2 * Copyright 2019-2023 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
10 /* Dispatch functions for RC2 cipher modes ecb, cbc, ofb, cfb */
13 * RC2 low level APIs are deprecated for public use, but still ok for internal
16 #include "internal/deprecated.h"
18 #include <openssl/proverr.h>
19 #include "cipher_rc2.h"
20 #include "prov/implementations.h"
21 #include "prov/providercommon.h"
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
28 static OSSL_FUNC_cipher_encrypt_init_fn rc2_einit;
29 static OSSL_FUNC_cipher_decrypt_init_fn rc2_dinit;
30 static OSSL_FUNC_cipher_freectx_fn rc2_freectx;
31 static OSSL_FUNC_cipher_dupctx_fn rc2_dupctx;
32 static OSSL_FUNC_cipher_gettable_ctx_params_fn rc2_gettable_ctx_params;
33 static OSSL_FUNC_cipher_settable_ctx_params_fn rc2_settable_ctx_params;
34 static OSSL_FUNC_cipher_set_ctx_params_fn rc2_set_ctx_params;
36 static void rc2_freectx(void *vctx)
38 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
40 ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
41 OPENSSL_clear_free(ctx, sizeof(*ctx));
44 static void *rc2_dupctx(void *ctx)
46 PROV_RC2_CTX *in = (PROV_RC2_CTX *)ctx;
49 if (!ossl_prov_is_running())
52 ret = OPENSSL_malloc(sizeof(*ret));
60 static int rc2_keybits_to_magic(int keybits)
70 ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE);
74 static int rc2_magic_to_keybits(int magic)
84 ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE);
88 static int rc2_einit(void *ctx, const unsigned char *key, size_t keylen,
89 const unsigned char *iv, size_t ivlen,
90 const OSSL_PARAM params[])
92 if (!ossl_cipher_generic_einit(ctx, key, keylen, iv, ivlen, NULL))
94 return rc2_set_ctx_params(ctx, params);
97 static int rc2_dinit(void *ctx, const unsigned char *key, size_t keylen,
98 const unsigned char *iv, size_t ivlen,
99 const OSSL_PARAM params[])
101 if (!ossl_cipher_generic_dinit(ctx, key, keylen, iv, ivlen, NULL))
103 return rc2_set_ctx_params(ctx, params);
106 static int rc2_get_ctx_params(void *vctx, OSSL_PARAM params[])
108 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
111 if (!ossl_cipher_generic_get_ctx_params(vctx, params))
113 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RC2_KEYBITS);
114 if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->key_bits)) {
115 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
118 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS);
123 unsigned char *d = p->data;
124 unsigned char **dd = d == NULL ? NULL : &d;
126 if (p->data_type != OSSL_PARAM_OCTET_STRING) {
127 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
130 if ((type = ASN1_TYPE_new()) == NULL) {
131 ERR_raise(ERR_LIB_PROV, ERR_R_ASN1_LIB);
135 /* Is this the original IV or the running IV? */
136 num = rc2_keybits_to_magic(ctx->key_bits);
137 if (!ASN1_TYPE_set_int_octetstring(type, num,
138 ctx->base.iv, ctx->base.ivlen)) {
139 ASN1_TYPE_free(type);
140 ERR_raise(ERR_LIB_PROV, ERR_R_ASN1_LIB);
144 * IF the caller has a buffer, we pray to the gods they got the
145 * size right. There's no way to tell the i2d functions...
147 i = i2d_ASN1_TYPE(type, dd);
149 p->return_size = (size_t)i;
151 ASN1_TYPE_free(type);
153 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
160 static int rc2_set_ctx_params(void *vctx, const OSSL_PARAM params[])
162 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
168 if (!ossl_cipher_var_keylen_set_ctx_params(vctx, params))
170 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_RC2_KEYBITS);
172 if (!OSSL_PARAM_get_size_t(p, &ctx->key_bits)) {
173 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
177 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS);
179 ASN1_TYPE *type = NULL;
181 const unsigned char *d = p->data;
183 unsigned char iv[16];
185 if (p->data_type != OSSL_PARAM_OCTET_STRING
186 || ctx->base.ivlen > sizeof(iv)
187 || (type = d2i_ASN1_TYPE(NULL, &d, p->data_size)) == NULL
188 || ((size_t)ASN1_TYPE_get_int_octetstring(type, &num, iv,
191 || !ossl_cipher_generic_initiv(&ctx->base, iv, ctx->base.ivlen)
192 || (ctx->key_bits = rc2_magic_to_keybits(num)) == 0) {
193 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
196 ASN1_TYPE_free(type);
200 * This code assumes that the caller will call
201 * EVP_CipherInit_ex() with a non NULL key in order to setup a key that
202 * uses the keylen and keybits that were set here.
204 ctx->base.keylen = ctx->key_bits / 8;
209 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(rc2)
210 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL),
211 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS, NULL, 0),
212 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(rc2)
214 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(rc2)
215 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
216 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL),
217 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS, NULL, 0),
218 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(rc2)
220 #define IMPLEMENT_cipher(alg, UCALG, lcmode, UCMODE, flags, kbits, blkbits, \
222 static OSSL_FUNC_cipher_get_params_fn alg##_##kbits##_##lcmode##_get_params; \
223 static int alg##_##kbits##_##lcmode##_get_params(OSSL_PARAM params[]) \
225 return ossl_cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, \
226 flags, kbits, blkbits, ivbits); \
228 static OSSL_FUNC_cipher_newctx_fn alg##_##kbits##_##lcmode##_newctx; \
229 static void *alg##_##kbits##_##lcmode##_newctx(void *provctx) \
231 PROV_##UCALG##_CTX *ctx; \
232 if (!ossl_prov_is_running()) \
234 ctx = OPENSSL_zalloc(sizeof(*ctx)); \
236 ossl_cipher_generic_initkey(ctx, kbits, blkbits, ivbits, \
237 EVP_CIPH_##UCMODE##_MODE, flags, \
238 ossl_prov_cipher_hw_##alg##_##lcmode(kbits), \
240 ctx->key_bits = kbits; \
244 const OSSL_DISPATCH ossl_##alg##kbits##lcmode##_functions[] = { \
245 { OSSL_FUNC_CIPHER_NEWCTX, \
246 (void (*)(void)) alg##_##kbits##_##lcmode##_newctx }, \
247 { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx }, \
248 { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx }, \
249 { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))rc2_einit }, \
250 { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))rc2_dinit }, \
251 { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))ossl_cipher_generic_##typ##_update },\
252 { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))ossl_cipher_generic_##typ##_final }, \
253 { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))ossl_cipher_generic_cipher }, \
254 { OSSL_FUNC_CIPHER_GET_PARAMS, \
255 (void (*)(void)) alg##_##kbits##_##lcmode##_get_params }, \
256 { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \
257 (void (*)(void))ossl_cipher_generic_gettable_params }, \
258 { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \
259 (void (*)(void))rc2_get_ctx_params }, \
260 { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \
261 (void (*)(void))rc2_gettable_ctx_params }, \
262 { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \
263 (void (*)(void))rc2_set_ctx_params }, \
264 { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \
265 (void (*)(void))rc2_settable_ctx_params }, \
269 /* ossl_rc2128ecb_functions */
270 IMPLEMENT_cipher(rc2, RC2, ecb, ECB, RC2_FLAGS, 128, 64, 0, block)
271 /* ossl_rc2128cbc_functions */
272 IMPLEMENT_cipher(rc2, RC2, cbc, CBC, RC2_FLAGS, 128, 64, 64, block)
273 /* ossl_rc240cbc_functions */
274 IMPLEMENT_cipher(rc2, RC2, cbc, CBC, RC2_FLAGS, 40, 64, 64, block)
275 /* ossl_rc264cbc_functions */
276 IMPLEMENT_cipher(rc2, RC2, cbc, CBC, RC2_FLAGS, 64, 64, 64, block)
278 /* ossl_rc2128ofb128_functions */
279 IMPLEMENT_cipher(rc2, RC2, ofb128, OFB, RC2_FLAGS, 128, 8, 64, stream)
280 /* ossl_rc2128cfb128_functions */
281 IMPLEMENT_cipher(rc2, RC2, cfb128, CFB, RC2_FLAGS, 128, 8, 64, stream)