1 /* $OpenBSD: x_algor.c,v 1.40 2024/04/09 13:55:02 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 90 static const ASN1_TEMPLATE X509_ALGORS_item_tt = { 91 .flags = ASN1_TFLG_SEQUENCE_OF, 92 .tag = 0, 93 .offset = 0, 94 .field_name = "algorithms", 95 .item = &X509_ALGOR_it, 96 }; 97 98 const ASN1_ITEM X509_ALGORS_it = { 99 .itype = ASN1_ITYPE_PRIMITIVE, 100 .utype = -1, 101 .templates = &X509_ALGORS_item_tt, 102 .tcount = 0, 103 .funcs = NULL, 104 .size = 0, 105 .sname = "X509_ALGORS", 106 }; 107 108 X509_ALGOR * 109 d2i_X509_ALGOR(X509_ALGOR **a, const unsigned char **in, long len) 110 { 111 return (X509_ALGOR *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 112 &X509_ALGOR_it); 113 } 114 LCRYPTO_ALIAS(d2i_X509_ALGOR); 115 116 int 117 i2d_X509_ALGOR(X509_ALGOR *a, unsigned char **out) 118 { 119 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_ALGOR_it); 120 } 121 LCRYPTO_ALIAS(i2d_X509_ALGOR); 122 123 X509_ALGOR * 124 X509_ALGOR_new(void) 125 { 126 return (X509_ALGOR *)ASN1_item_new(&X509_ALGOR_it); 127 } 128 LCRYPTO_ALIAS(X509_ALGOR_new); 129 130 void 131 X509_ALGOR_free(X509_ALGOR *a) 132 { 133 ASN1_item_free((ASN1_VALUE *)a, &X509_ALGOR_it); 134 } 135 LCRYPTO_ALIAS(X509_ALGOR_free); 136 137 X509_ALGORS * 138 d2i_X509_ALGORS(X509_ALGORS **a, const unsigned char **in, long len) 139 { 140 return (X509_ALGORS *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 141 &X509_ALGORS_it); 142 } 143 LCRYPTO_ALIAS(d2i_X509_ALGORS); 144 145 int 146 i2d_X509_ALGORS(X509_ALGORS *a, unsigned char **out) 147 { 148 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_ALGORS_it); 149 } 150 LCRYPTO_ALIAS(i2d_X509_ALGORS); 151 152 X509_ALGOR * 153 X509_ALGOR_dup(X509_ALGOR *x) 154 { 155 return ASN1_item_dup(&X509_ALGOR_it, x); 156 } 157 LCRYPTO_ALIAS(X509_ALGOR_dup); 158 159 static int 160 X509_ALGOR_set0_obj(X509_ALGOR *alg, ASN1_OBJECT *aobj) 161 { 162 ASN1_OBJECT_free(alg->algorithm); 163 alg->algorithm = aobj; 164 165 return 1; 166 } 167 168 static int 169 X509_ALGOR_set_obj_by_nid(X509_ALGOR *alg, int nid) 170 { 171 ASN1_OBJECT *aobj; 172 173 if ((aobj = OBJ_nid2obj(nid)) == NULL) 174 return 0; 175 if (!X509_ALGOR_set0_obj(alg, aobj)) 176 return 0; 177 178 return 1; 179 } 180 181 static int 182 X509_ALGOR_set0_parameter(X509_ALGOR *alg, int parameter_type, 183 void *parameter_value) 184 { 185 if (parameter_type == V_ASN1_UNDEF) { 186 ASN1_TYPE_free(alg->parameter); 187 alg->parameter = NULL; 188 189 return 1; 190 } 191 192 if (alg->parameter == NULL) 193 alg->parameter = ASN1_TYPE_new(); 194 if (alg->parameter == NULL) 195 return 0; 196 197 if (parameter_type != 0) 198 ASN1_TYPE_set(alg->parameter, parameter_type, parameter_value); 199 200 return 1; 201 } 202 203 int 204 X509_ALGOR_set0_by_nid(X509_ALGOR *alg, int nid, int parameter_type, 205 void *parameter_value) 206 { 207 if (alg == NULL) 208 return 0; 209 210 if (!X509_ALGOR_set_obj_by_nid(alg, nid)) 211 return 0; 212 213 if (!X509_ALGOR_set0_parameter(alg, parameter_type, parameter_value)) 214 return 0; 215 216 return 1; 217 } 218 219 int 220 X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int parameter_type, 221 void *parameter_value) 222 { 223 if (alg == NULL) 224 return 0; 225 226 /* Set parameter first to preserve public API behavior on failure. */ 227 if (!X509_ALGOR_set0_parameter(alg, parameter_type, parameter_value)) 228 return 0; 229 230 if (!X509_ALGOR_set0_obj(alg, aobj)) 231 return 0; 232 233 return 1; 234 } 235 LCRYPTO_ALIAS(X509_ALGOR_set0); 236 237 void 238 X509_ALGOR_get0(const ASN1_OBJECT **out_aobj, int *out_type, 239 const void **out_value, const X509_ALGOR *alg) 240 { 241 int type = V_ASN1_UNDEF; 242 const void *value = NULL; 243 244 if (out_aobj != NULL) 245 *out_aobj = alg->algorithm; 246 247 /* Ensure out_value is not left uninitialized if out_type is NULL. */ 248 if (out_value != NULL) 249 *out_value = NULL; 250 251 if (out_type == NULL) 252 return; 253 254 if (alg->parameter != NULL) { 255 type = alg->parameter->type; 256 value = alg->parameter->value.ptr; 257 } 258 259 *out_type = type; 260 if (out_value != NULL) 261 *out_value = value; 262 } 263 LCRYPTO_ALIAS(X509_ALGOR_get0); 264 265 int 266 X509_ALGOR_set_evp_md(X509_ALGOR *alg, const EVP_MD *md) 267 { 268 int parameter_type = V_ASN1_NULL; 269 int nid = EVP_MD_type(md); 270 271 if ((EVP_MD_flags(md) & EVP_MD_FLAG_DIGALGID_ABSENT) != 0) 272 parameter_type = V_ASN1_UNDEF; 273 274 if (!X509_ALGOR_set0_by_nid(alg, nid, parameter_type, NULL)) 275 return 0; 276 277 return 1; 278 } 279 280 int 281 X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b) 282 { 283 int cmp; 284 285 if ((cmp = OBJ_cmp(a->algorithm, b->algorithm)) != 0) 286 return cmp; 287 288 if (a->parameter == NULL && b->parameter == NULL) 289 return 0; 290 291 return ASN1_TYPE_cmp(a->parameter, b->parameter); 292 } 293 LCRYPTO_ALIAS(X509_ALGOR_cmp); 294