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/*
* PBKDF
* (C) 2012 Jack Lloyd
*
* 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_PBKDF1)
#include <botan/pbkdf1.h>
#endif
#if defined(BOTAN_HAS_PBKDF2)
#include <botan/pbkdf2.h>
#endif
#if defined(BOTAN_HAS_PGP_S2K)
#include <botan/pgp_s2k.h>
#endif
namespace Botan {
std::unique_ptr<PBKDF> PBKDF::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<PBKDF>(new PKCS5_PBKDF2(mac.release()));
if(auto mac = MessageAuthenticationCode::create("HMAC(" + req.arg(0) + ")"))
return std::unique_ptr<PBKDF>(new PKCS5_PBKDF2(mac.release()));
}
return nullptr;
}
#endif
#if defined(BOTAN_HAS_PBKDF1)
if(req.algo_name() == "PBKDF1" && req.arg_count() == 1)
{
if(auto hash = HashFunction::create(req.arg(0)))
return std::unique_ptr<PBKDF>(new PKCS5_PBKDF1(hash.release()));
}
#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<PBKDF>(new OpenPGP_S2K(hash.release()));
}
#endif
BOTAN_UNUSED(req);
BOTAN_UNUSED(provider);
return nullptr;
}
//static
std::unique_ptr<PBKDF>
PBKDF::create_or_throw(const std::string& algo,
const std::string& provider)
{
if(auto pbkdf = PBKDF::create(algo, provider))
{
return pbkdf;
}
throw Lookup_Error("PBKDF", algo, provider);
}
std::vector<std::string> PBKDF::providers(const std::string& algo_spec)
{
return probe_providers_of<PBKDF>(algo_spec, { "base", "openssl" });
}
void PBKDF::pbkdf_timed(uint8_t out[], size_t out_len,
const std::string& passphrase,
const uint8_t salt[], size_t salt_len,
std::chrono::milliseconds msec,
size_t& iterations) const
{
iterations = pbkdf(out, out_len, passphrase, salt, salt_len, 0, msec);
}
void PBKDF::pbkdf_iterations(uint8_t out[], size_t out_len,
const std::string& passphrase,
const uint8_t salt[], size_t salt_len,
size_t iterations) const
{
if(iterations == 0)
throw Invalid_Argument(name() + ": Invalid iteration count");
const size_t iterations_run = pbkdf(out, out_len, passphrase,
salt, salt_len, iterations,
std::chrono::milliseconds(0));
BOTAN_ASSERT_EQUAL(iterations, iterations_run, "Expected PBKDF iterations");
}
secure_vector<uint8_t> PBKDF::pbkdf_iterations(size_t out_len,
const std::string& passphrase,
const uint8_t salt[], size_t salt_len,
size_t iterations) const
{
secure_vector<uint8_t> out(out_len);
pbkdf_iterations(out.data(), out_len, passphrase, salt, salt_len, iterations);
return out;
}
secure_vector<uint8_t> PBKDF::pbkdf_timed(size_t out_len,
const std::string& passphrase,
const uint8_t salt[], size_t salt_len,
std::chrono::milliseconds msec,
size_t& iterations) const
{
secure_vector<uint8_t> out(out_len);
pbkdf_timed(out.data(), out_len, passphrase, salt, salt_len, msec, iterations);
return out;
}
}
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