Imported OpenSSL 1.1.1a

test/verify_extra_test.c

@@ -0,0 +1,190 @@
+/*
+ * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include <openssl/crypto.h>
+#include <openssl/bio.h>
+#include <openssl/x509.h>
+#include <openssl/pem.h>
+#include <openssl/err.h>
+#include "testutil.h"
+
+static const char *roots_f;
+static const char *untrusted_f;
+static const char *bad_f;
+
+static STACK_OF(X509) *load_certs_from_file(const char *filename)
+{
+    STACK_OF(X509) *certs;
+    BIO *bio;
+    X509 *x;
+
+    bio = BIO_new_file(filename, "r");
+
+    if (bio == NULL) {
+        return NULL;
+    }
+
+    certs = sk_X509_new_null();
+    if (certs == NULL) {
+        BIO_free(bio);
+        return NULL;
+    }
+
+    ERR_set_mark();
+    do {
+        x = PEM_read_bio_X509(bio, NULL, 0, NULL);
+        if (x != NULL && !sk_X509_push(certs, x)) {
+            sk_X509_pop_free(certs, X509_free);
+            BIO_free(bio);
+            return NULL;
+        } else if (x == NULL) {
+            /*
+             * We probably just ran out of certs, so ignore any errors
+             * generated
+             */
+            ERR_pop_to_mark();
+        }
+    } while (x != NULL);
+
+    BIO_free(bio);
+
+    return certs;
+}
+
+/*
+ * Test for CVE-2015-1793 (Alternate Chains Certificate Forgery)
+ *
+ * Chain is as follows:
+ *
+ * rootCA (self-signed)
+ *   |
+ * interCA
+ *   |
+ * subinterCA       subinterCA (self-signed)
+ *   |                   |
+ * leaf ------------------
+ *   |
+ * bad
+ *
+ * rootCA, interCA, subinterCA, subinterCA (ss) all have CA=TRUE
+ * leaf and bad have CA=FALSE
+ *
+ * subinterCA and subinterCA (ss) have the same subject name and keys
+ *
+ * interCA (but not rootCA) and subinterCA (ss) are in the trusted store
+ * (roots.pem)
+ * leaf and subinterCA are in the untrusted list (untrusted.pem)
+ * bad is the certificate being verified (bad.pem)
+ *
+ * Versions vulnerable to CVE-2015-1793 will fail to detect that leaf has
+ * CA=FALSE, and will therefore incorrectly verify bad
+ *
+ */
+static int test_alt_chains_cert_forgery(void)
+{
+    int ret = 0;
+    int i;
+    X509 *x = NULL;
+    STACK_OF(X509) *untrusted = NULL;
+    BIO *bio = NULL;
+    X509_STORE_CTX *sctx = NULL;
+    X509_STORE *store = NULL;
+    X509_LOOKUP *lookup = NULL;
+
+    store = X509_STORE_new();
+    if (store == NULL)
+        goto err;
+
+    lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file());
+    if (lookup == NULL)
+        goto err;
+    if (!X509_LOOKUP_load_file(lookup, roots_f, X509_FILETYPE_PEM))
+        goto err;
+
+    untrusted = load_certs_from_file(untrusted_f);
+
+    if ((bio = BIO_new_file(bad_f, "r")) == NULL)
+        goto err;
+
+    if ((x = PEM_read_bio_X509(bio, NULL, 0, NULL)) == NULL)
+        goto err;
+
+    sctx = X509_STORE_CTX_new();
+    if (sctx == NULL)
+        goto err;
+
+    if (!X509_STORE_CTX_init(sctx, store, x, untrusted))
+        goto err;
+
+    i = X509_verify_cert(sctx);
+
+    if (i == 0 && X509_STORE_CTX_get_error(sctx) == X509_V_ERR_INVALID_CA) {
+        /* This is the result we were expecting: Test passed */
+        ret = 1;
+    }
+ err:
+    X509_STORE_CTX_free(sctx);
+    X509_free(x);
+    BIO_free(bio);
+    sk_X509_pop_free(untrusted, X509_free);
+    X509_STORE_free(store);
+    return ret;
+}
+
+static int test_store_ctx(void)
+{
+    X509_STORE_CTX *sctx = NULL;
+    X509 *x = NULL;
+    BIO *bio = NULL;
+    int testresult = 0, ret;
+
+    bio = BIO_new_file(bad_f, "r");
+    if (bio == NULL)
+        goto err;
+
+    x = PEM_read_bio_X509(bio, NULL, 0, NULL);
+    if (x == NULL)
+        goto err;
+
+    sctx = X509_STORE_CTX_new();
+    if (sctx == NULL)
+        goto err;
+
+    if (!X509_STORE_CTX_init(sctx, NULL, x, NULL))
+        goto err;
+
+    /* Verifying a cert where we have no trusted certs should fail */
+    ret = X509_verify_cert(sctx);
+
+    if (ret == 0) {
+        /* This is the result we were expecting: Test passed */
+        testresult = 1;
+    }
+
+ err:
+    X509_STORE_CTX_free(sctx);
+    X509_free(x);
+    BIO_free(bio);
+    return testresult;
+}
+
+int setup_tests(void)
+{
+    if (!TEST_ptr(roots_f = test_get_argument(0))
+            || !TEST_ptr(untrusted_f = test_get_argument(1))
+            || !TEST_ptr(bad_f = test_get_argument(2))) {
+        TEST_error("usage: verify_extra_test roots.pem untrusted.pem bad.pem\n");
+        return 0;
+    }
+
+    ADD_TEST(test_alt_chains_cert_forgery);
+    ADD_TEST(test_store_ctx);
+    return 1;
+}