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source: vbox/trunk/src/libs/openssl-3.0.1/providers/implementations/ciphers/cipher_rc5.c@ 94320

Last change on this file since 94320 was 94320, checked in by vboxsync, 3 years ago

libs/openssl-3.0.1: Export to OSE and fix copyright headers in Makefiles, bugref:10128
File size: 7.9 KB
Line 
1/*
2 * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
10/* Dispatch functions for RC5 cipher modes ecb, cbc, ofb, cfb */
11
12/*
13 * RC5 low level APIs are deprecated for public use, but still ok for internal
14 * use.
15 */
16#include "internal/deprecated.h"
17
18#include <openssl/proverr.h>
19#include "cipher_rc5.h"
20#include "prov/implementations.h"
21#include "prov/providercommon.h"
22
23#define RC5_FLAGS PROV_CIPHER_FLAG_VARIABLE_LENGTH
24
25static OSSL_FUNC_cipher_encrypt_init_fn rc5_einit;
26static OSSL_FUNC_cipher_decrypt_init_fn rc5_dinit;
27static OSSL_FUNC_cipher_freectx_fn rc5_freectx;
28static OSSL_FUNC_cipher_dupctx_fn rc5_dupctx;
29OSSL_FUNC_cipher_gettable_ctx_params_fn rc5_gettable_ctx_params;
30OSSL_FUNC_cipher_settable_ctx_params_fn rc5_settable_ctx_params;
31static OSSL_FUNC_cipher_set_ctx_params_fn rc5_set_ctx_params;
32
33static void rc5_freectx(void *vctx)
34{
35 PROV_RC5_CTX *ctx = (PROV_RC5_CTX *)vctx;
36
37 ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
38 OPENSSL_clear_free(ctx, sizeof(*ctx));
39}
40
41static void *rc5_dupctx(void *ctx)
42{
43 PROV_RC5_CTX *in = (PROV_RC5_CTX *)ctx;
44 PROV_RC5_CTX *ret;
45
46 if (!ossl_prov_is_running())
47 return NULL;
48
49 ret = OPENSSL_malloc(sizeof(*ret));
50 if (ret == NULL) {
51 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
52 return NULL;
53 }
54 *ret = *in;
55
56 return ret;
57}
58
59static int rc5_einit(void *ctx, const unsigned char *key, size_t keylen,
60 const unsigned char *iv, size_t ivlen,
61 const OSSL_PARAM params[])
62{
63 if (!ossl_cipher_generic_einit(ctx, key, keylen, iv, ivlen, NULL))
64 return 0;
65 return rc5_set_ctx_params(ctx, params);
66}
67
68static int rc5_dinit(void *ctx, const unsigned char *key, size_t keylen,
69 const unsigned char *iv, size_t ivlen,
70 const OSSL_PARAM params[])
71{
72 if (!ossl_cipher_generic_dinit(ctx, key, keylen, iv, ivlen, NULL))
73 return 0;
74 return rc5_set_ctx_params(ctx, params);
75}
76
77static int rc5_set_ctx_params(void *vctx, const OSSL_PARAM params[])
78{
79 PROV_RC5_CTX *ctx = (PROV_RC5_CTX *)vctx;
80 const OSSL_PARAM *p;
81
82 if (params == NULL)
83 return 1;
84
85 if (!ossl_cipher_var_keylen_set_ctx_params(vctx, params))
86 return 0;
87
88 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_ROUNDS);
89 if (p != NULL) {
90 unsigned int rounds;
91
92 if (!OSSL_PARAM_get_uint(p, &rounds)) {
93 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
94 return 0;
95 }
96 if (rounds != RC5_8_ROUNDS
97 && rounds != RC5_12_ROUNDS
98 && rounds != RC5_16_ROUNDS) {
99 ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_NUMBER_OF_ROUNDS);
100 return 0;
101 }
102 ctx->rounds = rounds;
103 }
104 return 1;
105}
106
107CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(rc5)
108 OSSL_PARAM_uint(OSSL_CIPHER_PARAM_ROUNDS, NULL),
109CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(rc5)
110
111CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(rc5)
112 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
113 OSSL_PARAM_uint(OSSL_CIPHER_PARAM_ROUNDS, NULL),
114CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(rc5)
115
116
117static int rc5_get_ctx_params(void *vctx, OSSL_PARAM params[])
118{
119 PROV_RC5_CTX *ctx = (PROV_RC5_CTX *)vctx;
120 OSSL_PARAM *p;
121
122 if (!ossl_cipher_generic_get_ctx_params(vctx, params))
123 return 0;
124 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ROUNDS);
125 if (p != NULL && !OSSL_PARAM_set_uint(p, ctx->rounds)) {
126 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
127 return 0;
128 }
129 return 1;
130}
131
132#define IMPLEMENT_cipher(alg, UCALG, lcmode, UCMODE, flags, kbits, \
133 blkbits, ivbits, typ) \
134static OSSL_FUNC_cipher_get_params_fn alg##_##kbits##_##lcmode##_get_params; \
135static int alg##_##kbits##_##lcmode##_get_params(OSSL_PARAM params[]) \
136{ \
137 return ossl_cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, \
138 flags, kbits, blkbits, ivbits); \
139} \
140static OSSL_FUNC_cipher_newctx_fn alg##_##kbits##_##lcmode##_newctx; \
141static void * alg##_##kbits##_##lcmode##_newctx(void *provctx) \
142{ \
143 PROV_##UCALG##_CTX *ctx; \
144 if (!ossl_prov_is_running()) \
145 return NULL; \
146 ctx = OPENSSL_zalloc(sizeof(*ctx)); \
147 if (ctx != NULL) { \
148 ossl_cipher_generic_initkey(ctx, kbits, blkbits, ivbits, \
149 EVP_CIPH_##UCMODE##_MODE, flags, \
150 ossl_prov_cipher_hw_##alg##_##lcmode(kbits),\
151 NULL); \
152 ctx->rounds = RC5_12_ROUNDS; \
153 } \
154 return ctx; \
155} \
156const OSSL_DISPATCH ossl_##alg##kbits##lcmode##_functions[] = { \
157 { OSSL_FUNC_CIPHER_NEWCTX, \
158 (void (*)(void)) alg##_##kbits##_##lcmode##_newctx }, \
159 { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx }, \
160 { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx }, \
161 { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))rc5_einit }, \
162 { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))rc5_dinit }, \
163 { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))ossl_cipher_generic_##typ##_update },\
164 { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))ossl_cipher_generic_##typ##_final }, \
165 { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))ossl_cipher_generic_cipher }, \
166 { OSSL_FUNC_CIPHER_GET_PARAMS, \
167 (void (*)(void)) alg##_##kbits##_##lcmode##_get_params }, \
168 { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \
169 (void (*)(void))ossl_cipher_generic_gettable_params }, \
170 { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \
171 (void (*)(void))rc5_get_ctx_params }, \
172 { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \
173 (void (*)(void))rc5_gettable_ctx_params }, \
174 { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \
175 (void (*)(void))rc5_set_ctx_params }, \
176 { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \
177 (void (*)(void))rc5_settable_ctx_params }, \
178 { 0, NULL } \
179};
180
181/* ossl_rc5128ecb_functions */
182IMPLEMENT_cipher(rc5, RC5, ecb, ECB, RC5_FLAGS, 128, 64, 0, block)
183/* ossl_rc5128cbc_functions */
184IMPLEMENT_cipher(rc5, RC5, cbc, CBC, RC5_FLAGS, 128, 64, 64, block)
185/* ossl_rc5128ofb64_functions */
186IMPLEMENT_cipher(rc5, RC5, ofb64, OFB, RC5_FLAGS, 128, 8, 64, stream)
187/* ossl_rc5128cfb64_functions */
188IMPLEMENT_cipher(rc5, RC5, cfb64, CFB, RC5_FLAGS, 128, 8, 64, stream)
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