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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <openssl/bn.h>
#include <openssl/err.h>
#include "app.h"
#include "../bs.h"
#include "../aes.h"
static void openssl_die(void)
{
fprintf(stderr,"error: %s\n",
ERR_error_string(ERR_get_error(),NULL) );
exit(2);
}
static unsigned int hex2bin(unsigned char ** bin, const char * hex)
{
int len;
BIGNUM * bn = NULL;
if(BN_hex2bn(&bn, (char*)hex) == 0)
{ openssl_die(); }
len = BN_num_bytes(bn);
*bin = (unsigned char *)malloc(len);
if(BN_bn2bin(bn, *bin) == 0)
{ openssl_die(); }
return len;
}
int cli_app(int argc, char * argv[])
{
uint8_t key[16];
uint8_t iv[16];
uint8_t * key_p = NULL, * iv_p = NULL;
int keylen, ivlen;
if (argc != 5)
{
fprintf(stderr,
"Bitsliced AES-CTR\n"
"usage: %s <key-hex> <iv-hex> <input-file> <output-file>\n", argv[0]);
exit(1);
}
char * key_s = argv[1];
char * iv_s = argv[2];
char * input_name = argv[3];
char * output_name = argv[4];
FILE * input = fopen(input_name, "r");
if (input == NULL)
{
perror("fopen");
exit(2);
}
FILE * output = fopen(output_name, "w+");
if (output == NULL)
{
perror("fopen");
exit(2);
}
ERR_load_crypto_strings();
keylen = hex2bin(&key_p,key_s);
if (keylen > 16)
{
free(key_p);
fprintf(stderr,"key must be 16 bytes or less\n");
exit(2);
}
ivlen = hex2bin(&iv_p,iv_s);
if (ivlen > 16)
{
free(iv_p);
free(key_p);
fprintf(stderr,"iv must be 16 bytes or less\n");
exit(2);
}
memset(iv,0,16);
memset(key,0,16);
memmove(iv, iv_p, ivlen);
memmove(key, key_p, keylen);
free(iv_p);
free(key_p);
fseek(input, 0L, SEEK_END);
size_t amt = ftell(input);
fseek(input, 0L, SEEK_SET);
uint8_t * pt = (uint8_t *) malloc(amt);
uint8_t * ct = (uint8_t *) malloc(amt);
int ptlen = fread(pt, 1, amt, input);
if (ptlen != amt)
{
perror("fread");
exit(2);
}
struct timespec tstart,tend;
clock_gettime(CLOCK_MONOTONIC, &tstart);
{
aes_ctr_encrypt(ct, pt, amt, key, iv);
}
clock_gettime(CLOCK_MONOTONIC, &tend);
double total = (((double)tend.tv_sec + 1.0e-9 * (double)tend.tv_nsec) -
((double)tstart.tv_sec + 1.0e-9 * (double)tstart.tv_nsec));
printf("performance for %d word length\n", WORD_SIZE);
printf("-------------------------------\n");
printf("%.5f s\n", total);
printf("%.15f s/byte\n", total/amt);
printf("%.5f cycles/byte (for 4 GHz)\n", 4000ull * (1ull<<20) * total/amt);
if (write(fileno(output), ct, amt) == -1)
{
perror("write");
exit(2);
}
free(ct);
free(pt);
return 0;
}
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