diff options
Diffstat (limited to 'src/hash/sha2/sha2_32.cpp')
| -rw-r--r-- | src/hash/sha2/sha2_32.cpp | 60 |
1 files changed, 31 insertions, 29 deletions
diff --git a/src/hash/sha2/sha2_32.cpp b/src/hash/sha2/sha2_32.cpp index 52528e6fd..7c3114daf 100644 --- a/src/hash/sha2/sha2_32.cpp +++ b/src/hash/sha2/sha2_32.cpp @@ -1,8 +1,10 @@ -/************************************************* -* SHA-{224,256} Source File * -* (C) 1999-2008 Jack Lloyd * -* 2007 FlexSecure GmbH * -*************************************************/ +/* +* SHA-{224,256} +* (C) 1999-2008 Jack Lloyd +* 2007 FlexSecure GmbH +* +* Distributed under the terms of the Botan license +*/ #include <botan/sha2_32.h> #include <botan/loadstor.h> @@ -12,26 +14,26 @@ namespace Botan { namespace { -/************************************************* -* SHA-256 Rho Function * -*************************************************/ +/* +* SHA-256 Rho Function +*/ inline u32bit rho(u32bit X, u32bit rot1, u32bit rot2, u32bit rot3) { return (rotate_right(X, rot1) ^ rotate_right(X, rot2) ^ rotate_right(X, rot3)); } -/************************************************* -* SHA-256 Sigma Function * -*************************************************/ +/* +* SHA-256 Sigma Function +*/ inline u32bit sigma(u32bit X, u32bit rot1, u32bit rot2, u32bit shift) { return (rotate_right(X, rot1) ^ rotate_right(X, rot2) ^ (X >> shift)); } -/************************************************* -* SHA-256 F1 Function * -*************************************************/ +/* +* SHA-256 F1 Function +*/ inline void F1(u32bit A, u32bit B, u32bit C, u32bit& D, u32bit E, u32bit F, u32bit G, u32bit& H, u32bit msg, u32bit magic) @@ -43,9 +45,9 @@ inline void F1(u32bit A, u32bit B, u32bit C, u32bit& D, } -/************************************************* -* SHA-256 Compression Function * -*************************************************/ +/* +* SHA-256 Compression Function +*/ void SHA_224_256_BASE::compress_n(const byte input[], u32bit blocks) { u32bit A = digest[0], B = digest[1], C = digest[2], @@ -138,27 +140,27 @@ void SHA_224_256_BASE::compress_n(const byte input[], u32bit blocks) } } -/************************************************* -* Copy out the digest * -*************************************************/ +/* +* Copy out the digest +*/ void SHA_224_256_BASE::copy_out(byte output[]) { for(u32bit j = 0; j != OUTPUT_LENGTH; j += 4) store_be(digest[j/4], output + j); } -/************************************************* -* Clear memory of sensitive data * -*************************************************/ +/* +* Clear memory of sensitive data +*/ void SHA_224_256_BASE::clear() throw() { MDx_HashFunction::clear(); W.clear(); } -/************************************************* -* Clear memory of sensitive data * -*************************************************/ +/* +* Clear memory of sensitive data +*/ void SHA_224::clear() throw() { SHA_224_256_BASE::clear(); @@ -172,9 +174,9 @@ void SHA_224::clear() throw() digest[7] = 0xbefa4fa4; } -/************************************************* -* Clear memory of sensitive data * -*************************************************/ +/* +* Clear memory of sensitive data +*/ void SHA_256::clear() throw() { SHA_224_256_BASE::clear(); |