diff options
Diffstat (limited to 'src/block/skipjack/skipjack.cpp')
| -rw-r--r-- | src/block/skipjack/skipjack.cpp | 58 |
1 files changed, 30 insertions, 28 deletions
diff --git a/src/block/skipjack/skipjack.cpp b/src/block/skipjack/skipjack.cpp index 62918a3fd..f5ffc861e 100644 --- a/src/block/skipjack/skipjack.cpp +++ b/src/block/skipjack/skipjack.cpp @@ -1,16 +1,18 @@ -/************************************************* -* Skipjack Source File * -* (C) 1999-2007 Jack Lloyd * -*************************************************/ +/* +* Skipjack +* (C) 1999-2007 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ #include <botan/skipjack.h> #include <botan/loadstor.h> namespace Botan { -/************************************************* -* Skipjack Encryption * -*************************************************/ +/* +* Skipjack Encryption +*/ void Skipjack::enc(const byte in[], byte out[]) const { u16bit W1 = load_le<u16bit>(in, 3); @@ -33,9 +35,9 @@ void Skipjack::enc(const byte in[], byte out[]) const store_le(out, W4, W3, W2, W1); } -/************************************************* -* Skipjack Decryption * -*************************************************/ +/* +* Skipjack Decryption +*/ void Skipjack::dec(const byte in[], byte out[]) const { u16bit W1 = load_le<u16bit>(in, 3); @@ -58,9 +60,9 @@ void Skipjack::dec(const byte in[], byte out[]) const store_le(out, W4, W3, W2, W1); } -/************************************************* -* Skipjack Stepping Rule 'A' * -*************************************************/ +/* +* Skipjack Stepping Rule 'A' +*/ void Skipjack::step_A(u16bit& W1, u16bit& W4, u32bit round) const { byte G1 = get_byte(0, W1), G2 = get_byte(1, W1), G3; @@ -72,9 +74,9 @@ void Skipjack::step_A(u16bit& W1, u16bit& W4, u32bit round) const W4 ^= W1 ^ round; } -/************************************************* -* Skipjack Stepping Rule 'B' * -*************************************************/ +/* +* Skipjack Stepping Rule 'B' +*/ void Skipjack::step_B(u16bit& W1, u16bit& W2, u32bit round) const { W2 ^= W1 ^ round; @@ -86,9 +88,9 @@ void Skipjack::step_B(u16bit& W1, u16bit& W2, u32bit round) const W1 = make_u16bit(G2, G3); } -/************************************************* -* Skipjack Invserse Stepping Rule 'A' * -*************************************************/ +/* +* Skipjack Invserse Stepping Rule 'A' +*/ void Skipjack::step_Ai(u16bit& W1, u16bit& W2, u32bit round) const { W1 ^= W2 ^ round; @@ -100,9 +102,9 @@ void Skipjack::step_Ai(u16bit& W1, u16bit& W2, u32bit round) const W2 = make_u16bit(G3, G2); } -/************************************************* -* Skipjack Invserse Stepping Rule 'B' * -*************************************************/ +/* +* Skipjack Invserse Stepping Rule 'B' +*/ void Skipjack::step_Bi(u16bit& W2, u16bit& W3, u32bit round) const { byte G1 = get_byte(1, W2), G2 = get_byte(0, W2), G3; @@ -114,9 +116,9 @@ void Skipjack::step_Bi(u16bit& W2, u16bit& W3, u32bit round) const W3 ^= W2 ^ round; } -/************************************************* -* Skipjack Key Schedule * -*************************************************/ +/* +* Skipjack Key Schedule +*/ void Skipjack::key_schedule(const byte key[], u32bit) { static const byte F[256] = { @@ -148,9 +150,9 @@ void Skipjack::key_schedule(const byte key[], u32bit) FTABLE[j][k] = F[k ^ key[9-j]]; } -/************************************************* -* Clear memory of sensitive data * -*************************************************/ +/* +* Clear memory of sensitive data +*/ void Skipjack::clear() throw() { for(u32bit j = 0; j != 10; ++j) |