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/* Copyright (c) 2012, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#ifndef TOR_CRYPTO_CURVE25519_H
#define TOR_CRYPTO_CURVE25519_H
#include "torint.h"
/** Length of a curve25519 public key when encoded. */
#define CURVE25519_PUBKEY_LEN 32
/** Length of a curve25519 secret key when encoded. */
#define CURVE25519_SECKEY_LEN 32
/** Length of the result of a curve25519 handshake. */
#define CURVE25519_OUTPUT_LEN 32
/** Wrapper type for a curve25519 public key */
typedef struct curve25519_public_key_t {
uint8_t public_key[CURVE25519_PUBKEY_LEN];
} curve25519_public_key_t;
/** Wrapper type for a curve25519 secret key */
typedef struct curve25519_secret_key_t {
uint8_t secret_key[CURVE25519_SECKEY_LEN];
} curve25519_secret_key_t;
int curve25519_public_key_is_ok(const curve25519_public_key_t *);
void curve25519_secret_key_generate(curve25519_secret_key_t *key_out,
int extra_strong);
void curve25519_public_key_generate(curve25519_public_key_t *key_out,
const curve25519_secret_key_t *seckey);
void curve25519_handshake(uint8_t *output,
const curve25519_secret_key_t *,
const curve25519_public_key_t *);
#ifdef CRYPTO_CURVE25519_PRIVATE
int curve25519_impl(uint8_t *output, const uint8_t *secret,
const uint8_t *basepoint);
#endif
#endif
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