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/*
* Copyright (C) 2015 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
* Copyright (C) 2007-2008 Sourcefire, Inc.
*
* Authors: Nigel Horne
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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 02110-1301, USA.
*/
#include "clamav.h"
#if HAVE_CONFIG_H
#include "clamav-config.h"
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdio.h>
#include <memory.h>
#include <sys/stat.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#include "others.h"
#include "str.h"
#include "mbox.h"
#include "uuencode.h"
/* Maximum line length according to RFC821 */
#define RFC2821LENGTH 1000
int
cli_uuencode(const char *dir, fmap_t *map)
{
message *m;
char buffer[RFC2821LENGTH + 1];
size_t at = 0;
if(!fmap_gets(map, buffer, &at, sizeof(buffer) - 1)) {
/* empty message */
return CL_CLEAN;
}
if(!isuuencodebegin(buffer)) {
cli_dbgmsg("Message is not in uuencoded format\n");
return CL_EFORMAT;
}
m = messageCreate();
if(m == NULL) {
return CL_EMEM;
}
cli_dbgmsg("found uuencode file\n");
if(uudecodeFile(m, buffer, dir, map, &at) < 0) {
messageDestroy(m);
cli_dbgmsg("Message is not in uuencoded format\n");
return CL_EFORMAT;
}
messageDestroy(m);
return CL_CLEAN; /* a lie - but it gets things going */
}
/*
* Save the uuencoded part of the file as it is read in since there's no need
* to include it in the parse tree. Saves memory and parse time.
* Return < 0 for failure
*/
int
uudecodeFile(message *m, const char *firstline, const char *dir, fmap_t *map, size_t *at)
{
fileblob *fb;
char buffer[RFC2821LENGTH + 1];
char *filename = cli_strtok(firstline, 2, " ");
if(filename == NULL)
return -1;
fb = fileblobCreate();
if(fb == NULL) {
free(filename);
return -1;
}
fileblobSetFilename(fb, dir, filename);
cli_dbgmsg("uudecode %s\n", filename);
free(filename);
while(fmap_gets(map, buffer, at, sizeof(buffer) - 1)) {
unsigned char data[1024];
const unsigned char *uptr;
size_t len;
cli_chomp(buffer);
if(strcasecmp(buffer, "end") == 0)
break;
if(buffer[0] == '\0')
break;
uptr = decodeLine(m, UUENCODE, buffer, data, sizeof(data));
if(uptr == NULL)
break;
len = (size_t)(uptr - data);
if((len > 62) || (len == 0))
break;
if(fileblobAddData(fb, data, len) < 0)
break;
}
fileblobDestroy(fb);
return 1;
}
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