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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, unsigned int 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, unsigned int inl)
101{
102 DES_ede3_ofb64_encrypt(in, out, (long)inl,
103 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
104 (DES_cblock *)ctx->iv, &ctx->num);
105 return 1;
106}
107
108static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
109 const unsigned char *in, unsigned int inl)
110{
111#ifdef KSSL_DEBUG
112 {
113 int i;
114 printf("des_ede_cbc_cipher(ctx=%lx, buflen=%d)\n", (unsigned long)ctx, ctx->buf_len);
115 printf("\t iv= ");
116 for(i=0;i<8;i++)
117 printf("%02X",ctx->iv[i]);
118 printf("\n");
119 }
120#endif /* KSSL_DEBUG */
121 DES_ede3_cbc_encrypt(in, out, (long)inl,
122 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
123 (DES_cblock *)ctx->iv, ctx->encrypt);
124 return 1;
125}
126
127static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
128 const unsigned char *in, unsigned int inl)
129{
130 DES_ede3_cfb64_encrypt(in, out, (long)inl,
131 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
132 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
133 return 1;
134}
135
136/* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right
137 way, so wrap it here */
138static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
139 const unsigned char *in, unsigned int inl)
140 {
141 unsigned int n;
142 unsigned char c[1],d[1];
143
144 for(n=0 ; n < inl ; ++n)
145 {
146 c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
147 DES_ede3_cfb_encrypt(c,d,1,1,
148 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
149 (DES_cblock *)ctx->iv,ctx->encrypt);
150 out[n/8]=(out[n/8]&~(0x80 >> (n%8)))|((d[0]&0x80) >> (n%8));
151 }
152
153 return 1;
154 }
155
156static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
157 const unsigned char *in, unsigned int inl)
158 {
159 DES_ede3_cfb_encrypt(in,out,8,inl,
160 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
161 (DES_cblock *)ctx->iv,ctx->encrypt);
162 return 1;
163 }
164
165BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
166 EVP_CIPH_RAND_KEY|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
167 des_ede_init_key,
168 NULL, NULL, NULL,
169 des3_ctrl)
170
171#define des_ede3_cfb64_cipher des_ede_cfb64_cipher
172#define des_ede3_ofb_cipher des_ede_ofb_cipher
173#define des_ede3_cbc_cipher des_ede_cbc_cipher
174#define des_ede3_ecb_cipher des_ede_ecb_cipher
175
176BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
177 EVP_CIPH_RAND_KEY|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
178 des_ede3_init_key,
179 NULL, NULL, NULL,
180 des3_ctrl)
181
182BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,1,
183 EVP_CIPH_RAND_KEY|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
184 des_ede3_init_key,
185 NULL, NULL, NULL,
186 des3_ctrl)
187
188BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,8,
189 EVP_CIPH_RAND_KEY|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
190 des_ede3_init_key,
191 NULL, NULL, NULL,
192 des3_ctrl)
193
194static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
195 const unsigned char *iv, int enc)
196 {
197 DES_cblock *deskey = (DES_cblock *)key;
198#ifdef EVP_CHECK_DES_KEY
199 if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
200 !! DES_set_key_checked(&deskey[1],&data(ctx)->ks2))
201 return 0;
202#else
203 DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
204 DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
205#endif
206 memcpy(&data(ctx)->ks3,&data(ctx)->ks1,
207 sizeof(data(ctx)->ks1));
208 return 1;
209 }
210
211static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
212 const unsigned char *iv, int enc)
213 {
214 DES_cblock *deskey = (DES_cblock *)key;
215#ifdef KSSL_DEBUG
216 {
217 int i;
218 printf("des_ede3_init_key(ctx=%lx)\n", (unsigned long)ctx);
219 printf("\tKEY= ");
220 for(i=0;i<24;i++) printf("%02X",key[i]); printf("\n");
221 printf("\t IV= ");
222 for(i=0;i<8;i++) printf("%02X",iv[i]); printf("\n");
223 }
224#endif /* KSSL_DEBUG */
225
226#ifdef EVP_CHECK_DES_KEY
227 if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
228 || DES_set_key_checked(&deskey[1],&data(ctx)->ks2)
229 || DES_set_key_checked(&deskey[2],&data(ctx)->ks3))
230 return 0;
231#else
232 DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
233 DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
234 DES_set_key_unchecked(&deskey[2],&data(ctx)->ks3);
235#endif
236 return 1;
237 }
238
239static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
240 {
241
242 DES_cblock *deskey = ptr;
243
244 switch(type)
245 {
246 case EVP_CTRL_RAND_KEY:
247 if (RAND_bytes(ptr, c->key_len) <= 0)
248 return 0;
249 DES_set_odd_parity(deskey);
250 if (c->key_len >= 16)
251 DES_set_odd_parity(deskey + 1);
252 if (c->key_len >= 24)
253 DES_set_odd_parity(deskey + 2);
254 return 1;
255
256 default:
257 return -1;
258 }
259 }
260
261const EVP_CIPHER *EVP_des_ede(void)
262{
263 return &des_ede_ecb;
264}
265
266const EVP_CIPHER *EVP_des_ede3(void)
267{
268 return &des_ede3_ecb;
269}
270#endif
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