311d4992f2
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@21294 ec53bebd-3082-4978-b11e-865c3cabbd6b
2553 lines
58 KiB
C
2553 lines
58 KiB
C
/*
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* Copyright (c) 2004 - 2007 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* 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 the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "hx_locl.h"
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RCSID("$Id$");
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#include "crypto-headers.h"
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#include <rtbl.h>
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struct hx509_verify_ctx_data {
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hx509_certs trust_anchors;
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int flags;
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#define HX509_VERIFY_CTX_F_TIME_SET 1
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#define HX509_VERIFY_CTX_F_ALLOW_PROXY_CERTIFICATE 2
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#define HX509_VERIFY_CTX_F_REQUIRE_RFC3280 4
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#define HX509_VERIFY_CTX_F_CHECK_TRUST_ANCHORS 8
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#define HX509_VERIFY_CTX_F_NO_DEFAULT_ANCHORS 16
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time_t time_now;
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unsigned int max_depth;
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#define HX509_VERIFY_MAX_DEPTH 30
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hx509_revoke_ctx revoke_ctx;
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};
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#define REQUIRE_RFC3280(ctx) ((ctx)->flags & HX509_VERIFY_CTX_F_REQUIRE_RFC3280)
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#define CHECK_TA(ctx) ((ctx)->flags & HX509_VERIFY_CTX_F_CHECK_TRUST_ANCHORS)
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#define ALLOW_DEF_TA(ctx) (((ctx)->flags & HX509_VERIFY_CTX_F_NO_DEFAULT_ANCHORS) == 0)
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struct _hx509_cert_attrs {
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size_t len;
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hx509_cert_attribute *val;
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};
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struct hx509_cert_data {
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unsigned int ref;
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char *friendlyname;
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Certificate *data;
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hx509_private_key private_key;
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struct _hx509_cert_attrs attrs;
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hx509_name basename;
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_hx509_cert_release_func release;
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void *ctx;
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};
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typedef struct hx509_name_constraints {
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NameConstraints *val;
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size_t len;
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} hx509_name_constraints;
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#define GeneralSubtrees_SET(g,var) \
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(g)->len = (var)->len, (g)->val = (var)->val;
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/*
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*
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*/
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int
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hx509_context_init(hx509_context *context)
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{
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*context = calloc(1, sizeof(**context));
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if (*context == NULL)
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return ENOMEM;
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_hx509_ks_null_register(*context);
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_hx509_ks_mem_register(*context);
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_hx509_ks_file_register(*context);
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_hx509_ks_pkcs12_register(*context);
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_hx509_ks_pkcs11_register(*context);
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_hx509_ks_dir_register(*context);
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_hx509_ks_keychain_register(*context);
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ENGINE_add_conf_module();
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OpenSSL_add_all_algorithms();
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(*context)->ocsp_time_diff = HX509_DEFAULT_OCSP_TIME_DIFF;
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initialize_hx_error_table_r(&(*context)->et_list);
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initialize_asn1_error_table_r(&(*context)->et_list);
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#ifdef HX509_DEFAULT_ANCHORS
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(void)hx509_certs_init(*context, HX509_DEFAULT_ANCHORS, 0,
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NULL, &(*context)->default_trust_anchors);
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#endif
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return 0;
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}
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void
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hx509_context_set_missing_revoke(hx509_context context, int flag)
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{
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if (flag)
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context->flags |= HX509_CTX_VERIFY_MISSING_OK;
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else
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context->flags &= ~HX509_CTX_VERIFY_MISSING_OK;
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}
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void
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hx509_context_free(hx509_context *context)
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{
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hx509_clear_error_string(*context);
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if ((*context)->ks_ops) {
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free((*context)->ks_ops);
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(*context)->ks_ops = NULL;
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}
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(*context)->ks_num_ops = 0;
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free_error_table ((*context)->et_list);
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if ((*context)->querystat)
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free((*context)->querystat);
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memset(*context, 0, sizeof(**context));
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free(*context);
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*context = NULL;
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}
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/*
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*
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*/
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Certificate *
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_hx509_get_cert(hx509_cert cert)
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{
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return cert->data;
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}
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/*
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*
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*/
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#if 0
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void
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_hx509_print_cert_subject(hx509_cert cert)
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{
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char *subject_name;
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hx509_name name;
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int ret;
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ret = hx509_cert_get_subject(cert, &name);
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if (ret)
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abort();
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ret = hx509_name_to_string(name, &subject_name);
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hx509_name_free(&name);
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if (ret)
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abort();
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printf("name: %s\n", subject_name);
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free(subject_name);
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}
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#endif
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/*
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*
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*/
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int
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_hx509_cert_get_version(const Certificate *t)
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{
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return t->tbsCertificate.version ? *t->tbsCertificate.version + 1 : 1;
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}
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int
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hx509_cert_init(hx509_context context, const Certificate *c, hx509_cert *cert)
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{
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int ret;
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*cert = malloc(sizeof(**cert));
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if (*cert == NULL)
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return ENOMEM;
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(*cert)->ref = 1;
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(*cert)->friendlyname = NULL;
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(*cert)->attrs.len = 0;
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(*cert)->attrs.val = NULL;
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(*cert)->private_key = NULL;
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(*cert)->basename = NULL;
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(*cert)->release = NULL;
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(*cert)->ctx = NULL;
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(*cert)->data = calloc(1, sizeof(*(*cert)->data));
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if ((*cert)->data == NULL) {
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free(*cert);
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return ENOMEM;
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}
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ret = copy_Certificate(c, (*cert)->data);
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if (ret) {
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free((*cert)->data);
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free(*cert);
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*cert = NULL;
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}
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return ret;
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}
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int
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hx509_cert_init_data(hx509_context context,
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const void *ptr,
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size_t len,
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hx509_cert *cert)
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{
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Certificate t;
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size_t size;
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int ret;
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ret = decode_Certificate(ptr, len, &t, &size);
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if (ret) {
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hx509_set_error_string(context, 0, ret, "Failed to decode certificate");
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return ret;
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}
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if (size != len) {
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hx509_set_error_string(context, 0, HX509_EXTRA_DATA_AFTER_STRUCTURE,
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"Extra data after certificate");
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return HX509_EXTRA_DATA_AFTER_STRUCTURE;
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}
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ret = hx509_cert_init(context, &t, cert);
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free_Certificate(&t);
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return ret;
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}
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void
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_hx509_cert_set_release(hx509_cert cert,
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_hx509_cert_release_func release,
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void *ctx)
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{
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cert->release = release;
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cert->ctx = ctx;
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}
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/* Doesn't make a copy of `private_key'. */
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int
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_hx509_cert_assign_key(hx509_cert cert, hx509_private_key private_key)
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{
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if (cert->private_key)
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_hx509_private_key_free(&cert->private_key);
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cert->private_key = _hx509_private_key_ref(private_key);
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return 0;
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}
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void
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hx509_cert_free(hx509_cert cert)
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{
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int i;
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if (cert == NULL)
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return;
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if (cert->ref <= 0)
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_hx509_abort("refcount <= 0");
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if (--cert->ref > 0)
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return;
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if (cert->release)
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(cert->release)(cert, cert->ctx);
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if (cert->private_key)
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_hx509_private_key_free(&cert->private_key);
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free_Certificate(cert->data);
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free(cert->data);
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for (i = 0; i < cert->attrs.len; i++) {
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der_free_octet_string(&cert->attrs.val[i]->data);
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der_free_oid(&cert->attrs.val[i]->oid);
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free(cert->attrs.val[i]);
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}
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free(cert->attrs.val);
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free(cert->friendlyname);
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if (cert->basename)
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hx509_name_free(&cert->basename);
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memset(cert, 0, sizeof(cert));
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free(cert);
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}
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hx509_cert
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hx509_cert_ref(hx509_cert cert)
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{
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if (cert->ref <= 0)
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_hx509_abort("cert refcount <= 0");
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cert->ref++;
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if (cert->ref == 0)
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_hx509_abort("cert refcount == 0");
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return cert;
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}
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int
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hx509_verify_init_ctx(hx509_context context, hx509_verify_ctx *ctx)
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{
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hx509_verify_ctx c;
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c = calloc(1, sizeof(*c));
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if (c == NULL)
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return ENOMEM;
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c->max_depth = HX509_VERIFY_MAX_DEPTH;
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*ctx = c;
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return 0;
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}
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void
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hx509_verify_destroy_ctx(hx509_verify_ctx ctx)
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{
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if (ctx)
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memset(ctx, 0, sizeof(*ctx));
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free(ctx);
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}
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void
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hx509_verify_attach_anchors(hx509_verify_ctx ctx, hx509_certs set)
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{
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ctx->trust_anchors = set;
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}
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void
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hx509_verify_attach_revoke(hx509_verify_ctx ctx, hx509_revoke_ctx revoke_ctx)
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{
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ctx->revoke_ctx = revoke_ctx;
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}
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void
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hx509_verify_set_time(hx509_verify_ctx ctx, time_t t)
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{
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ctx->flags |= HX509_VERIFY_CTX_F_TIME_SET;
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ctx->time_now = t;
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}
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void
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hx509_verify_set_max_depth(hx509_verify_ctx ctx, unsigned int max_depth)
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{
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ctx->max_depth = max_depth;
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}
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void
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hx509_verify_set_proxy_certificate(hx509_verify_ctx ctx, int boolean)
|
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{
|
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if (boolean)
|
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ctx->flags |= HX509_VERIFY_CTX_F_ALLOW_PROXY_CERTIFICATE;
|
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else
|
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ctx->flags &= ~HX509_VERIFY_CTX_F_ALLOW_PROXY_CERTIFICATE;
|
||
}
|
||
|
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void
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hx509_verify_set_strict_rfc3280_verification(hx509_verify_ctx ctx, int boolean)
|
||
{
|
||
if (boolean)
|
||
ctx->flags |= HX509_VERIFY_CTX_F_REQUIRE_RFC3280;
|
||
else
|
||
ctx->flags &= ~HX509_VERIFY_CTX_F_REQUIRE_RFC3280;
|
||
}
|
||
|
||
void
|
||
hx509_verify_ctx_f_allow_default_trustanchors(hx509_verify_ctx ctx, int boolean)
|
||
{
|
||
if (boolean)
|
||
ctx->flags &= ~HX509_VERIFY_CTX_F_NO_DEFAULT_ANCHORS;
|
||
else
|
||
ctx->flags |= HX509_VERIFY_CTX_F_NO_DEFAULT_ANCHORS;
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||
}
|
||
|
||
static const Extension *
|
||
find_extension(const Certificate *cert, const heim_oid *oid, int *idx)
|
||
{
|
||
const TBSCertificate *c = &cert->tbsCertificate;
|
||
|
||
if (c->version == NULL || *c->version < 2 || c->extensions == NULL)
|
||
return NULL;
|
||
|
||
for (;*idx < c->extensions->len; (*idx)++) {
|
||
if (der_heim_oid_cmp(&c->extensions->val[*idx].extnID, oid) == 0)
|
||
return &c->extensions->val[(*idx)++];
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
static int
|
||
find_extension_auth_key_id(const Certificate *subject,
|
||
AuthorityKeyIdentifier *ai)
|
||
{
|
||
const Extension *e;
|
||
size_t size;
|
||
int i = 0;
|
||
|
||
memset(ai, 0, sizeof(*ai));
|
||
|
||
e = find_extension(subject, oid_id_x509_ce_authorityKeyIdentifier(), &i);
|
||
if (e == NULL)
|
||
return HX509_EXTENSION_NOT_FOUND;
|
||
|
||
return decode_AuthorityKeyIdentifier(e->extnValue.data,
|
||
e->extnValue.length,
|
||
ai, &size);
|
||
}
|
||
|
||
int
|
||
_hx509_find_extension_subject_key_id(const Certificate *issuer,
|
||
SubjectKeyIdentifier *si)
|
||
{
|
||
const Extension *e;
|
||
size_t size;
|
||
int i = 0;
|
||
|
||
memset(si, 0, sizeof(*si));
|
||
|
||
e = find_extension(issuer, oid_id_x509_ce_subjectKeyIdentifier(), &i);
|
||
if (e == NULL)
|
||
return HX509_EXTENSION_NOT_FOUND;
|
||
|
||
return decode_SubjectKeyIdentifier(e->extnValue.data,
|
||
e->extnValue.length,
|
||
si, &size);
|
||
}
|
||
|
||
static int
|
||
find_extension_name_constraints(const Certificate *subject,
|
||
NameConstraints *nc)
|
||
{
|
||
const Extension *e;
|
||
size_t size;
|
||
int i = 0;
|
||
|
||
memset(nc, 0, sizeof(*nc));
|
||
|
||
e = find_extension(subject, oid_id_x509_ce_nameConstraints(), &i);
|
||
if (e == NULL)
|
||
return HX509_EXTENSION_NOT_FOUND;
|
||
|
||
return decode_NameConstraints(e->extnValue.data,
|
||
e->extnValue.length,
|
||
nc, &size);
|
||
}
|
||
|
||
static int
|
||
find_extension_subject_alt_name(const Certificate *cert, int *i,
|
||
GeneralNames *sa)
|
||
{
|
||
const Extension *e;
|
||
size_t size;
|
||
|
||
memset(sa, 0, sizeof(*sa));
|
||
|
||
e = find_extension(cert, oid_id_x509_ce_subjectAltName(), i);
|
||
if (e == NULL)
|
||
return HX509_EXTENSION_NOT_FOUND;
|
||
|
||
return decode_GeneralNames(e->extnValue.data,
|
||
e->extnValue.length,
|
||
sa, &size);
|
||
}
|
||
|
||
static int
|
||
find_extension_eku(const Certificate *cert, ExtKeyUsage *eku)
|
||
{
|
||
const Extension *e;
|
||
size_t size;
|
||
int i = 0;
|
||
|
||
memset(eku, 0, sizeof(*eku));
|
||
|
||
e = find_extension(cert, oid_id_x509_ce_extKeyUsage(), &i);
|
||
if (e == NULL)
|
||
return HX509_EXTENSION_NOT_FOUND;
|
||
|
||
return decode_ExtKeyUsage(e->extnValue.data,
|
||
e->extnValue.length,
|
||
eku, &size);
|
||
}
|
||
|
||
static int
|
||
add_to_list(hx509_octet_string_list *list, const heim_octet_string *entry)
|
||
{
|
||
void *p;
|
||
int ret;
|
||
|
||
p = realloc(list->val, (list->len + 1) * sizeof(list->val[0]));
|
||
if (p == NULL)
|
||
return ENOMEM;
|
||
list->val = p;
|
||
ret = der_copy_octet_string(entry, &list->val[list->len]);
|
||
if (ret)
|
||
return ret;
|
||
list->len++;
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
hx509_free_octet_string_list(hx509_octet_string_list *list)
|
||
{
|
||
int i;
|
||
for (i = 0; i < list->len; i++)
|
||
der_free_octet_string(&list->val[i]);
|
||
free(list->val);
|
||
list->val = NULL;
|
||
list->len = 0;
|
||
}
|
||
|
||
int
|
||
hx509_cert_find_subjectAltName_otherName(hx509_cert cert,
|
||
const heim_oid *oid,
|
||
hx509_octet_string_list *list)
|
||
{
|
||
GeneralNames sa;
|
||
int ret, i, j;
|
||
|
||
list->val = NULL;
|
||
list->len = 0;
|
||
|
||
i = 0;
|
||
while (1) {
|
||
ret = find_extension_subject_alt_name(_hx509_get_cert(cert), &i, &sa);
|
||
i++;
|
||
if (ret == HX509_EXTENSION_NOT_FOUND) {
|
||
ret = 0;
|
||
break;
|
||
} else if (ret != 0)
|
||
break;
|
||
|
||
|
||
for (j = 0; j < sa.len; j++) {
|
||
if (sa.val[j].element == choice_GeneralName_otherName &&
|
||
der_heim_oid_cmp(&sa.val[j].u.otherName.type_id, oid) == 0)
|
||
{
|
||
ret = add_to_list(list, &sa.val[j].u.otherName.value);
|
||
if (ret) {
|
||
free_GeneralNames(&sa);
|
||
return ret;
|
||
}
|
||
}
|
||
}
|
||
free_GeneralNames(&sa);
|
||
}
|
||
return ret;
|
||
}
|
||
|
||
|
||
static int
|
||
check_key_usage(hx509_context context, const Certificate *cert,
|
||
unsigned flags, int req_present)
|
||
{
|
||
const Extension *e;
|
||
KeyUsage ku;
|
||
size_t size;
|
||
int ret, i = 0;
|
||
unsigned ku_flags;
|
||
|
||
if (_hx509_cert_get_version(cert) < 3)
|
||
return 0;
|
||
|
||
e = find_extension(cert, oid_id_x509_ce_keyUsage(), &i);
|
||
if (e == NULL) {
|
||
if (req_present) {
|
||
hx509_set_error_string(context, 0, HX509_KU_CERT_MISSING,
|
||
"Required extension key "
|
||
"usage missing from certifiate");
|
||
return HX509_KU_CERT_MISSING;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
ret = decode_KeyUsage(e->extnValue.data, e->extnValue.length, &ku, &size);
|
||
if (ret)
|
||
return ret;
|
||
ku_flags = KeyUsage2int(ku);
|
||
if ((ku_flags & flags) != flags) {
|
||
unsigned missing = (~ku_flags) & flags;
|
||
char buf[256], *name;
|
||
|
||
unparse_flags(missing, asn1_KeyUsage_units(), buf, sizeof(buf));
|
||
_hx509_unparse_Name(&cert->tbsCertificate.subject, &name);
|
||
hx509_set_error_string(context, 0, HX509_KU_CERT_MISSING,
|
||
"Key usage %s required but missing "
|
||
"from certifiate %s", buf, name);
|
||
free(name);
|
||
return HX509_KU_CERT_MISSING;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
_hx509_check_key_usage(hx509_context context, hx509_cert cert,
|
||
unsigned flags, int req_present)
|
||
{
|
||
return check_key_usage(context, _hx509_get_cert(cert), flags, req_present);
|
||
}
|
||
|
||
enum certtype { PROXY_CERT, EE_CERT, CA_CERT };
|
||
|
||
static int
|
||
check_basic_constraints(hx509_context context, const Certificate *cert,
|
||
enum certtype type, int depth)
|
||
{
|
||
BasicConstraints bc;
|
||
const Extension *e;
|
||
size_t size;
|
||
int ret, i = 0;
|
||
|
||
if (_hx509_cert_get_version(cert) < 3)
|
||
return 0;
|
||
|
||
e = find_extension(cert, oid_id_x509_ce_basicConstraints(), &i);
|
||
if (e == NULL) {
|
||
switch(type) {
|
||
case PROXY_CERT:
|
||
case EE_CERT:
|
||
return 0;
|
||
case CA_CERT: {
|
||
char *name;
|
||
ret = _hx509_unparse_Name(&cert->tbsCertificate.subject, &name);
|
||
assert(ret == 0);
|
||
hx509_set_error_string(context, 0, HX509_EXTENSION_NOT_FOUND,
|
||
"basicConstraints missing from "
|
||
"CA certifiacte %s", name);
|
||
free(name);
|
||
return HX509_EXTENSION_NOT_FOUND;
|
||
}
|
||
}
|
||
}
|
||
|
||
ret = decode_BasicConstraints(e->extnValue.data,
|
||
e->extnValue.length, &bc,
|
||
&size);
|
||
if (ret)
|
||
return ret;
|
||
switch(type) {
|
||
case PROXY_CERT:
|
||
if (bc.cA != NULL && *bc.cA)
|
||
ret = HX509_PARENT_IS_CA;
|
||
break;
|
||
case EE_CERT:
|
||
ret = 0;
|
||
break;
|
||
case CA_CERT:
|
||
if (bc.cA == NULL || !*bc.cA)
|
||
ret = HX509_PARENT_NOT_CA;
|
||
else if (bc.pathLenConstraint)
|
||
if (depth - 1 > *bc.pathLenConstraint)
|
||
ret = HX509_CA_PATH_TOO_DEEP;
|
||
break;
|
||
}
|
||
free_BasicConstraints(&bc);
|
||
return ret;
|
||
}
|
||
|
||
int
|
||
_hx509_cert_is_parent_cmp(const Certificate *subject,
|
||
const Certificate *issuer,
|
||
int allow_self_signed)
|
||
{
|
||
int diff;
|
||
AuthorityKeyIdentifier ai;
|
||
SubjectKeyIdentifier si;
|
||
int ret_ai, ret_si;
|
||
|
||
diff = _hx509_name_cmp(&issuer->tbsCertificate.subject,
|
||
&subject->tbsCertificate.issuer);
|
||
if (diff)
|
||
return diff;
|
||
|
||
memset(&ai, 0, sizeof(ai));
|
||
memset(&si, 0, sizeof(si));
|
||
|
||
/*
|
||
* Try to find AuthorityKeyIdentifier, if its not present in the
|
||
* subject certificate nor the parent.
|
||
*/
|
||
|
||
ret_ai = find_extension_auth_key_id(subject, &ai);
|
||
if (ret_ai && ret_ai != HX509_EXTENSION_NOT_FOUND)
|
||
return 1;
|
||
ret_si = _hx509_find_extension_subject_key_id(issuer, &si);
|
||
if (ret_si && ret_si != HX509_EXTENSION_NOT_FOUND)
|
||
return -1;
|
||
|
||
if (ret_si && ret_ai)
|
||
goto out;
|
||
if (ret_ai)
|
||
goto out;
|
||
if (ret_si) {
|
||
if (allow_self_signed) {
|
||
diff = 0;
|
||
goto out;
|
||
} else if (ai.keyIdentifier) {
|
||
diff = -1;
|
||
goto out;
|
||
}
|
||
}
|
||
|
||
if (ai.keyIdentifier == NULL) {
|
||
Name name;
|
||
|
||
if (ai.authorityCertIssuer == NULL)
|
||
return -1;
|
||
if (ai.authorityCertSerialNumber == NULL)
|
||
return -1;
|
||
|
||
diff = der_heim_integer_cmp(ai.authorityCertSerialNumber,
|
||
&issuer->tbsCertificate.serialNumber);
|
||
if (diff)
|
||
return diff;
|
||
if (ai.authorityCertIssuer->len != 1)
|
||
return -1;
|
||
if (ai.authorityCertIssuer->val[0].element != choice_GeneralName_directoryName)
|
||
return -1;
|
||
|
||
name.element =
|
||
ai.authorityCertIssuer->val[0].u.directoryName.element;
|
||
name.u.rdnSequence =
|
||
ai.authorityCertIssuer->val[0].u.directoryName.u.rdnSequence;
|
||
|
||
diff = _hx509_name_cmp(&issuer->tbsCertificate.subject,
|
||
&name);
|
||
if (diff)
|
||
return diff;
|
||
diff = 0;
|
||
} else
|
||
diff = der_heim_octet_string_cmp(ai.keyIdentifier, &si);
|
||
if (diff)
|
||
goto out;
|
||
|
||
out:
|
||
free_AuthorityKeyIdentifier(&ai);
|
||
free_SubjectKeyIdentifier(&si);
|
||
return diff;
|
||
}
|
||
|
||
static int
|
||
certificate_is_anchor(hx509_context context,
|
||
hx509_certs trust_anchors,
|
||
const hx509_cert cert)
|
||
{
|
||
hx509_query q;
|
||
hx509_cert c;
|
||
int ret;
|
||
|
||
if (trust_anchors == NULL)
|
||
return 0;
|
||
|
||
_hx509_query_clear(&q);
|
||
|
||
q.match = HX509_QUERY_MATCH_CERTIFICATE;
|
||
q.certificate = _hx509_get_cert(cert);
|
||
|
||
ret = hx509_certs_find(context, trust_anchors, &q, &c);
|
||
if (ret == 0)
|
||
hx509_cert_free(c);
|
||
return ret == 0;
|
||
}
|
||
|
||
static int
|
||
certificate_is_self_signed(const Certificate *cert)
|
||
{
|
||
return _hx509_cert_is_parent_cmp(cert, cert, 1) == 0;
|
||
}
|
||
|
||
/*
|
||
* The subjectName is "null" when its empty set of relative DBs.
|
||
*/
|
||
|
||
static int
|
||
subject_null_p(const Certificate *c)
|
||
{
|
||
return c->tbsCertificate.subject.u.rdnSequence.len == 0;
|
||
}
|
||
|
||
|
||
static int
|
||
find_parent(hx509_context context,
|
||
time_t time_now,
|
||
hx509_certs trust_anchors,
|
||
hx509_path *path,
|
||
hx509_certs pool,
|
||
hx509_cert current,
|
||
hx509_cert *parent)
|
||
{
|
||
AuthorityKeyIdentifier ai;
|
||
hx509_query q;
|
||
int ret;
|
||
|
||
*parent = NULL;
|
||
memset(&ai, 0, sizeof(ai));
|
||
|
||
_hx509_query_clear(&q);
|
||
|
||
if (!subject_null_p(current->data)) {
|
||
q.match |= HX509_QUERY_FIND_ISSUER_CERT;
|
||
q.subject = _hx509_get_cert(current);
|
||
} else {
|
||
ret = find_extension_auth_key_id(current->data, &ai);
|
||
if (ret) {
|
||
hx509_set_error_string(context, 0, HX509_CERTIFICATE_MALFORMED,
|
||
"Subjectless certificate missing AuthKeyID");
|
||
return HX509_CERTIFICATE_MALFORMED;
|
||
}
|
||
|
||
if (ai.keyIdentifier == NULL) {
|
||
free_AuthorityKeyIdentifier(&ai);
|
||
hx509_set_error_string(context, 0, HX509_CERTIFICATE_MALFORMED,
|
||
"Subjectless certificate missing keyIdentifier "
|
||
"inside AuthKeyID");
|
||
return HX509_CERTIFICATE_MALFORMED;
|
||
}
|
||
|
||
q.subject_id = ai.keyIdentifier;
|
||
q.match = HX509_QUERY_MATCH_SUBJECT_KEY_ID;
|
||
}
|
||
|
||
q.path = path;
|
||
q.match |= HX509_QUERY_NO_MATCH_PATH;
|
||
|
||
if (pool) {
|
||
q.timenow = time_now;
|
||
q.match |= HX509_QUERY_MATCH_TIME;
|
||
|
||
ret = hx509_certs_find(context, pool, &q, parent);
|
||
if (ret == 0) {
|
||
free_AuthorityKeyIdentifier(&ai);
|
||
return 0;
|
||
}
|
||
q.match &= ~HX509_QUERY_MATCH_TIME;
|
||
}
|
||
|
||
if (trust_anchors) {
|
||
ret = hx509_certs_find(context, trust_anchors, &q, parent);
|
||
if (ret == 0) {
|
||
free_AuthorityKeyIdentifier(&ai);
|
||
return ret;
|
||
}
|
||
}
|
||
free_AuthorityKeyIdentifier(&ai);
|
||
|
||
{
|
||
hx509_name name;
|
||
char *str;
|
||
|
||
ret = hx509_cert_get_subject(current, &name);
|
||
if (ret) {
|
||
hx509_clear_error_string(context);
|
||
return HX509_ISSUER_NOT_FOUND;
|
||
}
|
||
ret = hx509_name_to_string(name, &str);
|
||
hx509_name_free(&name);
|
||
if (ret) {
|
||
hx509_clear_error_string(context);
|
||
return HX509_ISSUER_NOT_FOUND;
|
||
}
|
||
|
||
hx509_set_error_string(context, 0, HX509_ISSUER_NOT_FOUND,
|
||
"Failed to find issuer for "
|
||
"certificate with subject: '%s'", str);
|
||
free(str);
|
||
}
|
||
return HX509_ISSUER_NOT_FOUND;
|
||
}
|
||
|
||
/*
|
||
*
|
||
*/
|
||
|
||
static int
|
||
is_proxy_cert(hx509_context context,
|
||
const Certificate *cert,
|
||
ProxyCertInfo *rinfo)
|
||
{
|
||
ProxyCertInfo info;
|
||
const Extension *e;
|
||
size_t size;
|
||
int ret, i = 0;
|
||
|
||
if (rinfo)
|
||
memset(rinfo, 0, sizeof(*rinfo));
|
||
|
||
e = find_extension(cert, oid_id_pe_proxyCertInfo(), &i);
|
||
if (e == NULL) {
|
||
hx509_clear_error_string(context);
|
||
return HX509_EXTENSION_NOT_FOUND;
|
||
}
|
||
|
||
ret = decode_ProxyCertInfo(e->extnValue.data,
|
||
e->extnValue.length,
|
||
&info,
|
||
&size);
|
||
if (ret) {
|
||
hx509_clear_error_string(context);
|
||
return ret;
|
||
}
|
||
if (size != e->extnValue.length) {
|
||
free_ProxyCertInfo(&info);
|
||
hx509_clear_error_string(context);
|
||
return HX509_EXTRA_DATA_AFTER_STRUCTURE;
|
||
}
|
||
if (rinfo == NULL)
|
||
free_ProxyCertInfo(&info);
|
||
else
|
||
*rinfo = info;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* Path operations are like MEMORY based keyset, but with exposed
|
||
* internal so we can do easy searches.
|
||
*/
|
||
|
||
int
|
||
_hx509_path_append(hx509_context context, hx509_path *path, hx509_cert cert)
|
||
{
|
||
hx509_cert *val;
|
||
val = realloc(path->val, (path->len + 1) * sizeof(path->val[0]));
|
||
if (val == NULL) {
|
||
hx509_set_error_string(context, 0, ENOMEM, "out of memory");
|
||
return ENOMEM;
|
||
}
|
||
|
||
path->val = val;
|
||
path->val[path->len] = hx509_cert_ref(cert);
|
||
path->len++;
|
||
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
_hx509_path_free(hx509_path *path)
|
||
{
|
||
unsigned i;
|
||
|
||
for (i = 0; i < path->len; i++)
|
||
hx509_cert_free(path->val[i]);
|
||
free(path->val);
|
||
path->val = NULL;
|
||
path->len = 0;
|
||
}
|
||
|
||
/*
|
||
* Find path by looking up issuer for the top certificate and continue
|
||
* until an anchor certificate is found or max limit is found. A
|
||
* certificate never included twice in the path.
|
||
*
|
||
* If the trust anchors are not given, calculate optimistic path, just
|
||
* follow the chain upward until we no longer find a parent or we hit
|
||
* the max path limit. In this case, a failure will always be returned
|
||
* depending on what error condition is hit first.
|
||
*
|
||
* The path includes a path from the top certificate to the anchor
|
||
* certificate.
|
||
*
|
||
* The caller needs to free `path´ both on successful built path and
|
||
* failure.
|
||
*/
|
||
|
||
int
|
||
_hx509_calculate_path(hx509_context context,
|
||
int flags,
|
||
time_t time_now,
|
||
hx509_certs anchors,
|
||
unsigned int max_depth,
|
||
hx509_cert cert,
|
||
hx509_certs pool,
|
||
hx509_path *path)
|
||
{
|
||
hx509_cert parent, current;
|
||
int ret;
|
||
|
||
if (max_depth == 0)
|
||
max_depth = HX509_VERIFY_MAX_DEPTH;
|
||
|
||
ret = _hx509_path_append(context, path, cert);
|
||
if (ret)
|
||
return ret;
|
||
|
||
current = hx509_cert_ref(cert);
|
||
|
||
while (!certificate_is_anchor(context, anchors, current)) {
|
||
|
||
ret = find_parent(context, time_now, anchors, path,
|
||
pool, current, &parent);
|
||
hx509_cert_free(current);
|
||
if (ret)
|
||
return ret;
|
||
|
||
ret = _hx509_path_append(context, path, parent);
|
||
if (ret)
|
||
return ret;
|
||
current = parent;
|
||
|
||
if (path->len > max_depth) {
|
||
hx509_cert_free(current);
|
||
hx509_set_error_string(context, 0, HX509_PATH_TOO_LONG,
|
||
"Path too long while bulding "
|
||
"certificate chain");
|
||
return HX509_PATH_TOO_LONG;
|
||
}
|
||
}
|
||
|
||
if ((flags & HX509_CALCULATE_PATH_NO_ANCHOR) &&
|
||
path->len > 0 &&
|
||
certificate_is_anchor(context, anchors, path->val[path->len - 1]))
|
||
{
|
||
hx509_cert_free(path->val[path->len - 1]);
|
||
path->len--;
|
||
}
|
||
|
||
hx509_cert_free(current);
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
AlgorithmIdentifier_cmp(const AlgorithmIdentifier *p,
|
||
const AlgorithmIdentifier *q)
|
||
{
|
||
int diff;
|
||
diff = der_heim_oid_cmp(&p->algorithm, &q->algorithm);
|
||
if (diff)
|
||
return diff;
|
||
if (p->parameters) {
|
||
if (q->parameters)
|
||
return heim_any_cmp(p->parameters,
|
||
q->parameters);
|
||
else
|
||
return 1;
|
||
} else {
|
||
if (q->parameters)
|
||
return -1;
|
||
else
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
int
|
||
_hx509_Certificate_cmp(const Certificate *p, const Certificate *q)
|
||
{
|
||
int diff;
|
||
diff = der_heim_bit_string_cmp(&p->signatureValue, &q->signatureValue);
|
||
if (diff)
|
||
return diff;
|
||
diff = AlgorithmIdentifier_cmp(&p->signatureAlgorithm,
|
||
&q->signatureAlgorithm);
|
||
if (diff)
|
||
return diff;
|
||
diff = der_heim_octet_string_cmp(&p->tbsCertificate._save,
|
||
&q->tbsCertificate._save);
|
||
return diff;
|
||
}
|
||
|
||
int
|
||
hx509_cert_cmp(hx509_cert p, hx509_cert q)
|
||
{
|
||
return _hx509_Certificate_cmp(p->data, q->data);
|
||
}
|
||
|
||
int
|
||
hx509_cert_get_issuer(hx509_cert p, hx509_name *name)
|
||
{
|
||
return _hx509_name_from_Name(&p->data->tbsCertificate.issuer, name);
|
||
}
|
||
|
||
int
|
||
hx509_cert_get_subject(hx509_cert p, hx509_name *name)
|
||
{
|
||
return _hx509_name_from_Name(&p->data->tbsCertificate.subject, name);
|
||
}
|
||
|
||
int
|
||
hx509_cert_get_base_subject(hx509_context context, hx509_cert c,
|
||
hx509_name *name)
|
||
{
|
||
if (c->basename)
|
||
return hx509_name_copy(context, c->basename, name);
|
||
if (is_proxy_cert(context, c->data, NULL) == 0) {
|
||
int ret = HX509_PROXY_CERTIFICATE_NOT_CANONICALIZED;
|
||
hx509_set_error_string(context, 0, ret,
|
||
"Proxy certificate have not been "
|
||
"canonicalize yet, no base name");
|
||
return ret;
|
||
}
|
||
return _hx509_name_from_Name(&c->data->tbsCertificate.subject, name);
|
||
}
|
||
|
||
int
|
||
hx509_cert_get_serialnumber(hx509_cert p, heim_integer *i)
|
||
{
|
||
return der_copy_heim_integer(&p->data->tbsCertificate.serialNumber, i);
|
||
}
|
||
|
||
time_t
|
||
hx509_cert_get_notBefore(hx509_cert p)
|
||
{
|
||
return _hx509_Time2time_t(&p->data->tbsCertificate.validity.notBefore);
|
||
}
|
||
|
||
time_t
|
||
hx509_cert_get_notAfter(hx509_cert p)
|
||
{
|
||
return _hx509_Time2time_t(&p->data->tbsCertificate.validity.notAfter);
|
||
}
|
||
|
||
int
|
||
hx509_cert_get_SPKI(hx509_cert p, SubjectPublicKeyInfo *spki)
|
||
{
|
||
return copy_SubjectPublicKeyInfo(&p->data->tbsCertificate.subjectPublicKeyInfo,
|
||
spki);
|
||
}
|
||
|
||
hx509_private_key
|
||
_hx509_cert_private_key(hx509_cert p)
|
||
{
|
||
return p->private_key;
|
||
}
|
||
|
||
int
|
||
_hx509_cert_private_key_exportable(hx509_cert p)
|
||
{
|
||
if (p->private_key == NULL)
|
||
return 0;
|
||
return _hx509_private_key_exportable(p->private_key);
|
||
}
|
||
|
||
int
|
||
_hx509_cert_private_decrypt(hx509_context context,
|
||
const heim_octet_string *ciphertext,
|
||
const heim_oid *encryption_oid,
|
||
hx509_cert p,
|
||
heim_octet_string *cleartext)
|
||
{
|
||
cleartext->data = NULL;
|
||
cleartext->length = 0;
|
||
|
||
if (p->private_key == NULL) {
|
||
hx509_set_error_string(context, 0, HX509_PRIVATE_KEY_MISSING,
|
||
"Private key missing");
|
||
return HX509_PRIVATE_KEY_MISSING;
|
||
}
|
||
|
||
return _hx509_private_key_private_decrypt(context,
|
||
ciphertext,
|
||
encryption_oid,
|
||
p->private_key,
|
||
cleartext);
|
||
}
|
||
|
||
int
|
||
_hx509_cert_public_encrypt(hx509_context context,
|
||
const heim_octet_string *cleartext,
|
||
const hx509_cert p,
|
||
heim_oid *encryption_oid,
|
||
heim_octet_string *ciphertext)
|
||
{
|
||
return _hx509_public_encrypt(context,
|
||
cleartext, p->data,
|
||
encryption_oid, ciphertext);
|
||
}
|
||
|
||
/*
|
||
*
|
||
*/
|
||
|
||
time_t
|
||
_hx509_Time2time_t(const Time *t)
|
||
{
|
||
switch(t->element) {
|
||
case choice_Time_utcTime:
|
||
return t->u.utcTime;
|
||
case choice_Time_generalTime:
|
||
return t->u.generalTime;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
*
|
||
*/
|
||
|
||
static int
|
||
init_name_constraints(hx509_name_constraints *nc)
|
||
{
|
||
memset(nc, 0, sizeof(*nc));
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
add_name_constraints(hx509_context context, const Certificate *c, int not_ca,
|
||
hx509_name_constraints *nc)
|
||
{
|
||
NameConstraints tnc;
|
||
int ret;
|
||
|
||
ret = find_extension_name_constraints(c, &tnc);
|
||
if (ret == HX509_EXTENSION_NOT_FOUND)
|
||
return 0;
|
||
else if (ret) {
|
||
hx509_set_error_string(context, 0, ret, "Failed getting NameConstraints");
|
||
return ret;
|
||
} else if (not_ca) {
|
||
ret = HX509_VERIFY_CONSTRAINTS;
|
||
hx509_set_error_string(context, 0, ret, "Not a CA and "
|
||
"have NameConstraints");
|
||
} else {
|
||
NameConstraints *val;
|
||
val = realloc(nc->val, sizeof(nc->val[0]) * (nc->len + 1));
|
||
if (val == NULL) {
|
||
hx509_clear_error_string(context);
|
||
ret = ENOMEM;
|
||
goto out;
|
||
}
|
||
nc->val = val;
|
||
ret = copy_NameConstraints(&tnc, &nc->val[nc->len]);
|
||
if (ret) {
|
||
hx509_clear_error_string(context);
|
||
goto out;
|
||
}
|
||
nc->len += 1;
|
||
}
|
||
out:
|
||
free_NameConstraints(&tnc);
|
||
return ret;
|
||
}
|
||
|
||
static int
|
||
match_RDN(const RelativeDistinguishedName *c,
|
||
const RelativeDistinguishedName *n)
|
||
{
|
||
int i;
|
||
|
||
if (c->len != n->len)
|
||
return HX509_NAME_CONSTRAINT_ERROR;
|
||
|
||
for (i = 0; i < n->len; i++) {
|
||
if (der_heim_oid_cmp(&c->val[i].type, &n->val[i].type) != 0)
|
||
return HX509_NAME_CONSTRAINT_ERROR;
|
||
if (_hx509_name_ds_cmp(&c->val[i].value, &n->val[i].value) != 0)
|
||
return HX509_NAME_CONSTRAINT_ERROR;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
match_X501Name(const Name *c, const Name *n)
|
||
{
|
||
int i, ret;
|
||
|
||
if (c->element != choice_Name_rdnSequence
|
||
|| n->element != choice_Name_rdnSequence)
|
||
return 0;
|
||
if (c->u.rdnSequence.len > n->u.rdnSequence.len)
|
||
return HX509_NAME_CONSTRAINT_ERROR;
|
||
for (i = 0; i < c->u.rdnSequence.len; i++) {
|
||
ret = match_RDN(&c->u.rdnSequence.val[i], &n->u.rdnSequence.val[i]);
|
||
if (ret)
|
||
return ret;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
|
||
static int
|
||
match_general_name(const GeneralName *c, const GeneralName *n, int *match)
|
||
{
|
||
/*
|
||
* Name constraints only apply to the same name type, see RFC3280,
|
||
* 4.2.1.11.
|
||
*/
|
||
assert(c->element == n->element);
|
||
|
||
switch(c->element) {
|
||
case choice_GeneralName_otherName:
|
||
if (der_heim_oid_cmp(&c->u.otherName.type_id,
|
||
&n->u.otherName.type_id) != 0)
|
||
return HX509_NAME_CONSTRAINT_ERROR;
|
||
if (heim_any_cmp(&c->u.otherName.value,
|
||
&n->u.otherName.value) != 0)
|
||
return HX509_NAME_CONSTRAINT_ERROR;
|
||
*match = 1;
|
||
return 0;
|
||
case choice_GeneralName_rfc822Name: {
|
||
const char *s;
|
||
size_t len1, len2;
|
||
s = strchr(c->u.rfc822Name, '@');
|
||
if (s) {
|
||
if (strcasecmp(c->u.rfc822Name, n->u.rfc822Name) != 0)
|
||
return HX509_NAME_CONSTRAINT_ERROR;
|
||
} else {
|
||
s = strchr(n->u.rfc822Name, '@');
|
||
if (s == NULL)
|
||
return HX509_NAME_CONSTRAINT_ERROR;
|
||
len1 = strlen(c->u.rfc822Name);
|
||
len2 = strlen(s + 1);
|
||
if (len1 > len2)
|
||
return HX509_NAME_CONSTRAINT_ERROR;
|
||
if (strcasecmp(s + 1 + len2 - len1, c->u.rfc822Name) != 0)
|
||
return HX509_NAME_CONSTRAINT_ERROR;
|
||
if (len1 < len2 && s[len2 - len1] != '.')
|
||
return HX509_NAME_CONSTRAINT_ERROR;
|
||
}
|
||
*match = 1;
|
||
return 0;
|
||
}
|
||
case choice_GeneralName_dNSName: {
|
||
size_t lenc, lenn;
|
||
|
||
lenc = strlen(c->u.dNSName);
|
||
lenn = strlen(n->u.dNSName);
|
||
if (lenc > lenn)
|
||
return HX509_NAME_CONSTRAINT_ERROR;
|
||
if (strcasecmp(&n->u.dNSName[lenn - lenc], c->u.dNSName) != 0)
|
||
return HX509_NAME_CONSTRAINT_ERROR;
|
||
if (lenc != lenn && n->u.dNSName[lenn - lenc - 1] != '.')
|
||
return HX509_NAME_CONSTRAINT_ERROR;
|
||
*match = 1;
|
||
return 0;
|
||
}
|
||
case choice_GeneralName_directoryName: {
|
||
Name c_name, n_name;
|
||
int ret;
|
||
|
||
c_name._save.data = NULL;
|
||
c_name._save.length = 0;
|
||
c_name.element = c->u.directoryName.element;
|
||
c_name.u.rdnSequence = c->u.directoryName.u.rdnSequence;
|
||
|
||
n_name._save.data = NULL;
|
||
n_name._save.length = 0;
|
||
n_name.element = n->u.directoryName.element;
|
||
n_name.u.rdnSequence = n->u.directoryName.u.rdnSequence;
|
||
|
||
ret = match_X501Name(&c_name, &n_name);
|
||
if (ret == 0)
|
||
*match = 1;
|
||
return ret;
|
||
}
|
||
case choice_GeneralName_uniformResourceIdentifier:
|
||
case choice_GeneralName_iPAddress:
|
||
case choice_GeneralName_registeredID:
|
||
default:
|
||
return HX509_NAME_CONSTRAINT_ERROR;
|
||
}
|
||
}
|
||
|
||
static int
|
||
match_alt_name(const GeneralName *n, const Certificate *c,
|
||
int *same, int *match)
|
||
{
|
||
GeneralNames sa;
|
||
int ret, i, j;
|
||
|
||
i = 0;
|
||
do {
|
||
ret = find_extension_subject_alt_name(c, &i, &sa);
|
||
if (ret == HX509_EXTENSION_NOT_FOUND) {
|
||
ret = 0;
|
||
break;
|
||
} else if (ret != 0)
|
||
break;
|
||
|
||
for (j = 0; j < sa.len; j++) {
|
||
if (n->element == sa.val[j].element) {
|
||
*same = 1;
|
||
ret = match_general_name(n, &sa.val[j], match);
|
||
}
|
||
}
|
||
free_GeneralNames(&sa);
|
||
} while (1);
|
||
|
||
return ret;
|
||
}
|
||
|
||
|
||
static int
|
||
match_tree(const GeneralSubtrees *t, const Certificate *c, int *match)
|
||
{
|
||
int name, alt_name, same;
|
||
unsigned int i;
|
||
int ret = 0;
|
||
|
||
name = alt_name = same = *match = 0;
|
||
for (i = 0; i < t->len; i++) {
|
||
if (t->val[i].minimum && t->val[i].maximum)
|
||
return HX509_RANGE;
|
||
|
||
/*
|
||
* If the constraint apply to directoryNames, test is with
|
||
* subjectName of the certificate if the certificate have a
|
||
* non-null (empty) subjectName.
|
||
*/
|
||
|
||
if (t->val[i].base.element == choice_GeneralName_directoryName
|
||
&& !subject_null_p(c))
|
||
{
|
||
GeneralName certname;
|
||
|
||
memset(&certname, 0, sizeof(certname));
|
||
certname.element = choice_GeneralName_directoryName;
|
||
certname.u.directoryName.element =
|
||
c->tbsCertificate.subject.element;
|
||
certname.u.directoryName.u.rdnSequence =
|
||
c->tbsCertificate.subject.u.rdnSequence;
|
||
|
||
ret = match_general_name(&t->val[i].base, &certname, &name);
|
||
}
|
||
|
||
/* Handle subjectAltNames, this is icky since they
|
||
* restrictions only apply if the subjectAltName is of the
|
||
* same type. So if there have been a match of type, require
|
||
* altname to be set.
|
||
*/
|
||
ret = match_alt_name(&t->val[i].base, c, &same, &alt_name);
|
||
}
|
||
if (name && (!same || alt_name))
|
||
*match = 1;
|
||
return ret;
|
||
}
|
||
|
||
static int
|
||
check_name_constraints(hx509_context context,
|
||
const hx509_name_constraints *nc,
|
||
const Certificate *c)
|
||
{
|
||
int match, ret;
|
||
int i;
|
||
|
||
for (i = 0 ; i < nc->len; i++) {
|
||
GeneralSubtrees gs;
|
||
|
||
if (nc->val[i].permittedSubtrees) {
|
||
GeneralSubtrees_SET(&gs, nc->val[i].permittedSubtrees);
|
||
ret = match_tree(&gs, c, &match);
|
||
if (ret) {
|
||
hx509_clear_error_string(context);
|
||
return ret;
|
||
}
|
||
/* allow null subjectNames, they wont matches anything */
|
||
if (match == 0 && !subject_null_p(c)) {
|
||
hx509_clear_error_string(context);
|
||
return HX509_VERIFY_CONSTRAINTS;
|
||
}
|
||
}
|
||
if (nc->val[i].excludedSubtrees) {
|
||
GeneralSubtrees_SET(&gs, nc->val[i].excludedSubtrees);
|
||
ret = match_tree(&gs, c, &match);
|
||
if (ret) {
|
||
hx509_clear_error_string(context);
|
||
return ret;
|
||
}
|
||
if (match) {
|
||
hx509_clear_error_string(context);
|
||
return HX509_VERIFY_CONSTRAINTS;
|
||
}
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
free_name_constraints(hx509_name_constraints *nc)
|
||
{
|
||
int i;
|
||
|
||
for (i = 0 ; i < nc->len; i++)
|
||
free_NameConstraints(&nc->val[i]);
|
||
free(nc->val);
|
||
}
|
||
|
||
int
|
||
hx509_verify_path(hx509_context context,
|
||
hx509_verify_ctx ctx,
|
||
hx509_cert cert,
|
||
hx509_certs pool)
|
||
{
|
||
hx509_name_constraints nc;
|
||
hx509_path path;
|
||
#if 0
|
||
const AlgorithmIdentifier *alg_id;
|
||
#endif
|
||
int ret, i, proxy_cert_depth;
|
||
enum certtype type;
|
||
Name proxy_issuer;
|
||
hx509_certs anchors = NULL;
|
||
|
||
memset(&proxy_issuer, 0, sizeof(proxy_issuer));
|
||
|
||
ret = init_name_constraints(&nc);
|
||
if (ret)
|
||
return ret;
|
||
|
||
path.val = NULL;
|
||
path.len = 0;
|
||
|
||
if ((ctx->flags & HX509_VERIFY_CTX_F_TIME_SET) == 0)
|
||
ctx->time_now = time(NULL);
|
||
|
||
/*
|
||
*
|
||
*/
|
||
if (ctx->trust_anchors)
|
||
anchors = _hx509_certs_ref(ctx->trust_anchors);
|
||
else if (context->default_trust_anchors && ALLOW_DEF_TA(ctx))
|
||
anchors = _hx509_certs_ref(context->default_trust_anchors);
|
||
else {
|
||
ret = hx509_certs_init(context, "MEMORY:no-TA", 0, NULL, &anchors);
|
||
if (ret)
|
||
goto out;
|
||
}
|
||
|
||
/*
|
||
* Calculate the path from the certificate user presented to the
|
||
* to an anchor.
|
||
*/
|
||
ret = _hx509_calculate_path(context, 0, ctx->time_now,
|
||
anchors, ctx->max_depth,
|
||
cert, pool, &path);
|
||
if (ret)
|
||
goto out;
|
||
|
||
#if 0
|
||
alg_id = path.val[path->len - 1]->data->tbsCertificate.signature;
|
||
#endif
|
||
|
||
/*
|
||
* Check CA and proxy certificate chain from the top of the
|
||
* certificate chain. Also check certificate is valid with respect
|
||
* to the current time.
|
||
*
|
||
*/
|
||
|
||
proxy_cert_depth = 0;
|
||
|
||
if (ctx->flags & HX509_VERIFY_CTX_F_ALLOW_PROXY_CERTIFICATE)
|
||
type = PROXY_CERT;
|
||
else
|
||
type = EE_CERT;
|
||
|
||
for (i = 0; i < path.len; i++) {
|
||
Certificate *c;
|
||
time_t t;
|
||
|
||
c = _hx509_get_cert(path.val[i]);
|
||
|
||
/*
|
||
* Lets do some basic check on issuer like
|
||
* keyUsage.keyCertSign and basicConstraints.cA bit depending
|
||
* on what type of certificate this is.
|
||
*/
|
||
|
||
switch (type) {
|
||
case CA_CERT:
|
||
/* XXX make constants for keyusage */
|
||
ret = check_key_usage(context, c, 1 << 5,
|
||
REQUIRE_RFC3280(ctx) ? TRUE : FALSE);
|
||
if (ret) {
|
||
hx509_set_error_string(context, HX509_ERROR_APPEND, ret,
|
||
"Key usage missing from CA certificate");
|
||
goto out;
|
||
}
|
||
break;
|
||
case PROXY_CERT: {
|
||
ProxyCertInfo info;
|
||
|
||
if (is_proxy_cert(context, c, &info) == 0) {
|
||
int j;
|
||
|
||
if (info.pCPathLenConstraint != NULL &&
|
||
*info.pCPathLenConstraint < i)
|
||
{
|
||
free_ProxyCertInfo(&info);
|
||
ret = HX509_PATH_TOO_LONG;
|
||
hx509_set_error_string(context, 0, ret,
|
||
"Proxy certificate chain "
|
||
"longer then allowed");
|
||
goto out;
|
||
}
|
||
/* XXX MUST check info.proxyPolicy */
|
||
free_ProxyCertInfo(&info);
|
||
|
||
j = 0;
|
||
if (find_extension(c, oid_id_x509_ce_subjectAltName(), &j)) {
|
||
ret = HX509_PROXY_CERT_INVALID;
|
||
hx509_set_error_string(context, 0, ret,
|
||
"Proxy certificate have explicity "
|
||
"forbidden subjectAltName");
|
||
goto out;
|
||
}
|
||
|
||
j = 0;
|
||
if (find_extension(c, oid_id_x509_ce_issuerAltName(), &j)) {
|
||
ret = HX509_PROXY_CERT_INVALID;
|
||
hx509_set_error_string(context, 0, ret,
|
||
"Proxy certificate have explicity "
|
||
"forbidden issuerAltName");
|
||
goto out;
|
||
}
|
||
|
||
/*
|
||
* The subject name of the proxy certificate should be
|
||
* CN=XXX,<proxy issuer>, prune of CN and check if its
|
||
* the same over the whole chain of proxy certs and
|
||
* then check with the EE cert when we get to it.
|
||
*/
|
||
|
||
if (proxy_cert_depth) {
|
||
ret = _hx509_name_cmp(&proxy_issuer, &c->tbsCertificate.subject);
|
||
if (ret) {
|
||
ret = HX509_PROXY_CERT_NAME_WRONG;
|
||
hx509_set_error_string(context, 0, ret,
|
||
"Base proxy name not right");
|
||
goto out;
|
||
}
|
||
}
|
||
|
||
free_Name(&proxy_issuer);
|
||
|
||
ret = copy_Name(&c->tbsCertificate.subject, &proxy_issuer);
|
||
if (ret) {
|
||
hx509_clear_error_string(context);
|
||
goto out;
|
||
}
|
||
|
||
j = proxy_issuer.u.rdnSequence.len;
|
||
if (proxy_issuer.u.rdnSequence.len < 2
|
||
|| proxy_issuer.u.rdnSequence.val[j - 1].len > 1
|
||
|| der_heim_oid_cmp(&proxy_issuer.u.rdnSequence.val[j - 1].val[0].type,
|
||
oid_id_at_commonName()))
|
||
{
|
||
ret = HX509_PROXY_CERT_NAME_WRONG;
|
||
hx509_set_error_string(context, 0, ret,
|
||
"Proxy name too short or "
|
||
"does not have Common name "
|
||
"at the top");
|
||
goto out;
|
||
}
|
||
|
||
free_RelativeDistinguishedName(&proxy_issuer.u.rdnSequence.val[j - 1]);
|
||
proxy_issuer.u.rdnSequence.len -= 1;
|
||
|
||
ret = _hx509_name_cmp(&proxy_issuer, &c->tbsCertificate.issuer);
|
||
if (ret != 0) {
|
||
ret = HX509_PROXY_CERT_NAME_WRONG;
|
||
hx509_set_error_string(context, 0, ret,
|
||
"Proxy issuer name not as expected");
|
||
goto out;
|
||
}
|
||
|
||
break;
|
||
} else {
|
||
/*
|
||
* Now we are done with the proxy certificates, this
|
||
* cert was an EE cert and we we will fall though to
|
||
* EE checking below.
|
||
*/
|
||
type = EE_CERT;
|
||
/* FALLTHOUGH */
|
||
}
|
||
}
|
||
case EE_CERT:
|
||
/*
|
||
* If there where any proxy certificates in the chain
|
||
* (proxy_cert_depth > 0), check that the proxy issuer
|
||
* matched proxy certificates "base" subject.
|
||
*/
|
||
if (proxy_cert_depth) {
|
||
|
||
ret = _hx509_name_cmp(&proxy_issuer,
|
||
&c->tbsCertificate.subject);
|
||
if (ret) {
|
||
ret = HX509_PROXY_CERT_NAME_WRONG;
|
||
hx509_clear_error_string(context);
|
||
goto out;
|
||
}
|
||
if (cert->basename)
|
||
hx509_name_free(&cert->basename);
|
||
|
||
ret = _hx509_name_from_Name(&proxy_issuer, &cert->basename);
|
||
if (ret) {
|
||
hx509_clear_error_string(context);
|
||
goto out;
|
||
}
|
||
}
|
||
|
||
break;
|
||
}
|
||
|
||
ret = check_basic_constraints(context, c, type, i - proxy_cert_depth);
|
||
if (ret)
|
||
goto out;
|
||
|
||
/*
|
||
* Don't check the trust anchors expiration time since they
|
||
* are transported out of band, from RFC3820.
|
||
*/
|
||
if (i + 1 != path.len || CHECK_TA(ctx)) {
|
||
|
||
t = _hx509_Time2time_t(&c->tbsCertificate.validity.notBefore);
|
||
if (t > ctx->time_now) {
|
||
ret = HX509_CERT_USED_BEFORE_TIME;
|
||
hx509_clear_error_string(context);
|
||
goto out;
|
||
}
|
||
t = _hx509_Time2time_t(&c->tbsCertificate.validity.notAfter);
|
||
if (t < ctx->time_now) {
|
||
ret = HX509_CERT_USED_AFTER_TIME;
|
||
hx509_clear_error_string(context);
|
||
goto out;
|
||
}
|
||
}
|
||
|
||
if (type == EE_CERT)
|
||
type = CA_CERT;
|
||
else if (type == PROXY_CERT)
|
||
proxy_cert_depth++;
|
||
}
|
||
|
||
/*
|
||
* Verify constraints, do this backward so path constraints are
|
||
* checked in the right order.
|
||
*/
|
||
|
||
for (ret = 0, i = path.len - 1; i >= 0; i--) {
|
||
Certificate *c;
|
||
|
||
c = _hx509_get_cert(path.val[i]);
|
||
|
||
#if 0
|
||
/* check that algorithm and parameters is the same */
|
||
/* XXX this is wrong */
|
||
ret = alg_cmp(&c->tbsCertificate.signature, alg_id);
|
||
if (ret) {
|
||
hx509_clear_error_string(context);
|
||
ret = HX509_PATH_ALGORITHM_CHANGED;
|
||
goto out;
|
||
}
|
||
#endif
|
||
|
||
/* verify name constraints, not for selfsigned and anchor */
|
||
if (!certificate_is_self_signed(c) || i == path.len - 1) {
|
||
ret = check_name_constraints(context, &nc, c);
|
||
if (ret) {
|
||
goto out;
|
||
}
|
||
}
|
||
ret = add_name_constraints(context, c, i == 0, &nc);
|
||
if (ret)
|
||
goto out;
|
||
|
||
/* XXX verify all other silly constraints */
|
||
|
||
}
|
||
|
||
/*
|
||
* Verify that no certificates has been revoked.
|
||
*/
|
||
|
||
if (ctx->revoke_ctx) {
|
||
hx509_certs certs;
|
||
|
||
ret = hx509_certs_init(context, "MEMORY:revoke-certs", 0,
|
||
NULL, &certs);
|
||
if (ret)
|
||
goto out;
|
||
|
||
for (i = 0; i < path.len; i++) {
|
||
ret = hx509_certs_add(context, certs, path.val[i]);
|
||
if (ret) {
|
||
hx509_certs_free(&certs);
|
||
goto out;
|
||
}
|
||
}
|
||
ret = hx509_certs_merge(context, certs, pool);
|
||
if (ret) {
|
||
hx509_certs_free(&certs);
|
||
goto out;
|
||
}
|
||
|
||
for (i = 0; i < path.len - 1; i++) {
|
||
int parent = (i < path.len - 1) ? i + 1 : i;
|
||
|
||
ret = hx509_revoke_verify(context,
|
||
ctx->revoke_ctx,
|
||
certs,
|
||
ctx->time_now,
|
||
path.val[i],
|
||
path.val[parent]);
|
||
if (ret) {
|
||
hx509_certs_free(&certs);
|
||
goto out;
|
||
}
|
||
}
|
||
hx509_certs_free(&certs);
|
||
}
|
||
|
||
#if 0
|
||
for (i = path.len - 1; i >= 0; i--) {
|
||
_hx509_print_cert_subject(path.val[i]);
|
||
}
|
||
#endif
|
||
|
||
/*
|
||
* Verify signatures, do this backward so public key working
|
||
* parameter is passed up from the anchor up though the chain.
|
||
*/
|
||
|
||
for (i = path.len - 1; i >= 0; i--) {
|
||
Certificate *signer, *c;
|
||
|
||
c = _hx509_get_cert(path.val[i]);
|
||
|
||
/* is last in chain (trust anchor) */
|
||
if (i == path.len - 1) {
|
||
signer = path.val[i]->data;
|
||
|
||
/* if trust anchor is not self signed, don't check sig */
|
||
if (!certificate_is_self_signed(signer))
|
||
continue;
|
||
} else {
|
||
/* take next certificate in chain */
|
||
signer = path.val[i + 1]->data;
|
||
}
|
||
|
||
/* verify signatureValue */
|
||
ret = _hx509_verify_signature_bitstring(context,
|
||
signer,
|
||
&c->signatureAlgorithm,
|
||
&c->tbsCertificate._save,
|
||
&c->signatureValue);
|
||
if (ret) {
|
||
hx509_set_error_string(context, HX509_ERROR_APPEND, ret,
|
||
"Failed to verify signature of certificate");
|
||
goto out;
|
||
}
|
||
}
|
||
|
||
out:
|
||
hx509_certs_free(&anchors);
|
||
free_Name(&proxy_issuer);
|
||
free_name_constraints(&nc);
|
||
_hx509_path_free(&path);
|
||
|
||
return ret;
|
||
}
|
||
|
||
int
|
||
hx509_verify_signature(hx509_context context,
|
||
const hx509_cert signer,
|
||
const AlgorithmIdentifier *alg,
|
||
const heim_octet_string *data,
|
||
const heim_octet_string *sig)
|
||
{
|
||
return _hx509_verify_signature(context, signer->data, alg, data, sig);
|
||
}
|
||
|
||
#define HX509_VHN_F_ALLOW_NO_MATCH 1
|
||
|
||
int
|
||
hx509_verify_hostname(hx509_context context,
|
||
const hx509_cert cert,
|
||
int flags,
|
||
hx509_hostname_type type,
|
||
const char *hostname,
|
||
const struct sockaddr *sa,
|
||
/* XXX krb5_socklen_t */ int sa_size)
|
||
{
|
||
GeneralNames san;
|
||
int ret, i, j;
|
||
|
||
if (sa && sa_size <= 0)
|
||
return EINVAL;
|
||
|
||
memset(&san, 0, sizeof(san));
|
||
|
||
i = 0;
|
||
do {
|
||
ret = find_extension_subject_alt_name(cert->data, &i, &san);
|
||
if (ret == HX509_EXTENSION_NOT_FOUND) {
|
||
ret = 0;
|
||
break;
|
||
} else if (ret != 0)
|
||
break;
|
||
|
||
for (j = 0; j < san.len; j++) {
|
||
switch (san.val[j].element) {
|
||
case choice_GeneralName_dNSName:
|
||
if (strcasecmp(san.val[j].u.dNSName, hostname) == 0) {
|
||
free_GeneralNames(&san);
|
||
return 0;
|
||
}
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
free_GeneralNames(&san);
|
||
} while (1);
|
||
|
||
{
|
||
Name *name = &cert->data->tbsCertificate.subject;
|
||
|
||
/* match if first component is a CN= */
|
||
if (name->u.rdnSequence.len > 0
|
||
&& name->u.rdnSequence.val[0].len == 1
|
||
&& der_heim_oid_cmp(&name->u.rdnSequence.val[0].val[0].type,
|
||
oid_id_at_commonName()) == 0)
|
||
{
|
||
DirectoryString *ds = &name->u.rdnSequence.val[0].val[0].value;
|
||
|
||
switch (ds->element) {
|
||
case choice_DirectoryString_printableString:
|
||
if (strcasecmp(ds->u.printableString, hostname) == 0)
|
||
return 0;
|
||
break;
|
||
case choice_DirectoryString_ia5String:
|
||
if (strcasecmp(ds->u.ia5String, hostname) == 0)
|
||
return 0;
|
||
break;
|
||
case choice_DirectoryString_utf8String:
|
||
if (strcasecmp(ds->u.utf8String, hostname) == 0)
|
||
return 0;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
if ((flags & HX509_VHN_F_ALLOW_NO_MATCH) == 0)
|
||
ret = HX509_NAME_CONSTRAINT_ERROR;
|
||
|
||
return ret;
|
||
}
|
||
|
||
int
|
||
_hx509_set_cert_attribute(hx509_context context,
|
||
hx509_cert cert,
|
||
const heim_oid *oid,
|
||
const heim_octet_string *attr)
|
||
{
|
||
hx509_cert_attribute a;
|
||
void *d;
|
||
|
||
if (hx509_cert_get_attribute(cert, oid) != NULL)
|
||
return 0;
|
||
|
||
d = realloc(cert->attrs.val,
|
||
sizeof(cert->attrs.val[0]) * (cert->attrs.len + 1));
|
||
if (d == NULL) {
|
||
hx509_clear_error_string(context);
|
||
return ENOMEM;
|
||
}
|
||
cert->attrs.val = d;
|
||
|
||
a = malloc(sizeof(*a));
|
||
if (a == NULL)
|
||
return ENOMEM;
|
||
|
||
der_copy_octet_string(attr, &a->data);
|
||
der_copy_oid(oid, &a->oid);
|
||
|
||
cert->attrs.val[cert->attrs.len] = a;
|
||
cert->attrs.len++;
|
||
|
||
return 0;
|
||
}
|
||
|
||
hx509_cert_attribute
|
||
hx509_cert_get_attribute(hx509_cert cert, const heim_oid *oid)
|
||
{
|
||
int i;
|
||
for (i = 0; i < cert->attrs.len; i++)
|
||
if (der_heim_oid_cmp(oid, &cert->attrs.val[i]->oid) == 0)
|
||
return cert->attrs.val[i];
|
||
return NULL;
|
||
}
|
||
|
||
int
|
||
hx509_cert_set_friendly_name(hx509_cert cert, const char *name)
|
||
{
|
||
if (cert->friendlyname)
|
||
free(cert->friendlyname);
|
||
cert->friendlyname = strdup(name);
|
||
if (cert->friendlyname == NULL)
|
||
return ENOMEM;
|
||
return 0;
|
||
}
|
||
|
||
|
||
const char *
|
||
hx509_cert_get_friendly_name(hx509_cert cert)
|
||
{
|
||
hx509_cert_attribute a;
|
||
PKCS9_friendlyName n;
|
||
size_t sz;
|
||
int ret, i;
|
||
|
||
if (cert->friendlyname)
|
||
return cert->friendlyname;
|
||
|
||
a = hx509_cert_get_attribute(cert, oid_id_pkcs_9_at_friendlyName());
|
||
if (a == NULL) {
|
||
/* XXX use subject name ? */
|
||
return NULL;
|
||
}
|
||
|
||
ret = decode_PKCS9_friendlyName(a->data.data, a->data.length, &n, &sz);
|
||
if (ret)
|
||
return NULL;
|
||
|
||
if (n.len != 1) {
|
||
free_PKCS9_friendlyName(&n);
|
||
return NULL;
|
||
}
|
||
|
||
cert->friendlyname = malloc(n.val[0].length + 1);
|
||
if (cert->friendlyname == NULL) {
|
||
free_PKCS9_friendlyName(&n);
|
||
return NULL;
|
||
}
|
||
|
||
for (i = 0; i < n.val[0].length; i++) {
|
||
if (n.val[0].data[i] <= 0xff)
|
||
cert->friendlyname[i] = n.val[0].data[i] & 0xff;
|
||
else
|
||
cert->friendlyname[i] = 'X';
|
||
}
|
||
cert->friendlyname[i] = '\0';
|
||
free_PKCS9_friendlyName(&n);
|
||
|
||
return cert->friendlyname;
|
||
}
|
||
|
||
void
|
||
_hx509_query_clear(hx509_query *q)
|
||
{
|
||
memset(q, 0, sizeof(*q));
|
||
}
|
||
|
||
int
|
||
hx509_query_alloc(hx509_context context, hx509_query **q)
|
||
{
|
||
*q = calloc(1, sizeof(**q));
|
||
if (*q == NULL)
|
||
return ENOMEM;
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
hx509_query_match_option(hx509_query *q, hx509_query_option option)
|
||
{
|
||
switch(option) {
|
||
case HX509_QUERY_OPTION_PRIVATE_KEY:
|
||
q->match |= HX509_QUERY_PRIVATE_KEY;
|
||
break;
|
||
case HX509_QUERY_OPTION_KU_ENCIPHERMENT:
|
||
q->match |= HX509_QUERY_KU_ENCIPHERMENT;
|
||
break;
|
||
case HX509_QUERY_OPTION_KU_DIGITALSIGNATURE:
|
||
q->match |= HX509_QUERY_KU_DIGITALSIGNATURE;
|
||
break;
|
||
case HX509_QUERY_OPTION_KU_KEYCERTSIGN:
|
||
q->match |= HX509_QUERY_KU_KEYCERTSIGN;
|
||
break;
|
||
case HX509_QUERY_OPTION_END:
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
int
|
||
hx509_query_match_issuer_serial(hx509_query *q,
|
||
const Name *issuer,
|
||
const heim_integer *serialNumber)
|
||
{
|
||
int ret;
|
||
if (q->serial) {
|
||
der_free_heim_integer(q->serial);
|
||
free(q->serial);
|
||
}
|
||
q->serial = malloc(sizeof(*q->serial));
|
||
if (q->serial == NULL)
|
||
return ENOMEM;
|
||
ret = der_copy_heim_integer(serialNumber, q->serial);
|
||
if (ret) {
|
||
free(q->serial);
|
||
q->serial = NULL;
|
||
return ret;
|
||
}
|
||
if (q->issuer_name) {
|
||
free_Name(q->issuer_name);
|
||
free(q->issuer_name);
|
||
}
|
||
q->issuer_name = malloc(sizeof(*q->issuer_name));
|
||
if (q->issuer_name == NULL)
|
||
return ENOMEM;
|
||
ret = copy_Name(issuer, q->issuer_name);
|
||
if (ret) {
|
||
free(q->issuer_name);
|
||
q->issuer_name = NULL;
|
||
return ret;
|
||
}
|
||
q->match |= HX509_QUERY_MATCH_SERIALNUMBER|HX509_QUERY_MATCH_ISSUER_NAME;
|
||
return 0;
|
||
}
|
||
|
||
|
||
int
|
||
hx509_query_match_friendly_name(hx509_query *q, const char *name)
|
||
{
|
||
if (q->friendlyname)
|
||
free(q->friendlyname);
|
||
q->friendlyname = strdup(name);
|
||
if (q->friendlyname == NULL)
|
||
return ENOMEM;
|
||
q->match |= HX509_QUERY_MATCH_FRIENDLY_NAME;
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
hx509_query_match_cmp_func(hx509_query *q,
|
||
int (*func)(void *, hx509_cert),
|
||
void *ctx)
|
||
{
|
||
if (func)
|
||
q->match |= HX509_QUERY_MATCH_FUNCTION;
|
||
else
|
||
q->match &= ~HX509_QUERY_MATCH_FUNCTION;
|
||
q->cmp_func = func;
|
||
q->cmp_func_ctx = ctx;
|
||
return 0;
|
||
}
|
||
|
||
|
||
void
|
||
hx509_query_free(hx509_context context, hx509_query *q)
|
||
{
|
||
if (q->serial) {
|
||
der_free_heim_integer(q->serial);
|
||
free(q->serial);
|
||
q->serial = NULL;
|
||
}
|
||
if (q->issuer_name) {
|
||
free_Name(q->issuer_name);
|
||
free(q->issuer_name);
|
||
q->issuer_name = NULL;
|
||
}
|
||
if (q) {
|
||
free(q->friendlyname);
|
||
memset(q, 0, sizeof(*q));
|
||
}
|
||
free(q);
|
||
}
|
||
|
||
int
|
||
_hx509_query_match_cert(hx509_context context, const hx509_query *q, hx509_cert cert)
|
||
{
|
||
Certificate *c = _hx509_get_cert(cert);
|
||
|
||
_hx509_query_statistic(context, 1, q);
|
||
|
||
if ((q->match & HX509_QUERY_FIND_ISSUER_CERT) &&
|
||
_hx509_cert_is_parent_cmp(q->subject, c, 0) != 0)
|
||
return 0;
|
||
|
||
if ((q->match & HX509_QUERY_MATCH_CERTIFICATE) &&
|
||
_hx509_Certificate_cmp(q->certificate, c) != 0)
|
||
return 0;
|
||
|
||
if ((q->match & HX509_QUERY_MATCH_SERIALNUMBER)
|
||
&& der_heim_integer_cmp(&c->tbsCertificate.serialNumber, q->serial) != 0)
|
||
return 0;
|
||
|
||
if ((q->match & HX509_QUERY_MATCH_ISSUER_NAME)
|
||
&& _hx509_name_cmp(&c->tbsCertificate.issuer, q->issuer_name) != 0)
|
||
return 0;
|
||
|
||
if ((q->match & HX509_QUERY_MATCH_SUBJECT_NAME)
|
||
&& _hx509_name_cmp(&c->tbsCertificate.subject, q->subject_name) != 0)
|
||
return 0;
|
||
|
||
if (q->match & HX509_QUERY_MATCH_SUBJECT_KEY_ID) {
|
||
SubjectKeyIdentifier si;
|
||
int ret;
|
||
|
||
ret = _hx509_find_extension_subject_key_id(c, &si);
|
||
if (ret == 0) {
|
||
if (der_heim_octet_string_cmp(&si, q->subject_id) != 0)
|
||
ret = 1;
|
||
free_SubjectKeyIdentifier(&si);
|
||
}
|
||
if (ret)
|
||
return 0;
|
||
}
|
||
if ((q->match & HX509_QUERY_MATCH_ISSUER_ID))
|
||
return 0;
|
||
if ((q->match & HX509_QUERY_PRIVATE_KEY) &&
|
||
_hx509_cert_private_key(cert) == NULL)
|
||
return 0;
|
||
|
||
{
|
||
unsigned ku = 0;
|
||
if (q->match & HX509_QUERY_KU_DIGITALSIGNATURE)
|
||
ku |= (1 << 0);
|
||
if (q->match & HX509_QUERY_KU_NONREPUDIATION)
|
||
ku |= (1 << 1);
|
||
if (q->match & HX509_QUERY_KU_ENCIPHERMENT)
|
||
ku |= (1 << 2);
|
||
if (q->match & HX509_QUERY_KU_DATAENCIPHERMENT)
|
||
ku |= (1 << 3);
|
||
if (q->match & HX509_QUERY_KU_KEYAGREEMENT)
|
||
ku |= (1 << 4);
|
||
if (q->match & HX509_QUERY_KU_KEYCERTSIGN)
|
||
ku |= (1 << 5);
|
||
if (q->match & HX509_QUERY_KU_CRLSIGN)
|
||
ku |= (1 << 6);
|
||
if (ku && check_key_usage(context, c, ku, TRUE))
|
||
return 0;
|
||
}
|
||
if ((q->match & HX509_QUERY_ANCHOR))
|
||
return 0;
|
||
|
||
if (q->match & HX509_QUERY_MATCH_LOCAL_KEY_ID) {
|
||
hx509_cert_attribute a;
|
||
|
||
a = hx509_cert_get_attribute(cert, oid_id_pkcs_9_at_localKeyId());
|
||
if (a == NULL)
|
||
return 0;
|
||
if (der_heim_octet_string_cmp(&a->data, q->local_key_id) != 0)
|
||
return 0;
|
||
}
|
||
|
||
if (q->match & HX509_QUERY_NO_MATCH_PATH) {
|
||
size_t i;
|
||
|
||
for (i = 0; i < q->path->len; i++)
|
||
if (hx509_cert_cmp(q->path->val[i], cert) == 0)
|
||
return 0;
|
||
}
|
||
if (q->match & HX509_QUERY_MATCH_FRIENDLY_NAME) {
|
||
const char *name = hx509_cert_get_friendly_name(cert);
|
||
if (name == NULL)
|
||
return 0;
|
||
if (strcasecmp(q->friendlyname, name) != 0)
|
||
return 0;
|
||
}
|
||
if (q->match & HX509_QUERY_MATCH_FUNCTION) {
|
||
int ret = (*q->cmp_func)(q->cmp_func_ctx, cert);
|
||
if (ret != 0)
|
||
return 0;
|
||
}
|
||
|
||
if (q->match & HX509_QUERY_MATCH_KEY_HASH_SHA1) {
|
||
heim_octet_string os;
|
||
int ret;
|
||
|
||
os.data = c->tbsCertificate.subjectPublicKeyInfo.subjectPublicKey.data;
|
||
os.length =
|
||
c->tbsCertificate.subjectPublicKeyInfo.subjectPublicKey.length / 8;
|
||
|
||
ret = _hx509_verify_signature(context,
|
||
NULL,
|
||
hx509_signature_sha1(),
|
||
&os,
|
||
q->keyhash_sha1);
|
||
if (ret != 0)
|
||
return 0;
|
||
}
|
||
|
||
if (q->match & HX509_QUERY_MATCH_TIME) {
|
||
time_t t;
|
||
t = _hx509_Time2time_t(&c->tbsCertificate.validity.notBefore);
|
||
if (t > q->timenow)
|
||
return 0;
|
||
t = _hx509_Time2time_t(&c->tbsCertificate.validity.notAfter);
|
||
if (t < q->timenow)
|
||
return 0;
|
||
}
|
||
|
||
if (q->match & ~HX509_QUERY_MASK)
|
||
return 0;
|
||
|
||
return 1;
|
||
}
|
||
|
||
void
|
||
hx509_query_statistic_file(hx509_context context, const char *fn)
|
||
{
|
||
if (context->querystat)
|
||
free(context->querystat);
|
||
context->querystat = strdup(fn);
|
||
}
|
||
|
||
void
|
||
_hx509_query_statistic(hx509_context context, int type, const hx509_query *q)
|
||
{
|
||
FILE *f;
|
||
if (context->querystat == NULL)
|
||
return;
|
||
f = fopen(context->querystat, "a");
|
||
if (f == NULL)
|
||
return;
|
||
fprintf(f, "%d %d\n", type, q->match);
|
||
fclose(f);
|
||
}
|
||
|
||
static const char *statname[] = {
|
||
"find issuer cert",
|
||
"match serialnumber",
|
||
"match issuer name",
|
||
"match subject name",
|
||
"match subject key id",
|
||
"match issuer id",
|
||
"private key",
|
||
"ku encipherment",
|
||
"ku digitalsignature",
|
||
"ku keycertsign",
|
||
"ku crlsign",
|
||
"ku nonrepudiation",
|
||
"ku keyagreement",
|
||
"ku dataencipherment",
|
||
"anchor",
|
||
"match certificate",
|
||
"match local key id",
|
||
"no match path",
|
||
"match friendly name",
|
||
"match function",
|
||
"match key hash sha1",
|
||
"match time"
|
||
};
|
||
|
||
struct stat_el {
|
||
unsigned long stats;
|
||
unsigned int index;
|
||
};
|
||
|
||
|
||
static int
|
||
stat_sort(const void *a, const void *b)
|
||
{
|
||
const struct stat_el *ae = a;
|
||
const struct stat_el *be = b;
|
||
return be->stats - ae->stats;
|
||
}
|
||
|
||
void
|
||
hx509_query_unparse_stats(hx509_context context, int printtype, FILE *out)
|
||
{
|
||
rtbl_t t;
|
||
FILE *f;
|
||
int type, mask, i, num;
|
||
unsigned long multiqueries = 0, totalqueries = 0;
|
||
struct stat_el stats[32];
|
||
|
||
if (context->querystat == NULL)
|
||
return;
|
||
f = fopen(context->querystat, "r");
|
||
if (f == NULL) {
|
||
fprintf(out, "No statistic file %s: %s.\n",
|
||
context->querystat, strerror(errno));
|
||
return;
|
||
}
|
||
|
||
for (i = 0; i < sizeof(stats)/sizeof(stats[0]); i++) {
|
||
stats[i].index = i;
|
||
stats[i].stats = 0;
|
||
}
|
||
|
||
while (fscanf(f, "%d %d\n", &type, &mask) == 2) {
|
||
if (type != printtype)
|
||
continue;
|
||
num = i = 0;
|
||
while (mask && i < sizeof(stats)/sizeof(stats[0])) {
|
||
if (mask & 1) {
|
||
stats[i].stats++;
|
||
num++;
|
||
}
|
||
mask = mask >>1 ;
|
||
i++;
|
||
}
|
||
if (num > 1)
|
||
multiqueries++;
|
||
totalqueries++;
|
||
}
|
||
fclose(f);
|
||
|
||
qsort(stats, sizeof(stats)/sizeof(stats[0]), sizeof(stats[0]), stat_sort);
|
||
|
||
t = rtbl_create();
|
||
if (t == NULL)
|
||
errx(1, "out of memory");
|
||
|
||
rtbl_set_separator (t, " ");
|
||
|
||
rtbl_add_column_by_id (t, 0, "Name", 0);
|
||
rtbl_add_column_by_id (t, 1, "Counter", 0);
|
||
|
||
|
||
for (i = 0; i < sizeof(stats)/sizeof(stats[0]); i++) {
|
||
char str[10];
|
||
|
||
if (stats[i].index < sizeof(statname)/sizeof(statname[0]))
|
||
rtbl_add_column_entry_by_id (t, 0, statname[stats[i].index]);
|
||
else {
|
||
snprintf(str, sizeof(str), "%d", stats[i].index);
|
||
rtbl_add_column_entry_by_id (t, 0, str);
|
||
}
|
||
snprintf(str, sizeof(str), "%lu", stats[i].stats);
|
||
rtbl_add_column_entry_by_id (t, 1, str);
|
||
}
|
||
|
||
rtbl_format(t, out);
|
||
rtbl_destroy(t);
|
||
|
||
fprintf(out, "\nQueries: multi %lu total %lu\n",
|
||
multiqueries, totalqueries);
|
||
}
|
||
|
||
int
|
||
hx509_cert_check_eku(hx509_context context, hx509_cert cert,
|
||
const heim_oid *eku, int allow_any_eku)
|
||
{
|
||
ExtKeyUsage e;
|
||
int ret, i;
|
||
|
||
ret = find_extension_eku(_hx509_get_cert(cert), &e);
|
||
if (ret) {
|
||
hx509_clear_error_string(context);
|
||
return ret;
|
||
}
|
||
|
||
for (i = 0; i < e.len; i++) {
|
||
if (der_heim_oid_cmp(eku, &e.val[i]) == 0) {
|
||
free_ExtKeyUsage(&e);
|
||
return 0;
|
||
}
|
||
if (allow_any_eku) {
|
||
#if 0
|
||
if (der_heim_oid_cmp(id_any_eku, &e.val[i]) == 0) {
|
||
free_ExtKeyUsage(&e);
|
||
return 0;
|
||
}
|
||
#endif
|
||
}
|
||
}
|
||
free_ExtKeyUsage(&e);
|
||
hx509_clear_error_string(context);
|
||
return HX509_CERTIFICATE_MISSING_EKU;
|
||
}
|
||
|
||
int
|
||
_hx509_cert_get_keyusage(hx509_context context,
|
||
hx509_cert c,
|
||
KeyUsage *ku)
|
||
{
|
||
Certificate *cert;
|
||
const Extension *e;
|
||
size_t size;
|
||
int ret, i = 0;
|
||
|
||
memset(ku, 0, sizeof(*ku));
|
||
|
||
cert = _hx509_get_cert(c);
|
||
|
||
if (_hx509_cert_get_version(cert) < 3)
|
||
return 0;
|
||
|
||
e = find_extension(cert, oid_id_x509_ce_keyUsage(), &i);
|
||
if (e == NULL)
|
||
return HX509_KU_CERT_MISSING;
|
||
|
||
ret = decode_KeyUsage(e->extnValue.data, e->extnValue.length, ku, &size);
|
||
if (ret)
|
||
return ret;
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
_hx509_cert_get_eku(hx509_context context,
|
||
hx509_cert cert,
|
||
ExtKeyUsage *e)
|
||
{
|
||
int ret;
|
||
|
||
memset(e, 0, sizeof(*e));
|
||
|
||
ret = find_extension_eku(_hx509_get_cert(cert), e);
|
||
if (ret && ret != HX509_EXTENSION_NOT_FOUND) {
|
||
hx509_clear_error_string(context);
|
||
return ret;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
hx509_cert_binary(hx509_context context, hx509_cert c, heim_octet_string *os)
|
||
{
|
||
size_t size;
|
||
int ret;
|
||
|
||
os->data = NULL;
|
||
os->length = 0;
|
||
|
||
ASN1_MALLOC_ENCODE(Certificate, os->data, os->length,
|
||
_hx509_get_cert(c), &size, ret);
|
||
if (ret)
|
||
return ret;
|
||
if (os->length != size)
|
||
_hx509_abort("internal ASN.1 encoder error");
|
||
|
||
return ret;
|
||
}
|
||
|
||
/*
|
||
* Last to avoid lost __attribute__s due to #undef.
|
||
*/
|
||
|
||
#undef __attribute__
|
||
#define __attribute__(X)
|
||
|
||
void
|
||
_hx509_abort(const char *fmt, ...)
|
||
__attribute__ ((noreturn, format (printf, 1, 2)))
|
||
{
|
||
va_list ap;
|
||
va_start(ap, fmt);
|
||
vprintf(fmt, ap);
|
||
va_end(ap);
|
||
printf("\n");
|
||
fflush(stdout);
|
||
abort();
|
||
}
|
||
|