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linux/crypto/Kconfig
Joy Latten 23e353c8a6 [CRYPTO] ctr: Add CTR (Counter) block cipher mode 
This patch implements CTR mode for IPsec.
It is based off of RFC 3686.

Please note:
1. CTR turns a block cipher into a stream cipher.
Encryption is done in blocks, however the last block
may be a partial block.

A "counter block" is encrypted, creating a keystream
that is xor'ed with the plaintext. The counter portion
of the counter block is incremented after each block
of plaintext is encrypted.
Decryption is performed in same manner.

2. The CTR counterblock is composed of,
        nonce + IV + counter

The size of the counterblock is equivalent to the
blocksize of the cipher.
        sizeof(nonce) + sizeof(IV) + sizeof(counter) = blocksize

The CTR template requires the name of the cipher
algorithm, the sizeof the nonce, and the sizeof the iv.
        ctr(cipher,sizeof_nonce,sizeof_iv)

So for example,
        ctr(aes,4,8)
specifies the counterblock will be composed of 4 bytes
from a nonce, 8 bytes from the iv, and 4 bytes for counter
since aes has a blocksize of 16 bytes.

3. The counter portion of the counter block is stored
in big endian for conformance to rfc 3686.

Signed-off-by: Joy Latten <latten@austin.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:01 +11:00

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#
# Generic algorithms support
#
config XOR_BLOCKS
tristate
#
# async_tx api: hardware offloaded memory transfer/transform support
#
source "crypto/async_tx/Kconfig"
#
# Cryptographic API Configuration
#
menuconfig CRYPTO
bool "Cryptographic API"
help
This option provides the core Cryptographic API.
if CRYPTO
config CRYPTO_ALGAPI
tristate
help
This option provides the API for cryptographic algorithms.
config CRYPTO_ABLKCIPHER
tristate
select CRYPTO_BLKCIPHER
config CRYPTO_AEAD
tristate
select CRYPTO_ALGAPI
config CRYPTO_BLKCIPHER
tristate
select CRYPTO_ALGAPI
config CRYPTO_HASH
tristate
select CRYPTO_ALGAPI
config CRYPTO_MANAGER
tristate "Cryptographic algorithm manager"
select CRYPTO_ALGAPI
help
Create default cryptographic template instantiations such as
cbc(aes).
config CRYPTO_HMAC
tristate "HMAC support"
select CRYPTO_HASH
select CRYPTO_MANAGER
help
HMAC: Keyed-Hashing for Message Authentication (RFC2104).
This is required for IPSec.
config CRYPTO_XCBC
tristate "XCBC support"
depends on EXPERIMENTAL
select CRYPTO_HASH
select CRYPTO_MANAGER
help
XCBC: Keyed-Hashing with encryption algorithm
http://www.ietf.org/rfc/rfc3566.txt
http://csrc.nist.gov/encryption/modes/proposedmodes/
xcbc-mac/xcbc-mac-spec.pdf
config CRYPTO_NULL
tristate "Null algorithms"
select CRYPTO_ALGAPI
help
These are 'Null' algorithms, used by IPsec, which do nothing.
config CRYPTO_MD4
tristate "MD4 digest algorithm"
select CRYPTO_ALGAPI
help
MD4 message digest algorithm (RFC1320).
config CRYPTO_MD5
tristate "MD5 digest algorithm"
select CRYPTO_ALGAPI
help
MD5 message digest algorithm (RFC1321).
config CRYPTO_SHA1
tristate "SHA1 digest algorithm"
select CRYPTO_ALGAPI
help
SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2).
config CRYPTO_SHA256
tristate "SHA256 digest algorithm"
select CRYPTO_ALGAPI
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_SHA512
tristate "SHA384 and SHA512 digest algorithms"
select CRYPTO_ALGAPI
help
SHA512 secure hash standard (DFIPS 180-2).
This version of SHA implements a 512 bit hash with 256 bits of
security against collision attacks.
This code also includes SHA-384, a 384 bit hash with 192 bits
of security against collision attacks.
config CRYPTO_WP512
tristate "Whirlpool digest algorithms"
select CRYPTO_ALGAPI
help
Whirlpool hash algorithm 512, 384 and 256-bit hashes
Whirlpool-512 is part of the NESSIE cryptographic primitives.
Whirlpool will be part of the ISO/IEC 10118-3:2003(E) standard
See also:
<http://planeta.terra.com.br/informatica/paulobarreto/WhirlpoolPage.html>
config CRYPTO_TGR192
tristate "Tiger digest algorithms"
select CRYPTO_ALGAPI
help
Tiger hash algorithm 192, 160 and 128-bit hashes
Tiger is a hash function optimized for 64-bit processors while
still having decent performance on 32-bit processors.
Tiger was developed by Ross Anderson and Eli Biham.
See also:
<http://www.cs.technion.ac.il/~biham/Reports/Tiger/>.
config CRYPTO_GF128MUL
tristate "GF(2^128) multiplication functions (EXPERIMENTAL)"
depends on EXPERIMENTAL
help
Efficient table driven implementation of multiplications in the
field GF(2^128). This is needed by some cypher modes. This
option will be selected automatically if you select such a
cipher mode. Only select this option by hand if you expect to load
an external module that requires these functions.
config CRYPTO_ECB
tristate "ECB support"
select CRYPTO_BLKCIPHER
select CRYPTO_MANAGER
help
ECB: Electronic CodeBook mode
This is the simplest block cipher algorithm. It simply encrypts
the input block by block.
config CRYPTO_CBC
tristate "CBC support"
select CRYPTO_BLKCIPHER
select CRYPTO_MANAGER
help
CBC: Cipher Block Chaining mode
This block cipher algorithm is required for IPSec.
config CRYPTO_PCBC
tristate "PCBC support"
select CRYPTO_BLKCIPHER
select CRYPTO_MANAGER
help
PCBC: Propagating Cipher Block Chaining mode
This block cipher algorithm is required for RxRPC.
config CRYPTO_LRW
tristate "LRW support (EXPERIMENTAL)"
depends on EXPERIMENTAL
select CRYPTO_BLKCIPHER
select CRYPTO_MANAGER
select CRYPTO_GF128MUL
help
LRW: Liskov Rivest Wagner, a tweakable, non malleable, non movable
narrow block cipher mode for dm-crypt. Use it with cipher
specification string aes-lrw-benbi, the key must be 256, 320 or 384.
The first 128, 192 or 256 bits in the key are used for AES and the
rest is used to tie each cipher block to its logical position.
config CRYPTO_XTS
tristate "XTS support (EXPERIMENTAL)"
depends on EXPERIMENTAL
select CRYPTO_BLKCIPHER
select CRYPTO_MANAGER
select CRYPTO_GF128MUL
help
XTS: IEEE1619/D16 narrow block cipher use with aes-xts-plain,
key size 256, 384 or 512 bits. This implementation currently
can't handle a sectorsize which is not a multiple of 16 bytes.
config CRYPTO_CTR
tristate "CTR support"
select CRYPTO_BLKCIPHER
select CRYPTO_MANAGER
default m
help
CTR: Counter mode
This block cipher algorithm is required for IPSec.
config CRYPTO_CRYPTD
tristate "Software async crypto daemon"
select CRYPTO_ABLKCIPHER
select CRYPTO_MANAGER
help
This is a generic software asynchronous crypto daemon that
converts an arbitrary synchronous software crypto algorithm
into an asynchronous algorithm that executes in a kernel thread.
config CRYPTO_DES
tristate "DES and Triple DES EDE cipher algorithms"
select CRYPTO_ALGAPI
help
DES cipher algorithm (FIPS 46-2), and Triple DES EDE (FIPS 46-3).
config CRYPTO_FCRYPT
tristate "FCrypt cipher algorithm"
select CRYPTO_ALGAPI
select CRYPTO_BLKCIPHER
help
FCrypt algorithm used by RxRPC.
config CRYPTO_BLOWFISH
tristate "Blowfish cipher algorithm"
select CRYPTO_ALGAPI
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.schneier.com/blowfish.html>
config CRYPTO_TWOFISH
tristate "Twofish cipher algorithm"
select CRYPTO_ALGAPI
select CRYPTO_TWOFISH_COMMON
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.schneier.com/twofish.html>
config CRYPTO_TWOFISH_COMMON
tristate
help
Common parts of the Twofish cipher algorithm shared by the
generic c and the assembler implementations.
config CRYPTO_TWOFISH_586
tristate "Twofish cipher algorithms (i586)"
depends on (X86 || UML_X86) && !64BIT
select CRYPTO_ALGAPI
select CRYPTO_TWOFISH_COMMON
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.schneier.com/twofish.html>
config CRYPTO_TWOFISH_X86_64
tristate "Twofish cipher algorithm (x86_64)"
depends on (X86 || UML_X86) && 64BIT
select CRYPTO_ALGAPI
select CRYPTO_TWOFISH_COMMON
help
Twofish cipher algorithm (x86_64).
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.schneier.com/twofish.html>
config CRYPTO_SERPENT
tristate "Serpent cipher algorithm"
select CRYPTO_ALGAPI
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. Also includes the 'Tnepres' algorithm, a reversed
variant of Serpent for compatibility with old kerneli.org code.
See also:
<http://www.cl.cam.ac.uk/~rja14/serpent.html>
config CRYPTO_AES
tristate "AES cipher algorithms"
select CRYPTO_ALGAPI
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/CryptoToolkit/aes/> for more information.
config CRYPTO_AES_586
tristate "AES cipher algorithms (i586)"
depends on (X86 || UML_X86) && !64BIT
select CRYPTO_ALGAPI
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_AES_X86_64
tristate "AES cipher algorithms (x86_64)"
depends on (X86 || UML_X86) && 64BIT
select CRYPTO_ALGAPI
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_CAST5
tristate "CAST5 (CAST-128) cipher algorithm"
select CRYPTO_ALGAPI
help
The CAST5 encryption algorithm (synonymous with CAST-128) is
described in RFC2144.
config CRYPTO_CAST6
tristate "CAST6 (CAST-256) cipher algorithm"
select CRYPTO_ALGAPI
help
The CAST6 encryption algorithm (synonymous with CAST-256) is
described in RFC2612.
config CRYPTO_TEA
tristate "TEA, XTEA and XETA cipher algorithms"
select CRYPTO_ALGAPI
help
TEA cipher algorithm.
Tiny Encryption Algorithm is a simple cipher that uses
many rounds for security. It is very fast and uses
little memory.
Xtendend Tiny Encryption Algorithm is a modification to
the TEA algorithm to address a potential key weakness
in the TEA algorithm.
Xtendend Encryption Tiny Algorithm is a mis-implementation
of the XTEA algorithm for compatibility purposes.
config CRYPTO_ARC4
tristate "ARC4 cipher algorithm"
select CRYPTO_ALGAPI
help
ARC4 cipher algorithm.
ARC4 is a stream cipher using keys ranging from 8 bits to 2048
bits in length. This algorithm is required for driver-based
WEP, but it should not be for other purposes because of the
weakness of the algorithm.
config CRYPTO_KHAZAD
tristate "Khazad cipher algorithm"
select CRYPTO_ALGAPI
help
Khazad cipher algorithm.
Khazad was a finalist in the initial NESSIE competition. It is
an algorithm optimized for 64-bit processors with good performance
on 32-bit processors. Khazad uses an 128 bit key size.
See also:
<http://planeta.terra.com.br/informatica/paulobarreto/KhazadPage.html>
config CRYPTO_ANUBIS
tristate "Anubis cipher algorithm"
select CRYPTO_ALGAPI
help
Anubis cipher algorithm.
Anubis is a variable key length cipher which can use keys from
128 bits to 320 bits in length. It was evaluated as a entrant
in the NESSIE competition.
See also:
<https://www.cosic.esat.kuleuven.ac.be/nessie/reports/>
<http://planeta.terra.com.br/informatica/paulobarreto/AnubisPage.html>
config CRYPTO_SEED
tristate "SEED cipher algorithm"
select CRYPTO_ALGAPI
help
SEED cipher algorithm (RFC4269).
SEED is a 128-bit symmetric key block cipher that has been
developed by KISA (Korea Information Security Agency) as a
national standard encryption algorithm of the Republic of Korea.
It is a 16 round block cipher with the key size of 128 bit.
See also:
<http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp>
config CRYPTO_DEFLATE
tristate "Deflate compression algorithm"
select CRYPTO_ALGAPI
select ZLIB_INFLATE
select ZLIB_DEFLATE
help
This is the Deflate algorithm (RFC1951), specified for use in
IPSec with the IPCOMP protocol (RFC3173, RFC2394).
You will most probably want this if using IPSec.
config CRYPTO_MICHAEL_MIC
tristate "Michael MIC keyed digest algorithm"
select CRYPTO_ALGAPI
help
Michael MIC is used for message integrity protection in TKIP
(IEEE 802.11i). This algorithm is required for TKIP, but it
should not be used for other purposes because of the weakness
of the algorithm.
config CRYPTO_CRC32C
tristate "CRC32c CRC algorithm"
select CRYPTO_ALGAPI
select LIBCRC32C
help
Castagnoli, et al Cyclic Redundancy-Check Algorithm. Used
by iSCSI for header and data digests and by others.
See Castagnoli93. This implementation uses lib/libcrc32c.
Module will be crc32c.
config CRYPTO_CAMELLIA
tristate "Camellia cipher algorithms"
depends on CRYPTO
select CRYPTO_ALGAPI
help
Camellia cipher algorithms module.
Camellia is a symmetric key block cipher developed jointly
at NTT and Mitsubishi Electric Corporation.
The Camellia specifies three key sizes: 128, 192 and 256 bits.
See also:
<https://info.isl.ntt.co.jp/crypt/eng/camellia/index_s.html>
config CRYPTO_TEST
tristate "Testing module"
depends on m
select CRYPTO_ALGAPI
help
Quick & dirty crypto test module.
config CRYPTO_AUTHENC
tristate "Authenc support"
select CRYPTO_AEAD
select CRYPTO_MANAGER
help
Authenc: Combined mode wrapper for IPsec.
This is required for IPSec.
source "drivers/crypto/Kconfig"
endif # if CRYPTO
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