2 * Copyright 2015-2021 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 #define load_cert_from_file(file) load_cert_pem(file, NULL)
28 * Test for CVE-2015-1793 (Alternate Chains Certificate Forgery)
30 * Chain is as follows:
32 * rootCA (self-signed)
36 * subinterCA subinterCA (self-signed)
38 * leaf ------------------
42 * rootCA, interCA, subinterCA, subinterCA (ss) all have CA=TRUE
43 * leaf and bad have CA=FALSE
45 * subinterCA and subinterCA (ss) have the same subject name and keys
47 * interCA (but not rootCA) and subinterCA (ss) are in the trusted store
49 * leaf and subinterCA are in the untrusted list (untrusted.pem)
50 * bad is the certificate being verified (bad.pem)
52 * Versions vulnerable to CVE-2015-1793 will fail to detect that leaf has
53 * CA=FALSE, and will therefore incorrectly verify bad
56 static int test_alt_chains_cert_forgery(void)
61 STACK_OF(X509) *untrusted = NULL;
62 X509_STORE_CTX *sctx = NULL;
63 X509_STORE *store = NULL;
64 X509_LOOKUP *lookup = NULL;
66 store = X509_STORE_new();
70 lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file());
73 if (!X509_LOOKUP_load_file(lookup, roots_f, X509_FILETYPE_PEM))
76 untrusted = load_certs_pem(untrusted_f);
78 if ((x = load_cert_from_file(bad_f)) == NULL)
81 sctx = X509_STORE_CTX_new();
85 if (!X509_STORE_CTX_init(sctx, store, x, untrusted))
88 i = X509_verify_cert(sctx);
90 if (i == 0 && X509_STORE_CTX_get_error(sctx) == X509_V_ERR_INVALID_CA) {
91 /* This is the result we were expecting: Test passed */
95 X509_STORE_CTX_free(sctx);
97 sk_X509_pop_free(untrusted, X509_free);
98 X509_STORE_free(store);
102 OPT_TEST_DECLARE_USAGE("roots.pem untrusted.pem bad.pem\n")
104 static int test_distinguishing_id(void)
108 ASN1_OCTET_STRING *v = NULL, *v2 = NULL;
109 char *distid = "this is an ID";
111 x = load_cert_from_file(bad_f);
115 v = ASN1_OCTET_STRING_new();
119 if (!ASN1_OCTET_STRING_set(v, (unsigned char *)distid,
120 (int)strlen(distid))) {
121 ASN1_OCTET_STRING_free(v);
125 X509_set0_distinguishing_id(x, v);
127 v2 = X509_get0_distinguishing_id(x);
129 || !TEST_int_eq(ASN1_OCTET_STRING_cmp(v, v2), 0))
138 static int test_req_distinguishing_id(void)
143 ASN1_OCTET_STRING *v = NULL, *v2 = NULL;
144 char *distid = "this is an ID";
146 bio = BIO_new_file(req_f, "r");
150 x = PEM_read_bio_X509_REQ(bio, NULL, 0, NULL);
154 v = ASN1_OCTET_STRING_new();
158 if (!ASN1_OCTET_STRING_set(v, (unsigned char *)distid,
159 (int)strlen(distid))) {
160 ASN1_OCTET_STRING_free(v);
164 X509_REQ_set0_distinguishing_id(x, v);
166 v2 = X509_REQ_get0_distinguishing_id(x);
168 || !TEST_int_eq(ASN1_OCTET_STRING_cmp(v, v2), 0))
178 static int test_self_signed(const char *filename, int use_trusted, int expected)
180 X509 *cert = load_cert_from_file(filename); /* may result in NULL */
181 STACK_OF(X509) *trusted = sk_X509_new_null();
182 X509_STORE_CTX *ctx = X509_STORE_CTX_new();
185 ret = TEST_int_eq(X509_self_signed(cert, 1), expected);
189 ret = ret && TEST_true(sk_X509_push(trusted, cert));
190 ret = ret && TEST_true(X509_STORE_CTX_init(ctx, NULL, cert, NULL));
191 X509_STORE_CTX_set0_trusted_stack(ctx, trusted);
192 ret = ret && TEST_int_eq(X509_verify_cert(ctx), expected);
195 X509_STORE_CTX_free(ctx);
196 sk_X509_free(trusted);
201 static int test_self_signed_good(void)
203 return test_self_signed(root_f, 1, 1);
206 static int test_self_signed_bad(void)
208 return test_self_signed(bad_f, 1, 0);
211 static int test_self_signed_error(void)
213 return test_self_signed("nonexistent file name", 1, -1);
216 static int test_store_ctx(void)
218 /* Verifying a cert where we have no trusted certs should fail */
219 return test_self_signed(bad_f, 0, 0);
222 int setup_tests(void)
224 if (!test_skip_common_options()) {
225 TEST_error("Error parsing test options\n");
229 if (!TEST_ptr(root_f = test_get_argument(0))
230 || !TEST_ptr(roots_f = test_get_argument(1))
231 || !TEST_ptr(untrusted_f = test_get_argument(2))
232 || !TEST_ptr(bad_f = test_get_argument(3))
233 || !TEST_ptr(req_f = test_get_argument(4)))
236 ADD_TEST(test_alt_chains_cert_forgery);
237 ADD_TEST(test_store_ctx);
238 ADD_TEST(test_distinguishing_id);
239 ADD_TEST(test_req_distinguishing_id);
240 ADD_TEST(test_self_signed_good);
241 ADD_TEST(test_self_signed_bad);
242 ADD_TEST(test_self_signed_error);