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1 | /* |
2 | * Copyright 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 | ||
604e884b | 10 | #include "prov/ciphercommon.h" |
e3f3ee44 | 11 | #include "cipher_des.h" |
25f2138b | 12 | #include "crypto/rand.h" |
af3e7e1b | 13 | #include "prov/implementations.h" |
ddd21319 | 14 | #include "prov/providercommonerr.h" |
e3f3ee44 SL |
15 | |
16 | /* TODO(3.0) Figure out what flags need to be here */ | |
17 | #define DES_FLAGS (EVP_CIPH_RAND_KEY) | |
18 | ||
19 | static OSSL_OP_cipher_freectx_fn des_freectx; | |
20 | static OSSL_OP_cipher_encrypt_init_fn des_einit; | |
21 | static OSSL_OP_cipher_decrypt_init_fn des_dinit; | |
22 | static OSSL_OP_cipher_get_ctx_params_fn des_get_ctx_params; | |
23 | static OSSL_OP_cipher_gettable_ctx_params_fn des_gettable_ctx_params; | |
24 | ||
25 | static void *des_newctx(void *provctx, size_t kbits, size_t blkbits, | |
26 | size_t ivbits, unsigned int mode, uint64_t flags, | |
27 | const PROV_CIPHER_HW *hw) | |
28 | { | |
29 | PROV_DES_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx)); | |
30 | ||
31 | if (ctx != NULL) | |
32 | cipher_generic_initkey(ctx, kbits, blkbits, ivbits, mode, flags, hw, | |
33 | provctx); | |
34 | return ctx; | |
35 | } | |
36 | ||
37 | static void des_freectx(void *vctx) | |
38 | { | |
089cb623 | 39 | PROV_DES_CTX *ctx = (PROV_DES_CTX *)vctx; |
e3f3ee44 SL |
40 | |
41 | OPENSSL_clear_free(ctx, sizeof(*ctx)); | |
42 | } | |
43 | ||
44 | static int des_init(void *vctx, const unsigned char *key, size_t keylen, | |
45 | const unsigned char *iv, size_t ivlen, int enc) | |
46 | { | |
47 | PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx; | |
48 | ||
49 | ctx->enc = enc; | |
50 | ||
51 | if (iv != NULL) { | |
089cb623 | 52 | if (!cipher_generic_initiv(ctx, iv, ivlen)) |
e3f3ee44 | 53 | return 0; |
e3f3ee44 SL |
54 | } |
55 | ||
56 | if (key != NULL) { | |
57 | if (keylen != ctx->keylen) { | |
58 | ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEYLEN); | |
59 | return 0; | |
60 | } | |
61 | return ctx->hw->init(ctx, key, keylen); | |
62 | } | |
63 | return 1; | |
64 | } | |
65 | ||
66 | static int des_einit(void *vctx, const unsigned char *key, size_t keylen, | |
67 | const unsigned char *iv, size_t ivlen) | |
68 | { | |
69 | return des_init(vctx, key, keylen, iv, ivlen, 1); | |
70 | } | |
71 | ||
72 | static int des_dinit(void *vctx, const unsigned char *key, size_t keylen, | |
73 | const unsigned char *iv, size_t ivlen) | |
74 | { | |
75 | return des_init(vctx, key, keylen, iv, ivlen, 0); | |
76 | } | |
77 | ||
78 | static int des_generatekey(PROV_CIPHER_CTX *ctx, void *ptr) | |
79 | { | |
80 | ||
81 | DES_cblock *deskey = ptr; | |
82 | size_t kl = ctx->keylen; | |
83 | ||
84 | if (kl == 0 || rand_priv_bytes_ex(ctx->libctx, ptr, kl) <= 0) | |
85 | return 0; | |
86 | DES_set_odd_parity(deskey); | |
87 | return 1; | |
88 | } | |
89 | ||
90 | CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(des) | |
91 | OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, NULL, 0), | |
92 | CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(des) | |
93 | ||
94 | static int des_get_ctx_params(void *vctx, OSSL_PARAM params[]) | |
95 | { | |
96 | PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx; | |
97 | OSSL_PARAM *p; | |
98 | ||
99 | if (!cipher_generic_get_ctx_params(vctx, params)) | |
100 | return 0; | |
101 | ||
102 | p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RANDOM_KEY); | |
103 | if (p != NULL && !des_generatekey(ctx, p->data)) { | |
104 | ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GENERATE_KEY); | |
105 | return 0; | |
106 | } | |
107 | return 1; | |
108 | } | |
109 | ||
110 | #define IMPLEMENT_des_cipher(type, lcmode, UCMODE, flags, \ | |
111 | kbits, blkbits, ivbits, block) \ | |
112 | static OSSL_OP_cipher_newctx_fn type##_##lcmode##_newctx; \ | |
113 | static void *des_##lcmode##_newctx(void *provctx) \ | |
114 | { \ | |
115 | return des_newctx(provctx, kbits, blkbits, ivbits, \ | |
116 | EVP_CIPH_##UCMODE##_MODE, flags, \ | |
117 | PROV_CIPHER_HW_des_##lcmode()); \ | |
118 | } \ | |
119 | static OSSL_OP_cipher_get_params_fn des_##lcmode##_get_params; \ | |
120 | static int des_##lcmode##_get_params(OSSL_PARAM params[]) \ | |
121 | { \ | |
122 | return cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, flags, \ | |
123 | kbits, blkbits, ivbits); \ | |
124 | } \ | |
125 | const OSSL_DISPATCH des_##lcmode##_functions[] = { \ | |
126 | { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))des_einit }, \ | |
127 | { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))des_dinit }, \ | |
128 | { OSSL_FUNC_CIPHER_UPDATE, \ | |
129 | (void (*)(void))cipher_generic_##block##_update }, \ | |
130 | { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))cipher_generic_##block##_final },\ | |
131 | { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))cipher_generic_cipher }, \ | |
132 | { OSSL_FUNC_CIPHER_NEWCTX, \ | |
133 | (void (*)(void))des_##lcmode##_newctx }, \ | |
134 | { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))des_freectx }, \ | |
135 | { OSSL_FUNC_CIPHER_GET_PARAMS, \ | |
136 | (void (*)(void))des_##lcmode##_get_params }, \ | |
137 | { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \ | |
138 | (void (*)(void))cipher_generic_gettable_params }, \ | |
139 | { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, (void (*)(void))des_get_ctx_params }, \ | |
140 | { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \ | |
141 | (void (*)(void))des_gettable_ctx_params }, \ | |
142 | { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \ | |
143 | (void (*)(void))cipher_generic_set_ctx_params }, \ | |
144 | { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \ | |
145 | (void (*)(void))cipher_generic_settable_ctx_params }, \ | |
146 | { 0, NULL } \ | |
147 | } | |
148 | ||
149 | /* des_ecb_functions */ | |
150 | IMPLEMENT_des_cipher(des, ecb, ECB, DES_FLAGS, 64, 64, 0, block); | |
151 | /* des_cbc_functions */ | |
152 | IMPLEMENT_des_cipher(des, cbc, CBC, DES_FLAGS, 64, 64, 64, block); | |
153 | /* des_ofb64_functions */ | |
154 | IMPLEMENT_des_cipher(des, ofb64, OFB, DES_FLAGS, 64, 8, 64, stream); | |
155 | /* des_cfb64_functions */ | |
156 | IMPLEMENT_des_cipher(des, cfb64, CFB, DES_FLAGS, 64, 8, 64, stream); | |
157 | /* des_cfb1_functions */ | |
158 | IMPLEMENT_des_cipher(des, cfb1, CFB, DES_FLAGS, 64, 8, 64, stream); | |
159 | /* des_cfb8_functions */ | |
160 | IMPLEMENT_des_cipher(des, cfb8, CFB, DES_FLAGS, 64, 8, 64, stream); |