How to use the assert-plus.strictEqual function in assert-plus

der._offset += der.length;
	}

	/* extensions */
	if (der.peek() === Local(3)) {
		der.readSequence(Local(3));
		var extEnd = der.offset + der.length;
		der.readSequence();

		while (der.offset < extEnd)
			readExtension(cert, buf, der);

		assert.strictEqual(der.offset, extEnd);
	}

	assert.strictEqual(der.offset, sigOffset);

	der.readSequence();
	after = der.offset + der.length;
	var sigAlgOid = der.readOID();
	var sigAlg = SIGN_ALGS[sigAlgOid];
	if (sigAlg === undefined)
		throw (new Error('unknown signature algorithm ' + sigAlgOid));
	der._offset = after;

	var sigData = der.readString(asn1.Ber.BitString, true);
	if (sigData[0] === 0)
		sigData = sigData.slice(1);
	var algParts = sigAlg.split('-');

	sig.signature = Signature.parse(sigData, algParts[0], 'asn1');
	sig.signature.hashAlgorithm = algParts[1];

* real size.
		 */
		curve.size = p.length * 8 - utils.countZeros(p);

		// Curve sequence
		der.readSequence();
		curve.a = utils.mpNormalize(
		    der.readString(asn1.Ber.OctetString, true));
		curve.b = utils.mpNormalize(
		    der.readString(asn1.Ber.OctetString, true));
		if (der.peek() === asn1.Ber.BitString)
			curve.s = der.readString(asn1.Ber.BitString, true);

		// Combined Gx and Gy
		curve.G = der.readString(asn1.Ber.OctetString, true);
		assert.strictEqual(curve.G[0], 0x4,
		    'uncompressed G is required');

		curve.n = utils.mpNormalize(
		    der.readString(asn1.Ber.Integer, true));
		curve.h = utils.mpNormalize(
		    der.readString(asn1.Ber.Integer, true));
		assert.strictEqual(curve.h[0], 0x1, 'a cofactor=1 curve is ' +
		    'required');

		curveNames = Object.keys(algs.curves);
		var ks = Object.keys(curve);
		for (j = 0; j < curveNames.length; ++j) {
			c = curveNames[j];
			cd = algs.curves[c];
			var equal = true;
			for (var i = 0; i < ks.length; ++i) {

break;
			}
		}

	} else {
		// ECParameters sequence
		der.readSequence();
		var version = der.readString(asn1.Ber.Integer, true);
		assert.strictEqual(version[0], 1, 'ECDSA key not version 1');

		var curve = {};

		// FieldID sequence
		der.readSequence();
		var fieldTypeOid = der.readOID();
		assert.strictEqual(fieldTypeOid, '1.2.840.10045.1.1',
		    'ECDSA key is not from a prime-field');
		var p = curve.p = utils.mpNormalize(
		    der.readString(asn1.Ber.Integer, true));
		/*
		 * p always starts with a 1 bit, so count the zeros to get its
		 * real size.
		 */
		curve.size = p.length * 8 - utils.countZeros(p);

		// Curve sequence
		der.readSequence();
		curve.a = utils.mpNormalize(
		    der.readString(asn1.Ber.OctetString, true));
		curve.b = utils.mpNormalize(
		    der.readString(asn1.Ber.OctetString, true));
		if (der.peek() === asn1.Ber.BitString)

function readPkcs1RSAPrivate(der) {
	var version = readMPInt(der, 'version');
	assert.strictEqual(version[0], 0);

	// modulus then public exponent
	var n = readMPInt(der, 'modulus');
	var e = readMPInt(der, 'public exponent');
	var d = readMPInt(der, 'private exponent');
	var p = readMPInt(der, 'prime1');
	var q = readMPInt(der, 'prime2');
	var dmodp = readMPInt(der, 'exponent1');
	var dmodq = readMPInt(der, 'exponent2');
	var iqmp = readMPInt(der, 'iqmp');

	// now, make the key
	var key = {
		type: 'rsa',
		parts: [
			{ name: 'n', data: n },

function readPkcs1ECDSAPrivate(der) {
	var version = readMPInt(der, 'version');
	assert.strictEqual(version.readUInt8(0), 1);

	// private key
	var d = der.readString(asn1.Ber.OctetString, true);

	der.readSequence(0xa0);
	var curve = readECDSACurve(der);
	assert.string(curve, 'a known elliptic curve');

	der.readSequence(0xa1);
	var Q = der.readString(asn1.Ber.BitString, true);
	Q = utils.ecNormalize(Q);

	var key = {
		type: 'ecdsa',
		parts: [
			{ name: 'curve', data: new Buffer(curve) },

function readPkcs1ECDSAPublic(der) {
	der.readSequence();

	var oid = der.readOID();
	assert.strictEqual(oid, '1.2.840.10045.2.1', 'must be ecPublicKey');

	var curveOid = der.readOID();

	var curve;
	var curves = Object.keys(algs.curves);
	for (var j = 0; j < curves.length; ++j) {
		var c = curves[j];
		var cd = algs.curves[c];
		if (cd.pkcs8oid === curveOid) {
			curve = c;
			break;
		}
	}
	assert.string(curve, 'a known ECDSA named curve');

	var Q = der.readString(asn1.Ber.BitString, true);

'key must have at least one part');
	assert.ok(partial || sshbuf.atEnd(),
	    'leftover bytes at end of key');

	var Constructor = Key;
	var algInfo = algs.info[key.type];
	if (type === 'private' || algInfo.parts.length !== parts.length) {
		algInfo = algs.privInfo[key.type];
		Constructor = PrivateKey;
	}
	assert.strictEqual(algInfo.parts.length, parts.length);

	if (key.type === 'ecdsa') {
		var res = /^ecdsa-sha2-(.+)$/.exec(alg);
		assert.ok(res !== null);
		assert.strictEqual(res[1], parts[0].data.toString());
	}

	var normalized = true;
	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];
			var nd = utils.mpNormalize(p.data);
			if (nd !== p.data) {
				p.data = nd;
				normalized = false;
			}
		}
	}

header = 'PRIVATE KEY';
			pkcs8.writePkcs8(der, key);
		} else {
			if (type)
				assert.strictEqual(type, 'pkcs1');
			header = alg + ' PRIVATE KEY';
			pkcs1.writePkcs1(der, key);
		}

	} else if (Key.isKey(key)) {
		if (type && type === 'pkcs1') {
			header = alg + ' PUBLIC KEY';
			pkcs1.writePkcs1(der, key);
		} else {
			if (type)
				assert.strictEqual(type, 'pkcs8');
			header = 'PUBLIC KEY';
			pkcs8.writePkcs8(der, key);
		}

	} else {
		throw (new Error('key is not a Key or PrivateKey'));
	}

	var tmp = der.buffer.toString('base64');
	var len = tmp.length + (tmp.length / 64) +
	    18 + 16 + header.length*2 + 10;
	var buf = new Buffer(len);
	var o = 0;
	o += buf.write('-----BEGIN ' + header + '-----\n', o);
	for (var i = 0; i < tmp.length; ) {
		var limit = i + 64;

function readMPInt(der, nm) {
	assert.strictEqual(der.peek(), asn1.Ber.Integer,
	    nm + ' is not an Integer');
	return (utils.mpNormalize(der.readString(asn1.Ber.Integer, true)));
}

function readMPInt(der, nm) {
	assert.strictEqual(der.peek(), asn1.Ber.Integer,
	    nm + ' is not an Integer');
	return (utils.mpNormalize(der.readString(asn1.Ber.Integer, true)));
}