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/*
* Copyright (c) 2022 Yubico AB. All rights reserved.
* Use of this source code is governed by a BSD-style
* license that can be found in the LICENSE file.
* SPDX-License-Identifier: BSD-2-Clause
*/
#undef NDEBUG
#include <assert.h>
#include <string.h>
#define _FIDO_INTERNAL
#include <fido.h>
#include <fido/eddsa.h>
#include <openssl/bio.h>
#include <openssl/pem.h>
#define ASSERT_NOT_NULL(e) assert((e) != NULL)
#define ASSERT_NULL(e) assert((e) == NULL)
#define ASSERT_INVAL(e) assert((e) == FIDO_ERR_INVALID_ARGUMENT)
#define ASSERT_OK(e) assert((e) == FIDO_OK)
static const char ecdsa[] = \
"-----BEGIN PUBLIC KEY-----\n"
"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEOwiq14c80b7C1Jzsx5w1zMvk2GgW\n"
"5kfGMOKXjwF/U+51ZfBDKehs3ivdeXAJBkxIh7E3iA32s+HyNqk+ntl9fg==\n"
"-----END PUBLIC KEY-----\n";
static const char eddsa[] = \
"-----BEGIN PUBLIC KEY-----\n"
"MCowBQYDK2VwAyEADt/RHErAxAHxH9FUmsjOhQ2ALl6Y8nE0m3zQxkEE2iM=\n"
"-----END PUBLIC KEY-----\n";
static const unsigned char eddsa_raw[] = {
0x0e, 0xdf, 0xd1, 0x1c, 0x4a, 0xc0, 0xc4, 0x01,
0xf1, 0x1f, 0xd1, 0x54, 0x9a, 0xc8, 0xce, 0x85,
0x0d, 0x80, 0x2e, 0x5e, 0x98, 0xf2, 0x71, 0x34,
0x9b, 0x7c, 0xd0, 0xc6, 0x41, 0x04, 0xda, 0x23,
};
static EVP_PKEY *
EVP_PKEY_from_PEM(const char *ptr, size_t len)
{
BIO *bio = NULL;
EVP_PKEY *pkey = NULL;
if ((bio = BIO_new(BIO_s_mem())) == NULL) {
warnx("BIO_new");
goto out;
}
if (len > INT_MAX || BIO_write(bio, ptr, (int)len) != (int)len) {
warnx("BIO_write");
goto out;
}
if ((pkey = PEM_read_bio_PUBKEY(bio, NULL, NULL, NULL)) == NULL)
warnx("PEM_read_bio_PUBKEY");
out:
BIO_free(bio);
return pkey;
}
static int
eddsa_pk_cmp(const char *ptr, size_t len)
{
EVP_PKEY *pkA = NULL;
EVP_PKEY *pkB = NULL;
eddsa_pk_t *k = NULL;
int r, ok = -1;
if ((pkA = EVP_PKEY_from_PEM(ptr, len)) == NULL) {
warnx("EVP_PKEY_from_PEM");
goto out;
}
if ((k = eddsa_pk_new()) == NULL) {
warnx("eddsa_pk_new");
goto out;
}
if ((r = eddsa_pk_from_EVP_PKEY(k, pkA)) != FIDO_OK) {
warnx("eddsa_pk_from_EVP_PKEY: 0x%x", r);
goto out;
}
if ((pkB = eddsa_pk_to_EVP_PKEY(k)) == NULL) {
warnx("eddsa_pk_to_EVP_PKEY");
goto out;
}
if ((r = EVP_PKEY_cmp(pkA, pkB)) != 1) {
warnx("EVP_PKEY_cmp: %d", r);
goto out;
}
ok = 0;
out:
EVP_PKEY_free(pkA);
EVP_PKEY_free(pkB);
eddsa_pk_free(&k);
return ok;
}
static void
invalid_key(void)
{
EVP_PKEY *pkey;
eddsa_pk_t *pk;
ASSERT_NOT_NULL((pkey = EVP_PKEY_from_PEM(ecdsa, sizeof(ecdsa))));
ASSERT_NOT_NULL((pk = eddsa_pk_new()));
ASSERT_INVAL(eddsa_pk_from_EVP_PKEY(pk, pkey));
EVP_PKEY_free(pkey);
eddsa_pk_free(&pk);
}
static void
valid_key(void)
{
EVP_PKEY *pkeyA = NULL;
EVP_PKEY *pkeyB = NULL;
eddsa_pk_t *pkA = NULL;
eddsa_pk_t *pkB = NULL;
#if defined(LIBRESSL_VERSION_NUMBER)
/* incomplete support; test what we can */
ASSERT_NULL(EVP_PKEY_from_PEM(eddsa, sizeof(eddsa)));
ASSERT_NOT_NULL((pkB = eddsa_pk_new()));
ASSERT_INVAL(eddsa_pk_from_ptr(pkB, eddsa_raw, sizeof(eddsa_raw)));
ASSERT_NULL(eddsa_pk_to_EVP_PKEY((const eddsa_pk_t *)eddsa_raw));
assert(eddsa_pk_cmp(eddsa, sizeof(eddsa)) < 0);
#else
ASSERT_NOT_NULL((pkeyA = EVP_PKEY_from_PEM(eddsa, sizeof(eddsa))));
ASSERT_NOT_NULL((pkA = eddsa_pk_new()));
ASSERT_NOT_NULL((pkB = eddsa_pk_new()));
ASSERT_OK(eddsa_pk_from_EVP_PKEY(pkA, pkeyA));
ASSERT_OK(eddsa_pk_from_ptr(pkB, eddsa_raw, sizeof(eddsa_raw)));
ASSERT_NOT_NULL((pkeyB = eddsa_pk_to_EVP_PKEY((const eddsa_pk_t *)eddsa_raw)));
assert(EVP_PKEY_cmp(pkeyA, pkeyB) == 1);
assert(eddsa_pk_cmp(eddsa, sizeof(eddsa)) == 0);
#endif
EVP_PKEY_free(pkeyA);
EVP_PKEY_free(pkeyB);
eddsa_pk_free(&pkA);
eddsa_pk_free(&pkB);
}
int
main(void)
{
fido_init(0);
invalid_key();
valid_key();
exit(0);
}
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