1 /* $OpenBSD: rsa_meth.c,v 1.7 2023/07/08 12:26:45 beck 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_local.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 LCRYPTO_ALIAS(RSA_meth_new); 42 43 void 44 RSA_meth_free(RSA_METHOD *meth) 45 { 46 if (meth == NULL) 47 return; 48 49 free(meth->name); 50 free(meth); 51 } 52 LCRYPTO_ALIAS(RSA_meth_free); 53 54 RSA_METHOD * 55 RSA_meth_dup(const RSA_METHOD *meth) 56 { 57 RSA_METHOD *copy; 58 59 if ((copy = calloc(1, sizeof(*copy))) == NULL) 60 return NULL; 61 memcpy(copy, meth, sizeof(*copy)); 62 if ((copy->name = strdup(meth->name)) == NULL) { 63 free(copy); 64 return NULL; 65 } 66 67 return copy; 68 } 69 LCRYPTO_ALIAS(RSA_meth_dup); 70 71 int 72 RSA_meth_set1_name(RSA_METHOD *meth, const char *name) 73 { 74 char *new_name; 75 76 if ((new_name = strdup(name)) == NULL) 77 return 0; 78 free(meth->name); 79 meth->name = new_name; 80 return 1; 81 } 82 LCRYPTO_ALIAS(RSA_meth_set1_name); 83 84 int 85 (*RSA_meth_get_finish(const RSA_METHOD *meth))(RSA *rsa) 86 { 87 return meth->finish; 88 } 89 LCRYPTO_ALIAS(RSA_meth_get_finish); 90 91 int 92 RSA_meth_set_priv_enc(RSA_METHOD *meth, int (*priv_enc)(int flen, 93 const unsigned char *from, unsigned char *to, RSA *rsa, int padding)) 94 { 95 meth->rsa_priv_enc = priv_enc; 96 return 1; 97 } 98 LCRYPTO_ALIAS(RSA_meth_set_priv_enc); 99 100 int 101 RSA_meth_set_priv_dec(RSA_METHOD *meth, int (*priv_dec)(int flen, 102 const unsigned char *from, unsigned char *to, RSA *rsa, int padding)) 103 { 104 meth->rsa_priv_dec = priv_dec; 105 return 1; 106 } 107 LCRYPTO_ALIAS(RSA_meth_set_priv_dec); 108 109 int 110 RSA_meth_set_finish(RSA_METHOD *meth, int (*finish)(RSA *rsa)) 111 { 112 meth->finish = finish; 113 return 1; 114 } 115 LCRYPTO_ALIAS(RSA_meth_set_finish); 116 117 int 118 RSA_meth_set_pub_enc(RSA_METHOD *meth, int (*pub_enc)(int flen, 119 const unsigned char *from, unsigned char *to, RSA *rsa, int padding)) 120 { 121 meth->rsa_pub_enc = pub_enc; 122 return 1; 123 } 124 LCRYPTO_ALIAS(RSA_meth_set_pub_enc); 125 126 int 127 RSA_meth_set_pub_dec(RSA_METHOD *meth, int (*pub_dec)(int flen, 128 const unsigned char *from, unsigned char *to, RSA *rsa, int padding)) 129 { 130 meth->rsa_pub_dec = pub_dec; 131 return 1; 132 } 133 LCRYPTO_ALIAS(RSA_meth_set_pub_dec); 134 135 int 136 RSA_meth_set_mod_exp(RSA_METHOD *meth, int (*mod_exp)(BIGNUM *r0, 137 const BIGNUM *i, RSA *rsa, BN_CTX *ctx)) 138 { 139 meth->rsa_mod_exp = mod_exp; 140 return 1; 141 } 142 LCRYPTO_ALIAS(RSA_meth_set_mod_exp); 143 144 int 145 RSA_meth_set_bn_mod_exp(RSA_METHOD *meth, int (*bn_mod_exp)(BIGNUM *r, 146 const BIGNUM *a, const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, 147 BN_MONT_CTX *m_ctx)) 148 { 149 meth->bn_mod_exp = bn_mod_exp; 150 return 1; 151 } 152 LCRYPTO_ALIAS(RSA_meth_set_bn_mod_exp); 153 154 int 155 RSA_meth_set_init(RSA_METHOD *meth, int (*init)(RSA *rsa)) 156 { 157 meth->init = init; 158 return 1; 159 } 160 LCRYPTO_ALIAS(RSA_meth_set_init); 161 162 int 163 RSA_meth_set_keygen(RSA_METHOD *meth, int (*keygen)(RSA *rsa, int bits, 164 BIGNUM *e, BN_GENCB *cb)) 165 { 166 meth->rsa_keygen = keygen; 167 return 1; 168 } 169 LCRYPTO_ALIAS(RSA_meth_set_keygen); 170 171 int 172 RSA_meth_set_flags(RSA_METHOD *meth, int flags) 173 { 174 meth->flags = flags; 175 return 1; 176 } 177 LCRYPTO_ALIAS(RSA_meth_set_flags); 178 179 int 180 RSA_meth_set0_app_data(RSA_METHOD *meth, void *app_data) 181 { 182 meth->app_data = app_data; 183 return 1; 184 } 185 LCRYPTO_ALIAS(RSA_meth_set0_app_data); 186 187 const char * 188 RSA_meth_get0_name(const RSA_METHOD *meth) 189 { 190 return meth->name; 191 } 192 LCRYPTO_ALIAS(RSA_meth_get0_name); 193 194 int 195 (*RSA_meth_get_pub_enc(const RSA_METHOD *meth))(int flen, 196 const unsigned char *from, unsigned char *to, RSA *rsa, int padding) 197 { 198 return meth->rsa_pub_enc; 199 } 200 LCRYPTO_ALIAS(RSA_meth_get_pub_enc); 201 202 int 203 (*RSA_meth_get_pub_dec(const RSA_METHOD *meth))(int flen, 204 const unsigned char *from, unsigned char *to, RSA *rsa, int padding) 205 { 206 return meth->rsa_pub_dec; 207 } 208 LCRYPTO_ALIAS(RSA_meth_get_pub_dec); 209 210 int 211 (*RSA_meth_get_priv_enc(const RSA_METHOD *meth))(int flen, 212 const unsigned char *from, unsigned char *to, RSA *rsa, int padding) 213 { 214 return meth->rsa_priv_enc; 215 } 216 LCRYPTO_ALIAS(RSA_meth_get_priv_enc); 217 218 int 219 (*RSA_meth_get_priv_dec(const RSA_METHOD *meth))(int flen, 220 const unsigned char *from, unsigned char *to, RSA *rsa, int padding) 221 { 222 return meth->rsa_priv_dec; 223 } 224 LCRYPTO_ALIAS(RSA_meth_get_priv_dec); 225 226 int 227 (*RSA_meth_get_mod_exp(const RSA_METHOD *meth))(BIGNUM *r0, const BIGNUM *i, 228 RSA *rsa, BN_CTX *ctx) 229 { 230 return meth->rsa_mod_exp; 231 } 232 LCRYPTO_ALIAS(RSA_meth_get_mod_exp); 233 234 int 235 (*RSA_meth_get_bn_mod_exp(const RSA_METHOD *meth))(BIGNUM *r, 236 const BIGNUM *a, const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, 237 BN_MONT_CTX *m_ctx) 238 { 239 return meth->bn_mod_exp; 240 } 241 LCRYPTO_ALIAS(RSA_meth_get_bn_mod_exp); 242 243 int 244 (*RSA_meth_get_init(const RSA_METHOD *meth))(RSA *rsa) 245 { 246 return meth->init; 247 } 248 LCRYPTO_ALIAS(RSA_meth_get_init); 249 250 int 251 (*RSA_meth_get_keygen(const RSA_METHOD *meth))(RSA *rsa, int bits, BIGNUM *e, 252 BN_GENCB *cb) 253 { 254 return meth->rsa_keygen; 255 } 256 LCRYPTO_ALIAS(RSA_meth_get_keygen); 257 258 int 259 RSA_meth_get_flags(const RSA_METHOD *meth) 260 { 261 return meth->flags; 262 } 263 LCRYPTO_ALIAS(RSA_meth_get_flags); 264 265 void * 266 RSA_meth_get0_app_data(const RSA_METHOD *meth) 267 { 268 return meth->app_data; 269 } 270 LCRYPTO_ALIAS(RSA_meth_get0_app_data); 271 272 int 273 (*RSA_meth_get_sign(const RSA_METHOD *meth))(int type, 274 const unsigned char *m, unsigned int m_length, 275 unsigned char *sigret, unsigned int *siglen, 276 const RSA *rsa) 277 { 278 return meth->rsa_sign; 279 } 280 LCRYPTO_ALIAS(RSA_meth_get_sign); 281 282 int 283 RSA_meth_set_sign(RSA_METHOD *meth, int (*sign)(int type, 284 const unsigned char *m, unsigned int m_length, unsigned char *sigret, 285 unsigned int *siglen, const RSA *rsa)) 286 { 287 meth->rsa_sign = sign; 288 return 1; 289 } 290 LCRYPTO_ALIAS(RSA_meth_set_sign); 291 292 int 293 (*RSA_meth_get_verify(const RSA_METHOD *meth))(int dtype, 294 const unsigned char *m, unsigned int m_length, const unsigned char *sigbuf, 295 unsigned int siglen, const RSA *rsa) 296 { 297 return meth->rsa_verify; 298 } 299 LCRYPTO_ALIAS(RSA_meth_get_verify); 300 301 int 302 RSA_meth_set_verify(RSA_METHOD *meth, int (*verify)(int dtype, 303 const unsigned char *m, unsigned int m_length, const unsigned char *sigbuf, 304 unsigned int siglen, const RSA *rsa)) 305 { 306 meth->rsa_verify = verify; 307 return 1; 308 } 309 LCRYPTO_ALIAS(RSA_meth_set_verify); 310