* Use: Initializes a DESX key buffer. The key buffer contains, in
* order, a single-DES key (either 7 or 8 bytes), an optional
* 8-byte pre-whitening key, and an optional 8-byte
* Use: Initializes a DESX key buffer. The key buffer contains, in
* order, a single-DES key (either 7 or 8 bytes), an optional
* 8-byte pre-whitening key, and an optional 8-byte