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>
68 static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
69 const unsigned char *iv, int enc);
70 static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
73 * Because of various casts and different names can't use
74 * IMPLEMENT_BLOCK_CIPHER
77 static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
78 const unsigned char *in, unsigned int inl)
80 BLOCK_CIPHER_ecb_loop()
81 DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i),
82 ctx->cipher_data, ctx->encrypt);
86 static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
87 const unsigned char *in, unsigned int inl)
89 DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data,
90 (DES_cblock *)ctx->iv, &ctx->num);
94 static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
95 const unsigned char *in, unsigned int inl)
97 DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data,
98 (DES_cblock *)ctx->iv, ctx->encrypt);
102 static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
103 const unsigned char *in, unsigned int inl)
105 DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data,
106 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
111 * Although we have a CFB-r implementation for DES, it doesn't pack the right
112 * way, so wrap it here
114 static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
115 const unsigned char *in, unsigned int inl)
118 unsigned char c[1], d[1];
120 for (n = 0; n < inl; ++n) {
121 c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
122 DES_cfb_encrypt(c, d, 1, 1, ctx->cipher_data, (DES_cblock *)ctx->iv,
125 (out[n / 8] & ~(0x80 >> (n % 8))) | ((d[0] & 0x80) >> (n % 8));
130 static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
131 const unsigned char *in, unsigned int inl)
133 DES_cfb_encrypt(in, out, 8, inl, ctx->cipher_data, (DES_cblock *)ctx->iv,
138 BLOCK_CIPHER_defs(des, DES_key_schedule, NID_des, 8, 8, 8, 64,
141 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
144 BLOCK_CIPHER_def_cfb(des, DES_key_schedule, NID_des, 8, 8, 1,
147 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
149 BLOCK_CIPHER_def_cfb(des, DES_key_schedule, NID_des, 8, 8, 8,
152 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
154 static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
155 const unsigned char *iv, int enc)
157 DES_cblock *deskey = (DES_cblock *)key;
158 # ifdef EVP_CHECK_DES_KEY
159 if (DES_set_key_checked(deskey, ctx->cipher_data) != 0)
162 DES_set_key_unchecked(deskey, ctx->cipher_data);
167 static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
171 case EVP_CTRL_RAND_KEY:
172 if (RAND_bytes(ptr, 8) <= 0)
174 DES_set_odd_parity((DES_cblock *)ptr);