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gen.c
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Sat, May 4, 06:46

gen.c
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#include<stdio.h>
#include<stdlib.h>
static unsigned long long block_count = 0;
static unsigned long long ad_count = 0;
static unsigned long long ae_count = 0;
/* I assume the following:
block contains valid 2 bytes, and the rest is padded with 10*
*/
void pad(unsigned char* block) {
int i;
block[2] = 0x80;
for(i = 3; i<8; i++) block[i] = 0x00;
}
/* I assume the following:
block contains valid 2 bytes, and the rest is padded with 10*
*/
void pad_alt(unsigned char* block) {
int i;
block[14] = block[0];
block[15] = block[1];
block[13] = 0x01;
for(i = 0; i<13; i++) block[i] = 0x00;
}
void print_bytes(FILE *f, unsigned char* block, unsigned long long len) {
int i;
for(i=0; i<len ;i++) fprintf(f, "%02X", block[i]);
fprintf(f, "\n");
}
void generate_ae_inputs(unsigned char *m, unsigned long long *mlen,
unsigned char *ad, unsigned long long *adlen,
unsigned char *npub,
unsigned char *k, unsigned char *incomplete_ad, unsigned char*incomplete_m )
{
int i;
do {
*mlen = (unsigned long long) rand()%9;
*adlen = (unsigned long long) rand()%2;
} while (*adlen + *mlen == 0);
*incomplete_ad = rand()%2 == 0 ? 0x00 : 0x01;
*incomplete_m = rand()%2 == 0 ? 0x00 : 0x01;
for(i=0; i<15; i++) npub[i] = rand() % 256;
for(i=0; i<16; i++) k[i] = rand() % 256;
for(i=0; i<16*(*mlen); i++) m[i] = rand() % 256;
for(i=0; i<16*(*adlen); i++) ad[i] = rand() % 256;
// pad if incomplete
if (*incomplete_ad == 0x01 && *adlen >0) {
pad(ad + 8*(*adlen - 1));
}
if (*incomplete_m == 0x01 && *mlen >0) {
pad(m + 8*(*mlen - 1));
}
}
void save_aead(FILE *in,
unsigned char *m, unsigned long long *mlen,
unsigned char *ad, unsigned long long *adlen,
unsigned char *npub,
unsigned char *k, unsigned char* incomplete_ad, unsigned char* incomplete_m)
{
int j;
fprintf(in, "%d ", (int) *adlen);
fprintf(in, "%d ", (int) *mlen);
fprintf(in, "%d ", (int) *incomplete_ad);
fprintf(in, "%d\n", (int) *incomplete_m);
print_bytes(in, k, 16);
print_bytes(in, npub, 15);
for(j=0; j<*adlen; j++) print_bytes(in, ad+8*j, 8);
for(j=0; j<*mlen; j++) print_bytes(in, m+8*j, 8);
//for(j=0; j<*mlen; j++) print_bytes(in, m+16*j, 16);
block_count += *mlen;
ad_count += *adlen;
ae_count += 1;
}
int main() {
FILE *in = fopen("IN_1000", "w");
srand(0); // seed randomness source
unsigned char m[128]; // so we can accommodate 128*8 bits
unsigned char k[16]; // assuming key is 128 bits
unsigned char ad[16]; // assuming ad is at most 128 bits
unsigned char npub[16]; // assuming nonce is at most 128 bits
unsigned long long mlen, adlen;
unsigned char incomplete_ad, incomplete_m;
int j;
for(j=0; j<1000; j++) { fprintf(in, "%d ", j);
generate_ae_inputs(m, &mlen, ad, &adlen, npub, k, &incomplete_ad, &incomplete_m);
save_aead(in, m, &mlen, ad, &adlen, npub, k, &incomplete_ad, &incomplete_m);
}
fclose(in);
printf("# of ae calls = %llu\n", ae_count);
printf("# of ad blocks = %llu\n", ad_count);
printf("# of msg blocks = %llu\n", block_count);
}

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