1/*
2 * Copyright 2015-2021 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/*
11 * EVP _meth_ APIs are deprecated for public use, but still ok for
12 * internal use.
13 */
14#include "internal/deprecated.h"
15
16#include <string.h>
17
18#include <openssl/evp.h>
19#include "crypto/evp.h"
20#include "internal/provider.h"
21#include "evp_local.h"
22
23EVP_CIPHER *EVP_CIPHER_meth_new(int cipher_type, int block_size, int key_len)
24{
25    EVP_CIPHER *cipher = evp_cipher_new();
26
27    if (cipher != NULL) {
28        cipher->nid = cipher_type;
29        cipher->block_size = block_size;
30        cipher->key_len = key_len;
31        cipher->origin = EVP_ORIG_METH;
32    }
33    return cipher;
34}
35
36EVP_CIPHER *EVP_CIPHER_meth_dup(const EVP_CIPHER *cipher)
37{
38    EVP_CIPHER *to = NULL;
39
40    /*
41     * Non-legacy EVP_CIPHERs can't be duplicated like this.
42     * Use EVP_CIPHER_up_ref() instead.
43     */
44    if (cipher->prov != NULL)
45        return NULL;
46
47    if ((to = EVP_CIPHER_meth_new(cipher->nid, cipher->block_size,
48                                  cipher->key_len)) != NULL) {
49        CRYPTO_RWLOCK *lock = to->lock;
50
51        memcpy(to, cipher, sizeof(*to));
52        to->lock = lock;
53        to->origin = EVP_ORIG_METH;
54    }
55    return to;
56}
57
58void EVP_CIPHER_meth_free(EVP_CIPHER *cipher)
59{
60    if (cipher == NULL || cipher->origin != EVP_ORIG_METH)
61       return;
62
63    evp_cipher_free_int(cipher);
64}
65
66int EVP_CIPHER_meth_set_iv_length(EVP_CIPHER *cipher, int iv_len)
67{
68    if (cipher->iv_len != 0)
69        return 0;
70
71    cipher->iv_len = iv_len;
72    return 1;
73}
74
75int EVP_CIPHER_meth_set_flags(EVP_CIPHER *cipher, unsigned long flags)
76{
77    if (cipher->flags != 0)
78        return 0;
79
80    cipher->flags = flags;
81    return 1;
82}
83
84int EVP_CIPHER_meth_set_impl_ctx_size(EVP_CIPHER *cipher, int ctx_size)
85{
86    if (cipher->ctx_size != 0)
87        return 0;
88
89    cipher->ctx_size = ctx_size;
90    return 1;
91}
92
93int EVP_CIPHER_meth_set_init(EVP_CIPHER *cipher,
94                             int (*init) (EVP_CIPHER_CTX *ctx,
95                                          const unsigned char *key,
96                                          const unsigned char *iv,
97                                          int enc))
98{
99    if (cipher->init != NULL)
100        return 0;
101
102    cipher->init = init;
103    return 1;
104}
105
106int EVP_CIPHER_meth_set_do_cipher(EVP_CIPHER *cipher,
107                                  int (*do_cipher) (EVP_CIPHER_CTX *ctx,
108                                                    unsigned char *out,
109                                                    const unsigned char *in,
110                                                    size_t inl))
111{
112    if (cipher->do_cipher != NULL)
113        return 0;
114
115    cipher->do_cipher = do_cipher;
116    return 1;
117}
118
119int EVP_CIPHER_meth_set_cleanup(EVP_CIPHER *cipher,
120                                int (*cleanup) (EVP_CIPHER_CTX *))
121{
122    if (cipher->cleanup != NULL)
123        return 0;
124
125    cipher->cleanup = cleanup;
126    return 1;
127}
128
129int EVP_CIPHER_meth_set_set_asn1_params(EVP_CIPHER *cipher,
130                                        int (*set_asn1_parameters) (EVP_CIPHER_CTX *,
131                                                                    ASN1_TYPE *))
132{
133    if (cipher->set_asn1_parameters != NULL)
134        return 0;
135
136    cipher->set_asn1_parameters = set_asn1_parameters;
137    return 1;
138}
139
140int EVP_CIPHER_meth_set_get_asn1_params(EVP_CIPHER *cipher,
141                                        int (*get_asn1_parameters) (EVP_CIPHER_CTX *,
142                                                                    ASN1_TYPE *))
143{
144    if (cipher->get_asn1_parameters != NULL)
145        return 0;
146
147    cipher->get_asn1_parameters = get_asn1_parameters;
148    return 1;
149}
150
151int EVP_CIPHER_meth_set_ctrl(EVP_CIPHER *cipher,
152                             int (*ctrl) (EVP_CIPHER_CTX *, int type,
153                                          int arg, void *ptr))
154{
155    if (cipher->ctrl != NULL)
156        return 0;
157
158    cipher->ctrl = ctrl;
159    return 1;
160}
161
162
163int (*EVP_CIPHER_meth_get_init(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,
164                                                          const unsigned char *key,
165                                                          const unsigned char *iv,
166                                                          int enc)
167{
168    return cipher->init;
169}
170int (*EVP_CIPHER_meth_get_do_cipher(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,
171                                                               unsigned char *out,
172                                                               const unsigned char *in,
173                                                               size_t inl)
174{
175    return cipher->do_cipher;
176}
177
178int (*EVP_CIPHER_meth_get_cleanup(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *)
179{
180    return cipher->cleanup;
181}
182
183int (*EVP_CIPHER_meth_get_set_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
184                                                                     ASN1_TYPE *)
185{
186    return cipher->set_asn1_parameters;
187}
188
189int (*EVP_CIPHER_meth_get_get_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
190                                                               ASN1_TYPE *)
191{
192    return cipher->get_asn1_parameters;
193}
194
195int (*EVP_CIPHER_meth_get_ctrl(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
196                                                          int type, int arg,
197                                                          void *ptr)
198{
199    return cipher->ctrl;
200}
201
202