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>
21 static const char *roots_f;
22 static const char *untrusted_f;
23 static const char *bad_f;
24 static const char *req_f;
26 static STACK_OF(X509) *load_certs_from_file(const char *filename)
28 STACK_OF(X509) *certs;
32 bio = BIO_new_file(filename, "r");
38 certs = sk_X509_new_null();
46 x = PEM_read_bio_X509(bio, NULL, 0, NULL);
47 if (x != NULL && !sk_X509_push(certs, x)) {
48 sk_X509_pop_free(certs, X509_free);
51 } else if (x == NULL) {
53 * We probably just ran out of certs, so ignore any errors
66 * Test for CVE-2015-1793 (Alternate Chains Certificate Forgery)
68 * Chain is as follows:
70 * rootCA (self-signed)
74 * subinterCA subinterCA (self-signed)
76 * leaf ------------------
80 * rootCA, interCA, subinterCA, subinterCA (ss) all have CA=TRUE
81 * leaf and bad have CA=FALSE
83 * subinterCA and subinterCA (ss) have the same subject name and keys
85 * interCA (but not rootCA) and subinterCA (ss) are in the trusted store
87 * leaf and subinterCA are in the untrusted list (untrusted.pem)
88 * bad is the certificate being verified (bad.pem)
90 * Versions vulnerable to CVE-2015-1793 will fail to detect that leaf has
91 * CA=FALSE, and will therefore incorrectly verify bad
94 static int test_alt_chains_cert_forgery(void)
99 STACK_OF(X509) *untrusted = NULL;
101 X509_STORE_CTX *sctx = NULL;
102 X509_STORE *store = NULL;
103 X509_LOOKUP *lookup = NULL;
105 store = X509_STORE_new();
109 lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file());
112 if (!X509_LOOKUP_load_file(lookup, roots_f, X509_FILETYPE_PEM))
115 untrusted = load_certs_from_file(untrusted_f);
117 if ((bio = BIO_new_file(bad_f, "r")) == NULL)
120 if ((x = PEM_read_bio_X509(bio, NULL, 0, NULL)) == NULL)
123 sctx = X509_STORE_CTX_new();
127 if (!X509_STORE_CTX_init(sctx, store, x, untrusted))
130 i = X509_verify_cert(sctx);
132 if (i == 0 && X509_STORE_CTX_get_error(sctx) == X509_V_ERR_INVALID_CA) {
133 /* This is the result we were expecting: Test passed */
137 X509_STORE_CTX_free(sctx);
140 sk_X509_pop_free(untrusted, X509_free);
141 X509_STORE_free(store);
145 static int test_store_ctx(void)
147 X509_STORE_CTX *sctx = NULL;
150 int testresult = 0, ret;
152 bio = BIO_new_file(bad_f, "r");
156 x = PEM_read_bio_X509(bio, NULL, 0, NULL);
160 sctx = X509_STORE_CTX_new();
164 if (!X509_STORE_CTX_init(sctx, NULL, x, NULL))
167 /* Verifying a cert where we have no trusted certs should fail */
168 ret = X509_verify_cert(sctx);
171 /* This is the result we were expecting: Test passed */
176 X509_STORE_CTX_free(sctx);
182 OPT_TEST_DECLARE_USAGE("roots.pem untrusted.pem bad.pem\n")
184 static int test_distinguishing_id(void)
189 ASN1_OCTET_STRING *v = NULL, *v2 = NULL;
190 char *distid = "this is an ID";
192 bio = BIO_new_file(bad_f, "r");
196 x = PEM_read_bio_X509(bio, NULL, 0, NULL);
200 v = ASN1_OCTET_STRING_new();
204 if (!ASN1_OCTET_STRING_set(v, (unsigned char *)distid,
205 (int)strlen(distid))) {
206 ASN1_OCTET_STRING_free(v);
210 X509_set0_distinguishing_id(x, v);
212 v2 = X509_get0_distinguishing_id(x);
214 || !TEST_int_eq(ASN1_OCTET_STRING_cmp(v, v2), 0))
224 static int test_req_distinguishing_id(void)
229 ASN1_OCTET_STRING *v = NULL, *v2 = NULL;
230 char *distid = "this is an ID";
232 bio = BIO_new_file(req_f, "r");
236 x = PEM_read_bio_X509_REQ(bio, NULL, 0, NULL);
240 v = ASN1_OCTET_STRING_new();
244 if (!ASN1_OCTET_STRING_set(v, (unsigned char *)distid,
245 (int)strlen(distid))) {
246 ASN1_OCTET_STRING_free(v);
250 X509_REQ_set0_distinguishing_id(x, v);
252 v2 = X509_REQ_get0_distinguishing_id(x);
254 || !TEST_int_eq(ASN1_OCTET_STRING_cmp(v, v2), 0))
264 int setup_tests(void)
266 if (!test_skip_common_options()) {
267 TEST_error("Error parsing test options\n");
271 if (!TEST_ptr(roots_f = test_get_argument(0))
272 || !TEST_ptr(untrusted_f = test_get_argument(1))
273 || !TEST_ptr(bad_f = test_get_argument(2))
274 || !TEST_ptr(req_f = test_get_argument(3)))
277 ADD_TEST(test_alt_chains_cert_forgery);
278 ADD_TEST(test_store_ctx);
279 ADD_TEST(test_distinguishing_id);
280 ADD_TEST(test_req_distinguishing_id);