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/*************************************************
* Engine Source File *
* (C) 1999-2007 Jack Lloyd *
*************************************************/
#include <botan/engine.h>
#include <botan/libstate.h>
#include <botan/lookup.h>
#include <botan/look_add.h>
#include <botan/eng_def.h>
namespace Botan {
namespace Engine_Core {
/*************************************************
* Acquire an IF op *
*************************************************/
IF_Operation* if_op(const BigInt& e, const BigInt& n, const BigInt& d,
const BigInt& p, const BigInt& q, const BigInt& d1,
const BigInt& d2, const BigInt& c)
{
Library_State::Engine_Iterator i(global_state());
while(const Engine* engine = i.next())
{
IF_Operation* op = engine->if_op(e, n, d, p, q, d1, d2, c);
if(op)
return op;
}
throw Lookup_Error("Engine_Core::if_op: Unable to find a working engine");
}
/*************************************************
* Acquire a DSA op *
*************************************************/
DSA_Operation* dsa_op(const DL_Group& group, const BigInt& y, const BigInt& x)
{
Library_State::Engine_Iterator i(global_state());
while(const Engine* engine = i.next())
{
DSA_Operation* op = engine->dsa_op(group, y, x);
if(op)
return op;
}
throw Lookup_Error("Engine_Core::dsa_op: Unable to find a working engine");
}
/*************************************************
* Acquire a NR op *
*************************************************/
NR_Operation* nr_op(const DL_Group& group, const BigInt& y, const BigInt& x)
{
Library_State::Engine_Iterator i(global_state());
while(const Engine* engine = i.next())
{
NR_Operation* op = engine->nr_op(group, y, x);
if(op)
return op;
}
throw Lookup_Error("Engine_Core::nr_op: Unable to find a working engine");
}
/*************************************************
* Acquire an ElGamal op *
*************************************************/
ELG_Operation* elg_op(const DL_Group& group, const BigInt& y, const BigInt& x)
{
Library_State::Engine_Iterator i(global_state());
while(const Engine* engine = i.next())
{
ELG_Operation* op = engine->elg_op(group, y, x);
if(op)
return op;
}
throw Lookup_Error("Engine_Core::elg_op: Unable to find a working engine");
}
/*************************************************
* Acquire a DH op *
*************************************************/
DH_Operation* dh_op(const DL_Group& group, const BigInt& x)
{
Library_State::Engine_Iterator i(global_state());
while(const Engine* engine = i.next())
{
DH_Operation* op = engine->dh_op(group, x);
if(op)
return op;
}
throw Lookup_Error("Engine_Core::dh_op: Unable to find a working engine");
}
#if defined(BOTAN_HAS_ECDSA)
/*************************************************
* Acquire an ECDSA op *
*************************************************/
ECDSA_Operation* ecdsa_op(const EC_Domain_Params& dom_pars,
const BigInt& priv_key,
const PointGFp& pub_key)
{
Library_State::Engine_Iterator i(global_state());
while(const Engine* engine = i.next())
{
ECDSA_Operation* op = engine->ecdsa_op(dom_pars, priv_key, pub_key);
if(op)
return op;
}
throw Lookup_Error("Engine_Core::ecdsa_op: Unable to find a working engine");
}
/*************************************************
* Acquire a ECKAEG op *
*************************************************/
ECKAEG_Operation* eckaeg_op(const EC_Domain_Params& dom_pars,
const BigInt& priv_key,
const PointGFp& pub_key)
{
Library_State::Engine_Iterator i(global_state());
while(const Engine* engine = i.next())
{
ECKAEG_Operation* op = engine->eckaeg_op(dom_pars, priv_key, pub_key);
if(op)
return op;
}
throw Lookup_Error("Engine_Core::eckaeg_op: Unable to find a working engine");
}
#endif
/*************************************************
* Acquire a modular exponentiator *
*************************************************/
Modular_Exponentiator* mod_exp(const BigInt& n, Power_Mod::Usage_Hints hints)
{
Library_State::Engine_Iterator i(global_state());
while(const Engine* engine = i.next())
{
Modular_Exponentiator* op = engine->mod_exp(n, hints);
if(op)
return op;
}
throw Lookup_Error("Engine_Core::mod_exp: Unable to find a working engine");
}
}
/*************************************************
* Acquire a block cipher *
*************************************************/
const BlockCipher* retrieve_block_cipher(Library_State& libstate,
const std::string& name)
{
Library_State::Engine_Iterator i(libstate);
while(const Engine* engine = i.next())
{
const BlockCipher* algo = engine->block_cipher(name);
if(algo)
return algo;
}
return 0;
}
/*************************************************
* Acquire a stream cipher *
*************************************************/
const StreamCipher* retrieve_stream_cipher(Library_State& libstate,
const std::string& name)
{
Library_State::Engine_Iterator i(libstate);
while(const Engine* engine = i.next())
{
const StreamCipher* algo = engine->stream_cipher(name);
if(algo)
return algo;
}
return 0;
}
/*************************************************
* Acquire a hash function *
*************************************************/
const HashFunction* retrieve_hash(Library_State& libstate,
const std::string& name)
{
Library_State::Engine_Iterator i(libstate);
while(const Engine* engine = i.next())
{
const HashFunction* algo = engine->hash(name);
if(algo)
return algo;
}
return 0;
}
/*************************************************
* Acquire an authentication code *
*************************************************/
const MessageAuthenticationCode* retrieve_mac(Library_State& libstate,
const std::string& name)
{
Library_State::Engine_Iterator i(libstate);
while(const Engine* engine = i.next())
{
const MessageAuthenticationCode* algo = engine->mac(name);
if(algo)
return algo;
}
return 0;
}
/*************************************************
* Acquire a string-to-key algorithm *
*************************************************/
const S2K* retrieve_s2k(Library_State& libstate,
const std::string& name)
{
Library_State::Engine_Iterator i(libstate);
while(const Engine* engine = i.next())
{
const S2K* algo = engine->s2k(name);
if(algo)
return algo;
}
return 0;
}
/*************************************************
* Retrieve a block cipher padding method *
*************************************************/
const BlockCipherModePaddingMethod* retrieve_bc_pad(Library_State& libstate,
const std::string& name)
{
Library_State::Engine_Iterator i(libstate);
while(const Engine* engine = i.next())
{
const BlockCipherModePaddingMethod* algo = engine->bc_pad(name);
if(algo)
return algo;
}
return 0;
}
/*************************************************
* Add a new block cipher *
*************************************************/
void add_algorithm(Library_State& libstate, BlockCipher* algo)
{
Library_State::Engine_Iterator i(libstate);
while(Engine* engine_base = i.next())
{
Default_Engine* engine = dynamic_cast<Default_Engine*>(engine_base);
if(engine)
{
engine->add_algorithm(algo);
return;
}
}
throw Invalid_State("add_algorithm: Couldn't find the Default_Engine");
}
/*************************************************
* Add a new stream cipher *
*************************************************/
void add_algorithm(Library_State& libstate, StreamCipher* algo)
{
Library_State::Engine_Iterator i(libstate);
while(Engine* engine_base = i.next())
{
Default_Engine* engine = dynamic_cast<Default_Engine*>(engine_base);
if(engine)
{
engine->add_algorithm(algo);
return;
}
}
throw Invalid_State("add_algorithm: Couldn't find the Default_Engine");
}
/*************************************************
* Add a new hash function *
*************************************************/
void add_algorithm(Library_State& libstate, HashFunction* algo)
{
Library_State::Engine_Iterator i(libstate);
while(Engine* engine_base = i.next())
{
Default_Engine* engine = dynamic_cast<Default_Engine*>(engine_base);
if(engine)
{
engine->add_algorithm(algo);
return;
}
}
throw Invalid_State("add_algorithm: Couldn't find the Default_Engine");
}
/*************************************************
* Add a new authentication code *
*************************************************/
void add_algorithm(Library_State& libstate,
MessageAuthenticationCode* algo)
{
Library_State::Engine_Iterator i(libstate);
while(Engine* engine_base = i.next())
{
Default_Engine* engine = dynamic_cast<Default_Engine*>(engine_base);
if(engine)
{
engine->add_algorithm(algo);
return;
}
}
throw Invalid_State("add_algorithm: Couldn't find the Default_Engine");
}
/*************************************************
* Add a padding method to the lookup table *
*************************************************/
void add_algorithm(Library_State& libstate,
BlockCipherModePaddingMethod* algo)
{
Library_State::Engine_Iterator i(libstate);
while(Engine* engine_base = i.next())
{
Default_Engine* engine = dynamic_cast<Default_Engine*>(engine_base);
if(engine)
{
engine->add_algorithm(algo);
return;
}
}
throw Invalid_State("add_algorithm: Couldn't find the Default_Engine");
}
/*************************************************
* Get a cipher object *
*************************************************/
Keyed_Filter* get_cipher(Library_State& libstate,
const std::string& algo_spec,
Cipher_Dir direction)
{
Library_State::Engine_Iterator i(libstate);
while(Engine* engine = i.next())
{
Keyed_Filter* algo = engine->get_cipher(algo_spec, direction);
if(algo)
return algo;
}
throw Algorithm_Not_Found(algo_spec);
}
/*************************************************
* Get a cipher object *
*************************************************/
Keyed_Filter* get_cipher(Library_State& libstate,
const std::string& algo_spec,
const SymmetricKey& key,
const InitializationVector& iv,
Cipher_Dir direction)
{
Keyed_Filter* cipher = get_cipher(libstate, algo_spec, direction);
cipher->set_key(key);
if(iv.length())
cipher->set_iv(iv);
return cipher;
}
/*************************************************
* Get a cipher object *
*************************************************/
Keyed_Filter* get_cipher(Library_State& libstate,
const std::string& algo_spec,
const SymmetricKey& key,
Cipher_Dir direction)
{
return get_cipher(libstate, algo_spec,
key, InitializationVector(), direction);
}
}
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