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/*************************************************
* Boost.Python module definition *
* (C) 1999-2007 Jack Lloyd *
*************************************************/
#include <botan/botan.h>
using namespace Botan;
#include "python_botan.h"
class Py_HashFunction : public HashFunction
{
public:
virtual void hash_str(const std::string&) = 0;
virtual std::string final_str() = 0;
void clear() throw() {}
void add_data(const byte input[], u32bit length)
{
hash_str(make_string(input, length));
}
void final_result(byte output[])
{
string2binary(final_str(), output, OUTPUT_LENGTH);
}
Py_HashFunction(u32bit digest_size, u32bit block_size) :
HashFunction(digest_size, block_size) {}
};
class Wrapped_HashFunction : public HashFunction
{
public:
void add_data(const byte in[], u32bit len) { hash->update(in, len); }
void final_result(byte out[]) { hash->final(out); }
void clear() throw() {}
std::string name() const { return hash->name(); }
HashFunction* clone() const { return hash->clone(); }
Wrapped_HashFunction(python::object py_obj, HashFunction* h) :
HashFunction(h->OUTPUT_LENGTH, h->HASH_BLOCK_SIZE),
obj(py_obj), hash(h) {}
private:
python::object obj;
HashFunction* hash;
};
class Py_HashFunction_Wrapper : public Py_HashFunction,
public python::wrapper<Py_HashFunction>
{
public:
HashFunction* clone() const
{
python::object self = get_owner(this);
python::object py_clone = self.attr("__class__")();
HashFunction* hf = python::extract<HashFunction*>(py_clone);
return new Wrapped_HashFunction(py_clone, hf);
}
std::string name() const
{
return this->get_override("name")();
}
void hash_str(const std::string& in)
{
this->get_override("update")(in);
}
std::string final_str()
{
return this->get_override("final")();
}
Py_HashFunction_Wrapper(u32bit digest_size, u32bit block_size) :
Py_HashFunction(digest_size, block_size) {}
};
std::string final_str(HashFunction* hash)
{
SecureVector<byte> digest = hash->final();
return std::string((const char*)digest.begin(), digest.size());
}
void export_hash_functions()
{
void (HashFunction::*update_str)(const std::string&) =
&HashFunction::update;
python::class_<HashFunction, boost::noncopyable>
("HashFunction", python::no_init)
.def("__init__", python::make_constructor(get_hash))
.def_readonly("digest_size", &HashFunction::OUTPUT_LENGTH)
.def("name", &HashFunction::name)
.def("update", update_str)
.def("final", final_str);
python::class_<Py_HashFunction_Wrapper, python::bases<HashFunction>,
boost::noncopyable>
("HashFunctionImpl", python::init<u32bit, u32bit>())
.def("name", python::pure_virtual(&Py_HashFunction::name))
.def("update", python::pure_virtual(&Py_HashFunction::hash_str))
.def("final", python::pure_virtual(&Py_HashFunction::final_str));
}
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