Added export_allowed file to make repository visible in cgit

1 files changed, 352 insertions, 0 deletions

diff --git a/node_modules/sshpk/lib/formats/openssh-cert.js b/node_modules/sshpk/lib/formats/openssh-cert.js
new file mode 100644
index 0000000..766f3d3
--- /dev/null
+++ b/node_modules/sshpk/lib/formats/openssh-cert.js
@@ -0,0 +1,352 @@
+// Copyright 2017 Joyent, Inc.
+
+module.exports = {
+	read: read,
+	verify: verify,
+	sign: sign,
+	signAsync: signAsync,
+	write: write,
+
+	/* Internal private API */
+	fromBuffer: fromBuffer,
+	toBuffer: toBuffer
+};
+
+var assert = require('assert-plus');
+var SSHBuffer = require('../ssh-buffer');
+var crypto = require('crypto');
+var Buffer = require('safer-buffer').Buffer;
+var algs = require('../algs');
+var Key = require('../key');
+var PrivateKey = require('../private-key');
+var Identity = require('../identity');
+var rfc4253 = require('./rfc4253');
+var Signature = require('../signature');
+var utils = require('../utils');
+var Certificate = require('../certificate');
+
+function verify(cert, key) {
+	/*
+	 * We always give an issuerKey, so if our verify() is being called then
+	 * there was no signature. Return false.
+	 */
+	return (false);
+}
+
+var TYPES = {
+	'user': 1,
+	'host': 2
+};
+Object.keys(TYPES).forEach(function (k) { TYPES[TYPES[k]] = k; });
+
+var ECDSA_ALGO = /^ecdsa-sha2-([^@-]+)-cert-v01@openssh.com$/;
+
+function read(buf, options) {
+	if (Buffer.isBuffer(buf))
+		buf = buf.toString('ascii');
+	var parts = buf.trim().split(/[ \t\n]+/g);
+	if (parts.length < 2 || parts.length > 3)
+		throw (new Error('Not a valid SSH certificate line'));
+
+	var algo = parts[0];
+	var data = parts[1];
+
+	data = Buffer.from(data, 'base64');
+	return (fromBuffer(data, algo));
+}
+
+function fromBuffer(data, algo, partial) {
+	var sshbuf = new SSHBuffer({ buffer: data });
+	var innerAlgo = sshbuf.readString();
+	if (algo !== undefined && innerAlgo !== algo)
+		throw (new Error('SSH certificate algorithm mismatch'));
+	if (algo === undefined)
+		algo = innerAlgo;
+
+	var cert = {};
+	cert.signatures = {};
+	cert.signatures.openssh = {};
+
+	cert.signatures.openssh.nonce = sshbuf.readBuffer();
+
+	var key = {};
+	var parts = (key.parts = []);
+	key.type = getAlg(algo);
+
+	var partCount = algs.info[key.type].parts.length;
+	while (parts.length < partCount)
+		parts.push(sshbuf.readPart());
+	assert.ok(parts.length >= 1, 'key must have at least one part');
+
+	var algInfo = algs.info[key.type];
+	if (key.type === 'ecdsa') {
+		var res = ECDSA_ALGO.exec(algo);
+		assert.ok(res !== null);
+		assert.strictEqual(res[1], parts[0].data.toString());
+	}
+
+	for (var i = 0; i < algInfo.parts.length; ++i) {
+		parts[i].name = algInfo.parts[i];
+		if (parts[i].name !== 'curve' &&
+		    algInfo.normalize !== false) {
+			var p = parts[i];
+			p.data = utils.mpNormalize(p.data);
+		}
+	}
+
+	cert.subjectKey = new Key(key);
+
+	cert.serial = sshbuf.readInt64();
+
+	var type = TYPES[sshbuf.readInt()];
+	assert.string(type, 'valid cert type');
+
+	cert.signatures.openssh.keyId = sshbuf.readString();
+
+	var principals = [];
+	var pbuf = sshbuf.readBuffer();
+	var psshbuf = new SSHBuffer({ buffer: pbuf });
+	while (!psshbuf.atEnd())
+		principals.push(psshbuf.readString());
+	if (principals.length === 0)
+		principals = ['*'];
+
+	cert.subjects = principals.map(function (pr) {
+		if (type === 'user')
+			return (Identity.forUser(pr));
+		else if (type === 'host')
+			return (Identity.forHost(pr));
+		throw (new Error('Unknown identity type ' + type));
+	});
+
+	cert.validFrom = int64ToDate(sshbuf.readInt64());
+	cert.validUntil = int64ToDate(sshbuf.readInt64());
+
+	var exts = [];
+	var extbuf = new SSHBuffer({ buffer: sshbuf.readBuffer() });
+	var ext;
+	while (!extbuf.atEnd()) {
+		ext = { critical: true };
+		ext.name = extbuf.readString();
+		ext.data = extbuf.readBuffer();
+		exts.push(ext);
+	}
+	extbuf = new SSHBuffer({ buffer: sshbuf.readBuffer() });
+	while (!extbuf.atEnd()) {
+		ext = { critical: false };
+		ext.name = extbuf.readString();
+		ext.data = extbuf.readBuffer();
+		exts.push(ext);
+	}
+	cert.signatures.openssh.exts = exts;
+
+	/* reserved */
+	sshbuf.readBuffer();
+
+	var signingKeyBuf = sshbuf.readBuffer();
+	cert.issuerKey = rfc4253.read(signingKeyBuf);
+
+	/*
+	 * OpenSSH certs don't give the identity of the issuer, just their
+	 * public key. So, we use an Identity that matches anything. The
+	 * isSignedBy() function will later tell you if the key matches.
+	 */
+	cert.issuer = Identity.forHost('**');
+
+	var sigBuf = sshbuf.readBuffer();
+	cert.signatures.openssh.signature =
+	    Signature.parse(sigBuf, cert.issuerKey.type, 'ssh');
+
+	if (partial !== undefined) {
+		partial.remainder = sshbuf.remainder();
+		partial.consumed = sshbuf._offset;
+	}
+
+	return (new Certificate(cert));
+}
+
+function int64ToDate(buf) {
+	var i = buf.readUInt32BE(0) * 4294967296;
+	i += buf.readUInt32BE(4);
+	var d = new Date();
+	d.setTime(i * 1000);
+	d.sourceInt64 = buf;
+	return (d);
+}
+
+function dateToInt64(date) {
+	if (date.sourceInt64 !== undefined)
+		return (date.sourceInt64);
+	var i = Math.round(date.getTime() / 1000);
+	var upper = Math.floor(i / 4294967296);
+	var lower = Math.floor(i % 4294967296);
+	var buf = Buffer.alloc(8);
+	buf.writeUInt32BE(upper, 0);
+	buf.writeUInt32BE(lower, 4);
+	return (buf);
+}
+
+function sign(cert, key) {
+	if (cert.signatures.openssh === undefined)
+		cert.signatures.openssh = {};
+	try {
+		var blob = toBuffer(cert, true);
+	} catch (e) {
+		delete (cert.signatures.openssh);
+		return (false);
+	}
+	var sig = cert.signatures.openssh;
+	var hashAlgo = undefined;
+	if (key.type === 'rsa' || key.type === 'dsa')
+		hashAlgo = 'sha1';
+	var signer = key.createSign(hashAlgo);
+	signer.write(blob);
+	sig.signature = signer.sign();
+	return (true);
+}
+
+function signAsync(cert, signer, done) {
+	if (cert.signatures.openssh === undefined)
+		cert.signatures.openssh = {};
+	try {
+		var blob = toBuffer(cert, true);
+	} catch (e) {
+		delete (cert.signatures.openssh);
+		done(e);
+		return;
+	}
+	var sig = cert.signatures.openssh;
+
+	signer(blob, function (err, signature) {
+		if (err) {
+			done(err);
+			return;
+		}
+		try {
+			/*
+			 * This will throw if the signature isn't of a
+			 * type/algo that can be used for SSH.
+			 */
+			signature.toBuffer('ssh');
+		} catch (e) {
+			done(e);
+			return;
+		}
+		sig.signature = signature;
+		done();
+	});
+}
+
+function write(cert, options) {
+	if (options === undefined)
+		options = {};
+
+	var blob = toBuffer(cert);
+	var out = getCertType(cert.subjectKey) + ' ' + blob.toString('base64');
+	if (options.comment)
+		out = out + ' ' + options.comment;
+	return (out);
+}
+
+
+function toBuffer(cert, noSig) {
+	assert.object(cert.signatures.openssh, 'signature for openssh format');
+	var sig = cert.signatures.openssh;
+
+	if (sig.nonce === undefined)
+		sig.nonce = crypto.randomBytes(16);
+	var buf = new SSHBuffer({});
+	buf.writeString(getCertType(cert.subjectKey));
+	buf.writeBuffer(sig.nonce);
+
+	var key = cert.subjectKey;
+	var algInfo = algs.info[key.type];
+	algInfo.parts.forEach(function (part) {
+		buf.writePart(key.part[part]);
+	});
+
+	buf.writeInt64(cert.serial);
+
+	var type = cert.subjects[0].type;
+	assert.notStrictEqual(type, 'unknown');
+	cert.subjects.forEach(function (id) {
+		assert.strictEqual(id.type, type);
+	});
+	type = TYPES[type];
+	buf.writeInt(type);
+
+	if (sig.keyId === undefined) {
+		sig.keyId = cert.subjects[0].type + '_' +
+		    (cert.subjects[0].uid || cert.subjects[0].hostname);
+	}
+	buf.writeString(sig.keyId);
+
+	var sub = new SSHBuffer({});
+	cert.subjects.forEach(function (id) {
+		if (type === TYPES.host)
+			sub.writeString(id.hostname);
+		else if (type === TYPES.user)
+			sub.writeString(id.uid);
+	});
+	buf.writeBuffer(sub.toBuffer());
+
+	buf.writeInt64(dateToInt64(cert.validFrom));
+	buf.writeInt64(dateToInt64(cert.validUntil));
+
+	var exts = sig.exts;
+	if (exts === undefined)
+		exts = [];
+
+	var extbuf = new SSHBuffer({});
+	exts.forEach(function (ext) {
+		if (ext.critical !== true)
+			return;
+		extbuf.writeString(ext.name);
+		extbuf.writeBuffer(ext.data);
+	});
+	buf.writeBuffer(extbuf.toBuffer());
+
+	extbuf = new SSHBuffer({});
+	exts.forEach(function (ext) {
+		if (ext.critical === true)
+			return;
+		extbuf.writeString(ext.name);
+		extbuf.writeBuffer(ext.data);
+	});
+	buf.writeBuffer(extbuf.toBuffer());
+
+	/* reserved */
+	buf.writeBuffer(Buffer.alloc(0));
+
+	sub = rfc4253.write(cert.issuerKey);
+	buf.writeBuffer(sub);
+
+	if (!noSig)
+		buf.writeBuffer(sig.signature.toBuffer('ssh'));
+
+	return (buf.toBuffer());
+}
+
+function getAlg(certType) {
+	if (certType === 'ssh-rsa-cert-v01@openssh.com')
+		return ('rsa');
+	if (certType === 'ssh-dss-cert-v01@openssh.com')
+		return ('dsa');
+	if (certType.match(ECDSA_ALGO))
+		return ('ecdsa');
+	if (certType === 'ssh-ed25519-cert-v01@openssh.com')
+		return ('ed25519');
+	throw (new Error('Unsupported cert type ' + certType));
+}
+
+function getCertType(key) {
+	if (key.type === 'rsa')
+		return ('ssh-rsa-cert-v01@openssh.com');
+	if (key.type === 'dsa')
+		return ('ssh-dss-cert-v01@openssh.com');
+	if (key.type === 'ecdsa')
+		return ('ecdsa-sha2-' + key.curve + '-cert-v01@openssh.com');
+	if (key.type === 'ed25519')
+		return ('ssh-ed25519-cert-v01@openssh.com');
+	throw (new Error('Unsupported key type ' + key.type));
+}