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-rw-r--r--src/block/serpent/serpent.cpp142
1 files changed, 72 insertions, 70 deletions
diff --git a/src/block/serpent/serpent.cpp b/src/block/serpent/serpent.cpp
index 07ff8b2cf..0c4589510 100644
--- a/src/block/serpent/serpent.cpp
+++ b/src/block/serpent/serpent.cpp
@@ -1,7 +1,9 @@
-/*************************************************
-* Serpent Source File *
-* (C) 1999-2007 Jack Lloyd *
-*************************************************/
+/*
+* Serpent
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
#include <botan/serpent.h>
#include <botan/loadstor.h>
@@ -11,9 +13,9 @@ namespace Botan {
namespace {
-/*************************************************
-* Serpent Encryption S-Box 1 *
-*************************************************/
+/*
+* Serpent Encryption S-Box 1
+*/
inline void SBoxE1(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
u32bit T0 = B0, T1 = B1, T2 = B2, T3 = B3, T4;
@@ -23,9 +25,9 @@ inline void SBoxE1(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = T1; B1 = T4; B2 = T2; B3 = T0;
}
-/*************************************************
-* Serpent Encryption S-Box 2 *
-*************************************************/
+/*
+* Serpent Encryption S-Box 2
+*/
inline void SBoxE2(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
u32bit T0 = B0, T1 = B1, T2 = B2, T3 = B3, T4;
@@ -35,9 +37,9 @@ inline void SBoxE2(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = T2; B1 = T0; B2 = T3; B3 = T1;
}
-/*************************************************
-* Serpent Encryption S-Box 3 *
-*************************************************/
+/*
+* Serpent Encryption S-Box 3
+*/
inline void SBoxE3(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
u32bit T0 = B0, T1 = B1, T2 = B2, T3 = B3, T4;
@@ -47,9 +49,9 @@ inline void SBoxE3(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = T2; B1 = T3; B2 = T1; B3 = T4;
}
-/*************************************************
-* Serpent Encryption S-Box 4 *
-*************************************************/
+/*
+* Serpent Encryption S-Box 4
+*/
inline void SBoxE4(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
u32bit T0 = B0, T1 = B1, T2 = B2, T3 = B3, T4;
@@ -59,9 +61,9 @@ inline void SBoxE4(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = T1; B1 = T2; B2 = T3; B3 = T4;
}
-/*************************************************
-* Serpent Encryption S-Box 5 *
-*************************************************/
+/*
+* Serpent Encryption S-Box 5
+*/
inline void SBoxE5(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
u32bit T0 = B0, T1 = B1, T2 = B2, T3 = B3, T4;
@@ -71,9 +73,9 @@ inline void SBoxE5(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = T1; B1 = T4; B2 = T0; B3 = T3;
}
-/*************************************************
-* Serpent Encryption S-Box 6 *
-*************************************************/
+/*
+* Serpent Encryption S-Box 6
+*/
inline void SBoxE6(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
u32bit T0 = B0, T1 = B1, T2 = B2, T3 = B3, T4;
@@ -83,9 +85,9 @@ inline void SBoxE6(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = T1; B1 = T3; B2 = T0; B3 = T2;
}
-/*************************************************
-* Serpent Encryption S-Box 7 *
-*************************************************/
+/*
+* Serpent Encryption S-Box 7
+*/
inline void SBoxE7(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
u32bit T0 = B0, T1 = B1, T2 = B2, T3 = B3, T4;
@@ -95,9 +97,9 @@ inline void SBoxE7(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = T0; B1 = T1; B2 = T4; B3 = T2;
}
-/*************************************************
-* Serpent Encryption S-Box 8 *
-*************************************************/
+/*
+* Serpent Encryption S-Box 8
+*/
inline void SBoxE8(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
u32bit T0 = B0, T1 = B1, T2 = B2, T3 = B3, T4;
@@ -107,9 +109,9 @@ inline void SBoxE8(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = T4; B1 = T3; B2 = T1; B3 = T0;
}
-/*************************************************
-* Serpent Decryption S-Box 1 *
-*************************************************/
+/*
+* Serpent Decryption S-Box 1
+*/
inline void SBoxD1(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
u32bit T0 = B0, T1 = B1, T2 = B2, T3 = B3, T4;
@@ -119,9 +121,9 @@ inline void SBoxD1(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = T0; B1 = T4; B2 = T1; B3 = T3;
}
-/*************************************************
-* Serpent Decryption S-Box 2 *
-*************************************************/
+/*
+* Serpent Decryption S-Box 2
+*/
inline void SBoxD2(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
u32bit T0 = B0, T1 = B1, T2 = B2, T3 = B3, T4;
@@ -131,9 +133,9 @@ inline void SBoxD2(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = T4; B1 = T0; B2 = T3; B3 = T2;
}
-/*************************************************
-* Serpent Decryption S-Box 3 *
-*************************************************/
+/*
+* Serpent Decryption S-Box 3
+*/
inline void SBoxD3(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
u32bit T0 = B0, T1 = B1, T2 = B2, T3 = B3, T4;
@@ -143,9 +145,9 @@ inline void SBoxD3(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = T1; B1 = T4; B2 = T2; B3 = T3;
}
-/*************************************************
-* Serpent Decryption S-Box 4 *
-*************************************************/
+/*
+* Serpent Decryption S-Box 4
+*/
inline void SBoxD4(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
u32bit T0 = B0, T1 = B1, T2 = B2, T3 = B3, T4;
@@ -155,9 +157,9 @@ inline void SBoxD4(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = T2; B1 = T1; B2 = T3; B3 = T0;
}
-/*************************************************
-* Serpent Decryption S-Box 5 *
-*************************************************/
+/*
+* Serpent Decryption S-Box 5
+*/
inline void SBoxD5(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
u32bit T0 = B0, T1 = B1, T2 = B2, T3 = B3, T4;
@@ -167,9 +169,9 @@ inline void SBoxD5(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = T0; B1 = T3; B2 = T2; B3 = T4;
}
-/*************************************************
-* Serpent Decryption S-Box 6 *
-*************************************************/
+/*
+* Serpent Decryption S-Box 6
+*/
inline void SBoxD6(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
u32bit T0 = B0, T1 = B1, T2 = B2, T3 = B3, T4;
@@ -179,9 +181,9 @@ inline void SBoxD6(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = T1; B1 = T4; B2 = T3; B3 = T2;
}
-/*************************************************
-* Serpent Decryption S-Box 7 *
-*************************************************/
+/*
+* Serpent Decryption S-Box 7
+*/
inline void SBoxD7(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
u32bit T0 = B0, T1 = B1, T2 = B2, T3 = B3, T4;
@@ -191,9 +193,9 @@ inline void SBoxD7(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = T1; B1 = T2; B2 = T4; B3 = T3;
}
-/*************************************************
-* Serpent Decryption S-Box 8 *
-*************************************************/
+/*
+* Serpent Decryption S-Box 8
+*/
inline void SBoxD8(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
u32bit T0 = B0, T1 = B1, T2 = B2, T3 = B3, T4;
@@ -203,9 +205,9 @@ inline void SBoxD8(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = T3; B1 = T0; B2 = T1; B3 = T4;
}
-/*************************************************
-* Serpent's Linear Transformation *
-*************************************************/
+/*
+* Serpent's Linear Transformation
+*/
inline void transform(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
B0 = rotate_left(B0, 13); B2 = rotate_left(B2, 3);
@@ -215,9 +217,9 @@ inline void transform(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
B0 = rotate_left(B0, 5); B2 = rotate_left(B2, 22);
}
-/*************************************************
-* Serpent's Inverse Linear Transformation *
-*************************************************/
+/*
+* Serpent's Inverse Linear Transformation
+*/
inline void i_transform(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
{
B2 = rotate_right(B2, 22); B0 = rotate_right(B0, 5);
@@ -229,18 +231,18 @@ inline void i_transform(u32bit& B0, u32bit& B1, u32bit& B2, u32bit& B3)
}
-/*************************************************
-* XOR a key block with a data block *
-*************************************************/
+/*
+* XOR a key block with a data block
+*/
#define key_xor(round, B0, B1, B2, B3) \
B0 ^= round_key[4*round ]; \
B1 ^= round_key[4*round+1]; \
B2 ^= round_key[4*round+2]; \
B3 ^= round_key[4*round+3];
-/*************************************************
-* Serpent Encryption *
-*************************************************/
+/*
+* Serpent Encryption
+*/
void Serpent::enc(const byte in[], byte out[]) const
{
u32bit B0 = load_le<u32bit>(in, 0);
@@ -284,9 +286,9 @@ void Serpent::enc(const byte in[], byte out[]) const
store_le(out, B0, B1, B2, B3);
}
-/*************************************************
-* Serpent Decryption *
-*************************************************/
+/*
+* Serpent Decryption
+*/
void Serpent::dec(const byte in[], byte out[]) const
{
u32bit B0 = load_le<u32bit>(in, 0);
@@ -330,9 +332,9 @@ void Serpent::dec(const byte in[], byte out[]) const
store_le(out, B0, B1, B2, B3);
}
-/*************************************************
-* Serpent Key Schedule *
-*************************************************/
+/*
+* Serpent Key Schedule
+*/
void Serpent::key_schedule(const byte key[], u32bit length)
{
const u32bit PHI = 0x9E3779B9;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 11:17:29 +0000