Add OCSP API test executable

Some of the OCSP APIs (such as the recently added OCSP_resp_get0_signer)
do not really merit inclusion in the ocsp(1) utility, but we should still
have unit tests for them.

For now, only test OCSP_resp_get0_signer(), but it should be easy to
add more tests in the future.

Provide an X509 cert and private key in the test's data directory
to use for signing responses, since constructing those on the fly
is more effort than is needed.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4573)

1 files changed, 137 insertions, 0 deletions

diff --git a/test/ocspapitest.c b/test/ocspapitest.c
new file mode 100644
index 0000000000..e76f724343
--- /dev/null
+++ b/test/ocspapitest.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright 2017 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 <string.h>
+
+#include <openssl/opensslconf.h>
+#include <openssl/crypto.h>
+#include <openssl/ocsp.h>
+#include <openssl/x509.h>
+#include <openssl/asn1.h>
+#include <openssl/pem.h>
+
+#include "testutil.h"
+
+static const char *certstr;
+static const char *privkeystr;
+
+static int get_cert_and_key(X509 **cert_out, EVP_PKEY **key_out)
+{
+    BIO *certbio, *keybio;
+    X509 *cert = NULL;
+    EVP_PKEY *key = NULL;
+
+    if (!TEST_ptr(certbio = BIO_new_file(certstr, "r")))
+        return 0;
+    cert = PEM_read_bio_X509(certbio, NULL, NULL, NULL);
+    BIO_free(certbio);
+    if (!TEST_ptr(keybio = BIO_new_file(privkeystr, "r")))
+        goto end;
+    key = PEM_read_bio_PrivateKey(keybio, NULL, NULL, NULL);
+    BIO_free(keybio);
+    if (!TEST_ptr(cert) || !TEST_ptr(key))
+        goto end;
+    *cert_out = cert;
+    *key_out = key;
+    return 1;
+ end:
+    X509_free(cert);
+    EVP_PKEY_free(key);
+    return 0;
+}
+
+static OCSP_BASICRESP *make_dummy_resp(void)
+{
+    const unsigned char namestr[] = "openssl.example.com";
+    unsigned char keybytes[128] = {7};
+    OCSP_BASICRESP *bs = OCSP_BASICRESP_new();
+    OCSP_CERTID *cid;
+    ASN1_TIME *thisupd = ASN1_TIME_set(NULL, time(NULL));
+    ASN1_TIME *nextupd = ASN1_TIME_set(NULL, time(NULL) + 200);
+    X509_NAME *name = X509_NAME_new();
+    ASN1_BIT_STRING *key = ASN1_BIT_STRING_new();
+    ASN1_INTEGER *serial = ASN1_INTEGER_new();
+
+    if (!X509_NAME_add_entry_by_NID(name, NID_commonName, MBSTRING_ASC,
+                                   namestr, -1, -1, 1)
+        || !ASN1_BIT_STRING_set(key, keybytes, sizeof(keybytes)
+        || !ASN1_INTEGER_set_uint64(serial, (uint64_t)1)))
+        return NULL;
+    cid = OCSP_cert_id_new(EVP_sha256(), name, key, serial);
+    if (!TEST_ptr(bs)
+        || !TEST_ptr(thisupd)
+        || !TEST_ptr(nextupd)
+        || !TEST_ptr(cid)
+        || !TEST_true(OCSP_basic_add1_status(bs, cid,
+                                             V_OCSP_CERTSTATUS_UNKNOWN,
+                                             0, NULL, thisupd, nextupd)))
+        return NULL;
+    ASN1_TIME_free(thisupd);
+    ASN1_TIME_free(nextupd);
+    ASN1_BIT_STRING_free(key);
+    ASN1_INTEGER_free(serial);
+    OCSP_CERTID_free(cid);
+    X509_NAME_free(name);
+    return bs;
+}
+
+#ifndef OPENSSL_NO_OCSP
+static int test_resp_signer(void)
+{
+    OCSP_BASICRESP *bs;
+    X509 *signer = NULL, *tmp;
+    EVP_PKEY *key = NULL;
+    STACK_OF(X509) *extra_certs;
+
+    /*
+     * Test a response with no certs at all; get the signer from the
+     * extra certs given to OCSP_resp_get0_signer().
+     */
+    bs = make_dummy_resp();
+    extra_certs = sk_X509_new_null();
+    if (!TEST_ptr(bs)
+        || !TEST_ptr(extra_certs)
+        || !TEST_true(get_cert_and_key(&signer, &key))
+        || !TEST_true(sk_X509_push(extra_certs, signer))
+        || !TEST_true(OCSP_basic_sign(bs, signer, key, EVP_sha1(),
+                                      NULL, OCSP_NOCERTS)))
+        return 0;
+    if (!TEST_true(OCSP_resp_get0_signer(bs, &tmp, extra_certs))
+        || !TEST_int_eq(X509_cmp(tmp, signer), 0))
+        return 0;
+    OCSP_BASICRESP_free(bs);
+
+    /* Do it again but include the signer cert */
+    bs = make_dummy_resp();
+    tmp = NULL;
+    if (!TEST_ptr(bs)
+        || !TEST_true(OCSP_basic_sign(bs, signer, key, EVP_sha1(),
+                                      NULL, 0)))
+        return 0;
+    if (!TEST_true(OCSP_resp_get0_signer(bs, &tmp, NULL))
+        || !TEST_int_eq(X509_cmp(tmp, signer), 0))
+        return 0;
+    OCSP_BASICRESP_free(bs);
+    sk_X509_free(extra_certs);
+    X509_free(signer);
+    EVP_PKEY_free(key);
+    return 1;
+}
+#endif
+
+int setup_tests(void)
+{
+    if (!TEST_ptr(certstr = test_get_argument(0))
+        || !TEST_ptr(privkeystr = test_get_argument(1)))
+        return 0;
+#ifndef OPENSSL_NO_OCSP
+    ADD_TEST(test_resp_signer);
+#endif
+    return 1;
+}