pk_filts.cpp

含有多种公开密钥算法、多种块加密、多种数据流加密、多种HASH函数、多种CheckSum校验、多种MAC校验等几十种加密算法的程序

/*************************************************
* PK Filters Source File                         *
* (C) 1999-2002 The Botan Project                *
*************************************************/

#include <botan/pk_filts.h>

namespace Botan {

/*************************************************
* Append to the buffer                           *
*************************************************/
void PK_Encryptor_Filter::write(const byte input[], u32bit length)
   {
   buffer.append(input, length);
   }

/*************************************************
* Encrypt the message                            *
*************************************************/
void PK_Encryptor_Filter::end_msg()
   {
   SecureVector<byte> encrypted = cipher->encrypt(buffer, buffer.size());
   send(encrypted, encrypted.size());
   buffer.destroy();
   }

/*************************************************
* Append to the buffer                           *
*************************************************/
void PK_Decryptor_Filter::write(const byte input[], u32bit length)
   {
   buffer.append(input, length);
   }

/*************************************************
* Decrypt the message                            *
*************************************************/
void PK_Decryptor_Filter::end_msg()
   {
   SecureVector<byte> decrypted = cipher->decrypt(buffer, buffer.size());
   send(decrypted, decrypted.size());
   buffer.destroy();
   }

/*************************************************
* Add more data                                  *
*************************************************/
void PK_Signer_Filter::write(const byte input[], u32bit length)
   {
   signer->update(input, length);
   }

/*************************************************
* Sign the message                               *
*************************************************/
void PK_Signer_Filter::end_msg()
   {
   SecureVector<byte> signature = signer->signature();
   send(signature, signature.size());
   }

/*************************************************
* Add more data                                  *
*************************************************/
void PK_Verifier_Filter::write(const byte input[], u32bit length)
   {
   verifier->update(input, length);
   }

/*************************************************
* Verify the message                             *
*************************************************/
void PK_Verifier_Filter::end_msg()
   {
   if(signature.size() == 0)
      throw Exception("PK_Verifier_Filter: No signature to check against");
   bool is_valid = verifier->valid_signature(signature, signature.size());
   send((is_valid ? 1 : 0));
   }

/*************************************************
* Set the signature to check                     *
*************************************************/
void PK_Verifier_Filter::set_signature(const byte sig[], u32bit length)
   {
   signature.set(sig, length);
   }

/*************************************************
* PK_Verifier_Filter Constructor                 *
*************************************************/
PK_Verifier_Filter::PK_Verifier_Filter(PK_Verifier* v, const byte sig[],
                                       u32bit length) :
   verifier(v), signature(sig, length)
   {
   }

}