Add a the public-domain AES implementation, with a minimal counter-mode wrapper.

/* Copyright 2003 Roger Dingledine */

/* See LICENSE for licensing information */

/* $Id$ */

/* Implements a minimal interface to counter-mode AES. */

#ifndef __AES_H

#define __AES_H

#include <stdint.h>

struct aes_cnt_cipher;

typedef struct aes_cnt_cipher aes_cnt_cipher_t;

aes_cnt_cipher_t* aes_new_cipher();

void aes_free_cipher(aes_cnt_cipher_t *cipher);

void aes_set_key(aes_cnt_cipher_t *cipher, unsigned char *key, int key_bits);

void aes_crypt(aes_cnt_cipher_t *cipher, char *input, int len, char *output);

uint64_t aes_get_counter(aes_cnt_cipher_t *cipher);

void aes_set_counter(aes_cnt_cipher_t *cipher, uint64_t counter);

void aes_adjust_counter(aes_cnt_cipher_t *cipher, long delta);

#endif