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/*************************************************
* EMSA/EME/KDF/MGF Retrieval Source File *
* (C) 1999-2007 Jack Lloyd *
*************************************************/
#include <botan/lookup.h>
#include <botan/libstate.h>
#include <botan/parsing.h>
#include <botan/util.h>
#if defined(BOTAN_HAS_MGF1)
#include <botan/mgf1.h>
#endif
#if defined(BOTAN_HAS_EMSA1)
#include <botan/emsa1.h>
#endif
#if defined(BOTAN_HAS_EMSA2)
#include <botan/emsa2.h>
#endif
#if defined(BOTAN_HAS_EMSA3)
#include <botan/emsa3.h>
#endif
#if defined(BOTAN_HAS_EMSA4)
#include <botan/emsa4.h>
#endif
#if defined(BOTAN_HAS_EMSA_RAW)
#include <botan/emsa_raw.h>
#endif
#if defined(BOTAN_HAS_EME1)
#include <botan/eme1.h>
#endif
#if defined(BOTAN_HAS_EME_PKCS1v15)
#include <botan/eme_pkcs.h>
#endif
#if defined(BOTAN_HAS_KDF1)
#include <botan/kdf1.h>
#endif
#if defined(BOTAN_HAS_KDF2)
#include <botan/kdf2.h>
#endif
#if defined(BOTAN_HAS_X942_PRF)
#include <botan/prf_x942.h>
#endif
#if defined(BOTAN_HAS_SSL_V3_PRF)
#include <botan/prf_ssl3.h>
#endif
#if defined(BOTAN_HAS_TLS_V10_PRF)
#include <botan/prf_tls.h>
#endif
namespace Botan {
/*************************************************
* Get an EMSA by name *
*************************************************/
EMSA* get_emsa(const std::string& algo_spec)
{
std::vector<std::string> name = parse_algorithm_name(algo_spec);
const std::string emsa_name = global_state().deref_alias(name[0]);
#if defined(BOTAN_HAS_EMSA_RAW)
if(emsa_name == "Raw")
{
if(name.size() == 1)
return new EMSA_Raw;
}
#endif
#if defined(BOTAN_HAS_EMSA1)
if(emsa_name == "EMSA1")
{
if(name.size() == 2)
return new EMSA1(get_hash(name[1]));
}
#endif
#if defined(BOTAN_HAS_EMSA2)
if(emsa_name == "EMSA2")
{
if(name.size() == 2)
return new EMSA2(get_hash(name[1]));
}
#endif
#if defined(BOTAN_HAS_EMSA3)
if(emsa_name == "EMSA3")
{
if(name.size() == 2)
return new EMSA3(get_hash(name[1]));
}
#endif
#if defined(BOTAN_HAS_EMSA4)
if(emsa_name == "EMSA4")
{
// EMSA4 is hardcoded to use MGF1
if(name.size() >= 3 && name[2] != "MGF1")
throw Algorithm_Not_Found(algo_spec);
if(name.size() == 2 || name.size() == 3)
return new EMSA4(get_hash(name[1]));
else if(name.size() == 4)
return new EMSA4(get_hash(name[1]), to_u32bit(name[3]));
}
#endif
throw Algorithm_Not_Found(algo_spec);
}
/*************************************************
* Get an EME by name *
*************************************************/
EME* get_eme(const std::string& algo_spec)
{
std::vector<std::string> name = parse_algorithm_name(algo_spec);
const std::string eme_name = global_state().deref_alias(name[0]);
#if defined(BOTAN_HAS_EME_PKCS1v15)
if(eme_name == "PKCS1v15")
{
if(name.size() == 1)
return new EME_PKCS1v15;
}
#endif
#if defined(BOTAN_HAS_EME1)
if(eme_name == "EME1")
{
if(name.size() >= 2)
{
if(name.size() >= 3)
{
// EME1 is hardcoded for MGF1
if(name[2] != "MGF1")
throw Algorithm_Not_Found(algo_spec);
}
return new EME1(get_hash(name[1]));
}
}
#endif
throw Algorithm_Not_Found(algo_spec);
}
/*************************************************
* Get an KDF by name *
*************************************************/
KDF* get_kdf(const std::string& algo_spec)
{
std::vector<std::string> name = parse_algorithm_name(algo_spec);
const std::string kdf_name = global_state().deref_alias(name[0]);
#if defined(BOTAN_HAS_KDF1)
if(kdf_name == "KDF1")
{
if(name.size() == 2)
return new KDF1(get_hash(name[1]));
}
#endif
#if defined(BOTAN_HAS_KDF2)
if(kdf_name == "KDF2")
{
if(name.size() == 2)
return new KDF2(get_hash(name[1]));
}
#endif
#if defined(BOTAN_HAS_X942_PRF)
if(kdf_name == "X9.42-PRF")
{
if(name.size() == 2)
return new X942_PRF(name[1]);
}
#endif
#if defined(BOTAN_HAS_TLS_V10_PRF)
if(kdf_name == "TLS-PRF")
{
if(name.size() == 1)
return new TLS_PRF;
}
#endif
#if defined(BOTAN_HAS_SSL_V3_PRF)
if(kdf_name == "SSL3-PRF")
{
if(name.size() == 1)
return new SSL3_PRF;
}
#endif
throw Algorithm_Not_Found(algo_spec);
}
/*************************************************
* Get a MGF by name *
*************************************************/
MGF* get_mgf(const std::string& algo_spec)
{
std::vector<std::string> name = parse_algorithm_name(algo_spec);
const std::string mgf_name = global_state().deref_alias(name[0]);
#ifdef BOTAN_HAS_MGF1
if(mgf_name == "MGF1")
{
if(name.size() == 2)
return new MGF1(get_hash(name[1]));
}
#endif
throw Algorithm_Not_Found(algo_spec);
}
}
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