1 files changed, 149 insertions, 0 deletions
diff --git a/dropbearconvert.c b/dropbearconvert.c
new file mode 100644
index 0000000..9e16fe7
--- /dev/null
+++ b/dropbearconvert.c
@@ -0,0 +1,149 @@
+/*
+ * Dropbear - a SSH2 server
+ * 
+ * Copyright (c) 2002,2003 Matt Johnston
+ * All rights reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE. */
+
+/* This program converts to/from Dropbear and OpenSSH private-key formats */
+#include "includes.h"
+#include "signkey.h"
+#include "buffer.h"
+#include "dbutil.h"
+#include "keyimport.h"
+
+
+static int do_convert(int intype, const char* infile, int outtype,
+		const char* outfile);
+
+static void printhelp(char * progname);
+
+static void printhelp(char * progname) {
+
+	fprintf(stderr, "Usage: %s <inputtype> <outputtype> <inputfile> <outputfile>\n\n"
+					"CAUTION: This program is for convenience only, and is not secure if used on\n"
+					"untrusted input files, ie it could allow arbitrary code execution.\n"
+					"All parameters must be specified in order.\n"
+					"\n"
+					"The input and output types are one of:\n"
+					"openssh\n"
+					"dropbear\n"
+					"\n"
+					"Example:\n"
+					"dropbearconvert openssh dropbear /etc/ssh/ssh_host_rsa_key /etc/dropbear_rsa_host_key\n",
+					progname);
+}
+
+#if defined(DBMULTI_dropbearconvert) || !defined(DROPBEAR_MULTI)
+#if defined(DBMULTI_dropbearconvert) && defined(DROPBEAR_MULTI)
+int dropbearconvert_main(int argc, char ** argv) {
+#else 
+int main(int argc, char ** argv) {
+#endif
+
+	int intype, outtype;
+	const char* infile;
+	const char* outfile;
+
+#ifdef DEBUG_TRACE
+	/* It's hard for it to get in the way _too_ much */
+	debug_trace = 1;
+#endif
+
+	/* get the commandline options */
+	if (argc != 5) {
+		fprintf(stderr, "All arguments must be specified\n");
+		goto usage;
+	}
+
+	/* input type */
+	if (argv[1][0] == 'd') {
+		intype = KEYFILE_DROPBEAR;
+	} else if (argv[1][0] == 'o') {
+		intype = KEYFILE_OPENSSH;
+	} else {
+		fprintf(stderr, "Invalid input key type\n");
+		goto usage;
+	}
+
+	/* output type */
+	if (argv[2][0] == 'd') {
+		outtype = KEYFILE_DROPBEAR;
+	} else if (argv[2][0] == 'o') {
+		outtype = KEYFILE_OPENSSH;
+	} else {
+		fprintf(stderr, "Invalid output key type\n");
+		goto usage;
+	}
+
+	/* we don't want output readable by others */
+	umask(077);
+
+	infile = argv[3];
+	outfile = argv[4];
+
+	return do_convert(intype, infile, outtype, outfile);
+
+usage:
+	printhelp(argv[0]);
+	return 1;
+}
+#endif
+
+static int do_convert(int intype, const char* infile, int outtype,
+		const char* outfile) {
+
+	sign_key * key = NULL;
+	char * keytype = NULL;
+	int ret = 1;
+
+	key = import_read(infile, NULL, intype);
+	if (!key) {
+		fprintf(stderr, "Error reading key from '%s'\n",
+				infile);
+		goto out;
+	}
+
+#ifdef DROPBEAR_RSA
+	if (key->rsakey != NULL) {
+		keytype = "RSA";
+	}
+#endif
+#ifdef DROPBEAR_DSS
+	if (key->dsskey != NULL) {
+		keytype = "DSS";
+	}
+#endif
+
+	fprintf(stderr, "Key is a %s key\n", keytype);
+
+	if (import_write(outfile, key, NULL, outtype) != 1) {
+		fprintf(stderr, "Error writing key to '%s'\n", outfile);
+	} else {
+		fprintf(stderr, "Wrote key to '%s'\n", outfile);
+		ret = 0;
+	}
+
+out:
+	if (key) {
+		sign_key_free(key);
+	}
+	return ret;
+}