2 * Copyright 2019-2020 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 "cipher_rc2.h"
19 #include "prov/implementations.h"
20 #include "prov/providercommon.h"
21 #include "prov/providercommonerr.h"
23 #define RC2_40_MAGIC 0xa0
24 #define RC2_64_MAGIC 0x78
25 #define RC2_128_MAGIC 0x3a
27 static OSSL_FUNC_cipher_freectx_fn rc2_freectx;
28 static OSSL_FUNC_cipher_dupctx_fn rc2_dupctx;
29 static OSSL_FUNC_cipher_gettable_ctx_params_fn rc2_gettable_ctx_params;
30 static OSSL_FUNC_cipher_settable_ctx_params_fn rc2_settable_ctx_params;
32 static void rc2_freectx(void *vctx)
34 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
36 ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
37 OPENSSL_clear_free(ctx, sizeof(*ctx));
40 static void *rc2_dupctx(void *ctx)
42 PROV_RC2_CTX *in = (PROV_RC2_CTX *)ctx;
45 if (!ossl_prov_is_running())
48 ret = OPENSSL_malloc(sizeof(*ret));
50 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
58 static int rc2_keybits_to_magic(int keybits)
68 ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE);
72 static int rc2_magic_to_keybits(int magic)
82 ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE);
86 static int rc2_get_ctx_params(void *vctx, OSSL_PARAM params[])
88 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
91 if (!ossl_cipher_generic_get_ctx_params(vctx, params))
93 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RC2_KEYBITS);
94 if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->key_bits)) {
95 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
98 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ALG_ID);
103 unsigned char *d = p->data;
104 unsigned char **dd = d == NULL ? NULL : &d;
106 if (p->data_type != OSSL_PARAM_OCTET_STRING) {
107 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
110 if ((type = ASN1_TYPE_new()) == NULL) {
111 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
115 /* Is this the original IV or the running IV? */
116 num = rc2_keybits_to_magic(ctx->key_bits);
117 if (!ASN1_TYPE_set_int_octetstring(type, num,
118 ctx->base.iv, ctx->base.ivlen)) {
119 ASN1_TYPE_free(type);
120 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
124 * IF the caller has a buffer, we pray to the gods they got the
125 * size right. There's no way to tell the i2d functions...
127 i = i2d_ASN1_TYPE(type, dd);
129 p->return_size = (size_t)i;
131 ASN1_TYPE_free(type);
133 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
140 static int rc2_set_ctx_params(void *vctx, OSSL_PARAM params[])
142 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
145 if (!ossl_cipher_var_keylen_set_ctx_params(vctx, params))
147 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_RC2_KEYBITS);
149 if (!OSSL_PARAM_get_size_t(p, &ctx->key_bits)) {
150 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
154 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ALG_ID);
156 ASN1_TYPE *type = NULL;
158 const unsigned char *d = p->data;
160 unsigned char iv[16];
162 if (p->data_type != OSSL_PARAM_OCTET_STRING
163 || ctx->base.ivlen > sizeof(iv)
164 || (type = d2i_ASN1_TYPE(NULL, &d, p->data_size)) == NULL
165 || ((size_t)ASN1_TYPE_get_int_octetstring(type, &num, iv,
168 || !ossl_cipher_generic_initiv(&ctx->base, iv, ctx->base.ivlen)
169 || (ctx->key_bits = rc2_magic_to_keybits(num)) == 0) {
170 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
173 ASN1_TYPE_free(type);
177 * This code assumes that the caller will call
178 * EVP_CipherInit_ex() with a non NULL key in order to setup a key that
179 * uses the keylen and keybits that were set here.
181 ctx->base.keylen = ctx->key_bits / 8;
186 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(rc2)
187 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL),
188 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(rc2)
190 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(rc2)
191 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
192 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL),
193 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(rc2)
195 #define IMPLEMENT_cipher(alg, UCALG, lcmode, UCMODE, flags, kbits, blkbits, \
197 static OSSL_FUNC_cipher_get_params_fn alg##_##kbits##_##lcmode##_get_params; \
198 static int alg##_##kbits##_##lcmode##_get_params(OSSL_PARAM params[]) \
200 return ossl_cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, \
201 flags, kbits, blkbits, ivbits); \
203 static OSSL_FUNC_cipher_newctx_fn alg##_##kbits##_##lcmode##_newctx; \
204 static void * alg##_##kbits##_##lcmode##_newctx(void *provctx) \
206 PROV_##UCALG##_CTX *ctx; \
207 if (!ossl_prov_is_running()) \
209 ctx = OPENSSL_zalloc(sizeof(*ctx)); \
211 ossl_cipher_generic_initkey(ctx, kbits, blkbits, ivbits, \
212 EVP_CIPH_##UCMODE##_MODE, flags, \
213 ossl_prov_cipher_hw_##alg##_##lcmode(kbits), \
215 ctx->key_bits = kbits; \
219 const OSSL_DISPATCH ossl_##alg##kbits##lcmode##_functions[] = { \
220 { OSSL_FUNC_CIPHER_NEWCTX, \
221 (void (*)(void)) alg##_##kbits##_##lcmode##_newctx }, \
222 { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx }, \
223 { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx }, \
224 { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))ossl_cipher_generic_einit }, \
225 { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))ossl_cipher_generic_dinit }, \
226 { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))ossl_cipher_generic_##typ##_update },\
227 { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))ossl_cipher_generic_##typ##_final }, \
228 { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))ossl_cipher_generic_cipher }, \
229 { OSSL_FUNC_CIPHER_GET_PARAMS, \
230 (void (*)(void)) alg##_##kbits##_##lcmode##_get_params }, \
231 { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \
232 (void (*)(void))ossl_cipher_generic_gettable_params }, \
233 { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \
234 (void (*)(void))rc2_get_ctx_params }, \
235 { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \
236 (void (*)(void))rc2_gettable_ctx_params }, \
237 { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \
238 (void (*)(void))rc2_set_ctx_params }, \
239 { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \
240 (void (*)(void))rc2_settable_ctx_params }, \
244 /* ossl_rc2128ecb_functions */
245 IMPLEMENT_cipher(rc2, RC2, ecb, ECB, EVP_CIPH_VARIABLE_LENGTH, 128, 64, 0, block)
246 /* ossl_rc2128cbc_functions */
247 IMPLEMENT_cipher(rc2, RC2, cbc, CBC, EVP_CIPH_VARIABLE_LENGTH, 128, 64, 64, block)
248 /* ossl_rc240cbc_functions */
249 IMPLEMENT_cipher(rc2, RC2, cbc, CBC, EVP_CIPH_VARIABLE_LENGTH, 40, 64, 64, block)
250 /* ossl_rc264cbc_functions */
251 IMPLEMENT_cipher(rc2, RC2, cbc, CBC, EVP_CIPH_VARIABLE_LENGTH, 64, 64, 64, block)
253 /* ossl_rc2128ofb128_functions */
254 IMPLEMENT_cipher(rc2, RC2, ofb128, OFB, EVP_CIPH_VARIABLE_LENGTH, 128, 8, 64, stream)
255 /* ossl_rc2128cfb128_functions */
256 IMPLEMENT_cipher(rc2, RC2, cfb128, CFB, EVP_CIPH_VARIABLE_LENGTH, 128, 8, 64, stream)