131 lines
3.2 KiB
C
131 lines
3.2 KiB
C
/*
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* Copyright (C) 2013-2022 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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* Copyright (C) 2007-2013 Sourcefire, Inc.
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*
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* Authors: Nigel Horne
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include "clamav.h"
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#if HAVE_CONFIG_H
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#include "clamav-config.h"
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <stdio.h>
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#include <memory.h>
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#include <sys/stat.h>
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#include "others.h"
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#include "str.h"
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#include "mbox.h"
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#include "uuencode.h"
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/* Maximum line length according to RFC821 */
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#define RFC2821LENGTH 1000
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int cli_uuencode(const char *dir, fmap_t *map)
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{
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message *m;
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char buffer[RFC2821LENGTH + 1];
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size_t at = 0;
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if (!fmap_gets(map, buffer, &at, sizeof(buffer) - 1)) {
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/* empty message */
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return CL_CLEAN;
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}
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if (!isuuencodebegin(buffer)) {
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cli_dbgmsg("Message is not in uuencoded format\n");
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return CL_EFORMAT;
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}
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m = messageCreate();
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if (m == NULL) {
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return CL_EMEM;
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}
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cli_dbgmsg("found uuencode file\n");
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if (uudecodeFile(m, buffer, dir, map, &at) < 0) {
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messageDestroy(m);
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cli_dbgmsg("Message is not in uuencoded format\n");
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return CL_EFORMAT;
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}
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messageDestroy(m);
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return CL_CLEAN; /* a lie - but it gets things going */
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}
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/*
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* Save the uuencoded part of the file as it is read in since there's no need
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* to include it in the parse tree. Saves memory and parse time.
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* Return < 0 for failure
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*/
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int uudecodeFile(message *m, const char *firstline, const char *dir, fmap_t *map, size_t *at)
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{
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fileblob *fb;
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char buffer[RFC2821LENGTH + 1];
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char *filename = cli_strtok(firstline, 2, " ");
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if (filename == NULL)
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return -1;
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fb = fileblobCreate();
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if (fb == NULL) {
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free(filename);
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return -1;
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}
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fileblobSetFilename(fb, dir, filename);
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cli_dbgmsg("uudecode %s\n", filename);
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free(filename);
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while (fmap_gets(map, buffer, at, sizeof(buffer) - 1)) {
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unsigned char data[1024];
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const unsigned char *uptr;
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size_t len;
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cli_chomp(buffer);
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if (strcasecmp(buffer, "end") == 0)
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break;
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if (buffer[0] == '\0')
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break;
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uptr = decodeLine(m, UUENCODE, buffer, data, sizeof(data));
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if (uptr == NULL)
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break;
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len = (size_t)(uptr - data);
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if ((len > 62) || (len == 0))
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break;
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if (fileblobAddData(fb, data, len) < 0)
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break;
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}
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fileblobDestroy(fb);
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return 1;
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}
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