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#include "diffiehellman.ih"
// save the prime, the generator, the public key, and the private key
void DiffieHellman::save(string const &basename) const
try
{
ofstream out = Exception::factory<ofstream>(basename + ".pub");
out << hex <<
d_prime << '\n' <<
d_generator << '\n' <<
d_pubKey << '\n';
if (not out)
throw ".pub";
int fd = open((basename + ".sec").c_str(), O_CREAT | O_RDWR,
S_IRUSR | S_IWUSR);
if (fd == -1) // can't open the .sec-file
throw ".sec";
OFdStream outSec{ fd, 512 };
outSec << hex << d_privKey << '\n';
}
catch (char const *extension)
{
throw exception() << "could not write " <<
(extension == ".pub"s ? "public" : "private") <<
" DH info to " << basename << extension;
}
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