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Dir : ~/usr/share/doc/libsodium-devel-1.0.18/

View File Name : secretbox8.c

#define TEST_NAME "secretbox8"
#include "cmptest.h"

static unsigned char k[crypto_secretbox_KEYBYTES];
static unsigned char n[crypto_secretbox_NONCEBYTES];
static unsigned char m[10000];
static unsigned char c[10000];
static unsigned char m2[10000];

int
main(void)
{
    size_t mlen;
    size_t i;
    int    caught;

    for (mlen = 0; mlen < 1000 && mlen + crypto_secretbox_ZEROBYTES < sizeof m;
         ++mlen) {
        crypto_secretbox_keygen(k);
        randombytes_buf(n, crypto_secretbox_NONCEBYTES);
        randombytes_buf(m + crypto_secretbox_ZEROBYTES, mlen);
        crypto_secretbox(c, m, mlen + crypto_secretbox_ZEROBYTES, n, k);
        caught = 0;
        while (caught < 10) {
            c[rand() % (mlen + crypto_secretbox_ZEROBYTES)] = rand();
            if (crypto_secretbox_open(m2, c, mlen + crypto_secretbox_ZEROBYTES,
                                      n, k) == 0) {
                for (i = 0; i < mlen + crypto_secretbox_ZEROBYTES; ++i) {
                    if (m2[i] != m[i]) {
                        printf("forgery\n");
                        return 100;
                    }
                }
            } else {
                ++caught;
            }
        }
    }
    return 0;
}