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/*
* rsyncrypto - an rsync friendly encryption
* Copyright (C) 2005-2008 Shachar Shemesh for Lingnu Open Source Consulting ltd.
*
* 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
*
* In addition, as a special exception, the rsyncrypto authors give permission
* to link the code of this program with the OpenSSL library (or with modified
* versions of OpenSSL that use the same license as OpenSSL), and distribute
* linked combinations including the two. You must obey the GNU General Public
* License in all respects for all of the code used other than OpenSSL. If you
* modify this file, you may extend this exception to your version of the file,
* but you are not obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*
* The project's homepage is at http://rsyncrypto.lingnu.com/
*/
#include <precomp.h>
#include "rsyncrypto.h"
#include "file.h"
#include "crypto.h"
#include "argtable2.h"
#include "filemap.h"
std::unique_ptr<std::ostream> changes_log;
void version()
{
printf("%s by Shachar Shemesh\n", PACKAGE_STRING);
printf("This program was developed as part of Lingnu Open Source Consulting's online\n"
"backup service. For further details check out http://www.lingnu.com\n");
}
void usage()
{
fprintf(stderr, "%s ", PACKAGE_STRING );
arg_print_syntax(stderr, options.argtable, "\n\n");
arg_print_glossary(stderr, options.argtable, "%-22s %s\n");
exit(0);
}
startup_options options;
void parse_cmdline( int argc, char *argv[] )
{
int nerrors=arg_parse( argc, argv, options.argtable );
if( nerrors!=0 ) {
if( !EXISTS(version) && !EXISTS(help) ) {
std::cerr<<"Incorrect arguments"<<std::endl;
usage();
} else {
// Do not complain about missing arguments if the user asked for --help or --version
return;
}
}
if( EXISTS(trim) && !EXISTS(recurse) && !EXISTS(filelist) )
throw rscerror("Cannot trim names when not doing directory recursion or filelist");
if( EXISTS(nameenc) && !EXISTS(recurse) && !EXISTS(filelist) )
throw rscerror("Cannot encrypt names when not doing directory recursion or filelist");
if( EXISTS(delkey) )
ARG(del).count=1;
// Some sanity check of the options
if( EXISTS(decrypt) ) {
if( EXISTS(keysize) )
throw rscerror("Cannot specify key size for decryption");
if( EXISTS(fr) || EXISTS(fk) )
throw rscerror("\"force\" options incompatible with -d option");
if( strcmp(FILENAME(src), "-")==0 && !EXISTS(filelist) ) {
// Plaintext file is standard input/output
if( !EXISTS(noarch) ) {
throw rscerror("Must use \"--no-archive-mode\" if plaintext file is stdin");
}
}
if( EXISTS(export_changes) ) {
throw rscerror("Log export not supported in decrypt mode");
}
}
// Apply default values
if( !EXISTS(rollsens) )
VAL(rollsens)=VAL(rollmin);
if( !EXISTS(noatime) )
VAL(noatime)=1;
if( !EXISTS(mod_win) )
VAL(mod_win)=0;
}
int main( int argc, char *argv[] )
{
int ret=0;
ERR_load_crypto_strings();
try {
parse_cmdline( argc, argv );
if( EXISTS(version) ) {
version();
exit(0);
}
if( EXISTS(help) )
usage();
#if HAVE_NOATIME
// Sometimes we can always use O_NOATIME without a problem
if( VAL(noatime)==1 && geteuid()==0 ) {
// We are root - O_NOATIME will succeed anyways
VAL(noatime)=2;
}
#endif
RSA *rsa_key=extract_private_key(FILENAME(master));
if( rsa_key==NULL ) {
rsa_key=extract_public_key(FILENAME(master));
if( rsa_key==NULL ) {
throw rscerror( "Couldn't parse RSA key", 0, FILENAME(master) );
}
}
if( EXISTS(export_changes) ) {
changes_log=std::unique_ptr<std::ofstream>(new std::ofstream(FILENAME(export_changes), std::ofstream::trunc));
}
const char *opname=NULL;
encryptfunc op;
namefunc srcnameop=name_concat, dstnameop=name_concat, keynameop=name_concat;
prefix_func prefix_op=cond_name_concat;
bool encrypt=true;
if( EXISTS(decrypt) ) {
op=file_decrypt;
prefix_op=left_only_concat;
opname="Decrypting";
encrypt=false;
} else {
op=file_encrypt;
opname="Encrypting";
}
if( EXISTS(nameenc) ) {
if( encrypt ) {
dstnameop=filemap::namecat_encrypt;
keynameop=dstnameop;
} else {
if( EXISTS(recurse) || EXISTS(filelist) ) {
// First decrypt the encrypted file map
file_decrypt(autofd::combine_paths(FILENAME(src), FILEMAPNAME).c_str(),
FILENAME(nameenc), autofd::combine_paths(FILENAME(key),
FILEMAPNAME).c_str(), rsa_key, NULL );
}
dstnameop=filemap::namecat_decrypt;
}
filemap::fill_map(FILENAME(nameenc), encrypt);
}
if( EXISTS(recurse) || EXISTS(filelist) ) {
if( EXISTS(filelist) )
filelist_encrypt( FILENAME(src), FILENAME(dst), FILENAME(key), rsa_key, op, opname,
prefix_op, srcnameop, dstnameop, keynameop);
else
dir_encrypt(FILENAME(src), FILENAME(dst), FILENAME(key), rsa_key, op, opname,
dstnameop, keynameop);
if( encrypt && EXISTS(nameenc) ) {
// Write the (possibly changed) filelist back to the file
filemap::write_map(FILENAME(nameenc));
// Encrypt the filelist file itself
file_encrypt(FILENAME(nameenc), autofd::combine_paths(FILENAME(dst), FILEMAPNAME).
c_str(), autofd::combine_paths(FILENAME(key), FILEMAPNAME).c_str(), rsa_key,
NULL );
}
} else {
struct stat status, *pstat=&status;
if( strcmp( FILENAME(src), "-" )!=0 ) {
status=autofd::stat(FILENAME(src));
} else
pstat=NULL;
op( FILENAME(src), FILENAME(dst), FILENAME(key), rsa_key, pstat );
}
} catch( const rscerror &err ) {
std::cerr<<err.error()<<std::endl;
ret=1;
}
return ret;
}
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