/usr/include/botan-1.10/botan/dh.h is in libbotan1.10-dev 1.10.16-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 | /*
* Diffie-Hellman
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_DIFFIE_HELLMAN_H__
#define BOTAN_DIFFIE_HELLMAN_H__
#include <botan/dl_algo.h>
#include <botan/pow_mod.h>
#include <botan/blinding.h>
#include <botan/pk_ops.h>
namespace Botan {
/**
* This class represents Diffie-Hellman public keys.
*/
class BOTAN_DLL DH_PublicKey : public virtual DL_Scheme_PublicKey
{
public:
std::string algo_name() const { return "DH"; }
MemoryVector<byte> public_value() const;
size_t max_input_bits() const { return group_p().bits(); }
DL_Group::Format group_format() const { return DL_Group::ANSI_X9_42; }
DH_PublicKey(const AlgorithmIdentifier& alg_id,
const MemoryRegion<byte>& key_bits) :
DL_Scheme_PublicKey(alg_id, key_bits, DL_Group::ANSI_X9_42) {}
/**
* Construct a public key with the specified parameters.
* @param grp the DL group to use in the key
* @param y the public value y
*/
DH_PublicKey(const DL_Group& grp, const BigInt& y);
protected:
DH_PublicKey() {}
};
/**
* This class represents Diffie-Hellman private keys.
*/
class BOTAN_DLL DH_PrivateKey : public DH_PublicKey,
public PK_Key_Agreement_Key,
public virtual DL_Scheme_PrivateKey
{
public:
MemoryVector<byte> public_value() const;
/**
* Load a DH private key
* @param alg_id the algorithm id
* @param key_bits the subject public key
* @param rng a random number generator
*/
DH_PrivateKey(const AlgorithmIdentifier& alg_id,
const MemoryRegion<byte>& key_bits,
RandomNumberGenerator& rng);
/**
* Construct a private key with predetermined value.
* @param rng random number generator to use
* @param grp the group to be used in the key
* @param x the key's secret value (or if zero, generate a new key)
*/
DH_PrivateKey(RandomNumberGenerator& rng, const DL_Group& grp,
const BigInt& x = 0);
};
/**
* DH operation
*/
class BOTAN_DLL DH_KA_Operation : public PK_Ops::Key_Agreement
{
public:
DH_KA_Operation(const DH_PrivateKey& key);
SecureVector<byte> agree(const byte w[], size_t w_len);
private:
const BigInt& p;
Fixed_Exponent_Power_Mod powermod_x_p;
Blinder blinder;
};
}
#endif
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