Split ciphers into block and stream ciphers. Move base class headers

1 files changed, 263 insertions, 0 deletions

diff --git a/src/block/des/des.cpp b/src/block/des/des.cpp
new file mode 100644
index 000000000..53a1a278e
--- /dev/null
+++ b/src/block/des/des.cpp
@@ -0,0 +1,263 @@
+/*************************************************
+* DES Source File                                *
+* (C) 1999-2008 Jack Lloyd                       *
+*************************************************/
+
+#include <botan/des.h>
+#include <botan/loadstor.h>
+
+namespace Botan {
+
+namespace {
+
+/*************************************************
+* DES Key Schedule                               *
+*************************************************/
+void des_key_schedule(u32bit round_key[32], const byte key[8])
+   {
+   static const byte ROT[16] = { 1, 1, 2, 2, 2, 2, 2, 2,
+                                 1, 2, 2, 2, 2, 2, 2, 1 };
+
+   u32bit C = ((key[7] & 0x80) << 20) | ((key[6] & 0x80) << 19) |
+              ((key[5] & 0x80) << 18) | ((key[4] & 0x80) << 17) |
+              ((key[3] & 0x80) << 16) | ((key[2] & 0x80) << 15) |
+              ((key[1] & 0x80) << 14) | ((key[0] & 0x80) << 13) |
+              ((key[7] & 0x40) << 13) | ((key[6] & 0x40) << 12) |
+              ((key[5] & 0x40) << 11) | ((key[4] & 0x40) << 10) |
+              ((key[3] & 0x40) <<  9) | ((key[2] & 0x40) <<  8) |
+              ((key[1] & 0x40) <<  7) | ((key[0] & 0x40) <<  6) |
+              ((key[7] & 0x20) <<  6) | ((key[6] & 0x20) <<  5) |
+              ((key[5] & 0x20) <<  4) | ((key[4] & 0x20) <<  3) |
+              ((key[3] & 0x20) <<  2) | ((key[2] & 0x20) <<  1) |
+              ((key[1] & 0x20)      ) | ((key[0] & 0x20) >>  1) |
+              ((key[7] & 0x10) >>  1) | ((key[6] & 0x10) >>  2) |
+              ((key[5] & 0x10) >>  3) | ((key[4] & 0x10) >>  4);
+   u32bit D = ((key[7] & 0x02) << 26) | ((key[6] & 0x02) << 25) |
+              ((key[5] & 0x02) << 24) | ((key[4] & 0x02) << 23) |
+              ((key[3] & 0x02) << 22) | ((key[2] & 0x02) << 21) |
+              ((key[1] & 0x02) << 20) | ((key[0] & 0x02) << 19) |
+              ((key[7] & 0x04) << 17) | ((key[6] & 0x04) << 16) |
+              ((key[5] & 0x04) << 15) | ((key[4] & 0x04) << 14) |
+              ((key[3] & 0x04) << 13) | ((key[2] & 0x04) << 12) |
+              ((key[1] & 0x04) << 11) | ((key[0] & 0x04) << 10) |
+              ((key[7] & 0x08) <<  8) | ((key[6] & 0x08) <<  7) |
+              ((key[5] & 0x08) <<  6) | ((key[4] & 0x08) <<  5) |
+              ((key[3] & 0x08) <<  4) | ((key[2] & 0x08) <<  3) |
+              ((key[1] & 0x08) <<  2) | ((key[0] & 0x08) <<  1) |
+              ((key[3] & 0x10) >>  1) | ((key[2] & 0x10) >>  2) |
+              ((key[1] & 0x10) >>  3) | ((key[0] & 0x10) >>  4);
+
+   for(u32bit j = 0; j != 16; ++j)
+      {
+      C = ((C << ROT[j]) | (C >> (28-ROT[j]))) & 0x0FFFFFFF;
+      D = ((D << ROT[j]) | (D >> (28-ROT[j]))) & 0x0FFFFFFF;
+      round_key[2*j  ] = ((C & 0x00000010) << 22) | ((C & 0x00000800) << 17) |
+                         ((C & 0x00000020) << 16) | ((C & 0x00004004) << 15) |
+                         ((C & 0x00000200) << 11) | ((C & 0x00020000) << 10) |
+                         ((C & 0x01000000) >>  6) | ((C & 0x00100000) >>  4) |
+                         ((C & 0x00010000) <<  3) | ((C & 0x08000000) >>  2) |
+                         ((C & 0x00800000) <<  1) | ((D & 0x00000010) <<  8) |
+                         ((D & 0x00000002) <<  7) | ((D & 0x00000001) <<  2) |
+                         ((D & 0x00000200)      ) | ((D & 0x00008000) >>  2) |
+                         ((D & 0x00000088) >>  3) | ((D & 0x00001000) >>  7) |
+                         ((D & 0x00080000) >>  9) | ((D & 0x02020000) >> 14) |
+                         ((D & 0x00400000) >> 21);
+      round_key[2*j+1] = ((C & 0x00000001) << 28) | ((C & 0x00000082) << 18) |
+                         ((C & 0x00002000) << 14) | ((C & 0x00000100) << 10) |
+                         ((C & 0x00001000) <<  9) | ((C & 0x00040000) <<  6) |
+                         ((C & 0x02400000) <<  4) | ((C & 0x00008000) <<  2) |
+                         ((C & 0x00200000) >>  1) | ((C & 0x04000000) >> 10) |
+                         ((D & 0x00000020) <<  6) | ((D & 0x00000100)      ) |
+                         ((D & 0x00000800) >>  1) | ((D & 0x00000040) >>  3) |
+                         ((D & 0x00010000) >>  4) | ((D & 0x00000400) >>  5) |
+                         ((D & 0x00004000) >> 10) | ((D & 0x04000000) >> 13) |
+                         ((D & 0x00800000) >> 14) | ((D & 0x00100000) >> 18) |
+                         ((D & 0x01000000) >> 24) | ((D & 0x08000000) >> 26);
+      }
+   }
+
+/*************************************************
+* DES Encryption                                 *
+*************************************************/
+void des_encrypt(u32bit& L, u32bit& R,
+                 const u32bit round_key[32])
+   {
+   for(u32bit j = 0; j != 16; j += 2)
+      {
+      u32bit T0, T1;
+
+      T0 = rotate_right(R, 4) ^ round_key[2*j];
+      T1 =              R     ^ round_key[2*j + 1];
+
+      L ^= DES_SPBOX1[get_byte(0, T0)] ^ DES_SPBOX2[get_byte(0, T1)] ^
+           DES_SPBOX3[get_byte(1, T0)] ^ DES_SPBOX4[get_byte(1, T1)] ^
+           DES_SPBOX5[get_byte(2, T0)] ^ DES_SPBOX6[get_byte(2, T1)] ^
+           DES_SPBOX7[get_byte(3, T0)] ^ DES_SPBOX8[get_byte(3, T1)];
+
+      T0 = rotate_right(L, 4) ^ round_key[2*j + 2];
+      T1 =              L     ^ round_key[2*j + 3];
+
+      R ^= DES_SPBOX1[get_byte(0, T0)] ^ DES_SPBOX2[get_byte(0, T1)] ^
+           DES_SPBOX3[get_byte(1, T0)] ^ DES_SPBOX4[get_byte(1, T1)] ^
+           DES_SPBOX5[get_byte(2, T0)] ^ DES_SPBOX6[get_byte(2, T1)] ^
+           DES_SPBOX7[get_byte(3, T0)] ^ DES_SPBOX8[get_byte(3, T1)];
+      }
+   }
+
+/*************************************************
+* DES Decryption                                 *
+*************************************************/
+void des_decrypt(u32bit& L, u32bit& R,
+                 const u32bit round_key[32])
+   {
+   for(u32bit j = 16; j != 0; j -= 2)
+      {
+      u32bit T0, T1;
+
+      T0 = rotate_right(R, 4) ^ round_key[2*j - 2];
+      T1 =              R     ^ round_key[2*j - 1];
+
+      L ^= DES_SPBOX1[get_byte(0, T0)] ^ DES_SPBOX2[get_byte(0, T1)] ^
+           DES_SPBOX3[get_byte(1, T0)] ^ DES_SPBOX4[get_byte(1, T1)] ^
+           DES_SPBOX5[get_byte(2, T0)] ^ DES_SPBOX6[get_byte(2, T1)] ^
+           DES_SPBOX7[get_byte(3, T0)] ^ DES_SPBOX8[get_byte(3, T1)];
+
+      T0 = rotate_right(L, 4) ^ round_key[2*j - 4];
+      T1 =              L     ^ round_key[2*j - 3];
+
+      R ^= DES_SPBOX1[get_byte(0, T0)] ^ DES_SPBOX2[get_byte(0, T1)] ^
+           DES_SPBOX3[get_byte(1, T0)] ^ DES_SPBOX4[get_byte(1, T1)] ^
+           DES_SPBOX5[get_byte(2, T0)] ^ DES_SPBOX6[get_byte(2, T1)] ^
+           DES_SPBOX7[get_byte(3, T0)] ^ DES_SPBOX8[get_byte(3, T1)];
+      }
+   }
+
+}
+
+/*************************************************
+* DES Encryption                                 *
+*************************************************/
+void DES::enc(const byte in[], byte out[]) const
+   {
+   u64bit T = (DES_IPTAB1[in[0]]     ) | (DES_IPTAB1[in[1]] << 1) |
+              (DES_IPTAB1[in[2]] << 2) | (DES_IPTAB1[in[3]] << 3) |
+              (DES_IPTAB1[in[4]] << 4) | (DES_IPTAB1[in[5]] << 5) |
+              (DES_IPTAB1[in[6]] << 6) | (DES_IPTAB2[in[7]]     );
+
+   u32bit L = static_cast<u32bit>(T >> 32);
+   u32bit R = static_cast<u32bit>(T);
+
+   des_encrypt(L, R, round_key);
+
+   T = (DES_FPTAB1[get_byte(0, L)] << 5) | (DES_FPTAB1[get_byte(1, L)] << 3) |
+       (DES_FPTAB1[get_byte(2, L)] << 1) | (DES_FPTAB2[get_byte(3, L)] << 1) |
+       (DES_FPTAB1[get_byte(0, R)] << 4) | (DES_FPTAB1[get_byte(1, R)] << 2) |
+       (DES_FPTAB1[get_byte(2, R)]     ) | (DES_FPTAB2[get_byte(3, R)]     );
+
+   T = rotate_left(T, 32);
+
+   store_be(T, out);
+   }
+
+/*************************************************
+* DES Decryption                                 *
+*************************************************/
+void DES::dec(const byte in[], byte out[]) const
+   {
+   u64bit T = (DES_IPTAB1[in[0]]     ) | (DES_IPTAB1[in[1]] << 1) |
+              (DES_IPTAB1[in[2]] << 2) | (DES_IPTAB1[in[3]] << 3) |
+              (DES_IPTAB1[in[4]] << 4) | (DES_IPTAB1[in[5]] << 5) |
+              (DES_IPTAB1[in[6]] << 6) | (DES_IPTAB2[in[7]]     );
+
+   u32bit L = static_cast<u32bit>(T >> 32);
+   u32bit R = static_cast<u32bit>(T);
+
+   des_decrypt(L, R, round_key);
+
+   T = (DES_FPTAB1[get_byte(0, L)] << 5) | (DES_FPTAB1[get_byte(1, L)] << 3) |
+       (DES_FPTAB1[get_byte(2, L)] << 1) | (DES_FPTAB2[get_byte(3, L)] << 1) |
+       (DES_FPTAB1[get_byte(0, R)] << 4) | (DES_FPTAB1[get_byte(1, R)] << 2) |
+       (DES_FPTAB1[get_byte(2, R)]     ) | (DES_FPTAB2[get_byte(3, R)]     );
+
+   T = rotate_left(T, 32);
+
+   store_be(T, out);
+   }
+
+/*************************************************
+* DES Key Schedule                               *
+*************************************************/
+void DES::key(const byte key[], u32bit)
+   {
+   des_key_schedule(round_key.begin(), key);
+   }
+
+/*************************************************
+* TripleDES Encryption                           *
+*************************************************/
+void TripleDES::enc(const byte in[], byte out[]) const
+   {
+   u64bit T = (DES_IPTAB1[in[0]]     ) | (DES_IPTAB1[in[1]] << 1) |
+              (DES_IPTAB1[in[2]] << 2) | (DES_IPTAB1[in[3]] << 3) |
+              (DES_IPTAB1[in[4]] << 4) | (DES_IPTAB1[in[5]] << 5) |
+              (DES_IPTAB1[in[6]] << 6) | (DES_IPTAB2[in[7]]     );
+
+   u32bit L = static_cast<u32bit>(T >> 32);
+   u32bit R = static_cast<u32bit>(T);
+
+   des_encrypt(L, R, round_key);
+   des_decrypt(R, L, round_key + 32);
+   des_encrypt(L, R, round_key + 64);
+
+   T = (DES_FPTAB1[get_byte(0, L)] << 5) | (DES_FPTAB1[get_byte(1, L)] << 3) |
+       (DES_FPTAB1[get_byte(2, L)] << 1) | (DES_FPTAB2[get_byte(3, L)] << 1) |
+       (DES_FPTAB1[get_byte(0, R)] << 4) | (DES_FPTAB1[get_byte(1, R)] << 2) |
+       (DES_FPTAB1[get_byte(2, R)]     ) | (DES_FPTAB2[get_byte(3, R)]     );
+
+   T = rotate_left(T, 32);
+
+   store_be(T, out);
+   }
+
+/*************************************************
+* TripleDES Decryption                           *
+*************************************************/
+void TripleDES::dec(const byte in[], byte out[]) const
+   {
+   u64bit T = (DES_IPTAB1[in[0]]     ) | (DES_IPTAB1[in[1]] << 1) |
+              (DES_IPTAB1[in[2]] << 2) | (DES_IPTAB1[in[3]] << 3) |
+              (DES_IPTAB1[in[4]] << 4) | (DES_IPTAB1[in[5]] << 5) |
+              (DES_IPTAB1[in[6]] << 6) | (DES_IPTAB2[in[7]]     );
+
+   u32bit L = static_cast<u32bit>(T >> 32);
+   u32bit R = static_cast<u32bit>(T);
+
+   des_decrypt(L, R, round_key + 64);
+   des_encrypt(R, L, round_key + 32);
+   des_decrypt(L, R, round_key);
+
+   T = (DES_FPTAB1[get_byte(0, L)] << 5) | (DES_FPTAB1[get_byte(1, L)] << 3) |
+       (DES_FPTAB1[get_byte(2, L)] << 1) | (DES_FPTAB2[get_byte(3, L)] << 1) |
+       (DES_FPTAB1[get_byte(0, R)] << 4) | (DES_FPTAB1[get_byte(1, R)] << 2) |
+       (DES_FPTAB1[get_byte(2, R)]     ) | (DES_FPTAB2[get_byte(3, R)]     );
+
+   T = rotate_left(T, 32);
+
+   store_be(T, out);
+   }
+
+/*************************************************
+* TripleDES Key Schedule                         *
+*************************************************/
+void TripleDES::key(const byte key[], u32bit length)
+   {
+   des_key_schedule(&round_key[0], key);
+   des_key_schedule(&round_key[32], key + 8);
+
+   if(length == 24)
+      des_key_schedule(&round_key[64], key + 16);
+   else
+      copy_mem(&round_key[64], round_key.begin(), 32);
+   }
+
+}