1 #include <stdio.h>
2 #include <stdlib.h>
3 #include "crypto_box.h"
4 #include "randombytes.h"
5
6 unsigned char alicesk[crypto_box_SECRETKEYBYTES];
7 unsigned char alicepk[crypto_box_PUBLICKEYBYTES];
8 unsigned char bobsk[crypto_box_SECRETKEYBYTES];
9 unsigned char bobpk[crypto_box_PUBLICKEYBYTES];
10 unsigned char n[crypto_box_NONCEBYTES];
11 unsigned char m[10000];
12 unsigned char c[10000];
13 unsigned char m2[10000];
14
main()15 int main()
16 {
17 int mlen;
18 int i;
19 int caught;
20
21 for (mlen = 0;mlen < 1000 && mlen + crypto_box_ZEROBYTES < sizeof m;++mlen) {
22 crypto_box_keypair(alicepk,alicesk);
23 crypto_box_keypair(bobpk,bobsk);
24 randombytes(n,crypto_box_NONCEBYTES);
25 randombytes(m + crypto_box_ZEROBYTES,mlen);
26 crypto_box(c,m,mlen + crypto_box_ZEROBYTES,n,bobpk,alicesk);
27 caught = 0;
28 while (caught < 10) {
29 c[random() % (mlen + crypto_box_ZEROBYTES)] = random();
30 if (crypto_box_open(m2,c,mlen + crypto_box_ZEROBYTES,n,alicepk,bobsk) == 0) {
31 for (i = 0;i < mlen + crypto_box_ZEROBYTES;++i)
32 if (m2[i] != m[i]) {
33 printf("forgery\n");
34 return 100;
35 }
36 } else {
37 ++caught;
38 }
39 }
40 }
41 return 0;
42 }
43