1f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project/* LibTomCrypt, modular cryptographic library -- Tom St Denis 2f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * 3f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * LibTomCrypt is a library that provides various cryptographic 4f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * algorithms in a highly modular and flexible manner. 5f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * 6f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * The library is free for all purposes without any express 7f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * guarantee it works. 8f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * 9f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com 10f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project */ 11f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project#include "tomcrypt.h" 12f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 13f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project/** 14f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project @file pmac_shift_xor.c 15f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project PMAC implementation, internal function, by Tom St Denis 16f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project*/ 17f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 18f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project#ifdef LTC_PMAC 19f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 20f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project/** 21f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project Internal function. Performs the state update (adding correct multiple) 22f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project @param pmac The PMAC state. 23f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project*/ 24f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Projectvoid pmac_shift_xor(pmac_state *pmac) 25f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project{ 26f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project int x, y; 27f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project y = pmac_ntz(pmac->block_index++); 28f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project#ifdef LTC_FAST 29f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project for (x = 0; x < pmac->block_len; x += sizeof(LTC_FAST_TYPE)) { 30f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project *((LTC_FAST_TYPE*)((unsigned char *)pmac->Li + x)) ^= 31f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project *((LTC_FAST_TYPE*)((unsigned char *)pmac->Ls[y] + x)); 32f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project } 33f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project#else 34f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project for (x = 0; x < pmac->block_len; x++) { 35f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project pmac->Li[x] ^= pmac->Ls[y][x]; 36f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project } 37f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project#endif 38f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project} 39f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 40f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project#endif 41f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 42f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project/* $Source: /cvs/libtom/libtomcrypt/src/mac/pmac/pmac_shift_xor.c,v $ */ 43f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project/* $Revision: 1.6 $ */ 44f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project/* $Date: 2006/11/03 00:39:49 $ */ 45