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/*
* (C) 2018 Ribose Inc
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/pbkdf.h>
#include <botan/exceptn.h>
#include <botan/scan_name.h>
#if defined(BOTAN_HAS_PBKDF2)
#include <botan/pbkdf2.h>
#endif
#if defined(BOTAN_HAS_PGP_S2K)
#include <botan/pgp_s2k.h>
#endif
#if defined(BOTAN_HAS_SCRYPT)
#include <botan/scrypt.h>
#endif
namespace Botan {
std::unique_ptr<PasswordHashFamily> PasswordHashFamily::create(const std::string& algo_spec,
const std::string& provider)
{
const SCAN_Name req(algo_spec);
#if defined(BOTAN_HAS_PBKDF2)
if(req.algo_name() == "PBKDF2")
{
// TODO OpenSSL
if(provider.empty() || provider == "base")
{
if(auto mac = MessageAuthenticationCode::create(req.arg(0)))
return std::unique_ptr<PasswordHashFamily>(new PBKDF2_Family(mac.release()));
if(auto mac = MessageAuthenticationCode::create("HMAC(" + req.arg(0) + ")"))
return std::unique_ptr<PasswordHashFamily>(new PBKDF2_Family(mac.release()));
}
return nullptr;
}
#endif
#if defined(BOTAN_HAS_SCRYPT)
if(req.algo_name() == "Scrypt")
{
return std::unique_ptr<PasswordHashFamily>(new Scrypt_Family);
}
#endif
#if defined(BOTAN_HAS_PGP_S2K)
if(req.algo_name() == "OpenPGP-S2K" && req.arg_count() == 1)
{
if(auto hash = HashFunction::create(req.arg(0)))
{
return std::unique_ptr<PasswordHashFamily>(new RFC4880_S2K_Family(hash.release()));
}
}
#endif
BOTAN_UNUSED(req);
BOTAN_UNUSED(provider);
return nullptr;
}
//static
std::unique_ptr<PasswordHashFamily>
PasswordHashFamily::create_or_throw(const std::string& algo,
const std::string& provider)
{
if(auto pbkdf = PasswordHashFamily::create(algo, provider))
{
return pbkdf;
}
throw Lookup_Error("PasswordHashFamily", algo, provider);
}
std::vector<std::string> PasswordHashFamily::providers(const std::string& algo_spec)
{
return probe_providers_of<PasswordHashFamily>(algo_spec, { "base", "openssl" });
}
}
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