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/*************************************************
* PBE Retrieval Source File *
* (C) 1999-2007 Jack Lloyd *
*************************************************/
#include <botan/oids.h>
#include <botan/lookup.h>
#include <botan/pbe_pkcs.h>
#include <botan/parsing.h>
#include <botan/libstate.h>
namespace Botan {
/*************************************************
* Get an encryption PBE, set new parameters *
*************************************************/
PBE* get_pbe(const std::string& pbe_name)
{
std::vector<std::string> algo_name;
algo_name = parse_algorithm_name(pbe_name);
if(algo_name.size() != 3)
throw Invalid_Algorithm_Name(pbe_name);
const std::string pbe = algo_name[0];
const std::string digest = algo_name[1];
const std::string cipher = algo_name[2];
PBE* pbe_obj = 0;
if(pbe == "PBE-PKCS5v15")
pbe_obj = new PBE_PKCS5v15(digest, cipher, ENCRYPTION);
else if(pbe == "PBE-PKCS5v20")
pbe_obj = new PBE_PKCS5v20(digest, cipher);
if(!pbe_obj)
throw Algorithm_Not_Found(pbe_name);
pbe_obj->new_params(global_state().prng_reference());
return pbe_obj;
}
/*************************************************
* Get a decryption PBE, decode parameters *
*************************************************/
PBE* get_pbe(const OID& pbe_oid, DataSource& params)
{
std::vector<std::string> algo_name;
algo_name = parse_algorithm_name(OIDS::lookup(pbe_oid));
if(algo_name.size() < 1)
throw Invalid_Algorithm_Name(pbe_oid.as_string());
const std::string pbe_algo = algo_name[0];
if(pbe_algo == "PBE-PKCS5v15")
{
if(algo_name.size() != 3)
throw Invalid_Algorithm_Name(pbe_oid.as_string());
const std::string digest = algo_name[1];
const std::string cipher = algo_name[2];
PBE* pbe = new PBE_PKCS5v15(digest, cipher, DECRYPTION);
pbe->decode_params(params);
return pbe;
}
else if(pbe_algo == "PBE-PKCS5v20")
return new PBE_PKCS5v20(params);
throw Algorithm_Not_Found(pbe_oid.as_string());
}
}
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