1 /* $OpenBSD: rsa_asn1.c,v 1.17 2023/07/08 12:26:45 beck Exp $ */ 2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 3 * project 2000. 4 */ 5 /* ==================================================================== 6 * Copyright (c) 2000-2005 The OpenSSL Project. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. All advertising materials mentioning features or use of this 21 * software must display the following acknowledgment: 22 * "This product includes software developed by the OpenSSL Project 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 24 * 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26 * endorse or promote products derived from this software without 27 * prior written permission. For written permission, please contact 28 * licensing@OpenSSL.org. 29 * 30 * 5. Products derived from this software may not be called "OpenSSL" 31 * nor may "OpenSSL" appear in their names without prior written 32 * permission of the OpenSSL Project. 33 * 34 * 6. Redistributions of any form whatsoever must retain the following 35 * acknowledgment: 36 * "This product includes software developed by the OpenSSL Project 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50 * OF THE POSSIBILITY OF SUCH DAMAGE. 51 * ==================================================================== 52 * 53 * This product includes cryptographic software written by Eric Young 54 * (eay@cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh@cryptsoft.com). 56 * 57 */ 58 59 #include <stdio.h> 60 61 #include <openssl/asn1t.h> 62 #include <openssl/bn.h> 63 #include <openssl/rsa.h> 64 #include <openssl/x509.h> 65 66 #include "rsa_local.h" 67 68 /* Override the default free and new methods */ 69 static int 70 rsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) 71 { 72 if (operation == ASN1_OP_NEW_PRE) { 73 *pval = (ASN1_VALUE *)RSA_new(); 74 if (*pval) 75 return 2; 76 return 0; 77 } else if (operation == ASN1_OP_FREE_PRE) { 78 RSA_free((RSA *)*pval); 79 *pval = NULL; 80 return 2; 81 } 82 return 1; 83 } 84 85 static const ASN1_AUX RSAPrivateKey_aux = { 86 .app_data = NULL, 87 .flags = 0, 88 .ref_offset = 0, 89 .ref_lock = 0, 90 .asn1_cb = rsa_cb, 91 .enc_offset = 0, 92 }; 93 static const ASN1_TEMPLATE RSAPrivateKey_seq_tt[] = { 94 { 95 .flags = 0, 96 .tag = 0, 97 .offset = offsetof(RSA, version), 98 .field_name = "version", 99 .item = &LONG_it, 100 }, 101 { 102 .flags = 0, 103 .tag = 0, 104 .offset = offsetof(RSA, n), 105 .field_name = "n", 106 .item = &BIGNUM_it, 107 }, 108 { 109 .flags = 0, 110 .tag = 0, 111 .offset = offsetof(RSA, e), 112 .field_name = "e", 113 .item = &BIGNUM_it, 114 }, 115 { 116 .flags = 0, 117 .tag = 0, 118 .offset = offsetof(RSA, d), 119 .field_name = "d", 120 .item = &BIGNUM_it, 121 }, 122 { 123 .flags = 0, 124 .tag = 0, 125 .offset = offsetof(RSA, p), 126 .field_name = "p", 127 .item = &BIGNUM_it, 128 }, 129 { 130 .flags = 0, 131 .tag = 0, 132 .offset = offsetof(RSA, q), 133 .field_name = "q", 134 .item = &BIGNUM_it, 135 }, 136 { 137 .flags = 0, 138 .tag = 0, 139 .offset = offsetof(RSA, dmp1), 140 .field_name = "dmp1", 141 .item = &BIGNUM_it, 142 }, 143 { 144 .flags = 0, 145 .tag = 0, 146 .offset = offsetof(RSA, dmq1), 147 .field_name = "dmq1", 148 .item = &BIGNUM_it, 149 }, 150 { 151 .flags = 0, 152 .tag = 0, 153 .offset = offsetof(RSA, iqmp), 154 .field_name = "iqmp", 155 .item = &BIGNUM_it, 156 }, 157 }; 158 159 const ASN1_ITEM RSAPrivateKey_it = { 160 .itype = ASN1_ITYPE_SEQUENCE, 161 .utype = V_ASN1_SEQUENCE, 162 .templates = RSAPrivateKey_seq_tt, 163 .tcount = sizeof(RSAPrivateKey_seq_tt) / sizeof(ASN1_TEMPLATE), 164 .funcs = &RSAPrivateKey_aux, 165 .size = sizeof(RSA), 166 .sname = "RSA", 167 }; 168 169 170 static const ASN1_AUX RSAPublicKey_aux = { 171 .app_data = NULL, 172 .flags = 0, 173 .ref_offset = 0, 174 .ref_lock = 0, 175 .asn1_cb = rsa_cb, 176 .enc_offset = 0, 177 }; 178 static const ASN1_TEMPLATE RSAPublicKey_seq_tt[] = { 179 { 180 .flags = 0, 181 .tag = 0, 182 .offset = offsetof(RSA, n), 183 .field_name = "n", 184 .item = &BIGNUM_it, 185 }, 186 { 187 .flags = 0, 188 .tag = 0, 189 .offset = offsetof(RSA, e), 190 .field_name = "e", 191 .item = &BIGNUM_it, 192 }, 193 }; 194 195 const ASN1_ITEM RSAPublicKey_it = { 196 .itype = ASN1_ITYPE_SEQUENCE, 197 .utype = V_ASN1_SEQUENCE, 198 .templates = RSAPublicKey_seq_tt, 199 .tcount = sizeof(RSAPublicKey_seq_tt) / sizeof(ASN1_TEMPLATE), 200 .funcs = &RSAPublicKey_aux, 201 .size = sizeof(RSA), 202 .sname = "RSA", 203 }; 204 205 static int 206 rsa_pss_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) 207 { 208 /* Free up maskHash */ 209 if (operation == ASN1_OP_FREE_PRE) { 210 RSA_PSS_PARAMS *pss = (RSA_PSS_PARAMS *)*pval; 211 X509_ALGOR_free(pss->maskHash); 212 } 213 return 1; 214 } 215 216 static const ASN1_AUX RSA_PSS_PARAMS_aux = { 217 .app_data = NULL, 218 .flags = 0, 219 .ref_offset = 0, 220 .ref_lock = 0, 221 .asn1_cb = rsa_pss_cb, 222 .enc_offset = 0, 223 }; 224 225 static const ASN1_TEMPLATE RSA_PSS_PARAMS_seq_tt[] = { 226 { 227 .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL, 228 .tag = 0, 229 .offset = offsetof(RSA_PSS_PARAMS, hashAlgorithm), 230 .field_name = "hashAlgorithm", 231 .item = &X509_ALGOR_it, 232 }, 233 { 234 .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL, 235 .tag = 1, 236 .offset = offsetof(RSA_PSS_PARAMS, maskGenAlgorithm), 237 .field_name = "maskGenAlgorithm", 238 .item = &X509_ALGOR_it, 239 }, 240 { 241 .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL, 242 .tag = 2, 243 .offset = offsetof(RSA_PSS_PARAMS, saltLength), 244 .field_name = "saltLength", 245 .item = &ASN1_INTEGER_it, 246 }, 247 { 248 .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL, 249 .tag = 3, 250 .offset = offsetof(RSA_PSS_PARAMS, trailerField), 251 .field_name = "trailerField", 252 .item = &ASN1_INTEGER_it, 253 }, 254 }; 255 256 const ASN1_ITEM RSA_PSS_PARAMS_it = { 257 .itype = ASN1_ITYPE_SEQUENCE, 258 .utype = V_ASN1_SEQUENCE, 259 .templates = RSA_PSS_PARAMS_seq_tt, 260 .tcount = sizeof(RSA_PSS_PARAMS_seq_tt) / sizeof(ASN1_TEMPLATE), 261 .funcs = &RSA_PSS_PARAMS_aux, 262 .size = sizeof(RSA_PSS_PARAMS), 263 .sname = "RSA_PSS_PARAMS", 264 }; 265 266 RSA_PSS_PARAMS * 267 d2i_RSA_PSS_PARAMS(RSA_PSS_PARAMS **a, const unsigned char **in, long len) 268 { 269 return (RSA_PSS_PARAMS *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 270 &RSA_PSS_PARAMS_it); 271 } 272 LCRYPTO_ALIAS(d2i_RSA_PSS_PARAMS); 273 274 int 275 i2d_RSA_PSS_PARAMS(RSA_PSS_PARAMS *a, unsigned char **out) 276 { 277 return ASN1_item_i2d((ASN1_VALUE *)a, out, &RSA_PSS_PARAMS_it); 278 } 279 LCRYPTO_ALIAS(i2d_RSA_PSS_PARAMS); 280 281 RSA_PSS_PARAMS * 282 RSA_PSS_PARAMS_new(void) 283 { 284 return (RSA_PSS_PARAMS *)ASN1_item_new(&RSA_PSS_PARAMS_it); 285 } 286 LCRYPTO_ALIAS(RSA_PSS_PARAMS_new); 287 288 void 289 RSA_PSS_PARAMS_free(RSA_PSS_PARAMS *a) 290 { 291 ASN1_item_free((ASN1_VALUE *)a, &RSA_PSS_PARAMS_it); 292 } 293 LCRYPTO_ALIAS(RSA_PSS_PARAMS_free); 294 295 static int 296 rsa_oaep_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) 297 { 298 /* Free up maskHash */ 299 if (operation == ASN1_OP_FREE_PRE) { 300 RSA_OAEP_PARAMS *oaep = (RSA_OAEP_PARAMS *)*pval; 301 X509_ALGOR_free(oaep->maskHash); 302 } 303 return 1; 304 } 305 306 static const ASN1_AUX RSA_OAEP_PARAMS_aux = { 307 .app_data = NULL, 308 .flags = 0, 309 .ref_offset = 0, 310 .ref_lock = 0, 311 .asn1_cb = rsa_oaep_cb, 312 .enc_offset = 0, 313 }; 314 315 static const ASN1_TEMPLATE RSA_OAEP_PARAMS_seq_tt[] = { 316 { 317 .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL, 318 .tag = 0, 319 .offset = offsetof(RSA_OAEP_PARAMS, hashFunc), 320 .field_name = "hashFunc", 321 .item = &X509_ALGOR_it, 322 }, 323 { 324 .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL, 325 .tag = 1, 326 .offset = offsetof(RSA_OAEP_PARAMS, maskGenFunc), 327 .field_name = "maskGenFunc", 328 .item = &X509_ALGOR_it, 329 }, 330 { 331 .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL, 332 .tag = 2, 333 .offset = offsetof(RSA_OAEP_PARAMS, pSourceFunc), 334 .field_name = "pSourceFunc", 335 .item = &X509_ALGOR_it, 336 }, 337 }; 338 339 const ASN1_ITEM RSA_OAEP_PARAMS_it = { 340 .itype = ASN1_ITYPE_SEQUENCE, 341 .utype = V_ASN1_SEQUENCE, 342 .templates = RSA_OAEP_PARAMS_seq_tt, 343 .tcount = sizeof(RSA_OAEP_PARAMS_seq_tt) / sizeof(ASN1_TEMPLATE), 344 .funcs = &RSA_OAEP_PARAMS_aux, 345 .size = sizeof(RSA_OAEP_PARAMS), 346 .sname = "RSA_OAEP_PARAMS", 347 }; 348 349 350 RSA_OAEP_PARAMS * 351 d2i_RSA_OAEP_PARAMS(RSA_OAEP_PARAMS **a, const unsigned char **in, long len) 352 { 353 return (RSA_OAEP_PARAMS *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 354 &RSA_OAEP_PARAMS_it); 355 } 356 LCRYPTO_ALIAS(d2i_RSA_OAEP_PARAMS); 357 358 int 359 i2d_RSA_OAEP_PARAMS(RSA_OAEP_PARAMS *a, unsigned char **out) 360 { 361 return ASN1_item_i2d((ASN1_VALUE *)a, out, &RSA_OAEP_PARAMS_it); 362 } 363 LCRYPTO_ALIAS(i2d_RSA_OAEP_PARAMS); 364 365 RSA_OAEP_PARAMS * 366 RSA_OAEP_PARAMS_new(void) 367 { 368 return (RSA_OAEP_PARAMS *)ASN1_item_new(&RSA_OAEP_PARAMS_it); 369 } 370 LCRYPTO_ALIAS(RSA_OAEP_PARAMS_new); 371 372 void 373 RSA_OAEP_PARAMS_free(RSA_OAEP_PARAMS *a) 374 { 375 ASN1_item_free((ASN1_VALUE *)a, &RSA_OAEP_PARAMS_it); 376 } 377 LCRYPTO_ALIAS(RSA_OAEP_PARAMS_free); 378 379 RSA * 380 d2i_RSAPrivateKey(RSA **a, const unsigned char **in, long len) 381 { 382 return (RSA *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 383 &RSAPrivateKey_it); 384 } 385 LCRYPTO_ALIAS(d2i_RSAPrivateKey); 386 387 int 388 i2d_RSAPrivateKey(const RSA *a, unsigned char **out) 389 { 390 return ASN1_item_i2d((ASN1_VALUE *)a, out, &RSAPrivateKey_it); 391 } 392 LCRYPTO_ALIAS(i2d_RSAPrivateKey); 393 394 395 RSA * 396 d2i_RSAPublicKey(RSA **a, const unsigned char **in, long len) 397 { 398 return (RSA *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 399 &RSAPublicKey_it); 400 } 401 LCRYPTO_ALIAS(d2i_RSAPublicKey); 402 403 int 404 i2d_RSAPublicKey(const RSA *a, unsigned char **out) 405 { 406 return ASN1_item_i2d((ASN1_VALUE *)a, out, &RSAPublicKey_it); 407 } 408 LCRYPTO_ALIAS(i2d_RSAPublicKey); 409 410 RSA * 411 RSAPublicKey_dup(RSA *rsa) 412 { 413 return ASN1_item_dup(&RSAPublicKey_it, rsa); 414 } 415 LCRYPTO_ALIAS(RSAPublicKey_dup); 416 417 RSA * 418 RSAPrivateKey_dup(RSA *rsa) 419 { 420 return ASN1_item_dup(&RSAPrivateKey_it, rsa); 421 } 422 LCRYPTO_ALIAS(RSAPrivateKey_dup); 423