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
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
/* Copyright (c) 2001 Matej Pfajfar.
* Copyright (c) 2001-2004, Roger Dingledine.
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson. */
/* See LICENSE for licensing information */
/* $Id$ */
/**
* \file crypto.h
*
* \brief Headers for crypto.c
**/
#ifndef __CRYPTO_H
#define __CRYPTO_H
#define CRYPTO_H_ID "$Id$"
#include <stdio.h>
/** Length of the output of our message digest. */
#define DIGEST_LEN 20
/** Length of our symmetric cipher's keys. */
#define CIPHER_KEY_LEN 16
/** Length of our public keys. */
#define PK_BYTES (1024/8)
/** Length of our DH keys. */
#define DH_BYTES (1024/8)
/** Length of a message digest when encoded in base64 with trailing = signs
* removed. */
#define BASE64_DIGEST_LEN 27
/** Constants used to indicate no padding for public-key encryption */
#define PK_NO_PADDING 60000
/** Constants used to indicate PKCS1 padding for public-key encryption */
#define PK_PKCS1_PADDING 60001
/** Constants used to indicate OAEP padding for public-key encryption */
#define PK_PKCS1_OAEP_PADDING 60002
/** Number of bytes added for PKCS1 padding. */
#define PKCS1_PADDING_OVERHEAD 11
/** Number of bytes added for PKCS1-OAEP padding. */
#define PKCS1_OAEP_PADDING_OVERHEAD 42
/** Length of encoded public key fingerprints, including space; but not
* including terminating NUL. */
#define FINGERPRINT_LEN 49
/** Length of hex encoding of SHA1 digest, not including final NUL. */
#define HEX_DIGEST_LEN 40
typedef struct crypto_pk_env_t crypto_pk_env_t;
typedef struct crypto_cipher_env_t crypto_cipher_env_t;
typedef struct crypto_digest_env_t crypto_digest_env_t;
typedef struct crypto_dh_env_t crypto_dh_env_t;
/* global state */
int crypto_global_init(int hardwareAccel);
void crypto_thread_cleanup(void);
int crypto_global_cleanup(void);
/* environment setup */
crypto_pk_env_t *crypto_new_pk_env(void);
void crypto_free_pk_env(crypto_pk_env_t *env);
/* convenience function: wraps crypto_create_crypto_env, set_key, and init. */
crypto_cipher_env_t *crypto_create_init_cipher(const char *key,
int encrypt_mode);
crypto_cipher_env_t *crypto_new_cipher_env(void);
void crypto_free_cipher_env(crypto_cipher_env_t *env);
/* public key crypto */
int crypto_pk_generate_key(crypto_pk_env_t *env);
int crypto_pk_read_private_key_from_filename(crypto_pk_env_t *env,
const char *keyfile);
int crypto_pk_write_public_key_to_string(crypto_pk_env_t *env,
char **dest, size_t *len);
int crypto_pk_read_public_key_from_string(crypto_pk_env_t *env,
const char *src, size_t len);
int crypto_pk_write_private_key_to_filename(crypto_pk_env_t *env,
const char *fname);
int crypto_pk_check_key(crypto_pk_env_t *env);
int crypto_pk_cmp_keys(crypto_pk_env_t *a, crypto_pk_env_t *b);
size_t crypto_pk_keysize(crypto_pk_env_t *env);
crypto_pk_env_t *crypto_pk_dup_key(crypto_pk_env_t *orig);
int crypto_pk_public_encrypt(crypto_pk_env_t *env, char *to,
const char *from, size_t fromlen, int padding);
int crypto_pk_private_decrypt(crypto_pk_env_t *env, char *to,
const char *from, size_t fromlen,
int padding, int warnOnFailure);
int crypto_pk_public_checksig(crypto_pk_env_t *env, char *to,
const char *from, size_t fromlen);
int crypto_pk_public_checksig_digest(crypto_pk_env_t *env, const char *data,
int datalen, const char *sig, int siglen);
int crypto_pk_private_sign(crypto_pk_env_t *env, char *to,
const char *from, size_t fromlen);
int crypto_pk_private_sign_digest(crypto_pk_env_t *env, char *to,
const char *from, size_t fromlen);
int crypto_pk_public_hybrid_encrypt(crypto_pk_env_t *env, char *to,
const char *from, size_t fromlen,
int padding, int force);
int crypto_pk_private_hybrid_decrypt(crypto_pk_env_t *env, char *to,
const char *from, size_t fromlen,
int padding, int warnOnFailure);
int crypto_pk_asn1_encode(crypto_pk_env_t *pk, char *dest, int dest_len);
crypto_pk_env_t *crypto_pk_asn1_decode(const char *str, size_t len);
int crypto_pk_get_digest(crypto_pk_env_t *pk, char *digest_out);
int crypto_pk_get_fingerprint(crypto_pk_env_t *pk, char *fp_out,int add_space);
int crypto_pk_check_fingerprint_syntax(const char *s);
/* symmetric crypto */
int crypto_cipher_generate_key(crypto_cipher_env_t *env);
int crypto_cipher_set_key(crypto_cipher_env_t *env, const char *key);
const char *crypto_cipher_get_key(crypto_cipher_env_t *env);
int crypto_cipher_encrypt_init_cipher(crypto_cipher_env_t *env);
int crypto_cipher_decrypt_init_cipher(crypto_cipher_env_t *env);
int crypto_cipher_encrypt(crypto_cipher_env_t *env, char *to,
const char *from, size_t fromlen);
int crypto_cipher_decrypt(crypto_cipher_env_t *env, char *to,
const char *from, size_t fromlen);
/* SHA-1 */
int crypto_digest(char *digest, const char *m, size_t len);
crypto_digest_env_t *crypto_new_digest_env(void);
void crypto_free_digest_env(crypto_digest_env_t *digest);
void crypto_digest_add_bytes(crypto_digest_env_t *digest, const char *data,
size_t len);
void crypto_digest_get_digest(crypto_digest_env_t *digest,
char *out, size_t out_len);
crypto_digest_env_t *crypto_digest_dup(const crypto_digest_env_t *digest);
void crypto_digest_assign(crypto_digest_env_t *into,
const crypto_digest_env_t *from);
/* Key negotiation */
crypto_dh_env_t *crypto_dh_new(void);
int crypto_dh_get_bytes(crypto_dh_env_t *dh);
int crypto_dh_generate_public(crypto_dh_env_t *dh);
int crypto_dh_get_public(crypto_dh_env_t *dh, char *pubkey_out,
size_t pubkey_out_len);
int crypto_dh_compute_secret(crypto_dh_env_t *dh,
const char *pubkey, size_t pubkey_len,
char *secret_out, size_t secret_out_len);
void crypto_dh_free(crypto_dh_env_t *dh);
int crypto_expand_key_material(const char *key_in, size_t in_len,
char *key_out, size_t key_out_len);
/* random numbers */
int crypto_seed_rng(void);
int crypto_rand(char *to, size_t n);
int crypto_rand_int(unsigned int max);
struct smartlist_t;
void *smartlist_choose(const struct smartlist_t *sl);
int base64_encode(char *dest, size_t destlen, const char *src, size_t srclen);
int base64_decode(char *dest, size_t destlen, const char *src, size_t srclen);
#define BASE32_CHARS "abcdefghijklmnopqrstuvwxyz234567"
void base32_encode(char *dest, size_t destlen, const char *src, size_t srclen);
int digest_to_base64(char *d64, const char *digest);
int digest_from_base64(char *digest, const char *d64);
#define S2K_SPECIFIER_LEN 9
void secret_to_key(char *key_out, size_t key_out_len, const char *secret,
size_t secret_len, const char *s2k_specifier);
#endif
|