1 /* $OpenBSD: cipher-aesctr.h,v 1.1 2014/04/29 15:39:33 markus Exp $ */ 2 /* 3 * Copyright (c) 2014 Markus Friedl 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #ifndef OPENSSH_AESCTR_H 19 #define OPENSSH_AESCTR_H 20 21 #include "rijndael.h" 22 23 #define AES_BLOCK_SIZE 16 24 25 typedef struct aesctr_ctx { 26 int rounds; /* keylen-dependent #rounds */ 27 u32 ek[4*(AES_MAXROUNDS + 1)]; /* encrypt key schedule */ 28 u8 ctr[AES_BLOCK_SIZE]; /* counter */ 29 } aesctr_ctx; 30 31 void aesctr_keysetup(aesctr_ctx *x,const u8 *k,u32 kbits,u32 ivbits); 32 void aesctr_ivsetup(aesctr_ctx *x,const u8 *iv); 33 void aesctr_encrypt_bytes(aesctr_ctx *x,const u8 *m,u8 *c,u32 bytes); 34 35 #endif 36
