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/************************************************************************************
Copyright (C) 2017-2019 MariaDB Corporation AB
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not see <http://www.gnu.org/licenses>
or write to the Free Software Foundation, Inc.,
51 Franklin St., Fifth Floor, Boston, MA 02110, USA
*************************************************************************************/
#ifndef _WIN32
#define _GNU_SOURCE 1
#endif
#ifdef HAVE_WINCRYPT
#undef HAVE_OPENSSL
#undef HAVE_GNUTLS
#endif
#if defined(HAVE_OPENSSL) || defined(HAVE_WINCRYPT) || defined(HAVE_GNUTLS)
#include <ma_global.h>
#include <mysql.h>
#include <mysql/client_plugin.h>
#include <string.h>
#include <memory.h>
#include <errmsg.h>
#include <ma_global.h>
#include <ma_sys.h>
#include <ma_common.h>
#ifndef WIN32
#include <dlfcn.h>
#endif
#if defined(HAVE_WINCRYPT)
#include <windows.h>
#include <wincrypt.h>
#include <bcrypt.h>
#elif defined(HAVE_OPENSSL)
#include <openssl/rsa.h>
#include <openssl/pem.h>
#include <openssl/err.h>
#elif defined(HAVE_GNUTLS)
#include <gnutls/gnutls.h>
#endif
#include <ref10/api.h>
#include <ed25519_common.h>
#include <ma_crypt.h>
/* function prototypes */
static int auth_ed25519_client(MYSQL_PLUGIN_VIO *vio, MYSQL *mysql);
static int auth_ed25519_deinit(void);
static int auth_ed25519_init(char *unused1,
size_t unused2,
int unused3,
va_list);
static int auth_ed25519_hash(MYSQL *, unsigned char *out, size_t *outlen);
#ifndef PLUGIN_DYNAMIC
struct st_mysql_client_plugin_AUTHENTICATION client_ed25519_client_plugin=
#else
struct st_mysql_client_plugin_AUTHENTICATION _mysql_client_plugin_declaration_ =
#endif
{
MYSQL_CLIENT_AUTHENTICATION_PLUGIN,
MYSQL_CLIENT_AUTHENTICATION_PLUGIN_INTERFACE_VERSION,
"client_ed25519",
"Sergei Golubchik, Georg Richter",
"Ed25519 Authentication Plugin",
{0,1,1},
"LGPL",
NULL,
auth_ed25519_init,
auth_ed25519_deinit,
NULL,
auth_ed25519_client,
auth_ed25519_hash
};
static int auth_ed25519_client(MYSQL_PLUGIN_VIO *vio, MYSQL *mysql)
{
unsigned char *packet,
signature[CRYPTO_BYTES + NONCE_BYTES],
pk[CRYPTO_PUBLICKEYBYTES];
unsigned long long pkt_len;
size_t pwlen= strlen(mysql->passwd);
char *newpw;
/*
Step 1: Server sends nonce
Step 2: check that packet length is equal to NONCE_BYTES (=32)
Step 3: Sign the nonce with password
Steo 4: Send the signature back to server
*/
/* read and check nonce */
pkt_len= vio->read_packet(vio, &packet);
if (pkt_len != NONCE_BYTES)
return CR_SERVER_HANDSHAKE_ERR;
/* Sign nonce: the crypto_sign function is part of ref10 */
ma_crypto_sign(signature, pk, packet, NONCE_BYTES, (unsigned char*)mysql->passwd, pwlen);
/* send signature to server */
if (vio->write_packet(vio, signature, CRYPTO_BYTES))
return CR_ERROR;
/* save pk for the future auth_ed25519_hash() call */
if ((newpw= realloc(mysql->passwd, pwlen + 1 + sizeof(pk))))
{
memcpy(newpw + pwlen + 1, pk, sizeof(pk));
mysql->passwd= newpw;
}
return CR_OK;
}
/* }}} */
/* {{{ static int auth_ed25519_hash */
static int auth_ed25519_hash(MYSQL *mysql, unsigned char *out, size_t *outlen)
{
if (*outlen < CRYPTO_PUBLICKEYBYTES)
return 1;
*outlen= CRYPTO_PUBLICKEYBYTES;
/* use the cached value */
memcpy(out, mysql->passwd + strlen(mysql->passwd) + 1, CRYPTO_PUBLICKEYBYTES);
return 0;
}
/* }}} */
/* {{{ static int auth_ed25519_init */
static int auth_ed25519_init(char *unused1 __attribute__((unused)),
size_t unused2 __attribute__((unused)),
int unused3 __attribute__((unused)),
va_list unused4 __attribute__((unused)))
{
return 0;
}
/* }}} */
/* {{{ auth_ed25519_deinit */
static int auth_ed25519_deinit(void)
{
return 0;
}
/* }}} */
#endif /* defined(HAVE_OPENSSL) || defined(HAVE_WINCRYPT) || defined(HAVE_GNUTLS)*/
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