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 *roots_f
;
20 static const char *untrusted_f
;
21 static const char *bad_f
;
22 static const char *req_f
;
24 static STACK_OF(X509
) *load_certs_from_file(const char *filename
)
26 STACK_OF(X509
) *certs
;
30 bio
= BIO_new_file(filename
, "r");
36 certs
= sk_X509_new_null();
44 x
= PEM_read_bio_X509(bio
, NULL
, 0, NULL
);
45 if (x
!= NULL
&& !sk_X509_push(certs
, x
)) {
46 sk_X509_pop_free(certs
, X509_free
);
49 } else if (x
== NULL
) {
51 * We probably just ran out of certs, so ignore any errors
64 * Test for CVE-2015-1793 (Alternate Chains Certificate Forgery)
66 * Chain is as follows:
68 * rootCA (self-signed)
72 * subinterCA subinterCA (self-signed)
74 * leaf ------------------
78 * rootCA, interCA, subinterCA, subinterCA (ss) all have CA=TRUE
79 * leaf and bad have CA=FALSE
81 * subinterCA and subinterCA (ss) have the same subject name and keys
83 * interCA (but not rootCA) and subinterCA (ss) are in the trusted store
85 * leaf and subinterCA are in the untrusted list (untrusted.pem)
86 * bad is the certificate being verified (bad.pem)
88 * Versions vulnerable to CVE-2015-1793 will fail to detect that leaf has
89 * CA=FALSE, and will therefore incorrectly verify bad
92 static int test_alt_chains_cert_forgery(void)
97 STACK_OF(X509
) *untrusted
= NULL
;
99 X509_STORE_CTX
*sctx
= NULL
;
100 X509_STORE
*store
= NULL
;
101 X509_LOOKUP
*lookup
= NULL
;
103 store
= X509_STORE_new();
107 lookup
= X509_STORE_add_lookup(store
, X509_LOOKUP_file());
110 if (!X509_LOOKUP_load_file(lookup
, roots_f
, X509_FILETYPE_PEM
))
113 untrusted
= load_certs_from_file(untrusted_f
);
115 if ((bio
= BIO_new_file(bad_f
, "r")) == NULL
)
118 if ((x
= PEM_read_bio_X509(bio
, NULL
, 0, NULL
)) == NULL
)
121 sctx
= X509_STORE_CTX_new();
125 if (!X509_STORE_CTX_init(sctx
, store
, x
, untrusted
))
128 i
= X509_verify_cert(sctx
);
130 if (i
== 0 && X509_STORE_CTX_get_error(sctx
) == X509_V_ERR_INVALID_CA
) {
131 /* This is the result we were expecting: Test passed */
135 X509_STORE_CTX_free(sctx
);
138 sk_X509_pop_free(untrusted
, X509_free
);
139 X509_STORE_free(store
);
143 static int test_store_ctx(void)
145 X509_STORE_CTX
*sctx
= NULL
;
148 int testresult
= 0, ret
;
150 bio
= BIO_new_file(bad_f
, "r");
154 x
= PEM_read_bio_X509(bio
, NULL
, 0, NULL
);
158 sctx
= X509_STORE_CTX_new();
162 if (!X509_STORE_CTX_init(sctx
, NULL
, x
, NULL
))
165 /* Verifying a cert where we have no trusted certs should fail */
166 ret
= X509_verify_cert(sctx
);
169 /* This is the result we were expecting: Test passed */
174 X509_STORE_CTX_free(sctx
);
180 OPT_TEST_DECLARE_USAGE("roots.pem untrusted.pem bad.pem\n")
182 static int test_distinguishing_id(void)
187 ASN1_OCTET_STRING
*v
= NULL
, *v2
= NULL
;
188 char *distid
= "this is an ID";
190 bio
= BIO_new_file(bad_f
, "r");
194 x
= PEM_read_bio_X509(bio
, NULL
, 0, NULL
);
198 v
= ASN1_OCTET_STRING_new();
202 if (!ASN1_OCTET_STRING_set(v
, (unsigned char *)distid
,
203 (int)strlen(distid
))) {
204 ASN1_OCTET_STRING_free(v
);
208 X509_set0_distinguishing_id(x
, v
);
210 v2
= X509_get0_distinguishing_id(x
);
212 || !TEST_int_eq(ASN1_OCTET_STRING_cmp(v
, v2
), 0))
222 static int test_req_distinguishing_id(void)
227 ASN1_OCTET_STRING
*v
= NULL
, *v2
= NULL
;
228 char *distid
= "this is an ID";
230 bio
= BIO_new_file(req_f
, "r");
234 x
= PEM_read_bio_X509_REQ(bio
, NULL
, 0, NULL
);
238 v
= ASN1_OCTET_STRING_new();
242 if (!ASN1_OCTET_STRING_set(v
, (unsigned char *)distid
,
243 (int)strlen(distid
))) {
244 ASN1_OCTET_STRING_free(v
);
248 X509_REQ_set0_distinguishing_id(x
, v
);
250 v2
= X509_REQ_get0_distinguishing_id(x
);
252 || !TEST_int_eq(ASN1_OCTET_STRING_cmp(v
, v2
), 0))
262 int setup_tests(void)
264 if (!test_skip_common_options()) {
265 TEST_error("Error parsing test options\n");
269 if (!TEST_ptr(roots_f
= test_get_argument(0))
270 || !TEST_ptr(untrusted_f
= test_get_argument(1))
271 || !TEST_ptr(bad_f
= test_get_argument(2))
272 || !TEST_ptr(req_f
= test_get_argument(3)))
275 ADD_TEST(test_alt_chains_cert_forgery
);
276 ADD_TEST(test_store_ctx
);
277 ADD_TEST(test_distinguishing_id
);
278 ADD_TEST(test_req_distinguishing_id
);