bool readV4Config( const char *configFile,
EncfsConfig &config, ConfigInfo *)
{
bool ok = false;
// use Config to parse the file and query it..
ConfigReader cfgRdr;
if(cfgRdr.load( configFile ))
{
try
{
cfgRdr["cipher"] >> (*config.mutable_cipher());
int blockSize;
cfgRdr["blockSize"] >> blockSize;
config.set_block_size(blockSize);
EncryptedKey *key = config.mutable_key();
cfgRdr["keyData"] >> (*key->mutable_ciphertext());
// fill in default for V4
config.mutable_naming()->MergeFrom( makeInterface("nameio/stream", 1, 0, 0) );
config.set_creator( "EncFS 1.0.x" );
ok = true;
} catch( Error &err)
{
LOG(WARNING) << "Error parsing config file " << configFile
<< ": " << err.what();
ok = false;
}
}
return ok;
}
// Read a v5 archive, which is a proprietary binary format.
bool readV5Config( const char *configFile,
EncfsConfig &config, ConfigInfo *)
{
bool ok = false;
// use Config to parse the file and query it..
ConfigReader cfgRdr;
if(cfgRdr.load( configFile ))
{
try
{
config.set_revision(cfgRdr["subVersion"].readInt(0));
if(config.revision() > V5Latest)
{
/* config file specifies a version outside our supported
range.. */
LOG(ERROR) << "Config subversion " << config.revision()
<< " found, but this version of encfs only supports up to version "
<< V5Latest;
return false;
}
if( config.revision() < V5Latest )
{
LOG(ERROR) << "This version of EncFS doesn't support "
<< "filesystems created with EncFS releases before 2004-08-13";
return false;
}
cfgRdr["creator"] >> (*config.mutable_creator());
cfgRdr["cipher"] >> (*config.mutable_cipher());
cfgRdr["naming"] >> (*config.mutable_naming());
int blockSize;
cfgRdr["blockSize"] >> blockSize;
config.set_block_size(blockSize);
EncryptedKey *encryptedKey = config.mutable_key();
int keySize;
cfgRdr["keySize"] >> keySize;
encryptedKey->set_size(keySize / 8);
cfgRdr["keyData"] >> (*encryptedKey->mutable_ciphertext());
config.set_unique_iv( cfgRdr["uniqueIV"].readBool( false ) );
config.set_chained_iv( cfgRdr["chainedIV"].readBool( false ) );
config.set_external_iv( cfgRdr["externalIV"].readBool( false ) );
config.set_block_mac_bytes( cfgRdr["blockMACBytes"].readInt(0) );
config.set_block_mac_rand_bytes( cfgRdr["blockMACRandBytes"].readInt(0) );
ok = true;
} catch( Error &err)
{
LOG(WARNING) << "Error parsing data in config file " << configFile
<< "; " << err.what();
ok = false;
}
}
return ok;
}