Function PRF

modules/crypt/ssl/ssl_prf.js:63–79

(session, secret, label, seed, n, hash)

}

function PRF(session, secret, label, seed, n, hash)
{
	let result;
	label = ArrayBuffer.fromString(label).concat(seed);
	if (session.protocolVersion <= 0x302)
		result = Bin.xor(
			p_hash(new Crypt.Digest("MD5"), secret.slice(0, iceil(secret.byteLength, 2)), label, n),
			p_hash(new Crypt.Digest("SHA1"), secret.slice(Math.idiv(secret.byteLength, 2)), label, n)
		);
	else {
		if (!hash)
			hash = session.chosenCipher.hashAlgorithm == SHA384 ? "SHA384" : "SHA256";
		result = p_hash(new Crypt.Digest(hash), secret, label, n);
	}
	result.buffer.resize(n);		// p_hash > getChunk returns resizable buffer
	return result;
}

export default PRF;