release/src/router/libsodium/src/libsodium/crypto_stream/xsalsa20/ref/stream_xsalsa20.c

   1 /*
   2 version 20080914
   3 D. J. Bernstein
   4 Public domain.
   5 */
   6
   7 #include "crypto_core_hsalsa20.h"
   8 #include "crypto_stream_salsa20.h"
   9 #include "crypto_stream_xsalsa20.h"
  10 #include "utils.h"
  11
  12 int crypto_stream_xsalsa20(
  13         unsigned char *c,unsigned long long clen,
  14   const unsigned char *n,
  15   const unsigned char *k
  16 )
  17 {
  18   unsigned char subkey[32];
  19   int ret;
  20   crypto_core_hsalsa20(subkey,n,k,NULL);
  21   ret = crypto_stream_salsa20(c,clen,n + 16,subkey);
  22   sodium_memzero(subkey, sizeof subkey);
  23   return ret;
  24 }