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- /* Copyright (c) 2012-2013, 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;
- /** A paired public and private key for curve25519. **/
- typedef struct curve25519_keypair_t {
- curve25519_public_key_t pubkey;
- curve25519_secret_key_t seckey;
- } curve25519_keypair_t;
- #ifdef CURVE25519_ENABLED
- int curve25519_public_key_is_ok(const curve25519_public_key_t *);
- int 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);
- int curve25519_keypair_generate(curve25519_keypair_t *keypair_out,
- int extra_strong);
- void curve25519_handshake(uint8_t *output,
- const curve25519_secret_key_t *,
- const curve25519_public_key_t *);
- int curve25519_keypair_write_to_file(const curve25519_keypair_t *keypair,
- const char *fname,
- const char *tag);
- int curve25519_keypair_read_from_file(curve25519_keypair_t *keypair_out,
- char **tag_out,
- const char *fname);
- #define CURVE25519_BASE64_PADDED_LEN 44
- int curve25519_public_from_base64(curve25519_public_key_t *pkey,
- const char *input);
- int curve25519_public_to_base64(char *output,
- const curve25519_public_key_t *pkey);
- #ifdef CRYPTO_CURVE25519_PRIVATE
- int curve25519_impl(uint8_t *output, const uint8_t *secret,
- const uint8_t *basepoint);
- #endif
- #endif
- #endif
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