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
|
/* 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;
/** 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
|