1 files changed, 78 insertions, 0 deletions
diff --git a/key2root-crypt.c b/key2root-crypt.c
new file mode 100644
index 0000000..961e00c
--- /dev/null
+++ b/key2root-crypt.c
@@ -0,0 +1,78 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "arg.h"
+#include "crypt.h"
+
+
+char *argv0;
+
+
+static void
+usage(void)
+{
+	fprintf(stderr, "usage: %s [crypt-parameters]\n", argv0);
+	exit(1);
+}
+
+
+int
+main(int argc, char *argv[])
+{
+	const char *parameters;
+	char *key = NULL, *new;
+	size_t key_len = 0;
+	size_t key_size = 0;
+	char *hash;
+	ssize_t r;
+
+	ARGBEGIN {
+	default:
+		usage();
+	} ARGEND;
+
+	if (argc > 1)
+		usage();
+
+	parameters = argv[0];
+
+	for (;;) {
+		if (key_len == key_size) {
+			new = malloc(1 + (key_size += 1024));
+			if (!new) {
+				explicit_bzero(key, key_len);
+				fprintf(stderr, "%s: read <stdin>: %s\n", argv0, strerror(errno));
+				exit(1);
+			}
+			memcpy(new, key, key_len);
+			explicit_bzero(key, key_len);
+			free(key);
+			key = new;
+		}
+		r = read(STDIN_FILENO, &key[key_len], key_size - key_len);
+		if (r <= 0) {
+			if (!r)
+				break;
+			explicit_bzero(key, key_len);
+			fprintf(stderr, "%s: read <stdin>: %s\n", argv0, strerror(errno));
+			exit(1);
+		}
+		key_len += (size_t)r;
+	}
+	hash = key2root_crypt(key, key_len, parameters, 1);
+	if (!hash)
+		exit(1);
+	free(key);
+	printf("%s\n", hash);
+	free(hash);
+
+	if (fflush(stdout) || ferror(stdout) || fclose(stdout)) {
+		fprintf(stderr, "%s: printf: %s\n", argv0, strerror(errno));
+		exit(1);
+	}
+	return 0;
+}