serval-dna/nacl/nacl-20110221/crypto_stream/xsalsa20/ref/stream.c

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/*
version 20080914
D. J. Bernstein
Public domain.
*/
#include "crypto_core_hsalsa20.h"
#include "crypto_stream_salsa20.h"
#include "crypto_stream.h"
static const unsigned char sigma[16] = "expand 32-byte k";
int crypto_stream(
unsigned char *c,unsigned long long clen,
const unsigned char *n,
const unsigned char *k
)
{
unsigned char subkey[32];
crypto_core_hsalsa20(subkey,n,k,sigma);
return crypto_stream_salsa20(c,clen,n + 16,subkey);
}