diff options
Diffstat (limited to 'src/block/cast/cast256.cpp')
| -rw-r--r-- | src/block/cast/cast256.cpp | 46 |
1 files changed, 24 insertions, 22 deletions
diff --git a/src/block/cast/cast256.cpp b/src/block/cast/cast256.cpp index b8004851b..993bab46c 100644 --- a/src/block/cast/cast256.cpp +++ b/src/block/cast/cast256.cpp @@ -1,7 +1,9 @@ -/************************************************* -* CAST-256 Source File * -* (C) 1999-2007 Jack Lloyd * -*************************************************/ +/* +* CAST-256 +* (C) 1999-2007 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ #include <botan/cast256.h> #include <botan/loadstor.h> @@ -11,9 +13,9 @@ namespace Botan { namespace { -/************************************************* -* CAST-256 Round Type 1 * -*************************************************/ +/* +* CAST-256 Round Type 1 +*/ void round1(u32bit& out, u32bit in, u32bit mask, u32bit rot) { u32bit temp = rotate_left(mask + in, rot); @@ -21,9 +23,9 @@ void round1(u32bit& out, u32bit in, u32bit mask, u32bit rot) CAST_SBOX3[get_byte(2, temp)] + CAST_SBOX4[get_byte(3, temp)]; } -/************************************************* -* CAST-256 Round Type 2 * -*************************************************/ +/* +* CAST-256 Round Type 2 +*/ void round2(u32bit& out, u32bit in, u32bit mask, u32bit rot) { u32bit temp = rotate_left(mask ^ in, rot); @@ -31,9 +33,9 @@ void round2(u32bit& out, u32bit in, u32bit mask, u32bit rot) CAST_SBOX3[get_byte(2, temp)]) ^ CAST_SBOX4[get_byte(3, temp)]; } -/************************************************* -* CAST-256 Round Type 3 * -*************************************************/ +/* +* CAST-256 Round Type 3 +*/ void round3(u32bit& out, u32bit in, u32bit mask, u32bit rot) { u32bit temp = rotate_left(mask - in, rot); @@ -43,9 +45,9 @@ void round3(u32bit& out, u32bit in, u32bit mask, u32bit rot) } -/************************************************* -* CAST-256 Encryption * -*************************************************/ +/* +* CAST-256 Encryption +*/ void CAST_256::enc(const byte in[], byte out[]) const { u32bit A = load_be<u32bit>(in, 0); @@ -81,9 +83,9 @@ void CAST_256::enc(const byte in[], byte out[]) const store_be(out, A, B, C, D); } -/************************************************* -* CAST-256 Decryption * -*************************************************/ +/* +* CAST-256 Decryption +*/ void CAST_256::dec(const byte in[], byte out[]) const { u32bit A = load_be<u32bit>(in, 0); @@ -119,9 +121,9 @@ void CAST_256::dec(const byte in[], byte out[]) const store_be(out, A, B, C, D); } -/************************************************* -* CAST-256 Key Schedule * -*************************************************/ +/* +* CAST-256 Key Schedule +*/ void CAST_256::key_schedule(const byte key[], u32bit length) { SecureBuffer<u32bit, 8> TMP; |