1 /* crypto/evp/e_des.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
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>
74 void (*cbc) (const void *, void *, size_t,
75 const DES_key_schedule *, unsigned char *);
79 # if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
80 /* ----------^^^ this is not a typo, just a way to detect that
81 * assembler support was in general requested... */
82 # include "sparc_arch.h"
84 extern unsigned int OPENSSL_sparcv9cap_P[];
86 # define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES)
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,
90 const DES_key_schedule *ks, unsigned char iv[8]);
91 void des_t4_cbc_decrypt(const void *inp, void *out, size_t len,
92 const DES_key_schedule *ks, unsigned char iv[8]);
95 static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
96 const unsigned char *iv, int enc);
97 static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
100 * Because of various casts and different names can't use
101 * IMPLEMENT_BLOCK_CIPHER
104 static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
105 const unsigned char *in, size_t inl)
107 BLOCK_CIPHER_ecb_loop()
108 DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i),
109 ctx->cipher_data, ctx->encrypt);
113 static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
114 const unsigned char *in, size_t inl)
116 while (inl >= EVP_MAXCHUNK) {
117 DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
118 (DES_cblock *)ctx->iv, &ctx->num);
124 DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data,
125 (DES_cblock *)ctx->iv, &ctx->num);
129 static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
130 const unsigned char *in, size_t inl)
132 EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data;
134 if (dat->stream.cbc != NULL) {
135 (*dat->stream.cbc) (in, out, inl, &dat->ks.ks, ctx->iv);
138 while (inl >= EVP_MAXCHUNK) {
139 DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
140 (DES_cblock *)ctx->iv, ctx->encrypt);
146 DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data,
147 (DES_cblock *)ctx->iv, ctx->encrypt);
151 static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
152 const unsigned char *in, size_t inl)
154 while (inl >= EVP_MAXCHUNK) {
155 DES_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
156 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
162 DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data,
163 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
168 * Although we have a CFB-r implementation for DES, it doesn't pack the right
169 * way, so wrap it here
171 static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
172 const unsigned char *in, size_t inl)
174 size_t n, chunk = EVP_MAXCHUNK / 8;
175 unsigned char c[1], d[1];
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;
183 DES_cfb_encrypt(c, d, 1, 1, ctx->cipher_data,
184 (DES_cblock *)ctx->iv, ctx->encrypt);
186 (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) |
187 ((d[0] & 0x80) >> (unsigned int)(n % 8));
199 static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
200 const unsigned char *in, size_t inl)
202 while (inl >= EVP_MAXCHUNK) {
203 DES_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, ctx->cipher_data,
204 (DES_cblock *)ctx->iv, ctx->encrypt);
210 DES_cfb_encrypt(in, out, 8, (long)inl, ctx->cipher_data,
211 (DES_cblock *)ctx->iv, ctx->encrypt);
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)
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)
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)
227 static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
228 const unsigned char *iv, int enc)
230 DES_cblock *deskey = (DES_cblock *)key;
231 EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data;
233 dat->stream.cbc = NULL;
234 # if defined(SPARC_DES_CAPABLE)
235 if (SPARC_DES_CAPABLE) {
236 int mode = ctx->cipher->flags & EVP_CIPH_MODE;
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;
245 # ifdef EVP_CHECK_DES_KEY
246 if (DES_set_key_checked(deskey, dat->ks.ks) != 0)
249 DES_set_key_unchecked(deskey, ctx->cipher_data);
254 static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
258 case EVP_CTRL_RAND_KEY:
259 if (RAND_bytes(ptr, 8) <= 0)
261 DES_set_odd_parity((DES_cblock *)ptr);