Line data Source code
1 : /* crypto/evp/e_des.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 : typedef struct {
69 : union {
70 : double align;
71 : DES_key_schedule ks;
72 : } ks;
73 : union {
74 : void (*cbc) (const void *, void *, size_t, const void *, void *);
75 : } stream;
76 : } EVP_DES_KEY;
77 :
78 : # if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
79 : /* ---------^^^ this is not a typo, just a way to detect that
80 : * assembler support was in general requested... */
81 : # include "sparc_arch.h"
82 :
83 : extern unsigned int OPENSSL_sparcv9cap_P[];
84 :
85 : # define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES)
86 :
87 : void des_t4_key_expand(const void *key, DES_key_schedule *ks);
88 : void des_t4_cbc_encrypt(const void *inp, void *out, size_t len,
89 : DES_key_schedule *ks, unsigned char iv[8]);
90 : void des_t4_cbc_decrypt(const void *inp, void *out, size_t len,
91 : DES_key_schedule *ks, unsigned char iv[8]);
92 : # endif
93 :
94 : static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
95 : const unsigned char *iv, int enc);
96 : static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
97 :
98 : /*
99 : * Because of various casts and different names can't use
100 : * IMPLEMENT_BLOCK_CIPHER
101 : */
102 :
103 0 : static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
104 : const unsigned char *in, size_t inl)
105 : {
106 0 : BLOCK_CIPHER_ecb_loop()
107 0 : DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i),
108 0 : ctx->cipher_data, ctx->encrypt);
109 : return 1;
110 : }
111 :
112 0 : static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
113 : const unsigned char *in, size_t inl)
114 : {
115 0 : while (inl >= EVP_MAXCHUNK) {
116 0 : DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
117 0 : (DES_cblock *)ctx->iv, &ctx->num);
118 0 : inl -= EVP_MAXCHUNK;
119 0 : in += EVP_MAXCHUNK;
120 0 : out += EVP_MAXCHUNK;
121 : }
122 0 : if (inl)
123 0 : DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data,
124 0 : (DES_cblock *)ctx->iv, &ctx->num);
125 0 : return 1;
126 : }
127 :
128 0 : static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
129 : const unsigned char *in, size_t inl)
130 : {
131 0 : EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data;
132 :
133 0 : if (dat->stream.cbc) {
134 0 : (*dat->stream.cbc) (in, out, inl, &dat->ks.ks, ctx->iv);
135 0 : return 1;
136 : }
137 0 : while (inl >= EVP_MAXCHUNK) {
138 0 : DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
139 0 : (DES_cblock *)ctx->iv, ctx->encrypt);
140 0 : inl -= EVP_MAXCHUNK;
141 0 : in += EVP_MAXCHUNK;
142 0 : out += EVP_MAXCHUNK;
143 : }
144 0 : if (inl)
145 0 : DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data,
146 0 : (DES_cblock *)ctx->iv, ctx->encrypt);
147 : return 1;
148 : }
149 :
150 0 : static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
151 : const unsigned char *in, size_t inl)
152 : {
153 0 : while (inl >= EVP_MAXCHUNK) {
154 0 : DES_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
155 0 : (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
156 0 : inl -= EVP_MAXCHUNK;
157 0 : in += EVP_MAXCHUNK;
158 0 : out += EVP_MAXCHUNK;
159 : }
160 0 : if (inl)
161 0 : DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data,
162 0 : (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
163 0 : return 1;
164 : }
165 :
166 : /*
167 : * Although we have a CFB-r implementation for DES, it doesn't pack the right
168 : * way, so wrap it here
169 : */
170 0 : static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
171 : const unsigned char *in, size_t inl)
172 : {
173 : size_t n, chunk = EVP_MAXCHUNK / 8;
174 : unsigned char c[1], d[1];
175 :
176 0 : if (inl < chunk)
177 : chunk = inl;
178 :
179 0 : while (inl && inl >= chunk) {
180 0 : for (n = 0; n < chunk * 8; ++n) {
181 0 : c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
182 0 : DES_cfb_encrypt(c, d, 1, 1, ctx->cipher_data,
183 0 : (DES_cblock *)ctx->iv, ctx->encrypt);
184 0 : out[n / 8] =
185 0 : (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) |
186 0 : ((d[0] & 0x80) >> (unsigned int)(n % 8));
187 : }
188 0 : inl -= chunk;
189 0 : in += chunk;
190 0 : out += chunk;
191 0 : if (inl < chunk)
192 : chunk = inl;
193 : }
194 :
195 0 : return 1;
196 : }
197 :
198 0 : static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
199 : const unsigned char *in, size_t inl)
200 : {
201 0 : while (inl >= EVP_MAXCHUNK) {
202 0 : DES_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, ctx->cipher_data,
203 0 : (DES_cblock *)ctx->iv, ctx->encrypt);
204 0 : inl -= EVP_MAXCHUNK;
205 0 : in += EVP_MAXCHUNK;
206 0 : out += EVP_MAXCHUNK;
207 : }
208 0 : if (inl)
209 0 : DES_cfb_encrypt(in, out, 8, (long)inl, ctx->cipher_data,
210 0 : (DES_cblock *)ctx->iv, ctx->encrypt);
211 0 : return 1;
212 : }
213 :
214 605 : BLOCK_CIPHER_defs(des, EVP_DES_KEY, NID_des, 8, 8, 8, 64,
215 : EVP_CIPH_RAND_KEY, des_init_key, NULL,
216 : EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
217 :
218 121 : BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 1,
219 : EVP_CIPH_RAND_KEY, des_init_key, NULL,
220 : EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
221 :
222 121 : BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 8,
223 : EVP_CIPH_RAND_KEY, des_init_key, NULL,
224 : EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
225 :
226 0 : static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
227 : const unsigned char *iv, int enc)
228 : {
229 : DES_cblock *deskey = (DES_cblock *)key;
230 0 : EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data;
231 :
232 0 : dat->stream.cbc = NULL;
233 : # if defined(SPARC_DES_CAPABLE)
234 : if (SPARC_DES_CAPABLE) {
235 : int mode = ctx->cipher->flags & EVP_CIPH_MODE;
236 :
237 : if (mode == EVP_CIPH_CBC_MODE) {
238 : des_t4_key_expand(key, &dat->ks.ks);
239 : dat->stream.cbc = enc ? des_t4_cbc_encrypt : des_t4_cbc_decrypt;
240 : return 1;
241 : }
242 : }
243 : # endif
244 : # ifdef EVP_CHECK_DES_KEY
245 : if (DES_set_key_checked(deskey, dat->ks.ks) != 0)
246 : return 0;
247 : # else
248 0 : DES_set_key_unchecked(deskey, ctx->cipher_data);
249 : # endif
250 0 : return 1;
251 : }
252 :
253 0 : static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
254 : {
255 :
256 0 : switch (type) {
257 : case EVP_CTRL_RAND_KEY:
258 0 : if (RAND_bytes(ptr, 8) <= 0)
259 : return 0;
260 0 : DES_set_odd_parity((DES_cblock *)ptr);
261 0 : return 1;
262 :
263 : default:
264 : return -1;
265 : }
266 : }
267 :
268 : #endif
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