Some info from the last link:
OpenSSL 0.9.8 has AES support out of the box. The PadLock support is transparent. All you need to do is to use the kernel module padlock.ko instead of aes.ko. From then on use AES cipher as normally. However to use VIA C7 hash engine to speed up SHA1, SHA224 or SHA256 you need to patch OpenSSL.