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/*
* X.509 Public Key
* (C) 1999-2010 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/

#ifndef BOTAN_X509_PUBLIC_KEY_H__
#define BOTAN_X509_PUBLIC_KEY_H__

#include <botan/pk_keys.h>
#include <botan/alg_id.h>
#include <botan/pipe.h>
#include <string>

namespace Botan {

/**
* The two types of X509 encoding supported by Botan.
*/
enum X509_Encoding { RAW_BER, PEM };

/**
* This namespace contains functions for handling X.509 public keys
*/
namespace X509 {

/**
* BER encode a key
* @param key the public key to encode
* @return BER encoding of this key
*/
BOTAN_DLL std::vector<byte> BER_encode(const Public_Key& key);

/**
* PEM encode a public key into a string.
* @param key the key to encode
* @return PEM encoded key
*/
BOTAN_DLL std::string PEM_encode(const Public_Key& key);

/**
* Create a public key from a data source.
* @param source the source providing the DER or PEM encoded key
* @return new public key object
*/
BOTAN_DLL Public_Key* load_key(DataSource& source);

/**
* Create a public key from a file
* @param filename pathname to the file to load
* @return new public key object
*/
BOTAN_DLL Public_Key* load_key(const std::string& filename);

/**
* Create a public key from a memory region.
* @param enc the memory region containing the DER or PEM encoded key
* @return new public key object
*/
BOTAN_DLL Public_Key* load_key(const std::vector<byte>& enc);

/**
* Copy a key.
* @param key the public key to copy
* @return new public key object
*/
BOTAN_DLL Public_Key* copy_key(const Public_Key& key);

/**
* Encode a key into a pipe.
* @deprecated Use PEM_encode or BER_encode instead
*
* @param key the public key to encode
* @param pipe the pipe to feed the encoded key into
* @param encoding the encoding type to use
*/
BOTAN_DEPRECATED("Use PEM_encode or BER_encode")
inline void encode(const Public_Key& key,
                   Pipe& pipe,
                   X509_Encoding encoding = PEM)
   {
   if(encoding == PEM)
      pipe.write(X509::PEM_encode(key));
   else
      pipe.write(X509::BER_encode(key));
   }

}

}

#endif