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
|
/*
Copyright (c) 2017, MariaDB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA */
#include <mysql/plugin_auth.h>
#include "common.h"
#if !defined(__attribute__) && !defined(__GNUC__)
#define __attribute__(A)
#endif
#define PASSWORD_LEN_BUF 44 /* base64 of 32 bytes */
#define PASSWORD_LEN 43 /* we won't store the last byte, padding '=' */
#define CRYPTO_LONGS (CRYPTO_BYTES/sizeof(long))
#define NONCE_LONGS (NONCE_BYTES/sizeof(long))
/************************** SERVER *************************************/
static int loaded= 0;
static int auth(MYSQL_PLUGIN_VIO *vio, MYSQL_SERVER_AUTH_INFO *info)
{
int pkt_len;
unsigned long nonce[CRYPTO_LONGS + NONCE_LONGS];
unsigned char *pkt, *reply= (unsigned char*)nonce;
unsigned char pk[PASSWORD_LEN_BUF/4*3];
char pw[PASSWORD_LEN_BUF];
/* prepare the pk */
if (info->auth_string_length != PASSWORD_LEN)
return CR_AUTH_USER_CREDENTIALS;
memcpy(pw, info->auth_string, PASSWORD_LEN);
pw[PASSWORD_LEN]= '=';
if (my_base64_decode(pw, PASSWORD_LEN_BUF, pk, NULL, 0) != CRYPTO_PUBLICKEYBYTES)
return CR_AUTH_USER_CREDENTIALS;
info->password_used= PASSWORD_USED_YES;
/* prepare random nonce */
if (my_random_bytes((unsigned char *)nonce, (int)sizeof(nonce)))
return CR_AUTH_USER_CREDENTIALS;
/* send it */
if (vio->write_packet(vio, reply + CRYPTO_BYTES, NONCE_BYTES))
return CR_AUTH_HANDSHAKE;
/* read the signature */
if ((pkt_len= vio->read_packet(vio, &pkt)) != CRYPTO_BYTES)
return CR_AUTH_HANDSHAKE;
memcpy(reply, pkt, CRYPTO_BYTES);
if (crypto_sign_open(reply, CRYPTO_BYTES + NONCE_BYTES, pk))
return CR_ERROR;
return CR_OK;
}
static struct st_mysql_auth info =
{
MYSQL_AUTHENTICATION_INTERFACE_VERSION,
"client_ed25519",
auth
};
static int init(void *p __attribute__((unused)))
{
loaded= 1;
return 0;
}
static int deinit(void *p __attribute__((unused)))
{
loaded= 0;
return 0;
}
maria_declare_plugin(ed25519)
{
MYSQL_AUTHENTICATION_PLUGIN,
&info,
"ed25519",
"Sergei Golubchik",
"Elliptic curve ED25519 based authentication",
PLUGIN_LICENSE_GPL,
init,
deinit,
0x0100,
NULL,
NULL,
"1.0-alpha",
MariaDB_PLUGIN_MATURITY_STABLE
}
maria_declare_plugin_end;
/************************** UDF ****************************************/
MYSQL_PLUGIN_EXPORT
char *ed25519_password(UDF_INIT *initid __attribute__((unused)),
UDF_ARGS *args, char *result, unsigned long *length,
char *is_null, char *error __attribute__((unused)))
{
unsigned char pk[CRYPTO_PUBLICKEYBYTES];
if ((*is_null= !args->args[0]))
return NULL;
*length= PASSWORD_LEN;
crypto_sign_keypair(pk, (unsigned char*)args->args[0], args->lengths[0]);
my_base64_encode(pk, CRYPTO_PUBLICKEYBYTES, result);
return result;
}
/*
At least one of _init/_deinit is needed unless the server is started
with --allow_suspicious_udfs.
*/
MYSQL_PLUGIN_EXPORT
my_bool ed25519_password_init(UDF_INIT *initid, UDF_ARGS *args, char *message)
{
if (args->arg_count != 1 || args->arg_type[0] != STRING_RESULT)
{
strcpy(message,"Wrong arguments to ed25519_password()");
return 1;
}
if (!loaded)
{
/* cannot work unless the plugin is loaded, we need services. */
strcpy(message,"Authentication plugin ed25519 is not loaded");
return 1;
}
initid->max_length= PASSWORD_LEN_BUF;
return 0;
}
|
