5d7c222db8
This tidies up verify parameters and adds support for integrated policy checking. Add support for policy related command line options. Currently only in smime application. WARNING: experimental code subject to change.
400 lines
11 KiB
C
400 lines
11 KiB
C
/* x509_vpm.c */
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/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
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* project 2004.
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*/
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/* ====================================================================
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* Copyright (c) 2004 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/crypto.h>
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#include <openssl/lhash.h>
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#include <openssl/buffer.h>
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#include <openssl/x509.h>
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#include <openssl/x509v3.h>
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/* X509_VERIFY_PARAM functions */
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static void x509_verify_param_zero(X509_VERIFY_PARAM *param)
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{
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if (!param)
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return;
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param->name = NULL;
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param->purpose = 0;
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param->trust = 0;
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param->inh_flags = X509_VP_FLAG_DEFAULT;
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param->flags = 0;
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param->depth = -1;
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if (param->policies)
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{
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sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
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param->policies = NULL;
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}
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}
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X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void)
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{
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X509_VERIFY_PARAM *param;
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param = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM));
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memset(param, 0, sizeof(X509_VERIFY_PARAM));
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x509_verify_param_zero(param);
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return param;
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}
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void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param)
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{
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x509_verify_param_zero(param);
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OPENSSL_free(param);
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}
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/* This function determines how parameters are "inherited" from one structure
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* to another. There are several different ways this can happen.
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*
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* 1. If a child structure needs to have its values initialized from a parent
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* they are simply copied across. For example SSL_CTX copied to SSL.
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* 2. If the structure should take on values only if they are currently unset.
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* For example the values in an SSL structure will take appropriate value
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* for SSL servers or clients but only if the application has not set new
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* ones.
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*
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* The "inh_flags" field determines how this function behaves.
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*
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* Normally any values which are set in the default are not copied from the
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* destination and verify flags are ORed together.
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*
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* If X509_VP_FLAG_DEFAULT is set then anything set in the source is copied
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* to the destination. Effectively the values in "to" become default values
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* which will be used only if nothing new is set in "from".
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*
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* If X509_VP_FLAG_OVERWRITE is set then all value are copied across whether
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* they are set or not. Flags is still Ored though.
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*
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* If X509_VP_FLAG_RESET_FLAGS is set then the flags value is copied instead
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* of ORed.
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*
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* If X509_VP_FLAG_LOCKED is set then no values are copied.
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*
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* If X509_VP_FLAG_ONCE is set then the current inh_flags setting is zeroed
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* after the next call.
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*/
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/* Macro to test if a field should be copied from src to dest */
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#define test_x509_verify_param_copy(field, def) \
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(to_overwrite || \
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((src->field != def) && (to_default || (dest->field == def))))
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/* Macro to test and copy a field if necessary */
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#define x509_verify_param_copy(field, def) \
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if (test_x509_verify_param_copy(field, def)) \
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dest->field = src->field
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int X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM *dest,
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const X509_VERIFY_PARAM *src)
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{
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unsigned long inh_flags;
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int to_default, to_overwrite;
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if (!src)
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return 1;
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inh_flags = dest->inh_flags | src->inh_flags;
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if (inh_flags & X509_VP_FLAG_ONCE)
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dest->inh_flags = 0;
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if (inh_flags & X509_VP_FLAG_LOCKED)
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return 1;
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if (inh_flags & X509_VP_FLAG_DEFAULT)
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to_default = 1;
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else
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to_default = 0;
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if (inh_flags & X509_VP_FLAG_OVERWRITE)
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to_overwrite = 1;
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else
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to_overwrite = 0;
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x509_verify_param_copy(purpose, 0);
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x509_verify_param_copy(trust, 0);
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x509_verify_param_copy(depth, -1);
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if (inh_flags & X509_VP_FLAG_RESET_FLAGS)
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dest->flags = 0;
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dest->flags |= src->flags;
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if (test_x509_verify_param_copy(policies, NULL))
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{
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if (!X509_VERIFY_PARAM_set1_policies(dest, src->policies))
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return 0;
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}
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return 1;
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}
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int X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to,
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const X509_VERIFY_PARAM *from)
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{
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to->inh_flags |= X509_VP_FLAG_DEFAULT;
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return X509_VERIFY_PARAM_inherit(to, from);
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}
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int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name)
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{
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if (param->name)
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OPENSSL_free(param->name);
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param->name = BUF_strdup(name);
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if (param->name)
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return 1;
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return 0;
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}
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int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags)
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{
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param->flags |= flags;
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if (flags & X509_V_FLAG_POLICY_MASK)
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param->flags |= X509_V_FLAG_POLICY_CHECK;
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return 1;
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}
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int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose)
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{
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return X509_PURPOSE_set(¶m->purpose, purpose);
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}
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int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust)
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{
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return X509_TRUST_set(¶m->trust, trust);
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}
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void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth)
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{
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param->depth = depth;
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}
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void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t)
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{
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param->check_time = t;
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param->flags |= X509_V_FLAG_USE_CHECK_TIME;
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}
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int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param, ASN1_OBJECT *policy)
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{
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if (!param->policies)
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{
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param->policies = sk_ASN1_OBJECT_new_null();
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if (!param->policies)
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return 0;
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}
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if (!sk_ASN1_OBJECT_push(param->policies, policy))
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return 0;
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return 1;
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}
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int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param,
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STACK_OF(ASN1_OBJECT) *policies)
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{
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int i;
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ASN1_OBJECT *oid, *doid;
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if (!param)
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return 0;
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if (param->policies)
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sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
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if (!policies)
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{
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param->policies = NULL;
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return 1;
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}
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param->policies = sk_ASN1_OBJECT_new_null();
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if (!param->policies)
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return 0;
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for (i = 0; i < sk_ASN1_OBJECT_num(policies); i++)
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{
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oid = sk_ASN1_OBJECT_value(policies, i);
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doid = OBJ_dup(oid);
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if (!doid)
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return 0;
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if (!sk_ASN1_OBJECT_push(param->policies, doid))
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{
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ASN1_OBJECT_free(doid);
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return 0;
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}
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}
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param->flags |= X509_V_FLAG_POLICY_CHECK;
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return 1;
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}
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int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param)
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{
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return param->depth;
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}
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/* Default verify parameters: these are used for various
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* applications and can be overridden by the user specified table.
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* NB: the 'name' field *must* be in alphabetical order because it
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* will be searched using OBJ_search.
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*/
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static const X509_VERIFY_PARAM default_table[] = {
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{
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"default", /* X509 default parameters */
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0, /* Check time */
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0, /* internal flags */
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0, /* flags */
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0, /* purpose */
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0, /* trust */
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9, /* depth */
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NULL /* policies */
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},
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{
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"pkcs7", /* SSL/TLS client parameters */
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0, /* Check time */
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0, /* internal flags */
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0, /* flags */
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X509_PURPOSE_SMIME_SIGN, /* purpose */
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X509_TRUST_EMAIL, /* trust */
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-1, /* depth */
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NULL /* policies */
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},
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{
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"ssl_client", /* SSL/TLS client parameters */
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0, /* Check time */
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0, /* internal flags */
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0, /* flags */
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X509_PURPOSE_SSL_CLIENT, /* purpose */
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X509_TRUST_SSL_CLIENT, /* trust */
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-1, /* depth */
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NULL /* policies */
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},
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{
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"ssl_server", /* SSL/TLS server parameters */
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0, /* Check time */
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0, /* internal flags */
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0, /* flags */
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X509_PURPOSE_SSL_SERVER, /* purpose */
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X509_TRUST_SSL_SERVER, /* trust */
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-1, /* depth */
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NULL /* policies */
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}};
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static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL;
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static int table_cmp(const void *pa, const void *pb)
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{
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const X509_VERIFY_PARAM *a = pa, *b = pb;
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return strcmp(a->name, b->name);
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}
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static int param_cmp(const X509_VERIFY_PARAM * const *a,
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const X509_VERIFY_PARAM * const *b)
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{
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return strcmp((*a)->name, (*b)->name);
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}
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int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param)
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{
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int idx;
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X509_VERIFY_PARAM *ptmp;
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if (!param_table)
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{
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param_table = sk_X509_VERIFY_PARAM_new(param_cmp);
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if (!param_table)
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return 0;
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}
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else
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{
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idx = sk_X509_VERIFY_PARAM_find(param_table, param);
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if (idx != -1)
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{
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ptmp = sk_X509_VERIFY_PARAM_value(param_table, idx);
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X509_VERIFY_PARAM_free(ptmp);
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sk_X509_VERIFY_PARAM_delete(param_table, idx);
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}
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}
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if (!sk_X509_VERIFY_PARAM_push(param_table, param))
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return 0;
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return 1;
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}
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const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name)
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{
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int idx;
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X509_VERIFY_PARAM pm;
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pm.name = (char *)name;
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if (param_table)
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{
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idx = sk_X509_VERIFY_PARAM_find(param_table, &pm);
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if (idx != -1)
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return sk_X509_VERIFY_PARAM_value(param_table, idx);
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}
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return (const X509_VERIFY_PARAM *) OBJ_bsearch((char *)&pm,
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(char *)&default_table,
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sizeof(default_table)/sizeof(X509_VERIFY_PARAM),
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sizeof(X509_VERIFY_PARAM),
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table_cmp);
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}
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void X509_VERIFY_PARAM_table_cleanup(void)
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{
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if (param_table)
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sk_X509_VERIFY_PARAM_pop_free(param_table,
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X509_VERIFY_PARAM_free);
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param_table = NULL;
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}
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