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crypto, cryptodev - hardware crypto access driver
The crypto driver provides a device-independent framework to support
cryptographic operations in the kernel. The cryptodev driver provides
userland applications access to this support through the /dev/crypto
device. This node primarily operates in an ioctl(2) based model,
permitting a variety of applications to query device capabilities, submit
transactions, and get results.
If count given in the specification, and is greater than 0, a maximum of
one crypto device is created.
The following ioctl(2) calls apply only to the crypto devices:
CIOCGSESSION Setup a new crypto session for a new type of operation.
CIOCFSESSION Free a previously established session.
CIOCCRYPT Perform a crypto operation against a previously setup
Depending on hardware being present, the following symmetric and
asymmetric cryptographic features are potentially available from
/dev/crypto crypto access device
glxsb(4), hifn(4), ipsec(4), padlock(4), safe(4), ubsec(4), geli(8),
The crypto driver first appeared in OpenBSD 3.0. The crypto driver was
imported to FreeBSD 5.0.