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/*
* (C) 1999-2008 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/internal/enc_padding.h>
#include <botan/exceptn.h>
#include <botan/internal/parsing.h>
#include <botan/internal/scan_name.h>
#if defined(BOTAN_HAS_EME_OAEP)
#include <botan/internal/oaep.h>
#endif
#if defined(BOTAN_HAS_EME_PKCS1)
#include <botan/internal/eme_pkcs.h>
#endif
#if defined(BOTAN_HAS_EME_RAW)
#include <botan/internal/eme_raw.h>
#endif
namespace Botan {
std::unique_ptr<EncryptionPaddingScheme> EncryptionPaddingScheme::create(std::string_view algo_spec) {
#if defined(BOTAN_HAS_EME_RAW)
if(algo_spec == "Raw") {
return std::make_unique<EME_Raw>();
}
#endif
#if defined(BOTAN_HAS_EME_PKCS1)
// TODO(Botan4) Remove all but "PKCS1v15"
if(algo_spec == "PKCS1v15" || algo_spec == "EME-PKCS1-v1_5") {
return std::make_unique<EME_PKCS1v15>();
}
#endif
#if defined(BOTAN_HAS_EME_OAEP)
const SCAN_Name req(algo_spec);
// TODO(Botan4) Remove all but "OAEP"
if(req.algo_name() == "OAEP" || req.algo_name() == "EME-OAEP" || req.algo_name() == "EME1") {
if(req.arg_count() == 1 || ((req.arg_count() == 2 || req.arg_count() == 3) && req.arg(1) == "MGF1")) {
if(auto hash = HashFunction::create(req.arg(0))) {
return std::make_unique<OAEP>(std::move(hash), req.arg(2, ""));
}
} else if(req.arg_count() == 2 || req.arg_count() == 3) {
auto mgf_params = parse_algorithm_name(req.arg(1));
if(mgf_params.size() == 2 && mgf_params[0] == "MGF1") {
auto hash = HashFunction::create(req.arg(0));
auto mgf1_hash = HashFunction::create(mgf_params[1]);
if(hash && mgf1_hash) {
return std::make_unique<OAEP>(std::move(hash), std::move(mgf1_hash), req.arg(2, ""));
}
}
}
}
#endif
throw Algorithm_Not_Found(algo_spec);
}
EncryptionPaddingScheme::~EncryptionPaddingScheme() = default;
} // namespace Botan