summaryrefslogtreecommitdiff
path: root/key.h
blob: 4beaf202ea054006dddf8b4e55e4fc06c8a62bb0 (plain)
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
/* $OpenBSD: key.h,v 1.35 2013/01/17 23:00:01 djm Exp $ */

/*
 * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef KEY_H
#define KEY_H

#include "buffer.h"
#include <openssl/rsa.h>
#include <openssl/dsa.h>
#ifdef OPENSSL_HAS_ECC
#include <openssl/ec.h>
#endif

typedef struct Key Key;
enum types {
	KEY_RSA1,
	KEY_RSA,
	KEY_DSA,
	KEY_ECDSA,
	KEY_RSA_CERT,
	KEY_DSA_CERT,
	KEY_ECDSA_CERT,
	KEY_RSA_CERT_V00,
	KEY_DSA_CERT_V00,
	KEY_NULL,
	KEY_UNSPEC
};
enum fp_type {
	SSH_FP_SHA1,
	SSH_FP_MD5,
	SSH_FP_SHA256
};
enum fp_rep {
	SSH_FP_HEX,
	SSH_FP_BUBBLEBABBLE,
	SSH_FP_RANDOMART
};

/* key is stored in external hardware */
#define KEY_FLAG_EXT		0x0001

#define CERT_MAX_PRINCIPALS	256
struct KeyCert {
	Buffer		 certblob; /* Kept around for use on wire */
	u_int		 type; /* SSH2_CERT_TYPE_USER or SSH2_CERT_TYPE_HOST */
	u_int64_t	 serial;
	char		*key_id;
	u_int		 nprincipals;
	char		**principals;
	u_int64_t	 valid_after, valid_before;
	Buffer		 critical;
	Buffer		 extensions;
	Key		*signature_key;
};

struct Key {
	int	 type;
	int	 flags;
	RSA	*rsa;
	DSA	*dsa;
	int	 ecdsa_nid;	/* NID of curve */
#ifdef OPENSSL_HAS_ECC
	EC_KEY	*ecdsa;
#else
	void	*ecdsa;
#endif
	struct KeyCert *cert;
};

Key		*key_new(int);
void		 key_add_private(Key *);
Key		*key_new_private(int);
void		 key_free(Key *);
Key		*key_demote(const Key *);
int		 key_equal_public(const Key *, const Key *);
int		 key_equal(const Key *, const Key *);
char		*key_fingerprint(Key *, enum fp_type, enum fp_rep);
u_char		*key_fingerprint_raw(const Key *, enum fp_type, u_int *);
const char	*key_type(const Key *);
const char	*key_cert_type(const Key *);
int		 key_write(const Key *, FILE *);
int		 key_read(Key *, char **);
u_int		 key_size(const Key *);

Key	*key_generate(int, u_int);
Key	*key_from_private(const Key *);
int	 key_type_from_name(char *);
int	 key_is_cert(const Key *);
int	 key_type_plain(int);
int	 key_to_certified(Key *, int);
int	 key_drop_cert(Key *);
int	 key_certify(Key *, Key *);
void	 key_cert_copy(const Key *, struct Key *);
int	 key_cert_check_authority(const Key *, int, int, const char *,
	    const char **);
int	 key_cert_is_legacy(const Key *);

int		 key_ecdsa_nid_from_name(const char *);
int		 key_curve_name_to_nid(const char *);
const char *	 key_curve_nid_to_name(int);
u_int		 key_curve_nid_to_bits(int);
int		 key_ecdsa_bits_to_nid(int);
#ifdef OPENSSL_HAS_ECC
int		 key_ecdsa_key_to_nid(EC_KEY *);
const EVP_MD *	 key_ec_nid_to_evpmd(int nid);
int		 key_ec_validate_public(const EC_GROUP *, const EC_POINT *);
int		 key_ec_validate_private(const EC_KEY *);
#endif

Key		*key_from_blob(const u_char *, u_int);
int		 key_to_blob(const Key *, u_char **, u_int *);
const char	*key_ssh_name(const Key *);
const char	*key_ssh_name_plain(const Key *);
int		 key_names_valid2(const char *);

int	 key_sign(const Key *, u_char **, u_int *, const u_char *, u_int);
int	 key_verify(const Key *, const u_char *, u_int, const u_char *, u_int);

int	 ssh_dss_sign(const Key *, u_char **, u_int *, const u_char *, u_int);
int	 ssh_dss_verify(const Key *, const u_char *, u_int, const u_char *, u_int);
int	 ssh_ecdsa_sign(const Key *, u_char **, u_int *, const u_char *, u_int);
int	 ssh_ecdsa_verify(const Key *, const u_char *, u_int, const u_char *, u_int);
int	 ssh_rsa_sign(const Key *, u_char **, u_int *, const u_char *, u_int);
int	 ssh_rsa_verify(const Key *, const u_char *, u_int, const u_char *, u_int);

#if defined(OPENSSL_HAS_ECC) && (defined(DEBUG_KEXECDH) || defined(DEBUG_PK))
void	key_dump_ec_point(const EC_GROUP *, const EC_POINT *);
void	key_dump_ec_key(const EC_KEY *);
#endif

#endif