1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. |
3 | * |
4 | * Licensed under the Apache License 2.0 (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 | |