ASN1.js bug

implicit_parent_bug.js

var asn1 = require('asn1.js');

var broken = function() {
    var B = asn1.define('B', function() {
        this.seq().obj( // NO implicit tag here
            this.key('b').octstr()
        );
    });

    var A = asn1.define('Bug', function() {
        this.seq().obj(
            this.implicit(0).use(B)
        )
    });

    return A.decode(coded, 'der');
}

var works = function(coded) {
    var B = asn1.define('B', function() {
        this.seq().implicit(0).obj( // IMPLICIT tag copied from parent
            this.key('b').octstr()
        );
    });

    var A = asn1.define('Bug', function() {
        this.seq().obj(
            this.implicit(0).use(B)
        )
    });
    return A.decode(coded, 'der');
}

var coded = new Buffer('300720050403313233', 'hex');
works(coded);
console.log("ok");
broken(coded);
console.log("ok?");