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593e9c63 | 1 | /* |
6ec5fce2 | 2 | * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved. |
593e9c63 | 3 | * |
909f1a2e | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
440e5d80 RS |
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 | |
593e9c63 MC |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
ccf45361 | 11 | #include <string.h> |
593e9c63 MC |
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> | |
4afc6060 | 17 | #include "testutil.h" |
593e9c63 | 18 | |
ad887416 P |
19 | static const char *roots_f; |
20 | static const char *untrusted_f; | |
21 | static const char *bad_f; | |
22 | ||
593e9c63 MC |
23 | static STACK_OF(X509) *load_certs_from_file(const char *filename) |
24 | { | |
25 | STACK_OF(X509) *certs; | |
26 | BIO *bio; | |
27 | X509 *x; | |
28 | ||
29 | bio = BIO_new_file(filename, "r"); | |
30 | ||
31 | if (bio == NULL) { | |
32 | return NULL; | |
33 | } | |
34 | ||
35 | certs = sk_X509_new_null(); | |
36 | if (certs == NULL) { | |
37 | BIO_free(bio); | |
38 | return NULL; | |
39 | } | |
40 | ||
41 | ERR_set_mark(); | |
42 | do { | |
43 | x = PEM_read_bio_X509(bio, NULL, 0, NULL); | |
44 | if (x != NULL && !sk_X509_push(certs, x)) { | |
45 | sk_X509_pop_free(certs, X509_free); | |
46 | BIO_free(bio); | |
47 | return NULL; | |
48 | } else if (x == NULL) { | |
49 | /* | |
50 | * We probably just ran out of certs, so ignore any errors | |
51 | * generated | |
52 | */ | |
53 | ERR_pop_to_mark(); | |
54 | } | |
55 | } while (x != NULL); | |
56 | ||
57 | BIO_free(bio); | |
58 | ||
59 | return certs; | |
60 | } | |
61 | ||
62 | /* | |
63 | * Test for CVE-2015-1793 (Alternate Chains Certificate Forgery) | |
64 | * | |
65 | * Chain is as follows: | |
66 | * | |
67 | * rootCA (self-signed) | |
68 | * | | |
69 | * interCA | |
70 | * | | |
71 | * subinterCA subinterCA (self-signed) | |
72 | * | | | |
73 | * leaf ------------------ | |
74 | * | | |
75 | * bad | |
76 | * | |
77 | * rootCA, interCA, subinterCA, subinterCA (ss) all have CA=TRUE | |
78 | * leaf and bad have CA=FALSE | |
79 | * | |
80 | * subinterCA and subinterCA (ss) have the same subject name and keys | |
81 | * | |
82 | * interCA (but not rootCA) and subinterCA (ss) are in the trusted store | |
83 | * (roots.pem) | |
84 | * leaf and subinterCA are in the untrusted list (untrusted.pem) | |
85 | * bad is the certificate being verified (bad.pem) | |
86 | * | |
87 | * Versions vulnerable to CVE-2015-1793 will fail to detect that leaf has | |
88 | * CA=FALSE, and will therefore incorrectly verify bad | |
89 | * | |
90 | */ | |
ad887416 | 91 | static int test_alt_chains_cert_forgery(void) |
593e9c63 MC |
92 | { |
93 | int ret = 0; | |
94 | int i; | |
95 | X509 *x = NULL; | |
96 | STACK_OF(X509) *untrusted = NULL; | |
97 | BIO *bio = NULL; | |
98 | X509_STORE_CTX *sctx = NULL; | |
99 | X509_STORE *store = NULL; | |
100 | X509_LOOKUP *lookup = NULL; | |
101 | ||
102 | store = X509_STORE_new(); | |
103 | if (store == NULL) | |
104 | goto err; | |
105 | ||
106 | lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file()); | |
107 | if (lookup == NULL) | |
108 | goto err; | |
28b86f31 | 109 | if (!X509_LOOKUP_load_file(lookup, roots_f, X509_FILETYPE_PEM)) |
593e9c63 MC |
110 | goto err; |
111 | ||
e9daa815 | 112 | untrusted = load_certs_from_file(untrusted_f); |
593e9c63 | 113 | |
e9daa815 | 114 | if ((bio = BIO_new_file(bad_f, "r")) == NULL) |
593e9c63 MC |
115 | goto err; |
116 | ||
28b86f31 | 117 | if ((x = PEM_read_bio_X509(bio, NULL, 0, NULL)) == NULL) |
593e9c63 MC |
118 | goto err; |
119 | ||
120 | sctx = X509_STORE_CTX_new(); | |
121 | if (sctx == NULL) | |
122 | goto err; | |
123 | ||
124 | if (!X509_STORE_CTX_init(sctx, store, x, untrusted)) | |
125 | goto err; | |
126 | ||
127 | i = X509_verify_cert(sctx); | |
128 | ||
e8aa8b6c | 129 | if (i == 0 && X509_STORE_CTX_get_error(sctx) == X509_V_ERR_INVALID_CA) { |
593e9c63 MC |
130 | /* This is the result we were expecting: Test passed */ |
131 | ret = 1; | |
132 | } | |
133 | err: | |
134 | X509_STORE_CTX_free(sctx); | |
135 | X509_free(x); | |
136 | BIO_free(bio); | |
137 | sk_X509_pop_free(untrusted, X509_free); | |
138 | X509_STORE_free(store); | |
593e9c63 MC |
139 | return ret; |
140 | } | |
141 | ||
7f6dfa19 MC |
142 | static int test_store_ctx(void) |
143 | { | |
144 | X509_STORE_CTX *sctx = NULL; | |
145 | X509 *x = NULL; | |
146 | BIO *bio = NULL; | |
147 | int testresult = 0, ret; | |
148 | ||
149 | bio = BIO_new_file(bad_f, "r"); | |
150 | if (bio == NULL) | |
151 | goto err; | |
152 | ||
153 | x = PEM_read_bio_X509(bio, NULL, 0, NULL); | |
154 | if (x == NULL) | |
155 | goto err; | |
156 | ||
157 | sctx = X509_STORE_CTX_new(); | |
158 | if (sctx == NULL) | |
159 | goto err; | |
160 | ||
161 | if (!X509_STORE_CTX_init(sctx, NULL, x, NULL)) | |
162 | goto err; | |
163 | ||
164 | /* Verifying a cert where we have no trusted certs should fail */ | |
165 | ret = X509_verify_cert(sctx); | |
166 | ||
167 | if (ret == 0) { | |
168 | /* This is the result we were expecting: Test passed */ | |
169 | testresult = 1; | |
170 | } | |
171 | ||
172 | err: | |
173 | X509_STORE_CTX_free(sctx); | |
174 | X509_free(x); | |
175 | BIO_free(bio); | |
176 | return testresult; | |
177 | } | |
178 | ||
a43ce58f SL |
179 | OPT_TEST_DECLARE_USAGE("roots.pem untrusted.pem bad.pem\n") |
180 | ||
ccf45361 PY |
181 | #ifndef OPENSSL_NO_SM2 |
182 | static int test_sm2_id(void) | |
183 | { | |
184 | /* we only need an X509 structure, no matter if it's a real SM2 cert */ | |
185 | X509 *x = NULL; | |
186 | BIO *bio = NULL; | |
187 | int ret = 0; | |
188 | ASN1_OCTET_STRING *v = NULL, *v2 = NULL; | |
189 | char *sm2id = "this is an ID"; | |
190 | ||
191 | bio = BIO_new_file(bad_f, "r"); | |
192 | if (bio == NULL) | |
193 | goto err; | |
194 | ||
195 | x = PEM_read_bio_X509(bio, NULL, 0, NULL); | |
196 | if (x == NULL) | |
197 | goto err; | |
198 | ||
199 | v = ASN1_OCTET_STRING_new(); | |
200 | if (v == NULL) | |
201 | goto err; | |
202 | ||
203 | if (!ASN1_OCTET_STRING_set(v, (unsigned char *)sm2id, (int)strlen(sm2id))) { | |
204 | ASN1_OCTET_STRING_free(v); | |
205 | goto err; | |
206 | } | |
207 | ||
208 | X509_set0_sm2_id(x, v); | |
209 | ||
210 | v2 = X509_get0_sm2_id(x); | |
211 | if (!TEST_ptr(v2) | |
212 | || !TEST_int_eq(ASN1_OCTET_STRING_cmp(v, v2), 0)) | |
213 | goto err; | |
214 | ||
215 | ret = 1; | |
216 | err: | |
217 | X509_free(x); | |
218 | BIO_free(bio); | |
219 | return ret; | |
220 | } | |
221 | #endif | |
222 | ||
ad887416 | 223 | int setup_tests(void) |
593e9c63 | 224 | { |
ad887416 P |
225 | if (!TEST_ptr(roots_f = test_get_argument(0)) |
226 | || !TEST_ptr(untrusted_f = test_get_argument(1)) | |
a43ce58f | 227 | || !TEST_ptr(bad_f = test_get_argument(2))) |
ad887416 | 228 | return 0; |
593e9c63 | 229 | |
ad887416 | 230 | ADD_TEST(test_alt_chains_cert_forgery); |
7f6dfa19 | 231 | ADD_TEST(test_store_ctx); |
ccf45361 PY |
232 | #ifndef OPENSSL_NO_SM2 |
233 | ADD_TEST(test_sm2_id); | |
234 | #endif | |
ad887416 | 235 | return 1; |
593e9c63 | 236 | } |