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, permit-
     ting 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 ses-
		   sion.

FEATURES

     Depending on hardware being present, the following symmetric and asymmet-
     ric 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

     hifn(4), safe(4), ubsec(4), crypto(9)

HISTORY

     The crypto driver first appeared in OpenBSD 3.0.  The crypto driver was
     imported to FreeBSD 5.0.