1 /* $OpenBSD: x_algor.c,v 1.23 2021/12/12 14:27:20 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 #include <openssl/x509.h> 61 #include <openssl/asn1.h> 62 #include <openssl/asn1t.h> 63 64 static const ASN1_TEMPLATE X509_ALGOR_seq_tt[] = { 65 { 66 .offset = offsetof(X509_ALGOR, algorithm), 67 .field_name = "algorithm", 68 .item = &ASN1_OBJECT_it, 69 }, 70 { 71 .flags = ASN1_TFLG_OPTIONAL, 72 .offset = offsetof(X509_ALGOR, parameter), 73 .field_name = "parameter", 74 .item = &ASN1_ANY_it, 75 }, 76 }; 77 78 const ASN1_ITEM X509_ALGOR_it = { 79 .itype = ASN1_ITYPE_SEQUENCE, 80 .utype = V_ASN1_SEQUENCE, 81 .templates = X509_ALGOR_seq_tt, 82 .tcount = sizeof(X509_ALGOR_seq_tt) / sizeof(ASN1_TEMPLATE), 83 .size = sizeof(X509_ALGOR), 84 .sname = "X509_ALGOR", 85 }; 86 87 static const ASN1_TEMPLATE X509_ALGORS_item_tt = { 88 .flags = ASN1_TFLG_SEQUENCE_OF, 89 .tag = 0, 90 .offset = 0, 91 .field_name = "algorithms", 92 .item = &X509_ALGOR_it, 93 }; 94 95 const ASN1_ITEM X509_ALGORS_it = { 96 .itype = ASN1_ITYPE_PRIMITIVE, 97 .utype = -1, 98 .templates = &X509_ALGORS_item_tt, 99 .tcount = 0, 100 .funcs = NULL, 101 .size = 0, 102 .sname = "X509_ALGORS", 103 }; 104 105 106 X509_ALGOR * 107 d2i_X509_ALGOR(X509_ALGOR **a, const unsigned char **in, long len) 108 { 109 return (X509_ALGOR *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 110 &X509_ALGOR_it); 111 } 112 113 int 114 i2d_X509_ALGOR(X509_ALGOR *a, unsigned char **out) 115 { 116 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_ALGOR_it); 117 } 118 119 X509_ALGOR * 120 X509_ALGOR_new(void) 121 { 122 return (X509_ALGOR *)ASN1_item_new(&X509_ALGOR_it); 123 } 124 125 void 126 X509_ALGOR_free(X509_ALGOR *a) 127 { 128 ASN1_item_free((ASN1_VALUE *)a, &X509_ALGOR_it); 129 } 130 131 X509_ALGORS * 132 d2i_X509_ALGORS(X509_ALGORS **a, const unsigned char **in, long len) 133 { 134 return (X509_ALGORS *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 135 &X509_ALGORS_it); 136 } 137 138 int 139 i2d_X509_ALGORS(X509_ALGORS *a, unsigned char **out) 140 { 141 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_ALGORS_it); 142 } 143 144 X509_ALGOR * 145 X509_ALGOR_dup(X509_ALGOR *x) 146 { 147 return ASN1_item_dup(&X509_ALGOR_it, x); 148 } 149 150 int 151 X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int ptype, void *pval) 152 { 153 if (!alg) 154 return 0; 155 if (ptype != V_ASN1_UNDEF) { 156 if (alg->parameter == NULL) 157 alg->parameter = ASN1_TYPE_new(); 158 if (alg->parameter == NULL) 159 return 0; 160 } 161 if (alg) { 162 if (alg->algorithm) 163 ASN1_OBJECT_free(alg->algorithm); 164 alg->algorithm = aobj; 165 } 166 if (ptype == 0) 167 return 1; 168 if (ptype == V_ASN1_UNDEF) { 169 if (alg->parameter) { 170 ASN1_TYPE_free(alg->parameter); 171 alg->parameter = NULL; 172 } 173 } else 174 ASN1_TYPE_set(alg->parameter, ptype, pval); 175 return 1; 176 } 177 178 void 179 X509_ALGOR_get0(const ASN1_OBJECT **paobj, int *pptype, const void **ppval, 180 const X509_ALGOR *algor) 181 { 182 if (paobj) 183 *paobj = algor->algorithm; 184 if (pptype) { 185 if (algor->parameter == NULL) { 186 *pptype = V_ASN1_UNDEF; 187 return; 188 } else 189 *pptype = algor->parameter->type; 190 if (ppval) 191 *ppval = algor->parameter->value.ptr; 192 } 193 } 194 195 /* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */ 196 197 void 198 X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md) 199 { 200 int param_type = V_ASN1_NULL; 201 202 if ((EVP_MD_flags(md) & EVP_MD_FLAG_DIGALGID_ABSENT) != 0) 203 param_type = V_ASN1_UNDEF; 204 205 X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_type(md)), param_type, NULL); 206 } 207 208 /* Returns 0 if they are equal, != 0 otherwise. */ 209 int 210 X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b) 211 { 212 int rv = OBJ_cmp(a->algorithm, b->algorithm); 213 if (!rv) { 214 if (!a->parameter && !b->parameter) 215 rv = 0; 216 else 217 rv = ASN1_TYPE_cmp(a->parameter, b->parameter); 218 } 219 return(rv); 220 } 221