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#include <string.h>
#include "crypto_stream_salsa20.h"
#include "crypto_rng.h"
#define crypto_stream crypto_stream_salsa20
#define KEYBYTES crypto_stream_salsa20_KEYBYTES
#define NONCEBYTES crypto_stream_salsa20_NONCEBYTES
#define OUTPUTBYTES crypto_rng_OUTPUTBYTES
#if KEYBYTES != crypto_rng_KEYBYTES
KEYBYTES mismatch!
#endif
static const unsigned char nonce[NONCEBYTES] = {0};
int crypto_rng(
unsigned char *r, /* random output */
unsigned char *n, /* new key */
const unsigned char *g /* old key */
)
{
unsigned char x[KEYBYTES + OUTPUTBYTES];
crypto_stream(x,sizeof x,nonce,g);
memcpy(n,x,KEYBYTES);
memcpy(r,x + KEYBYTES,OUTPUTBYTES);
return 0;
}
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