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#include <string>
using std::string;
#include <stdio.h>
#include <stdlib.h>
#include "crypto_auth_hmacsha512256.h"
#include "randombytes.h"
main()
{
int clen;
int i;
for (clen = 0;clen < 10000;++clen) {
unsigned char key_bytes[32];
randombytes(key_bytes,sizeof key_bytes);
string key((char *) key_bytes,sizeof key_bytes);
unsigned char c_bytes[clen];
randombytes(c_bytes,sizeof c_bytes);
string c((char *) c_bytes,sizeof c_bytes);
string a = crypto_auth_hmacsha512256(c,key);
try {
crypto_auth_hmacsha512256_verify(a,c,key);
} catch(const char *s) {
printf("fail %d %s\n",clen,s);
return 100;
}
if (clen > 0) {
size_t pos = random() % clen;
c.replace(pos,1,1,c[pos] + 1 + (random() % 255));
try {
crypto_auth_hmacsha512256_verify(a,c,key);
printf("forgery %d\n",clen);
} catch(const char *s) {
;
}
pos = random() % a.size();
a.replace(pos,1,1,a[pos] + 1 + (random() % 255));
try {
crypto_auth_hmacsha512256_verify(a,c,key);
printf("forgery %d\n",clen);
} catch(const char *s) {
;
}
}
}
return 0;
}
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