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.