library/sha1.c - security/mbedtls - Rivoreo Source Code Repositories

 /*
  *  FIPS-180-1 compliant SHA-1 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-1 standard was published by NIST in 1993.
  *
  *  http://www.itl.nist.gov/fipspubs/fip180-1.htm
  */

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

 #if defined(MBEDTLS_SHA1_C)

 #include "mbedtls/sha1.h"
 #include "mbedtls/platform_util.h"

 #include <string.h>

 #if defined(MBEDTLS_SELF_TEST)
 #if defined(MBEDTLS_PLATFORM_C)
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
 #define mbedtls_printf printf
 #endif /* MBEDTLS_PLATFORM_C */
 #endif /* MBEDTLS_SELF_TEST */

 #if !defined(MBEDTLS_SHA1_ALT)

 /*
  * 32-bit integer manipulation macros (big endian)
  */
 #ifndef GET_UINT32_BE
 #define GET_UINT32_BE(n,b,i)                            \
 {                                                       \
     (n) = ( (uint32_t) (b)[(i)    ] << 24 )             \
         | ( (uint32_t) (b)[(i) + 1] << 16 )             \
         | ( (uint32_t) (b)[(i) + 2] <<  8 )             \
         | ( (uint32_t) (b)[(i) + 3]       );            \
 }
 #endif

 #ifndef PUT_UINT32_BE
 #define PUT_UINT32_BE(n,b,i)                            \
 {                                                       \
     (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)       );       \
 }
 #endif

 #define MBEDTLS_SHA1_VALIDATE_RET(cond)                             \
     MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_SHA1_BAD_INPUT_DATA )

 #define MBEDTLS_SHA1_VALIDATE(cond)  MBEDTLS_INTERNAL_VALIDATE( cond )

 void mbedtls_sha1_init( mbedtls_sha1_context *ctx )
 {
     MBEDTLS_SHA1_VALIDATE( ctx != NULL );

     memset( ctx, 0, sizeof( mbedtls_sha1_context ) );
 }

 void mbedtls_sha1_free( mbedtls_sha1_context *ctx )
 {
     if( ctx == NULL )
         return;

     mbedtls_platform_zeroize( ctx, sizeof( mbedtls_sha1_context ) );
 }

 void mbedtls_sha1_clone( mbedtls_sha1_context *dst,
                          const mbedtls_sha1_context *src )
 {
     MBEDTLS_SHA1_VALIDATE( dst != NULL );
     MBEDTLS_SHA1_VALIDATE( src != NULL );

     *dst = *src;
 }

 /*
  * SHA-1 context setup
  */
 int mbedtls_sha1_starts_ret( mbedtls_sha1_context *ctx )
 {
     MBEDTLS_SHA1_VALIDATE_RET( ctx != NULL );

     ctx->total[0] = 0;
     ctx->total[1] = 0;

     ctx->state[0] = 0x67452301;
     ctx->state[1] = 0xEFCDAB89;
     ctx->state[2] = 0x98BADCFE;
     ctx->state[3] = 0x10325476;
     ctx->state[4] = 0xC3D2E1F0;

     return( 0 );
 }

 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 void mbedtls_sha1_starts( mbedtls_sha1_context *ctx )
 {
     mbedtls_sha1_starts_ret( ctx );
 }
 #endif

 #if !defined(MBEDTLS_SHA1_PROCESS_ALT)
 int mbedtls_internal_sha1_process( mbedtls_sha1_context *ctx,
                                    const unsigned char data[64] )
 {
     uint32_t temp, W[16], A, B, C, D, E;

     MBEDTLS_SHA1_VALIDATE_RET( ctx != NULL );
     MBEDTLS_SHA1_VALIDATE_RET( (const unsigned char *)data != NULL );

     GET_UINT32_BE( W[ 0], data,  0 );
     GET_UINT32_BE( W[ 1], data,  4 );
     GET_UINT32_BE( W[ 2], data,  8 );
     GET_UINT32_BE( W[ 3], data, 12 );
     GET_UINT32_BE( W[ 4], data, 16 );
     GET_UINT32_BE( W[ 5], data, 20 );
     GET_UINT32_BE( W[ 6], data, 24 );
     GET_UINT32_BE( W[ 7], data, 28 );
     GET_UINT32_BE( W[ 8], data, 32 );
     GET_UINT32_BE( W[ 9], data, 36 );
     GET_UINT32_BE( W[10], data, 40 );
     GET_UINT32_BE( W[11], data, 44 );
     GET_UINT32_BE( W[12], data, 48 );
     GET_UINT32_BE( W[13], data, 52 );
     GET_UINT32_BE( W[14], data, 56 );
     GET_UINT32_BE( W[15], data, 60 );

 #define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))

 #define R(t)                                            \
 (                                                       \
     temp = W[( t -  3 ) & 0x0F] ^ W[( t - 8 ) & 0x0F] ^ \
            W[( t - 14 ) & 0x0F] ^ W[  t       & 0x0F],  \
     ( W[t & 0x0F] = S(temp,1) )                         \
 )

 #define P(a,b,c,d,e,x)                                  \
 {                                                       \
     e += S(a,5) + F(b,c,d) + K + x; b = S(b,30);        \
 }

     A = ctx->state[0];
     B = ctx->state[1];
     C = ctx->state[2];
     D = ctx->state[3];
     E = ctx->state[4];

 #define F(x,y,z) (z ^ (x & (y ^ z)))
 #define K 0x5A827999

     P( A, B, C, D, E, W[0]  );
     P( E, A, B, C, D, W[1]  );
     P( D, E, A, B, C, W[2]  );
     P( C, D, E, A, B, W[3]  );
     P( B, C, D, E, A, W[4]  );
     P( A, B, C, D, E, W[5]  );
     P( E, A, B, C, D, W[6]  );
     P( D, E, A, B, C, W[7]  );
     P( C, D, E, A, B, W[8]  );
     P( B, C, D, E, A, W[9]  );
     P( A, B, C, D, E, W[10] );
     P( E, A, B, C, D, W[11] );
     P( D, E, A, B, C, W[12] );
     P( C, D, E, A, B, W[13] );
     P( B, C, D, E, A, W[14] );
     P( A, B, C, D, E, W[15] );
     P( E, A, B, C, D, R(16) );
     P( D, E, A, B, C, R(17) );
     P( C, D, E, A, B, R(18) );
     P( B, C, D, E, A, R(19) );

 #undef K
 #undef F

 #define F(x,y,z) (x ^ y ^ z)
 #define K 0x6ED9EBA1

     P( A, B, C, D, E, R(20) );
     P( E, A, B, C, D, R(21) );
     P( D, E, A, B, C, R(22) );
     P( C, D, E, A, B, R(23) );
     P( B, C, D, E, A, R(24) );
     P( A, B, C, D, E, R(25) );
     P( E, A, B, C, D, R(26) );
     P( D, E, A, B, C, R(27) );
     P( C, D, E, A, B, R(28) );
     P( B, C, D, E, A, R(29) );
     P( A, B, C, D, E, R(30) );
     P( E, A, B, C, D, R(31) );
     P( D, E, A, B, C, R(32) );
     P( C, D, E, A, B, R(33) );
     P( B, C, D, E, A, R(34) );
     P( A, B, C, D, E, R(35) );
     P( E, A, B, C, D, R(36) );
     P( D, E, A, B, C, R(37) );
     P( C, D, E, A, B, R(38) );
     P( B, C, D, E, A, R(39) );

 #undef K
 #undef F

 #define F(x,y,z) ((x & y) | (z & (x | y)))
 #define K 0x8F1BBCDC

     P( A, B, C, D, E, R(40) );
     P( E, A, B, C, D, R(41) );
     P( D, E, A, B, C, R(42) );
     P( C, D, E, A, B, R(43) );
     P( B, C, D, E, A, R(44) );
     P( A, B, C, D, E, R(45) );
     P( E, A, B, C, D, R(46) );
     P( D, E, A, B, C, R(47) );
     P( C, D, E, A, B, R(48) );
     P( B, C, D, E, A, R(49) );
     P( A, B, C, D, E, R(50) );
     P( E, A, B, C, D, R(51) );
     P( D, E, A, B, C, R(52) );
     P( C, D, E, A, B, R(53) );
     P( B, C, D, E, A, R(54) );
     P( A, B, C, D, E, R(55) );
     P( E, A, B, C, D, R(56) );
     P( D, E, A, B, C, R(57) );
     P( C, D, E, A, B, R(58) );
     P( B, C, D, E, A, R(59) );

 #undef K
 #undef F

 #define F(x,y,z) (x ^ y ^ z)
 #define K 0xCA62C1D6

     P( A, B, C, D, E, R(60) );
     P( E, A, B, C, D, R(61) );
     P( D, E, A, B, C, R(62) );
     P( C, D, E, A, B, R(63) );
     P( B, C, D, E, A, R(64) );
     P( A, B, C, D, E, R(65) );
     P( E, A, B, C, D, R(66) );
     P( D, E, A, B, C, R(67) );
     P( C, D, E, A, B, R(68) );
     P( B, C, D, E, A, R(69) );
     P( A, B, C, D, E, R(70) );
     P( E, A, B, C, D, R(71) );
     P( D, E, A, B, C, R(72) );
     P( C, D, E, A, B, R(73) );
     P( B, C, D, E, A, R(74) );
     P( A, B, C, D, E, R(75) );
     P( E, A, B, C, D, R(76) );
     P( D, E, A, B, C, R(77) );
     P( C, D, E, A, B, R(78) );
     P( B, C, D, E, A, R(79) );

 #undef K
 #undef F

     ctx->state[0] += A;
     ctx->state[1] += B;
     ctx->state[2] += C;
     ctx->state[3] += D;
     ctx->state[4] += E;

     return( 0 );
 }

 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 void mbedtls_sha1_process( mbedtls_sha1_context *ctx,
                            const unsigned char data[64] )
 {
     mbedtls_internal_sha1_process( ctx, data );
 }
 #endif
 #endif /* !MBEDTLS_SHA1_PROCESS_ALT */

 /*
  * SHA-1 process buffer
  */
 int mbedtls_sha1_update_ret( mbedtls_sha1_context *ctx,
                              const unsigned char *input,
                              size_t ilen )
 {
     int ret;
     size_t fill;
     uint32_t left;

     MBEDTLS_SHA1_VALIDATE_RET( ctx != NULL );
     MBEDTLS_SHA1_VALIDATE_RET( ilen == 0 || input != NULL );

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

     left = ctx->total[0] & 0x3F;
     fill = 64 - left;

     ctx->total[0] += (uint32_t) ilen;
     ctx->total[0] &= 0xFFFFFFFF;

     if( ctx->total[0] < (uint32_t) ilen )
         ctx->total[1]++;

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

         if( ( ret = mbedtls_internal_sha1_process( ctx, ctx->buffer ) ) != 0 )
             return( ret );

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

     while( ilen >= 64 )
     {
         if( ( ret = mbedtls_internal_sha1_process( ctx, input ) ) != 0 )
             return( ret );

         input += 64;
         ilen  -= 64;
     }

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

     return( 0 );
 }

 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 void mbedtls_sha1_update( mbedtls_sha1_context *ctx,
                           const unsigned char *input,
                           size_t ilen )
 {
     mbedtls_sha1_update_ret( ctx, input, ilen );
 }
 #endif

 /*
  * SHA-1 final digest
  */
 int mbedtls_sha1_finish_ret( mbedtls_sha1_context *ctx,
                              unsigned char output[20] )
 {
     int ret;
     uint32_t used;
     uint32_t high, low;

     MBEDTLS_SHA1_VALIDATE_RET( ctx != NULL );
     MBEDTLS_SHA1_VALIDATE_RET( (unsigned char *)output != NULL );

     /*
      * Add padding: 0x80 then 0x00 until 8 bytes remain for the length
      */
     used = ctx->total[0] & 0x3F;

     ctx->buffer[used++] = 0x80;

     if( used <= 56 )
     {
         /* Enough room for padding + length in current block */
         memset( ctx->buffer + used, 0, 56 - used );
     }
     else
     {
         /* We'll need an extra block */
         memset( ctx->buffer + used, 0, 64 - used );

         if( ( ret = mbedtls_internal_sha1_process( ctx, ctx->buffer ) ) != 0 )
             return( ret );

         memset( ctx->buffer, 0, 56 );
     }

     /*
      * Add message length
      */
     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 );

     if( ( ret = mbedtls_internal_sha1_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 );

     return( 0 );
 }

 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 void mbedtls_sha1_finish( mbedtls_sha1_context *ctx,
                           unsigned char output[20] )
 {
     mbedtls_sha1_finish_ret( ctx, output );
 }
 #endif

 #endif /* !MBEDTLS_SHA1_ALT */

 /*
  * output = SHA-1( input buffer )
  */
 int mbedtls_sha1_ret( const unsigned char *input,
                       size_t ilen,
                       unsigned char output[20] )
 {
     int ret;
     mbedtls_sha1_context ctx;

     MBEDTLS_SHA1_VALIDATE_RET( ilen == 0 || input != NULL );
     MBEDTLS_SHA1_VALIDATE_RET( (unsigned char *)output != NULL );

     mbedtls_sha1_init( &ctx );

     if( ( ret = mbedtls_sha1_starts_ret( &ctx ) ) != 0 )
         goto exit;

     if( ( ret = mbedtls_sha1_update_ret( &ctx, input, ilen ) ) != 0 )
         goto exit;

     if( ( ret = mbedtls_sha1_finish_ret( &ctx, output ) ) != 0 )
         goto exit;

 exit:
     mbedtls_sha1_free( &ctx );

     return( ret );
 }

 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 void mbedtls_sha1( const unsigned char *input,
                    size_t ilen,
                    unsigned char output[20] )
 {
     mbedtls_sha1_ret( input, ilen, output );
 }
 #endif

 #if defined(MBEDTLS_SELF_TEST)
 /*
  * FIPS-180-1 test vectors
  */
 static const unsigned char sha1_test_buf[3][57] =
 {
     { "abc" },
     { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" },
     { "" }
 };

 static const size_t sha1_test_buflen[3] =
 {
     3, 56, 1000
 };

 static const unsigned char sha1_test_sum[3][20] =
 {
     { 0xA9, 0x99, 0x3E, 0x36, 0x47, 0x06, 0x81, 0x6A, 0xBA, 0x3E,
       0x25, 0x71, 0x78, 0x50, 0xC2, 0x6C, 0x9C, 0xD0, 0xD8, 0x9D },
     { 0x84, 0x98, 0x3E, 0x44, 0x1C, 0x3B, 0xD2, 0x6E, 0xBA, 0xAE,
       0x4A, 0xA1, 0xF9, 0x51, 0x29, 0xE5, 0xE5, 0x46, 0x70, 0xF1 },
     { 0x34, 0xAA, 0x97, 0x3C, 0xD4, 0xC4, 0xDA, 0xA4, 0xF6, 0x1E,
       0xEB, 0x2B, 0xDB, 0xAD, 0x27, 0x31, 0x65, 0x34, 0x01, 0x6F }
 };

 /*
  * Checkup routine
  */
 int mbedtls_sha1_self_test( int verbose )
 {
     int i, j, buflen, ret = 0;
     unsigned char buf[1024];
     unsigned char sha1sum[20];
     mbedtls_sha1_context ctx;

     mbedtls_sha1_init( &ctx );

     /*
      * SHA-1
      */
     for( i = 0; i < 3; i++ )
     {
         if( verbose != 0 )
             mbedtls_printf( "  SHA-1 test #%d: ", i + 1 );

         if( ( ret = mbedtls_sha1_starts_ret( &ctx ) ) != 0 )
             goto fail;

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

             for( j = 0; j < 1000; j++ )
             {
                 ret = mbedtls_sha1_update_ret( &ctx, buf, buflen );
                 if( ret != 0 )
                     goto fail;
             }
         }
         else
         {
             ret = mbedtls_sha1_update_ret( &ctx, sha1_test_buf[i],
                                            sha1_test_buflen[i] );
             if( ret != 0 )
                 goto fail;
         }

         if( ( ret = mbedtls_sha1_finish_ret( &ctx, sha1sum ) ) != 0 )
             goto fail;

         if( memcmp( sha1sum, sha1_test_sum[i], 20 ) != 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_sha1_free( &ctx );

     return( ret );
 }

 #endif /* MBEDTLS_SELF_TEST */

 #endif /* MBEDTLS_SHA1_C */
	/*
	* FIPS-180-1 compliant SHA-1 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-1 standard was published by NIST in 1993.
	*
	* http://www.itl.nist.gov/fipspubs/fip180-1.htm
	*/

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

	#if defined(MBEDTLS_SHA1_C)

	#include "mbedtls/sha1.h"
	#include "mbedtls/platform_util.h"

	#include <string.h>

	#if defined(MBEDTLS_SELF_TEST)
	#if defined(MBEDTLS_PLATFORM_C)
	#include "mbedtls/platform.h"
	#else
	#include <stdio.h>
	#define mbedtls_printf printf
	#endif /* MBEDTLS_PLATFORM_C */
	#endif /* MBEDTLS_SELF_TEST */

	#if !defined(MBEDTLS_SHA1_ALT)

	/*
	* 32-bit integer manipulation macros (big endian)
	*/
	#ifndef GET_UINT32_BE
	#define GET_UINT32_BE(n,b,i) \
	{ \
	(n) = ( (uint32_t) (b)[(i) ] << 24 ) \
	\| ( (uint32_t) (b)[(i) + 1] << 16 ) \
	\| ( (uint32_t) (b)[(i) + 2] << 8 ) \
	\| ( (uint32_t) (b)[(i) + 3] ); \
	}
	#endif

	#ifndef PUT_UINT32_BE
	#define PUT_UINT32_BE(n,b,i) \
	{ \
	(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) ); \
	}
	#endif

	#define MBEDTLS_SHA1_VALIDATE_RET(cond) \
	MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_SHA1_BAD_INPUT_DATA )

	#define MBEDTLS_SHA1_VALIDATE(cond) MBEDTLS_INTERNAL_VALIDATE( cond )

	void mbedtls_sha1_init( mbedtls_sha1_context *ctx )
	{
	MBEDTLS_SHA1_VALIDATE( ctx != NULL );

	memset( ctx, 0, sizeof( mbedtls_sha1_context ) );
	}

	void mbedtls_sha1_free( mbedtls_sha1_context *ctx )
	{
	if( ctx == NULL )
	return;

	mbedtls_platform_zeroize( ctx, sizeof( mbedtls_sha1_context ) );
	}

	void mbedtls_sha1_clone( mbedtls_sha1_context *dst,
	const mbedtls_sha1_context *src )
	{
	MBEDTLS_SHA1_VALIDATE( dst != NULL );
	MBEDTLS_SHA1_VALIDATE( src != NULL );

	dst = src;
	}

	/*
	* SHA-1 context setup
	*/
	int mbedtls_sha1_starts_ret( mbedtls_sha1_context *ctx )
	{
	MBEDTLS_SHA1_VALIDATE_RET( ctx != NULL );

	ctx->total[0] = 0;
	ctx->total[1] = 0;

	ctx->state[0] = 0x67452301;
	ctx->state[1] = 0xEFCDAB89;
	ctx->state[2] = 0x98BADCFE;
	ctx->state[3] = 0x10325476;
	ctx->state[4] = 0xC3D2E1F0;

	return( 0 );
	}

	#if !defined(MBEDTLS_DEPRECATED_REMOVED)
	void mbedtls_sha1_starts( mbedtls_sha1_context *ctx )
	{
	mbedtls_sha1_starts_ret( ctx );
	}
	#endif

	#if !defined(MBEDTLS_SHA1_PROCESS_ALT)
	int mbedtls_internal_sha1_process( mbedtls_sha1_context *ctx,
	const unsigned char data[64] )
	{
	uint32_t temp, W[16], A, B, C, D, E;

	MBEDTLS_SHA1_VALIDATE_RET( ctx != NULL );
	MBEDTLS_SHA1_VALIDATE_RET( (const unsigned char *)data != NULL );

	GET_UINT32_BE( W[ 0], data, 0 );
	GET_UINT32_BE( W[ 1], data, 4 );
	GET_UINT32_BE( W[ 2], data, 8 );
	GET_UINT32_BE( W[ 3], data, 12 );
	GET_UINT32_BE( W[ 4], data, 16 );
	GET_UINT32_BE( W[ 5], data, 20 );
	GET_UINT32_BE( W[ 6], data, 24 );
	GET_UINT32_BE( W[ 7], data, 28 );
	GET_UINT32_BE( W[ 8], data, 32 );
	GET_UINT32_BE( W[ 9], data, 36 );
	GET_UINT32_BE( W[10], data, 40 );
	GET_UINT32_BE( W[11], data, 44 );
	GET_UINT32_BE( W[12], data, 48 );
	GET_UINT32_BE( W[13], data, 52 );
	GET_UINT32_BE( W[14], data, 56 );
	GET_UINT32_BE( W[15], data, 60 );

	#define S(x,n) ((x << n) \| ((x & 0xFFFFFFFF) >> (32 - n)))

	#define R(t) \
	( \
	temp = W[( t - 3 ) & 0x0F] ^ W[( t - 8 ) & 0x0F] ^ \
	W[( t - 14 ) & 0x0F] ^ W[ t & 0x0F], \
	( W[t & 0x0F] = S(temp,1) ) \
	)

	#define P(a,b,c,d,e,x) \
	{ \
	e += S(a,5) + F(b,c,d) + K + x; b = S(b,30); \
	}

	A = ctx->state[0];
	B = ctx->state[1];
	C = ctx->state[2];
	D = ctx->state[3];
	E = ctx->state[4];

	#define F(x,y,z) (z ^ (x & (y ^ z)))
	#define K 0x5A827999

	P( A, B, C, D, E, W[0] );
	P( E, A, B, C, D, W[1] );
	P( D, E, A, B, C, W[2] );
	P( C, D, E, A, B, W[3] );
	P( B, C, D, E, A, W[4] );
	P( A, B, C, D, E, W[5] );
	P( E, A, B, C, D, W[6] );
	P( D, E, A, B, C, W[7] );
	P( C, D, E, A, B, W[8] );
	P( B, C, D, E, A, W[9] );
	P( A, B, C, D, E, W[10] );
	P( E, A, B, C, D, W[11] );
	P( D, E, A, B, C, W[12] );
	P( C, D, E, A, B, W[13] );
	P( B, C, D, E, A, W[14] );
	P( A, B, C, D, E, W[15] );
	P( E, A, B, C, D, R(16) );
	P( D, E, A, B, C, R(17) );
	P( C, D, E, A, B, R(18) );
	P( B, C, D, E, A, R(19) );

	#undef K
	#undef F

	#define F(x,y,z) (x ^ y ^ z)
	#define K 0x6ED9EBA1

	P( A, B, C, D, E, R(20) );
	P( E, A, B, C, D, R(21) );
	P( D, E, A, B, C, R(22) );
	P( C, D, E, A, B, R(23) );
	P( B, C, D, E, A, R(24) );
	P( A, B, C, D, E, R(25) );
	P( E, A, B, C, D, R(26) );
	P( D, E, A, B, C, R(27) );
	P( C, D, E, A, B, R(28) );
	P( B, C, D, E, A, R(29) );
	P( A, B, C, D, E, R(30) );
	P( E, A, B, C, D, R(31) );
	P( D, E, A, B, C, R(32) );
	P( C, D, E, A, B, R(33) );
	P( B, C, D, E, A, R(34) );
	P( A, B, C, D, E, R(35) );
	P( E, A, B, C, D, R(36) );
	P( D, E, A, B, C, R(37) );
	P( C, D, E, A, B, R(38) );
	P( B, C, D, E, A, R(39) );

	#undef K
	#undef F

	#define F(x,y,z) ((x & y) \| (z & (x \| y)))
	#define K 0x8F1BBCDC

	P( A, B, C, D, E, R(40) );
	P( E, A, B, C, D, R(41) );
	P( D, E, A, B, C, R(42) );
	P( C, D, E, A, B, R(43) );
	P( B, C, D, E, A, R(44) );
	P( A, B, C, D, E, R(45) );
	P( E, A, B, C, D, R(46) );
	P( D, E, A, B, C, R(47) );
	P( C, D, E, A, B, R(48) );
	P( B, C, D, E, A, R(49) );
	P( A, B, C, D, E, R(50) );
	P( E, A, B, C, D, R(51) );
	P( D, E, A, B, C, R(52) );
	P( C, D, E, A, B, R(53) );
	P( B, C, D, E, A, R(54) );
	P( A, B, C, D, E, R(55) );
	P( E, A, B, C, D, R(56) );
	P( D, E, A, B, C, R(57) );
	P( C, D, E, A, B, R(58) );
	P( B, C, D, E, A, R(59) );

	#undef K
	#undef F

	#define F(x,y,z) (x ^ y ^ z)
	#define K 0xCA62C1D6

	P( A, B, C, D, E, R(60) );
	P( E, A, B, C, D, R(61) );
	P( D, E, A, B, C, R(62) );
	P( C, D, E, A, B, R(63) );
	P( B, C, D, E, A, R(64) );
	P( A, B, C, D, E, R(65) );
	P( E, A, B, C, D, R(66) );
	P( D, E, A, B, C, R(67) );
	P( C, D, E, A, B, R(68) );
	P( B, C, D, E, A, R(69) );
	P( A, B, C, D, E, R(70) );
	P( E, A, B, C, D, R(71) );
	P( D, E, A, B, C, R(72) );
	P( C, D, E, A, B, R(73) );
	P( B, C, D, E, A, R(74) );
	P( A, B, C, D, E, R(75) );
	P( E, A, B, C, D, R(76) );
	P( D, E, A, B, C, R(77) );
	P( C, D, E, A, B, R(78) );
	P( B, C, D, E, A, R(79) );

	#undef K
	#undef F

	ctx->state[0] += A;
	ctx->state[1] += B;
	ctx->state[2] += C;
	ctx->state[3] += D;
	ctx->state[4] += E;

	return( 0 );
	}

	#if !defined(MBEDTLS_DEPRECATED_REMOVED)
	void mbedtls_sha1_process( mbedtls_sha1_context *ctx,
	const unsigned char data[64] )
	{
	mbedtls_internal_sha1_process( ctx, data );
	}
	#endif
	#endif /* !MBEDTLS_SHA1_PROCESS_ALT */

	/*
	* SHA-1 process buffer
	*/
	int mbedtls_sha1_update_ret( mbedtls_sha1_context *ctx,
	const unsigned char *input,
	size_t ilen )
	{
	int ret;
	size_t fill;
	uint32_t left;

	MBEDTLS_SHA1_VALIDATE_RET( ctx != NULL );
	MBEDTLS_SHA1_VALIDATE_RET( ilen == 0 \|\| input != NULL );

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

	left = ctx->total[0] & 0x3F;
	fill = 64 - left;

	ctx->total[0] += (uint32_t) ilen;
	ctx->total[0] &= 0xFFFFFFFF;

	if( ctx->total[0] < (uint32_t) ilen )
	ctx->total[1]++;

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

	if( ( ret = mbedtls_internal_sha1_process( ctx, ctx->buffer ) ) != 0 )
	return( ret );

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

	while( ilen >= 64 )
	{
	if( ( ret = mbedtls_internal_sha1_process( ctx, input ) ) != 0 )
	return( ret );

	input += 64;
	ilen -= 64;
	}

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

	return( 0 );
	}

	#if !defined(MBEDTLS_DEPRECATED_REMOVED)
	void mbedtls_sha1_update( mbedtls_sha1_context *ctx,
	const unsigned char *input,
	size_t ilen )
	{
	mbedtls_sha1_update_ret( ctx, input, ilen );
	}
	#endif

	/*
	* SHA-1 final digest
	*/
	int mbedtls_sha1_finish_ret( mbedtls_sha1_context *ctx,
	unsigned char output[20] )
	{
	int ret;
	uint32_t used;
	uint32_t high, low;

	MBEDTLS_SHA1_VALIDATE_RET( ctx != NULL );
	MBEDTLS_SHA1_VALIDATE_RET( (unsigned char *)output != NULL );

	/*
	* Add padding: 0x80 then 0x00 until 8 bytes remain for the length
	*/
	used = ctx->total[0] & 0x3F;

	ctx->buffer[used++] = 0x80;

	if( used <= 56 )
	{
	/* Enough room for padding + length in current block */
	memset( ctx->buffer + used, 0, 56 - used );
	}
	else
	{
	/* We'll need an extra block */
	memset( ctx->buffer + used, 0, 64 - used );

	if( ( ret = mbedtls_internal_sha1_process( ctx, ctx->buffer ) ) != 0 )
	return( ret );

	memset( ctx->buffer, 0, 56 );
	}

	/*
	* Add message length
	*/
	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 );

	if( ( ret = mbedtls_internal_sha1_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 );

	return( 0 );
	}

	#if !defined(MBEDTLS_DEPRECATED_REMOVED)
	void mbedtls_sha1_finish( mbedtls_sha1_context *ctx,
	unsigned char output[20] )
	{
	mbedtls_sha1_finish_ret( ctx, output );
	}
	#endif

	#endif /* !MBEDTLS_SHA1_ALT */

	/*
	* output = SHA-1( input buffer )
	*/
	int mbedtls_sha1_ret( const unsigned char *input,
	size_t ilen,
	unsigned char output[20] )
	{
	int ret;
	mbedtls_sha1_context ctx;

	MBEDTLS_SHA1_VALIDATE_RET( ilen == 0 \|\| input != NULL );
	MBEDTLS_SHA1_VALIDATE_RET( (unsigned char *)output != NULL );

	mbedtls_sha1_init( &ctx );

	if( ( ret = mbedtls_sha1_starts_ret( &ctx ) ) != 0 )
	goto exit;

	if( ( ret = mbedtls_sha1_update_ret( &ctx, input, ilen ) ) != 0 )
	goto exit;

	if( ( ret = mbedtls_sha1_finish_ret( &ctx, output ) ) != 0 )
	goto exit;

	exit:
	mbedtls_sha1_free( &ctx );

	return( ret );
	}

	#if !defined(MBEDTLS_DEPRECATED_REMOVED)
	void mbedtls_sha1( const unsigned char *input,
	size_t ilen,
	unsigned char output[20] )
	{
	mbedtls_sha1_ret( input, ilen, output );
	}
	#endif

	#if defined(MBEDTLS_SELF_TEST)
	/*
	* FIPS-180-1 test vectors
	*/
	static const unsigned char sha1_test_buf[3][57] =
	{
	{ "abc" },
	{ "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" },
	{ "" }
	};

	static const size_t sha1_test_buflen[3] =
	{
	3, 56, 1000
	};

	static const unsigned char sha1_test_sum[3][20] =
	{
	{ 0xA9, 0x99, 0x3E, 0x36, 0x47, 0x06, 0x81, 0x6A, 0xBA, 0x3E,
	0x25, 0x71, 0x78, 0x50, 0xC2, 0x6C, 0x9C, 0xD0, 0xD8, 0x9D },
	{ 0x84, 0x98, 0x3E, 0x44, 0x1C, 0x3B, 0xD2, 0x6E, 0xBA, 0xAE,
	0x4A, 0xA1, 0xF9, 0x51, 0x29, 0xE5, 0xE5, 0x46, 0x70, 0xF1 },
	{ 0x34, 0xAA, 0x97, 0x3C, 0xD4, 0xC4, 0xDA, 0xA4, 0xF6, 0x1E,
	0xEB, 0x2B, 0xDB, 0xAD, 0x27, 0x31, 0x65, 0x34, 0x01, 0x6F }
	};

	/*
	* Checkup routine
	*/
	int mbedtls_sha1_self_test( int verbose )
	{
	int i, j, buflen, ret = 0;
	unsigned char buf[1024];
	unsigned char sha1sum[20];
	mbedtls_sha1_context ctx;

	mbedtls_sha1_init( &ctx );

	/*
	* SHA-1
	*/
	for( i = 0; i < 3; i++ )
	{
	if( verbose != 0 )
	mbedtls_printf( " SHA-1 test #%d: ", i + 1 );

	if( ( ret = mbedtls_sha1_starts_ret( &ctx ) ) != 0 )
	goto fail;

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

	for( j = 0; j < 1000; j++ )
	{
	ret = mbedtls_sha1_update_ret( &ctx, buf, buflen );
	if( ret != 0 )
	goto fail;
	}
	}
	else
	{
	ret = mbedtls_sha1_update_ret( &ctx, sha1_test_buf[i],
	sha1_test_buflen[i] );
	if( ret != 0 )
	goto fail;
	}

	if( ( ret = mbedtls_sha1_finish_ret( &ctx, sha1sum ) ) != 0 )
	goto fail;

	if( memcmp( sha1sum, sha1_test_sum[i], 20 ) != 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_sha1_free( &ctx );

	return( ret );
	}

	#endif /* MBEDTLS_SELF_TEST */

	#endif /* MBEDTLS_SHA1_C */