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1/* $OpenBSD: e_des3.c,v 1.19 2015/10/12 06:05:52 guenther Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include <string.h>
61
62#include <openssl/opensslconf.h>
63
64#ifndef OPENSSL_NO_DES
65
66#include <openssl/des.h>
67#include <openssl/evp.h>
68#include <openssl/objects.h>
69
70#include "evp_locl.h"
71
72static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
73 const unsigned char *iv, int enc);
74
75static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
76 const unsigned char *iv, int enc);
77
78static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
79
80typedef struct {
81 DES_key_schedule ks1;/* key schedule */
82 DES_key_schedule ks2;/* key schedule (for ede) */
83 DES_key_schedule ks3;/* key schedule (for ede3) */
84} DES_EDE_KEY;
85
86#define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data)
87
88/* Because of various casts and different args can't use IMPLEMENT_BLOCK_CIPHER */
89
90static int
91des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
92 const unsigned char *in, size_t inl)
93{
94 BLOCK_CIPHER_ecb_loop()
95 DES_ecb3_encrypt((const_DES_cblock *)(in + i), (DES_cblock *)(out + i),
96 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, ctx->encrypt);
97 return 1;
98}
99
100static int
101des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
102 const unsigned char *in, size_t inl)
103{
104 while (inl >= EVP_MAXCHUNK) {
105 DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
106 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
107 (DES_cblock *)ctx->iv, &ctx->num);
108 inl -= EVP_MAXCHUNK;
109 in += EVP_MAXCHUNK;
110 out += EVP_MAXCHUNK;
111 }
112 if (inl)
113 DES_ede3_ofb64_encrypt(in, out, (long)inl,
114 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
115 (DES_cblock *)ctx->iv, &ctx->num);
116
117 return 1;
118}
119
120static int
121des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
122 const unsigned char *in, size_t inl)
123{
124 while (inl >= EVP_MAXCHUNK) {
125 DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK,
126 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
127 (DES_cblock *)ctx->iv, ctx->encrypt);
128 inl -= EVP_MAXCHUNK;
129 in += EVP_MAXCHUNK;
130 out += EVP_MAXCHUNK;
131 }
132 if (inl)
133 DES_ede3_cbc_encrypt(in, out, (long)inl,
134 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
135 (DES_cblock *)ctx->iv, ctx->encrypt);
136 return 1;
137}
138
139static int
140des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
141 const unsigned char *in, size_t inl)
142{
143 while (inl >= EVP_MAXCHUNK) {
144 DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
145 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
146 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
147 inl -= EVP_MAXCHUNK;
148 in += EVP_MAXCHUNK;
149 out += EVP_MAXCHUNK;
150 }
151 if (inl)
152 DES_ede3_cfb64_encrypt(in, out, (long)inl,
153 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
154 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
155 return 1;
156}
157
158/* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right
159 way, so wrap it here */
160static int
161des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
162 const unsigned char *in, size_t inl)
163{
164 size_t n;
165 unsigned char c[1], d[1];
166
167 for (n = 0; n < inl; ++n) {
168 c[0] = (in[n/8]&(1 << (7 - n % 8))) ? 0x80 : 0;
169 DES_ede3_cfb_encrypt(c, d, 1, 1,
170 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
171 (DES_cblock *)ctx->iv, ctx->encrypt);
172 out[n / 8] = (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) |
173 ((d[0] & 0x80) >> (unsigned int)(n % 8));
174 }
175
176 return 1;
177}
178
179static int
180des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
181 const unsigned char *in, size_t inl)
182{
183 while (inl >= EVP_MAXCHUNK) {
184 DES_ede3_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK,
185 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
186 (DES_cblock *)ctx->iv, ctx->encrypt);
187 inl -= EVP_MAXCHUNK;
188 in += EVP_MAXCHUNK;
189 out += EVP_MAXCHUNK;
190 }
191 if (inl)
192 DES_ede3_cfb_encrypt(in, out, 8, (long)inl,
193 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
194 (DES_cblock *)ctx->iv, ctx->encrypt);
195 return 1;
196}
197
198BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
199 EVP_CIPH_RAND_KEY, des_ede_init_key, NULL,
200 EVP_CIPHER_set_asn1_iv,
201 EVP_CIPHER_get_asn1_iv,
202 des3_ctrl)
203
204#define des_ede3_cfb64_cipher des_ede_cfb64_cipher
205#define des_ede3_ofb_cipher des_ede_ofb_cipher
206#define des_ede3_cbc_cipher des_ede_cbc_cipher
207#define des_ede3_ecb_cipher des_ede_ecb_cipher
208
209BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
210 EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL,
211 EVP_CIPHER_set_asn1_iv,
212 EVP_CIPHER_get_asn1_iv,
213 des3_ctrl)
214
215BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 1,
216 EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL,
217 EVP_CIPHER_set_asn1_iv,
218 EVP_CIPHER_get_asn1_iv,
219 des3_ctrl)
220
221BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 8,
222 EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL,
223 EVP_CIPHER_set_asn1_iv,
224 EVP_CIPHER_get_asn1_iv,
225 des3_ctrl)
226
227static int
228des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
229 const unsigned char *iv, int enc)
230{
231 DES_cblock *deskey = (DES_cblock *)key;
232
233 DES_set_key_unchecked(&deskey[0], &data(ctx)->ks1);
234 DES_set_key_unchecked(&deskey[1], &data(ctx)->ks2);
235 memcpy(&data(ctx)->ks3, &data(ctx)->ks1,
236 sizeof(data(ctx)->ks1));
237 return 1;
238}
239
240static int
241des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
242 const unsigned char *iv, int enc)
243{
244 DES_cblock *deskey = (DES_cblock *)key;
245
246
247 DES_set_key_unchecked(&deskey[0], &data(ctx)->ks1);
248 DES_set_key_unchecked(&deskey[1], &data(ctx)->ks2);
249 DES_set_key_unchecked(&deskey[2], &data(ctx)->ks3);
250 return 1;
251}
252
253static int
254des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
255{
256 DES_cblock *deskey = ptr;
257
258 switch (type) {
259 case EVP_CTRL_RAND_KEY:
260 if (DES_random_key(deskey) == 0)
261 return 0;
262 if (c->key_len >= 16 && DES_random_key(deskey + 1) == 0)
263 return 0;
264 if (c->key_len >= 24 && DES_random_key(deskey + 2) == 0)
265 return 0;
266 return 1;
267
268 default:
269 return -1;
270 }
271}
272
273const EVP_CIPHER *
274EVP_des_ede(void)
275{
276 return &des_ede_ecb;
277}
278
279const EVP_CIPHER *
280EVP_des_ede3(void)
281{
282 return &des_ede3_ecb;
283}
284#endif
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