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 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 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_CAMELLIA_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
aesni(4), glxsb(4), hifn(4), ipsec(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.