release/src/router/dnscrypt/src/libnacl/crypto_box/curve25519xsalsa20poly1305/ref/before.c

   1 #include "crypto_core_hsalsa20.h"
   2 #include "crypto_scalarmult_curve25519.h"
   3 #include "crypto_box.h"
   4
   5 static const unsigned char sigma[16] = "expand 32-byte k";
   6 static const unsigned char n[16] = {0};
   7
   8 int crypto_box_beforenm(
   9   unsigned char *k,
  10   const unsigned char *pk,
  11   const unsigned char *sk
  12 )
  13 {
  14   unsigned char s[32];
  15   crypto_scalarmult_curve25519(s,sk,pk);
  16   return crypto_core_hsalsa20(k,n,s,sigma);
  17 }