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/*************************************************
* Engine Source File *
* (C) 1999-2005 The Botan Project *
*************************************************/
#include <botan/engine.h>
#include <botan/def_eng.h>
#include <botan/init.h>
#include <botan/rng.h>
namespace Botan {
namespace {
std::vector<Engine*> engines;
}
namespace Init {
/*************************************************
* Initialize the list of Engines *
*************************************************/
void startup_engines()
{
engines.push_back(new Default_Engine);
}
/*************************************************
* Delete the list of Engines *
*************************************************/
void shutdown_engines()
{
for(u32bit j = 0; j != engines.size(); j++)
delete engines[j];
engines.clear();
}
}
namespace Engine_Core {
/*************************************************
* Add an Engine to the list *
*************************************************/
void add_engine(Engine* engine)
{
engines.insert(engines.end() - 1, engine);
}
/*************************************************
* 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)
{
for(u32bit j = 0; j != engines.size(); j++)
{
IF_Operation* op = engines[j]->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)
{
for(u32bit j = 0; j != engines.size(); j++)
{
DSA_Operation* op = engines[j]->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)
{
for(u32bit j = 0; j != engines.size(); j++)
{
NR_Operation* op = engines[j]->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)
{
for(u32bit j = 0; j != engines.size(); j++)
{
ELG_Operation* op = engines[j]->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)
{
for(u32bit j = 0; j != engines.size(); j++)
{
DH_Operation* op = engines[j]->dh_op(group, x);
if(op) return op;
}
throw Lookup_Error("Engine_Core::dh_op: Unable to find a working engine");
}
}
/*************************************************
* Acquire a modular reducer *
*************************************************/
ModularReducer* get_reducer(const BigInt& n, bool convert_ok)
{
for(u32bit j = 0; j != engines.size(); j++)
{
ModularReducer* op = engines[j]->reducer(n, convert_ok);
if(op) return op;
}
throw Lookup_Error("get_reducer: Unable to find a working engine");
}
/*************************************************
* Acquire a block cipher *
*************************************************/
const BlockCipher* retrieve_block_cipher(const std::string& name)
{
for(u32bit j = 0; j != engines.size(); j++)
{
const BlockCipher* algo = engines[j]->block_cipher(name);
if(algo) return algo;
}
return 0;
}
/*************************************************
* Acquire a stream cipher *
*************************************************/
const StreamCipher* retrieve_stream_cipher(const std::string& name)
{
for(u32bit j = 0; j != engines.size(); j++)
{
const StreamCipher* algo = engines[j]->stream_cipher(name);
if(algo) return algo;
}
return 0;
}
/*************************************************
* Acquire a hash function *
*************************************************/
const HashFunction* retrieve_hash(const std::string& name)
{
for(u32bit j = 0; j != engines.size(); j++)
{
const HashFunction* algo = engines[j]->hash(name);
if(algo) return algo;
}
return 0;
}
/*************************************************
* Acquire an authentication code *
*************************************************/
const MessageAuthenticationCode* retrieve_mac(const std::string& name)
{
for(u32bit j = 0; j != engines.size(); j++)
{
const MessageAuthenticationCode* algo = engines[j]->mac(name);
if(algo) return algo;
}
return 0;
}
/*************************************************
* Add a new block cipher *
*************************************************/
void add_algorithm(BlockCipher* algo)
{
for(u32bit j = 0; j != engines.size(); j++)
{
Default_Engine* engine = dynamic_cast<Default_Engine*>(engines[j]);
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(StreamCipher* algo)
{
for(u32bit j = 0; j != engines.size(); j++)
{
Default_Engine* engine = dynamic_cast<Default_Engine*>(engines[j]);
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(HashFunction* algo)
{
for(u32bit j = 0; j != engines.size(); j++)
{
Default_Engine* engine = dynamic_cast<Default_Engine*>(engines[j]);
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(MessageAuthenticationCode* algo)
{
for(u32bit j = 0; j != engines.size(); j++)
{
Default_Engine* engine = dynamic_cast<Default_Engine*>(engines[j]);
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(const std::string& algo_spec, Cipher_Dir direction)
{
for(u32bit j = 0; j != engines.size(); j++)
{
Keyed_Filter* algo = engines[j]->get_cipher(algo_spec, direction);
if(algo) return algo;
}
throw Algorithm_Not_Found(algo_spec);
}
/*************************************************
* Get a cipher object *
*************************************************/
Keyed_Filter* get_cipher(const std::string& algo_spec, const SymmetricKey& key,
const InitializationVector& iv, Cipher_Dir direction)
{
Keyed_Filter* cipher = get_cipher(algo_spec, direction);
cipher->set_key(key);
cipher->set_iv(iv);
return cipher;
}
/*************************************************
* Get a cipher object *
*************************************************/
Keyed_Filter* get_cipher(const std::string& algo_spec, const SymmetricKey& key,
Cipher_Dir direction)
{
return get_cipher(algo_spec, key, InitializationVector(), direction);
}
}
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