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031e5cce SM |
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. | |
d3819813 | 52 | * |
031e5cce SM |
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.] | |
3e575651 SL |
57 | */ |
58 | ||
59 | #include <stdio.h> | |
031e5cce | 60 | #include "cryptlib.h" |
3e575651 | 61 | #ifndef OPENSSL_NO_DES |
d3819813 MTL |
62 | # include <openssl/evp.h> |
63 | # include <openssl/objects.h> | |
031e5cce | 64 | # include "evp_locl.h" |
d3819813 MTL |
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 { | |
62f0afa2 MTL |
74 | void (*cbc) (const void *, void *, size_t, |
75 | const DES_key_schedule *, unsigned char *); | |
d3819813 MTL |
76 | } stream; |
77 | } EVP_DES_KEY; | |
78 | ||
79 | # if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__)) | |
62f0afa2 | 80 | /* ----------^^^ this is not a typo, just a way to detect that |
d3819813 MTL |
81 | * assembler support was in general requested... */ |
82 | # include "sparc_arch.h" | |
83 | ||
84 | extern unsigned int OPENSSL_sparcv9cap_P[]; | |
85 | ||
86 | # define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES) | |
87 | ||
88 | void des_t4_key_expand(const void *key, DES_key_schedule *ks); | |
89 | void des_t4_cbc_encrypt(const void *inp, void *out, size_t len, | |
62f0afa2 | 90 | const DES_key_schedule *ks, unsigned char iv[8]); |
d3819813 | 91 | void des_t4_cbc_decrypt(const void *inp, void *out, size_t len, |
62f0afa2 | 92 | const DES_key_schedule *ks, unsigned char iv[8]); |
d3819813 | 93 | # endif |
3e575651 SL |
94 | |
95 | static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, | |
d3819813 | 96 | const unsigned char *iv, int enc); |
3e575651 SL |
97 | static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); |
98 | ||
d3819813 MTL |
99 | /* |
100 | * Because of various casts and different names can't use | |
101 | * IMPLEMENT_BLOCK_CIPHER | |
102 | */ | |
3e575651 SL |
103 | |
104 | static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
d3819813 | 105 | const unsigned char *in, size_t inl) |
3e575651 | 106 | { |
d3819813 MTL |
107 | BLOCK_CIPHER_ecb_loop() |
108 | DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i), | |
031e5cce | 109 | ctx->cipher_data, ctx->encrypt); |
d3819813 | 110 | return 1; |
3e575651 SL |
111 | } |
112 | ||
113 | static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
d3819813 | 114 | const unsigned char *in, size_t inl) |
3e575651 | 115 | { |
d3819813 | 116 | while (inl >= EVP_MAXCHUNK) { |
031e5cce SM |
117 | DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data, |
118 | (DES_cblock *)ctx->iv, &ctx->num); | |
d3819813 MTL |
119 | inl -= EVP_MAXCHUNK; |
120 | in += EVP_MAXCHUNK; | |
121 | out += EVP_MAXCHUNK; | |
122 | } | |
031e5cce SM |
123 | if (inl) |
124 | DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data, | |
125 | (DES_cblock *)ctx->iv, &ctx->num); | |
d3819813 | 126 | return 1; |
3e575651 SL |
127 | } |
128 | ||
129 | static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
d3819813 | 130 | const unsigned char *in, size_t inl) |
3e575651 | 131 | { |
031e5cce | 132 | EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data; |
d3819813 | 133 | |
62f0afa2 | 134 | if (dat->stream.cbc != NULL) { |
031e5cce | 135 | (*dat->stream.cbc) (in, out, inl, &dat->ks.ks, ctx->iv); |
d3819813 MTL |
136 | return 1; |
137 | } | |
138 | while (inl >= EVP_MAXCHUNK) { | |
031e5cce SM |
139 | DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data, |
140 | (DES_cblock *)ctx->iv, ctx->encrypt); | |
d3819813 MTL |
141 | inl -= EVP_MAXCHUNK; |
142 | in += EVP_MAXCHUNK; | |
143 | out += EVP_MAXCHUNK; | |
144 | } | |
145 | if (inl) | |
031e5cce SM |
146 | DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data, |
147 | (DES_cblock *)ctx->iv, ctx->encrypt); | |
d3819813 | 148 | return 1; |
3e575651 SL |
149 | } |
150 | ||
151 | static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
d3819813 | 152 | const unsigned char *in, size_t inl) |
3e575651 | 153 | { |
d3819813 | 154 | while (inl >= EVP_MAXCHUNK) { |
031e5cce SM |
155 | DES_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data, |
156 | (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); | |
d3819813 MTL |
157 | inl -= EVP_MAXCHUNK; |
158 | in += EVP_MAXCHUNK; | |
159 | out += EVP_MAXCHUNK; | |
160 | } | |
031e5cce SM |
161 | if (inl) |
162 | DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data, | |
163 | (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); | |
d3819813 | 164 | return 1; |
3e575651 SL |
165 | } |
166 | ||
d3819813 MTL |
167 | /* |
168 | * Although we have a CFB-r implementation for DES, it doesn't pack the right | |
169 | * way, so wrap it here | |
170 | */ | |
3e575651 | 171 | static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
d3819813 MTL |
172 | const unsigned char *in, size_t inl) |
173 | { | |
174 | size_t n, chunk = EVP_MAXCHUNK / 8; | |
175 | unsigned char c[1], d[1]; | |
176 | ||
177 | if (inl < chunk) | |
178 | chunk = inl; | |
179 | ||
180 | while (inl && inl >= chunk) { | |
181 | for (n = 0; n < chunk * 8; ++n) { | |
182 | c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0; | |
031e5cce SM |
183 | DES_cfb_encrypt(c, d, 1, 1, ctx->cipher_data, |
184 | (DES_cblock *)ctx->iv, ctx->encrypt); | |
d3819813 MTL |
185 | out[n / 8] = |
186 | (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) | | |
187 | ((d[0] & 0x80) >> (unsigned int)(n % 8)); | |
188 | } | |
189 | inl -= chunk; | |
190 | in += chunk; | |
191 | out += chunk; | |
192 | if (inl < chunk) | |
193 | chunk = inl; | |
3e575651 SL |
194 | } |
195 | ||
3e575651 | 196 | return 1; |
d3819813 MTL |
197 | } |
198 | ||
199 | static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
200 | const unsigned char *in, size_t inl) | |
201 | { | |
202 | while (inl >= EVP_MAXCHUNK) { | |
031e5cce SM |
203 | DES_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, ctx->cipher_data, |
204 | (DES_cblock *)ctx->iv, ctx->encrypt); | |
d3819813 MTL |
205 | inl -= EVP_MAXCHUNK; |
206 | in += EVP_MAXCHUNK; | |
207 | out += EVP_MAXCHUNK; | |
3e575651 | 208 | } |
d3819813 | 209 | if (inl) |
031e5cce SM |
210 | DES_cfb_encrypt(in, out, 8, (long)inl, ctx->cipher_data, |
211 | (DES_cblock *)ctx->iv, ctx->encrypt); | |
d3819813 MTL |
212 | return 1; |
213 | } | |
3e575651 | 214 | |
d3819813 MTL |
215 | BLOCK_CIPHER_defs(des, EVP_DES_KEY, NID_des, 8, 8, 8, 64, |
216 | EVP_CIPH_RAND_KEY, des_init_key, NULL, | |
217 | EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl) | |
218 | ||
219 | BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 1, | |
220 | EVP_CIPH_RAND_KEY, des_init_key, NULL, | |
221 | EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl) | |
222 | ||
223 | BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 8, | |
224 | EVP_CIPH_RAND_KEY, des_init_key, NULL, | |
225 | EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl) | |
3e575651 SL |
226 | |
227 | static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, | |
d3819813 MTL |
228 | const unsigned char *iv, int enc) |
229 | { | |
230 | DES_cblock *deskey = (DES_cblock *)key; | |
031e5cce | 231 | EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data; |
d3819813 MTL |
232 | |
233 | dat->stream.cbc = NULL; | |
234 | # if defined(SPARC_DES_CAPABLE) | |
235 | if (SPARC_DES_CAPABLE) { | |
031e5cce | 236 | int mode = ctx->cipher->flags & EVP_CIPH_MODE; |
d3819813 MTL |
237 | |
238 | if (mode == EVP_CIPH_CBC_MODE) { | |
239 | des_t4_key_expand(key, &dat->ks.ks); | |
240 | dat->stream.cbc = enc ? des_t4_cbc_encrypt : des_t4_cbc_decrypt; | |
241 | return 1; | |
242 | } | |
243 | } | |
244 | # endif | |
031e5cce SM |
245 | # ifdef EVP_CHECK_DES_KEY |
246 | if (DES_set_key_checked(deskey, dat->ks.ks) != 0) | |
247 | return 0; | |
248 | # else | |
249 | DES_set_key_unchecked(deskey, ctx->cipher_data); | |
250 | # endif | |
d3819813 MTL |
251 | return 1; |
252 | } | |
3e575651 SL |
253 | |
254 | static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) | |
d3819813 MTL |
255 | { |
256 | ||
257 | switch (type) { | |
258 | case EVP_CTRL_RAND_KEY: | |
259 | if (RAND_bytes(ptr, 8) <= 0) | |
260 | return 0; | |
261 | DES_set_odd_parity((DES_cblock *)ptr); | |
262 | return 1; | |
263 | ||
264 | default: | |
265 | return -1; | |
266 | } | |
267 | } | |
3e575651 SL |
268 | |
269 | #endif |