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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_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.