release/src/router/dnscrypt/src/libnacl/crypto_stream/xsalsa20/ref/xor.c

   1 /*
   2 version 20080913
   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.h"
  10
  11 static const unsigned char sigma[16] = "expand 32-byte k";
  12
  13 int crypto_stream_xor(
  14         unsigned char *c,
  15   const unsigned char *m,unsigned long long mlen,
  16   const unsigned char *n,
  17   const unsigned char *k
  18 )
  19 {
  20   unsigned char subkey[32];
  21   crypto_core_hsalsa20(subkey,n,k,sigma);
  22   return crypto_stream_salsa20_xor(c,m,mlen,n + 16,subkey);
  23 }