1 files changed, 159 insertions, 0 deletions
diff --git a/tools/pin.c b/tools/pin.c
new file mode 100644
index 0000000..8b2697e
--- /dev/null
+++ b/tools/pin.c
@@ -0,0 +1,159 @@
+/*
+ * Copyright (c) 2018 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
+ */
+
+#include <fido.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "../openbsd-compat/openbsd-compat.h"
+#include "extern.h"
+
+int
+pin_set(char *path)
+{
+	fido_dev_t *dev = NULL;
+	char prompt[1024];
+	char pin1[128];
+	char pin2[128];
+	int r;
+	int status = 1;
+
+	dev = open_dev(path);
+
+	r = snprintf(prompt, sizeof(prompt), "Enter new PIN for %s: ", path);
+	if (r < 0 || (size_t)r >= sizeof(prompt)) {
+		warnx("snprintf");
+		goto out;
+	}
+
+	if (!readpassphrase(prompt, pin1, sizeof(pin1), RPP_ECHO_OFF)) {
+		warnx("readpassphrase");
+		goto out;
+	}
+
+	r = snprintf(prompt, sizeof(prompt), "Enter the same PIN again: ");
+	if (r < 0 || (size_t)r >= sizeof(prompt)) {
+		warnx("snprintf");
+		goto out;
+	}
+
+	if (!readpassphrase(prompt, pin2, sizeof(pin2), RPP_ECHO_OFF)) {
+		warnx("readpassphrase");
+		goto out;
+	}
+
+	if (strcmp(pin1, pin2) != 0) {
+		fprintf(stderr, "PINs do not match. Try again.\n");
+		goto out;
+	}
+
+	if (strlen(pin1) < 4 || strlen(pin1) > 63) {
+		fprintf(stderr, "invalid PIN length\n");
+		goto out;
+	}
+
+	if ((r = fido_dev_set_pin(dev, pin1, NULL)) != FIDO_OK) {
+		warnx("fido_dev_set_pin: %s", fido_strerr(r));
+		goto out;
+	}
+
+	fido_dev_close(dev);
+	fido_dev_free(&dev);
+
+	status = 0;
+out:
+	explicit_bzero(pin1, sizeof(pin1));
+	explicit_bzero(pin2, sizeof(pin2));
+
+	exit(status);
+}
+
+int
+pin_change(char *path)
+{
+	fido_dev_t *dev = NULL;
+	char prompt[1024];
+	char pin0[128];
+	char pin1[128];
+	char pin2[128];
+	int r;
+	int status = 1;
+
+	if (path == NULL)
+		usage();
+
+	dev = open_dev(path);
+
+	r = snprintf(prompt, sizeof(prompt), "Enter current PIN for %s: ", path);
+	if (r < 0 || (size_t)r >= sizeof(prompt)) {
+		warnx("snprintf");
+		goto out;
+	}
+
+	if (!readpassphrase(prompt, pin0, sizeof(pin0), RPP_ECHO_OFF)) {
+		warnx("readpassphrase");
+		goto out;
+	}
+
+	if (strlen(pin0) < 4 || strlen(pin0) > 63) {
+		warnx("invalid PIN length");
+		goto out;
+	}
+
+	r = snprintf(prompt, sizeof(prompt), "Enter new PIN for %s: ", path);
+	if (r < 0 || (size_t)r >= sizeof(prompt)) {
+		warnx("snprintf");
+		goto out;
+	}
+
+	if (!readpassphrase(prompt, pin1, sizeof(pin1), RPP_ECHO_OFF)) {
+		warnx("readpassphrase");
+		goto out;
+	}
+
+	r = snprintf(prompt, sizeof(prompt), "Enter the same PIN again: ");
+	if (r < 0 || (size_t)r >= sizeof(prompt)) {
+		warnx("snprintf");
+		goto out;
+	}
+
+	if (!readpassphrase(prompt, pin2, sizeof(pin2), RPP_ECHO_OFF)) {
+		warnx("readpassphrase");
+		goto out;
+	}
+
+	if (strcmp(pin1, pin2) != 0) {
+		fprintf(stderr, "PINs do not match. Try again.\n");
+		goto out;
+	}
+
+	if (strlen(pin1) < 4 || strlen(pin1) > 63) {
+		fprintf(stderr, "invalid PIN length\n");
+		goto out;
+	}
+
+	if ((r = fido_dev_set_pin(dev, pin1, pin0)) != FIDO_OK) {
+		warnx("fido_dev_set_pin: %s", fido_strerr(r));
+		goto out;
+	}
+
+	fido_dev_close(dev);
+	fido_dev_free(&dev);
+
+	status = 0;
+out:
+	explicit_bzero(pin0, sizeof(pin0));
+	explicit_bzero(pin1, sizeof(pin1));
+	explicit_bzero(pin2, sizeof(pin2));
+
+	exit(status);
+}