1 /* $OpenBSD: x_algor.c,v 1.34 2023/11/01 20:22:24 tb 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 } 114 115 int 116 i2d_X509_ALGOR(X509_ALGOR *a, unsigned char **out) 117 { 118 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_ALGOR_it); 119 } 120 121 X509_ALGOR * 122 X509_ALGOR_new(void) 123 { 124 return (X509_ALGOR *)ASN1_item_new(&X509_ALGOR_it); 125 } 126 127 void 128 X509_ALGOR_free(X509_ALGOR *a) 129 { 130 ASN1_item_free((ASN1_VALUE *)a, &X509_ALGOR_it); 131 } 132 133 X509_ALGORS * 134 d2i_X509_ALGORS(X509_ALGORS **a, const unsigned char **in, long len) 135 { 136 return (X509_ALGORS *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 137 &X509_ALGORS_it); 138 } 139 140 int 141 i2d_X509_ALGORS(X509_ALGORS *a, unsigned char **out) 142 { 143 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_ALGORS_it); 144 } 145 146 X509_ALGOR * 147 X509_ALGOR_dup(X509_ALGOR *x) 148 { 149 return ASN1_item_dup(&X509_ALGOR_it, x); 150 } 151 152 static int 153 X509_ALGOR_set0_obj(X509_ALGOR *alg, ASN1_OBJECT *aobj) 154 { 155 ASN1_OBJECT_free(alg->algorithm); 156 alg->algorithm = aobj; 157 158 return 1; 159 } 160 161 static int 162 X509_ALGOR_set0_parameter(X509_ALGOR *alg, int ptype, void *pval) 163 { 164 if (ptype == V_ASN1_UNDEF) { 165 ASN1_TYPE_free(alg->parameter); 166 alg->parameter = NULL; 167 168 return 1; 169 } 170 171 if (alg->parameter == NULL) 172 alg->parameter = ASN1_TYPE_new(); 173 if (alg->parameter == NULL) 174 return 0; 175 176 if (ptype != 0) 177 ASN1_TYPE_set(alg->parameter, ptype, pval); 178 179 return 1; 180 } 181 182 int 183 X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int ptype, void *pval) 184 { 185 if (alg == NULL) 186 return 0; 187 188 if (!X509_ALGOR_set0_parameter(alg, ptype, pval)) 189 return 0; 190 191 if (!X509_ALGOR_set0_obj(alg, aobj)) 192 return 0; 193 194 return 1; 195 } 196 197 void 198 X509_ALGOR_get0(const ASN1_OBJECT **out_aobj, int *out_type, 199 const void **out_value, const X509_ALGOR *alg) 200 { 201 int type = V_ASN1_UNDEF; 202 const void *value = NULL; 203 204 if (out_aobj != NULL) 205 *out_aobj = alg->algorithm; 206 207 /* Ensure out_value is not left uninitialized if out_type is NULL. */ 208 if (out_value != NULL) 209 *out_value = NULL; 210 211 if (out_type == NULL) 212 return; 213 214 if (alg->parameter != NULL) { 215 type = alg->parameter->type; 216 value = alg->parameter->value.ptr; 217 } 218 219 *out_type = type; 220 if (out_value != NULL) 221 *out_value = value; 222 } 223 224 int 225 X509_ALGOR_set_evp_md(X509_ALGOR *alg, const EVP_MD *md) 226 { 227 ASN1_OBJECT *aobj; 228 int param_type = V_ASN1_NULL; 229 230 if ((EVP_MD_flags(md) & EVP_MD_FLAG_DIGALGID_ABSENT) != 0) 231 param_type = V_ASN1_UNDEF; 232 233 if ((aobj = OBJ_nid2obj(EVP_MD_type(md))) == NULL) 234 return 0; 235 236 return X509_ALGOR_set0(alg, aobj, param_type, NULL); 237 } 238 239 void 240 X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md) 241 { 242 (void)X509_ALGOR_set_evp_md(alg, md); 243 } 244 245 int 246 X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b) 247 { 248 int cmp; 249 250 if ((cmp = OBJ_cmp(a->algorithm, b->algorithm)) != 0) 251 return cmp; 252 253 if (a->parameter == NULL && b->parameter == NULL) 254 return 0; 255 256 return ASN1_TYPE_cmp(a->parameter, b->parameter); 257 } 258