1 | /* |
2 | * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved. |
3 | * |
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 |
8 | */ |
9 | |
10 | #include <stdio.h> |
11 | #include "internal/cryptlib.h" |
12 | #ifndef OPENSSL_NO_DES |
13 | # include <openssl/evp.h> |
14 | # include <openssl/objects.h> |
15 | # include "crypto/evp.h" |
16 | # include <openssl/des.h> |
17 | # include <openssl/rand.h> |
18 | |
19 | typedef struct { |
20 | union { |
21 | OSSL_UNION_ALIGN; |
22 | DES_key_schedule ks; |
23 | } ks; |
24 | union { |
25 | void (*cbc) (const void *, void *, size_t, |
26 | const DES_key_schedule *, unsigned char *); |
27 | } stream; |
28 | } EVP_DES_KEY; |
29 | |
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" |
34 | |
35 | extern unsigned int OPENSSL_sparcv9cap_P[]; |
36 | |
37 | # define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES) |
38 | |
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]); |
44 | # endif |
45 | |
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); |
49 | |
50 | /* |
51 | * Because of various casts and different names can't use |
52 | * IMPLEMENT_BLOCK_CIPHER |
53 | */ |
54 | |
55 | static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
56 | const unsigned char *in, size_t inl) |
57 | { |
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)); |
62 | return 1; |
63 | } |
64 | |
65 | static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
66 | const unsigned char *in, size_t inl) |
67 | { |
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); |
74 | inl -= EVP_MAXCHUNK; |
75 | in += EVP_MAXCHUNK; |
76 | out += EVP_MAXCHUNK; |
77 | } |
78 | if (inl) { |
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); |
84 | } |
85 | return 1; |
86 | } |
87 | |
88 | static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
89 | const unsigned char *in, size_t inl) |
90 | { |
91 | EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_get_cipher_data(ctx); |
92 | |
93 | if (dat->stream.cbc != NULL) { |
94 | (*dat->stream.cbc) (in, out, inl, &dat->ks.ks, |
95 | EVP_CIPHER_CTX_iv_noconst(ctx)); |
96 | return 1; |
97 | } |
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)); |
103 | inl -= EVP_MAXCHUNK; |
104 | in += EVP_MAXCHUNK; |
105 | out += EVP_MAXCHUNK; |
106 | } |
107 | if (inl) |
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)); |
112 | return 1; |
113 | } |
114 | |
115 | static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
116 | const unsigned char *in, size_t inl) |
117 | { |
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); |
125 | inl -= EVP_MAXCHUNK; |
126 | in += EVP_MAXCHUNK; |
127 | out += EVP_MAXCHUNK; |
128 | } |
129 | if (inl) { |
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); |
136 | } |
137 | return 1; |
138 | } |
139 | |
140 | /* |
141 | * Although we have a CFB-r implementation for DES, it doesn't pack the right |
142 | * way, so wrap it here |
143 | */ |
144 | static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
145 | const unsigned char *in, size_t inl) |
146 | { |
147 | size_t n, chunk = EVP_MAXCHUNK / 8; |
148 | unsigned char c[1], d[1]; |
149 | |
150 | if (inl < chunk) |
151 | chunk = inl; |
152 | |
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)); |
159 | out[n / 8] = |
160 | (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) | |
161 | ((d[0] & 0x80) >> (unsigned int)(n % 8)); |
162 | } |
163 | inl -= chunk; |
164 | in += chunk; |
165 | out += chunk; |
166 | if (inl < chunk) |
167 | chunk = inl; |
168 | } |
169 | |
170 | return 1; |
171 | } |
172 | |
173 | static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
174 | const unsigned char *in, size_t inl) |
175 | { |
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)); |
181 | inl -= EVP_MAXCHUNK; |
182 | in += EVP_MAXCHUNK; |
183 | out += EVP_MAXCHUNK; |
184 | } |
185 | if (inl) |
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)); |
190 | return 1; |
191 | } |
192 | |
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) |
196 | |
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) |
200 | |
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) |
204 | |
205 | static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
206 | const unsigned char *iv, int enc) |
207 | { |
208 | DES_cblock *deskey = (DES_cblock *)key; |
209 | EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_get_cipher_data(ctx); |
210 | |
211 | dat->stream.cbc = NULL; |
212 | # if defined(SPARC_DES_CAPABLE) |
213 | if (SPARC_DES_CAPABLE) { |
214 | int mode = EVP_CIPHER_CTX_mode(ctx); |
215 | |
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; |
219 | return 1; |
220 | } |
221 | } |
222 | # endif |
223 | DES_set_key_unchecked(deskey, EVP_CIPHER_CTX_get_cipher_data(ctx)); |
224 | return 1; |
225 | } |
226 | |
227 | static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
228 | { |
229 | |
230 | switch (type) { |
231 | case EVP_CTRL_RAND_KEY: |
232 | if (RAND_priv_bytes(ptr, 8) <= 0) |
233 | return 0; |
234 | DES_set_odd_parity((DES_cblock *)ptr); |
235 | return 1; |
236 | |
237 | default: |
238 | return -1; |
239 | } |
240 | } |
241 | |
242 | #endif |
243 | |