library/md5.c - security/mbedtls - Rivoreo Source Code Repositories

 /*
  *  RFC 1321 compliant MD5 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 MD5 algorithm was designed by Ron Rivest in 1991.
  *
  *  http://www.ietf.org/rfc/rfc1321.txt
  */

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

 #if defined(MBEDTLS_MD5_C)

 #include "mbedtls/md5.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_MD5_ALT)

 /* Implementation that should never be optimized out by the compiler */
 static void mbedtls_zeroize( void *v, size_t n ) {
     volatile unsigned char *p = v; while( n-- ) *p++ = 0;
 }

 /*
  * 32-bit integer manipulation macros (little endian)
  */
 #ifndef GET_UINT32_LE
 #define GET_UINT32_LE(n,b,i)                            \
 {                                                       \
     (n) = ( (uint32_t) (b)[(i)    ]       )             \
         | ( (uint32_t) (b)[(i) + 1] <<  8 )             \
         | ( (uint32_t) (b)[(i) + 2] << 16 )             \
         | ( (uint32_t) (b)[(i) + 3] << 24 );            \
 }
 #endif

 #ifndef PUT_UINT32_LE
 #define PUT_UINT32_LE(n,b,i)                                    \
 {                                                               \
     (b)[(i)    ] = (unsigned char) ( ( (n)       ) & 0xFF );    \
     (b)[(i) + 1] = (unsigned char) ( ( (n) >>  8 ) & 0xFF );    \
     (b)[(i) + 2] = (unsigned char) ( ( (n) >> 16 ) & 0xFF );    \
     (b)[(i) + 3] = (unsigned char) ( ( (n) >> 24 ) & 0xFF );    \
 }
 #endif

 void mbedtls_md5_init( mbedtls_md5_context *ctx )
 {
     memset( ctx, 0, sizeof( mbedtls_md5_context ) );
 }

 void mbedtls_md5_free( mbedtls_md5_context *ctx )
 {
     if( ctx == NULL )
         return;

     mbedtls_zeroize( ctx, sizeof( mbedtls_md5_context ) );
 }

 void mbedtls_md5_clone( mbedtls_md5_context *dst,
                         const mbedtls_md5_context *src )
 {
     *dst = *src;
 }

 /*
  * MD5 context setup
  */
 int mbedtls_md5_starts_ext( mbedtls_md5_context *ctx )
 {
     ctx->total[0] = 0;
     ctx->total[1] = 0;

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

     return( 0 );
 }

 #if !defined(MBEDTLS_MD5_PROCESS_ALT)
 int mbedtls_internal_md5_process( mbedtls_md5_context *ctx,
                                   const unsigned char data[64] )
 {
     uint32_t X[16], A, B, C, D;

     GET_UINT32_LE( X[ 0], data,  0 );
     GET_UINT32_LE( X[ 1], data,  4 );
     GET_UINT32_LE( X[ 2], data,  8 );
     GET_UINT32_LE( X[ 3], data, 12 );
     GET_UINT32_LE( X[ 4], data, 16 );
     GET_UINT32_LE( X[ 5], data, 20 );
     GET_UINT32_LE( X[ 6], data, 24 );
     GET_UINT32_LE( X[ 7], data, 28 );
     GET_UINT32_LE( X[ 8], data, 32 );
     GET_UINT32_LE( X[ 9], data, 36 );
     GET_UINT32_LE( X[10], data, 40 );
     GET_UINT32_LE( X[11], data, 44 );
     GET_UINT32_LE( X[12], data, 48 );
     GET_UINT32_LE( X[13], data, 52 );
     GET_UINT32_LE( X[14], data, 56 );
     GET_UINT32_LE( X[15], data, 60 );

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

 #define P(a,b,c,d,k,s,t)                                \
 {                                                       \
     a += F(b,c,d) + X[k] + t; a = S(a,s) + b;           \
 }

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

 #define F(x,y,z) (z ^ (x & (y ^ z)))

     P( A, B, C, D,  0,  7, 0xD76AA478 );
     P( D, A, B, C,  1, 12, 0xE8C7B756 );
     P( C, D, A, B,  2, 17, 0x242070DB );
     P( B, C, D, A,  3, 22, 0xC1BDCEEE );
     P( A, B, C, D,  4,  7, 0xF57C0FAF );
     P( D, A, B, C,  5, 12, 0x4787C62A );
     P( C, D, A, B,  6, 17, 0xA8304613 );
     P( B, C, D, A,  7, 22, 0xFD469501 );
     P( A, B, C, D,  8,  7, 0x698098D8 );
     P( D, A, B, C,  9, 12, 0x8B44F7AF );
     P( C, D, A, B, 10, 17, 0xFFFF5BB1 );
     P( B, C, D, A, 11, 22, 0x895CD7BE );
     P( A, B, C, D, 12,  7, 0x6B901122 );
     P( D, A, B, C, 13, 12, 0xFD987193 );
     P( C, D, A, B, 14, 17, 0xA679438E );
     P( B, C, D, A, 15, 22, 0x49B40821 );

 #undef F

 #define F(x,y,z) (y ^ (z & (x ^ y)))

     P( A, B, C, D,  1,  5, 0xF61E2562 );
     P( D, A, B, C,  6,  9, 0xC040B340 );
     P( C, D, A, B, 11, 14, 0x265E5A51 );
     P( B, C, D, A,  0, 20, 0xE9B6C7AA );
     P( A, B, C, D,  5,  5, 0xD62F105D );
     P( D, A, B, C, 10,  9, 0x02441453 );
     P( C, D, A, B, 15, 14, 0xD8A1E681 );
     P( B, C, D, A,  4, 20, 0xE7D3FBC8 );
     P( A, B, C, D,  9,  5, 0x21E1CDE6 );
     P( D, A, B, C, 14,  9, 0xC33707D6 );
     P( C, D, A, B,  3, 14, 0xF4D50D87 );
     P( B, C, D, A,  8, 20, 0x455A14ED );
     P( A, B, C, D, 13,  5, 0xA9E3E905 );
     P( D, A, B, C,  2,  9, 0xFCEFA3F8 );
     P( C, D, A, B,  7, 14, 0x676F02D9 );
     P( B, C, D, A, 12, 20, 0x8D2A4C8A );

 #undef F

 #define F(x,y,z) (x ^ y ^ z)

     P( A, B, C, D,  5,  4, 0xFFFA3942 );
     P( D, A, B, C,  8, 11, 0x8771F681 );
     P( C, D, A, B, 11, 16, 0x6D9D6122 );
     P( B, C, D, A, 14, 23, 0xFDE5380C );
     P( A, B, C, D,  1,  4, 0xA4BEEA44 );
     P( D, A, B, C,  4, 11, 0x4BDECFA9 );
     P( C, D, A, B,  7, 16, 0xF6BB4B60 );
     P( B, C, D, A, 10, 23, 0xBEBFBC70 );
     P( A, B, C, D, 13,  4, 0x289B7EC6 );
     P( D, A, B, C,  0, 11, 0xEAA127FA );
     P( C, D, A, B,  3, 16, 0xD4EF3085 );
     P( B, C, D, A,  6, 23, 0x04881D05 );
     P( A, B, C, D,  9,  4, 0xD9D4D039 );
     P( D, A, B, C, 12, 11, 0xE6DB99E5 );
     P( C, D, A, B, 15, 16, 0x1FA27CF8 );
     P( B, C, D, A,  2, 23, 0xC4AC5665 );

 #undef F

 #define F(x,y,z) (y ^ (x | ~z))

     P( A, B, C, D,  0,  6, 0xF4292244 );
     P( D, A, B, C,  7, 10, 0x432AFF97 );
     P( C, D, A, B, 14, 15, 0xAB9423A7 );
     P( B, C, D, A,  5, 21, 0xFC93A039 );
     P( A, B, C, D, 12,  6, 0x655B59C3 );
     P( D, A, B, C,  3, 10, 0x8F0CCC92 );
     P( C, D, A, B, 10, 15, 0xFFEFF47D );
     P( B, C, D, A,  1, 21, 0x85845DD1 );
     P( A, B, C, D,  8,  6, 0x6FA87E4F );
     P( D, A, B, C, 15, 10, 0xFE2CE6E0 );
     P( C, D, A, B,  6, 15, 0xA3014314 );
     P( B, C, D, A, 13, 21, 0x4E0811A1 );
     P( A, B, C, D,  4,  6, 0xF7537E82 );
     P( D, A, B, C, 11, 10, 0xBD3AF235 );
     P( C, D, A, B,  2, 15, 0x2AD7D2BB );
     P( B, C, D, A,  9, 21, 0xEB86D391 );

 #undef F

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

     return( 0 );
 }
 #endif /* !MBEDTLS_MD5_PROCESS_ALT */

 /*
  * MD5 process buffer
  */
 int mbedtls_md5_update_ext( mbedtls_md5_context *ctx,
                             const unsigned char *input,
                             size_t ilen )
 {
     int ret;
     size_t fill;
     uint32_t left;

     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_md5_process( ctx, ctx->buffer ) ) != 0 )
             return( ret );

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

     while( ilen >= 64 )
     {
         if( ( ret = mbedtls_internal_md5_process( ctx, input ) ) != 0 )
             return( ret );

         input += 64;
         ilen  -= 64;
     }

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

     return( 0 );
 }

 static const unsigned char md5_padding[64] =
 {
  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
 };

 /*
  * MD5 final digest
  */
 int mbedtls_md5_finish_ext( mbedtls_md5_context *ctx,
                             unsigned char output[16] )
 {
     int ret;
     uint32_t last, padn;
     uint32_t high, low;
     unsigned char msglen[8];

     high = ( ctx->total[0] >> 29 )
          | ( ctx->total[1] <<  3 );
     low  = ( ctx->total[0] <<  3 );

     PUT_UINT32_LE( low,  msglen, 0 );
     PUT_UINT32_LE( high, msglen, 4 );

     last = ctx->total[0] & 0x3F;
     padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );

     if( ( ret = mbedtls_md5_update_ext( ctx, md5_padding, padn ) ) != 0 )
             return( ret );

     if( ( ret = mbedtls_md5_update_ext( ctx, msglen, 8 ) ) != 0 )
             return( ret );

     PUT_UINT32_LE( ctx->state[0], output,  0 );
     PUT_UINT32_LE( ctx->state[1], output,  4 );
     PUT_UINT32_LE( ctx->state[2], output,  8 );
     PUT_UINT32_LE( ctx->state[3], output, 12 );

     return( 0 );
 }

 #endif /* !MBEDTLS_MD5_ALT */

 /*
  * output = MD5( input buffer )
  */
 int mbedtls_md5_ext( const unsigned char *input,
                      size_t ilen,
                      unsigned char output[16] )
 {
     int ret;
     mbedtls_md5_context ctx;

     mbedtls_md5_init( &ctx );

     if( ( ret = mbedtls_md5_starts_ext( &ctx ) ) != 0 )
         goto exit;

     if( ( ret = mbedtls_md5_update_ext( &ctx, input, ilen ) ) != 0 )
         goto exit;

     if( ( ret = mbedtls_md5_finish_ext( &ctx, output ) ) != 0 )
         goto exit;

 exit:
     mbedtls_md5_free( &ctx );

     return( ret );
 }

 #if defined(MBEDTLS_SELF_TEST)
 /*
  * RFC 1321 test vectors
  */
 static const unsigned char md5_test_buf[7][81] =
 {
     { "" },
     { "a" },
     { "abc" },
     { "message digest" },
     { "abcdefghijklmnopqrstuvwxyz" },
     { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" },
     { "12345678901234567890123456789012345678901234567890123456789012"
       "345678901234567890" }
 };

 static const size_t md5_test_buflen[7] =
 {
     0, 1, 3, 14, 26, 62, 80
 };

 static const unsigned char md5_test_sum[7][16] =
 {
     { 0xD4, 0x1D, 0x8C, 0xD9, 0x8F, 0x00, 0xB2, 0x04,
       0xE9, 0x80, 0x09, 0x98, 0xEC, 0xF8, 0x42, 0x7E },
     { 0x0C, 0xC1, 0x75, 0xB9, 0xC0, 0xF1, 0xB6, 0xA8,
       0x31, 0xC3, 0x99, 0xE2, 0x69, 0x77, 0x26, 0x61 },
     { 0x90, 0x01, 0x50, 0x98, 0x3C, 0xD2, 0x4F, 0xB0,
       0xD6, 0x96, 0x3F, 0x7D, 0x28, 0xE1, 0x7F, 0x72 },
     { 0xF9, 0x6B, 0x69, 0x7D, 0x7C, 0xB7, 0x93, 0x8D,
       0x52, 0x5A, 0x2F, 0x31, 0xAA, 0xF1, 0x61, 0xD0 },
     { 0xC3, 0xFC, 0xD3, 0xD7, 0x61, 0x92, 0xE4, 0x00,
       0x7D, 0xFB, 0x49, 0x6C, 0xCA, 0x67, 0xE1, 0x3B },
     { 0xD1, 0x74, 0xAB, 0x98, 0xD2, 0x77, 0xD9, 0xF5,
       0xA5, 0x61, 0x1C, 0x2C, 0x9F, 0x41, 0x9D, 0x9F },
     { 0x57, 0xED, 0xF4, 0xA2, 0x2B, 0xE3, 0xC9, 0x55,
       0xAC, 0x49, 0xDA, 0x2E, 0x21, 0x07, 0xB6, 0x7A }
 };

 /*
  * Checkup routine
  */
 int mbedtls_md5_self_test( int verbose )
 {
     int i, ret = 0;
     unsigned char md5sum[16];

     for( i = 0; i < 7; i++ )
     {
         if( verbose != 0 )
             mbedtls_printf( "  MD5 test #%d: ", i + 1 );

         ret = mbedtls_md5_ext( md5_test_buf[i], md5_test_buflen[i], md5sum );
         if( ret != 0 )
             goto fail;

         if( memcmp( md5sum, md5_test_sum[i], 16 ) != 0 )
         {
             ret = 1;
             goto fail;
         }

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

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

     return( 0 );

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

     return( ret );
 }

 #endif /* MBEDTLS_SELF_TEST */

 #endif /* MBEDTLS_MD5_C */
	/*
	* RFC 1321 compliant MD5 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 MD5 algorithm was designed by Ron Rivest in 1991.
	*
	* http://www.ietf.org/rfc/rfc1321.txt
	*/

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

	#if defined(MBEDTLS_MD5_C)

	#include "mbedtls/md5.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_MD5_ALT)

	/* Implementation that should never be optimized out by the compiler */
	static void mbedtls_zeroize( void *v, size_t n ) {
	volatile unsigned char p = v; while( n-- ) p++ = 0;
	}

	/*
	* 32-bit integer manipulation macros (little endian)
	*/
	#ifndef GET_UINT32_LE
	#define GET_UINT32_LE(n,b,i) \
	{ \
	(n) = ( (uint32_t) (b)[(i) ] ) \
	\| ( (uint32_t) (b)[(i) + 1] << 8 ) \
	\| ( (uint32_t) (b)[(i) + 2] << 16 ) \
	\| ( (uint32_t) (b)[(i) + 3] << 24 ); \
	}
	#endif

	#ifndef PUT_UINT32_LE
	#define PUT_UINT32_LE(n,b,i) \
	{ \
	(b)[(i) ] = (unsigned char) ( ( (n) ) & 0xFF ); \
	(b)[(i) + 1] = (unsigned char) ( ( (n) >> 8 ) & 0xFF ); \
	(b)[(i) + 2] = (unsigned char) ( ( (n) >> 16 ) & 0xFF ); \
	(b)[(i) + 3] = (unsigned char) ( ( (n) >> 24 ) & 0xFF ); \
	}
	#endif

	void mbedtls_md5_init( mbedtls_md5_context *ctx )
	{
	memset( ctx, 0, sizeof( mbedtls_md5_context ) );
	}

	void mbedtls_md5_free( mbedtls_md5_context *ctx )
	{
	if( ctx == NULL )
	return;

	mbedtls_zeroize( ctx, sizeof( mbedtls_md5_context ) );
	}

	void mbedtls_md5_clone( mbedtls_md5_context *dst,
	const mbedtls_md5_context *src )
	{
	dst = src;
	}

	/*
	* MD5 context setup
	*/
	int mbedtls_md5_starts_ext( mbedtls_md5_context *ctx )
	{
	ctx->total[0] = 0;
	ctx->total[1] = 0;

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

	return( 0 );
	}

	#if !defined(MBEDTLS_MD5_PROCESS_ALT)
	int mbedtls_internal_md5_process( mbedtls_md5_context *ctx,
	const unsigned char data[64] )
	{
	uint32_t X[16], A, B, C, D;

	GET_UINT32_LE( X[ 0], data, 0 );
	GET_UINT32_LE( X[ 1], data, 4 );
	GET_UINT32_LE( X[ 2], data, 8 );
	GET_UINT32_LE( X[ 3], data, 12 );
	GET_UINT32_LE( X[ 4], data, 16 );
	GET_UINT32_LE( X[ 5], data, 20 );
	GET_UINT32_LE( X[ 6], data, 24 );
	GET_UINT32_LE( X[ 7], data, 28 );
	GET_UINT32_LE( X[ 8], data, 32 );
	GET_UINT32_LE( X[ 9], data, 36 );
	GET_UINT32_LE( X[10], data, 40 );
	GET_UINT32_LE( X[11], data, 44 );
	GET_UINT32_LE( X[12], data, 48 );
	GET_UINT32_LE( X[13], data, 52 );
	GET_UINT32_LE( X[14], data, 56 );
	GET_UINT32_LE( X[15], data, 60 );

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

	#define P(a,b,c,d,k,s,t) \
	{ \
	a += F(b,c,d) + X[k] + t; a = S(a,s) + b; \
	}

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

	#define F(x,y,z) (z ^ (x & (y ^ z)))

	P( A, B, C, D, 0, 7, 0xD76AA478 );
	P( D, A, B, C, 1, 12, 0xE8C7B756 );
	P( C, D, A, B, 2, 17, 0x242070DB );
	P( B, C, D, A, 3, 22, 0xC1BDCEEE );
	P( A, B, C, D, 4, 7, 0xF57C0FAF );
	P( D, A, B, C, 5, 12, 0x4787C62A );
	P( C, D, A, B, 6, 17, 0xA8304613 );
	P( B, C, D, A, 7, 22, 0xFD469501 );
	P( A, B, C, D, 8, 7, 0x698098D8 );
	P( D, A, B, C, 9, 12, 0x8B44F7AF );
	P( C, D, A, B, 10, 17, 0xFFFF5BB1 );
	P( B, C, D, A, 11, 22, 0x895CD7BE );
	P( A, B, C, D, 12, 7, 0x6B901122 );
	P( D, A, B, C, 13, 12, 0xFD987193 );
	P( C, D, A, B, 14, 17, 0xA679438E );
	P( B, C, D, A, 15, 22, 0x49B40821 );

	#undef F

	#define F(x,y,z) (y ^ (z & (x ^ y)))

	P( A, B, C, D, 1, 5, 0xF61E2562 );
	P( D, A, B, C, 6, 9, 0xC040B340 );
	P( C, D, A, B, 11, 14, 0x265E5A51 );
	P( B, C, D, A, 0, 20, 0xE9B6C7AA );
	P( A, B, C, D, 5, 5, 0xD62F105D );
	P( D, A, B, C, 10, 9, 0x02441453 );
	P( C, D, A, B, 15, 14, 0xD8A1E681 );
	P( B, C, D, A, 4, 20, 0xE7D3FBC8 );
	P( A, B, C, D, 9, 5, 0x21E1CDE6 );
	P( D, A, B, C, 14, 9, 0xC33707D6 );
	P( C, D, A, B, 3, 14, 0xF4D50D87 );
	P( B, C, D, A, 8, 20, 0x455A14ED );
	P( A, B, C, D, 13, 5, 0xA9E3E905 );
	P( D, A, B, C, 2, 9, 0xFCEFA3F8 );
	P( C, D, A, B, 7, 14, 0x676F02D9 );
	P( B, C, D, A, 12, 20, 0x8D2A4C8A );

	#undef F

	#define F(x,y,z) (x ^ y ^ z)

	P( A, B, C, D, 5, 4, 0xFFFA3942 );
	P( D, A, B, C, 8, 11, 0x8771F681 );
	P( C, D, A, B, 11, 16, 0x6D9D6122 );
	P( B, C, D, A, 14, 23, 0xFDE5380C );
	P( A, B, C, D, 1, 4, 0xA4BEEA44 );
	P( D, A, B, C, 4, 11, 0x4BDECFA9 );
	P( C, D, A, B, 7, 16, 0xF6BB4B60 );
	P( B, C, D, A, 10, 23, 0xBEBFBC70 );
	P( A, B, C, D, 13, 4, 0x289B7EC6 );
	P( D, A, B, C, 0, 11, 0xEAA127FA );
	P( C, D, A, B, 3, 16, 0xD4EF3085 );
	P( B, C, D, A, 6, 23, 0x04881D05 );
	P( A, B, C, D, 9, 4, 0xD9D4D039 );
	P( D, A, B, C, 12, 11, 0xE6DB99E5 );
	P( C, D, A, B, 15, 16, 0x1FA27CF8 );
	P( B, C, D, A, 2, 23, 0xC4AC5665 );

	#undef F

	#define F(x,y,z) (y ^ (x \| ~z))

	P( A, B, C, D, 0, 6, 0xF4292244 );
	P( D, A, B, C, 7, 10, 0x432AFF97 );
	P( C, D, A, B, 14, 15, 0xAB9423A7 );
	P( B, C, D, A, 5, 21, 0xFC93A039 );
	P( A, B, C, D, 12, 6, 0x655B59C3 );
	P( D, A, B, C, 3, 10, 0x8F0CCC92 );
	P( C, D, A, B, 10, 15, 0xFFEFF47D );
	P( B, C, D, A, 1, 21, 0x85845DD1 );
	P( A, B, C, D, 8, 6, 0x6FA87E4F );
	P( D, A, B, C, 15, 10, 0xFE2CE6E0 );
	P( C, D, A, B, 6, 15, 0xA3014314 );
	P( B, C, D, A, 13, 21, 0x4E0811A1 );
	P( A, B, C, D, 4, 6, 0xF7537E82 );
	P( D, A, B, C, 11, 10, 0xBD3AF235 );
	P( C, D, A, B, 2, 15, 0x2AD7D2BB );
	P( B, C, D, A, 9, 21, 0xEB86D391 );

	#undef F

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

	return( 0 );
	}
	#endif /* !MBEDTLS_MD5_PROCESS_ALT */

	/*
	* MD5 process buffer
	*/
	int mbedtls_md5_update_ext( mbedtls_md5_context *ctx,
	const unsigned char *input,
	size_t ilen )
	{
	int ret;
	size_t fill;
	uint32_t left;

	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_md5_process( ctx, ctx->buffer ) ) != 0 )
	return( ret );

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

	while( ilen >= 64 )
	{
	if( ( ret = mbedtls_internal_md5_process( ctx, input ) ) != 0 )
	return( ret );

	input += 64;
	ilen -= 64;
	}

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

	return( 0 );
	}

	static const unsigned char md5_padding[64] =
	{
	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
	};

	/*
	* MD5 final digest
	*/
	int mbedtls_md5_finish_ext( mbedtls_md5_context *ctx,
	unsigned char output[16] )
	{
	int ret;
	uint32_t last, padn;
	uint32_t high, low;
	unsigned char msglen[8];

	high = ( ctx->total[0] >> 29 )
	\| ( ctx->total[1] << 3 );
	low = ( ctx->total[0] << 3 );

	PUT_UINT32_LE( low, msglen, 0 );
	PUT_UINT32_LE( high, msglen, 4 );

	last = ctx->total[0] & 0x3F;
	padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );

	if( ( ret = mbedtls_md5_update_ext( ctx, md5_padding, padn ) ) != 0 )
	return( ret );

	if( ( ret = mbedtls_md5_update_ext( ctx, msglen, 8 ) ) != 0 )
	return( ret );

	PUT_UINT32_LE( ctx->state[0], output, 0 );
	PUT_UINT32_LE( ctx->state[1], output, 4 );
	PUT_UINT32_LE( ctx->state[2], output, 8 );
	PUT_UINT32_LE( ctx->state[3], output, 12 );

	return( 0 );
	}

	#endif /* !MBEDTLS_MD5_ALT */

	/*
	* output = MD5( input buffer )
	*/
	int mbedtls_md5_ext( const unsigned char *input,
	size_t ilen,
	unsigned char output[16] )
	{
	int ret;
	mbedtls_md5_context ctx;

	mbedtls_md5_init( &ctx );

	if( ( ret = mbedtls_md5_starts_ext( &ctx ) ) != 0 )
	goto exit;

	if( ( ret = mbedtls_md5_update_ext( &ctx, input, ilen ) ) != 0 )
	goto exit;

	if( ( ret = mbedtls_md5_finish_ext( &ctx, output ) ) != 0 )
	goto exit;

	exit:
	mbedtls_md5_free( &ctx );

	return( ret );
	}

	#if defined(MBEDTLS_SELF_TEST)
	/*
	* RFC 1321 test vectors
	*/
	static const unsigned char md5_test_buf[7][81] =
	{
	{ "" },
	{ "a" },
	{ "abc" },
	{ "message digest" },
	{ "abcdefghijklmnopqrstuvwxyz" },
	{ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" },
	{ "12345678901234567890123456789012345678901234567890123456789012"
	"345678901234567890" }
	};

	static const size_t md5_test_buflen[7] =
	{
	0, 1, 3, 14, 26, 62, 80
	};

	static const unsigned char md5_test_sum[7][16] =
	{
	{ 0xD4, 0x1D, 0x8C, 0xD9, 0x8F, 0x00, 0xB2, 0x04,
	0xE9, 0x80, 0x09, 0x98, 0xEC, 0xF8, 0x42, 0x7E },
	{ 0x0C, 0xC1, 0x75, 0xB9, 0xC0, 0xF1, 0xB6, 0xA8,
	0x31, 0xC3, 0x99, 0xE2, 0x69, 0x77, 0x26, 0x61 },
	{ 0x90, 0x01, 0x50, 0x98, 0x3C, 0xD2, 0x4F, 0xB0,
	0xD6, 0x96, 0x3F, 0x7D, 0x28, 0xE1, 0x7F, 0x72 },
	{ 0xF9, 0x6B, 0x69, 0x7D, 0x7C, 0xB7, 0x93, 0x8D,
	0x52, 0x5A, 0x2F, 0x31, 0xAA, 0xF1, 0x61, 0xD0 },
	{ 0xC3, 0xFC, 0xD3, 0xD7, 0x61, 0x92, 0xE4, 0x00,
	0x7D, 0xFB, 0x49, 0x6C, 0xCA, 0x67, 0xE1, 0x3B },
	{ 0xD1, 0x74, 0xAB, 0x98, 0xD2, 0x77, 0xD9, 0xF5,
	0xA5, 0x61, 0x1C, 0x2C, 0x9F, 0x41, 0x9D, 0x9F },
	{ 0x57, 0xED, 0xF4, 0xA2, 0x2B, 0xE3, 0xC9, 0x55,
	0xAC, 0x49, 0xDA, 0x2E, 0x21, 0x07, 0xB6, 0x7A }
	};

	/*
	* Checkup routine
	*/
	int mbedtls_md5_self_test( int verbose )
	{
	int i, ret = 0;
	unsigned char md5sum[16];

	for( i = 0; i < 7; i++ )
	{
	if( verbose != 0 )
	mbedtls_printf( " MD5 test #%d: ", i + 1 );

	ret = mbedtls_md5_ext( md5_test_buf[i], md5_test_buflen[i], md5sum );
	if( ret != 0 )
	goto fail;

	if( memcmp( md5sum, md5_test_sum[i], 16 ) != 0 )
	{
	ret = 1;
	goto fail;
	}

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

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

	return( 0 );

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

	return( ret );
	}

	#endif /* MBEDTLS_SELF_TEST */

	#endif /* MBEDTLS_MD5_C */