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/*
* TLS Cipher Suite
* (C) 2004-2010,2012 Jack Lloyd
*
* Released under the terms of the Botan license
*/
#include <botan/tls_ciphersuite.h>
#include <botan/parsing.h>
#include <sstream>
#include <stdexcept>
namespace Botan {
namespace TLS {
namespace {
/*
* This way all work happens at the constuctor call, and we can
* rely on that happening only once in C++11.
*/
std::vector<Ciphersuite> gather_known_ciphersuites()
{
std::vector<Ciphersuite> ciphersuites;
for(size_t i = 0; i != 65536; ++i)
{
Ciphersuite suite = Ciphersuite::by_id(i);
if(!suite.valid())
continue; // not a ciphersuite we know, skip
ciphersuites.push_back(suite);
}
return ciphersuites;
}
}
const std::vector<Ciphersuite>& Ciphersuite::all_known_ciphersuites()
{
static std::vector<Ciphersuite> all_ciphersuites(gather_known_ciphersuites());
return all_ciphersuites;
}
Ciphersuite Ciphersuite::by_name(const std::string& name)
{
for(auto suite : all_known_ciphersuites())
{
if(suite.to_string() == name)
return suite;
}
return Ciphersuite(); // some unknown ciphersuite
}
bool Ciphersuite::psk_ciphersuite() const
{
return (kex_algo() == "PSK" ||
kex_algo() == "DHE_PSK" ||
kex_algo() == "ECDHE_PSK");
}
bool Ciphersuite::ecc_ciphersuite() const
{
return (kex_algo() == "ECDH" || sig_algo() == "ECDSA");
}
std::string Ciphersuite::to_string() const
{
if(m_cipher_keylen == 0)
throw std::runtime_error("Ciphersuite::to_string - no value set");
std::ostringstream out;
out << "TLS_";
if(kex_algo() != "RSA")
{
if(kex_algo() == "DH")
out << "DHE";
else if(kex_algo() == "ECDH")
out << "ECDHE";
else
out << kex_algo();
out << '_';
}
if(sig_algo() == "DSA")
out << "DSS_";
else if(sig_algo() != "")
out << sig_algo() << '_';
out << "WITH_";
if(cipher_algo() == "ARC4")
{
out << "RC4_128_";
}
else
{
if(cipher_algo() == "3DES")
out << "3DES_EDE";
else if(cipher_algo() == "Camellia-128" || cipher_algo() == "Camellia-256")
out << "CAMELLIA_" << std::to_string(8*cipher_keylen());
else
out << replace_char(cipher_algo(), '-', '_');
out << "_CBC_";
}
if(mac_algo() == "SHA-1")
out << "SHA";
else if(mac_algo() == "SHA-256")
out << "SHA256";
else if(mac_algo() == "SHA-384")
out << "SHA384";
else
out << mac_algo();
return out.str();
}
}
}
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