1 /* $OpenBSD: rsa_meth.c,v 1.5 2022/07/04 12:23:30 tb Exp $ */
2 /*
3 * Copyright (c) 2018 Theo Buehler <tb@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <stdlib.h>
19 #include <string.h>
20
21 #include <openssl/err.h>
22 #include <openssl/rsa.h>
23
24 #include "rsa_locl.h"
25
26 RSA_METHOD *
RSA_meth_new(const char * name,int flags)27 RSA_meth_new(const char *name, int flags)
28 {
29 RSA_METHOD *meth;
30
31 if ((meth = calloc(1, sizeof(*meth))) == NULL)
32 return NULL;
33 if ((meth->name = strdup(name)) == NULL) {
34 free(meth);
35 return NULL;
36 }
37 meth->flags = flags;
38
39 return meth;
40 }
41
42 void
RSA_meth_free(RSA_METHOD * meth)43 RSA_meth_free(RSA_METHOD *meth)
44 {
45 if (meth == NULL)
46 return;
47
48 free(meth->name);
49 free(meth);
50 }
51
52 RSA_METHOD *
RSA_meth_dup(const RSA_METHOD * meth)53 RSA_meth_dup(const RSA_METHOD *meth)
54 {
55 RSA_METHOD *copy;
56
57 if ((copy = calloc(1, sizeof(*copy))) == NULL)
58 return NULL;
59 memcpy(copy, meth, sizeof(*copy));
60 if ((copy->name = strdup(meth->name)) == NULL) {
61 free(copy);
62 return NULL;
63 }
64
65 return copy;
66 }
67
68 int
RSA_meth_set1_name(RSA_METHOD * meth,const char * name)69 RSA_meth_set1_name(RSA_METHOD *meth, const char *name)
70 {
71 char *new_name;
72
73 if ((new_name = strdup(name)) == NULL)
74 return 0;
75 free(meth->name);
76 meth->name = new_name;
77 return 1;
78 }
79
80 int
RSA_meth_get_finish(const RSA_METHOD * meth)81 (*RSA_meth_get_finish(const RSA_METHOD *meth))(RSA *rsa)
82 {
83 return meth->finish;
84 }
85
86 int
RSA_meth_set_priv_enc(RSA_METHOD * meth,int (* priv_enc)(int flen,const unsigned char * from,unsigned char * to,RSA * rsa,int padding))87 RSA_meth_set_priv_enc(RSA_METHOD *meth, int (*priv_enc)(int flen,
88 const unsigned char *from, unsigned char *to, RSA *rsa, int padding))
89 {
90 meth->rsa_priv_enc = priv_enc;
91 return 1;
92 }
93
94 int
RSA_meth_set_priv_dec(RSA_METHOD * meth,int (* priv_dec)(int flen,const unsigned char * from,unsigned char * to,RSA * rsa,int padding))95 RSA_meth_set_priv_dec(RSA_METHOD *meth, int (*priv_dec)(int flen,
96 const unsigned char *from, unsigned char *to, RSA *rsa, int padding))
97 {
98 meth->rsa_priv_dec = priv_dec;
99 return 1;
100 }
101
102 int
RSA_meth_set_finish(RSA_METHOD * meth,int (* finish)(RSA * rsa))103 RSA_meth_set_finish(RSA_METHOD *meth, int (*finish)(RSA *rsa))
104 {
105 meth->finish = finish;
106 return 1;
107 }
108
109 int
RSA_meth_set_pub_enc(RSA_METHOD * meth,int (* pub_enc)(int flen,const unsigned char * from,unsigned char * to,RSA * rsa,int padding))110 RSA_meth_set_pub_enc(RSA_METHOD *meth, int (*pub_enc)(int flen,
111 const unsigned char *from, unsigned char *to, RSA *rsa, int padding))
112 {
113 meth->rsa_pub_enc = pub_enc;
114 return 1;
115 }
116
117 int
RSA_meth_set_pub_dec(RSA_METHOD * meth,int (* pub_dec)(int flen,const unsigned char * from,unsigned char * to,RSA * rsa,int padding))118 RSA_meth_set_pub_dec(RSA_METHOD *meth, int (*pub_dec)(int flen,
119 const unsigned char *from, unsigned char *to, RSA *rsa, int padding))
120 {
121 meth->rsa_pub_dec = pub_dec;
122 return 1;
123 }
124
125 int
RSA_meth_set_mod_exp(RSA_METHOD * meth,int (* mod_exp)(BIGNUM * r0,const BIGNUM * i,RSA * rsa,BN_CTX * ctx))126 RSA_meth_set_mod_exp(RSA_METHOD *meth, int (*mod_exp)(BIGNUM *r0,
127 const BIGNUM *i, RSA *rsa, BN_CTX *ctx))
128 {
129 meth->rsa_mod_exp = mod_exp;
130 return 1;
131 }
132
133 int
RSA_meth_set_bn_mod_exp(RSA_METHOD * meth,int (* bn_mod_exp)(BIGNUM * r,const BIGNUM * a,const BIGNUM * p,const BIGNUM * m,BN_CTX * ctx,BN_MONT_CTX * m_ctx))134 RSA_meth_set_bn_mod_exp(RSA_METHOD *meth, int (*bn_mod_exp)(BIGNUM *r,
135 const BIGNUM *a, const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
136 BN_MONT_CTX *m_ctx))
137 {
138 meth->bn_mod_exp = bn_mod_exp;
139 return 1;
140 }
141
142 int
RSA_meth_set_init(RSA_METHOD * meth,int (* init)(RSA * rsa))143 RSA_meth_set_init(RSA_METHOD *meth, int (*init)(RSA *rsa))
144 {
145 meth->init = init;
146 return 1;
147 }
148
149 int
RSA_meth_set_keygen(RSA_METHOD * meth,int (* keygen)(RSA * rsa,int bits,BIGNUM * e,BN_GENCB * cb))150 RSA_meth_set_keygen(RSA_METHOD *meth, int (*keygen)(RSA *rsa, int bits,
151 BIGNUM *e, BN_GENCB *cb))
152 {
153 meth->rsa_keygen = keygen;
154 return 1;
155 }
156
157 int
RSA_meth_set_flags(RSA_METHOD * meth,int flags)158 RSA_meth_set_flags(RSA_METHOD *meth, int flags)
159 {
160 meth->flags = flags;
161 return 1;
162 }
163
164 int
RSA_meth_set0_app_data(RSA_METHOD * meth,void * app_data)165 RSA_meth_set0_app_data(RSA_METHOD *meth, void *app_data)
166 {
167 meth->app_data = app_data;
168 return 1;
169 }
170
171 const char *
RSA_meth_get0_name(const RSA_METHOD * meth)172 RSA_meth_get0_name(const RSA_METHOD *meth)
173 {
174 return meth->name;
175 }
176
177 int
RSA_meth_get_pub_enc(const RSA_METHOD * meth)178 (*RSA_meth_get_pub_enc(const RSA_METHOD *meth))(int flen,
179 const unsigned char *from, unsigned char *to, RSA *rsa, int padding)
180 {
181 return meth->rsa_pub_enc;
182 }
183
184 int
RSA_meth_get_pub_dec(const RSA_METHOD * meth)185 (*RSA_meth_get_pub_dec(const RSA_METHOD *meth))(int flen,
186 const unsigned char *from, unsigned char *to, RSA *rsa, int padding)
187 {
188 return meth->rsa_pub_dec;
189 }
190
191 int
RSA_meth_get_priv_enc(const RSA_METHOD * meth)192 (*RSA_meth_get_priv_enc(const RSA_METHOD *meth))(int flen,
193 const unsigned char *from, unsigned char *to, RSA *rsa, int padding)
194 {
195 return meth->rsa_priv_enc;
196 }
197
198 int
RSA_meth_get_priv_dec(const RSA_METHOD * meth)199 (*RSA_meth_get_priv_dec(const RSA_METHOD *meth))(int flen,
200 const unsigned char *from, unsigned char *to, RSA *rsa, int padding)
201 {
202 return meth->rsa_priv_dec;
203 }
204
205 int
RSA_meth_get_mod_exp(const RSA_METHOD * meth)206 (*RSA_meth_get_mod_exp(const RSA_METHOD *meth))(BIGNUM *r0, const BIGNUM *i,
207 RSA *rsa, BN_CTX *ctx)
208 {
209 return meth->rsa_mod_exp;
210 }
211
212 int
RSA_meth_get_bn_mod_exp(const RSA_METHOD * meth)213 (*RSA_meth_get_bn_mod_exp(const RSA_METHOD *meth))(BIGNUM *r,
214 const BIGNUM *a, const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
215 BN_MONT_CTX *m_ctx)
216 {
217 return meth->bn_mod_exp;
218 }
219
220 int
RSA_meth_get_init(const RSA_METHOD * meth)221 (*RSA_meth_get_init(const RSA_METHOD *meth))(RSA *rsa)
222 {
223 return meth->init;
224 }
225
226 int
RSA_meth_get_keygen(const RSA_METHOD * meth)227 (*RSA_meth_get_keygen(const RSA_METHOD *meth))(RSA *rsa, int bits, BIGNUM *e,
228 BN_GENCB *cb)
229 {
230 return meth->rsa_keygen;
231 }
232
233 int
RSA_meth_get_flags(const RSA_METHOD * meth)234 RSA_meth_get_flags(const RSA_METHOD *meth)
235 {
236 return meth->flags;
237 }
238
239 void *
RSA_meth_get0_app_data(const RSA_METHOD * meth)240 RSA_meth_get0_app_data(const RSA_METHOD *meth)
241 {
242 return meth->app_data;
243 }
244
245 int
RSA_meth_get_sign(const RSA_METHOD * meth)246 (*RSA_meth_get_sign(const RSA_METHOD *meth))(int type,
247 const unsigned char *m, unsigned int m_length,
248 unsigned char *sigret, unsigned int *siglen,
249 const RSA *rsa)
250 {
251 return meth->rsa_sign;
252 }
253
254 int
RSA_meth_set_sign(RSA_METHOD * meth,int (* sign)(int type,const unsigned char * m,unsigned int m_length,unsigned char * sigret,unsigned int * siglen,const RSA * rsa))255 RSA_meth_set_sign(RSA_METHOD *meth, int (*sign)(int type,
256 const unsigned char *m, unsigned int m_length, unsigned char *sigret,
257 unsigned int *siglen, const RSA *rsa))
258 {
259 meth->rsa_sign = sign;
260 return 1;
261 }
262
263 int
RSA_meth_get_verify(const RSA_METHOD * meth)264 (*RSA_meth_get_verify(const RSA_METHOD *meth))(int dtype,
265 const unsigned char *m, unsigned int m_length, const unsigned char *sigbuf,
266 unsigned int siglen, const RSA *rsa)
267 {
268 return meth->rsa_verify;
269 }
270
271 int
RSA_meth_set_verify(RSA_METHOD * meth,int (* verify)(int dtype,const unsigned char * m,unsigned int m_length,const unsigned char * sigbuf,unsigned int siglen,const RSA * rsa))272 RSA_meth_set_verify(RSA_METHOD *meth, int (*verify)(int dtype,
273 const unsigned char *m, unsigned int m_length, const unsigned char *sigbuf,
274 unsigned int siglen, const RSA *rsa))
275 {
276 meth->rsa_verify = verify;
277 return 1;
278 }
279