1 /* $OpenBSD: x_attrib.c,v 1.15 2021/11/01 20:53:08 tb Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <stdio.h> 60 61 #include <openssl/asn1t.h> 62 #include <openssl/objects.h> 63 #include <openssl/x509.h> 64 65 #include "x509_lcl.h" 66 67 /* X509_ATTRIBUTE: this has the following form: 68 * 69 * typedef struct x509_attributes_st 70 * { 71 * ASN1_OBJECT *object; 72 * int single; 73 * union { 74 * char *ptr; 75 * STACK_OF(ASN1_TYPE) *set; 76 * ASN1_TYPE *single; 77 * } value; 78 * } X509_ATTRIBUTE; 79 * 80 * this needs some extra thought because the CHOICE type is 81 * merged with the main structure and because the value can 82 * be anything at all we *must* try the SET OF first because 83 * the ASN1_ANY type will swallow anything including the whole 84 * SET OF structure. 85 */ 86 87 static const ASN1_TEMPLATE X509_ATTRIBUTE_SET_ch_tt[] = { 88 { 89 .flags = ASN1_TFLG_SET_OF, 90 .tag = 0, 91 .offset = offsetof(X509_ATTRIBUTE, value.set), 92 .field_name = "value.set", 93 .item = &ASN1_ANY_it, 94 }, 95 { 96 .flags = 0, 97 .tag = 0, 98 .offset = offsetof(X509_ATTRIBUTE, value.single), 99 .field_name = "value.single", 100 .item = &ASN1_ANY_it, 101 }, 102 }; 103 104 const ASN1_ITEM X509_ATTRIBUTE_SET_it = { 105 .itype = ASN1_ITYPE_CHOICE, 106 .utype = offsetof(X509_ATTRIBUTE, single), 107 .templates = X509_ATTRIBUTE_SET_ch_tt, 108 .tcount = sizeof(X509_ATTRIBUTE_SET_ch_tt) / sizeof(ASN1_TEMPLATE), 109 .funcs = NULL, 110 .size = sizeof(X509_ATTRIBUTE), 111 .sname = "X509_ATTRIBUTE", 112 }; 113 114 static const ASN1_TEMPLATE X509_ATTRIBUTE_seq_tt[] = { 115 { 116 .flags = 0, 117 .tag = 0, 118 .offset = offsetof(X509_ATTRIBUTE, object), 119 .field_name = "object", 120 .item = &ASN1_OBJECT_it, 121 }, 122 /* CHOICE type merged with parent */ 123 { 124 .flags = 0 | ASN1_TFLG_COMBINE, 125 .tag = 0, 126 .offset = 0, 127 .field_name = NULL, 128 .item = &X509_ATTRIBUTE_SET_it, 129 }, 130 }; 131 132 const ASN1_ITEM X509_ATTRIBUTE_it = { 133 .itype = ASN1_ITYPE_SEQUENCE, 134 .utype = V_ASN1_SEQUENCE, 135 .templates = X509_ATTRIBUTE_seq_tt, 136 .tcount = sizeof(X509_ATTRIBUTE_seq_tt) / sizeof(ASN1_TEMPLATE), 137 .funcs = NULL, 138 .size = sizeof(X509_ATTRIBUTE), 139 .sname = "X509_ATTRIBUTE", 140 }; 141 142 143 X509_ATTRIBUTE * 144 d2i_X509_ATTRIBUTE(X509_ATTRIBUTE **a, const unsigned char **in, long len) 145 { 146 return (X509_ATTRIBUTE *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 147 &X509_ATTRIBUTE_it); 148 } 149 150 int 151 i2d_X509_ATTRIBUTE(X509_ATTRIBUTE *a, unsigned char **out) 152 { 153 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_ATTRIBUTE_it); 154 } 155 156 X509_ATTRIBUTE * 157 X509_ATTRIBUTE_new(void) 158 { 159 return (X509_ATTRIBUTE *)ASN1_item_new(&X509_ATTRIBUTE_it); 160 } 161 162 void 163 X509_ATTRIBUTE_free(X509_ATTRIBUTE *a) 164 { 165 ASN1_item_free((ASN1_VALUE *)a, &X509_ATTRIBUTE_it); 166 } 167 168 X509_ATTRIBUTE * 169 X509_ATTRIBUTE_dup(X509_ATTRIBUTE *x) 170 { 171 return ASN1_item_dup(&X509_ATTRIBUTE_it, x); 172 } 173 174 X509_ATTRIBUTE * 175 X509_ATTRIBUTE_create(int nid, int atrtype, void *value) 176 { 177 X509_ATTRIBUTE *ret = NULL; 178 ASN1_TYPE *val = NULL; 179 ASN1_OBJECT *oid; 180 181 if ((oid = OBJ_nid2obj(nid)) == NULL) 182 return (NULL); 183 if ((ret = X509_ATTRIBUTE_new()) == NULL) 184 return (NULL); 185 ret->object = oid; 186 ret->single = 0; 187 if ((ret->value.set = sk_ASN1_TYPE_new_null()) == NULL) 188 goto err; 189 if ((val = ASN1_TYPE_new()) == NULL) 190 goto err; 191 if (!sk_ASN1_TYPE_push(ret->value.set, val)) 192 goto err; 193 194 ASN1_TYPE_set(val, atrtype, value); 195 return (ret); 196 197 err: 198 if (ret != NULL) 199 X509_ATTRIBUTE_free(ret); 200 if (val != NULL) 201 ASN1_TYPE_free(val); 202 return (NULL); 203 } 204