/* $OpenBSD: x509_trs.c,v 1.40 2024/01/13 19:57:38 tb Exp $ */ /* Written by Dr Stephen N Henson (steve@openssl.org) 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). * */ #include #include #include #include #include #include #include "crypto_internal.h" #include "x509_local.h" static int obj_trust(int id, X509 *x, int flags) { ASN1_OBJECT *obj; int i, nid; X509_CERT_AUX *ax; ax = x->aux; if (!ax) return X509_TRUST_UNTRUSTED; if (ax->reject) { for (i = 0; i < sk_ASN1_OBJECT_num(ax->reject); i++) { obj = sk_ASN1_OBJECT_value(ax->reject, i); nid = OBJ_obj2nid(obj); if (nid == id || nid == NID_anyExtendedKeyUsage) return X509_TRUST_REJECTED; } } if (ax->trust) { for (i = 0; i < sk_ASN1_OBJECT_num(ax->trust); i++) { obj = sk_ASN1_OBJECT_value(ax->trust, i); nid = OBJ_obj2nid(obj); if (nid == id || nid == NID_anyExtendedKeyUsage) return X509_TRUST_TRUSTED; } } return X509_TRUST_UNTRUSTED; } static int trust_compat(X509_TRUST *trust, X509 *x, int flags) { X509_check_purpose(x, -1, 0); if (x->ex_flags & EXFLAG_SS) return X509_TRUST_TRUSTED; else return X509_TRUST_UNTRUSTED; } static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags) { if (x->aux && (x->aux->trust || x->aux->reject)) return obj_trust(trust->arg1, x, flags); /* we don't have any trust settings: for compatibility * we return trusted if it is self signed */ return trust_compat(trust, x, flags); } static int trust_1oid(X509_TRUST *trust, X509 *x, int flags) { if (x->aux) return obj_trust(trust->arg1, x, flags); return X509_TRUST_UNTRUSTED; } /* WARNING: the following table should be kept in order of trust * and without any gaps so we can just subtract the minimum trust * value to get an index into the table */ static const X509_TRUST trstandard[] = { { .trust = X509_TRUST_COMPAT, .check_trust = trust_compat, .name = "compatible", }, { .trust = X509_TRUST_SSL_CLIENT, .check_trust = trust_1oidany, .name = "SSL Client", .arg1 = NID_client_auth, }, { .trust = X509_TRUST_SSL_SERVER, .check_trust = trust_1oidany, .name = "SSL Server", .arg1 = NID_server_auth, }, { .trust = X509_TRUST_EMAIL, .check_trust = trust_1oidany, .name = "S/MIME email", .arg1 = NID_email_protect, }, { .trust = X509_TRUST_OBJECT_SIGN, .check_trust = trust_1oidany, .name = "Object Signer", .arg1 = NID_code_sign, }, { .trust = X509_TRUST_OCSP_SIGN, .check_trust = trust_1oid, .name = "OCSP responder", .arg1 = NID_OCSP_sign, }, { .trust = X509_TRUST_OCSP_REQUEST, .check_trust = trust_1oid, .name = "OCSP request", .arg1 = NID_ad_OCSP, }, { .trust = X509_TRUST_TSA, .check_trust = trust_1oidany, .name = "TSA server", .arg1 = NID_time_stamp, }, }; #define X509_TRUST_COUNT (sizeof(trstandard) / sizeof(trstandard[0])) CTASSERT(X509_TRUST_MIN == 1 && X509_TRUST_MAX == X509_TRUST_COUNT); int X509_check_trust(X509 *x, int trust_id, int flags) { const X509_TRUST *trust; int idx; if (trust_id == -1) return 1; /* * XXX beck/jsing This enables self signed certs to be trusted for * an unspecified id/trust flag value (this is NOT the * X509_TRUST_DEFAULT), which was the longstanding * openssl behaviour. boringssl does not have this behaviour. * * This should be revisited, but changing the default "not default" * may break things. */ if (trust_id == 0) { int rv; rv = obj_trust(NID_anyExtendedKeyUsage, x, 0); if (rv != X509_TRUST_UNTRUSTED) return rv; return trust_compat(NULL, x, 0); } if (trust_id < X509_TRUST_MIN || trust_id > X509_TRUST_MAX) return obj_trust(trust_id, x, flags); idx = trust_id - X509_TRUST_MIN; trust = &trstandard[idx]; return trust->check_trust((X509_TRUST *)trust, x, flags); } LCRYPTO_ALIAS(X509_check_trust); /* * Remove all the functions below in the next bump. */ int (*X509_TRUST_set_default(int (*trust)(int , X509 *, int)))(int, X509 *, int) { X509error(ERR_R_DISABLED); return NULL; } LCRYPTO_ALIAS(X509_TRUST_set_default); int X509_TRUST_get_count(void) { return X509_TRUST_COUNT; } LCRYPTO_ALIAS(X509_TRUST_get_count); X509_TRUST * X509_TRUST_get0(int idx) { X509error(ERR_R_DISABLED); return NULL; } LCRYPTO_ALIAS(X509_TRUST_get0); int X509_TRUST_get_by_id(int id) { X509error(ERR_R_DISABLED); return -1; } LCRYPTO_ALIAS(X509_TRUST_get_by_id); int X509_TRUST_set(int *t, int trust) { X509error(ERR_R_DISABLED); return 0; } LCRYPTO_ALIAS(X509_TRUST_set); int X509_TRUST_add(int id, int flags, int (*ck)(X509_TRUST *, X509 *, int), const char *name, int arg1, void *arg2) { X509error(ERR_R_DISABLED); return 0; } LCRYPTO_ALIAS(X509_TRUST_add); void X509_TRUST_cleanup(void) { } LCRYPTO_ALIAS(X509_TRUST_cleanup); int X509_TRUST_get_flags(const X509_TRUST *xp) { return xp->flags; } LCRYPTO_ALIAS(X509_TRUST_get_flags); char * X509_TRUST_get0_name(const X509_TRUST *xp) { return xp->name; } LCRYPTO_ALIAS(X509_TRUST_get0_name); int X509_TRUST_get_trust(const X509_TRUST *xp) { return xp->trust; } LCRYPTO_ALIAS(X509_TRUST_get_trust);