crypto/Kconfig

#
# Cryptographic API Configuration
#

menu "Cryptographic options"

config CRYPTO
	bool "Cryptographic API"
	default y if INET_AH=y || INET_AH=m || INET_ESP=y || INET_ESP=m
	help
	  This option provides the core Cryptographic API.

config CRYPTO_HMAC
	bool "HMAC support"
	depends on CRYPTO
	default y if INET_AH=y || INET_AH=m || INET_ESP=y || INET_ESP=m
	help
	  HMAC: Keyed-Hashing for Message Authentication (RFC2104).
	  This is required for IPSec.

config CRYPTO_NULL
	tristate "Null algorithms"
	depends on CRYPTO
	help
	  These are 'Null' algorithms, used by IPsec, which do nothing.

config CRYPTO_MD4
	tristate "MD4 digest algorithm"
	depends on CRYPTO
	help
	  MD4 message digest algorithm (RFC1320).

config CRYPTO_MD5
	tristate "MD5 digest algorithm"
	depends on CRYPTO
	default y if INET_AH=y || INET_AH=m || INET_ESP=y || INET_ESP=m
	help
	  MD5 message digest algorithm (RFC1321).

config CRYPTO_SHA1
	tristate "SHA1 digest algorithm"
	depends on CRYPTO
	default y if INET_AH=y || INET_AH=m || INET_ESP=y || INET_ESP=m
	help
	  SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2).

config CRYPTO_SHA256
	tristate "SHA256 digest algorithm"
	depends on CRYPTO
	help
	  SHA256 secure hash standard (DFIPS 180-2).
	  
	  This version of SHA implements a 256 bit hash with 128 bits of
	  security against collision attacks.

config CRYPTO_DES
	tristate "DES and Triple DES EDE cipher algorithms"
	depends on CRYPTO
	default y if INET_AH=y || INET_AH=m || INET_ESP=y || INET_ESP=m
	help
	  DES cipher algorithm (FIPS 46-2), and Triple DES EDE (FIPS 46-3).

config CRYPTO_BLOWFISH
	tristate "Blowfish cipher algorithm"
	depends on CRYPTO
	help
	  Blowfish cipher algorithm, by Bruce Schneier.
	  
	  This is a variable key length cipher which can use keys from 32
	  bits to 448 bits in length.  It's fast, simple and specifically
	  designed for use on "large microprocessors".
	  
	  See also:
	  http://www.counterpane.com/blowfish.html

config CRYPTO_TWOFISH
	tristate "Twofish cipher algorithm"
	depends on CRYPTO
	help
	  Twofish cipher algorithm.
	  
	  Twofish was submitted as an AES (Advanced Encryption Standard)
	  candidate cipher by researchers at CounterPane Systems.  It is a
	  16 round block cipher supporting key sizes of 128, 192, and 256
	  bits.
	  
	  See also:
	  http://www.counterpane.com/twofish.html

config CRYPTO_SERPENT
	tristate "Serpent cipher algorithm"
	depends on CRYPTO
	help
	  Serpent cipher algorithm, by Anderson, Biham & Knudsen.

	  Keys are allowed to be from 0 to 256 bits in length, in steps
	  of 8 bits.

	  See also:
	  http://www.cl.cam.ac.uk/~rja14/serpent.html

config CRYPTO_AES
	tristate "AES cipher algorithms"
	depends on CRYPTO
	help
	  AES cipher algorithms (FIPS-197). AES uses the Rijndael 
	  algorithm.

	  Rijndael appears to be consistently a very good performer in
	  both hardware and software across a wide range of computing 
	  environments regardless of its use in feedback or non-feedback 
	  modes. Its key setup time is excellent, and its key agility is 
	  good. Rijndael's very low memory requirements make it very well 
	  suited for restricted-space environments, in which it also 
	  demonstrates excellent performance. Rijndael's operations are 
	  among the easiest to defend against power and timing attacks.	

	  The AES specifies three key sizes: 128, 192 and 256 bits	  

	  See http://csrc.nist.gov/encryption/aes/ for more information.

config CRYPTO_TEST
	tristate "Testing module"
	depends on CRYPTO
	help
	  Quick & dirty crypto test module.

endmenu