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209 lines
6.2 KiB
209 lines
6.2 KiB
/* |
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* Written by Matt Caswell for the OpenSSL project. |
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*/ |
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/* ==================================================================== |
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* Copyright (c) 1998-2015 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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* openssl-core@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 <openssl/crypto.h> |
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#include <openssl/bio.h> |
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#include <openssl/x509.h> |
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#include <openssl/pem.h> |
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#include <openssl/err.h> |
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static STACK_OF(X509) *load_certs_from_file(const char *filename) |
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{ |
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STACK_OF(X509) *certs; |
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BIO *bio; |
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X509 *x; |
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bio = BIO_new_file(filename, "r"); |
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if (bio == NULL) { |
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return NULL; |
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} |
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certs = sk_X509_new_null(); |
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if (certs == NULL) { |
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BIO_free(bio); |
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return NULL; |
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} |
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ERR_set_mark(); |
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do { |
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x = PEM_read_bio_X509(bio, NULL, 0, NULL); |
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if (x != NULL && !sk_X509_push(certs, x)) { |
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sk_X509_pop_free(certs, X509_free); |
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BIO_free(bio); |
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return NULL; |
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} else if (x == NULL) { |
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/* |
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* We probably just ran out of certs, so ignore any errors |
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* generated |
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*/ |
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ERR_pop_to_mark(); |
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} |
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} while (x != NULL); |
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BIO_free(bio); |
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return certs; |
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} |
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/* |
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* Test for CVE-2015-1793 (Alternate Chains Certificate Forgery) |
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* |
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* Chain is as follows: |
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* |
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* rootCA (self-signed) |
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* | |
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* interCA |
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* | |
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* subinterCA subinterCA (self-signed) |
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* | | |
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* leaf ------------------ |
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* | |
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* bad |
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* |
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* rootCA, interCA, subinterCA, subinterCA (ss) all have CA=TRUE |
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* leaf and bad have CA=FALSE |
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* |
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* subinterCA and subinterCA (ss) have the same subject name and keys |
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* |
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* interCA (but not rootCA) and subinterCA (ss) are in the trusted store |
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* (roots.pem) |
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* leaf and subinterCA are in the untrusted list (untrusted.pem) |
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* bad is the certificate being verified (bad.pem) |
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* |
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* Versions vulnerable to CVE-2015-1793 will fail to detect that leaf has |
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* CA=FALSE, and will therefore incorrectly verify bad |
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* |
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*/ |
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static int test_alt_chains_cert_forgery(void) |
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{ |
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int ret = 0; |
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int i; |
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X509 *x = NULL; |
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STACK_OF(X509) *untrusted = NULL; |
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BIO *bio = NULL; |
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X509_STORE_CTX *sctx = NULL; |
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X509_STORE *store = NULL; |
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X509_LOOKUP *lookup = NULL; |
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store = X509_STORE_new(); |
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if (store == NULL) |
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goto err; |
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lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file()); |
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if (lookup == NULL) |
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goto err; |
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if(!X509_LOOKUP_load_file(lookup, "certs/roots.pem", X509_FILETYPE_PEM)) |
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goto err; |
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untrusted = load_certs_from_file("certs/untrusted.pem"); |
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if ((bio = BIO_new_file("certs/bad.pem", "r")) == NULL) |
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goto err; |
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if((x = PEM_read_bio_X509(bio, NULL, 0, NULL)) == NULL) |
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goto err; |
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sctx = X509_STORE_CTX_new(); |
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if (sctx == NULL) |
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goto err; |
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if (!X509_STORE_CTX_init(sctx, store, x, untrusted)) |
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goto err; |
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i = X509_verify_cert(sctx); |
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if(i == 0 && X509_STORE_CTX_get_error(sctx) |
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== X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT) { |
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/* This is the result we were expecting: Test passed */ |
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ret = 1; |
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} |
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err: |
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X509_STORE_CTX_free(sctx); |
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X509_free(x); |
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BIO_free(bio); |
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sk_X509_pop_free(untrusted, X509_free); |
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X509_STORE_free(store); |
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if (ret != 1) |
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ERR_print_errors_fp(stderr); |
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return ret; |
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} |
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int main(void) |
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{ |
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CRYPTO_malloc_debug_init(); |
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CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL); |
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CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON); |
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ERR_load_crypto_strings(); |
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OpenSSL_add_all_digests(); |
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if (!test_alt_chains_cert_forgery()) { |
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fprintf(stderr, "Test alt chains cert forgery failed\n"); |
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return 1; |
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} |
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EVP_cleanup(); |
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CRYPTO_cleanup_all_ex_data(); |
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ERR_remove_thread_state(NULL); |
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ERR_free_strings(); |
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CRYPTO_mem_leaks_fp(stderr); |
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printf("PASS\n"); |
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return 0; |
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}
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