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.\" $FreeBSD$
.\"
.Dd August 1, 2007
.Dt CRYPTO 4
.Os
.Sh NAME
.Nm crypto ,
.Nm cryptodev
.Nd hardware crypto access driver
.Sh SYNOPSIS
.Cd device crypto
.Cd device cryptodev
.Sh DESCRIPTION
The
.Nm
driver provides a device-independent framework to support
cryptographic operations in the kernel.
The
.Nm cryptodev
driver provides userland applications access to this support
through the
.Pa /dev/crypto
device.
This node primarily operates in an
.Xr ioctl 2
based model, permitting a variety of applications to query device capabilities,
submit transactions, and get results.
.Pp
If
.Ar count
given in the specification, and is greater than 0, a maximum of one
.Nm
device is created.
.Pp
The following
.Xr ioctl 2
calls apply only to the
.Nm
devices:
.Bl -tag -width ".Dv CIOCGSESSION"
.It Dv CIOCGSESSION
Setup a new crypto session for a new type of operation.
.It Dv CIOCFSESSION
Free a previously established session.
.It Dv CIOCCRYPT
Perform a crypto operation against a previously setup session.
.El
.Sh FEATURES
Depending on hardware being present, the following symmetric and
asymmetric cryptographic features are potentially available from
.Pa /dev/crypto :
.Pp
.Bl -tag -width ".Dv CRYPTO_RIPEMD160_HMAC" -offset indent -compact
.It Dv CRYPTO_DES_CBC
.It Dv CRYPTO_3DES_CBC
.It Dv CRYPTO_BLF_CBC
.It Dv CRYPTO_CAMELLIA_CBC
.It Dv CRYPTO_CAST_CBC
.It Dv CRYPTO_SKIPJACK_CBC
.It Dv CRYPTO_MD5_HMAC
.It Dv CRYPTO_SHA1_HMAC
.It Dv CRYPTO_RIPEMD160_HMAC
.It Dv CRYPTO_MD5_KPDK
.It Dv CRYPTO_SHA1_KPDK
.It Dv CRYPTO_AES_CBC
.It Dv CRYPTO_ARC4
.It Dv CRYPTO_MD5
.It Dv CRYPTO_SHA1
.It Dv CRK_MOD_EXP
.It Dv CRK_MOD_EXP_CRT
.It Dv CRK_DSA_SIGN
.It Dv CRK_DSA_VERIFY
.It Dv CRK_DH_COMPUTE_KEY
.El
.Sh FILES
.Bl -tag -width ".Pa /dev/crypto" -compact
.It Pa /dev/crypto
crypto access device
.El
.Sh SEE ALSO
.Xr hifn 4 ,
.Xr ipsec 4 ,
.Xr padlock 4 ,
.Xr safe 4 ,
.Xr ubsec 4 ,
.Xr geli 8 ,
.Xr crypto 9
.Sh HISTORY
The
.Nm
driver first appeared in
.Ox 3.0 .
The
.Nm
driver was imported to
.Fx 5.0 .