1 /* $OpenBSD: x_algor.c,v 1.41 2024/07/08 14:48:49 beck Exp $ */ 2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 3 * project 2000. 4 */ 5 /* ==================================================================== 6 * Copyright (c) 2000 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 <stddef.h> 60 61 #include <openssl/asn1.h> 62 #include <openssl/asn1t.h> 63 #include <openssl/x509.h> 64 65 #include "x509_local.h" 66 67 static const ASN1_TEMPLATE X509_ALGOR_seq_tt[] = { 68 { 69 .offset = offsetof(X509_ALGOR, algorithm), 70 .field_name = "algorithm", 71 .item = &ASN1_OBJECT_it, 72 }, 73 { 74 .flags = ASN1_TFLG_OPTIONAL, 75 .offset = offsetof(X509_ALGOR, parameter), 76 .field_name = "parameter", 77 .item = &ASN1_ANY_it, 78 }, 79 }; 80 81 const ASN1_ITEM X509_ALGOR_it = { 82 .itype = ASN1_ITYPE_SEQUENCE, 83 .utype = V_ASN1_SEQUENCE, 84 .templates = X509_ALGOR_seq_tt, 85 .tcount = sizeof(X509_ALGOR_seq_tt) / sizeof(ASN1_TEMPLATE), 86 .size = sizeof(X509_ALGOR), 87 .sname = "X509_ALGOR", 88 }; 89 LCRYPTO_ALIAS(X509_ALGOR_it); 90 91 static const ASN1_TEMPLATE X509_ALGORS_item_tt = { 92 .flags = ASN1_TFLG_SEQUENCE_OF, 93 .tag = 0, 94 .offset = 0, 95 .field_name = "algorithms", 96 .item = &X509_ALGOR_it, 97 }; 98 99 const ASN1_ITEM X509_ALGORS_it = { 100 .itype = ASN1_ITYPE_PRIMITIVE, 101 .utype = -1, 102 .templates = &X509_ALGORS_item_tt, 103 .tcount = 0, 104 .funcs = NULL, 105 .size = 0, 106 .sname = "X509_ALGORS", 107 }; 108 LCRYPTO_ALIAS(X509_ALGORS_it); 109 110 X509_ALGOR * 111 d2i_X509_ALGOR(X509_ALGOR **a, const unsigned char **in, long len) 112 { 113 return (X509_ALGOR *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 114 &X509_ALGOR_it); 115 } 116 LCRYPTO_ALIAS(d2i_X509_ALGOR); 117 118 int 119 i2d_X509_ALGOR(X509_ALGOR *a, unsigned char **out) 120 { 121 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_ALGOR_it); 122 } 123 LCRYPTO_ALIAS(i2d_X509_ALGOR); 124 125 X509_ALGOR * 126 X509_ALGOR_new(void) 127 { 128 return (X509_ALGOR *)ASN1_item_new(&X509_ALGOR_it); 129 } 130 LCRYPTO_ALIAS(X509_ALGOR_new); 131 132 void 133 X509_ALGOR_free(X509_ALGOR *a) 134 { 135 ASN1_item_free((ASN1_VALUE *)a, &X509_ALGOR_it); 136 } 137 LCRYPTO_ALIAS(X509_ALGOR_free); 138 139 X509_ALGORS * 140 d2i_X509_ALGORS(X509_ALGORS **a, const unsigned char **in, long len) 141 { 142 return (X509_ALGORS *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 143 &X509_ALGORS_it); 144 } 145 LCRYPTO_ALIAS(d2i_X509_ALGORS); 146 147 int 148 i2d_X509_ALGORS(X509_ALGORS *a, unsigned char **out) 149 { 150 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_ALGORS_it); 151 } 152 LCRYPTO_ALIAS(i2d_X509_ALGORS); 153 154 X509_ALGOR * 155 X509_ALGOR_dup(X509_ALGOR *x) 156 { 157 return ASN1_item_dup(&X509_ALGOR_it, x); 158 } 159 LCRYPTO_ALIAS(X509_ALGOR_dup); 160 161 static int 162 X509_ALGOR_set0_obj(X509_ALGOR *alg, ASN1_OBJECT *aobj) 163 { 164 ASN1_OBJECT_free(alg->algorithm); 165 alg->algorithm = aobj; 166 167 return 1; 168 } 169 170 static int 171 X509_ALGOR_set_obj_by_nid(X509_ALGOR *alg, int nid) 172 { 173 ASN1_OBJECT *aobj; 174 175 if ((aobj = OBJ_nid2obj(nid)) == NULL) 176 return 0; 177 if (!X509_ALGOR_set0_obj(alg, aobj)) 178 return 0; 179 180 return 1; 181 } 182 183 static int 184 X509_ALGOR_set0_parameter(X509_ALGOR *alg, int parameter_type, 185 void *parameter_value) 186 { 187 if (parameter_type == V_ASN1_UNDEF) { 188 ASN1_TYPE_free(alg->parameter); 189 alg->parameter = NULL; 190 191 return 1; 192 } 193 194 if (alg->parameter == NULL) 195 alg->parameter = ASN1_TYPE_new(); 196 if (alg->parameter == NULL) 197 return 0; 198 199 if (parameter_type != 0) 200 ASN1_TYPE_set(alg->parameter, parameter_type, parameter_value); 201 202 return 1; 203 } 204 205 int 206 X509_ALGOR_set0_by_nid(X509_ALGOR *alg, int nid, int parameter_type, 207 void *parameter_value) 208 { 209 if (alg == NULL) 210 return 0; 211 212 if (!X509_ALGOR_set_obj_by_nid(alg, nid)) 213 return 0; 214 215 if (!X509_ALGOR_set0_parameter(alg, parameter_type, parameter_value)) 216 return 0; 217 218 return 1; 219 } 220 221 int 222 X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int parameter_type, 223 void *parameter_value) 224 { 225 if (alg == NULL) 226 return 0; 227 228 /* Set parameter first to preserve public API behavior on failure. */ 229 if (!X509_ALGOR_set0_parameter(alg, parameter_type, parameter_value)) 230 return 0; 231 232 if (!X509_ALGOR_set0_obj(alg, aobj)) 233 return 0; 234 235 return 1; 236 } 237 LCRYPTO_ALIAS(X509_ALGOR_set0); 238 239 void 240 X509_ALGOR_get0(const ASN1_OBJECT **out_aobj, int *out_type, 241 const void **out_value, const X509_ALGOR *alg) 242 { 243 int type = V_ASN1_UNDEF; 244 const void *value = NULL; 245 246 if (out_aobj != NULL) 247 *out_aobj = alg->algorithm; 248 249 /* Ensure out_value is not left uninitialized if out_type is NULL. */ 250 if (out_value != NULL) 251 *out_value = NULL; 252 253 if (out_type == NULL) 254 return; 255 256 if (alg->parameter != NULL) { 257 type = alg->parameter->type; 258 value = alg->parameter->value.ptr; 259 } 260 261 *out_type = type; 262 if (out_value != NULL) 263 *out_value = value; 264 } 265 LCRYPTO_ALIAS(X509_ALGOR_get0); 266 267 int 268 X509_ALGOR_set_evp_md(X509_ALGOR *alg, const EVP_MD *md) 269 { 270 int parameter_type = V_ASN1_NULL; 271 int nid = EVP_MD_type(md); 272 273 if ((EVP_MD_flags(md) & EVP_MD_FLAG_DIGALGID_ABSENT) != 0) 274 parameter_type = V_ASN1_UNDEF; 275 276 if (!X509_ALGOR_set0_by_nid(alg, nid, parameter_type, NULL)) 277 return 0; 278 279 return 1; 280 } 281 282 int 283 X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b) 284 { 285 int cmp; 286 287 if ((cmp = OBJ_cmp(a->algorithm, b->algorithm)) != 0) 288 return cmp; 289 290 if (a->parameter == NULL && b->parameter == NULL) 291 return 0; 292 293 return ASN1_TYPE_cmp(a->parameter, b->parameter); 294 } 295 LCRYPTO_ALIAS(X509_ALGOR_cmp); 296