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[CRYPTO] sha256-generic: Extend sha256_generic.c to support SHA-224

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Resubmitting this patch which extends sha256_generic.c to support SHA-224 as
described in FIPS 180-2 and RFC 3874. HMAC-SHA-224 as described in RFC4231
is then supported through the hmac interface.

Patch includes test vectors for SHA-224 and HMAC-SHA-224.

SHA-224 chould be chosen as a hash algorithm when 112 bits of security
strength is required.

Patch generated against the 2.6.24-rc1 kernel and tested against
2.6.24-rc1-git14 which includes fix for scatter gather implementation for HMAC.

Signed-off-by: Jonathan Lynch <jonathan.lynch@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Jonathan Lynch 2007-11-10 20:08:25 +08:00 • committed by Herbert Xu
commit cd12fb906d
5 changed files with 241 additions and 12 deletions
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12
include/crypto/sha.h
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@ -8,6 +8,9 @@
#define SHA1_DIGEST_SIZE 20
#define SHA1_BLOCK_SIZE 64
#define SHA224_DIGEST_SIZE 28
#define SHA224_BLOCK_SIZE 64
#define SHA256_DIGEST_SIZE 32
#define SHA256_BLOCK_SIZE 64
@ -23,6 +26,15 @@
#define SHA1_H3 0x10325476UL
#define SHA1_H4 0xc3d2e1f0UL
#define SHA224_H0 0xc1059ed8UL
#define SHA224_H1 0x367cd507UL
#define SHA224_H2 0x3070dd17UL
#define SHA224_H3 0xf70e5939UL
#define SHA224_H4 0xffc00b31UL
#define SHA224_H5 0x68581511UL
#define SHA224_H6 0x64f98fa7UL
#define SHA224_H7 0xbefa4fa4UL
#define SHA256_H0 0x6a09e667UL
#define SHA256_H1 0xbb67ae85UL
#define SHA256_H2 0x3c6ef372UL