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authorcvs2svn <admin@example.com>2013-02-14 15:11:45 +0000
committercvs2svn <admin@example.com>2013-02-14 15:11:45 +0000
commit6f78006c046d1db00c07d2f9ba014243246a84cc (patch)
treec1e76e693e8d7ff23b9f398e8e4b2470ff4fa565 /src/lib/libcrypto/evp/e_des3.c
parent4383d44ca79eba8836d9f92c612c44ba8aeb87bd (diff)
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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
68#ifndef OPENSSL_FIPS
69
70static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
71 const unsigned char *iv,int enc);
72
73static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
74 const unsigned char *iv,int enc);
75
76static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
77
78typedef struct
79 {
80 DES_key_schedule ks1;/* key schedule */
81 DES_key_schedule ks2;/* key schedule (for ede) */
82 DES_key_schedule ks3;/* key schedule (for ede3) */
83 } DES_EDE_KEY;
84
85#define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data)
86
87/* Because of various casts and different args can't use IMPLEMENT_BLOCK_CIPHER */
88
89static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
90 const unsigned char *in, size_t inl)
91{
92 BLOCK_CIPHER_ecb_loop()
93 DES_ecb3_encrypt((const_DES_cblock *)(in + i),
94 (DES_cblock *)(out + i),
95 &data(ctx)->ks1, &data(ctx)->ks2,
96 &data(ctx)->ks3,
97 ctx->encrypt);
98 return 1;
99}
100
101static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
102 const unsigned char *in, size_t inl)
103{
104 if (inl>=EVP_MAXCHUNK)
105 {
106 DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
107 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
108 (DES_cblock *)ctx->iv, &ctx->num);
109 inl-=EVP_MAXCHUNK;
110 in +=EVP_MAXCHUNK;
111 out+=EVP_MAXCHUNK;
112 }
113 if (inl)
114 DES_ede3_ofb64_encrypt(in, out, (long)inl,
115 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
116 (DES_cblock *)ctx->iv, &ctx->num);
117
118 return 1;
119}
120
121static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
122 const unsigned char *in, size_t inl)
123{
124#ifdef KSSL_DEBUG
125 {
126 int i;
127 char *cp;
128 printf("des_ede_cbc_cipher(ctx=%lx, buflen=%d)\n", ctx, ctx->buf_len);
129 printf("\t iv= ");
130 for(i=0;i<8;i++)
131 printf("%02X",ctx->iv[i]);
132 printf("\n");
133 }
134#endif /* KSSL_DEBUG */
135 if (inl>=EVP_MAXCHUNK)
136 {
137 DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK,
138 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
139 (DES_cblock *)ctx->iv, ctx->encrypt);
140 inl-=EVP_MAXCHUNK;
141 in +=EVP_MAXCHUNK;
142 out+=EVP_MAXCHUNK;
143 }
144 if (inl)
145 DES_ede3_cbc_encrypt(in, out, (long)inl,
146 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
147 (DES_cblock *)ctx->iv, ctx->encrypt);
148 return 1;
149}
150
151static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
152 const unsigned char *in, size_t inl)
153{
154 if (inl>=EVP_MAXCHUNK)
155 {
156 DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
157 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
158 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
159 inl-=EVP_MAXCHUNK;
160 in +=EVP_MAXCHUNK;
161 out+=EVP_MAXCHUNK;
162 }
163 if (inl)
164 DES_ede3_cfb64_encrypt(in, out, (long)inl,
165 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
166 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
167 return 1;
168}
169
170/* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right
171 way, so wrap it here */
172static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
173 const unsigned char *in, size_t inl)
174 {
175 size_t n;
176 unsigned char c[1],d[1];
177
178 for(n=0 ; n < inl ; ++n)
179 {
180 c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
181 DES_ede3_cfb_encrypt(c,d,1,1,
182 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
183 (DES_cblock *)ctx->iv,ctx->encrypt);
184 out[n/8]=(out[n/8]&~(0x80 >> (unsigned int)(n%8))) |
185 ((d[0]&0x80) >> (unsigned int)(n%8));
186 }
187
188 return 1;
189 }
190
191static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
192 const unsigned char *in, size_t inl)
193 {
194 while (inl>=EVP_MAXCHUNK)
195 {
196 DES_ede3_cfb_encrypt(in,out,8,(long)EVP_MAXCHUNK,
197 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
198 (DES_cblock *)ctx->iv,ctx->encrypt);
199 inl-=EVP_MAXCHUNK;
200 in +=EVP_MAXCHUNK;
201 out+=EVP_MAXCHUNK;
202 }
203 if (inl)
204 DES_ede3_cfb_encrypt(in,out,8,(long)inl,
205 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
206 (DES_cblock *)ctx->iv,ctx->encrypt);
207 return 1;
208 }
209
210BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
211 EVP_CIPH_RAND_KEY, des_ede_init_key, NULL,
212 EVP_CIPHER_set_asn1_iv,
213 EVP_CIPHER_get_asn1_iv,
214 des3_ctrl)
215
216#define des_ede3_cfb64_cipher des_ede_cfb64_cipher
217#define des_ede3_ofb_cipher des_ede_ofb_cipher
218#define des_ede3_cbc_cipher des_ede_cbc_cipher
219#define des_ede3_ecb_cipher des_ede_ecb_cipher
220
221BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
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
227BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,1,
228 EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
229 EVP_CIPHER_set_asn1_iv,
230 EVP_CIPHER_get_asn1_iv,
231 des3_ctrl)
232
233BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,8,
234 EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
235 EVP_CIPHER_set_asn1_iv,
236 EVP_CIPHER_get_asn1_iv,
237 des3_ctrl)
238
239static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
240 const unsigned char *iv, int enc)
241 {
242 DES_cblock *deskey = (DES_cblock *)key;
243#ifdef EVP_CHECK_DES_KEY
244 if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
245 !! DES_set_key_checked(&deskey[1],&data(ctx)->ks2))
246 return 0;
247#else
248 DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
249 DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
250#endif
251 memcpy(&data(ctx)->ks3,&data(ctx)->ks1,
252 sizeof(data(ctx)->ks1));
253 return 1;
254 }
255
256static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
257 const unsigned char *iv, int enc)
258 {
259 DES_cblock *deskey = (DES_cblock *)key;
260#ifdef KSSL_DEBUG
261 {
262 int i;
263 printf("des_ede3_init_key(ctx=%lx)\n", ctx);
264 printf("\tKEY= ");
265 for(i=0;i<24;i++) printf("%02X",key[i]); printf("\n");
266 printf("\t IV= ");
267 for(i=0;i<8;i++) printf("%02X",iv[i]); printf("\n");
268 }
269#endif /* KSSL_DEBUG */
270
271#ifdef EVP_CHECK_DES_KEY
272 if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
273 || DES_set_key_checked(&deskey[1],&data(ctx)->ks2)
274 || DES_set_key_checked(&deskey[2],&data(ctx)->ks3))
275 return 0;
276#else
277 DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
278 DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
279 DES_set_key_unchecked(&deskey[2],&data(ctx)->ks3);
280#endif
281 return 1;
282 }
283
284static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
285 {
286
287 DES_cblock *deskey = ptr;
288
289 switch(type)
290 {
291 case EVP_CTRL_RAND_KEY:
292 if (RAND_bytes(ptr, c->key_len) <= 0)
293 return 0;
294 DES_set_odd_parity(deskey);
295 if (c->key_len >= 16)
296 DES_set_odd_parity(deskey + 1);
297 if (c->key_len >= 24)
298 DES_set_odd_parity(deskey + 2);
299 return 1;
300
301 default:
302 return -1;
303 }
304 }
305
306const EVP_CIPHER *EVP_des_ede(void)
307{
308 return &des_ede_ecb;
309}
310
311const EVP_CIPHER *EVP_des_ede3(void)
312{
313 return &des_ede3_ecb;
314}
315#endif
316#endif
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