The Wireshark WPA Pre-shared Key Generator provides an easy way to convert a WPA passphrase and SSID to the 256-bit pre-shared ("raw") key used for key derivation.
Directions:
Type or paste in your WPA passphrase and SSID below. Wait a while. The PSK will be calculated by your browser. Javascript isn't
known for its blistering crypto speed. None of this
information will be sent over the network. Run a trace with Wireshark
if you don't believe us.