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 * 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 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 * 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 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 81 (*RSA_meth_get_finish(const RSA_METHOD *meth))(RSA *rsa) 82 { 83 return meth->finish; 84 } 85 86 int 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 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 103 RSA_meth_set_finish(RSA_METHOD *meth, int (*finish)(RSA *rsa)) 104 { 105 meth->finish = finish; 106 return 1; 107 } 108 109 int 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 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 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 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 143 RSA_meth_set_init(RSA_METHOD *meth, int (*init)(RSA *rsa)) 144 { 145 meth->init = init; 146 return 1; 147 } 148 149 int 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 158 RSA_meth_set_flags(RSA_METHOD *meth, int flags) 159 { 160 meth->flags = flags; 161 return 1; 162 } 163 164 int 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 * 172 RSA_meth_get0_name(const RSA_METHOD *meth) 173 { 174 return meth->name; 175 } 176 177 int 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 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 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 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 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 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 221 (*RSA_meth_get_init(const RSA_METHOD *meth))(RSA *rsa) 222 { 223 return meth->init; 224 } 225 226 int 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 234 RSA_meth_get_flags(const RSA_METHOD *meth) 235 { 236 return meth->flags; 237 } 238 239 void * 240 RSA_meth_get0_app_data(const RSA_METHOD *meth) 241 { 242 return meth->app_data; 243 } 244 245 int 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 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 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 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