crypto(4)

NAME

crypto, cryptodev - hardware crypto access driver

SYNOPSIS

device crypto
device cryptodev

DESCRIPTION

The crypto driver provides a device-independent framework to

support
cryptographic operations in the kernel. The cryptodev driv

er 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 de

vices:

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 pre

viously setup

session.

FEATURES

Depending on hardware being present, the following symmetric

and asymmetric cryptographic features are potentially available from

/dev/crypto:

CRYPTO_DES_CBC
CRYPTO_3DES_CBC
CRYPTO_BLF_CBC
CRYPTO_CAST_CBC
CRYPTO_SKIPJACK_CBC
CRYPTO_MD5_HMAC
CRYPTO_SHA1_HMAC
CRYPTO_RIPEMD160_HMAC
CRYPTO_MD5_KPDK
CRYPTO_SHA1_KPDK
CRYPTO_AES_CBC
CRYPTO_ARC4
CRYPTO_MD5
CRYPTO_SHA1
CRK_MOD_EXP
CRK_MOD_EXP_CRT
CRK_DSA_SIGN
CRK_DSA_VERIFY
CRK_DH_COMPUTE_KEY

FILES

/dev/crypto crypto access device

SEE ALSO

fast_ipsec(4), hifn(4), padlock(4), safe(4), ubsec(4),

geli(8), crypto(9)

HISTORY

The crypto driver first appeared in OpenBSD 3.0. The crypto

driver was
imported to FreeBSD 5.0.

BSD January 16, 2004

BSD