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// Copyright 2016 Joyent, Inc.
module.exports = Certificate;
var assert = require('assert-plus');
var Buffer = require('safer-buffer').Buffer;
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 Key = require('./key');
var PrivateKey = require('./private-key');
var Identity = require('./identity');
var formats = {};
formats['openssh'] = require('./formats/openssh-cert');
formats['x509'] = require('./formats/x509');
formats['pem'] = require('./formats/x509-pem');
var CertificateParseError = errs.CertificateParseError;
var InvalidAlgorithmError = errs.InvalidAlgorithmError;
function Certificate(opts) {
assert.object(opts, 'options');
assert.arrayOfObject(opts.subjects, 'options.subjects');
utils.assertCompatible(opts.subjects[0], Identity, [1, 0],
'options.subjects');
utils.assertCompatible(opts.subjectKey, Key, [1, 0],
'options.subjectKey');
utils.assertCompatible(opts.issuer, Identity, [1, 0], 'options.issuer');
if (opts.issuerKey !== undefined) {
utils.assertCompatible(opts.issuerKey, Key, [1, 0],
'options.issuerKey');
}
assert.object(opts.signatures, 'options.signatures');
assert.buffer(opts.serial, 'options.serial');
assert.date(opts.validFrom, 'options.validFrom');
assert.date(opts.validUntil, 'optons.validUntil');
assert.optionalArrayOfString(opts.purposes, 'options.purposes');
this._hashCache = {};
this.subjects = opts.subjects;
this.issuer = opts.issuer;
this.subjectKey = opts.subjectKey;
this.issuerKey = opts.issuerKey;
this.signatures = opts.signatures;
this.serial = opts.serial;
this.validFrom = opts.validFrom;
this.validUntil = opts.validUntil;
this.purposes = opts.purposes;
}
Certificate.formats = formats;
Certificate.prototype.toBuffer = function (format, options) {
if (format === undefined)
format = 'x509';
assert.string(format, 'format');
assert.object(formats[format], 'formats[format]');
assert.optionalObject(options, 'options');
return (formats[format].write(this, options));
};
Certificate.prototype.toString = function (format, options) {
if (format === undefined)
format = 'pem';
return (this.toBuffer(format, options).toString());
};
Certificate.prototype.fingerprint = function (algo) {
if (algo === undefined)
algo = 'sha256';
assert.string(algo, 'algorithm');
var opts = {
type: 'certificate',
hash: this.hash(algo),
algorithm: algo
};
return (new Fingerprint(opts));
};
Certificate.prototype.hash = function (algo) {
assert.string(algo, 'algorithm');
algo = algo.toLowerCase();
if (algs.hashAlgs[algo] === undefined)
throw (new InvalidAlgorithmError(algo));
if (this._hashCache[algo])
return (this._hashCache[algo]);
var hash = crypto.createHash(algo).
update(this.toBuffer('x509')).digest();
this._hashCache[algo] = hash;
return (hash);
};
Certificate.prototype.isExpired = function (when) {
if (when === undefined)
when = new Date();
return (!((when.getTime() >= this.validFrom.getTime()) &&
(when.getTime() < this.validUntil.getTime())));
};
Certificate.prototype.isSignedBy = function (issuerCert) {
utils.assertCompatible(issuerCert, Certificate, [1, 0], 'issuer');
if (!this.issuer.equals(issuerCert.subjects[0]))
return (false);
if (this.issuer.purposes && this.issuer.purposes.length > 0 &&
this.issuer.purposes.indexOf('ca') === -1) {
return (false);
}
return (this.isSignedByKey(issuerCert.subjectKey));
};
Certificate.prototype.isSignedByKey = function (issuerKey) {
utils.assertCompatible(issuerKey, Key, [1, 2], 'issuerKey');
if (this.issuerKey !== undefined) {
return (this.issuerKey.
fingerprint('sha512').matches(issuerKey));
}
var fmt = Object.keys(this.signatures)[0];
var valid = formats[fmt].verify(this, issuerKey);
if (valid)
this.issuerKey = issuerKey;
return (valid);
};
Certificate.prototype.signWith = function (key) {
utils.assertCompatible(key, PrivateKey, [1, 2], 'key');
var fmts = Object.keys(formats);
var didOne = false;
for (var i = 0; i < fmts.length; ++i) {
if (fmts[i] !== 'pem') {
var ret = formats[fmts[i]].sign(this, key);
if (ret === true)
didOne = true;
}
}
if (!didOne) {
throw (new Error('Failed to sign the certificate for any ' +
'available certificate formats'));
}
};
Certificate.createSelfSigned = function (subjectOrSubjects, key, options) {
var subjects;
if (Array.isArray(subjectOrSubjects))
subjects = subjectOrSubjects;
else
subjects = [subjectOrSubjects];
assert.arrayOfObject(subjects);
subjects.forEach(function (subject) {
utils.assertCompatible(subject, Identity, [1, 0], 'subject');
});
utils.assertCompatible(key, PrivateKey, [1, 2], 'private key');
assert.optionalObject(options, 'options');
if (options === undefined)
options = {};
assert.optionalObject(options.validFrom, 'options.validFrom');
assert.optionalObject(options.validUntil, 'options.validUntil');
var validFrom = options.validFrom;
var validUntil = options.validUntil;
if (validFrom === undefined)
validFrom = new Date();
if (validUntil === undefined) {
assert.optionalNumber(options.lifetime, 'options.lifetime');
var lifetime = options.lifetime;
if (lifetime === undefined)
lifetime = 10*365*24*3600;
validUntil = new Date();
validUntil.setTime(validUntil.getTime() + lifetime*1000);
}
assert.optionalBuffer(options.serial, 'options.serial');
var serial = options.serial;
if (serial === undefined)
serial = Buffer.from('0000000000000001', 'hex');
var purposes = options.purposes;
if (purposes === undefined)
purposes = [];
if (purposes.indexOf('signature') === -1)
purposes.push('signature');
/* Self-signed certs are always CAs. */
if (purposes.indexOf('ca') === -1)
purposes.push('ca');
if (purposes.indexOf('crl') === -1)
purposes.push('crl');
/*
* If we weren't explicitly given any other purposes, do the sensible
* thing and add some basic ones depending on the subject type.
*/
if (purposes.length <= 3) {
var hostSubjects = subjects.filter(function (subject) {
return (subject.type === 'host');
});
var userSubjects = subjects.filter(function (subject) {
return (subject.type === 'user');
});
if (hostSubjects.length > 0) {
if (purposes.indexOf('serverAuth') === -1)
purposes.push('serverAuth');
}
if (userSubjects.length > 0) {
if (purposes.indexOf('clientAuth') === -1)
purposes.push('clientAuth');
}
if (userSubjects.length > 0 || hostSubjects.length > 0) {
if (purposes.indexOf('keyAgreement') === -1)
purposes.push('keyAgreement');
if (key.type === 'rsa' &&
purposes.indexOf('encryption') === -1)
purposes.push('encryption');
}
}
var cert = new Certificate({
subjects: subjects,
issuer: subjects[0],
subjectKey: key.toPublic(),
issuerKey: key.toPublic(),
signatures: {},
serial: serial,
validFrom: validFrom,
validUntil: validUntil,
purposes: purposes
});
cert.signWith(key);
return (cert);
};
Certificate.create =
function (subjectOrSubjects, key, issuer, issuerKey, options) {
var subjects;
if (Array.isArray(subjectOrSubjects))
subjects = subjectOrSubjects;
else
subjects = [subjectOrSubjects];
assert.arrayOfObject(subjects);
subjects.forEach(function (subject) {
utils.assertCompatible(subject, Identity, [1, 0], 'subject');
});
utils.assertCompatible(key, Key, [1, 0], 'key');
if (PrivateKey.isPrivateKey(key))
key = key.toPublic();
utils.assertCompatible(issuer, Identity, [1, 0], 'issuer');
utils.assertCompatible(issuerKey, PrivateKey, [1, 2], 'issuer key');
assert.optionalObject(options, 'options');
if (options === undefined)
options = {};
assert.optionalObject(options.validFrom, 'options.validFrom');
assert.optionalObject(options.validUntil, 'options.validUntil');
var validFrom = options.validFrom;
var validUntil = options.validUntil;
if (validFrom === undefined)
validFrom = new Date();
if (validUntil === undefined) {
assert.optionalNumber(options.lifetime, 'options.lifetime');
var lifetime = options.lifetime;
if (lifetime === undefined)
lifetime = 10*365*24*3600;
validUntil = new Date();
validUntil.setTime(validUntil.getTime() + lifetime*1000);
}
assert.optionalBuffer(options.serial, 'options.serial');
var serial = options.serial;
if (serial === undefined)
serial = Buffer.from('0000000000000001', 'hex');
var purposes = options.purposes;
if (purposes === undefined)
purposes = [];
if (purposes.indexOf('signature') === -1)
purposes.push('signature');
if (options.ca === true) {
if (purposes.indexOf('ca') === -1)
purposes.push('ca');
if (purposes.indexOf('crl') === -1)
purposes.push('crl');
}
var hostSubjects = subjects.filter(function (subject) {
return (subject.type === 'host');
});
var userSubjects = subjects.filter(function (subject) {
return (subject.type === 'user');
});
if (hostSubjects.length > 0) {
if (purposes.indexOf('serverAuth') === -1)
purposes.push('serverAuth');
}
if (userSubjects.length > 0) {
if (purposes.indexOf('clientAuth') === -1)
purposes.push('clientAuth');
}
if (userSubjects.length > 0 || hostSubjects.length > 0) {
if (purposes.indexOf('keyAgreement') === -1)
purposes.push('keyAgreement');
if (key.type === 'rsa' &&
purposes.indexOf('encryption') === -1)
purposes.push('encryption');
}
var cert = new Certificate({
subjects: subjects,
issuer: issuer,
subjectKey: key,
issuerKey: issuerKey.toPublic(),
signatures: {},
serial: serial,
validFrom: validFrom,
validUntil: validUntil,
purposes: purposes
});
cert.signWith(issuerKey);
return (cert);
};
Certificate.parse = function (data, format, options) {
if (typeof (data) !== 'string')
assert.buffer(data, 'data');
if (format === undefined)
format = 'auto';
assert.string(format, 'format');
if (typeof (options) === 'string')
options = { filename: options };
assert.optionalObject(options, 'options');
if (options === undefined)
options = {};
assert.optionalString(options.filename, 'options.filename');
if (options.filename === undefined)
options.filename = '(unnamed)';
assert.object(formats[format], 'formats[format]');
try {
var k = formats[format].read(data, options);
return (k);
} catch (e) {
throw (new CertificateParseError(options.filename, format, e));
}
};
Certificate.isCertificate = function (obj, ver) {
return (utils.isCompatible(obj, Certificate, ver));
};
/*
* API versions for Certificate:
* [1,0] -- initial ver
*/
Certificate.prototype._sshpkApiVersion = [1, 0];
Certificate._oldVersionDetect = function (obj) {
return ([1, 0]);
};