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/**
* Policies Source File
* (C) 2004-2006 Jack Lloyd
*
* Released under the terms of the Botan license
*/
#include <botan/tls_policy.h>
#include <botan/tls_exceptn.h>
namespace Botan {
/**
* Return allowed ciphersuites
*/
std::vector<u16bit> Policy::ciphersuites() const
{
return suite_list(allow_static_rsa(), allow_edh_rsa(), allow_edh_dsa());
}
/**
* Return allowed ciphersuites
*/
std::vector<u16bit> Policy::suite_list(bool use_rsa, bool use_edh_rsa,
bool use_edh_dsa) const
{
std::vector<u16bit> suites;
if(use_edh_dsa)
{
suites.push_back(DHE_DSS_AES256_SHA);
suites.push_back(DHE_DSS_AES128_SHA);
suites.push_back(DHE_DSS_3DES_SHA);
}
if(use_edh_rsa)
{
suites.push_back(DHE_RSA_AES256_SHA);
suites.push_back(DHE_RSA_AES128_SHA);
suites.push_back(DHE_RSA_3DES_SHA);
}
if(use_rsa)
{
suites.push_back(RSA_AES256_SHA);
suites.push_back(RSA_AES128_SHA);
suites.push_back(RSA_3DES_SHA);
suites.push_back(RSA_RC4_SHA);
suites.push_back(RSA_RC4_MD5);
}
if(suites.size() == 0)
throw TLS_Exception(INTERNAL_ERROR,
"Policy error: All ciphersuites disabled");
return suites;
}
/**
* Return allowed compression algorithms
*/
std::vector<byte> Policy::compression() const
{
std::vector<byte> algs;
algs.push_back(NO_COMPRESSION);
return algs;
}
/**
* Choose which ciphersuite to use
*/
u16bit Policy::choose_suite(const std::vector<u16bit>& c_suites,
bool have_rsa, bool have_dsa) const
{
bool use_static_rsa = allow_static_rsa() && have_rsa;
bool use_edh_rsa = allow_edh_rsa() && have_rsa;
bool use_edh_dsa = allow_edh_dsa() && have_dsa;
std::vector<u16bit> s_suites = suite_list(use_static_rsa, use_edh_rsa,
use_edh_dsa);
for(u32bit j = 0; j != s_suites.size(); j++)
for(u32bit k = 0; k != c_suites.size(); k++)
if(s_suites[j] == c_suites[k])
return s_suites[j];
return 0;
}
/**
* Choose which compression algorithm to use
*/
byte Policy::choose_compression(const std::vector<byte>& c_comp) const
{
std::vector<byte> s_comp = compression();
for(u32bit j = 0; j != s_comp.size(); j++)
for(u32bit k = 0; k != c_comp.size(); k++)
if(s_comp[j] == c_comp[k])
return s_comp[j];
return NO_COMPRESSION;
}
/**
* Return the minimum acceptable SSL/TLS version
*/
Version_Code Policy::min_version() const
{
return SSL_V3;
}
/**
* Return the preferable SSL/TLS version
*/
Version_Code Policy::pref_version() const
{
return TLS_V10;
}
/**
* Check if static RSA keying is allowed
*/
bool Policy::allow_static_rsa() const
{
return true;
}
/**
* Check if RSA with empheral DH is allowed
*/
bool Policy::allow_edh_rsa() const
{
return true;
}
/**
* Check if DSA with empheral DH is allowed
*/
bool Policy::allow_edh_dsa() const
{
return true;
}
/**
* Check if client authentication is required
*/
bool Policy::require_client_auth() const
{
return false;
}
/**
* Return the group to use for empheral DH
*/
DL_Group Policy::dh_group() const
{
return DL_Group("IETF-1024");
}
/**
* Return the size to use for an empheral RSA key
*/
u32bit Policy::rsa_export_keysize() const
{
return 512;
}
/**
* Default certificate check
*/
bool Policy::check_cert(const std::vector<X509_Certificate>&,
const std::string&) const
{
return true;
}
}
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