Sha256: 11d5bdfae5c8a79427cfd3729ed33ed5ba302e0d94178f412e1877cee1601e5b
Contents?: true
Size: 1.09 KB
Versions: 8
Compression:
Stored size: 1.09 KB
Contents
/*
version 20140420
D. J. Bernstein
Public domain.
*/
#include "api.h"
#include "crypto_core_salsa20.h"
#include "utils.h"
#ifndef HAVE_AMD64_ASM
typedef unsigned int uint32;
static const unsigned char sigma[16] = {
'e', 'x', 'p', 'a', 'n', 'd', ' ', '3', '2', '-', 'b', 'y', 't', 'e', ' ', 'k'
};
int crypto_stream(
unsigned char *c,unsigned long long clen,
const unsigned char *n,
const unsigned char *k
)
{
unsigned char in[16];
unsigned char block[64];
unsigned char kcopy[32];
unsigned long long i;
unsigned int u;
if (!clen) return 0;
for (i = 0;i < 32;++i) kcopy[i] = k[i];
for (i = 0;i < 8;++i) in[i] = n[i];
for (i = 8;i < 16;++i) in[i] = 0;
while (clen >= 64) {
crypto_core_salsa20(c,in,kcopy,sigma);
u = 1;
for (i = 8;i < 16;++i) {
u += (unsigned int) in[i];
in[i] = u;
u >>= 8;
}
clen -= 64;
c += 64;
}
if (clen) {
crypto_core_salsa20(block,in,kcopy,sigma);
for (i = 0;i < clen;++i) c[i] = block[i];
}
sodium_memzero(block, sizeof block);
sodium_memzero(kcopy, sizeof kcopy);
return 0;
}
#endif
Version data entries
8 entries across 8 versions & 1 rubygems