/* v3_lib.c */ /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL * project 1999. */ /* ==================================================================== * Copyright (c) 1999 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * licensing@OpenSSL.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ /* X509 v3 extension utilities */ #include <stdio.h> #include "cryptlib.h" #include <openssl/conf.h> #include <openssl/x509v3.h> #include "ext_dat.h" static STACK_OF(X509V3_EXT_METHOD) *ext_list = NULL; static int ext_cmp(const X509V3_EXT_METHOD * const *a, const X509V3_EXT_METHOD * const *b); static void ext_list_free(X509V3_EXT_METHOD *ext); int X509V3_EXT_add(X509V3_EXT_METHOD *ext) { if(!ext_list && !(ext_list = sk_X509V3_EXT_METHOD_new(ext_cmp))) { X509V3err(X509V3_F_X509V3_EXT_ADD,ERR_R_MALLOC_FAILURE); return 0; } if(!sk_X509V3_EXT_METHOD_push(ext_list, ext)) { X509V3err(X509V3_F_X509V3_EXT_ADD,ERR_R_MALLOC_FAILURE); return 0; } return 1; } static int ext_cmp(const X509V3_EXT_METHOD * const *a, const X509V3_EXT_METHOD * const *b) { return ((*a)->ext_nid - (*b)->ext_nid); } X509V3_EXT_METHOD *X509V3_EXT_get_nid(int nid) { X509V3_EXT_METHOD tmp, *t = &tmp, **ret; int idx; if(nid < 0) return NULL; tmp.ext_nid = nid; ret = (X509V3_EXT_METHOD **) OBJ_bsearch((char *)&t, (char *)standard_exts, STANDARD_EXTENSION_COUNT, sizeof(X509V3_EXT_METHOD *), (int (*)(const void *, const void *))ext_cmp); if(ret) return *ret; if(!ext_list) return NULL; idx = sk_X509V3_EXT_METHOD_find(ext_list, &tmp); if(idx == -1) return NULL; return sk_X509V3_EXT_METHOD_value(ext_list, idx); } X509V3_EXT_METHOD *X509V3_EXT_get(X509_EXTENSION *ext) { int nid; if((nid = OBJ_obj2nid(ext->object)) == NID_undef) return NULL; return X509V3_EXT_get_nid(nid); } int X509V3_EXT_add_list(X509V3_EXT_METHOD *extlist) { for(;extlist->ext_nid!=-1;extlist++) if(!X509V3_EXT_add(extlist)) return 0; return 1; } int X509V3_EXT_add_alias(int nid_to, int nid_from) { X509V3_EXT_METHOD *ext, *tmpext; if(!(ext = X509V3_EXT_get_nid(nid_from))) { X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,X509V3_R_EXTENSION_NOT_FOUND); return 0; } if(!(tmpext = (X509V3_EXT_METHOD *)OPENSSL_malloc(sizeof(X509V3_EXT_METHOD)))) { X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,ERR_R_MALLOC_FAILURE); return 0; } *tmpext = *ext; tmpext->ext_nid = nid_to; tmpext->ext_flags |= X509V3_EXT_DYNAMIC; return X509V3_EXT_add(tmpext); } void X509V3_EXT_cleanup(void) { sk_X509V3_EXT_METHOD_pop_free(ext_list, ext_list_free); ext_list = NULL; } static void ext_list_free(X509V3_EXT_METHOD *ext) { if(ext->ext_flags & X509V3_EXT_DYNAMIC) OPENSSL_free(ext); } /* Legacy function: we don't need to add standard extensions * any more because they are now kept in ext_dat.h. */ int X509V3_add_standard_extensions(void) { return 1; } /* Return an extension internal structure */ void *X509V3_EXT_d2i(X509_EXTENSION *ext) { X509V3_EXT_METHOD *method; unsigned char *p; if(!(method = X509V3_EXT_get(ext)) || !method->d2i) return NULL; p = ext->value->data; return method->d2i(NULL, &p, ext->value->length); } /* Get critical flag and decoded version of extension from a NID. * The "idx" variable returns the last found extension and can * be used to retrieve multiple extensions of the same NID. * However multiple extensions with the same NID is usually * due to a badly encoded certificate so if idx is NULL we * choke if multiple extensions exist. * The "crit" variable is set to the critical value. * The return value is the decoded extension or NULL on * error. The actual error can have several different causes, * the value of *crit reflects the cause: * >= 0, extension found but not decoded (reflects critical value). * -1 extension not found. * -2 extension occurs more than once. */ void *X509V3_get_d2i(STACK_OF(X509_EXTENSION) *x, int nid, int *crit, int *idx) { int lastpos, i; X509_EXTENSION *ex, *found_ex = NULL; if(!x) { if(idx) *idx = -1; if(crit) *crit = -1; return NULL; } if(idx) lastpos = *idx + 1; else lastpos = 0; if(lastpos < 0) lastpos = 0; for(i = lastpos; i < sk_X509_EXTENSION_num(x); i++) { ex = sk_X509_EXTENSION_value(x, i); if(OBJ_obj2nid(ex->object) == nid) { if(idx) { *idx = i; break; } else if(found_ex) { /* Found more than one */ if(crit) *crit = -2; return NULL; } found_ex = ex; } } if(found_ex) { /* Found it */ if(crit) *crit = found_ex->critical; return X509V3_EXT_d2i(found_ex); } /* Extension not found */ if(idx) *idx = -1; if(crit) *crit = -1; return NULL; } IMPLEMENT_STACK_OF(X509V3_EXT_METHOD)