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 <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_freectx_fn rc2_freectx;
29 static OSSL_FUNC_cipher_dupctx_fn rc2_dupctx;
30 static OSSL_FUNC_cipher_gettable_ctx_params_fn rc2_gettable_ctx_params;
31 static OSSL_FUNC_cipher_settable_ctx_params_fn rc2_settable_ctx_params;
33 static void rc2_freectx(void *vctx)
35 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
37 ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
38 OPENSSL_clear_free(ctx, sizeof(*ctx));
41 static void *rc2_dupctx(void *ctx)
43 PROV_RC2_CTX *in = (PROV_RC2_CTX *)ctx;
46 if (!ossl_prov_is_running())
49 ret = OPENSSL_malloc(sizeof(*ret));
51 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
59 static int rc2_keybits_to_magic(int keybits)
69 ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE);
73 static int rc2_magic_to_keybits(int magic)
83 ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE);
87 static int rc2_get_ctx_params(void *vctx, OSSL_PARAM params[])
89 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
92 if (!ossl_cipher_generic_get_ctx_params(vctx, params))
94 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RC2_KEYBITS);
95 if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->key_bits)) {
96 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
99 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ALG_ID);
104 unsigned char *d = p->data;
105 unsigned char **dd = d == NULL ? NULL : &d;
107 if (p->data_type != OSSL_PARAM_OCTET_STRING) {
108 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
111 if ((type = ASN1_TYPE_new()) == NULL) {
112 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
116 /* Is this the original IV or the running IV? */
117 num = rc2_keybits_to_magic(ctx->key_bits);
118 if (!ASN1_TYPE_set_int_octetstring(type, num,
119 ctx->base.iv, ctx->base.ivlen)) {
120 ASN1_TYPE_free(type);
121 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
125 * IF the caller has a buffer, we pray to the gods they got the
126 * size right. There's no way to tell the i2d functions...
128 i = i2d_ASN1_TYPE(type, dd);
130 p->return_size = (size_t)i;
132 ASN1_TYPE_free(type);
134 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
141 static int rc2_set_ctx_params(void *vctx, OSSL_PARAM params[])
143 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
146 if (!ossl_cipher_var_keylen_set_ctx_params(vctx, params))
148 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_RC2_KEYBITS);
150 if (!OSSL_PARAM_get_size_t(p, &ctx->key_bits)) {
151 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
155 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ALG_ID);
157 ASN1_TYPE *type = NULL;
159 const unsigned char *d = p->data;
161 unsigned char iv[16];
163 if (p->data_type != OSSL_PARAM_OCTET_STRING
164 || ctx->base.ivlen > sizeof(iv)
165 || (type = d2i_ASN1_TYPE(NULL, &d, p->data_size)) == NULL
166 || ((size_t)ASN1_TYPE_get_int_octetstring(type, &num, iv,
169 || !ossl_cipher_generic_initiv(&ctx->base, iv, ctx->base.ivlen)
170 || (ctx->key_bits = rc2_magic_to_keybits(num)) == 0) {
171 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
174 ASN1_TYPE_free(type);
178 * This code assumes that the caller will call
179 * EVP_CipherInit_ex() with a non NULL key in order to setup a key that
180 * uses the keylen and keybits that were set here.
182 ctx->base.keylen = ctx->key_bits / 8;
187 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(rc2)
188 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL),
189 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(rc2)
191 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(rc2)
192 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
193 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL),
194 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(rc2)
196 #define IMPLEMENT_cipher(alg, UCALG, lcmode, UCMODE, flags, kbits, blkbits, \
198 static OSSL_FUNC_cipher_get_params_fn alg##_##kbits##_##lcmode##_get_params; \
199 static int alg##_##kbits##_##lcmode##_get_params(OSSL_PARAM params[]) \
201 return ossl_cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, \
202 flags, kbits, blkbits, ivbits); \
204 static OSSL_FUNC_cipher_newctx_fn alg##_##kbits##_##lcmode##_newctx; \
205 static void * alg##_##kbits##_##lcmode##_newctx(void *provctx) \
207 PROV_##UCALG##_CTX *ctx; \
208 if (!ossl_prov_is_running()) \
210 ctx = OPENSSL_zalloc(sizeof(*ctx)); \
212 ossl_cipher_generic_initkey(ctx, kbits, blkbits, ivbits, \
213 EVP_CIPH_##UCMODE##_MODE, flags, \
214 ossl_prov_cipher_hw_##alg##_##lcmode(kbits), \
216 ctx->key_bits = kbits; \
220 const OSSL_DISPATCH ossl_##alg##kbits##lcmode##_functions[] = { \
221 { OSSL_FUNC_CIPHER_NEWCTX, \
222 (void (*)(void)) alg##_##kbits##_##lcmode##_newctx }, \
223 { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx }, \
224 { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx }, \
225 { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))ossl_cipher_generic_einit }, \
226 { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))ossl_cipher_generic_dinit }, \
227 { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))ossl_cipher_generic_##typ##_update },\
228 { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))ossl_cipher_generic_##typ##_final }, \
229 { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))ossl_cipher_generic_cipher }, \
230 { OSSL_FUNC_CIPHER_GET_PARAMS, \
231 (void (*)(void)) alg##_##kbits##_##lcmode##_get_params }, \
232 { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \
233 (void (*)(void))ossl_cipher_generic_gettable_params }, \
234 { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \
235 (void (*)(void))rc2_get_ctx_params }, \
236 { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \
237 (void (*)(void))rc2_gettable_ctx_params }, \
238 { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \
239 (void (*)(void))rc2_set_ctx_params }, \
240 { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \
241 (void (*)(void))rc2_settable_ctx_params }, \
245 /* ossl_rc2128ecb_functions */
246 IMPLEMENT_cipher(rc2, RC2, ecb, ECB, RC2_FLAGS, 128, 64, 0, block)
247 /* ossl_rc2128cbc_functions */
248 IMPLEMENT_cipher(rc2, RC2, cbc, CBC, RC2_FLAGS, 128, 64, 64, block)
249 /* ossl_rc240cbc_functions */
250 IMPLEMENT_cipher(rc2, RC2, cbc, CBC, RC2_FLAGS, 40, 64, 64, block)
251 /* ossl_rc264cbc_functions */
252 IMPLEMENT_cipher(rc2, RC2, cbc, CBC, RC2_FLAGS, 64, 64, 64, block)
254 /* ossl_rc2128ofb128_functions */
255 IMPLEMENT_cipher(rc2, RC2, ofb128, OFB, RC2_FLAGS, 128, 8, 64, stream)
256 /* ossl_rc2128cfb128_functions */
257 IMPLEMENT_cipher(rc2, RC2, cfb128, CFB, RC2_FLAGS, 128, 8, 64, stream)