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git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/evp/e_des.c
2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include "internal/cryptlib.h"
12 #ifndef OPENSSL_NO_DES
13 # include <openssl/evp.h>
14 # include <openssl/objects.h>
15 # include "internal/evp_int.h"
16 # include <openssl/des.h>
17 # include <openssl/rand.h>
25 void (*cbc
) (const void *, void *, size_t,
26 const DES_key_schedule
*, unsigned char *);
30 # if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
31 /* ----------^^^ this is not a typo, just a way to detect that
32 * assembler support was in general requested... */
33 # include "sparc_arch.h"
35 extern unsigned int OPENSSL_sparcv9cap_P
[];
37 # define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES)
39 void des_t4_key_expand(const void *key
, DES_key_schedule
*ks
);
40 void des_t4_cbc_encrypt(const void *inp
, void *out
, size_t len
,
41 const DES_key_schedule
*ks
, unsigned char iv
[8]);
42 void des_t4_cbc_decrypt(const void *inp
, void *out
, size_t len
,
43 const DES_key_schedule
*ks
, unsigned char iv
[8]);
46 static int des_init_key(EVP_CIPHER_CTX
*ctx
, const unsigned char *key
,
47 const unsigned char *iv
, int enc
);
48 static int des_ctrl(EVP_CIPHER_CTX
*c
, int type
, int arg
, void *ptr
);
51 * Because of various casts and different names can't use
52 * IMPLEMENT_BLOCK_CIPHER
55 static int des_ecb_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
56 const unsigned char *in
, size_t inl
)
58 BLOCK_CIPHER_ecb_loop()
59 DES_ecb_encrypt((DES_cblock
*)(in
+ i
), (DES_cblock
*)(out
+ i
),
60 EVP_CIPHER_CTX_get_cipher_data(ctx
),
61 EVP_CIPHER_CTX_encrypting(ctx
));
65 static int des_ofb_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
66 const unsigned char *in
, size_t inl
)
68 while (inl
>= EVP_MAXCHUNK
) {
69 int num
= EVP_CIPHER_CTX_num(ctx
);
70 DES_ofb64_encrypt(in
, out
, (long)EVP_MAXCHUNK
,
71 EVP_CIPHER_CTX_get_cipher_data(ctx
),
72 (DES_cblock
*)EVP_CIPHER_CTX_iv_noconst(ctx
), &num
);
73 EVP_CIPHER_CTX_set_num(ctx
, num
);
79 int num
= EVP_CIPHER_CTX_num(ctx
);
80 DES_ofb64_encrypt(in
, out
, (long)inl
,
81 EVP_CIPHER_CTX_get_cipher_data(ctx
),
82 (DES_cblock
*)EVP_CIPHER_CTX_iv_noconst(ctx
), &num
);
83 EVP_CIPHER_CTX_set_num(ctx
, num
);
88 static int des_cbc_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
89 const unsigned char *in
, size_t inl
)
91 EVP_DES_KEY
*dat
= (EVP_DES_KEY
*) EVP_CIPHER_CTX_get_cipher_data(ctx
);
93 if (dat
->stream
.cbc
!= NULL
) {
94 (*dat
->stream
.cbc
) (in
, out
, inl
, &dat
->ks
.ks
,
95 EVP_CIPHER_CTX_iv_noconst(ctx
));
98 while (inl
>= EVP_MAXCHUNK
) {
99 DES_ncbc_encrypt(in
, out
, (long)EVP_MAXCHUNK
,
100 EVP_CIPHER_CTX_get_cipher_data(ctx
),
101 (DES_cblock
*)EVP_CIPHER_CTX_iv_noconst(ctx
),
102 EVP_CIPHER_CTX_encrypting(ctx
));
108 DES_ncbc_encrypt(in
, out
, (long)inl
,
109 EVP_CIPHER_CTX_get_cipher_data(ctx
),
110 (DES_cblock
*)EVP_CIPHER_CTX_iv_noconst(ctx
),
111 EVP_CIPHER_CTX_encrypting(ctx
));
115 static int des_cfb64_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
116 const unsigned char *in
, size_t inl
)
118 while (inl
>= EVP_MAXCHUNK
) {
119 int num
= EVP_CIPHER_CTX_num(ctx
);
120 DES_cfb64_encrypt(in
, out
, (long)EVP_MAXCHUNK
,
121 EVP_CIPHER_CTX_get_cipher_data(ctx
),
122 (DES_cblock
*)EVP_CIPHER_CTX_iv_noconst(ctx
), &num
,
123 EVP_CIPHER_CTX_encrypting(ctx
));
124 EVP_CIPHER_CTX_set_num(ctx
, num
);
130 int num
= EVP_CIPHER_CTX_num(ctx
);
131 DES_cfb64_encrypt(in
, out
, (long)inl
,
132 EVP_CIPHER_CTX_get_cipher_data(ctx
),
133 (DES_cblock
*)EVP_CIPHER_CTX_iv_noconst(ctx
), &num
,
134 EVP_CIPHER_CTX_encrypting(ctx
));
135 EVP_CIPHER_CTX_set_num(ctx
, num
);
141 * Although we have a CFB-r implementation for DES, it doesn't pack the right
142 * way, so wrap it here
144 static int des_cfb1_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
145 const unsigned char *in
, size_t inl
)
147 size_t n
, chunk
= EVP_MAXCHUNK
/ 8;
148 unsigned char c
[1], d
[1];
153 while (inl
&& inl
>= chunk
) {
154 for (n
= 0; n
< chunk
* 8; ++n
) {
155 c
[0] = (in
[n
/ 8] & (1 << (7 - n
% 8))) ? 0x80 : 0;
156 DES_cfb_encrypt(c
, d
, 1, 1, EVP_CIPHER_CTX_get_cipher_data(ctx
),
157 (DES_cblock
*)EVP_CIPHER_CTX_iv_noconst(ctx
),
158 EVP_CIPHER_CTX_encrypting(ctx
));
160 (out
[n
/ 8] & ~(0x80 >> (unsigned int)(n
% 8))) |
161 ((d
[0] & 0x80) >> (unsigned int)(n
% 8));
173 static int des_cfb8_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
174 const unsigned char *in
, size_t inl
)
176 while (inl
>= EVP_MAXCHUNK
) {
177 DES_cfb_encrypt(in
, out
, 8, (long)EVP_MAXCHUNK
,
178 EVP_CIPHER_CTX_get_cipher_data(ctx
),
179 (DES_cblock
*)EVP_CIPHER_CTX_iv_noconst(ctx
),
180 EVP_CIPHER_CTX_encrypting(ctx
));
186 DES_cfb_encrypt(in
, out
, 8, (long)inl
,
187 EVP_CIPHER_CTX_get_cipher_data(ctx
),
188 (DES_cblock
*)EVP_CIPHER_CTX_iv_noconst(ctx
),
189 EVP_CIPHER_CTX_encrypting(ctx
));
193 BLOCK_CIPHER_defs(des
, EVP_DES_KEY
, NID_des
, 8, 8, 8, 64,
194 EVP_CIPH_RAND_KEY
, des_init_key
, NULL
,
195 EVP_CIPHER_set_asn1_iv
, EVP_CIPHER_get_asn1_iv
, des_ctrl
)
197 BLOCK_CIPHER_def_cfb(des
, EVP_DES_KEY
, NID_des
, 8, 8, 1,
198 EVP_CIPH_RAND_KEY
, des_init_key
, NULL
,
199 EVP_CIPHER_set_asn1_iv
, EVP_CIPHER_get_asn1_iv
, des_ctrl
)
201 BLOCK_CIPHER_def_cfb(des
, EVP_DES_KEY
, NID_des
, 8, 8, 8,
202 EVP_CIPH_RAND_KEY
, des_init_key
, NULL
,
203 EVP_CIPHER_set_asn1_iv
, EVP_CIPHER_get_asn1_iv
, des_ctrl
)
205 static int des_init_key(EVP_CIPHER_CTX
*ctx
, const unsigned char *key
,
206 const unsigned char *iv
, int enc
)
208 DES_cblock
*deskey
= (DES_cblock
*)key
;
209 EVP_DES_KEY
*dat
= (EVP_DES_KEY
*) EVP_CIPHER_CTX_get_cipher_data(ctx
);
211 dat
->stream
.cbc
= NULL
;
212 # if defined(SPARC_DES_CAPABLE)
213 if (SPARC_DES_CAPABLE
) {
214 int mode
= EVP_CIPHER_CTX_mode(ctx
);
216 if (mode
== EVP_CIPH_CBC_MODE
) {
217 des_t4_key_expand(key
, &dat
->ks
.ks
);
218 dat
->stream
.cbc
= enc
? des_t4_cbc_encrypt
: des_t4_cbc_decrypt
;
223 DES_set_key_unchecked(deskey
, EVP_CIPHER_CTX_get_cipher_data(ctx
));
227 static int des_ctrl(EVP_CIPHER_CTX
*c
, int type
, int arg
, void *ptr
)
231 case EVP_CTRL_RAND_KEY
:
232 if (RAND_priv_bytes(ptr
, 8) <= 0)
234 DES_set_odd_parity((DES_cblock
*)ptr
);