diff options
Diffstat (limited to 'openssl/crypto/x509/verify_extra_test.c')
| -rw-r--r-- | openssl/crypto/x509/verify_extra_test.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/openssl/crypto/x509/verify_extra_test.c b/openssl/crypto/x509/verify_extra_test.c new file mode 100644 index 0000000..08509f0 --- /dev/null +++ b/openssl/crypto/x509/verify_extra_test.c @@ -0,0 +1,208 @@ +/* + * Written by Matt Caswell for the OpenSSL project. + */ +/* ==================================================================== + * Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@openssl.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.openssl.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +#include <stdio.h> +#include <openssl/crypto.h> +#include <openssl/bio.h> +#include <openssl/x509.h> +#include <openssl/pem.h> +#include <openssl/err.h> + +static STACK_OF(X509) *load_certs_from_file(const char *filename) +{ + STACK_OF(X509) *certs; + BIO *bio; + X509 *x; + + bio = BIO_new_file(filename, "r"); + + if (bio == NULL) { + return NULL; + } + + certs = sk_X509_new_null(); + if (certs == NULL) { + BIO_free(bio); + return NULL; + } + + ERR_set_mark(); + do { + x = PEM_read_bio_X509(bio, NULL, 0, NULL); + if (x != NULL && !sk_X509_push(certs, x)) { + sk_X509_pop_free(certs, X509_free); + BIO_free(bio); + return NULL; + } else if (x == NULL) { + /* + * We probably just ran out of certs, so ignore any errors + * generated + */ + ERR_pop_to_mark(); + } + } while (x != NULL); + + BIO_free(bio); + + return certs; +} + +/* + * Test for CVE-2015-1793 (Alternate Chains Certificate Forgery) + * + * Chain is as follows: + * + * rootCA (self-signed) + * | + * interCA + * | + * subinterCA subinterCA (self-signed) + * | | + * leaf ------------------ + * | + * bad + * + * rootCA, interCA, subinterCA, subinterCA (ss) all have CA=TRUE + * leaf and bad have CA=FALSE + * + * subinterCA and subinterCA (ss) have the same subject name and keys + * + * interCA (but not rootCA) and subinterCA (ss) are in the trusted store + * (roots.pem) + * leaf and subinterCA are in the untrusted list (untrusted.pem) + * bad is the certificate being verified (bad.pem) + * + * Versions vulnerable to CVE-2015-1793 will fail to detect that leaf has + * CA=FALSE, and will therefore incorrectly verify bad + * + */ +static int test_alt_chains_cert_forgery(void) +{ + int ret = 0; + int i; + X509 *x = NULL; + STACK_OF(X509) *untrusted = NULL; + BIO *bio = NULL; + X509_STORE_CTX *sctx = NULL; + X509_STORE *store = NULL; + X509_LOOKUP *lookup = NULL; + + store = X509_STORE_new(); + if (store == NULL) + goto err; + + lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file()); + if (lookup == NULL) + goto err; + if(!X509_LOOKUP_load_file(lookup, "certs/roots.pem", X509_FILETYPE_PEM)) + goto err; + + untrusted = load_certs_from_file("certs/untrusted.pem"); + + if ((bio = BIO_new_file("certs/bad.pem", "r")) == NULL) + goto err; + + if((x = PEM_read_bio_X509(bio, NULL, 0, NULL)) == NULL) + goto err; + + sctx = X509_STORE_CTX_new(); + if (sctx == NULL) + goto err; + + if (!X509_STORE_CTX_init(sctx, store, x, untrusted)) + goto err; + + i = X509_verify_cert(sctx); + + if(i == 0 && X509_STORE_CTX_get_error(sctx) == X509_V_ERR_INVALID_CA) { + /* This is the result we were expecting: Test passed */ + ret = 1; + } + err: + X509_STORE_CTX_free(sctx); + X509_free(x); + BIO_free(bio); + sk_X509_pop_free(untrusted, X509_free); + X509_STORE_free(store); + if (ret != 1) + ERR_print_errors_fp(stderr); + return ret; +} + +int main(void) +{ + CRYPTO_malloc_debug_init(); + CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL); + CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON); + + ERR_load_crypto_strings(); + OpenSSL_add_all_digests(); + + if (!test_alt_chains_cert_forgery()) { + fprintf(stderr, "Test alt chains cert forgery failed\n"); + return 1; + } + + EVP_cleanup(); + CRYPTO_cleanup_all_ex_data(); + ERR_remove_thread_state(NULL); + ERR_free_strings(); + CRYPTO_mem_leaks_fp(stderr); + + printf("PASS\n"); + return 0; +} |