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FreeBSD 11.0 - man page for padlock (freebsd section 4)

PADLOCK(4)						   BSD Kernel Interfaces Manual 						PADLOCK(4)

padlock -- driver for the cryptographic functions and RNG in VIA C3, C7 and Eden processors
To compile this driver into the kernel, place the following lines in your kernel configuration file: device crypto device padlock Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): padlock_load="YES"
The C3 and Eden processor series from VIA include hardware acceleration for AES. The C7 series includes hardware acceleration for AES, SHA1, SHA256 and RSA. All of the above processor series include a hardware random number generator. The padlock driver registers itself to accelerate AES operations and, if available, HMAC/SHA1 and HMAC/SHA256 for crypto(4). It also regis- ters itself to accelerate other HMAC algorithms, although there is no hardware acceleration for those algorithms. This is only needed so padlock can work with ipsec(4). The hardware random number generator supplies data for the kernel random(4) subsystem.
crypt(3), crypto(4), intro(4), ipsec(4), random(4), crypto(9)
The padlock driver first appeared in OpenBSD. The first FreeBSD release to include it was FreeBSD 6.0.
The padlock driver with AES encryption support was written by Jason Wright <>. It was ported to FreeBSD and then extended to support SHA1 and SHA256 by Pawel Jakub Dawidek <>. This manual page was written by Christian Brueffer <>.
February 8, 2010 BSD

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