v3_lib.c revision 68651
1208600Srdivacky/* v3_lib.c */ 2208600Srdivacky/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL 3208600Srdivacky * project 1999. 4208600Srdivacky */ 5208600Srdivacky/* ==================================================================== 6208600Srdivacky * Copyright (c) 1999 The OpenSSL Project. All rights reserved. 7208600Srdivacky * 8208600Srdivacky * Redistribution and use in source and binary forms, with or without 9208600Srdivacky * modification, are permitted provided that the following conditions 10208600Srdivacky * are met: 11208600Srdivacky * 12208600Srdivacky * 1. Redistributions of source code must retain the above copyright 13208600Srdivacky * notice, this list of conditions and the following disclaimer. 14208600Srdivacky * 15263509Sdim * 2. Redistributions in binary form must reproduce the above copyright 16208600Srdivacky * notice, this list of conditions and the following disclaimer in 17208600Srdivacky * the documentation and/or other materials provided with the 18208600Srdivacky * distribution. 19208600Srdivacky * 20208600Srdivacky * 3. All advertising materials mentioning features or use of this 21245431Sdim * software must display the following acknowledgment: 22208600Srdivacky * "This product includes software developed by the OpenSSL Project 23245431Sdim * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 24235633Sdim * 25245431Sdim * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26235633Sdim * endorse or promote products derived from this software without 27208600Srdivacky * prior written permission. For written permission, please contact 28208600Srdivacky * licensing@OpenSSL.org. 29208600Srdivacky * 30208600Srdivacky * 5. Products derived from this software may not be called "OpenSSL" 31208600Srdivacky * nor may "OpenSSL" appear in their names without prior written 32245431Sdim * permission of the OpenSSL Project. 33208600Srdivacky * 34245431Sdim * 6. Redistributions of any form whatsoever must retain the following 35208600Srdivacky * acknowledgment: 36263509Sdim * "This product includes software developed by the OpenSSL Project 37221345Sdim * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38221345Sdim * 39221345Sdim * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40252723Sdim * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41252723Sdim * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42208600Srdivacky * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43208600Srdivacky * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44208600Srdivacky * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45208600Srdivacky * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46208600Srdivacky * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47245431Sdim * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48245431Sdim * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49208600Srdivacky * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50245431Sdim * OF THE POSSIBILITY OF SUCH DAMAGE. 51208600Srdivacky * ==================================================================== 52208600Srdivacky * 53245431Sdim * This product includes cryptographic software written by Eric Young 54208600Srdivacky * (eay@cryptsoft.com). This product includes software written by Tim 55208600Srdivacky * Hudson (tjh@cryptsoft.com). 56245431Sdim * 57208600Srdivacky */ 58245431Sdim/* X509 v3 extension utilities */ 59208600Srdivacky 60208600Srdivacky#include <stdio.h> 61208600Srdivacky#include "cryptlib.h" 62245431Sdim#include <openssl/conf.h> 63208600Srdivacky#include <openssl/x509v3.h> 64208600Srdivacky 65208600Srdivacky#include "ext_dat.h" 66208600Srdivacky 67208600Srdivackystatic STACK_OF(X509V3_EXT_METHOD) *ext_list = NULL; 68208600Srdivacky 69245431Sdimstatic int ext_cmp(const X509V3_EXT_METHOD * const *a, 70208600Srdivacky const X509V3_EXT_METHOD * const *b); 71245431Sdimstatic void ext_list_free(X509V3_EXT_METHOD *ext); 72208600Srdivacky 73245431Sdimint X509V3_EXT_add(X509V3_EXT_METHOD *ext) 74208600Srdivacky{ 75208600Srdivacky if(!ext_list && !(ext_list = sk_X509V3_EXT_METHOD_new(ext_cmp))) { 76208600Srdivacky X509V3err(X509V3_F_X509V3_EXT_ADD,ERR_R_MALLOC_FAILURE); 77208600Srdivacky return 0; 78208600Srdivacky } 79208600Srdivacky if(!sk_X509V3_EXT_METHOD_push(ext_list, ext)) { 80263509Sdim X509V3err(X509V3_F_X509V3_EXT_ADD,ERR_R_MALLOC_FAILURE); 81208600Srdivacky return 0; 82218893Sdim } 83263509Sdim return 1; 84221345Sdim} 85223017Sdim 86245431Sdimstatic int ext_cmp(const X509V3_EXT_METHOD * const *a, 87235633Sdim const X509V3_EXT_METHOD * const *b) 88252723Sdim{ 89252723Sdim return ((*a)->ext_nid - (*b)->ext_nid); 90252723Sdim} 91245431Sdim 92235633SdimX509V3_EXT_METHOD *X509V3_EXT_get_nid(int nid) 93252723Sdim{ 94252723Sdim X509V3_EXT_METHOD tmp, *t = &tmp, **ret; 95252723Sdim int idx; 96 if(nid < 0) return NULL; 97 tmp.ext_nid = nid; 98 ret = (X509V3_EXT_METHOD **) OBJ_bsearch((char *)&t, 99 (char *)standard_exts, STANDARD_EXTENSION_COUNT, 100 sizeof(X509V3_EXT_METHOD *), (int (*)(const void *, const void *))ext_cmp); 101 if(ret) return *ret; 102 if(!ext_list) return NULL; 103 idx = sk_X509V3_EXT_METHOD_find(ext_list, &tmp); 104 if(idx == -1) return NULL; 105 return sk_X509V3_EXT_METHOD_value(ext_list, idx); 106} 107 108X509V3_EXT_METHOD *X509V3_EXT_get(X509_EXTENSION *ext) 109{ 110 int nid; 111 if((nid = OBJ_obj2nid(ext->object)) == NID_undef) return NULL; 112 return X509V3_EXT_get_nid(nid); 113} 114 115 116int X509V3_EXT_add_list(X509V3_EXT_METHOD *extlist) 117{ 118 for(;extlist->ext_nid!=-1;extlist++) 119 if(!X509V3_EXT_add(extlist)) return 0; 120 return 1; 121} 122 123int X509V3_EXT_add_alias(int nid_to, int nid_from) 124{ 125 X509V3_EXT_METHOD *ext, *tmpext; 126 if(!(ext = X509V3_EXT_get_nid(nid_from))) { 127 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,X509V3_R_EXTENSION_NOT_FOUND); 128 return 0; 129 } 130 if(!(tmpext = (X509V3_EXT_METHOD *)OPENSSL_malloc(sizeof(X509V3_EXT_METHOD)))) { 131 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,ERR_R_MALLOC_FAILURE); 132 return 0; 133 } 134 *tmpext = *ext; 135 tmpext->ext_nid = nid_to; 136 tmpext->ext_flags |= X509V3_EXT_DYNAMIC; 137 return X509V3_EXT_add(tmpext); 138} 139 140void X509V3_EXT_cleanup(void) 141{ 142 sk_X509V3_EXT_METHOD_pop_free(ext_list, ext_list_free); 143 ext_list = NULL; 144} 145 146static void ext_list_free(X509V3_EXT_METHOD *ext) 147{ 148 if(ext->ext_flags & X509V3_EXT_DYNAMIC) OPENSSL_free(ext); 149} 150 151/* Legacy function: we don't need to add standard extensions 152 * any more because they are now kept in ext_dat.h. 153 */ 154 155int X509V3_add_standard_extensions(void) 156{ 157 return 1; 158} 159 160/* Return an extension internal structure */ 161 162void *X509V3_EXT_d2i(X509_EXTENSION *ext) 163{ 164 X509V3_EXT_METHOD *method; 165 unsigned char *p; 166 if(!(method = X509V3_EXT_get(ext)) || !method->d2i) return NULL; 167 p = ext->value->data; 168 return method->d2i(NULL, &p, ext->value->length); 169} 170 171/* Get critical flag and decoded version of extension from a NID. 172 * The "idx" variable returns the last found extension and can 173 * be used to retrieve multiple extensions of the same NID. 174 * However multiple extensions with the same NID is usually 175 * due to a badly encoded certificate so if idx is NULL we 176 * choke if multiple extensions exist. 177 * The "crit" variable is set to the critical value. 178 * The return value is the decoded extension or NULL on 179 * error. The actual error can have several different causes, 180 * the value of *crit reflects the cause: 181 * >= 0, extension found but not decoded (reflects critical value). 182 * -1 extension not found. 183 * -2 extension occurs more than once. 184 */ 185 186void *X509V3_get_d2i(STACK_OF(X509_EXTENSION) *x, int nid, int *crit, int *idx) 187{ 188 int lastpos, i; 189 X509_EXTENSION *ex, *found_ex = NULL; 190 if(!x) { 191 if(idx) *idx = -1; 192 if(crit) *crit = -1; 193 return NULL; 194 } 195 if(idx) lastpos = *idx + 1; 196 else lastpos = 0; 197 if(lastpos < 0) lastpos = 0; 198 for(i = lastpos; i < sk_X509_EXTENSION_num(x); i++) 199 { 200 ex = sk_X509_EXTENSION_value(x, i); 201 if(OBJ_obj2nid(ex->object) == nid) { 202 if(idx) { 203 *idx = i; 204 break; 205 } else if(found_ex) { 206 /* Found more than one */ 207 if(crit) *crit = -2; 208 return NULL; 209 } 210 found_ex = ex; 211 } 212 } 213 if(found_ex) { 214 /* Found it */ 215 if(crit) *crit = found_ex->critical; 216 return X509V3_EXT_d2i(found_ex); 217 } 218 219 /* Extension not found */ 220 if(idx) *idx = -1; 221 if(crit) *crit = -1; 222 return NULL; 223} 224 225IMPLEMENT_STACK_OF(X509V3_EXT_METHOD) 226