text: /*
   *  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/platform_util.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_platform_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 */
  