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/providercommonerr.h"
22 #define RC2_40_MAGIC 0xa0
23 #define RC2_64_MAGIC 0x78
24 #define RC2_128_MAGIC 0x3a
26 static OSSL_OP_cipher_freectx_fn rc2_freectx;
27 static OSSL_OP_cipher_dupctx_fn rc2_dupctx;
28 static OSSL_OP_cipher_gettable_ctx_params_fn rc2_gettable_ctx_params;
29 static OSSL_OP_cipher_settable_ctx_params_fn rc2_settable_ctx_params;
31 static void rc2_freectx(void *vctx)
33 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
35 OPENSSL_clear_free(ctx, sizeof(*ctx));
38 static void *rc2_dupctx(void *ctx)
40 PROV_RC2_CTX *in = (PROV_RC2_CTX *)ctx;
41 PROV_RC2_CTX *ret = OPENSSL_malloc(sizeof(*ret));
44 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
52 static int rc2_keybits_to_magic(int keybits)
62 ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE);
66 static int rc2_magic_to_keybits(int magic)
76 ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE);
80 static int rc2_get_ctx_params(void *vctx, OSSL_PARAM params[])
82 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
85 if (!cipher_generic_get_ctx_params(vctx, params))
87 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RC2_KEYBITS);
88 if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->key_bits)) {
89 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
92 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ALG_ID);
97 unsigned char *d = p->data;
98 unsigned char **dd = d == NULL ? NULL : &d;
100 if (p->data_type != OSSL_PARAM_OCTET_STRING) {
101 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
104 if ((type = ASN1_TYPE_new()) == NULL) {
105 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
109 /* Is this the original IV or the running IV? */
110 num = rc2_keybits_to_magic(ctx->key_bits);
111 if (!ASN1_TYPE_set_int_octetstring(type, num,
112 ctx->base.iv, ctx->base.ivlen)) {
113 ASN1_TYPE_free(type);
114 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
118 * IF the caller has a buffer, we pray to the gods they got the
119 * size right. There's no way to tell the i2d functions...
121 i = i2d_ASN1_TYPE(type, dd);
123 p->return_size = (size_t)i;
125 ASN1_TYPE_free(type);
127 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
134 static int rc2_set_ctx_params(void *vctx, OSSL_PARAM params[])
136 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
139 if (!cipher_var_keylen_set_ctx_params(vctx, params))
141 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_RC2_KEYBITS);
143 if (!OSSL_PARAM_get_size_t(p, &ctx->key_bits)) {
144 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
148 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ALG_ID);
150 ASN1_TYPE *type = NULL;
152 const unsigned char *d = p->data;
154 unsigned char iv[16];
156 if (p->data_type != OSSL_PARAM_OCTET_STRING
157 || ctx->base.ivlen > sizeof(iv)
158 || (type = d2i_ASN1_TYPE(NULL, &d, p->data_size)) == NULL
159 || ((size_t)ASN1_TYPE_get_int_octetstring(type, &num, iv,
162 || !cipher_generic_initiv(&ctx->base, iv, ctx->base.ivlen)
163 || (ctx->key_bits = rc2_magic_to_keybits(num)) == 0) {
164 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
167 ASN1_TYPE_free(type);
171 * This code assumes that the caller will call
172 * EVP_CipherInit_ex() with a non NULL key in order to setup a key that
173 * uses the keylen and keybits that were set here.
175 ctx->base.keylen = ctx->key_bits / 8;
180 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(rc2)
181 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL),
182 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(rc2)
184 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(rc2)
185 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
186 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL),
187 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(rc2)
189 #define IMPLEMENT_cipher(alg, UCALG, lcmode, UCMODE, flags, kbits, blkbits, \
191 static OSSL_OP_cipher_get_params_fn alg##_##kbits##_##lcmode##_get_params; \
192 static int alg##_##kbits##_##lcmode##_get_params(OSSL_PARAM params[]) \
194 return cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, flags, \
195 kbits, blkbits, ivbits); \
197 static OSSL_OP_cipher_newctx_fn alg##_##kbits##_##lcmode##_newctx; \
198 static void * alg##_##kbits##_##lcmode##_newctx(void *provctx) \
200 PROV_##UCALG##_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx)); \
202 cipher_generic_initkey(ctx, kbits, blkbits, ivbits, \
203 EVP_CIPH_##UCMODE##_MODE, flags, \
204 PROV_CIPHER_HW_##alg##_##lcmode(kbits), NULL); \
205 ctx->key_bits = kbits; \
209 const OSSL_DISPATCH alg##kbits##lcmode##_functions[] = { \
210 { OSSL_FUNC_CIPHER_NEWCTX, \
211 (void (*)(void)) alg##_##kbits##_##lcmode##_newctx }, \
212 { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx }, \
213 { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx }, \
214 { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))cipher_generic_einit }, \
215 { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))cipher_generic_dinit }, \
216 { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))cipher_generic_##typ##_update },\
217 { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))cipher_generic_##typ##_final }, \
218 { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))cipher_generic_cipher }, \
219 { OSSL_FUNC_CIPHER_GET_PARAMS, \
220 (void (*)(void)) alg##_##kbits##_##lcmode##_get_params }, \
221 { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \
222 (void (*)(void))cipher_generic_gettable_params }, \
223 { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \
224 (void (*)(void))rc2_get_ctx_params }, \
225 { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \
226 (void (*)(void))rc2_gettable_ctx_params }, \
227 { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \
228 (void (*)(void))rc2_set_ctx_params }, \
229 { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \
230 (void (*)(void))rc2_settable_ctx_params }, \
234 /* rc2128ecb_functions */
235 IMPLEMENT_cipher(rc2, RC2, ecb, ECB, EVP_CIPH_VARIABLE_LENGTH, 128, 64, 0, block)
236 /* rc2128cbc_functions */
237 IMPLEMENT_cipher(rc2, RC2, cbc, CBC, EVP_CIPH_VARIABLE_LENGTH, 128, 64, 64, block)
238 /* rc240cbc_functions */
239 IMPLEMENT_cipher(rc2, RC2, cbc, CBC, EVP_CIPH_VARIABLE_LENGTH, 40, 64, 64, block)
240 /* rc264cbc_functions */
241 IMPLEMENT_cipher(rc2, RC2, cbc, CBC, EVP_CIPH_VARIABLE_LENGTH, 64, 64, 64, block)
243 /* rc2128ofb128_functions */
244 IMPLEMENT_cipher(rc2, RC2, ofb128, OFB, EVP_CIPH_VARIABLE_LENGTH, 128, 8, 64, stream)
245 /* rc2128cfb128_functions */
246 IMPLEMENT_cipher(rc2, RC2, cfb128, CFB, EVP_CIPH_VARIABLE_LENGTH, 128, 8, 64, stream)