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