library/md5.c - third_party/github/ARMmbed/mbedtls - Git at Google

 /*
  *  RFC 1321 compliant MD5 implementation
  *
  *  Copyright The Mbed TLS Contributors
  *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
  */
 /*
  *  The MD5 algorithm was designed by Ron Rivest in 1991.
  *
  *  http://www.ietf.org/rfc/rfc1321.txt
  */

 #include "common.h"

 #if defined(MBEDTLS_MD5_C)

 #include "mbedtls/md5.h"
 #include "mbedtls/platform_util.h"
 #include "mbedtls/error.h"

 #include <string.h>

 #include "mbedtls/platform.h"

 #if !defined(MBEDTLS_MD5_ALT)

 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_platform_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(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])
 {
     struct {
         uint32_t X[16], A, B, C, D;
     } local;

     local.X[0] = MBEDTLS_GET_UINT32_LE(data,  0);
     local.X[1] = MBEDTLS_GET_UINT32_LE(data,  4);
     local.X[2] = MBEDTLS_GET_UINT32_LE(data,  8);
     local.X[3] = MBEDTLS_GET_UINT32_LE(data, 12);
     local.X[4] = MBEDTLS_GET_UINT32_LE(data, 16);
     local.X[5] = MBEDTLS_GET_UINT32_LE(data, 20);
     local.X[6] = MBEDTLS_GET_UINT32_LE(data, 24);
     local.X[7] = MBEDTLS_GET_UINT32_LE(data, 28);
     local.X[8] = MBEDTLS_GET_UINT32_LE(data, 32);
     local.X[9] = MBEDTLS_GET_UINT32_LE(data, 36);
     local.X[10] = MBEDTLS_GET_UINT32_LE(data, 40);
     local.X[11] = MBEDTLS_GET_UINT32_LE(data, 44);
     local.X[12] = MBEDTLS_GET_UINT32_LE(data, 48);
     local.X[13] = MBEDTLS_GET_UINT32_LE(data, 52);
     local.X[14] = MBEDTLS_GET_UINT32_LE(data, 56);
     local.X[15] = MBEDTLS_GET_UINT32_LE(data, 60);

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

 #define P(a, b, c, d, k, s, t)                                                \
     do                                                                  \
     {                                                                   \
         (a) += F((b), (c), (d)) + local.X[(k)] + (t);                     \
         (a) = S((a), (s)) + (b);                                         \
     } while (0)

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

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

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

 #undef F

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

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

 #undef F

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

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

 #undef F

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

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

 #undef F

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

     /* Zeroise variables to clear sensitive data from memory. */
     mbedtls_platform_zeroize(&local, sizeof(local));

     return 0;
 }

 #endif /* !MBEDTLS_MD5_PROCESS_ALT */

 /*
  * MD5 process buffer
  */
 int mbedtls_md5_update(mbedtls_md5_context *ctx,
                        const unsigned char *input,
                        size_t ilen)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     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;
 }

 /*
  * MD5 final digest
  */
 int mbedtls_md5_finish(mbedtls_md5_context *ctx,
                        unsigned char output[16])
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     uint32_t used;
     uint32_t high, low;

     /*
      * 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_md5_process(ctx, ctx->buffer)) != 0) {
             goto exit;
         }

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

     /*
      * Add message length
      */
     high = (ctx->total[0] >> 29)
            | (ctx->total[1] <<  3);
     low  = (ctx->total[0] <<  3);

     MBEDTLS_PUT_UINT32_LE(low,  ctx->buffer, 56);
     MBEDTLS_PUT_UINT32_LE(high, ctx->buffer, 60);

     if ((ret = mbedtls_internal_md5_process(ctx, ctx->buffer)) != 0) {
         goto exit;
     }

     /*
      * Output final state
      */
     MBEDTLS_PUT_UINT32_LE(ctx->state[0], output,  0);
     MBEDTLS_PUT_UINT32_LE(ctx->state[1], output,  4);
     MBEDTLS_PUT_UINT32_LE(ctx->state[2], output,  8);
     MBEDTLS_PUT_UINT32_LE(ctx->state[3], output, 12);

     ret = 0;

 exit:
     mbedtls_md5_free(ctx);
     return ret;
 }

 #endif /* !MBEDTLS_MD5_ALT */

 /*
  * output = MD5( input buffer )
  */
 int mbedtls_md5(const unsigned char *input,
                 size_t ilen,
                 unsigned char output[16])
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     mbedtls_md5_context ctx;

     mbedtls_md5_init(&ctx);

     if ((ret = mbedtls_md5_starts(&ctx)) != 0) {
         goto exit;
     }

     if ((ret = mbedtls_md5_update(&ctx, input, ilen)) != 0) {
         goto exit;
     }

     if ((ret = mbedtls_md5_finish(&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" },
     { "12345678901234567890123456789012345678901234567890123456789012345678901234567890" }
 };

 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(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 The Mbed TLS Contributors
	* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
	*/
	/*
	* The MD5 algorithm was designed by Ron Rivest in 1991.
	*
	* http://www.ietf.org/rfc/rfc1321.txt
	*/

	#include "common.h"

	#if defined(MBEDTLS_MD5_C)

	#include "mbedtls/md5.h"
	#include "mbedtls/platform_util.h"
	#include "mbedtls/error.h"

	#include <string.h>

	#include "mbedtls/platform.h"

	#if !defined(MBEDTLS_MD5_ALT)

	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_platform_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(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])
	{
	struct {
	uint32_t X[16], A, B, C, D;
	} local;

	local.X[0] = MBEDTLS_GET_UINT32_LE(data, 0);
	local.X[1] = MBEDTLS_GET_UINT32_LE(data, 4);
	local.X[2] = MBEDTLS_GET_UINT32_LE(data, 8);
	local.X[3] = MBEDTLS_GET_UINT32_LE(data, 12);
	local.X[4] = MBEDTLS_GET_UINT32_LE(data, 16);
	local.X[5] = MBEDTLS_GET_UINT32_LE(data, 20);
	local.X[6] = MBEDTLS_GET_UINT32_LE(data, 24);
	local.X[7] = MBEDTLS_GET_UINT32_LE(data, 28);
	local.X[8] = MBEDTLS_GET_UINT32_LE(data, 32);
	local.X[9] = MBEDTLS_GET_UINT32_LE(data, 36);
	local.X[10] = MBEDTLS_GET_UINT32_LE(data, 40);
	local.X[11] = MBEDTLS_GET_UINT32_LE(data, 44);
	local.X[12] = MBEDTLS_GET_UINT32_LE(data, 48);
	local.X[13] = MBEDTLS_GET_UINT32_LE(data, 52);
	local.X[14] = MBEDTLS_GET_UINT32_LE(data, 56);
	local.X[15] = MBEDTLS_GET_UINT32_LE(data, 60);

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

	#define P(a, b, c, d, k, s, t) \
	do \
	{ \
	(a) += F((b), (c), (d)) + local.X[(k)] + (t); \
	(a) = S((a), (s)) + (b); \
	} while (0)

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

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

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

	#undef F

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

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

	#undef F

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

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

	#undef F

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

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

	#undef F

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

	/* Zeroise variables to clear sensitive data from memory. */
	mbedtls_platform_zeroize(&local, sizeof(local));

	return 0;
	}

	#endif /* !MBEDTLS_MD5_PROCESS_ALT */

	/*
	* MD5 process buffer
	*/
	int mbedtls_md5_update(mbedtls_md5_context *ctx,
	const unsigned char *input,
	size_t ilen)
	{
	int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
	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;
	}

	/*
	* MD5 final digest
	*/
	int mbedtls_md5_finish(mbedtls_md5_context *ctx,
	unsigned char output[16])
	{
	int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
	uint32_t used;
	uint32_t high, low;

	/*
	* 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_md5_process(ctx, ctx->buffer)) != 0) {
	goto exit;
	}

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

	/*
	* Add message length
	*/
	high = (ctx->total[0] >> 29)
	\| (ctx->total[1] << 3);
	low = (ctx->total[0] << 3);

	MBEDTLS_PUT_UINT32_LE(low, ctx->buffer, 56);
	MBEDTLS_PUT_UINT32_LE(high, ctx->buffer, 60);

	if ((ret = mbedtls_internal_md5_process(ctx, ctx->buffer)) != 0) {
	goto exit;
	}

	/*
	* Output final state
	*/
	MBEDTLS_PUT_UINT32_LE(ctx->state[0], output, 0);
	MBEDTLS_PUT_UINT32_LE(ctx->state[1], output, 4);
	MBEDTLS_PUT_UINT32_LE(ctx->state[2], output, 8);
	MBEDTLS_PUT_UINT32_LE(ctx->state[3], output, 12);

	ret = 0;

	exit:
	mbedtls_md5_free(ctx);
	return ret;
	}

	#endif /* !MBEDTLS_MD5_ALT */

	/*
	* output = MD5( input buffer )
	*/
	int mbedtls_md5(const unsigned char *input,
	size_t ilen,
	unsigned char output[16])
	{
	int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
	mbedtls_md5_context ctx;

	mbedtls_md5_init(&ctx);

	if ((ret = mbedtls_md5_starts(&ctx)) != 0) {
	goto exit;
	}

	if ((ret = mbedtls_md5_update(&ctx, input, ilen)) != 0) {
	goto exit;
	}

	if ((ret = mbedtls_md5_finish(&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" },
	{ "12345678901234567890123456789012345678901234567890123456789012345678901234567890" }
	};

	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(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 */