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1/* crypto/evp/e_des3.c */
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 "cryptlib.h"
61#ifndef OPENSSL_NO_DES
62#include <openssl/evp.h>
63#include <openssl/objects.h>
64#include "evp_locl.h"
65#include <openssl/des.h>
66#include <openssl/rand.h>
67
68static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
69 const unsigned char *iv,int enc);
70
71static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
72 const unsigned char *iv,int enc);
73
74static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
75
76typedef struct
77 {
78 DES_key_schedule ks1;/* key schedule */
79 DES_key_schedule ks2;/* key schedule (for ede) */
80 DES_key_schedule ks3;/* key schedule (for ede3) */
81 } DES_EDE_KEY;
82
83#define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data)
84
85/* Because of various casts and different args can't use IMPLEMENT_BLOCK_CIPHER */
86
87static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
88 const unsigned char *in, size_t inl)
89{
90 BLOCK_CIPHER_ecb_loop()
91 DES_ecb3_encrypt((const_DES_cblock *)(in + i),
92 (DES_cblock *)(out + i),
93 &data(ctx)->ks1, &data(ctx)->ks2,
94 &data(ctx)->ks3,
95 ctx->encrypt);
96 return 1;
97}
98
99static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
100 const unsigned char *in, size_t inl)
101{
102 if (inl>=EVP_MAXCHUNK)
103 {
104 DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
105 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
106 (DES_cblock *)ctx->iv, &ctx->num);
107 inl-=EVP_MAXCHUNK;
108 in +=EVP_MAXCHUNK;
109 out+=EVP_MAXCHUNK;
110 }
111 if (inl)
112 DES_ede3_ofb64_encrypt(in, out, (long)inl,
113 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
114 (DES_cblock *)ctx->iv, &ctx->num);
115
116 return 1;
117}
118
119static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
120 const unsigned char *in, size_t inl)
121{
122#ifdef KSSL_DEBUG
123 {
124 int i;
125 char *cp;
126 printf("des_ede_cbc_cipher(ctx=%lx, buflen=%d)\n", ctx, ctx->buf_len);
127 printf("\t iv= ");
128 for(i=0;i<8;i++)
129 printf("%02X",ctx->iv[i]);
130 printf("\n");
131 }
132#endif /* KSSL_DEBUG */
133 if (inl>=EVP_MAXCHUNK)
134 {
135 DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK,
136 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
137 (DES_cblock *)ctx->iv, ctx->encrypt);
138 inl-=EVP_MAXCHUNK;
139 in +=EVP_MAXCHUNK;
140 out+=EVP_MAXCHUNK;
141 }
142 if (inl)
143 DES_ede3_cbc_encrypt(in, out, (long)inl,
144 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
145 (DES_cblock *)ctx->iv, ctx->encrypt);
146 return 1;
147}
148
149static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
150 const unsigned char *in, size_t inl)
151{
152 if (inl>=EVP_MAXCHUNK)
153 {
154 DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
155 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
156 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
157 inl-=EVP_MAXCHUNK;
158 in +=EVP_MAXCHUNK;
159 out+=EVP_MAXCHUNK;
160 }
161 if (inl)
162 DES_ede3_cfb64_encrypt(in, out, (long)inl,
163 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
164 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
165 return 1;
166}
167
168/* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right
169 way, so wrap it here */
170static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
171 const unsigned char *in, size_t inl)
172 {
173 size_t n;
174 unsigned char c[1],d[1];
175
176 for(n=0 ; n < inl ; ++n)
177 {
178 c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
179 DES_ede3_cfb_encrypt(c,d,1,1,
180 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
181 (DES_cblock *)ctx->iv,ctx->encrypt);
182 out[n/8]=(out[n/8]&~(0x80 >> (unsigned int)(n%8))) |
183 ((d[0]&0x80) >> (unsigned int)(n%8));
184 }
185
186 return 1;
187 }
188
189static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
190 const unsigned char *in, size_t inl)
191 {
192 while (inl>=EVP_MAXCHUNK)
193 {
194 DES_ede3_cfb_encrypt(in,out,8,(long)EVP_MAXCHUNK,
195 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
196 (DES_cblock *)ctx->iv,ctx->encrypt);
197 inl-=EVP_MAXCHUNK;
198 in +=EVP_MAXCHUNK;
199 out+=EVP_MAXCHUNK;
200 }
201 if (inl)
202 DES_ede3_cfb_encrypt(in,out,8,(long)inl,
203 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
204 (DES_cblock *)ctx->iv,ctx->encrypt);
205 return 1;
206 }
207
208BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
209 EVP_CIPH_RAND_KEY, des_ede_init_key, NULL,
210 EVP_CIPHER_set_asn1_iv,
211 EVP_CIPHER_get_asn1_iv,
212 des3_ctrl)
213
214#define des_ede3_cfb64_cipher des_ede_cfb64_cipher
215#define des_ede3_ofb_cipher des_ede_ofb_cipher
216#define des_ede3_cbc_cipher des_ede_cbc_cipher
217#define des_ede3_ecb_cipher des_ede_ecb_cipher
218
219BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
220 EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL,
221 EVP_CIPHER_set_asn1_iv,
222 EVP_CIPHER_get_asn1_iv,
223 des3_ctrl)
224
225BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,1,
226 EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
227 EVP_CIPHER_set_asn1_iv,
228 EVP_CIPHER_get_asn1_iv,
229 des3_ctrl)
230
231BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,8,
232 EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
233 EVP_CIPHER_set_asn1_iv,
234 EVP_CIPHER_get_asn1_iv,
235 des3_ctrl)
236
237static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
238 const unsigned char *iv, int enc)
239 {
240 DES_cblock *deskey = (DES_cblock *)key;
241#ifdef EVP_CHECK_DES_KEY
242 if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
243 !! DES_set_key_checked(&deskey[1],&data(ctx)->ks2))
244 return 0;
245#else
246 DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
247 DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
248#endif
249 memcpy(&data(ctx)->ks3,&data(ctx)->ks1,
250 sizeof(data(ctx)->ks1));
251 return 1;
252 }
253
254static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
255 const unsigned char *iv, int enc)
256 {
257 DES_cblock *deskey = (DES_cblock *)key;
258#ifdef KSSL_DEBUG
259 {
260 int i;
261 printf("des_ede3_init_key(ctx=%lx)\n", ctx);
262 printf("\tKEY= ");
263 for(i=0;i<24;i++) printf("%02X",key[i]); printf("\n");
264 printf("\t IV= ");
265 for(i=0;i<8;i++) printf("%02X",iv[i]); printf("\n");
266 }
267#endif /* KSSL_DEBUG */
268
269#ifdef EVP_CHECK_DES_KEY
270 if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
271 || DES_set_key_checked(&deskey[1],&data(ctx)->ks2)
272 || DES_set_key_checked(&deskey[2],&data(ctx)->ks3))
273 return 0;
274#else
275 DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
276 DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
277 DES_set_key_unchecked(&deskey[2],&data(ctx)->ks3);
278#endif
279 return 1;
280 }
281
282static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
283 {
284
285 DES_cblock *deskey = ptr;
286
287 switch(type)
288 {
289 case EVP_CTRL_RAND_KEY:
290 if (RAND_bytes(ptr, c->key_len) <= 0)
291 return 0;
292 DES_set_odd_parity(deskey);
293 if (c->key_len >= 16)
294 DES_set_odd_parity(deskey + 1);
295 if (c->key_len >= 24)
296 DES_set_odd_parity(deskey + 2);
297 return 1;
298
299 default:
300 return -1;
301 }
302 }
303
304const EVP_CIPHER *EVP_des_ede(void)
305{
306 return &des_ede_ecb;
307}
308
309const EVP_CIPHER *EVP_des_ede3(void)
310{
311 return &des_ede3_ecb;
312}
313#endif
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