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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_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

     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.