1 /* $OpenBSD: x509_obj.c,v 1.25 2025/01/27 04:24:46 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 <stdint.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 64 #include <openssl/asn1.h> 65 #include <openssl/objects.h> 66 #include <openssl/x509.h> 67 68 #include "bytestring.h" 69 #include "x509_local.h" 70 71 static int 72 X509_NAME_ENTRY_add_object_cbb(CBB *cbb, const ASN1_OBJECT *aobj) 73 { 74 const char *str; 75 char buf[80]; 76 int nid; 77 78 /* Prefer SN over LN, and fall back to textual representation of OID. */ 79 if ((nid = OBJ_obj2nid(aobj)) != NID_undef) { 80 if ((str = OBJ_nid2sn(nid)) != NULL) 81 return CBB_add_bytes(cbb, str, strlen(str)); 82 if ((str = OBJ_nid2ln(nid)) != NULL) 83 return CBB_add_bytes(cbb, str, strlen(str)); 84 } 85 if (OBJ_obj2txt(buf, sizeof(buf), aobj, 1) == 0) 86 return 0; 87 return CBB_add_bytes(cbb, buf, strlen(buf)); 88 } 89 90 static int 91 X509_NAME_ENTRY_add_u8_cbb(CBB *cbb, uint8_t u8) 92 { 93 static const char hex[] = "0123456789ABCDEF"; 94 95 if (' ' <= u8 && u8 <= '~') 96 return CBB_add_u8(cbb, u8); 97 98 if (!CBB_add_u8(cbb, '\\')) 99 return 0; 100 if (!CBB_add_u8(cbb, 'x')) 101 return 0; 102 if (!CBB_add_u8(cbb, hex[u8 >> 4])) 103 return 0; 104 if (!CBB_add_u8(cbb, hex[u8 & 0xf])) 105 return 0; 106 return 1; 107 } 108 109 static int 110 X509_NAME_ENTRY_add_value_cbb(CBB *cbb, const ASN1_STRING *astr) 111 { 112 CBS cbs; 113 uint8_t u8; 114 size_t i; 115 int mask[4] = { 1, 1, 1, 1 }; 116 117 if (astr->type == V_ASN1_GENERALSTRING && astr->length % 4 == 0) { 118 int gs_mask[4] = { 0, 0, 0, 0 }; 119 120 i = 0; 121 CBS_init(&cbs, astr->data, astr->length); 122 while (CBS_len(&cbs) > 0) { 123 if (!CBS_get_u8(&cbs, &u8)) 124 return 0; 125 126 gs_mask[i++ & 0x3] |= u8; 127 } 128 129 if (gs_mask[0] == 0 && gs_mask[1] == 0 && gs_mask[2] == 0) 130 mask[0] = mask[1] = mask[2] = 0; 131 } 132 133 i = 0; 134 CBS_init(&cbs, astr->data, astr->length); 135 while (CBS_len(&cbs) > 0) { 136 if (!CBS_get_u8(&cbs, &u8)) 137 return 0; 138 if (mask[i++ & 0x3] == 0) 139 continue; 140 if (!X509_NAME_ENTRY_add_u8_cbb(cbb, u8)) 141 return 0; 142 } 143 144 return 1; 145 } 146 147 int 148 X509_NAME_ENTRY_add_cbb(CBB *cbb, const X509_NAME_ENTRY *ne) 149 { 150 if (!X509_NAME_ENTRY_add_object_cbb(cbb, ne->object)) 151 return 0; 152 if (!CBB_add_u8(cbb, '=')) 153 return 0; 154 if (!X509_NAME_ENTRY_add_value_cbb(cbb, ne->value)) 155 return 0; 156 return 1; 157 } 158 159 char * 160 X509_NAME_oneline(const X509_NAME *a, char *buf, int len) 161 { 162 CBB cbb; 163 const X509_NAME_ENTRY *ne; 164 uint8_t *line = NULL; 165 size_t line_len = 0; 166 int i; 167 168 if (!CBB_init(&cbb, 0)) 169 goto err; 170 171 for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) { 172 ne = sk_X509_NAME_ENTRY_value(a->entries, i); 173 if (!CBB_add_u8(&cbb, '/')) 174 goto err; 175 if (!X509_NAME_ENTRY_add_cbb(&cbb, ne)) 176 goto err; 177 } 178 179 if (!CBB_add_u8(&cbb, '\0')) 180 goto err; 181 182 if (!CBB_finish(&cbb, &line, &line_len)) 183 goto err; 184 185 if (buf == NULL) 186 return line; 187 188 strlcpy(buf, line, len); 189 free(line); 190 191 return buf; 192 193 err: 194 CBB_cleanup(&cbb); 195 196 return NULL; 197 } 198 LCRYPTO_ALIAS(X509_NAME_oneline); 199