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>
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
);
72 /* Because of various casts and different names can't use IMPLEMENT_BLOCK_CIPHER */
74 static int des_ecb_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
75 const unsigned char *in
, unsigned int inl
)
77 BLOCK_CIPHER_ecb_loop()
78 DES_ecb_encrypt((DES_cblock
*)(in
+ i
), (DES_cblock
*)(out
+ i
), ctx
->cipher_data
, ctx
->encrypt
);
82 static int des_ofb_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
83 const unsigned char *in
, unsigned int inl
)
85 DES_ofb64_encrypt(in
, out
, (long)inl
, ctx
->cipher_data
, (DES_cblock
*)ctx
->iv
, &ctx
->num
);
89 static int des_cbc_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
90 const unsigned char *in
, unsigned int inl
)
92 DES_ncbc_encrypt(in
, out
, (long)inl
, ctx
->cipher_data
,
93 (DES_cblock
*)ctx
->iv
, ctx
->encrypt
);
97 static int des_cfb64_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
98 const unsigned char *in
, unsigned int inl
)
100 DES_cfb64_encrypt(in
, out
, (long)inl
, ctx
->cipher_data
,
101 (DES_cblock
*)ctx
->iv
, &ctx
->num
, ctx
->encrypt
);
105 /* Although we have a CFB-r implementation for DES, it doesn't pack the right
106 way, so wrap it here */
107 static int des_cfb1_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
108 const unsigned char *in
, unsigned int inl
)
111 unsigned char c
[1],d
[1];
113 for(n
=0 ; n
< inl
; ++n
)
115 c
[0]=(in
[n
/8]&(1 << (7-n
%8))) ? 0x80 : 0;
116 DES_cfb_encrypt(c
,d
,1,1,ctx
->cipher_data
,(DES_cblock
*)ctx
->iv
,
118 out
[n
/8]=(out
[n
/8]&~(0x80 >> (n
%8)))|((d
[0]&0x80) >> (n
%8));
123 static int des_cfb8_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
124 const unsigned char *in
, unsigned int inl
)
126 DES_cfb_encrypt(in
,out
,8,inl
,ctx
->cipher_data
,(DES_cblock
*)ctx
->iv
,
131 BLOCK_CIPHER_defs(des
, DES_key_schedule
, NID_des
, 8, 8, 8, 64,
132 EVP_CIPH_RAND_KEY
, des_init_key
, NULL
,
133 EVP_CIPHER_set_asn1_iv
,
134 EVP_CIPHER_get_asn1_iv
,
137 BLOCK_CIPHER_def_cfb(des
,DES_key_schedule
,NID_des
,8,8,1,
138 EVP_CIPH_RAND_KEY
, des_init_key
,NULL
,
139 EVP_CIPHER_set_asn1_iv
,
140 EVP_CIPHER_get_asn1_iv
,des_ctrl
)
142 BLOCK_CIPHER_def_cfb(des
,DES_key_schedule
,NID_des
,8,8,8,
143 EVP_CIPH_RAND_KEY
,des_init_key
,NULL
,
144 EVP_CIPHER_set_asn1_iv
,
145 EVP_CIPHER_get_asn1_iv
,des_ctrl
)
147 static int des_init_key(EVP_CIPHER_CTX
*ctx
, const unsigned char *key
,
148 const unsigned char *iv
, int enc
)
150 DES_cblock
*deskey
= (DES_cblock
*)key
;
151 #ifdef EVP_CHECK_DES_KEY
152 if(DES_set_key_checked(deskey
,ctx
->cipher_data
) != 0)
155 DES_set_key_unchecked(deskey
,ctx
->cipher_data
);
160 static int des_ctrl(EVP_CIPHER_CTX
*c
, int type
, int arg
, void *ptr
)
165 case EVP_CTRL_RAND_KEY
:
166 if (RAND_bytes(ptr
, 8) <= 0)
168 DES_set_odd_parity((DES_cblock
*)ptr
);