release/src/router/dnscrypt/src/libnacl/crypto_sign/wrapper-sign-open.cpp

   1 #include <string>
   2 using std::string;
   3 #include "crypto_sign.h"
   4
   5 string crypto_sign_open(const string &sm_string, const string &pk_string)
   6 {
   7   if (pk_string.size() != crypto_sign_PUBLICKEYBYTES) throw "incorrect public-key length";
   8   size_t smlen = sm_string.size();
   9   unsigned char m[smlen];
  10   unsigned long long mlen;
  11   for (int i = 0;i < smlen;++i) m[i] = sm_string[i];
  12   if (crypto_sign_open(
  13         m,
  14         &mlen,
  15         m,
  16         smlen,
  17         (const unsigned char *) pk_string.c_str()
  18         ) != 0)
  19     throw "ciphertext fails verification";
  20   return string(
  21     (char *) m,
  22     mlen
  23   );
  24 }