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using Dino.Entities;
namespace Dino.Plugins.OpenPgp {
public class PgpFileDecryptor : FileDecryptor, Object {
public FileReceiveData prepare_get_meta_info(Conversation conversation, FileTransfer file_transfer, FileReceiveData receive_data) {
return receive_data;
}
public FileMeta prepare_download_file(Conversation conversation, FileTransfer file_transfer, FileReceiveData receive_data, FileMeta file_meta) {
return file_meta;
}
public bool can_decrypt_file(Conversation conversation, FileTransfer file_transfer, FileReceiveData receive_data) {
return file_transfer.file_name.has_suffix("pgp") || file_transfer.mime_type == "application/pgp-encrypted";
}
public async InputStream decrypt_file(InputStream encrypted_stream, Conversation conversation, FileTransfer file_transfer, FileReceiveData receive_data) throws FileReceiveError {
try {
uint8[] buf = new uint8[256];
ByteArray data = new ByteArray();
size_t len = -1;
do {
len = yield encrypted_stream.read_async(buf);
data.append(buf[0:len]);
} while(len > 0);
GPGHelper.DecryptedData clear_data = GPGHelper.decrypt_data(data.data);
file_transfer.encryption = Encryption.PGP;
if (clear_data.filename != null && clear_data.filename != "") {
debug("Decrypting file %s from %s", clear_data.filename, file_transfer.file_name);
file_transfer.file_name = clear_data.filename;
} else if (file_transfer.file_name.has_suffix(".pgp")) {
debug("Decrypting file %s from %s", file_transfer.file_name.substring(0, file_transfer.file_name.length - 4), file_transfer.file_name);
file_transfer.file_name = file_transfer.file_name.substring(0, file_transfer.file_name.length - 4);
}
return new MemoryInputStream.from_data(clear_data.data, GLib.free);
} catch (Error e) {
throw new FileReceiveError.DECRYPTION_FAILED("PGP file decryption error: %s".printf(e.message));
}
}
}
}
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