1 files changed, 99 insertions, 0 deletions
diff --git a/node_modules/sshpk/lib/formats/putty.js b/node_modules/sshpk/lib/formats/putty.js
new file mode 100644
index 000000000..344419f98
--- /dev/null
+++ b/node_modules/sshpk/lib/formats/putty.js
@@ -0,0 +1,99 @@
+// Copyright 2018 Joyent, Inc.
+
+module.exports = {
+	read: read,
+	write: write
+};
+
+var assert = require('assert-plus');
+var Buffer = require('safer-buffer').Buffer;
+var rfc4253 = require('./rfc4253');
+var Key = require('../key');
+
+var errors = require('../errors');
+
+function read(buf, options) {
+	var lines = buf.toString('ascii').split(/[\r\n]+/);
+	var found = false;
+	var parts;
+	var si = 0;
+	while (si < lines.length) {
+		parts = splitHeader(lines[si++]);
+		if (parts &&
+		    parts[0].toLowerCase() === 'putty-user-key-file-2') {
+			found = true;
+			break;
+		}
+	}
+	if (!found) {
+		throw (new Error('No PuTTY format first line found'));
+	}
+	var alg = parts[1];
+
+	parts = splitHeader(lines[si++]);
+	assert.equal(parts[0].toLowerCase(), 'encryption');
+
+	parts = splitHeader(lines[si++]);
+	assert.equal(parts[0].toLowerCase(), 'comment');
+	var comment = parts[1];
+
+	parts = splitHeader(lines[si++]);
+	assert.equal(parts[0].toLowerCase(), 'public-lines');
+	var publicLines = parseInt(parts[1], 10);
+	if (!isFinite(publicLines) || publicLines < 0 ||
+	    publicLines > lines.length) {
+		throw (new Error('Invalid public-lines count'));
+	}
+
+	var publicBuf = Buffer.from(
+	    lines.slice(si, si + publicLines).join(''), 'base64');
+	var keyType = rfc4253.algToKeyType(alg);
+	var key = rfc4253.read(publicBuf);
+	if (key.type !== keyType) {
+		throw (new Error('Outer key algorithm mismatch'));
+	}
+	key.comment = comment;
+	return (key);
+}
+
+function splitHeader(line) {
+	var idx = line.indexOf(':');
+	if (idx === -1)
+		return (null);
+	var header = line.slice(0, idx);
+	++idx;
+	while (line[idx] === ' ')
+		++idx;
+	var rest = line.slice(idx);
+	return ([header, rest]);
+}
+
+function write(key, options) {
+	assert.object(key);
+	if (!Key.isKey(key))
+		throw (new Error('Must be a public key'));
+
+	var alg = rfc4253.keyTypeToAlg(key);
+	var buf = rfc4253.write(key);
+	var comment = key.comment || '';
+
+	var b64 = buf.toString('base64');
+	var lines = wrap(b64, 64);
+
+	lines.unshift('Public-Lines: ' + lines.length);
+	lines.unshift('Comment: ' + comment);
+	lines.unshift('Encryption: none');
+	lines.unshift('PuTTY-User-Key-File-2: ' + alg);
+
+	return (Buffer.from(lines.join('\n') + '\n'));
+}
+
+function wrap(txt, len) {
+	var lines = [];
+	var pos = 0;
+	while (pos < txt.length) {
+		lines.push(txt.slice(pos, pos + 64));
+		pos += 64;
+	}
+	return (lines);
+}