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/*
* Ed25519
* (C) 2017 Ribose Inc
*
* Based on the public domain code from SUPERCOP ref10 by
* Peter Schwabe, Daniel J. Bernstein, Niels Duif, Tanja Lange, Bo-Yin Yang
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_ED25519_H_
#define BOTAN_ED25519_H_
#include <botan/pk_keys.h>
namespace Botan {
class BOTAN_PUBLIC_API(2,2) Ed25519_PublicKey : public virtual Public_Key
{
public:
std::string algo_name() const override { return "Ed25519"; }
size_t estimated_strength() const override { return 128; }
size_t key_length() const override { return 255; }
bool check_key(RandomNumberGenerator& rng, bool strong) const override;
AlgorithmIdentifier algorithm_identifier() const override;
std::vector<uint8_t> public_key_bits() const override;
/**
* Create a Ed25519 Public Key.
* @param alg_id the X.509 algorithm identifier
* @param key_bits DER encoded public key bits
*/
Ed25519_PublicKey(const AlgorithmIdentifier& alg_id,
const std::vector<uint8_t>& key_bits);
template<typename Alloc>
Ed25519_PublicKey(const std::vector<uint8_t, Alloc>& pub) :
Ed25519_PublicKey(pub.data(), pub.size()) {}
Ed25519_PublicKey(const uint8_t pub_key[], size_t len);
std::unique_ptr<PK_Ops::Verification>
create_verification_op(const std::string& params,
const std::string& provider) const override;
const std::vector<uint8_t>& get_public_key() const { return m_public; }
protected:
Ed25519_PublicKey() = default;
std::vector<uint8_t> m_public;
};
class BOTAN_PUBLIC_API(2,2) Ed25519_PrivateKey final : public Ed25519_PublicKey,
public virtual Private_Key
{
public:
/**
* Construct a private key from the specified parameters.
* @param alg_id the X.509 algorithm identifier
* @param key_bits PKCS #8 structure
*/
Ed25519_PrivateKey(const AlgorithmIdentifier& alg_id,
const secure_vector<uint8_t>& key_bits);
/**
* Generate a private key.
* @param rng the RNG to use
*/
explicit Ed25519_PrivateKey(RandomNumberGenerator& rng);
/**
* Construct a private key from the specified parameters.
* @param secret_key the private key
*/
explicit Ed25519_PrivateKey(const secure_vector<uint8_t>& secret_key);
const secure_vector<uint8_t>& get_private_key() const { return m_private; }
secure_vector<uint8_t> private_key_bits() const override;
bool check_key(RandomNumberGenerator& rng, bool strong) const override;
std::unique_ptr<PK_Ops::Signature>
create_signature_op(RandomNumberGenerator& rng,
const std::string& params,
const std::string& provider) const override;
private:
secure_vector<uint8_t> m_private;
};
void ed25519_gen_keypair(uint8_t pk[32], uint8_t sk[64], const uint8_t seed[32]);
void ed25519_sign(uint8_t sig[64],
const uint8_t msg[],
size_t msg_len,
const uint8_t sk[64],
const uint8_t domain_sep[], size_t domain_sep_len);
bool ed25519_verify(const uint8_t msg[],
size_t msg_len,
const uint8_t sig[64],
const uint8_t pk[32],
const uint8_t domain_sep[], size_t domain_sep_len);
}
#endif
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