < 80; i++ )
     {
         W[i] = S1(W[i -  2]) + W[i -  7] +
                S0(W[i - 15]) + W[i - 16];
     }

     A = ctx->state[0];
     B = ctx->state[1];
     C = ctx->state[2];
     D = ctx->state[3];
     E = ctx->state[4];
     F = ctx->state[5];
     G = ctx->state[6];
     H = ctx->state[7];
     i = 0;

     do
     {
         P( A, B, C, D, E, F, G, H, W[i], K[i] ); i++;
         P( H, A, B, C, D, E, F, G, W[i], K[i] ); i++;
         P( G, H, A, B, C, D, E, F, W[i], K[i] ); i++;
         P( F, G, H, A, B, C, D, E, W[i], K[i] ); i++;
         P( E, F, G, H, A, B, C, D, W[i], K[i] ); i++;
         P( D, E, F, G, H, A, B, C, W[i], K[i] ); i++;
         P( C, D, E, F, G, H, A, B, W[i], K[i] ); i++;
         P( B, C, D, E, F, G, H, A, W[i], K[i] ); i++;
     }
     while( i < 80 );

     ctx->state[0] += A;
     ctx->state[1] += B;
     ctx->state[2] += C;
     ctx->state[3] += D;
     ctx->state[4] += E;
     ctx->state[5] += F;
     ctx->state[6] += G;
     ctx->state[7] += H;

     return( 0 );
 }

 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 void mbedtls_sha512_process( mbedtls_sha512_context *ctx,
                              const unsigned char data[128] )
 {
     mbedtls_internal_sha512_process( ctx, data );
 }
 #endif
 #endif /* !MBEDTLS_SHA512_PROCESS_ALT */

 /*
  * SHA-512 process buffer
  */
 int mbedtls_sha512_update_ret( mbedtls_sha512_context *ctx,
                                const unsigned char *input,
                                size_t ilen )
 {
     int ret;
     size_t fill;
     unsigned int left;

     if( ilen == 0 )
         return( 0 );

     left = (unsigned int) (ctx->total[0] & 0x7F);
     fill = 128 - left;

     ctx->total[0] += (uint64_t) ilen;

     if( ctx->total[0] < (uint64_t) ilen )
         ctx->total[1]++;

     if( left && ilen >= fill )
     {
         memcpy( (void *) (ctx->buffer + left), input, fill );

         if( ( ret = mbedtls_internal_sha512_process( ctx, ctx->buffer ) ) != 0 )
             return( ret );

         input += fill;
         ilen  -= fill;
         left = 0;
     }

     while( ilen >= 128 )
     {
         if( ( ret = mbedtls_internal_sha512_process( ctx, input ) ) != 0 )
             return( ret );

         input += 128;
         ilen  -= 128;
     }

     if( ilen > 0 )
         memcpy( (void *) (ctx->buffer + left), input, ilen );

     return( 0 );
 }

 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 void mbedtls_sha512_update( mbedtls_sha512_context *ctx,
                             const unsigned char *input,
                             size_t ilen )
 {
     mbedtls_sha512_update_ret( ctx, input, ilen );
 }
 #endif

 static const unsigned char sha512_padding[128] =
 {
  0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
 };

 /*
  * SHA-512 final digest
  */
 int mbedtls_sha512_finish_ret( mbedtls_sha512_context *ctx,
                                unsigned char output[64] )
 {
     int ret;
     size_t last, padn;
     uint64_t high, low;
     unsigned char msglen[16];

     high = ( ctx->total[0] >> 61 )
          | ( ctx->total[1] <<  3 );
     low  = ( ctx->total[0] <<  3 );

     PUT_UINT64_BE( high, msglen, 0 );
     PUT_UINT64_BE( low,  msglen, 8 );

     last = (size_t)( ctx->total[0] & 0x7F );
     padn = ( last < 112 ) ? ( 112 - last ) : ( 240 - last );

     if( ( ret = mbedtls_sha512_update_ret( ctx, sha512_padding, padn ) ) != 0 )
             return( ret );

     if( ( ret = mbedtls_sha512_update_ret( ctx, msglen, 16 ) ) != 0 )
             return( ret );

     PUT_UINT64_BE( ctx->state[0], output,  0 );
     PUT_UINT64_BE( ctx->state[1], output,  8 );
     PUT_UINT64_BE( ctx->state[2], output, 16 );
     PUT_UINT64_BE( ctx->state[3], output, 24 );
     PUT_UINT64_BE( ctx->state[4], output, 32 );
     PUT_UINT64_BE( ctx->state[5], output, 40 );

     if( ctx->is384 == 0 )
     {
         PUT_UINT64_BE( ctx->state[6], output, 48 );
         PUT_UINT64_BE( ctx->state[7], output, 56 );
     }

     return( 0 );
 }

 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 void mbedtls_sha512_finish( mbedtls_sha512_context *ctx,
                             unsigned char output[64] )
 {
     mbedtls_sha512_finish_ret( ctx, output );
 }
 #endif

 #endif /* !MBEDTLS_SHA512_ALT */

 /*
  * output = SHA-512( input buffer )
  */
 int mbedtls_sha512_ret( const unsigned char *input,
                     size_t ilen,
                     unsigned char output[64],
                     int is384 )
 {
     int ret;
     mbedtls_sha512_context ctx;

     mbedtls_sha512_init( &ctx );

     if( ( ret = mbedtls_sha512_starts_ret( &ctx, is384 ) ) != 0 )
         goto exit;

     if( ( ret = mbedtls_sha512_update_ret( &ctx, input, ilen ) ) != 0 )
         goto exit;

     if( ( ret = mbedtls_sha512_finish_ret( &ctx, output ) ) != 0 )
         goto exit;

 exit:
     mbedtls_sha512_free( &ctx );

     return( ret );
 }

 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 void mbedtls_sha512( const unsigned char *input,
                      size_t ilen,
                      unsigned char output[64],
                      int is384 )
 {
     mbedtls_sha512_ret( input, ilen, output, is384 );
 }
 #endif

 #if defined(MBEDTLS_SELF_TEST)

 /*
  * FIPS-180-2 test vectors
  */
 static const unsigned char sha512_test_buf[3][113] =
 {
     { "abc" },
     { "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"
       "hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu" },
     { "" }
 };

 static const size_t sha512_test_buflen[3] =
 {
     3, 112, 1000
 };

 static const unsigned char sha512_test_sum[6][64] =
 {
     /*
      * SHA-384 test vectors
      */
     { 0xCB, 0x00, 0x75, 0x3F, 0x45, 0xA3, 0x5E, 0x8B,
       0xB5, 0xA0, 0x3D, 0x69, 0x9A, 0xC6, 0x50, 0x07,
       0x27, 0x2C, 0x32, 0xAB, 0x0E, 0xDE, 0xD1, 0x63,
       0x1A, 0x8B, 0x60, 0x5A, 0x43, 0xFF, 0x5B, 0xED,
       0x80, 0x86, 0x07, 0x2B, 0xA1, 0xE7, 0xCC, 0x23,
       0x58, 0xBA, 0xEC, 0xA1, 0x34, 0xC8, 0x25, 0xA7 },
     { 0x09, 0x33, 0x0C, 0x33, 0xF7, 0x11, 0x47, 0xE8,
       0x3D, 0x19, 0x2F, 0xC7, 0x82, 0xCD, 0x1B, 0x47,
       0x53, 0x11, 0x1B, 0x17, 0x3B, 0x3B, 0x05, 0xD2,
       0x2F, 0xA0, 0x80, 0x86, 0xE3, 0xB0, 0xF7, 0x12,
       0xFC, 0xC7, 0xC7, 0x1A, 0x55, 0x7E, 0x2D, 0xB9,
       0x66, 0xC3, 0xE9, 0xFA, 0x91, 0x74, 0x60, 0x39 },
     { 0x9D, 0x0E, 0x18, 0x09, 0x71, 0x64, 0x74, 0xCB,
       0x08, 0x6E, 0x83, 0x4E, 0x31, 0x0A, 0x4A, 0x1C,
       0xED, 0x14, 0x9E, 0x9C, 0x00, 0xF2, 0x48, 0x52,
       0x79, 0x72, 0xCE, 0xC5, 0x70, 0x4C, 0x2A, 0x5B,
       0x07, 0xB8, 0xB3, 0xDC, 0x38, 0xEC, 0xC4, 0xEB,
       0xAE, 0x97, 0xDD, 0xD8, 0x7F, 0x3D, 0x89, 0x85 },

     /*
      * SHA-512 test vectors
      */
     { 0xDD, 0xAF, 0x35, 0xA1, 0x93, 0x61, 0x7A, 0xBA,
       0xCC, 0x41, 0x73, 0x49, 0xAE, 0x20, 0x41, 0x31,
       0x12, 0xE6, 0xFA, 0x4E, 0x89, 0xA9, 0x7E, 0xA2,
       0x0A, 0x9E, 0xEE, 0xE6, 0x4B, 0x55, 0xD3, 0x9A,
       0x21, 0x92, 0x99, 0x2A, 0x27, 0x4F, 0xC1, 0xA8,
       0x36, 0xBA, 0x3C, 0x23, 0xA3, 0xFE, 0xEB, 0xBD,
       0x45, 0x4D, 0x44, 0x23, 0x64, 0x3C, 0xE8, 0x0E,
       0x2A, 0x9A, 0xC9, 0x4F, 0xA5, 0x4C, 0xA4, 0x9F },
     { 0x8E, 0x95, 0x9B, 0x75, 0xDA, 0xE3, 0x13, 0xDA,
       0x8C, 0xF4, 0xF7, 0x28, 0x14, 0xFC, 0x14, 0x3F,
       0x8F, 0x77, 0x79, 0xC6, 0xEB, 0x9F, 0x7F, 0xA1,
       0x72, 0x99, 0xAE, 0xAD, 0xB6, 0x88, 0x90, 0x18,
       0x50, 0x1D, 0x28, 0x9E, 0x49, 0x00, 0xF7, 0xE4,
       0x33, 0x1B, 0x99, 0xDE, 0xC4, 0xB5, 0x43, 0x3A,
       0xC7, 0xD3, 0x29, 0xEE, 0xB6, 0xDD, 0x26, 0x54,
       0x5E, 0x96, 0xE5, 0x5B, 0x87, 0x4B, 0xE9, 0x09 },
     { 0xE7, 0x18, 0x48, 0x3D, 0x0C, 0xE7, 0x69, 0x64,
       0x4E, 0x2E, 0x42, 0xC7, 0xBC, 0x15, 0xB4, 0x63,
       0x8E, 0x1F, 0x98, 0xB1, 0x3B, 0x20, 0x44, 0x28,
       0x56, 0x32, 0xA8, 0x03, 0xAF, 0xA9, 0x73, 0xEB,
       0xDE, 0x0F, 0xF2, 0x44, 0x87, 0x7E, 0xA6, 0x0A,
       0x4C, 0xB0, 0x43, 0x2C, 0xE5, 0x77, 0xC3, 0x1B,
       0xEB, 0x00, 0x9C, 0x5C, 0x2C, 0x49, 0xAA, 0x2E,
       0x4E, 0xAD, 0xB2, 0x17, 0xAD, 0x8C, 0xC0, 0x9B }
 };

 /*
  * Checkup routine
  */
 int mbedtls_sha512_self_test( int verbose )
 {
     int i, j, k, buflen, ret = 0;
     unsigned char *buf;
     unsigned char sha512sum[64];
     mbedtls_sha512_context ctx;

     buf = mbedtls_calloc( 1024, sizeof(unsigned char) );
     if( NULL == buf )
     {
         if( verbose != 0 )
             mbedtls_printf( "Buffer allocation failed\n" );

         return( 1 );
     }

     mbedtls_sha512_init( &ctx );

     for( i = 0; i < 6; i++ )
     {
         j = i % 3;
         k = i < 3;

         if( verbose != 0 )
             mbedtls_printf( "  SHA-%d test #%d: ", 512 - k * 128, j + 1 );

         if( ( ret = mbedtls_sha512_starts_ret( &ctx, k ) ) != 0 )
             goto fail;

         if( j == 2 )
         {
             memset( buf, 'a', buflen = 1000 );

             for( j = 0; j < 1000; j++ )
             {
                 ret = mbedtls_sha512_update_ret( &ctx, buf, buflen );
                 if( ret != 0 )
                     goto fail;
             }
         }
         else
         {
             ret = mbedtls_sha512_update_ret( &ctx, sha512_test_buf[j],
                                              sha512_test_buflen[j] );
             if( ret != 0 )
                 goto fail;
         }

         if( ( ret = mbedtls_sha512_finish_ret( &ctx, sha512sum ) ) != 0 )
             goto fail;

         if( memcmp( sha512sum, sha512_test_sum[i], 64 - k * 16 ) != 0 )
         {
             ret = 1;
             goto fail;
         }

         if( verbose != 0 )
             mbedtls_printf( "passed\n" );
     }

     if( verbose != 0 )
         mbedtls_printf( "\n" );

     goto exit;

 fail:
     if( verbose != 0 )
         mbedtls_printf( "failed\n" );

 exit:
     mbedtls_sha512_free( &ctx );
     mbedtls_free( buf );

     return( ret );
 }

 #endif /* MBEDTLS_SELF_TEST */

 #endif /* MBEDTLS_SHA512_C */
	/*
	* FIPS-180-2 compliant SHA-384/512 implementation
	*
	* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
	* SPDX-License-Identifier: Apache-2.0
	*
	* Licensed under the Apache License, Version 2.0 (the "License"); you may
	* not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
	* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*
	* This file is part of mbed TLS (https://tls.mbed.org)
	*/
	/*
	* The SHA-512 Secure Hash Standard was published by NIST in 2002.
	*
	* http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
	*/

	#if !defined(MBEDTLS_CONFIG_FILE)
	#include "mbedtls/config.h"
	#else
	#include MBEDTLS_CONFIG_FILE
	#endif

	#if defined(MBEDTLS_SHA512_C)

	#include "mbedtls/sha512.h"
	#include "mbedtls/utils.h"

	#if defined(_MSC_VER) \|\| defined(__WATCOMC__)
	#define UL64(x) x##ui64
	#else
	#define UL64(x) x##ULL
	#endif

	#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_SHA512_ALT)

	/*
	* 64-bit integer manipulation macros (big endian)
	*/
	#ifndef GET_UINT64_BE
	#define GET_UINT64_BE(n,b,i) \
	{ \
	(n) = ( (uint64_t) (b)[(i) ] << 56 ) \
	\| ( (uint64_t) (b)[(i) + 1] << 48 ) \
	\| ( (uint64_t) (b)[(i) + 2] << 40 ) \
	\| ( (uint64_t) (b)[(i) + 3] << 32 ) \
	\| ( (uint64_t) (b)[(i) + 4] << 24 ) \
	\| ( (uint64_t) (b)[(i) + 5] << 16 ) \
	\| ( (uint64_t) (b)[(i) + 6] << 8 ) \
	\| ( (uint64_t) (b)[(i) + 7] ); \
	}
	#endif /* GET_UINT64_BE */

	#ifndef PUT_UINT64_BE
	#define PUT_UINT64_BE(n,b,i) \
	{ \
	(b)[(i) ] = (unsigned char) ( (n) >> 56 ); \
	(b)[(i) + 1] = (unsigned char) ( (n) >> 48 ); \
	(b)[(i) + 2] = (unsigned char) ( (n) >> 40 ); \
	(b)[(i) + 3] = (unsigned char) ( (n) >> 32 ); \
	(b)[(i) + 4] = (unsigned char) ( (n) >> 24 ); \
	(b)[(i) + 5] = (unsigned char) ( (n) >> 16 ); \
	(b)[(i) + 6] = (unsigned char) ( (n) >> 8 ); \
	(b)[(i) + 7] = (unsigned char) ( (n) ); \
	}
	#endif /* PUT_UINT64_BE */

	void mbedtls_sha512_init( mbedtls_sha512_context *ctx )
	{
	memset( ctx, 0, sizeof( mbedtls_sha512_context ) );
	}

	void mbedtls_sha512_free( mbedtls_sha512_context *ctx )
	{
	if( ctx == NULL )
	return;

	mbedtls_zeroize( ctx, sizeof( mbedtls_sha512_context ) );
	}

	void mbedtls_sha512_clone( mbedtls_sha512_context *dst,
	const mbedtls_sha512_context *src )
	{
	dst = src;
	}

	/*
	* SHA-512 context setup
	*/
	int mbedtls_sha512_starts_ret( mbedtls_sha512_context *ctx, int is384 )
	{
	ctx->total[0] = 0;
	ctx->total[1] = 0;

	if( is384 == 0 )
	{
	/* SHA-512 */
	ctx->state[0] = UL64(0x6A09E667F3BCC908);
	ctx->state[1] = UL64(0xBB67AE8584CAA73B);
	ctx->state[2] = UL64(0x3C6EF372FE94F82B);
	ctx->state[3] = UL64(0xA54FF53A5F1D36F1);
	ctx->state[4] = UL64(0x510E527FADE682D1);
	ctx->state[5] = UL64(0x9B05688C2B3E6C1F);
	ctx->state[6] = UL64(0x1F83D9ABFB41BD6B);
	ctx->state[7] = UL64(0x5BE0CD19137E2179);
	}
	else
	{
	/* SHA-384 */
	ctx->state[0] = UL64(0xCBBB9D5DC1059ED8);
	ctx->state[1] = UL64(0x629A292A367CD507);
	ctx->state[2] = UL64(0x9159015A3070DD17);
	ctx->state[3] = UL64(0x152FECD8F70E5939);
	ctx->state[4] = UL64(0x67332667FFC00B31);
	ctx->state[5] = UL64(0x8EB44A8768581511);
	ctx->state[6] = UL64(0xDB0C2E0D64F98FA7);
	ctx->state[7] = UL64(0x47B5481DBEFA4FA4);
	}

	ctx->is384 = is384;

	return( 0 );
	}

	#if !defined(MBEDTLS_DEPRECATED_REMOVED)
	void mbedtls_sha512_starts( mbedtls_sha512_context *ctx,
	int is384 )
	{
	mbedtls_sha512_starts_ret( ctx, is384 );
	}
	#endif

	#if !defined(MBEDTLS_SHA512_PROCESS_ALT)

	/*
	* Round constants
	*/
	static const uint64_t K[80] =
	{
	UL64(0x428A2F98D728AE22), UL64(0x7137449123EF65CD),
	UL64(0xB5C0FBCFEC4D3B2F), UL64(0xE9B5DBA58189DBBC),
	UL64(0x3956C25BF348B538), UL64(0x59F111F1B605D019),
	UL64(0x923F82A4AF194F9B), UL64(0xAB1C5ED5DA6D8118),
	UL64(0xD807AA98A3030242), UL64(0x12835B0145706FBE),
	UL64(0x243185BE4EE4B28C), UL64(0x550C7DC3D5FFB4E2),
	UL64(0x72BE5D74F27B896F), UL64(0x80DEB1FE3B1696B1),
	UL64(0x9BDC06A725C71235), UL64(0xC19BF174CF692694),
	UL64(0xE49B69C19EF14AD2), UL64(0xEFBE4786384F25E3),
	UL64(0x0FC19DC68B8CD5B5), UL64(0x240CA1CC77AC9C65),
	UL64(0x2DE92C6F592B0275), UL64(0x4A7484AA6EA6E483),
	UL64(0x5CB0A9DCBD41FBD4), UL64(0x76F988DA831153B5),
	UL64(0x983E5152EE66DFAB), UL64(0xA831C66D2DB43210),
	UL64(0xB00327C898FB213F), UL64(0xBF597FC7BEEF0EE4),
	UL64(0xC6E00BF33DA88FC2), UL64(0xD5A79147930AA725),
	UL64(0x06CA6351E003826F), UL64(0x142929670A0E6E70),
	UL64(0x27B70A8546D22FFC), UL64(0x2E1B21385C26C926),
	UL64(0x4D2C6DFC5AC42AED), UL64(0x53380D139D95B3DF),
	UL64(0x650A73548BAF63DE), UL64(0x766A0ABB3C77B2A8),
	UL64(0x81C2C92E47EDAEE6), UL64(0x92722C851482353B),
	UL64(0xA2BFE8A14CF10364), UL64(0xA81A664BBC423001),
	UL64(0xC24B8B70D0F89791), UL64(0xC76C51A30654BE30),
	UL64(0xD192E819D6EF5218), UL64(0xD69906245565A910),
	UL64(0xF40E35855771202A), UL64(0x106AA07032BBD1B8),
	UL64(0x19A4C116B8D2D0C8), UL64(0x1E376C085141AB53),
	UL64(0x2748774CDF8EEB99), UL64(0x34B0BCB5E19B48A8),
	UL64(0x391C0CB3C5C95A63), UL64(0x4ED8AA4AE3418ACB),
	UL64(0x5B9CCA4F7763E373), UL64(0x682E6FF3D6B2B8A3),
	UL64(0x748F82EE5DEFB2FC), UL64(0x78A5636F43172F60),
	UL64(0x84C87814A1F0AB72), UL64(0x8CC702081A6439EC),
	UL64(0x90BEFFFA23631E28), UL64(0xA4506CEBDE82BDE9),
	UL64(0xBEF9A3F7B2C67915), UL64(0xC67178F2E372532B),
	UL64(0xCA273ECEEA26619C), UL64(0xD186B8C721C0C207),
	UL64(0xEADA7DD6CDE0EB1E), UL64(0xF57D4F7FEE6ED178),
	UL64(0x06F067AA72176FBA), UL64(0x0A637DC5A2C898A6),
	UL64(0x113F9804BEF90DAE), UL64(0x1B710B35131C471B),
	UL64(0x28DB77F523047D84), UL64(0x32CAAB7B40C72493),
	UL64(0x3C9EBE0A15C9BEBC), UL64(0x431D67C49C100D4C),
	UL64(0x4CC5D4BECB3E42B6), UL64(0x597F299CFC657E2A),
	UL64(0x5FCB6FAB3AD6FAEC), UL64(0x6C44198C4A475817)
	};

	int mbedtls_internal_sha512_process( mbedtls_sha512_context *ctx,
	const unsigned char data[128] )
	{
	int i;
	uint64_t temp1, temp2, W[80];
	uint64_t A, B, C, D, E, F, G, H;

	#define SHR(x,n) (x >> n)
	#define ROTR(x,n) (SHR(x,n) \| (x << (64 - n)))

	#define S0(x) (ROTR(x, 1) ^ ROTR(x, 8) ^ SHR(x, 7))
	#define S1(x) (ROTR(x,19) ^ ROTR(x,61) ^ SHR(x, 6))

	#define S2(x) (ROTR(x,28) ^ ROTR(x,34) ^ ROTR(x,39))
	#define S3(x) (ROTR(x,14) ^ ROTR(x,18) ^ ROTR(x,41))

	#define F0(x,y,z) ((x & y) \| (z & (x \| y)))
	#define F1(x,y,z) (z ^ (x & (y ^ z)))

	#define P(a,b,c,d,e,f,g,h,x,K) \
	{ \
	temp1 = h + S3(e) + F1(e,f,g) + K + x; \
	temp2 = S2(a) + F0(a,b,c); \
	d += temp1; h = temp1 + temp2; \
	}

	for( i = 0; i < 16; i++ )
	{
	GET_UINT64_BE( W[i], data, i << 3 );
	}

	for( ; i < 80; i++ )
	{
	W[i] = S1(W[i - 2]) + W[i - 7] +
	S0(W[i - 15]) + W[i - 16];
	}

	A = ctx->state[0];
	B = ctx->state[1];
	C = ctx->state[2];
	D = ctx->state[3];
	E = ctx->state[4];
	F = ctx->state[5];
	G = ctx->state[6];
	H = ctx->state[7];
	i = 0;

	do
	{
	P( A, B, C, D, E, F, G, H, W[i], K[i] ); i++;
	P( H, A, B, C, D, E, F, G, W[i], K[i] ); i++;
	P( G, H, A, B, C, D, E, F, W[i], K[i] ); i++;
	P( F, G, H, A, B, C, D, E, W[i], K[i] ); i++;
	P( E, F, G, H, A, B, C, D, W[i], K[i] ); i++;
	P( D, E, F, G, H, A, B, C, W[i], K[i] ); i++;
	P( C, D, E, F, G, H, A, B, W[i], K[i] ); i++;
	P( B, C, D, E, F, G, H, A, W[i], K[i] ); i++;
	}
	while( i < 80 );

	ctx->state[0] += A;
	ctx->state[1] += B;
	ctx->state[2] += C;
	ctx->state[3] += D;
	ctx->state[4] += E;
	ctx->state[5] += F;
	ctx->state[6] += G;
	ctx->state[7] += H;

	return( 0 );
	}

	#if !defined(MBEDTLS_DEPRECATED_REMOVED)
	void mbedtls_sha512_process( mbedtls_sha512_context *ctx,
	const unsigned char data[128] )
	{
	mbedtls_internal_sha512_process( ctx, data );
	}
	#endif
	#endif /* !MBEDTLS_SHA512_PROCESS_ALT */

	/*
	* SHA-512 process buffer
	*/
	int mbedtls_sha512_update_ret( mbedtls_sha512_context *ctx,
	const unsigned char *input,
	size_t ilen )
	{
	int ret;
	size_t fill;
	unsigned int left;

	if( ilen == 0 )
	return( 0 );

	left = (unsigned int) (ctx->total[0] & 0x7F);
	fill = 128 - left;

	ctx->total[0] += (uint64_t) ilen;

	if( ctx->total[0] < (uint64_t) ilen )
	ctx->total[1]++;

	if( left && ilen >= fill )
	{
	memcpy( (void *) (ctx->buffer + left), input, fill );

	if( ( ret = mbedtls_internal_sha512_process( ctx, ctx->buffer ) ) != 0 )
	return( ret );

	input += fill;
	ilen -= fill;
	left = 0;
	}

	while( ilen >= 128 )
	{
	if( ( ret = mbedtls_internal_sha512_process( ctx, input ) ) != 0 )
	return( ret );

	input += 128;
	ilen -= 128;
	}

	if( ilen > 0 )
	memcpy( (void *) (ctx->buffer + left), input, ilen );

	return( 0 );
	}

	#if !defined(MBEDTLS_DEPRECATED_REMOVED)
	void mbedtls_sha512_update( mbedtls_sha512_context *ctx,
	const unsigned char *input,
	size_t ilen )
	{
	mbedtls_sha512_update_ret( ctx, input, ilen );
	}
	#endif

	static const unsigned char sha512_padding[128] =
	{
	0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
	};

	/*
	* SHA-512 final digest
	*/
	int mbedtls_sha512_finish_ret( mbedtls_sha512_context *ctx,
	unsigned char output[64] )
	{
	int ret;
	size_t last, padn;
	uint64_t high, low;
	unsigned char msglen[16];

	high = ( ctx->total[0] >> 61 )
	\| ( ctx->total[1] << 3 );
	low = ( ctx->total[0] << 3 );

	PUT_UINT64_BE( high, msglen, 0 );
	PUT_UINT64_BE( low, msglen, 8 );

	last = (size_t)( ctx->total[0] & 0x7F );
	padn = ( last < 112 ) ? ( 112 - last ) : ( 240 - last );

	if( ( ret = mbedtls_sha512_update_ret( ctx, sha512_padding, padn ) ) != 0 )
	return( ret );

	if( ( ret = mbedtls_sha512_update_ret( ctx, msglen, 16 ) ) != 0 )
	return( ret );

	PUT_UINT64_BE( ctx->state[0], output, 0 );
	PUT_UINT64_BE( ctx->state[1], output, 8 );
	PUT_UINT64_BE( ctx->state[2], output, 16 );
	PUT_UINT64_BE( ctx->state[3], output, 24 );
	PUT_UINT64_BE( ctx->state[4], output, 32 );
	PUT_UINT64_BE( ctx->state[5], output, 40 );

	if( ctx->is384 == 0 )
	{
	PUT_UINT64_BE( ctx->state[6], output, 48 );
	PUT_UINT64_BE( ctx->state[7], output, 56 );
	}

	return( 0 );
	}

	#if !defined(MBEDTLS_DEPRECATED_REMOVED)
	void mbedtls_sha512_finish( mbedtls_sha512_context *ctx,
	unsigned char output[64] )
	{
	mbedtls_sha512_finish_ret( ctx, output );
	}
	#endif

	#endif /* !MBEDTLS_SHA512_ALT */

	/*
	* output = SHA-512( input buffer )
	*/
	int mbedtls_sha512_ret( const unsigned char *input,
	size_t ilen,
	unsigned char output[64],
	int is384 )
	{
	int ret;
	mbedtls_sha512_context ctx;

	mbedtls_sha512_init( &ctx );

	if( ( ret = mbedtls_sha512_starts_ret( &ctx, is384 ) ) != 0 )
	goto exit;

	if( ( ret = mbedtls_sha512_update_ret( &ctx, input, ilen ) ) != 0 )
	goto exit;

	if( ( ret = mbedtls_sha512_finish_ret( &ctx, output ) ) != 0 )
	goto exit;

	exit:
	mbedtls_sha512_free( &ctx );

	return( ret );
	}

	#if !defined(MBEDTLS_DEPRECATED_REMOVED)
	void mbedtls_sha512( const unsigned char *input,
	size_t ilen,
	unsigned char output[64],
	int is384 )
	{
	mbedtls_sha512_ret( input, ilen, output, is384 );
	}
	#endif

	#if defined(MBEDTLS_SELF_TEST)

	/*
	* FIPS-180-2 test vectors
	*/
	static const unsigned char sha512_test_buf[3][113] =
	{
	{ "abc" },
	{ "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"
	"hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu" },
	{ "" }
	};

	static const size_t sha512_test_buflen[3] =
	{
	3, 112, 1000
	};

	static const unsigned char sha512_test_sum[6][64] =
	{
	/*
	* SHA-384 test vectors
	*/
	{ 0xCB, 0x00, 0x75, 0x3F, 0x45, 0xA3, 0x5E, 0x8B,
	0xB5, 0xA0, 0x3D, 0x69, 0x9A, 0xC6, 0x50, 0x07,
	0x27, 0x2C, 0x32, 0xAB, 0x0E, 0xDE, 0xD1, 0x63,
	0x1A, 0x8B, 0x60, 0x5A, 0x43, 0xFF, 0x5B, 0xED,
	0x80, 0x86, 0x07, 0x2B, 0xA1, 0xE7, 0xCC, 0x23,
	0x58, 0xBA, 0xEC, 0xA1, 0x34, 0xC8, 0x25, 0xA7 },
	{ 0x09, 0x33, 0x0C, 0x33, 0xF7, 0x11, 0x47, 0xE8,
	0x3D, 0x19, 0x2F, 0xC7, 0x82, 0xCD, 0x1B, 0x47,
	0x53, 0x11, 0x1B, 0x17, 0x3B, 0x3B, 0x05, 0xD2,
	0x2F, 0xA0, 0x80, 0x86, 0xE3, 0xB0, 0xF7, 0x12,
	0xFC, 0xC7, 0xC7, 0x1A, 0x55, 0x7E, 0x2D, 0xB9,
	0x66, 0xC3, 0xE9, 0xFA, 0x91, 0x74, 0x60, 0x39 },
	{ 0x9D, 0x0E, 0x18, 0x09, 0x71, 0x64, 0x74, 0xCB,
	0x08, 0x6E, 0x83, 0x4E, 0x31, 0x0A, 0x4A, 0x1C,
	0xED, 0x14, 0x9E, 0x9C, 0x00, 0xF2, 0x48, 0x52,
	0x79, 0x72, 0xCE, 0xC5, 0x70, 0x4C, 0x2A, 0x5B,
	0x07, 0xB8, 0xB3, 0xDC, 0x38, 0xEC, 0xC4, 0xEB,
	0xAE, 0x97, 0xDD, 0xD8, 0x7F, 0x3D, 0x89, 0x85 },

	/*
	* SHA-512 test vectors
	*/
	{ 0xDD, 0xAF, 0x35, 0xA1, 0x93, 0x61, 0x7A, 0xBA,
	0xCC, 0x41, 0x73, 0x49, 0xAE, 0x20, 0x41, 0x31,
	0x12, 0xE6, 0xFA, 0x4E, 0x89, 0xA9, 0x7E, 0xA2,
	0x0A, 0x9E, 0xEE, 0xE6, 0x4B, 0x55, 0xD3, 0x9A,
	0x21, 0x92, 0x99, 0x2A, 0x27, 0x4F, 0xC1, 0xA8,
	0x36, 0xBA, 0x3C, 0x23, 0xA3, 0xFE, 0xEB, 0xBD,
	0x45, 0x4D, 0x44, 0x23, 0x64, 0x3C, 0xE8, 0x0E,
	0x2A, 0x9A, 0xC9, 0x4F, 0xA5, 0x4C, 0xA4, 0x9F },
	{ 0x8E, 0x95, 0x9B, 0x75, 0xDA, 0xE3, 0x13, 0xDA,
	0x8C, 0xF4, 0xF7, 0x28, 0x14, 0xFC, 0x14, 0x3F,
	0x8F, 0x77, 0x79, 0xC6, 0xEB, 0x9F, 0x7F, 0xA1,
	0x72, 0x99, 0xAE, 0xAD, 0xB6, 0x88, 0x90, 0x18,
	0x50, 0x1D, 0x28, 0x9E, 0x49, 0x00, 0xF7, 0xE4,
	0x33, 0x1B, 0x99, 0xDE, 0xC4, 0xB5, 0x43, 0x3A,
	0xC7, 0xD3, 0x29, 0xEE, 0xB6, 0xDD, 0x26, 0x54,
	0x5E, 0x96, 0xE5, 0x5B, 0x87, 0x4B, 0xE9, 0x09 },
	{ 0xE7, 0x18, 0x48, 0x3D, 0x0C, 0xE7, 0x69, 0x64,
	0x4E, 0x2E, 0x42, 0xC7, 0xBC, 0x15, 0xB4, 0x63,
	0x8E, 0x1F, 0x98, 0xB1, 0x3B, 0x20, 0x44, 0x28,
	0x56, 0x32, 0xA8, 0x03, 0xAF, 0xA9, 0x73, 0xEB,
	0xDE, 0x0F, 0xF2, 0x44, 0x87, 0x7E, 0xA6, 0x0A,
	0x4C, 0xB0, 0x43, 0x2C, 0xE5, 0x77, 0xC3, 0x1B,
	0xEB, 0x00, 0x9C, 0x5C, 0x2C, 0x49, 0xAA, 0x2E,
	0x4E, 0xAD, 0xB2, 0x17, 0xAD, 0x8C, 0xC0, 0x9B }
	};

	/*
	* Checkup routine
	*/
	int mbedtls_sha512_self_test( int verbose )
	{
	int i, j, k, buflen, ret = 0;
	unsigned char *buf;
	unsigned char sha512sum[64];
	mbedtls_sha512_context ctx;

	buf = mbedtls_calloc( 1024, sizeof(unsigned char) );
	if( NULL == buf )
	{
	if( verbose != 0 )
	mbedtls_printf( "Buffer allocation failed\n" );

	return( 1 );
	}

	mbedtls_sha512_init( &ctx );

	for( i = 0; i < 6; i++ )
	{
	j = i % 3;
	k = i < 3;

	if( verbose != 0 )
	mbedtls_printf( " SHA-%d test #%d: ", 512 - k * 128, j + 1 );

	if( ( ret = mbedtls_sha512_starts_ret( &ctx, k ) ) != 0 )
	goto fail;

	if( j == 2 )
	{
	memset( buf, 'a', buflen = 1000 );

	for( j = 0; j < 1000; j++ )
	{
	ret = mbedtls_sha512_update_ret( &ctx, buf, buflen );
	if( ret != 0 )
	goto fail;
	}
	}
	else
	{
	ret = mbedtls_sha512_update_ret( &ctx, sha512_test_buf[j],
	sha512_test_buflen[j] );
	if( ret != 0 )
	goto fail;
	}

	if( ( ret = mbedtls_sha512_finish_ret( &ctx, sha512sum ) ) != 0 )
	goto fail;

	if( memcmp( sha512sum, sha512_test_sum[i], 64 - k * 16 ) != 0 )
	{
	ret = 1;
	goto fail;
	}

	if( verbose != 0 )
	mbedtls_printf( "passed\n" );
	}

	if( verbose != 0 )
	mbedtls_printf( "\n" );

	goto exit;

	fail:
	if( verbose != 0 )
	mbedtls_printf( "failed\n" );

	exit:
	mbedtls_sha512_free( &ctx );
	mbedtls_free( buf );

	return( ret );
	}

	#endif /* MBEDTLS_SELF_TEST */

	#endif /* MBEDTLS_SHA512_C */