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/************************************************************************************
Copyright (C) 2014 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
*************************************************************************************/
/*
* this is the abstraction layer for communication via SSL.
* The following SSL libraries/variants are currently supported:
* - openssl
* - gnutls
* - schannel (windows only)
*
* Different SSL variants are implemented as plugins
* On Windows schannel is implemented as (standard)
* built-in plugin.
*/
#ifdef HAVE_TLS
#include <ma_global.h>
#include <ma_sys.h>
#include <ma_common.h>
#include <string.h>
#include <errmsg.h>
#include <ma_pvio.h>
#include <ma_tls.h>
#include <mysql/client_plugin.h>
#include <mariadb/ma_io.h>
#ifdef HAVE_NONBLOCK
#include <mariadb_async.h>
#include <ma_context.h>
#endif
/* Errors should be handled via pvio callback function */
my_bool ma_tls_initialized= FALSE;
unsigned int mariadb_deinitialize_ssl= 1;
const char *tls_protocol_version[]=
{"SSLv3", "TLSv1.0", "TLSv1.1", "TLSv1.2", "TLSv1.3", "Unknown"};
MARIADB_TLS *ma_pvio_tls_init(MYSQL *mysql)
{
MARIADB_TLS *ctls= NULL;
if (!ma_tls_initialized)
ma_tls_start(mysql->net.last_error, MYSQL_ERRMSG_SIZE);
if (!(ctls= (MARIADB_TLS *)calloc(1, sizeof(MARIADB_TLS))))
{
return NULL;
}
/* register error routine and methods */
ctls->pvio= mysql->net.pvio;
if (!(ctls->ssl= ma_tls_init(mysql)))
{
free(ctls);
ctls= NULL;
}
return ctls;
}
my_bool ma_pvio_tls_connect(MARIADB_TLS *ctls)
{
my_bool rc;
if ((rc= ma_tls_connect(ctls)))
ma_tls_close(ctls);
return rc;
}
ssize_t ma_pvio_tls_read(MARIADB_TLS *ctls, const uchar* buffer, size_t length)
{
return ma_tls_read(ctls, buffer, length);
}
ssize_t ma_pvio_tls_write(MARIADB_TLS *ctls, const uchar* buffer, size_t length)
{
return ma_tls_write(ctls, buffer, length);
}
my_bool ma_pvio_tls_close(MARIADB_TLS *ctls)
{
return ma_tls_close(ctls);
}
int ma_pvio_tls_verify_server_cert(MARIADB_TLS *ctls)
{
return ma_tls_verify_server_cert(ctls);
}
const char *ma_pvio_tls_cipher(MARIADB_TLS *ctls)
{
return ma_tls_get_cipher(ctls);
}
void ma_pvio_tls_end()
{
ma_tls_end();
}
int ma_pvio_tls_get_protocol_version_id(MARIADB_TLS *ctls)
{
return ma_tls_get_protocol_version(ctls);
}
const char *ma_pvio_tls_get_protocol_version(MARIADB_TLS *ctls)
{
int version;
version= ma_tls_get_protocol_version(ctls);
if (version < 0 || version > PROTOCOL_MAX)
return tls_protocol_version[PROTOCOL_UNKNOWN];
return tls_protocol_version[version];
}
static char ma_hex2int(char c)
{
if (c >= '0' && c <= '9')
return c - '0';
if (c >= 'A' && c <= 'F')
return 10 + c - 'A';
if (c >= 'a' && c <= 'f')
return 10 + c - 'a';
return -1;
}
static my_bool ma_pvio_tls_compare_fp(const char *cert_fp,
unsigned int cert_fp_len,
const char *fp, unsigned int fp_len)
{
char *p= (char *)fp,
*c;
/* check length */
if (cert_fp_len != 20)
return 1;
/* We support two formats:
2 digits hex numbers, separated by colons (length=59)
20 * 2 digits hex numbers without separators (length = 40)
*/
if (fp_len != (strchr(fp, ':') ? 59 : 40))
return 1;
for(c= (char *)cert_fp; c < cert_fp + cert_fp_len; c++)
{
char d1, d2;
if (*p == ':')
p++;
if (p - fp > (int)fp_len -1)
return 1;
if ((d1 = ma_hex2int(*p)) == - 1 ||
(d2 = ma_hex2int(*(p+1))) == -1 ||
(char)(d1 * 16 + d2) != *c)
return 1;
p+= 2;
}
return 0;
}
my_bool ma_pvio_tls_check_fp(MARIADB_TLS *ctls, const char *fp, const char *fp_list)
{
unsigned int cert_fp_len= 64;
char *cert_fp= NULL;
my_bool rc=1;
MYSQL *mysql= ctls->pvio->mysql;
cert_fp= (char *)malloc(cert_fp_len);
if ((cert_fp_len= ma_tls_get_finger_print(ctls, cert_fp, cert_fp_len)) < 1)
goto end;
if (fp)
rc= ma_pvio_tls_compare_fp(cert_fp, cert_fp_len, fp, (unsigned int)strlen(fp));
else if (fp_list)
{
MA_FILE *fp;
char buff[255];
if (!(fp = ma_open(fp_list, "r", mysql)))
goto end;
while (ma_gets(buff, sizeof(buff)-1, fp))
{
/* remove trailing new line character */
char *pos= strchr(buff, '\r');
if (!pos)
pos= strchr(buff, '\n');
if (pos)
*pos= '\0';
if (!ma_pvio_tls_compare_fp(cert_fp, cert_fp_len, buff, (unsigned int)strlen(buff)))
{
/* finger print is valid: close file and exit */
ma_close(fp);
rc= 0;
goto end;
}
}
/* No finger print matched - close file and return error */
ma_close(fp);
}
end:
if (cert_fp)
free(cert_fp);
if (rc)
{
my_set_error(mysql, CR_SSL_CONNECTION_ERROR, SQLSTATE_UNKNOWN,
ER(CR_SSL_CONNECTION_ERROR),
"Fingerprint verification of server certificate failed");
}
return rc;
}
#endif /* HAVE_TLS */
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