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regress/eddsa.c

@@ -0,0 +1,159 @@
+/*
+ * 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) && LIBRESSL_VERSION_NUMBER < 0x3070000f
+	/* 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);
+}