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/*
* Boost.Python module definition
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/rsa.h>
#include <botan/look_pk.h>
#include <botan/pubkey.h>
#include <botan/x509_key.h>
using namespace Botan;
#include "python_botan.h"
#include <sstream>
std::string bigint2str(const BigInt& n)
{
std::ostringstream out;
out << n;
return out.str();
}
std::string secvec2str(const MemoryRegion<byte>& vec)
{
std::string str(vec.size(), 0);
memcpy(&str[0], vec.begin(), vec.size());
return str;
}
class Py_RSA_PrivateKey
{
public:
Py_RSA_PrivateKey(std::string pem_str,
Python_RandomNumberGenerator& rng,
std::string pass);
Py_RSA_PrivateKey(u32bit bits, Python_RandomNumberGenerator& rng);
~Py_RSA_PrivateKey() { delete rsa_key; }
std::string to_string() const
{
return PKCS8::PEM_encode(*rsa_key);
}
std::string get_N() const { return bigint2str(get_bigint_N()); }
std::string get_E() const { return bigint2str(get_bigint_E()); }
const BigInt& get_bigint_N() const { return rsa_key->get_n(); }
const BigInt& get_bigint_E() const { return rsa_key->get_e(); }
std::string decrypt(const std::string& in,
const std::string& padding);
std::string sign(const std::string& in,
const std::string& padding,
Python_RandomNumberGenerator& rng);
private:
RSA_PrivateKey* rsa_key;
};
std::string Py_RSA_PrivateKey::decrypt(const std::string& in,
const std::string& padding)
{
std::auto_ptr<PK_Decryptor> enc(get_pk_decryptor(*rsa_key, padding));
const byte* in_bytes = reinterpret_cast<const byte*>(in.data());
return secvec2str(enc->decrypt(in_bytes, in.size()));
}
std::string Py_RSA_PrivateKey::sign(const std::string& in,
const std::string& padding,
Python_RandomNumberGenerator& rng)
{
std::auto_ptr<PK_Signer> sign(get_pk_signer(*rsa_key, padding));
const byte* in_bytes = reinterpret_cast<const byte*>(in.data());
sign->update(in_bytes, in.size());
return secvec2str(sign->signature(rng.get_underlying_rng()));
}
Py_RSA_PrivateKey::Py_RSA_PrivateKey(u32bit bits,
Python_RandomNumberGenerator& rng)
{
rsa_key = new RSA_PrivateKey(rng.get_underlying_rng(), bits);
}
Py_RSA_PrivateKey::Py_RSA_PrivateKey(std::string pem_str,
Python_RandomNumberGenerator& rng,
std::string passphrase)
{
DataSource_Memory in(pem_str);
Private_Key* pkcs8_key =
PKCS8::load_key(in,
rng.get_underlying_rng(),
passphrase);
rsa_key = dynamic_cast<RSA_PrivateKey*>(pkcs8_key);
if(!rsa_key)
throw std::invalid_argument("Key is not an RSA key");
}
class Py_RSA_PublicKey
{
public:
Py_RSA_PublicKey(std::string pem_str);
Py_RSA_PublicKey(const Py_RSA_PrivateKey&);
~Py_RSA_PublicKey() { delete rsa_key; }
std::string get_N() const { return bigint2str(get_bigint_N()); }
std::string get_E() const { return bigint2str(get_bigint_E()); }
const BigInt& get_bigint_N() const { return rsa_key->get_n(); }
const BigInt& get_bigint_E() const { return rsa_key->get_e(); }
std::string to_string() const
{
return X509::PEM_encode(*rsa_key);
}
std::string encrypt(const std::string& in,
const std::string& padding,
Python_RandomNumberGenerator& rng);
bool verify(const std::string& in,
const std::string& padding,
const std::string& signature);
private:
RSA_PublicKey* rsa_key;
};
Py_RSA_PublicKey::Py_RSA_PublicKey(const Py_RSA_PrivateKey& priv)
{
rsa_key = new RSA_PublicKey(priv.get_bigint_N(), priv.get_bigint_E());
}
Py_RSA_PublicKey::Py_RSA_PublicKey(std::string pem_str)
{
DataSource_Memory in(pem_str);
Public_Key* x509_key = X509::load_key(in);
rsa_key = dynamic_cast<RSA_PublicKey*>(x509_key);
if(!rsa_key)
throw std::invalid_argument("Key is not an RSA key");
}
std::string Py_RSA_PublicKey::encrypt(const std::string& in,
const std::string& padding,
Python_RandomNumberGenerator& rng)
{
std::auto_ptr<PK_Encryptor> enc(get_pk_encryptor(*rsa_key, padding));
const byte* in_bytes = reinterpret_cast<const byte*>(in.data());
return secvec2str(enc->encrypt(in_bytes, in.size(),
rng.get_underlying_rng()));
}
bool Py_RSA_PublicKey::verify(const std::string& in,
const std::string& signature,
const std::string& padding)
{
std::auto_ptr<PK_Verifier> ver(get_pk_verifier(*rsa_key, padding));
const byte* in_bytes = reinterpret_cast<const byte*>(in.data());
const byte* sig_bytes = reinterpret_cast<const byte*>(signature.data());
ver->update(in_bytes, in.size());
return ver->check_signature(sig_bytes, signature.size());
}
void export_rsa()
{
python::class_<Py_RSA_PublicKey>
("RSA_PublicKey", python::init<std::string>())
.def(python::init<const Py_RSA_PrivateKey&>())
.def("to_string", &Py_RSA_PublicKey::to_string)
.def("encrypt", &Py_RSA_PublicKey::encrypt)
.def("verify", &Py_RSA_PublicKey::verify)
.def("get_N", &Py_RSA_PublicKey::get_N)
.def("get_E", &Py_RSA_PublicKey::get_E);
python::class_<Py_RSA_PrivateKey>
("RSA_PrivateKey", python::init<std::string, Python_RandomNumberGenerator&, std::string>())
.def(python::init<u32bit, Python_RandomNumberGenerator&>())
.def("to_string", &Py_RSA_PrivateKey::to_string)
.def("decrypt", &Py_RSA_PrivateKey::decrypt)
.def("sign", &Py_RSA_PrivateKey::sign)
.def("get_N", &Py_RSA_PrivateKey::get_N)
.def("get_E", &Py_RSA_PrivateKey::get_E);
}
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