CRYPTO(4) Kernel Interfaces Manual 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 cryp- tographic 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 re- sults. 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 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 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 im- ported to FreeBSD 5.0. FreeBSD 8.0 March 3, 2009 CRYPTO(4)
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