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#include "crypto_box.h"
#include "crypto_secretbox.h"
#include "utils.h"
int
crypto_box_detached(unsigned char *c, unsigned char *mac,
const unsigned char *m, unsigned long long mlen,
const unsigned char *n, const unsigned char *pk,
const unsigned char *sk)
{
unsigned char k[crypto_box_BEFORENMBYTES];
int ret;
(void) sizeof(int[crypto_box_BEFORENMBYTES >=
crypto_secretbox_KEYBYTES ? 1 : -1]);
crypto_box_beforenm(k, pk, sk);
ret = crypto_secretbox_detached(c, mac, m, mlen, n, k);
sodium_memzero(k, sizeof k);
return ret;
}
int
crypto_box_easy(unsigned char *c, const unsigned char *m,
unsigned long long mlen, const unsigned char *n,
const unsigned char *pk, const unsigned char *sk)
{
return crypto_box_detached(c + crypto_box_MACBYTES, c, m, mlen, n,
pk, sk);
}
int
crypto_box_open_detached(unsigned char *m, const unsigned char *c,
const unsigned char *mac,
unsigned long long clen, const unsigned char *n,
const unsigned char *pk, const unsigned char *sk)
{
unsigned char k[crypto_box_BEFORENMBYTES];
int ret;
crypto_box_beforenm(k, pk, sk);
ret = crypto_secretbox_open_detached(m, c, mac, clen, n, k);
sodium_memzero(k, sizeof k);
return ret;
}
int
crypto_box_open_easy(unsigned char *m, const unsigned char *c,
unsigned long long clen, const unsigned char *n,
const unsigned char *pk, const unsigned char *sk)
{
if (clen < crypto_box_MACBYTES) {
return -1;
}
return crypto_box_open_detached(m, c + crypto_box_MACBYTES, c,
clen - crypto_box_MACBYTES,
n, pk, sk);
}
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