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Diffstat (limited to 'modules/alg_ia32/serpent.cpp')
-rw-r--r--modules/alg_ia32/serpent.cpp122
1 files changed, 4 insertions, 118 deletions
diff --git a/modules/alg_ia32/serpent.cpp b/modules/alg_ia32/serpent.cpp
index c6db285c1..4bae0a79c 100644
--- a/modules/alg_ia32/serpent.cpp
+++ b/modules/alg_ia32/serpent.cpp
@@ -8,107 +8,9 @@
namespace Botan {
-namespace {
-
-/*************************************************
-* 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;
- T3 ^= T0; T4 = T1; T1 &= T3; T4 ^= T2; T1 ^= T0; T0 |= T3; T0 ^= T4;
- T4 ^= T3; T3 ^= T2; T2 |= T1; T2 ^= T4; T4 = ~T4; T4 |= T1; T1 ^= T3;
- T1 ^= T4; T3 |= T0; T1 ^= T3; T4 ^= T3;
- B0 = T1; B1 = T4; B2 = T2; B3 = T0;
- }
-
-/*************************************************
-* 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;
- T0 = ~T0; T2 = ~T2; T4 = T0; T0 &= T1; T2 ^= T0; T0 |= T3; T3 ^= T2;
- T1 ^= T0; T0 ^= T4; T4 |= T1; T1 ^= T3; T2 |= T0; T2 &= T4; T0 ^= T1;
- T1 &= T2; T1 ^= T0; T0 &= T2; T0 ^= T4;
- B0 = T2; B1 = T0; B2 = T3; B3 = T1;
- }
-
-/*************************************************
-* 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;
- T4 = T0; T0 &= T2; T0 ^= T3; T2 ^= T1; T2 ^= T0; T3 |= T4; T3 ^= T1;
- T4 ^= T2; T1 = T3; T3 |= T4; T3 ^= T0; T0 &= T1; T4 ^= T0; T1 ^= T3;
- T1 ^= T4; T4 = ~T4;
- B0 = T2; B1 = T3; B2 = T1; B3 = T4;
- }
-
-/*************************************************
-* 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;
- T4 = T0; T0 |= T3; T3 ^= T1; T1 &= T4; T4 ^= T2; T2 ^= T3; T3 &= T0;
- T4 |= T1; T3 ^= T4; T0 ^= T1; T4 &= T0; T1 ^= T3; T4 ^= T2; T1 |= T0;
- T1 ^= T2; T0 ^= T3; T2 = T1; T1 |= T3; T1 ^= T0;
- B0 = T1; B1 = T2; B2 = T3; B3 = T4;
- }
-
-/*************************************************
-* 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;
- T1 ^= T3; T3 = ~T3; T2 ^= T3; T3 ^= T0; T4 = T1; T1 &= T3; T1 ^= T2;
- T4 ^= T3; T0 ^= T4; T2 &= T4; T2 ^= T0; T0 &= T1; T3 ^= T0; T4 |= T1;
- T4 ^= T0; T0 |= T3; T0 ^= T2; T2 &= T3; T0 = ~T0; T4 ^= T2;
- B0 = T1; B1 = T4; B2 = T0; B3 = T3;
- }
-/*************************************************
-* 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;
- T0 ^= T1; T1 ^= T3; T3 = ~T3; T4 = T1; T1 &= T0; T2 ^= T3; T1 ^= T2;
- T2 |= T4; T4 ^= T3; T3 &= T1; T3 ^= T0; T4 ^= T1; T4 ^= T2; T2 ^= T0;
- T0 &= T3; T2 = ~T2; T0 ^= T4; T4 |= T3; T2 ^= T4;
- B0 = T1; B1 = T3; B2 = T0; B3 = T2;
- }
-
-/*************************************************
-* 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;
- T2 = ~T2; T4 = T3; T3 &= T0; T0 ^= T4; T3 ^= T2; T2 |= T4; T1 ^= T3;
- T2 ^= T0; T0 |= T1; T2 ^= T1; T4 ^= T0; T0 |= T3; T0 ^= T2; T4 ^= T3;
- T4 ^= T0; T3 = ~T3; T2 &= T4; T2 ^= T3;
- B0 = T0; B1 = T1; B2 = T4; B3 = T2;
- }
-
-/*************************************************
-* 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;
- T4 = T1; T1 |= T2; T1 ^= T3; T4 ^= T2; T2 ^= T1; T3 |= T4; T3 &= T0;
- T4 ^= T2; T3 ^= T1; T1 |= T4; T1 ^= T0; T0 |= T4; T0 ^= T2; T1 ^= T4;
- T2 ^= T1; T1 &= T0; T1 ^= T4; T2 = ~T2; T2 |= T0; T4 ^= T2;
- B0 = T4; B1 = T3; B2 = T1; B3 = T0;
- }
-
-}
-
extern "C" void serpent_encrypt(const byte[16], byte[16], const u32bit[132]);
extern "C" void serpent_decrypt(const byte[16], byte[16], const u32bit[132]);
+extern "C" void serpent_key_schedule(u32bit[140]);
/*************************************************
* Serpent Encryption *
@@ -137,25 +39,9 @@ void Serpent::key(const byte key[], u32bit length)
for(u32bit j = 0; j != length / 4; ++j)
W[j] = make_u32bit(key[4*j+3], key[4*j+2], key[4*j+1], key[4*j]);
W[length / 4] |= u32bit(1) << ((length%4)*8);
- for(u32bit j = 8; j != 140; ++j)
- W[j] = rotate_left(W[j-8] ^ W[j-5] ^ W[j-3] ^ W[j-1] ^ PHI ^ (j-8), 11);
- SBoxE4(W[ 8],W[ 9],W[ 10],W[ 11]); SBoxE3(W[ 12],W[ 13],W[ 14],W[ 15]);
- SBoxE2(W[ 16],W[ 17],W[ 18],W[ 19]); SBoxE1(W[ 20],W[ 21],W[ 22],W[ 23]);
- SBoxE8(W[ 24],W[ 25],W[ 26],W[ 27]); SBoxE7(W[ 28],W[ 29],W[ 30],W[ 31]);
- SBoxE6(W[ 32],W[ 33],W[ 34],W[ 35]); SBoxE5(W[ 36],W[ 37],W[ 38],W[ 39]);
- SBoxE4(W[ 40],W[ 41],W[ 42],W[ 43]); SBoxE3(W[ 44],W[ 45],W[ 46],W[ 47]);
- SBoxE2(W[ 48],W[ 49],W[ 50],W[ 51]); SBoxE1(W[ 52],W[ 53],W[ 54],W[ 55]);
- SBoxE8(W[ 56],W[ 57],W[ 58],W[ 59]); SBoxE7(W[ 60],W[ 61],W[ 62],W[ 63]);
- SBoxE6(W[ 64],W[ 65],W[ 66],W[ 67]); SBoxE5(W[ 68],W[ 69],W[ 70],W[ 71]);
- SBoxE4(W[ 72],W[ 73],W[ 74],W[ 75]); SBoxE3(W[ 76],W[ 77],W[ 78],W[ 79]);
- SBoxE2(W[ 80],W[ 81],W[ 82],W[ 83]); SBoxE1(W[ 84],W[ 85],W[ 86],W[ 87]);
- SBoxE8(W[ 88],W[ 89],W[ 90],W[ 91]); SBoxE7(W[ 92],W[ 93],W[ 94],W[ 95]);
- SBoxE6(W[ 96],W[ 97],W[ 98],W[ 99]); SBoxE5(W[100],W[101],W[102],W[103]);
- SBoxE4(W[104],W[105],W[106],W[107]); SBoxE3(W[108],W[109],W[110],W[111]);
- SBoxE2(W[112],W[113],W[114],W[115]); SBoxE1(W[116],W[117],W[118],W[119]);
- SBoxE8(W[120],W[121],W[122],W[123]); SBoxE7(W[124],W[125],W[126],W[127]);
- SBoxE6(W[128],W[129],W[130],W[131]); SBoxE5(W[132],W[133],W[134],W[135]);
- SBoxE4(W[136],W[137],W[138],W[139]);
+
+ serpent_key_schedule(W);
+
round_key.copy(W + 8, 132);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 03:27:25 +0000