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57ae2e24 | 1 | /* crypto/evp/e_des.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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. | |
0f113f3e | 8 | * |
d02b48c6 RE |
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). | |
0f113f3e | 15 | * |
d02b48c6 RE |
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. | |
0f113f3e | 22 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
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. | |
0f113f3e | 52 | * |
d02b48c6 RE |
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" | |
9e9e8cb6 | 61 | #ifndef OPENSSL_NO_DES |
0f113f3e MC |
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> | |
d02b48c6 | 67 | |
0f113f3e MC |
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; | |
c5d975a7 | 77 | |
0f113f3e | 78 | # if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__)) |
c5d975a7 AP |
79 | /* ---------^^^ this is not a typo, just a way to detect that |
80 | * assembler support was in general requested... */ | |
0f113f3e | 81 | # include "sparc_arch.h" |
c5d975a7 AP |
82 | |
83 | extern unsigned int OPENSSL_sparcv9cap_P[]; | |
84 | ||
0f113f3e | 85 | # define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES) |
c5d975a7 | 86 | |
0f113f3e MC |
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 | |
c5d975a7 | 93 | |
1921eaad | 94 | static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
0f113f3e | 95 | const unsigned char *iv, int enc); |
216659eb | 96 | static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); |
d02b48c6 | 97 | |
0f113f3e MC |
98 | /* |
99 | * Because of various casts and different names can't use | |
100 | * IMPLEMENT_BLOCK_CIPHER | |
101 | */ | |
edf0bfb5 | 102 | |
1921eaad | 103 | static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
0f113f3e | 104 | const unsigned char *in, size_t inl) |
57ae2e24 | 105 | { |
0f113f3e MC |
106 | BLOCK_CIPHER_ecb_loop() |
107 | DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i), | |
108 | ctx->cipher_data, ctx->encrypt); | |
109 | return 1; | |
57ae2e24 | 110 | } |
d02b48c6 | 111 | |
1921eaad | 112 | static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
0f113f3e | 113 | const unsigned char *in, size_t inl) |
57ae2e24 | 114 | { |
0f113f3e MC |
115 | while (inl >= EVP_MAXCHUNK) { |
116 | DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data, | |
117 | (DES_cblock *)ctx->iv, &ctx->num); | |
118 | inl -= EVP_MAXCHUNK; | |
119 | in += EVP_MAXCHUNK; | |
120 | out += EVP_MAXCHUNK; | |
121 | } | |
122 | if (inl) | |
123 | DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data, | |
124 | (DES_cblock *)ctx->iv, &ctx->num); | |
125 | return 1; | |
57ae2e24 DSH |
126 | } |
127 | ||
1921eaad | 128 | static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
0f113f3e | 129 | const unsigned char *in, size_t inl) |
57ae2e24 | 130 | { |
0f113f3e | 131 | EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data; |
c5d975a7 | 132 | |
0f113f3e MC |
133 | if (dat->stream.cbc) { |
134 | (*dat->stream.cbc) (in, out, inl, &dat->ks.ks, ctx->iv); | |
135 | return 1; | |
136 | } | |
137 | while (inl >= EVP_MAXCHUNK) { | |
138 | DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data, | |
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_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data, | |
146 | (DES_cblock *)ctx->iv, ctx->encrypt); | |
147 | return 1; | |
57ae2e24 DSH |
148 | } |
149 | ||
8c6336b0 | 150 | static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
0f113f3e | 151 | const unsigned char *in, size_t inl) |
57ae2e24 | 152 | { |
0f113f3e MC |
153 | while (inl >= EVP_MAXCHUNK) { |
154 | DES_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data, | |
155 | (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); | |
156 | inl -= EVP_MAXCHUNK; | |
157 | in += EVP_MAXCHUNK; | |
158 | out += EVP_MAXCHUNK; | |
159 | } | |
160 | if (inl) | |
161 | DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data, | |
162 | (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); | |
163 | return 1; | |
57ae2e24 DSH |
164 | } |
165 | ||
0f113f3e MC |
166 | /* |
167 | * Although we have a CFB-r implementation for DES, it doesn't pack the right | |
168 | * way, so wrap it here | |
169 | */ | |
8c6336b0 | 170 | static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
0f113f3e MC |
171 | const unsigned char *in, size_t inl) |
172 | { | |
173 | size_t n, chunk = EVP_MAXCHUNK / 8; | |
174 | unsigned char c[1], d[1]; | |
8c6336b0 | 175 | |
0f113f3e MC |
176 | if (inl < chunk) |
177 | chunk = inl; | |
b444ac3e | 178 | |
0f113f3e MC |
179 | while (inl && inl >= chunk) { |
180 | for (n = 0; n < chunk * 8; ++n) { | |
181 | c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0; | |
182 | DES_cfb_encrypt(c, d, 1, 1, ctx->cipher_data, | |
183 | (DES_cblock *)ctx->iv, ctx->encrypt); | |
184 | out[n / 8] = | |
185 | (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) | | |
186 | ((d[0] & 0x80) >> (unsigned int)(n % 8)); | |
187 | } | |
188 | inl -= chunk; | |
189 | in += chunk; | |
190 | out += chunk; | |
191 | if (inl < chunk) | |
192 | chunk = inl; | |
193 | } | |
b444ac3e | 194 | |
8c6336b0 | 195 | return 1; |
0f113f3e | 196 | } |
8c6336b0 AP |
197 | |
198 | static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
0f113f3e MC |
199 | const unsigned char *in, size_t inl) |
200 | { | |
201 | while (inl >= EVP_MAXCHUNK) { | |
202 | DES_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, ctx->cipher_data, | |
203 | (DES_cblock *)ctx->iv, ctx->encrypt); | |
204 | inl -= EVP_MAXCHUNK; | |
205 | in += EVP_MAXCHUNK; | |
206 | out += EVP_MAXCHUNK; | |
207 | } | |
b444ac3e | 208 | if (inl) |
0f113f3e MC |
209 | DES_cfb_encrypt(in, out, 8, (long)inl, ctx->cipher_data, |
210 | (DES_cblock *)ctx->iv, ctx->encrypt); | |
8c6336b0 | 211 | return 1; |
0f113f3e | 212 | } |
8c6336b0 | 213 | |
c5d975a7 | 214 | BLOCK_CIPHER_defs(des, EVP_DES_KEY, NID_des, 8, 8, 8, 64, |
0f113f3e MC |
215 | EVP_CIPH_RAND_KEY, des_init_key, NULL, |
216 | EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl) | |
d02b48c6 | 217 | |
0f113f3e MC |
218 | 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) | |
8c6336b0 | 221 | |
0f113f3e MC |
222 | 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) | |
edf0bfb5 | 225 | |
1921eaad | 226 | static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
0f113f3e MC |
227 | const unsigned char *iv, int enc) |
228 | { | |
229 | DES_cblock *deskey = (DES_cblock *)key; | |
230 | EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data; | |
c5d975a7 | 231 | |
0f113f3e MC |
232 | dat->stream.cbc = NULL; |
233 | # if defined(SPARC_DES_CAPABLE) | |
234 | if (SPARC_DES_CAPABLE) { | |
235 | int mode = ctx->cipher->flags & EVP_CIPH_MODE; | |
c5d975a7 | 236 | |
0f113f3e MC |
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 | DES_set_key_unchecked(deskey, ctx->cipher_data); | |
249 | # endif | |
250 | return 1; | |
251 | } | |
57ae2e24 | 252 | |
216659eb | 253 | static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
0f113f3e MC |
254 | { |
255 | ||
256 | switch (type) { | |
257 | case EVP_CTRL_RAND_KEY: | |
258 | if (RAND_bytes(ptr, 8) <= 0) | |
259 | return 0; | |
260 | DES_set_odd_parity((DES_cblock *)ptr); | |
261 | return 1; | |
216659eb | 262 | |
0f113f3e MC |
263 | default: |
264 | return -1; | |
265 | } | |
266 | } | |
216659eb | 267 | |
d02f751c | 268 | #endif |