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 f9_file.c 15f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project f9 support, process a file, Tom St Denis 16f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project*/ 17f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 18f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project#ifdef LTC_F9_MODE 19f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 20f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project/** 21f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project f9 a file 22f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project @param cipher The index of the cipher desired 23f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project @param key The secret key 24f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project @param keylen The length of the secret key (octets) 25f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project @param filename The name of the file you wish to f9 26f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project @param out [out] Where the authentication tag is to be stored 27f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project @param outlen [in/out] The max size and resulting size of the authentication tag 28f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project @return CRYPT_OK if successful, CRYPT_NOP if file support has been disabled 29f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project*/ 30f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Projectint f9_file(int cipher, 31f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project const unsigned char *key, unsigned long keylen, 32f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project const char *filename, 33f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project unsigned char *out, unsigned long *outlen) 34f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project{ 35f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project#ifdef LTC_NO_FILE 36f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project return CRYPT_NOP; 37f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project#else 38f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project int err, x; 39f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project f9_state f9; 40f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project FILE *in; 41f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project unsigned char buf[512]; 42f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 43f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project LTC_ARGCHK(key != NULL); 44f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project LTC_ARGCHK(filename != NULL); 45f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project LTC_ARGCHK(out != NULL); 46f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project LTC_ARGCHK(outlen != NULL); 47f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 48f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project in = fopen(filename, "rb"); 49f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project if (in == NULL) { 50f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project return CRYPT_FILE_NOTFOUND; 51f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project } 52f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 53f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project if ((err = f9_init(&f9, cipher, key, keylen)) != CRYPT_OK) { 54f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project fclose(in); 55f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project return err; 56f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project } 57f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 58f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project do { 59f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project x = fread(buf, 1, sizeof(buf), in); 60f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project if ((err = f9_process(&f9, buf, x)) != CRYPT_OK) { 61f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project fclose(in); 62f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project return err; 63f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project } 64f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project } while (x == sizeof(buf)); 65f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project fclose(in); 66f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 67f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project if ((err = f9_done(&f9, out, outlen)) != CRYPT_OK) { 68f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project return err; 69f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project } 70f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 71f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project#ifdef LTC_CLEAN_STACK 72f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project zeromem(buf, sizeof(buf)); 73f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project#endif 74f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 75f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project return CRYPT_OK; 76f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project#endif 77f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project} 78f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 79f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project#endif 80f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 81f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project/* $Source: /cvs/libtom/libtomcrypt/src/mac/f9/f9_file.c,v $ */ 82f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project/* $Revision: 1.4 $ */ 83f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project/* $Date: 2006/11/21 00:18:23 $ */ 84