dpaste

A simple pastebin for light values (max 64KB) using OpenDHT distributed hash table.

Example

Let a file A.md you want to share.

$ dpaste < A.md
DPASTE: Pasting data...
dpaste:74236E62

You can share this PIN (one can omit the string dpaste:). It is used to retrieve the pasted file within 10 minutes by simply doing:

$ dpaste -g dpaste:74236E62

Encryption

One can encrypt his document using the option --aes-encrypt or --gpg-encrypt -r {recipient}. In the former case, AES-GCM is used and in the latter it is simple GPG encryption. One can also sign-then-encrypt his message by adding the flag -s (a working gpg configuration needs to be found on the system). If both --aes-encrypt and --gpg-encrypt (or -s) options are present, aes encryption method is used.

AES

When using --aes-encrypt, dpaste will generate a random 32-bit passphrase which will then be stretched using argon2 crypto library. This is all handled by OpenDHT crypto layer. After pasting the blob, the returned PIN will be 64 bits long instead of the classic 32 bits. Indeed, the generated 32-bit password is appended to the location code used to index on the DHT. For e.g.:

$ dpaste --aes-encrypt < ${some_file}
DPASTE: Encrypting (aes-gcm) data...
DPASTE: Pasting data...
dpaste:B79F2F91C811D5DC

Therefore, the blob will be pasted on HASH("B79F2F91") and encrypted with a key derived from the passphrase C811D5DC.

How to build

Assuming you have the installed the project dependencies prior to this, you can either use CMake or GNU Autotools to build. A c++17 compliant compiler is required to compile the program.

Using GNU Autotools

$ ./autogen.sh
$ ./configure
$ make

You'll then find the binary under src/ directory.

Using CMake

$ mkdir build && cd build
$ cmake ..
$ make

You'll then find the binary dpaste under build directory.

Package

Archlinux AUR: https://aur.archlinux.org/packages/dpaste/

Milis Linux: mps kur dpaste (https://github.com/milisarge/malfs-milis/blob/master/talimatname/genel/dpaste/talimat)

Dependencies

• OpenDHT (minimal version: 1.2.0)
• msgpack-c
• gpgmepp
• json.hpp (required version for CMake: 2.1.1)
• cURLpp (minimal version: 0.8.1)
• glibmm
• libb64
• Getopt
• catch for unit tests

Pastebin over DHT

A DHT is efficient and requires no infrastructure. In practice, you can always count on the network to host your data for you since a distributed network is not likely to be "down".

Roadmap

• Add support for values with size greater than 64KiB (splitting values across multiple locations, see #17);
• Support for multi-lingual interface (--help, info/debug messages, see #18);
• Support for longer paste life time (OpenDHT's default is 10 minutes, see #19);
• Switch from the currently used small python REST API server script to OpenDHT's proxy (see #20);
• Improve the logging code (with dedicated library?);
• Password based encryption (AES using gnutls);
• Add user configuration file system;
• Support RSA encrypt/sign using user's GPG key;
• Support running the DHT node as service for executing dpaste operations.

Author

• Simon Désaulniers [email protected]
• Adrien Béraud [email protected]