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_FUNC_cipher_freectx_fn rc2_freectx;
27 static OSSL_FUNC_cipher_dupctx_fn rc2_dupctx;
28 static OSSL_FUNC_cipher_gettable_ctx_params_fn rc2_gettable_ctx_params;
29 static OSSL_FUNC_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 cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
36 OPENSSL_clear_free(ctx, sizeof(*ctx));
39 static void *rc2_dupctx(void *ctx)
41 PROV_RC2_CTX *in = (PROV_RC2_CTX *)ctx;
42 PROV_RC2_CTX *ret = OPENSSL_malloc(sizeof(*ret));
45 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
53 static int rc2_keybits_to_magic(int keybits)
63 ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE);
67 static int rc2_magic_to_keybits(int magic)
77 ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE);
81 static int rc2_get_ctx_params(void *vctx, OSSL_PARAM params[])
83 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
86 if (!cipher_generic_get_ctx_params(vctx, params))
88 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RC2_KEYBITS);
89 if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->key_bits)) {
90 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
93 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ALG_ID);
98 unsigned char *d = p->data;
99 unsigned char **dd = d == NULL ? NULL : &d;
101 if (p->data_type != OSSL_PARAM_OCTET_STRING) {
102 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
105 if ((type = ASN1_TYPE_new()) == NULL) {
106 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
110 /* Is this the original IV or the running IV? */
111 num = rc2_keybits_to_magic(ctx->key_bits);
112 if (!ASN1_TYPE_set_int_octetstring(type, num,
113 ctx->base.iv, ctx->base.ivlen)) {
114 ASN1_TYPE_free(type);
115 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
119 * IF the caller has a buffer, we pray to the gods they got the
120 * size right. There's no way to tell the i2d functions...
122 i = i2d_ASN1_TYPE(type, dd);
124 p->return_size = (size_t)i;
126 ASN1_TYPE_free(type);
128 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
135 static int rc2_set_ctx_params(void *vctx, OSSL_PARAM params[])
137 PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
140 if (!cipher_var_keylen_set_ctx_params(vctx, params))
142 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_RC2_KEYBITS);
144 if (!OSSL_PARAM_get_size_t(p, &ctx->key_bits)) {
145 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
149 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ALG_ID);
151 ASN1_TYPE *type = NULL;
153 const unsigned char *d = p->data;
155 unsigned char iv[16];
157 if (p->data_type != OSSL_PARAM_OCTET_STRING
158 || ctx->base.ivlen > sizeof(iv)
159 || (type = d2i_ASN1_TYPE(NULL, &d, p->data_size)) == NULL
160 || ((size_t)ASN1_TYPE_get_int_octetstring(type, &num, iv,
163 || !cipher_generic_initiv(&ctx->base, iv, ctx->base.ivlen)
164 || (ctx->key_bits = rc2_magic_to_keybits(num)) == 0) {
165 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
168 ASN1_TYPE_free(type);
172 * This code assumes that the caller will call
173 * EVP_CipherInit_ex() with a non NULL key in order to setup a key that
174 * uses the keylen and keybits that were set here.
176 ctx->base.keylen = ctx->key_bits / 8;
181 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(rc2)
182 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL),
183 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(rc2)
185 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(rc2)
186 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
187 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL),
188 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(rc2)
190 #define IMPLEMENT_cipher(alg, UCALG, lcmode, UCMODE, flags, kbits, blkbits, \
192 static OSSL_FUNC_cipher_get_params_fn alg##_##kbits##_##lcmode##_get_params; \
193 static int alg##_##kbits##_##lcmode##_get_params(OSSL_PARAM params[]) \
195 return cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, flags, \
196 kbits, blkbits, ivbits); \
198 static OSSL_FUNC_cipher_newctx_fn alg##_##kbits##_##lcmode##_newctx; \
199 static void * alg##_##kbits##_##lcmode##_newctx(void *provctx) \
201 PROV_##UCALG##_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx)); \
203 cipher_generic_initkey(ctx, kbits, blkbits, ivbits, \
204 EVP_CIPH_##UCMODE##_MODE, flags, \
205 PROV_CIPHER_HW_##alg##_##lcmode(kbits), NULL); \
206 ctx->key_bits = kbits; \
210 const OSSL_DISPATCH alg##kbits##lcmode##_functions[] = { \
211 { OSSL_FUNC_CIPHER_NEWCTX, \
212 (void (*)(void)) alg##_##kbits##_##lcmode##_newctx }, \
213 { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx }, \
214 { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx }, \
215 { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))cipher_generic_einit }, \
216 { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))cipher_generic_dinit }, \
217 { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))cipher_generic_##typ##_update },\
218 { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))cipher_generic_##typ##_final }, \
219 { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))cipher_generic_cipher }, \
220 { OSSL_FUNC_CIPHER_GET_PARAMS, \
221 (void (*)(void)) alg##_##kbits##_##lcmode##_get_params }, \
222 { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \
223 (void (*)(void))cipher_generic_gettable_params }, \
224 { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \
225 (void (*)(void))rc2_get_ctx_params }, \
226 { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \
227 (void (*)(void))rc2_gettable_ctx_params }, \
228 { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \
229 (void (*)(void))rc2_set_ctx_params }, \
230 { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \
231 (void (*)(void))rc2_settable_ctx_params }, \
235 /* rc2128ecb_functions */
236 IMPLEMENT_cipher(rc2, RC2, ecb, ECB, EVP_CIPH_VARIABLE_LENGTH, 128, 64, 0, block)
237 /* rc2128cbc_functions */
238 IMPLEMENT_cipher(rc2, RC2, cbc, CBC, EVP_CIPH_VARIABLE_LENGTH, 128, 64, 64, block)
239 /* rc240cbc_functions */
240 IMPLEMENT_cipher(rc2, RC2, cbc, CBC, EVP_CIPH_VARIABLE_LENGTH, 40, 64, 64, block)
241 /* rc264cbc_functions */
242 IMPLEMENT_cipher(rc2, RC2, cbc, CBC, EVP_CIPH_VARIABLE_LENGTH, 64, 64, 64, block)
244 /* rc2128ofb128_functions */
245 IMPLEMENT_cipher(rc2, RC2, ofb128, OFB, EVP_CIPH_VARIABLE_LENGTH, 128, 8, 64, stream)
246 /* rc2128cfb128_functions */
247 IMPLEMENT_cipher(rc2, RC2, cfb128, CFB, EVP_CIPH_VARIABLE_LENGTH, 128, 8, 64, stream)