[331] | 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include <stdlib.h>
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| 12 | #include <string.h>
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| 13 | #include <openssl/crypto.h>
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| 14 | #include <openssl/des.h>
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| 15 | #include <openssl/mdc2.h>
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| 16 |
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| 17 | #undef c2l
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| 18 | #define c2l(c,l) (l =((DES_LONG)(*((c)++))) , \
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| 19 | l|=((DES_LONG)(*((c)++)))<< 8L, \
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| 20 | l|=((DES_LONG)(*((c)++)))<<16L, \
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| 21 | l|=((DES_LONG)(*((c)++)))<<24L)
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| 22 |
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| 23 | #undef l2c
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| 24 | #define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
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| 25 | *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
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| 26 | *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
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| 27 | *((c)++)=(unsigned char)(((l)>>24L)&0xff))
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| 28 |
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| 29 | static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len);
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| 30 | int MDC2_Init(MDC2_CTX *c)
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| 31 | {
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| 32 | c->num = 0;
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| 33 | c->pad_type = 1;
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| 34 | memset(&(c->h[0]), 0x52, MDC2_BLOCK);
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| 35 | memset(&(c->hh[0]), 0x25, MDC2_BLOCK);
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| 36 | return 1;
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| 37 | }
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| 38 |
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| 39 | int MDC2_Update(MDC2_CTX *c, const unsigned char *in, size_t len)
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| 40 | {
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| 41 | size_t i, j;
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| 42 |
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| 43 | i = c->num;
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| 44 | if (i != 0) {
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| 45 | if (len < MDC2_BLOCK - i) {
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| 46 | /* partial block */
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| 47 | memcpy(&(c->data[i]), in, len);
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| 48 | c->num += (int)len;
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| 49 | return 1;
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| 50 | } else {
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| 51 | /* filled one */
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| 52 | j = MDC2_BLOCK - i;
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| 53 | memcpy(&(c->data[i]), in, j);
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| 54 | len -= j;
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| 55 | in += j;
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| 56 | c->num = 0;
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| 57 | mdc2_body(c, &(c->data[0]), MDC2_BLOCK);
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| 58 | }
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| 59 | }
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| 60 | i = len & ~((size_t)MDC2_BLOCK - 1);
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| 61 | if (i > 0)
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| 62 | mdc2_body(c, in, i);
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| 63 | j = len - i;
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| 64 | if (j > 0) {
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| 65 | memcpy(&(c->data[0]), &(in[i]), j);
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| 66 | c->num = (int)j;
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| 67 | }
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| 68 | return 1;
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| 69 | }
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| 70 |
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| 71 | static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len)
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| 72 | {
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| 73 | register DES_LONG tin0, tin1;
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| 74 | register DES_LONG ttin0, ttin1;
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| 75 | DES_LONG d[2], dd[2];
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| 76 | DES_key_schedule k;
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| 77 | unsigned char *p;
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| 78 | size_t i;
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| 79 |
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| 80 | for (i = 0; i < len; i += 8) {
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| 81 | c2l(in, tin0);
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| 82 | d[0] = dd[0] = tin0;
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| 83 | c2l(in, tin1);
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| 84 | d[1] = dd[1] = tin1;
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| 85 | c->h[0] = (c->h[0] & 0x9f) | 0x40;
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| 86 | c->hh[0] = (c->hh[0] & 0x9f) | 0x20;
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| 87 |
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| 88 | DES_set_odd_parity(&c->h);
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| 89 | DES_set_key_unchecked(&c->h, &k);
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| 90 | DES_encrypt1(d, &k, 1);
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| 91 |
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| 92 | DES_set_odd_parity(&c->hh);
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| 93 | DES_set_key_unchecked(&c->hh, &k);
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| 94 | DES_encrypt1(dd, &k, 1);
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| 95 |
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| 96 | ttin0 = tin0 ^ dd[0];
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| 97 | ttin1 = tin1 ^ dd[1];
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| 98 | tin0 ^= d[0];
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| 99 | tin1 ^= d[1];
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| 100 |
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| 101 | p = c->h;
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| 102 | l2c(tin0, p);
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| 103 | l2c(ttin1, p);
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| 104 | p = c->hh;
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| 105 | l2c(ttin0, p);
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| 106 | l2c(tin1, p);
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| 107 | }
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| 108 | }
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| 109 |
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| 110 | int MDC2_Final(unsigned char *md, MDC2_CTX *c)
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| 111 | {
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| 112 | unsigned int i;
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| 113 | int j;
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| 114 |
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| 115 | i = c->num;
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| 116 | j = c->pad_type;
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| 117 | if ((i > 0) || (j == 2)) {
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| 118 | if (j == 2)
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| 119 | c->data[i++] = 0x80;
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| 120 | memset(&(c->data[i]), 0, MDC2_BLOCK - i);
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| 121 | mdc2_body(c, c->data, MDC2_BLOCK);
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| 122 | }
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| 123 | memcpy(md, (char *)c->h, MDC2_BLOCK);
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| 124 | memcpy(&(md[MDC2_BLOCK]), (char *)c->hh, MDC2_BLOCK);
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| 125 | return 1;
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| 126 | }
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| 127 |
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| 128 | #undef TEST
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| 129 |
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| 130 | #ifdef TEST
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| 131 | main()
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| 132 | {
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| 133 | unsigned char md[MDC2_DIGEST_LENGTH];
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| 134 | int i;
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| 135 | MDC2_CTX c;
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| 136 | static char *text = "Now is the time for all ";
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| 137 |
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| 138 | MDC2_Init(&c);
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| 139 | MDC2_Update(&c, text, strlen(text));
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| 140 | MDC2_Final(&(md[0]), &c);
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| 141 |
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| 142 | for (i = 0; i < MDC2_DIGEST_LENGTH; i++)
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| 143 | printf("%02X", md[i]);
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| 144 | printf("\n");
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| 145 | }
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| 146 |
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| 147 | #endif
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