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"
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.
142 tristate "CAST5 (CAST-128) cipher algorithm"
145 The CAST5 encryption algorithm (synonymous with CAST-128) is
146 described in RFC2144.
149 tristate "CAST6 (CAST-256) cipher algorithm"
152 The CAST6 encryption algorithm (synonymous with CAST-256) is
153 described in RFC2612.
156 tristate "TEA and XTEA cipher algorithms"
159 TEA cipher algorithm.
161 Tiny Encryption Algorithm is a simple cipher that uses
162 many rounds for security. It is very fast and uses
165 Xtendend Tiny Encryption Algorithm is a modifcation to
166 the TEA algorithm to address a potential key weakness
167 in the TEA algorithm.
170 tristate "ARC4 cipher algorithm"
173 ARC4 cipher algorithm.
175 ARC4 is a stream cipher using keys ranging from 8 bits to 2048
176 bits in length. This algorithm is required for driver-based
177 WEP, but it should not be for other purposes because of the
178 weakness of the algorithm.
180 config CRYPTO_DEFLATE
181 tristate "Deflate compression algorithm"
186 This is the Deflate algorithm (RFC1951), specified for use in
187 IPSec with the IPCOMP protocol (RFC3173, RFC2394).
189 You will most probably want this if using IPSec.
191 config CRYPTO_MICHAEL_MIC
192 tristate "Michael MIC keyed digest algorithm"
195 Michael MIC is used for message integrity protection in TKIP
196 (IEEE 802.11i). This algorithm is required for TKIP, but it
197 should not be used for other purposes because of the weakness
201 tristate "CRC32c CRC algorithm"
205 Castagnoli, et al Cyclic Redundancy-Check Algorithm. Used
206 by iSCSI for header and data digests and by others.
207 See Castagnoli93. This implementation uses lib/libcrc32c.
208 Module will be crc32c.
211 tristate "Testing module"
214 Quick & dirty crypto test module.
216 config CRYPTO_SIGNATURE
217 bool "In-kernel signature checker (EXPERIMENTAL)"
220 Signature checker (used for module sig checking).
222 config CRYPTO_SIGNATURE_DSA
223 bool "Handle DSA signatures (EXPERIMENTAL)"
224 depends on CRYPTO_SIGNATURE
227 DSA Signature checker.
230 bool "Multiprecision maths library (EXPERIMENTAL)"
233 Multiprecision maths library from GnuPG