2 * Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
12 #include <openssl/crypto.h>
13 #include <openssl/bio.h>
14 #include <openssl/x509.h>
15 #include <openssl/pem.h>
16 #include <openssl/err.h>
19 static const char *root_f;
20 static const char *roots_f;
21 static const char *untrusted_f;
22 static const char *bad_f;
23 static const char *req_f;
25 static X509 *load_cert_from_file(const char *filename)
30 bio = BIO_new_file(filename, "r");
32 cert = PEM_read_bio_X509(bio, NULL, 0, NULL);
37 static STACK_OF(X509) *load_certs_from_file(const char *filename)
39 STACK_OF(X509) *certs;
43 bio = BIO_new_file(filename, "r");
49 certs = sk_X509_new_null();
57 x = PEM_read_bio_X509(bio, NULL, 0, NULL);
58 if (x != NULL && !sk_X509_push(certs, x)) {
59 sk_X509_pop_free(certs, X509_free);
62 } else if (x == NULL) {
64 * We probably just ran out of certs, so ignore any errors
77 * Test for CVE-2015-1793 (Alternate Chains Certificate Forgery)
79 * Chain is as follows:
81 * rootCA (self-signed)
85 * subinterCA subinterCA (self-signed)
87 * leaf ------------------
91 * rootCA, interCA, subinterCA, subinterCA (ss) all have CA=TRUE
92 * leaf and bad have CA=FALSE
94 * subinterCA and subinterCA (ss) have the same subject name and keys
96 * interCA (but not rootCA) and subinterCA (ss) are in the trusted store
98 * leaf and subinterCA are in the untrusted list (untrusted.pem)
99 * bad is the certificate being verified (bad.pem)
101 * Versions vulnerable to CVE-2015-1793 will fail to detect that leaf has
102 * CA=FALSE, and will therefore incorrectly verify bad
105 static int test_alt_chains_cert_forgery(void)
110 STACK_OF(X509) *untrusted = NULL;
111 X509_STORE_CTX *sctx = NULL;
112 X509_STORE *store = NULL;
113 X509_LOOKUP *lookup = NULL;
115 store = X509_STORE_new();
119 lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file());
122 if (!X509_LOOKUP_load_file(lookup, roots_f, X509_FILETYPE_PEM))
125 untrusted = load_certs_from_file(untrusted_f);
127 if ((x = load_cert_from_file(bad_f)) == NULL)
130 sctx = X509_STORE_CTX_new();
134 if (!X509_STORE_CTX_init(sctx, store, x, untrusted))
137 i = X509_verify_cert(sctx);
139 if (i == 0 && X509_STORE_CTX_get_error(sctx) == X509_V_ERR_INVALID_CA) {
140 /* This is the result we were expecting: Test passed */
144 X509_STORE_CTX_free(sctx);
146 sk_X509_pop_free(untrusted, X509_free);
147 X509_STORE_free(store);
151 static int test_store_ctx(void)
153 X509_STORE_CTX *sctx = NULL;
155 int testresult = 0, ret;
157 x = load_cert_from_file(bad_f);
161 sctx = X509_STORE_CTX_new();
165 if (!X509_STORE_CTX_init(sctx, NULL, x, NULL))
168 /* Verifying a cert where we have no trusted certs should fail */
169 ret = X509_verify_cert(sctx);
172 /* This is the result we were expecting: Test passed */
177 X509_STORE_CTX_free(sctx);
182 OPT_TEST_DECLARE_USAGE("roots.pem untrusted.pem bad.pem\n")
184 static int test_distinguishing_id(void)
188 ASN1_OCTET_STRING *v = NULL, *v2 = NULL;
189 char *distid = "this is an ID";
191 x = load_cert_from_file(bad_f);
195 v = ASN1_OCTET_STRING_new();
199 if (!ASN1_OCTET_STRING_set(v, (unsigned char *)distid,
200 (int)strlen(distid))) {
201 ASN1_OCTET_STRING_free(v);
205 X509_set0_distinguishing_id(x, v);
207 v2 = X509_get0_distinguishing_id(x);
209 || !TEST_int_eq(ASN1_OCTET_STRING_cmp(v, v2), 0))
218 static int test_req_distinguishing_id(void)
223 ASN1_OCTET_STRING *v = NULL, *v2 = NULL;
224 char *distid = "this is an ID";
226 bio = BIO_new_file(req_f, "r");
230 x = PEM_read_bio_X509_REQ(bio, NULL, 0, NULL);
234 v = ASN1_OCTET_STRING_new();
238 if (!ASN1_OCTET_STRING_set(v, (unsigned char *)distid,
239 (int)strlen(distid))) {
240 ASN1_OCTET_STRING_free(v);
244 X509_REQ_set0_distinguishing_id(x, v);
246 v2 = X509_REQ_get0_distinguishing_id(x);
248 || !TEST_int_eq(ASN1_OCTET_STRING_cmp(v, v2), 0))
258 static int test_self_signed(const char *filename, int expected)
263 cert = load_cert_from_file(filename); /* may result in NULL */
264 ret = TEST_int_eq(X509_self_signed(cert, 1), expected);
269 static int test_self_signed_good(void)
271 return test_self_signed(root_f, 1);
274 static int test_self_signed_bad(void)
276 return test_self_signed(bad_f, 0);
279 static int test_self_signed_error(void)
281 return test_self_signed("nonexistent file name", -1);
284 int setup_tests(void)
286 if (!test_skip_common_options()) {
287 TEST_error("Error parsing test options\n");
291 if (!TEST_ptr(root_f = test_get_argument(0))
292 || !TEST_ptr(roots_f = test_get_argument(1))
293 || !TEST_ptr(untrusted_f = test_get_argument(2))
294 || !TEST_ptr(bad_f = test_get_argument(3))
295 || !TEST_ptr(req_f = test_get_argument(4)))
298 ADD_TEST(test_alt_chains_cert_forgery);
299 ADD_TEST(test_store_ctx);
300 ADD_TEST(test_distinguishing_id);
301 ADD_TEST(test_req_distinguishing_id);
302 ADD_TEST(test_self_signed_good);
303 ADD_TEST(test_self_signed_bad);
304 ADD_TEST(test_self_signed_error);