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/*
* PK Operation Types
* (C) 2010,2015 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_PK_OPERATIONS_H__
#define BOTAN_PK_OPERATIONS_H__
#include <botan/pk_keys.h>
#include <botan/secmem.h>
#include <botan/rng.h>
namespace Botan {
class EME;
class KDF;
class EMSA;
namespace PK_Ops {
template<typename Key>
class PK_Spec
{
public:
PK_Spec(const Key& key, const std::string& pad) :
m_key(key), m_pad(pad) {}
std::string algo_name() const { return m_key.algo_name(); }
std::string as_string() const { return algo_name() + "/" + padding(); }
const Key& key() const { return m_key; }
const std::string& padding() const { return m_pad; }
private:
const Key& m_key;
const std::string m_pad;
};
typedef PK_Spec<Public_Key> PK_Spec_Public_Key;
typedef PK_Spec<Private_Key> PK_Spec_Private_Key;
/**
* Public key encryption interface
*/
class BOTAN_DLL Encryption
{
public:
typedef PK_Spec_Public_Key Spec;
virtual size_t max_input_bits() const = 0;
virtual secure_vector<byte> encrypt(const byte msg[],
size_t msg_len,
RandomNumberGenerator& rng) = 0;
virtual ~Encryption() {}
};
/**
* Public key decryption interface
*/
class BOTAN_DLL Decryption
{
public:
typedef PK_Spec_Private_Key Spec;
virtual size_t max_input_bits() const = 0;
virtual secure_vector<byte> decrypt(byte& valid_mask,
const byte ciphertext[],
size_t ciphertext_len) = 0;
virtual ~Decryption() {}
};
/**
* Public key signature verification interface
*/
class BOTAN_DLL Verification
{
public:
typedef PK_Spec_Public_Key Spec;
/*
* Add more data to the message currently being signed
* @param msg the message
* @param msg_len the length of msg in bytes
*/
virtual void update(const byte msg[], size_t msg_len) = 0;
/*
* Perform a signature operation
* @param rng a random number generator
*/
virtual bool is_valid_signature(const byte sig[], size_t sig_len) = 0;
/**
* Get the maximum message size in bits supported by this public key.
* @return maximum message in bits
*/
virtual size_t max_input_bits() const = 0;
/**
* Find out the number of message parts supported by this scheme.
* @return number of message parts
*/
virtual size_t message_parts() const { return 1; }
/**
* Find out the message part size supported by this scheme/key.
* @return size of the message parts
*/
virtual size_t message_part_size() const { return 0; }
virtual ~Verification() {}
};
/**
* Public key signature creation interface
*/
class BOTAN_DLL Signature
{
public:
typedef PK_Spec_Private_Key Spec;
/**
* Find out the number of message parts supported by this scheme.
* @return number of message parts
*/
virtual size_t message_parts() const { return 1; }
/**
* Find out the message part size supported by this scheme/key.
* @return size of the message parts
*/
virtual size_t message_part_size() const { return 0; }
/*
* Add more data to the message currently being signed
* @param msg the message
* @param msg_len the length of msg in bytes
*/
virtual void update(const byte msg[], size_t msg_len) = 0;
/*
* Perform a signature operation
* @param rng a random number generator
*/
virtual secure_vector<byte> sign(RandomNumberGenerator& rng) = 0;
virtual ~Signature() {}
};
/**
* A generic key agreement operation (eg DH or ECDH)
*/
class BOTAN_DLL Key_Agreement
{
public:
typedef PK_Spec_Private_Key Spec;
virtual secure_vector<byte> agree(size_t key_len,
const byte other_key[], size_t other_key_len,
const byte salt[], size_t salt_len) = 0;
virtual ~Key_Agreement() {}
};
/**
* KEM (key encapsulation)
*/
class BOTAN_DLL KEM_Encryption
{
public:
typedef PK_Spec_Public_Key Spec;
virtual void kem_encrypt(secure_vector<byte>& out_encapsulated_key,
secure_vector<byte>& out_shared_key,
size_t desired_shared_key_len,
Botan::RandomNumberGenerator& rng,
const uint8_t salt[],
size_t salt_len) = 0;
virtual ~KEM_Encryption() {}
};
class BOTAN_DLL KEM_Decryption
{
public:
typedef PK_Spec_Private_Key Spec;
virtual secure_vector<byte> kem_decrypt(const byte encap_key[],
size_t len,
size_t desired_shared_key_len,
const uint8_t salt[],
size_t salt_len) = 0;
virtual ~KEM_Decryption() {}
};
}
}
#endif
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