VirtualBox

source: vbox/trunk/src/libs/openssl-3.1.7/providers/implementations/ciphers/cipher_rc2.c@ 106165

最後變更 在這個檔案從106165是 104078,由 vboxsync 提交於 8 月 前

openssl-3.1.5: Applied and adjusted our OpenSSL changes to 3.1.4. bugref:10638
檔案大小: 11.1 KB
行 
1/*
2 * Copyright 2019-2021 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/* Dispatch functions for RC2 cipher modes ecb, cbc, ofb, cfb */
11
12/*
13 * RC2 low level APIs are deprecated for public use, but still ok for internal
14 * use.
15 */
16#include "internal/deprecated.h"
17
18#include <openssl/proverr.h>
19#include "cipher_rc2.h"
20#include "prov/implementations.h"
21#include "prov/providercommon.h"
22
23#define RC2_40_MAGIC 0xa0
24#define RC2_64_MAGIC 0x78
25#define RC2_128_MAGIC 0x3a
26#define RC2_FLAGS PROV_CIPHER_FLAG_VARIABLE_LENGTH
27
28static OSSL_FUNC_cipher_encrypt_init_fn rc2_einit;
29static OSSL_FUNC_cipher_decrypt_init_fn rc2_dinit;
30static OSSL_FUNC_cipher_freectx_fn rc2_freectx;
31static OSSL_FUNC_cipher_dupctx_fn rc2_dupctx;
32static OSSL_FUNC_cipher_gettable_ctx_params_fn rc2_gettable_ctx_params;
33static OSSL_FUNC_cipher_settable_ctx_params_fn rc2_settable_ctx_params;
34static OSSL_FUNC_cipher_set_ctx_params_fn rc2_set_ctx_params;
35
36static void rc2_freectx(void *vctx)
37{
38 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
39
40 ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
41 OPENSSL_clear_free(ctx, sizeof(*ctx));
42}
43
44static void *rc2_dupctx(void *ctx)
45{
46 PROV_RC2_CTX *in = (PROV_RC2_CTX *)ctx;
47 PROV_RC2_CTX *ret;
48
49 if (!ossl_prov_is_running())
50 return NULL;
51
52 ret = OPENSSL_malloc(sizeof(*ret));
53 if (ret == NULL) {
54 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
55 return NULL;
56 }
57 *ret = *in;
58
59 return ret;
60}
61
62static int rc2_keybits_to_magic(int keybits)
63{
64 switch (keybits) {
65 case 128:
66 return RC2_128_MAGIC;
67 case 64:
68 return RC2_64_MAGIC;
69 case 40:
70 return RC2_40_MAGIC;
71 }
72 ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE);
73 return 0;
74}
75
76static int rc2_magic_to_keybits(int magic)
77{
78 switch (magic) {
79 case RC2_128_MAGIC:
80 return 128;
81 case RC2_64_MAGIC:
82 return 64;
83 case RC2_40_MAGIC:
84 return 40;
85 }
86 ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE);
87 return 0;
88}
89
90static int rc2_einit(void *ctx, const unsigned char *key, size_t keylen,
91 const unsigned char *iv, size_t ivlen,
92 const OSSL_PARAM params[])
93{
94 if (!ossl_cipher_generic_einit(ctx, key, keylen, iv, ivlen, NULL))
95 return 0;
96 return rc2_set_ctx_params(ctx, params);
97}
98
99static int rc2_dinit(void *ctx, const unsigned char *key, size_t keylen,
100 const unsigned char *iv, size_t ivlen,
101 const OSSL_PARAM params[])
102{
103 if (!ossl_cipher_generic_dinit(ctx, key, keylen, iv, ivlen, NULL))
104 return 0;
105 return rc2_set_ctx_params(ctx, params);
106}
107
108static int rc2_get_ctx_params(void *vctx, OSSL_PARAM params[])
109{
110 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
111 OSSL_PARAM *p;
112
113 if (!ossl_cipher_generic_get_ctx_params(vctx, params))
114 return 0;
115 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RC2_KEYBITS);
116 if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->key_bits)) {
117 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
118 return 0;
119 }
120 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS);
121 if (p != NULL) {
122 long num;
123 int i;
124 ASN1_TYPE *type;
125 unsigned char *d = p->data;
126 unsigned char **dd = d == NULL ? NULL : &d;
127
128 if (p->data_type != OSSL_PARAM_OCTET_STRING) {
129 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
130 return 0;
131 }
132 if ((type = ASN1_TYPE_new()) == NULL) {
133 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
134 return 0;
135 }
136
137 /* Is this the original IV or the running IV? */
138 num = rc2_keybits_to_magic(ctx->key_bits);
139 if (!ASN1_TYPE_set_int_octetstring(type, num,
140 ctx->base.iv, ctx->base.ivlen)) {
141 ASN1_TYPE_free(type);
142 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
143 return 0;
144 }
145 /*
146 * IF the caller has a buffer, we pray to the gods they got the
147 * size right. There's no way to tell the i2d functions...
148 */
149 i = i2d_ASN1_TYPE(type, dd);
150 if (i >= 0)
151 p->return_size = (size_t)i;
152
153 ASN1_TYPE_free(type);
154 if (i < 0) {
155 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
156 return 0;
157 }
158 }
159 return 1;
160}
161
162static int rc2_set_ctx_params(void *vctx, const OSSL_PARAM params[])
163{
164 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
165 const OSSL_PARAM *p;
166
167 if (params == NULL)
168 return 1;
169
170 if (!ossl_cipher_var_keylen_set_ctx_params(vctx, params))
171 return 0;
172 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_RC2_KEYBITS);
173 if (p != NULL) {
174 if (!OSSL_PARAM_get_size_t(p, &ctx->key_bits)) {
175 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
176 return 0;
177 }
178 }
179 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS);
180 if (p != NULL) {
181 ASN1_TYPE *type = NULL;
182 long num = 0;
183 const unsigned char *d = p->data;
184 int ret = 1;
185 unsigned char iv[16];
186
187 if (p->data_type != OSSL_PARAM_OCTET_STRING
188 || ctx->base.ivlen > sizeof(iv)
189 || (type = d2i_ASN1_TYPE(NULL, &d, p->data_size)) == NULL
190 || ((size_t)ASN1_TYPE_get_int_octetstring(type, &num, iv,
191 ctx->base.ivlen)
192 != ctx->base.ivlen)
193 || !ossl_cipher_generic_initiv(&ctx->base, iv, ctx->base.ivlen)
194 || (ctx->key_bits = rc2_magic_to_keybits(num)) == 0) {
195 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
196 ret = 0;
197 }
198 ASN1_TYPE_free(type);
199 if (ret == 0)
200 return 0;
201 /*
202 * This code assumes that the caller will call
203 * EVP_CipherInit_ex() with a non NULL key in order to setup a key that
204 * uses the keylen and keybits that were set here.
205 */
206 ctx->base.keylen = ctx->key_bits / 8;
207 }
208 return 1;
209}
210
211CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(rc2)
212OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL),
213OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS, NULL, 0),
214CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(rc2)
215
216CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(rc2)
217OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
218OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL),
219OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS, NULL, 0),
220CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(rc2)
221
222#define IMPLEMENT_cipher(alg, UCALG, lcmode, UCMODE, flags, kbits, blkbits, \
223 ivbits, typ) \
224static OSSL_FUNC_cipher_get_params_fn alg##_##kbits##_##lcmode##_get_params; \
225static int alg##_##kbits##_##lcmode##_get_params(OSSL_PARAM params[]) \
226{ \
227 return ossl_cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, \
228 flags, kbits, blkbits, ivbits); \
229} \
230static OSSL_FUNC_cipher_newctx_fn alg##_##kbits##_##lcmode##_newctx; \
231static void * alg##_##kbits##_##lcmode##_newctx(void *provctx) \
232{ \
233 PROV_##UCALG##_CTX *ctx; \
234 if (!ossl_prov_is_running()) \
235 return NULL; \
236 ctx = OPENSSL_zalloc(sizeof(*ctx)); \
237 if (ctx != NULL) { \
238 ossl_cipher_generic_initkey(ctx, kbits, blkbits, ivbits, \
239 EVP_CIPH_##UCMODE##_MODE, flags, \
240 ossl_prov_cipher_hw_##alg##_##lcmode(kbits), \
241 NULL); \
242 ctx->key_bits = kbits; \
243 } \
244 return ctx; \
245} \
246const OSSL_DISPATCH ossl_##alg##kbits##lcmode##_functions[] = { \
247 { OSSL_FUNC_CIPHER_NEWCTX, \
248 (void (*)(void)) alg##_##kbits##_##lcmode##_newctx }, \
249 { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx }, \
250 { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx }, \
251 { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))rc2_einit }, \
252 { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))rc2_dinit }, \
253 { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))ossl_cipher_generic_##typ##_update },\
254 { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))ossl_cipher_generic_##typ##_final }, \
255 { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))ossl_cipher_generic_cipher }, \
256 { OSSL_FUNC_CIPHER_GET_PARAMS, \
257 (void (*)(void)) alg##_##kbits##_##lcmode##_get_params }, \
258 { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \
259 (void (*)(void))ossl_cipher_generic_gettable_params }, \
260 { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \
261 (void (*)(void))rc2_get_ctx_params }, \
262 { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \
263 (void (*)(void))rc2_gettable_ctx_params }, \
264 { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \
265 (void (*)(void))rc2_set_ctx_params }, \
266 { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \
267 (void (*)(void))rc2_settable_ctx_params }, \
268 { 0, NULL } \
269};
270
271/* ossl_rc2128ecb_functions */
272IMPLEMENT_cipher(rc2, RC2, ecb, ECB, RC2_FLAGS, 128, 64, 0, block)
273/* ossl_rc2128cbc_functions */
274IMPLEMENT_cipher(rc2, RC2, cbc, CBC, RC2_FLAGS, 128, 64, 64, block)
275/* ossl_rc240cbc_functions */
276IMPLEMENT_cipher(rc2, RC2, cbc, CBC, RC2_FLAGS, 40, 64, 64, block)
277/* ossl_rc264cbc_functions */
278IMPLEMENT_cipher(rc2, RC2, cbc, CBC, RC2_FLAGS, 64, 64, 64, block)
279
280/* ossl_rc2128ofb128_functions */
281IMPLEMENT_cipher(rc2, RC2, ofb128, OFB, RC2_FLAGS, 128, 8, 64, stream)
282/* ossl_rc2128cfb128_functions */
283IMPLEMENT_cipher(rc2, RC2, cfb128, CFB, RC2_FLAGS, 128, 8, 64, stream)
注意: 瀏覽 TracBrowser 來幫助您使用儲存庫瀏覽器

© 2024 Oracle Support Privacy / Do Not Sell My Info Terms of Use Trademark Policy Automated Access Etiquette