| // from https://github.com/Rantanen/node-dtls/blob/25a7dc861bda38cfeac93a723500eea4f0ac2e86/Certificate.js | 
| // thanks to @Rantanen | 
|   | 
| 'use strict' | 
|   | 
| var asn = require('asn1.js') | 
|   | 
| var Time = asn.define('Time', function () { | 
|   this.choice({ | 
|     utcTime: this.utctime(), | 
|     generalTime: this.gentime() | 
|   }) | 
| }) | 
|   | 
| var AttributeTypeValue = asn.define('AttributeTypeValue', function () { | 
|   this.seq().obj( | 
|     this.key('type').objid(), | 
|     this.key('value').any() | 
|   ) | 
| }) | 
|   | 
| var AlgorithmIdentifier = asn.define('AlgorithmIdentifier', function () { | 
|   this.seq().obj( | 
|     this.key('algorithm').objid(), | 
|     this.key('parameters').optional(), | 
|     this.key('curve').objid().optional() | 
|   ) | 
| }) | 
|   | 
| var SubjectPublicKeyInfo = asn.define('SubjectPublicKeyInfo', function () { | 
|   this.seq().obj( | 
|     this.key('algorithm').use(AlgorithmIdentifier), | 
|     this.key('subjectPublicKey').bitstr() | 
|   ) | 
| }) | 
|   | 
| var RelativeDistinguishedName = asn.define('RelativeDistinguishedName', function () { | 
|   this.setof(AttributeTypeValue) | 
| }) | 
|   | 
| var RDNSequence = asn.define('RDNSequence', function () { | 
|   this.seqof(RelativeDistinguishedName) | 
| }) | 
|   | 
| var Name = asn.define('Name', function () { | 
|   this.choice({ | 
|     rdnSequence: this.use(RDNSequence) | 
|   }) | 
| }) | 
|   | 
| var Validity = asn.define('Validity', function () { | 
|   this.seq().obj( | 
|     this.key('notBefore').use(Time), | 
|     this.key('notAfter').use(Time) | 
|   ) | 
| }) | 
|   | 
| var Extension = asn.define('Extension', function () { | 
|   this.seq().obj( | 
|     this.key('extnID').objid(), | 
|     this.key('critical').bool().def(false), | 
|     this.key('extnValue').octstr() | 
|   ) | 
| }) | 
|   | 
| var TBSCertificate = asn.define('TBSCertificate', function () { | 
|   this.seq().obj( | 
|     this.key('version').explicit(0).int().optional(), | 
|     this.key('serialNumber').int(), | 
|     this.key('signature').use(AlgorithmIdentifier), | 
|     this.key('issuer').use(Name), | 
|     this.key('validity').use(Validity), | 
|     this.key('subject').use(Name), | 
|     this.key('subjectPublicKeyInfo').use(SubjectPublicKeyInfo), | 
|     this.key('issuerUniqueID').implicit(1).bitstr().optional(), | 
|     this.key('subjectUniqueID').implicit(2).bitstr().optional(), | 
|     this.key('extensions').explicit(3).seqof(Extension).optional() | 
|   ) | 
| }) | 
|   | 
| var X509Certificate = asn.define('X509Certificate', function () { | 
|   this.seq().obj( | 
|     this.key('tbsCertificate').use(TBSCertificate), | 
|     this.key('signatureAlgorithm').use(AlgorithmIdentifier), | 
|     this.key('signatureValue').bitstr() | 
|   ) | 
| }) | 
|   | 
| module.exports = X509Certificate |