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// Copyright 2017 Joyent, Inc.
module.exports = Identity;
var assert = require('assert-plus');
var algs = require('./algs');
var crypto = require('crypto');
var Fingerprint = require('./fingerprint');
var Signature = require('./signature');
var errs = require('./errors');
var util = require('util');
var utils = require('./utils');
var asn1 = require('asn1');
var Buffer = require('safer-buffer').Buffer;
/*JSSTYLED*/
var DNS_NAME_RE = /^([*]|[a-z0-9][a-z0-9\-]{0,62})(?:\.([*]|[a-z0-9][a-z0-9\-]{0,62}))*$/i;
var oids = {};
oids.cn = '2.5.4.3';
oids.o = '2.5.4.10';
oids.ou = '2.5.4.11';
oids.l = '2.5.4.7';
oids.s = '2.5.4.8';
oids.c = '2.5.4.6';
oids.sn = '2.5.4.4';
oids.dc = '0.9.2342.19200300.100.1.25';
oids.uid = '0.9.2342.19200300.100.1.1';
oids.mail = '0.9.2342.19200300.100.1.3';
var unoids = {};
Object.keys(oids).forEach(function (k) {
unoids[oids[k]] = k;
});
function Identity(opts) {
var self = this;
assert.object(opts, 'options');
assert.arrayOfObject(opts.components, 'options.components');
this.components = opts.components;
this.componentLookup = {};
this.components.forEach(function (c) {
if (c.name && !c.oid)
c.oid = oids[c.name];
if (c.oid && !c.name)
c.name = unoids[c.oid];
if (self.componentLookup[c.name] === undefined)
self.componentLookup[c.name] = [];
self.componentLookup[c.name].push(c);
});
if (this.componentLookup.cn && this.componentLookup.cn.length > 0) {
this.cn = this.componentLookup.cn[0].value;
}
assert.optionalString(opts.type, 'options.type');
if (opts.type === undefined) {
if (this.components.length === 1 &&
this.componentLookup.cn &&
this.componentLookup.cn.length === 1 &&
this.componentLookup.cn[0].value.match(DNS_NAME_RE)) {
this.type = 'host';
this.hostname = this.componentLookup.cn[0].value;
} else if (this.componentLookup.dc &&
this.components.length === this.componentLookup.dc.length) {
this.type = 'host';
this.hostname = this.componentLookup.dc.map(
function (c) {
return (c.value);
}).join('.');
} else if (this.componentLookup.uid &&
this.components.length ===
this.componentLookup.uid.length) {
this.type = 'user';
this.uid = this.componentLookup.uid[0].value;
} else if (this.componentLookup.cn &&
this.componentLookup.cn.length === 1 &&
this.componentLookup.cn[0].value.match(DNS_NAME_RE)) {
this.type = 'host';
this.hostname = this.componentLookup.cn[0].value;
} else if (this.componentLookup.uid &&
this.componentLookup.uid.length === 1) {
this.type = 'user';
this.uid = this.componentLookup.uid[0].value;
} else if (this.componentLookup.mail &&
this.componentLookup.mail.length === 1) {
this.type = 'email';
this.email = this.componentLookup.mail[0].value;
} else if (this.componentLookup.cn &&
this.componentLookup.cn.length === 1) {
this.type = 'user';
this.uid = this.componentLookup.cn[0].value;
} else {
this.type = 'unknown';
}
} else {
this.type = opts.type;
if (this.type === 'host')
this.hostname = opts.hostname;
else if (this.type === 'user')
this.uid = opts.uid;
else if (this.type === 'email')
this.email = opts.email;
else
throw (new Error('Unknown type ' + this.type));
}
}
Identity.prototype.toString = function () {
return (this.components.map(function (c) {
return (c.name.toUpperCase() + '=' + c.value);
}).join(', '));
};
/*
* These are from X.680 -- PrintableString allowed chars are in section 37.4
* table 8. Spec for IA5Strings is "1,6 + SPACE + DEL" where 1 refers to
* ISO IR #001 (standard ASCII control characters) and 6 refers to ISO IR #006
* (the basic ASCII character set).
*/
/* JSSTYLED */
var NOT_PRINTABLE = /[^a-zA-Z0-9 '(),+.\/:=?-]/;
/* JSSTYLED */
var NOT_IA5 = /[^\x00-\x7f]/;
Identity.prototype.toAsn1 = function (der, tag) {
der.startSequence(tag);
this.components.forEach(function (c) {
der.startSequence(asn1.Ber.Constructor | asn1.Ber.Set);
der.startSequence();
der.writeOID(c.oid);
/*
* If we fit in a PrintableString, use that. Otherwise use an
* IA5String or UTF8String.
*
* If this identity was parsed from a DN, use the ASN.1 types
* from the original representation (otherwise this might not
* be a full match for the original in some validators).
*/
if (c.asn1type === asn1.Ber.Utf8String ||
c.value.match(NOT_IA5)) {
var v = Buffer.from(c.value, 'utf8');
der.writeBuffer(v, asn1.Ber.Utf8String);
} else if (c.asn1type === asn1.Ber.IA5String ||
c.value.match(NOT_PRINTABLE)) {
der.writeString(c.value, asn1.Ber.IA5String);
} else {
var type = asn1.Ber.PrintableString;
if (c.asn1type !== undefined)
type = c.asn1type;
der.writeString(c.value, type);
}
der.endSequence();
der.endSequence();
});
der.endSequence();
};
function globMatch(a, b) {
if (a === '**' || b === '**')
return (true);
var aParts = a.split('.');
var bParts = b.split('.');
if (aParts.length !== bParts.length)
return (false);
for (var i = 0; i < aParts.length; ++i) {
if (aParts[i] === '*' || bParts[i] === '*')
continue;
if (aParts[i] !== bParts[i])
return (false);
}
return (true);
}
Identity.prototype.equals = function (other) {
if (!Identity.isIdentity(other, [1, 0]))
return (false);
if (other.components.length !== this.components.length)
return (false);
for (var i = 0; i < this.components.length; ++i) {
if (this.components[i].oid !== other.components[i].oid)
return (false);
if (!globMatch(this.components[i].value,
other.components[i].value)) {
return (false);
}
}
return (true);
};
Identity.forHost = function (hostname) {
assert.string(hostname, 'hostname');
return (new Identity({
type: 'host',
hostname: hostname,
components: [ { name: 'cn', value: hostname } ]
}));
};
Identity.forUser = function (uid) {
assert.string(uid, 'uid');
return (new Identity({
type: 'user',
uid: uid,
components: [ { name: 'uid', value: uid } ]
}));
};
Identity.forEmail = function (email) {
assert.string(email, 'email');
return (new Identity({
type: 'email',
email: email,
components: [ { name: 'mail', value: email } ]
}));
};
Identity.parseDN = function (dn) {
assert.string(dn, 'dn');
var parts = dn.split(',');
var cmps = parts.map(function (c) {
c = c.trim();
var eqPos = c.indexOf('=');
var name = c.slice(0, eqPos).toLowerCase();
var value = c.slice(eqPos + 1);
return ({ name: name, value: value });
});
return (new Identity({ components: cmps }));
};
Identity.parseAsn1 = function (der, top) {
var components = [];
der.readSequence(top);
var end = der.offset + der.length;
while (der.offset < end) {
der.readSequence(asn1.Ber.Constructor | asn1.Ber.Set);
var after = der.offset + der.length;
der.readSequence();
var oid = der.readOID();
var type = der.peek();
var value;
switch (type) {
case asn1.Ber.PrintableString:
case asn1.Ber.IA5String:
case asn1.Ber.OctetString:
case asn1.Ber.T61String:
value = der.readString(type);
break;
case asn1.Ber.Utf8String:
value = der.readString(type, true);
value = value.toString('utf8');
break;
case asn1.Ber.CharacterString:
case asn1.Ber.BMPString:
value = der.readString(type, true);
value = value.toString('utf16le');
break;
default:
throw (new Error('Unknown asn1 type ' + type));
}
components.push({ oid: oid, asn1type: type, value: value });
der._offset = after;
}
der._offset = end;
return (new Identity({
components: components
}));
};
Identity.isIdentity = function (obj, ver) {
return (utils.isCompatible(obj, Identity, ver));
};
/*
* API versions for Identity:
* [1,0] -- initial ver
*/
Identity.prototype._sshpkApiVersion = [1, 0];
Identity._oldVersionDetect = function (obj) {
return ([1, 0]);
};