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/*
Copyright (c) 2011, 2018 MariaDB Corporation
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 */
/*
This file contains definitions and functions for
the interface between the auth_pam.so (PAM plugin version 2)
and the auth_pam_tool executable.
To be included both in auth_pam.c and auth_pam_tool.c.
*/
#define AP_AUTHENTICATED_AS 'A'
#define AP_CONV 'C'
#define AP_EOF 'E'
static int read_length(int file)
{
unsigned char hdr[2];
if (read(file, hdr, 2) < 2)
return -1;
return (((int) hdr[0]) << 8) + (int) hdr[1];
}
static void store_length(int len, unsigned char *p_len)
{
p_len[0]= (unsigned char) ((len >> 8) & 0xFF);
p_len[1]= (unsigned char) (len & 0xFF);
}
/*
Returns the length of the string read,
or -1 on error.
*/
static int read_string(int file, char *s, int s_size)
{
int len;
len= read_length(file);
if (len < 0 || len > s_size-1 ||
read(file, s, len) < len)
return -1;
s[len]= 0;
return len;
}
/*
Returns 0 on success.
*/
static int write_string(int file, const unsigned char *s, int s_len)
{
unsigned char hdr[2];
store_length(s_len, hdr);
return write(file, hdr, 2) < 2 ||
write(file, s, s_len) < s_len;
}
#define MAX_PAM_SERVICE_NAME 1024
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