2 # Cryptographic API Configuration
5 menu "Cryptographic options"
8 bool "Cryptographic API"
10 This option provides the core Cryptographic API.
16 HMAC: Keyed-Hashing for Message Authentication (RFC2104).
17 This is required for IPSec.
20 tristate "Null algorithms"
23 These are 'Null' algorithms, used by IPsec, which do nothing.
26 tristate "MD4 digest algorithm"
29 MD4 message digest algorithm (RFC1320).
32 tristate "MD5 digest algorithm"
35 MD5 message digest algorithm (RFC1321).
38 tristate "SHA1 digest algorithm"
41 SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2).
43 config CRYPTO_SHA1_Z990
44 tristate "SHA1 digest algorithm for IBM zSeries z990"
45 depends on CRYPTO && ARCH_S390
47 SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2).
50 tristate "SHA256 digest algorithm"
53 SHA256 secure hash standard (DFIPS 180-2).
55 This version of SHA implements a 256 bit hash with 128 bits of
56 security against collision attacks.
59 tristate "SHA384 and SHA512 digest algorithms"
62 SHA512 secure hash standard (DFIPS 180-2).
64 This version of SHA implements a 512 bit hash with 256 bits of
65 security against collision attacks.
67 This code also includes SHA-384, a 384 bit hash with 192 bits
68 of security against collision attacks.
71 tristate "DES and Triple DES EDE cipher algorithms"
74 DES cipher algorithm (FIPS 46-2), and Triple DES EDE (FIPS 46-3).
76 config CRYPTO_DES_Z990
77 tristate "DES and Triple DES cipher algorithms for IBM zSeries z990"
78 depends on CRYPTO && ARCH_S390
80 DES cipher algorithm (FIPS 46-2), and Triple DES EDE (FIPS 46-3).
82 config CRYPTO_BLOWFISH
83 tristate "Blowfish cipher algorithm"
86 Blowfish cipher algorithm, by Bruce Schneier.
88 This is a variable key length cipher which can use keys from 32
89 bits to 448 bits in length. It's fast, simple and specifically
90 designed for use on "large microprocessors".
93 http://www.schneier.com/blowfish.html
96 tristate "Twofish cipher algorithm"
99 Twofish cipher algorithm.
101 Twofish was submitted as an AES (Advanced Encryption Standard)
102 candidate cipher by researchers at CounterPane Systems. It is a
103 16 round block cipher supporting key sizes of 128, 192, and 256
107 http://www.schneier.com/twofish.html
109 config CRYPTO_SERPENT
110 tristate "Serpent cipher algorithm"
113 Serpent cipher algorithm, by Anderson, Biham & Knudsen.
115 Keys are allowed to be from 0 to 256 bits in length, in steps
119 http://www.cl.cam.ac.uk/~rja14/serpent.html
122 tristate "AES cipher algorithms"
123 depends on CRYPTO && !(X86 && !X86_64)
125 AES cipher algorithms (FIPS-197). AES uses the Rijndael
128 Rijndael appears to be consistently a very good performer in
129 both hardware and software across a wide range of computing
130 environments regardless of its use in feedback or non-feedback
131 modes. Its key setup time is excellent, and its key agility is
132 good. Rijndael's very low memory requirements make it very well
133 suited for restricted-space environments, in which it also
134 demonstrates excellent performance. Rijndael's operations are
135 among the easiest to defend against power and timing attacks.
137 The AES specifies three key sizes: 128, 192 and 256 bits
139 See http://csrc.nist.gov/CryptoToolkit/aes/ for more information.
141 config CRYPTO_AES_586
142 tristate "AES cipher algorithms (i586)"
143 depends on CRYPTO && (X86 && !X86_64)
145 AES cipher algorithms (FIPS-197). AES uses the Rijndael
148 Rijndael appears to be consistently a very good performer in
149 both hardware and software across a wide range of computing
150 environments regardless of its use in feedback or non-feedback
151 modes. Its key setup time is excellent, and its key agility is
152 good. Rijndael's very low memory requirements make it very well
153 suited for restricted-space environments, in which it also
154 demonstrates excellent performance. Rijndael's operations are
155 among the easiest to defend against power and timing attacks.
157 The AES specifies three key sizes: 128, 192 and 256 bits
159 See http://csrc.nist.gov/encryption/aes/ for more information.
162 tristate "CAST5 (CAST-128) cipher algorithm"
165 The CAST5 encryption algorithm (synonymous with CAST-128) is
166 described in RFC2144.
169 tristate "CAST6 (CAST-256) cipher algorithm"
172 The CAST6 encryption algorithm (synonymous with CAST-256) is
173 described in RFC2612.
176 tristate "TEA and XTEA cipher algorithms"
179 TEA cipher algorithm.
181 Tiny Encryption Algorithm is a simple cipher that uses
182 many rounds for security. It is very fast and uses
185 Xtendend Tiny Encryption Algorithm is a modifcation to
186 the TEA algorithm to address a potential key weakness
187 in the TEA algorithm.
190 tristate "ARC4 cipher algorithm"
193 ARC4 cipher algorithm.
195 ARC4 is a stream cipher using keys ranging from 8 bits to 2048
196 bits in length. This algorithm is required for driver-based
197 WEP, but it should not be for other purposes because of the
198 weakness of the algorithm.
201 tristate "Khazad cipher algorithm"
204 Khazad cipher algorithm.
206 Khazad was a finalist in the initial NESSIE competition. It is
207 an algorithm optimized for 64-bit processors with good performance
208 on 32-bit processors. Khazad uses an 128 bit key size.
211 http://planeta.terra.com.br/informatica/paulobarreto/KhazadPage.html
213 config CRYPTO_DEFLATE
214 tristate "Deflate compression algorithm"
219 This is the Deflate algorithm (RFC1951), specified for use in
220 IPSec with the IPCOMP protocol (RFC3173, RFC2394).
222 You will most probably want this if using IPSec.
224 config CRYPTO_MICHAEL_MIC
225 tristate "Michael MIC keyed digest algorithm"
228 Michael MIC is used for message integrity protection in TKIP
229 (IEEE 802.11i). This algorithm is required for TKIP, but it
230 should not be used for other purposes because of the weakness
234 tristate "CRC32c CRC algorithm"
238 Castagnoli, et al Cyclic Redundancy-Check Algorithm. Used
239 by iSCSI for header and data digests and by others.
240 See Castagnoli93. This implementation uses lib/libcrc32c.
241 Module will be crc32c.
244 tristate "Testing module"
247 Quick & dirty crypto test module.
249 config CRYPTO_SIGNATURE
250 bool "In-kernel signature checker (EXPERIMENTAL)"
253 Signature checker (used for module sig checking).
255 config CRYPTO_SIGNATURE_DSA
256 bool "Handle DSA signatures (EXPERIMENTAL)"
257 depends on CRYPTO_SIGNATURE
260 DSA Signature checker.
263 bool "Multiprecision maths library (EXPERIMENTAL)"
266 Multiprecision maths library from GnuPG