Botan  1.10.9
Public Member Functions | List of all members
Botan::PK_Encryptor_EME Class Reference

#include <pubkey.h>

Inheritance diagram for Botan::PK_Encryptor_EME:
Botan::PK_Encryptor

Public Member Functions

SecureVector< byteencrypt (const byte in[], size_t length, RandomNumberGenerator &rng) const
 
SecureVector< byteencrypt (const MemoryRegion< byte > &in, RandomNumberGenerator &rng) const
 
size_t maximum_input_size () const
 
 PK_Encryptor_EME (const Public_Key &key, const std::string &eme)
 
 ~PK_Encryptor_EME ()
 

Detailed Description

Encryption with an MR algorithm and an EME.

Definition at line 398 of file pubkey.h.

Constructor & Destructor Documentation

Botan::PK_Encryptor_EME::PK_Encryptor_EME ( const Public_Key key,
const std::string &  eme 
)

Construct an instance.

Parameters
keythe key to use inside the decryptor
emethe EME to use

Definition at line 25 of file pubkey.cpp.

References Botan::Public_Key::algo_name(), Botan::get_eme(), Botan::Global_State_Management::global_state(), and Botan::Algorithm_Factory::Engine_Iterator::next().

27  {
28  Algorithm_Factory::Engine_Iterator i(global_state().algorithm_factory());
29 
30  op = 0;
31 
32  while(const Engine* engine = i.next())
33  {
34  op = engine->get_encryption_op(key);
35  if(op)
36  break;
37  }
38 
39  if(!op)
40  throw Lookup_Error("Encryption with " + key.algo_name() + " not supported");
41 
42  eme = (eme_name == "Raw") ? 0 : get_eme(eme_name);
43  }
friend class Engine_Iterator
Definition: algo_factory.h:207
Library_State & global_state()
EME * get_eme(const std::string &algo_spec)
Definition: get_enc.cpp:143
Botan::PK_Encryptor_EME::~PK_Encryptor_EME ( )
inline

Definition at line 411 of file pubkey.h.

411 { delete op; delete eme; }

Member Function Documentation

SecureVector<byte> Botan::PK_Encryptor::encrypt ( const byte  in[],
size_t  length,
RandomNumberGenerator rng 
) const
inlineinherited

Encrypt a message.

Parameters
inthe message as a byte array
lengththe length of the above byte array
rngthe random number source to use
Returns
encrypted message

Definition at line 48 of file pubkey.h.

Referenced by Botan::Client_Key_Exchange::Client_Key_Exchange(), Botan::KeyPair::encryption_consistency_check(), and Botan::PK_Encryptor_Filter::end_msg().

50  {
51  return enc(in, length, rng);
52  }
RandomNumberGenerator * rng
Definition: global_rng.cpp:165
SecureVector<byte> Botan::PK_Encryptor::encrypt ( const MemoryRegion< byte > &  in,
RandomNumberGenerator rng 
) const
inlineinherited

Encrypt a message.

Parameters
inthe message
rngthe random number source to use
Returns
encrypted message

Definition at line 60 of file pubkey.h.

References rng, and Botan::MemoryRegion< T >::size().

62  {
63  return enc(&in[0], in.size(), rng);
64  }
RandomNumberGenerator * rng
Definition: global_rng.cpp:165
size_t size() const
Definition: secmem.h:29
size_t Botan::PK_Encryptor_EME::maximum_input_size ( ) const
virtual

Return the maximum allowed message size in bytes.

Returns
maximum message size in bytes

Implements Botan::PK_Encryptor.

Definition at line 75 of file pubkey.cpp.

References Botan::PK_Ops::Encryption::max_input_bits(), and Botan::EME::maximum_input_size().

Referenced by Botan::KeyPair::encryption_consistency_check().

76  {
77  if(!eme)
78  return (op->max_input_bits() / 8);
79  else
80  return eme->maximum_input_size(op->max_input_bits());
81  }
virtual size_t max_input_bits() const =0
virtual size_t maximum_input_size(size_t keybits) const =0

The documentation for this class was generated from the following files: