-/*
- * Apple's SC 8.8.4f1 and MrC 4.1.0f1c1 refuse to handle these if
- * they've got dimensions (they claim "already defined" when the
- * arrays are actually defined). Microsoft Visual C refuses to handle
- * them without ("unknown size"). Bah.
- *
- * K&R2 A10.2 says both are OK, of course.
- */
-#if defined __SC__ || defined __MRC__
-static const unsigned char Sbox[], Sboxinv[];
-static const word32 E0[], E1[], E2[], E3[];
-static const word32 D0[], D1[], D2[], D3[];
-#else
-static const unsigned char Sbox[256], Sboxinv[256];
-static const word32 E0[256], E1[256], E2[256], E3[256];
-static const word32 D0[256], D1[256], D2[256], D3[256];
-#endif
-
-/*
- * Common macros in both the encryption and decryption routines.
- */
-#define ADD_ROUND_KEY_4 (block[0]^=*keysched++, block[1]^=*keysched++, \
- block[2]^=*keysched++, block[3]^=*keysched++)
-#define ADD_ROUND_KEY_6 (block[0]^=*keysched++, block[1]^=*keysched++, \
- block[2]^=*keysched++, block[3]^=*keysched++, \
- block[4]^=*keysched++, block[5]^=*keysched++)
-#define ADD_ROUND_KEY_8 (block[0]^=*keysched++, block[1]^=*keysched++, \
- block[2]^=*keysched++, block[3]^=*keysched++, \
- block[4]^=*keysched++, block[5]^=*keysched++, \
- block[6]^=*keysched++, block[7]^=*keysched++)
-#define MOVEWORD(i) ( block[i] = newstate[i] )
-
-/*
- * Macros for the encryption routine. There are three encryption
- * cores, for Nb=4,6,8.
- */
-#define MAKEWORD(i) ( newstate[i] = (E0[(block[i] >> 24) & 0xFF] ^ \
- E1[(block[(i+C1)%Nb] >> 16) & 0xFF] ^ \
- E2[(block[(i+C2)%Nb] >> 8) & 0xFF] ^ \
- E3[block[(i+C3)%Nb] & 0xFF]) )
-#define LASTWORD(i) ( newstate[i] = (Sbox[(block[i] >> 24) & 0xFF] << 24) | \
- (Sbox[(block[(i+C1)%Nb] >> 16) & 0xFF] << 16) | \
- (Sbox[(block[(i+C2)%Nb] >> 8) & 0xFF] << 8) | \
- (Sbox[(block[(i+C3)%Nb] ) & 0xFF] ) )
-
-/*
- * Core encrypt routines, expecting word32 inputs read big-endian
- * from the byte-oriented input stream.
- */
-static void aes_encrypt_nb_4(AESContext * ctx, word32 * block)
-{
- int i;
- static const int C1 = 1, C2 = 2, C3 = 3, Nb = 4;
- word32 *keysched = ctx->keysched;
- word32 newstate[4];
- for (i = 0; i < ctx->Nr - 1; i++) {
- ADD_ROUND_KEY_4;
- MAKEWORD(0);
- MAKEWORD(1);
- MAKEWORD(2);
- MAKEWORD(3);
- MOVEWORD(0);
- MOVEWORD(1);
- MOVEWORD(2);
- MOVEWORD(3);
- }
- ADD_ROUND_KEY_4;
- LASTWORD(0);
- LASTWORD(1);
- LASTWORD(2);
- LASTWORD(3);
- MOVEWORD(0);
- MOVEWORD(1);
- MOVEWORD(2);
- MOVEWORD(3);
- ADD_ROUND_KEY_4;
-}
-static void aes_encrypt_nb_6(AESContext * ctx, word32 * block)
-{
- int i;
- static const int C1 = 1, C2 = 2, C3 = 3, Nb = 6;
- word32 *keysched = ctx->keysched;
- word32 newstate[6];
- for (i = 0; i < ctx->Nr - 1; i++) {
- ADD_ROUND_KEY_6;
- MAKEWORD(0);
- MAKEWORD(1);
- MAKEWORD(2);
- MAKEWORD(3);
- MAKEWORD(4);
- MAKEWORD(5);
- MOVEWORD(0);
- MOVEWORD(1);
- MOVEWORD(2);
- MOVEWORD(3);
- MOVEWORD(4);
- MOVEWORD(5);
- }
- ADD_ROUND_KEY_6;
- LASTWORD(0);
- LASTWORD(1);
- LASTWORD(2);
- LASTWORD(3);
- LASTWORD(4);
- LASTWORD(5);
- MOVEWORD(0);
- MOVEWORD(1);
- MOVEWORD(2);
- MOVEWORD(3);
- MOVEWORD(4);
- MOVEWORD(5);
- ADD_ROUND_KEY_6;
-}
-static void aes_encrypt_nb_8(AESContext * ctx, word32 * block)
-{
- int i;
- static const int C1 = 1, C2 = 3, C3 = 4, Nb = 8;
- word32 *keysched = ctx->keysched;
- word32 newstate[8];
- for (i = 0; i < ctx->Nr - 1; i++) {
- ADD_ROUND_KEY_8;
- MAKEWORD(0);
- MAKEWORD(1);
- MAKEWORD(2);
- MAKEWORD(3);
- MAKEWORD(4);
- MAKEWORD(5);
- MAKEWORD(6);
- MAKEWORD(7);
- MOVEWORD(0);
- MOVEWORD(1);
- MOVEWORD(2);
- MOVEWORD(3);
- MOVEWORD(4);
- MOVEWORD(5);
- MOVEWORD(6);
- MOVEWORD(7);
- }
- ADD_ROUND_KEY_8;
- LASTWORD(0);
- LASTWORD(1);
- LASTWORD(2);
- LASTWORD(3);
- LASTWORD(4);
- LASTWORD(5);
- LASTWORD(6);
- LASTWORD(7);
- MOVEWORD(0);
- MOVEWORD(1);
- MOVEWORD(2);
- MOVEWORD(3);
- MOVEWORD(4);
- MOVEWORD(5);
- MOVEWORD(6);
- MOVEWORD(7);
- ADD_ROUND_KEY_8;
-}
-
-#undef MAKEWORD
-#undef LASTWORD
-
-/*
- * Macros for the decryption routine. There are three decryption
- * cores, for Nb=4,6,8.
- */
-#define MAKEWORD(i) ( newstate[i] = (D0[(block[i] >> 24) & 0xFF] ^ \
- D1[(block[(i+C1)%Nb] >> 16) & 0xFF] ^ \
- D2[(block[(i+C2)%Nb] >> 8) & 0xFF] ^ \
- D3[block[(i+C3)%Nb] & 0xFF]) )
-#define LASTWORD(i) (newstate[i] = (Sboxinv[(block[i] >> 24) & 0xFF] << 24) | \
- (Sboxinv[(block[(i+C1)%Nb] >> 16) & 0xFF] << 16) | \
- (Sboxinv[(block[(i+C2)%Nb] >> 8) & 0xFF] << 8) | \
- (Sboxinv[(block[(i+C3)%Nb] ) & 0xFF] ) )
-
-/*
- * Core decrypt routines, expecting word32 inputs read big-endian
- * from the byte-oriented input stream.
- */
-static void aes_decrypt_nb_4(AESContext * ctx, word32 * block)
-{
- int i;
- static const int C1 = 4 - 1, C2 = 4 - 2, C3 = 4 - 3, Nb = 4;
- word32 *keysched = ctx->invkeysched;
- word32 newstate[4];
- for (i = 0; i < ctx->Nr - 1; i++) {
- ADD_ROUND_KEY_4;
- MAKEWORD(0);
- MAKEWORD(1);
- MAKEWORD(2);
- MAKEWORD(3);
- MOVEWORD(0);
- MOVEWORD(1);
- MOVEWORD(2);
- MOVEWORD(3);
- }
- ADD_ROUND_KEY_4;
- LASTWORD(0);
- LASTWORD(1);
- LASTWORD(2);
- LASTWORD(3);
- MOVEWORD(0);
- MOVEWORD(1);
- MOVEWORD(2);
- MOVEWORD(3);
- ADD_ROUND_KEY_4;
-}
-static void aes_decrypt_nb_6(AESContext * ctx, word32 * block)
-{
- int i;
- static const int C1 = 6 - 1, C2 = 6 - 2, C3 = 6 - 3, Nb = 6;
- word32 *keysched = ctx->invkeysched;
- word32 newstate[6];
- for (i = 0; i < ctx->Nr - 1; i++) {
- ADD_ROUND_KEY_6;
- MAKEWORD(0);
- MAKEWORD(1);
- MAKEWORD(2);
- MAKEWORD(3);
- MAKEWORD(4);
- MAKEWORD(5);
- MOVEWORD(0);
- MOVEWORD(1);
- MOVEWORD(2);
- MOVEWORD(3);
- MOVEWORD(4);
- MOVEWORD(5);
- }
- ADD_ROUND_KEY_6;
- LASTWORD(0);
- LASTWORD(1);
- LASTWORD(2);
- LASTWORD(3);
- LASTWORD(4);
- LASTWORD(5);
- MOVEWORD(0);
- MOVEWORD(1);
- MOVEWORD(2);
- MOVEWORD(3);
- MOVEWORD(4);
- MOVEWORD(5);
- ADD_ROUND_KEY_6;
-}
-static void aes_decrypt_nb_8(AESContext * ctx, word32 * block)
-{
- int i;
- static const int C1 = 8 - 1, C2 = 8 - 3, C3 = 8 - 4, Nb = 8;
- word32 *keysched = ctx->invkeysched;
- word32 newstate[8];
- for (i = 0; i < ctx->Nr - 1; i++) {
- ADD_ROUND_KEY_8;
- MAKEWORD(0);
- MAKEWORD(1);
- MAKEWORD(2);
- MAKEWORD(3);
- MAKEWORD(4);
- MAKEWORD(5);
- MAKEWORD(6);
- MAKEWORD(7);
- MOVEWORD(0);
- MOVEWORD(1);
- MOVEWORD(2);
- MOVEWORD(3);
- MOVEWORD(4);
- MOVEWORD(5);
- MOVEWORD(6);
- MOVEWORD(7);
- }
- ADD_ROUND_KEY_8;
- LASTWORD(0);
- LASTWORD(1);
- LASTWORD(2);
- LASTWORD(3);
- LASTWORD(4);
- LASTWORD(5);
- LASTWORD(6);
- LASTWORD(7);
- MOVEWORD(0);
- MOVEWORD(1);
- MOVEWORD(2);
- MOVEWORD(3);
- MOVEWORD(4);
- MOVEWORD(5);
- MOVEWORD(6);
- MOVEWORD(7);
- ADD_ROUND_KEY_8;
-}
-
-#undef MAKEWORD
-#undef LASTWORD
-