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-rw-r--r--src/block/skipjack/skipjack.cpp68
1 files changed, 40 insertions, 28 deletions
diff --git a/src/block/skipjack/skipjack.cpp b/src/block/skipjack/skipjack.cpp
index f5ffc861e..6c308c0f8 100644
--- a/src/block/skipjack/skipjack.cpp
+++ b/src/block/skipjack/skipjack.cpp
@@ -13,51 +13,63 @@ namespace Botan {
/*
* Skipjack Encryption
*/
-void Skipjack::enc(const byte in[], byte out[]) const
+void Skipjack::encrypt_n(const byte in[], byte out[], u32bit blocks) const
{
- u16bit W1 = load_le<u16bit>(in, 3);
- u16bit W2 = load_le<u16bit>(in, 2);
- u16bit W3 = load_le<u16bit>(in, 1);
- u16bit W4 = load_le<u16bit>(in, 0);
+ for(u32bit i = 0; i != blocks; ++i)
+ {
+ u16bit W1 = load_le<u16bit>(in, 3);
+ u16bit W2 = load_le<u16bit>(in, 2);
+ u16bit W3 = load_le<u16bit>(in, 1);
+ u16bit W4 = load_le<u16bit>(in, 0);
- step_A(W1,W4, 1); step_A(W4,W3, 2); step_A(W3,W2, 3); step_A(W2,W1, 4);
- step_A(W1,W4, 5); step_A(W4,W3, 6); step_A(W3,W2, 7); step_A(W2,W1, 8);
+ step_A(W1,W4, 1); step_A(W4,W3, 2); step_A(W3,W2, 3); step_A(W2,W1, 4);
+ step_A(W1,W4, 5); step_A(W4,W3, 6); step_A(W3,W2, 7); step_A(W2,W1, 8);
- step_B(W1,W2, 9); step_B(W4,W1,10); step_B(W3,W4,11); step_B(W2,W3,12);
- step_B(W1,W2,13); step_B(W4,W1,14); step_B(W3,W4,15); step_B(W2,W3,16);
+ step_B(W1,W2, 9); step_B(W4,W1,10); step_B(W3,W4,11); step_B(W2,W3,12);
+ step_B(W1,W2,13); step_B(W4,W1,14); step_B(W3,W4,15); step_B(W2,W3,16);
- step_A(W1,W4,17); step_A(W4,W3,18); step_A(W3,W2,19); step_A(W2,W1,20);
- step_A(W1,W4,21); step_A(W4,W3,22); step_A(W3,W2,23); step_A(W2,W1,24);
+ step_A(W1,W4,17); step_A(W4,W3,18); step_A(W3,W2,19); step_A(W2,W1,20);
+ step_A(W1,W4,21); step_A(W4,W3,22); step_A(W3,W2,23); step_A(W2,W1,24);
- step_B(W1,W2,25); step_B(W4,W1,26); step_B(W3,W4,27); step_B(W2,W3,28);
- step_B(W1,W2,29); step_B(W4,W1,30); step_B(W3,W4,31); step_B(W2,W3,32);
+ step_B(W1,W2,25); step_B(W4,W1,26); step_B(W3,W4,27); step_B(W2,W3,28);
+ step_B(W1,W2,29); step_B(W4,W1,30); step_B(W3,W4,31); step_B(W2,W3,32);
- store_le(out, W4, W3, W2, W1);
+ store_le(out, W4, W3, W2, W1);
+
+ in += BLOCK_SIZE;
+ out += BLOCK_SIZE;
+ }
}
/*
* Skipjack Decryption
*/
-void Skipjack::dec(const byte in[], byte out[]) const
+void Skipjack::decrypt_n(const byte in[], byte out[], u32bit blocks) const
{
- u16bit W1 = load_le<u16bit>(in, 3);
- u16bit W2 = load_le<u16bit>(in, 2);
- u16bit W3 = load_le<u16bit>(in, 1);
- u16bit W4 = load_le<u16bit>(in, 0);
+ for(u32bit i = 0; i != blocks; ++i)
+ {
+ u16bit W1 = load_le<u16bit>(in, 3);
+ u16bit W2 = load_le<u16bit>(in, 2);
+ u16bit W3 = load_le<u16bit>(in, 1);
+ u16bit W4 = load_le<u16bit>(in, 0);
+
+ step_Bi(W2,W3,32); step_Bi(W3,W4,31); step_Bi(W4,W1,30); step_Bi(W1,W2,29);
+ step_Bi(W2,W3,28); step_Bi(W3,W4,27); step_Bi(W4,W1,26); step_Bi(W1,W2,25);
- step_Bi(W2,W3,32); step_Bi(W3,W4,31); step_Bi(W4,W1,30); step_Bi(W1,W2,29);
- step_Bi(W2,W3,28); step_Bi(W3,W4,27); step_Bi(W4,W1,26); step_Bi(W1,W2,25);
+ step_Ai(W1,W2,24); step_Ai(W2,W3,23); step_Ai(W3,W4,22); step_Ai(W4,W1,21);
+ step_Ai(W1,W2,20); step_Ai(W2,W3,19); step_Ai(W3,W4,18); step_Ai(W4,W1,17);
- step_Ai(W1,W2,24); step_Ai(W2,W3,23); step_Ai(W3,W4,22); step_Ai(W4,W1,21);
- step_Ai(W1,W2,20); step_Ai(W2,W3,19); step_Ai(W3,W4,18); step_Ai(W4,W1,17);
+ step_Bi(W2,W3,16); step_Bi(W3,W4,15); step_Bi(W4,W1,14); step_Bi(W1,W2,13);
+ step_Bi(W2,W3,12); step_Bi(W3,W4,11); step_Bi(W4,W1,10); step_Bi(W1,W2, 9);
- step_Bi(W2,W3,16); step_Bi(W3,W4,15); step_Bi(W4,W1,14); step_Bi(W1,W2,13);
- step_Bi(W2,W3,12); step_Bi(W3,W4,11); step_Bi(W4,W1,10); step_Bi(W1,W2, 9);
+ step_Ai(W1,W2, 8); step_Ai(W2,W3, 7); step_Ai(W3,W4, 6); step_Ai(W4,W1, 5);
+ step_Ai(W1,W2, 4); step_Ai(W2,W3, 3); step_Ai(W3,W4, 2); step_Ai(W4,W1, 1);
- step_Ai(W1,W2, 8); step_Ai(W2,W3, 7); step_Ai(W3,W4, 6); step_Ai(W4,W1, 5);
- step_Ai(W1,W2, 4); step_Ai(W2,W3, 3); step_Ai(W3,W4, 2); step_Ai(W4,W1, 1);
+ store_le(out, W4, W3, W2, W1);
- store_le(out, W4, W3, W2, W1);
+ in += BLOCK_SIZE;
+ out += BLOCK_SIZE;
+ }
}
/*