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#include "crypto_onetimeauth_poly1305.h"
#include "crypto_secretbox_xsalsa20poly1305.h"
#include "crypto_stream_xsalsa20.h"
#include "randombytes.h"
int
crypto_secretbox_xsalsa20poly1305(unsigned char *c, const unsigned char *m,
unsigned long long mlen,
const unsigned char *n,
const unsigned char *k)
{
int i;
if (mlen < 32) {
return -1;
}
crypto_stream_xsalsa20_xor(c, m, mlen, n, k);
crypto_onetimeauth_poly1305(c + 16, c + 32, mlen - 32, c);
for (i = 0; i < 16; ++i) {
c[i] = 0;
}
return 0;
}
int
crypto_secretbox_xsalsa20poly1305_open(unsigned char *m, const unsigned char *c,
unsigned long long clen,
const unsigned char *n,
const unsigned char *k)
{
unsigned char subkey[32];
int i;
if (clen < 32) {
return -1;
}
crypto_stream_xsalsa20(subkey, 32, n, k);
if (crypto_onetimeauth_poly1305_verify(c + 16, c + 32,
clen - 32, subkey) != 0) {
return -1;
}
crypto_stream_xsalsa20_xor(m, c, clen, n, k);
for (i = 0; i < 32; ++i) {
m[i] = 0;
}
return 0;
}
size_t
crypto_secretbox_xsalsa20poly1305_keybytes(void)
{
return crypto_secretbox_xsalsa20poly1305_KEYBYTES;
}
size_t
crypto_secretbox_xsalsa20poly1305_noncebytes(void)
{
return crypto_secretbox_xsalsa20poly1305_NONCEBYTES;
}
size_t
crypto_secretbox_xsalsa20poly1305_zerobytes(void)
{
return crypto_secretbox_xsalsa20poly1305_ZEROBYTES;
}
size_t
crypto_secretbox_xsalsa20poly1305_boxzerobytes(void)
{
return crypto_secretbox_xsalsa20poly1305_BOXZEROBYTES;
}
size_t
crypto_secretbox_xsalsa20poly1305_macbytes(void)
{
return crypto_secretbox_xsalsa20poly1305_MACBYTES;
}
size_t
crypto_secretbox_xsalsa20poly1305_messagebytes_max(void)
{
return crypto_secretbox_xsalsa20poly1305_MESSAGEBYTES_MAX;
}
void
crypto_secretbox_xsalsa20poly1305_keygen(unsigned char k[crypto_secretbox_xsalsa20poly1305_KEYBYTES])
{
randombytes_buf(k, crypto_secretbox_xsalsa20poly1305_KEYBYTES);
}
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