1 /*
2 * Copyright 2019-2023 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 /*
11 * DES low level APIs are deprecated for public use, but still ok for internal
12 * use.
13 */
14 #include "internal/deprecated.h"
15
16 #include <openssl/rand.h>
17 #include <openssl/proverr.h>
18 #include "prov/ciphercommon.h"
19 #include "cipher_des.h"
20 #include "prov/implementations.h"
21 #include "prov/providercommon.h"
22
23 #define DES_FLAGS PROV_CIPHER_FLAG_RAND_KEY
24
25 static OSSL_FUNC_cipher_freectx_fn des_freectx;
26 static OSSL_FUNC_cipher_encrypt_init_fn des_einit;
27 static OSSL_FUNC_cipher_decrypt_init_fn des_dinit;
28 static OSSL_FUNC_cipher_get_ctx_params_fn des_get_ctx_params;
29 static OSSL_FUNC_cipher_gettable_ctx_params_fn des_gettable_ctx_params;
30
des_newctx(void * provctx,size_t kbits,size_t blkbits,size_t ivbits,unsigned int mode,uint64_t flags,const PROV_CIPHER_HW * hw)31 static void *des_newctx(void *provctx, size_t kbits, size_t blkbits,
32 size_t ivbits, unsigned int mode, uint64_t flags,
33 const PROV_CIPHER_HW *hw)
34 {
35 PROV_DES_CTX *ctx;
36
37 if (!ossl_prov_is_running())
38 return NULL;
39
40 ctx = OPENSSL_zalloc(sizeof(*ctx));
41 if (ctx != NULL)
42 ossl_cipher_generic_initkey(ctx, kbits, blkbits, ivbits, mode, flags,
43 hw, provctx);
44 return ctx;
45 }
46
des_dupctx(void * ctx)47 static void *des_dupctx(void *ctx)
48 {
49 PROV_DES_CTX *in = (PROV_DES_CTX *)ctx;
50 PROV_DES_CTX *ret;
51
52 if (!ossl_prov_is_running())
53 return NULL;
54
55 ret = OPENSSL_malloc(sizeof(*ret));
56 if (ret == NULL)
57 return NULL;
58 in->base.hw->copyctx(&ret->base, &in->base);
59
60 return ret;
61 }
62
des_freectx(void * vctx)63 static void des_freectx(void *vctx)
64 {
65 PROV_DES_CTX *ctx = (PROV_DES_CTX *)vctx;
66
67 ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
68 OPENSSL_clear_free(ctx, sizeof(*ctx));
69 }
70
des_init(void * vctx,const unsigned char * key,size_t keylen,const unsigned char * iv,size_t ivlen,const OSSL_PARAM params[],int enc)71 static int des_init(void *vctx, const unsigned char *key, size_t keylen,
72 const unsigned char *iv, size_t ivlen,
73 const OSSL_PARAM params[], int enc)
74 {
75 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
76
77 if (!ossl_prov_is_running())
78 return 0;
79
80 ctx->num = 0;
81 ctx->bufsz = 0;
82 ctx->enc = enc;
83
84 if (iv != NULL) {
85 if (!ossl_cipher_generic_initiv(ctx, iv, ivlen))
86 return 0;
87 } else if (ctx->iv_set) {
88 /* reset IV to keep compatibility with 1.1.1 */
89 memcpy(ctx->iv, ctx->oiv, ctx->ivlen);
90 }
91
92 if (key != NULL) {
93 if (keylen != ctx->keylen) {
94 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
95 return 0;
96 }
97 if (!ctx->hw->init(ctx, key, keylen))
98 return 0;
99 ctx->key_set = 1;
100 }
101 return ossl_cipher_generic_set_ctx_params(ctx, params);
102 }
103
des_einit(void * vctx,const unsigned char * key,size_t keylen,const unsigned char * iv,size_t ivlen,const OSSL_PARAM params[])104 static int des_einit(void *vctx, const unsigned char *key, size_t keylen,
105 const unsigned char *iv, size_t ivlen,
106 const OSSL_PARAM params[])
107 {
108 return des_init(vctx, key, keylen, iv, ivlen, params, 1);
109 }
110
des_dinit(void * vctx,const unsigned char * key,size_t keylen,const unsigned char * iv,size_t ivlen,const OSSL_PARAM params[])111 static int des_dinit(void *vctx, const unsigned char *key, size_t keylen,
112 const unsigned char *iv, size_t ivlen,
113 const OSSL_PARAM params[])
114 {
115 return des_init(vctx, key, keylen, iv, ivlen, params, 0);
116 }
117
des_generatekey(PROV_CIPHER_CTX * ctx,void * ptr)118 static int des_generatekey(PROV_CIPHER_CTX *ctx, void *ptr)
119 {
120
121 DES_cblock *deskey = ptr;
122 size_t kl = ctx->keylen;
123
124 if (kl == 0 || RAND_priv_bytes_ex(ctx->libctx, ptr, kl, 0) <= 0)
125 return 0;
126 DES_set_odd_parity(deskey);
127 return 1;
128 }
129
130 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(des)
131 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, NULL, 0),
132 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(des)
133
134 static int des_get_ctx_params(void *vctx, OSSL_PARAM params[])
135 {
136 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
137 OSSL_PARAM *p;
138
139 if (!ossl_cipher_generic_get_ctx_params(vctx, params))
140 return 0;
141
142 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RANDOM_KEY);
143 if (p != NULL && !des_generatekey(ctx, p->data)) {
144 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GENERATE_KEY);
145 return 0;
146 }
147 return 1;
148 }
149
150 #define IMPLEMENT_des_cipher(type, lcmode, UCMODE, flags, \
151 kbits, blkbits, ivbits, block) \
152 static OSSL_FUNC_cipher_newctx_fn type##_##lcmode##_newctx; \
153 static void *des_##lcmode##_newctx(void *provctx) \
154 { \
155 return des_newctx(provctx, kbits, blkbits, ivbits, \
156 EVP_CIPH_##UCMODE##_MODE, flags, \
157 ossl_prov_cipher_hw_des_##lcmode()); \
158 } \
159 static OSSL_FUNC_cipher_get_params_fn des_##lcmode##_get_params; \
160 static int des_##lcmode##_get_params(OSSL_PARAM params[]) \
161 { \
162 return ossl_cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, \
163 flags, kbits, blkbits, ivbits); \
164 } \
165 const OSSL_DISPATCH ossl_##des_##lcmode##_functions[] = { \
166 { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))des_einit }, \
167 { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))des_dinit }, \
168 { OSSL_FUNC_CIPHER_UPDATE, \
169 (void (*)(void))ossl_cipher_generic_##block##_update }, \
170 { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))ossl_cipher_generic_##block##_final },\
171 { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))ossl_cipher_generic_cipher }, \
172 { OSSL_FUNC_CIPHER_NEWCTX, \
173 (void (*)(void))des_##lcmode##_newctx }, \
174 { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void))des_dupctx }, \
175 { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))des_freectx }, \
176 { OSSL_FUNC_CIPHER_GET_PARAMS, \
177 (void (*)(void))des_##lcmode##_get_params }, \
178 { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \
179 (void (*)(void))ossl_cipher_generic_gettable_params }, \
180 { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, (void (*)(void))des_get_ctx_params }, \
181 { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \
182 (void (*)(void))des_gettable_ctx_params }, \
183 { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \
184 (void (*)(void))ossl_cipher_generic_set_ctx_params }, \
185 { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \
186 (void (*)(void))ossl_cipher_generic_settable_ctx_params }, \
187 OSSL_DISPATCH_END \
188 }
189
190 /* ossl_des_ecb_functions */
191 IMPLEMENT_des_cipher(des, ecb, ECB, DES_FLAGS, 64, 64, 0, block);
192 /* ossl_des_cbc_functions */
193 IMPLEMENT_des_cipher(des, cbc, CBC, DES_FLAGS, 64, 64, 64, block);
194 /* ossl_des_ofb64_functions */
195 IMPLEMENT_des_cipher(des, ofb64, OFB, DES_FLAGS, 64, 8, 64, stream);
196 /* ossl_des_cfb64_functions */
197 IMPLEMENT_des_cipher(des, cfb64, CFB, DES_FLAGS, 64, 8, 64, stream);
198 /* ossl_des_cfb1_functions */
199 IMPLEMENT_des_cipher(des, cfb1, CFB, DES_FLAGS, 64, 8, 64, stream);
200 /* ossl_des_cfb8_functions */
201 IMPLEMENT_des_cipher(des, cfb8, CFB, DES_FLAGS, 64, 8, 64, stream);
202
