tool/mbed/mbed-sdk/libraries/net/https/axTLS/crypto/md2.c

   1 /*
   2  * Copyright (c) 2007, Cameron Rich
   3  *
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * * Redistributions of source code must retain the above copyright notice,
  10  *   this list of conditions and the following disclaimer.
  11  * * Redistributions in binary form must reproduce the above copyright notice,
  12  *   this list of conditions and the following disclaimer in the documentation
  13  *   and/or other materials provided with the distribution.
  14  * * Neither the name of the axTLS project nor the names of its contributors
  15  *   may be used to endorse or promote products derived from this software
  16  *   without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  22  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  23  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  24  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  25  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  26  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  27  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /*
  32  *  RFC 1115/1319 compliant MD2 implementation
  33  *  The MD2 algorithm was designed by Ron Rivest in 1989.
  34  *
  35  *  http://www.ietf.org/rfc/rfc1115.txt
  36  *  http://www.ietf.org/rfc/rfc1319.txt
  37  */
  38
  39 #include <string.h>
  40 #include <stdio.h>
  41 #include "os_port.h"
  42 #include "crypto.h"
  43 #include "config.h"
  44
  45 /**
  46  * This code is only here to enable the verification of Verisign root
  47  * certificates. So only enable it for verification mode.
  48  */
  49 #ifdef CONFIG_SSL_CERT_VERIFICATION
  50
  51 static const uint8_t PI_SUBST[256] =
  52 {
  53     0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36,
  54     0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13, 0x62, 0xA7, 0x05, 0xF3,
  55     0xC0, 0xC7, 0x73, 0x8C, 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C,
  56     0x82, 0xCA, 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16,
  57     0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12, 0xBE, 0x4E,
  58     0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 0xA0, 0xFB, 0xF5, 0x8E,
  59     0xBB, 0x2F, 0xEE, 0x7A, 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2,
  60     0x07, 0x3F, 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
  61     0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 0x35, 0x3E,
  62     0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03, 0xFF, 0x19, 0x30, 0xB3,
  63     0x48, 0xA5, 0xB5, 0xD1, 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56,
  64     0xAA, 0xC6, 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6,
  65     0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1, 0x45, 0x9D,
  66     0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 0x86, 0x5B, 0xCF, 0x65,
  67     0xE6, 0x2D, 0xA8, 0x02, 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0,
  68     0xB9, 0xF6, 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
  69     0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 0xC3, 0x5C,
  70     0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26, 0x2C, 0x53, 0x0D, 0x6E,
  71     0x85, 0x28, 0x84, 0x09, 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81,
  72     0x4D, 0x52, 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA,
  73     0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A, 0x78, 0x88,
  74     0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 0xE9, 0xCB, 0xD5, 0xFE,
  75     0x3B, 0x00, 0x1D, 0x39, 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58,
  76     0xD0, 0xE4, 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
  77     0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 0xDB, 0x99,
  78     0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14
  79 };
  80
  81 /*
  82  * MD2 context setup
  83  */
  84 EXP_FUNC void STDCALL MD2_Init(MD2_CTX *ctx)
  85 {
  86     memset(ctx, 0, sizeof *ctx);
  87 }
  88
  89 static void md2_process(MD2_CTX *ctx)
  90 {
  91     int i, j;
  92     uint8_t t = 0;
  93
  94     for (i = 0; i < 16; i++)
  95     {
  96         ctx->state[i + 16] = ctx->buffer[i];
  97         ctx->state[i + 32] = ctx->buffer[i] ^ ctx->state[i];
  98     }
  99
 100     for (i = 0; i < 18; i++)
 101     {
 102         for (j = 0; j < 48; j++)
 103             t = (ctx->state[j] ^= PI_SUBST[t]);
 104
 105         t = (t + i) & 0xFF;
 106     }
 107
 108     t = ctx->cksum[15];
 109
 110     for (i = 0; i < 16; i++)
 111         t = (ctx->cksum[i] ^= PI_SUBST[ctx->buffer[i] ^ t]);
 112 }
 113
 114 /*
 115  * MD2 process buffer
 116  */
 117 EXP_FUNC void STDCALL MD2_Update(MD2_CTX *ctx, const uint8_t *input, int ilen)
 118 {
 119     int fill;
 120
 121     while (ilen > 0)
 122     {
 123         if (ctx->left + ilen > 16)
 124             fill = 16 - ctx->left;
 125         else
 126             fill = ilen;
 127
 128         memcpy(ctx->buffer + ctx->left, input, fill);
 129
 130         ctx->left += fill;
 131         input += fill;
 132         ilen  -= fill;
 133
 134         if (ctx->left == 16)
 135         {
 136             ctx->left = 0;
 137             md2_process(ctx);
 138         }
 139     }
 140 }
 141
 142 /*
 143  * MD2 final digest
 144  */
 145 EXP_FUNC void STDCALL MD2_Final(uint8_t *output, MD2_CTX *ctx)
 146 {
 147     int i;
 148     uint8_t x;
 149
 150     x = (uint8_t)(16 - ctx->left);
 151
 152     for (i = ctx->left; i < 16; i++)
 153         ctx->buffer[i] = x;
 154
 155     md2_process(ctx);
 156
 157     memcpy(ctx->buffer, ctx->cksum, 16);
 158     md2_process(ctx);
 159
 160     memcpy(output, ctx->state, 16);
 161 }
 162
 163 #endif