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/*
integrit - file integrity verification system
Copyright (C) 2000, 2001, 2002 Ed L. Cashin
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; either version 2
of the License, or (at your option) any later version.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <limits.h>
#include <errno.h>
/* support platforms that don't yet conform to C99 */
#if HAVE_STDINT_H
#include <stdint.h>
#elif HAVE_INTTYPES_H
#include <inttypes.h>
#else
#error No stdint.h or inttypes.h found.
#endif
#include "gnupg/sha1.h"
#include "cdb.h"
#include "cdb_make.h"
#include "cdb_seq.h"
#include "hashtbl/hashtbl.h"
#include "integrit.h"
#include "elcerror.h"
#include "missing.h"
#include "xml.h"
#include "missing_p.h"
#include "elcerror_p.h"
#include "xml_p.h"
#include "dbinfo.h"
#include "show.h"
#ifdef ELC_FIND_LEAKS
#include "leakfind.h"
#endif
static void print_missing_xml(FILE *out, integrit_t *it,
const char *key, size_t klen)
{
XML_START_PRINT(out, "missing");
for (; klen--; ++key)
xml_putc(out, *key);
XML_END_PRINT(out, "missing");
putc('\n', out);
}
inline static void announce_missing(const char *s, size_t n, FILE *out)
{
fputs("missing: ", out);
while (n--)
putc(*s++, out);
fputs(" ", out);
}
static void print_missing_lines(FILE *out, integrit_t *it,
const char *key, size_t klen,
const dbinfo *dbinf, size_t vlen)
{
const struct stat *s = &dbinf->stat;
announce_missing(key, klen, out);
/* show some interesting information about the missing file: pugzm */
if (S_ISLNK(s->st_mode)) /* for a symlink ... */
fputs("p(sym) ", out); /* display "sym" instead of "777" */
else
show_octal(out, 'p', s->st_mode & PERM_MASK);
show_long(out, 'u', s->st_uid);
show_long(out, 'g', s->st_gid);
show_long(out, 'z', s->st_size);
show_time(out, 'm', s->st_mtime);
if (vlen == sizeof(dbinfo)) { /* if there's a checksum */
putc('\n', out);
announce_missing(key, klen, out);
show_checksum(out, dbinf->sum, sizeof(dbinf->sum));
}
putc('\n', out);
}
static void do_currdb_check(integrit_t *it, struct cdb *curr_cdb,
char *key, size_t klen,
dbinfo *dbinf, size_t vlen)
{
int ret;
if ( (ret = cdb_find(curr_cdb, key, klen)) == -1)
die(__FUNCTION__,
"Error: looking up file (%s) in current-state database (%s): %s",
key, it->currdbname, strerror(errno));
else if (! ret) {
if (it->output == OUTPUT_XML)
print_missing_xml(stdout, it, key, klen);
else
print_missing_lines(stdout, it, key, klen, dbinf, vlen);
}
}
/* based on open_known_cdb in main.c */
void open_current_state_cdb(const char *dbname, struct cdb *curr_cdb)
{
int fd = open(dbname, O_RDONLY | O_NDELAY);
if (fd == -1)
die(__FUNCTION__, "Error: opening current-state database (%s): %s",
dbname, strerror(errno));
cdb_init(curr_cdb, fd);
}
void check_for_missing(integrit_t *it)
{
cdb_seq knownseq;
struct cdb curr_cdb;
int err;
unsigned ksiz = 1024; /* beginning key space allotment */
char *key = malloc(ksiz);
dbinfo dbinf;
size_t klen, vlen;
if (! key)
DIE("malloc key");
open_current_state_cdb(it->currdbname, &curr_cdb);
if ((it->verbose > 0)
&& (it->output != OUTPUT_XML))
puts(PROGNAME ": checking for missing files --------------");
knownseq.fd = it->knowndb.fd;
if (cdb_seq_start(&knownseq) == -1)
DIE("cdb_seq_start");
while (! cdb_seq_eod(&knownseq)) { /* while not end of data */
if ( (err = cdb_seq_sizes(&knownseq, &klen, &vlen)) == -1)
DIE("cdb_seq_sizes");
else if (err == 1) /* no more in db sequence */
break;
while (klen > ksiz) {
if (ksiz > (UINT_MAX / 2)) /* guard against overflow */
DIE("key size too big");
ksiz *= 2;
if (! (key = realloc(key, ksiz)) )
DIE("realloc key");
}
if (cdb_seq_get(&knownseq, key, klen, &dbinf, vlen) == -1)
DIE("cdb_seq_getkey");
do_currdb_check(it, &curr_cdb, key, klen, &dbinf, vlen);
}
free(key);
}
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