On Fri, Jan 10, 2014 at 04:13:29AM -0800, gwen hastings wrote:
From the README...
DESCRIPTION
Pretty Curved Privacy (pcp1) is a commandline utility which can be used to encrypt files. pcp1 uses eliptc curve cryptography for encryption (CURVE25519 by Dan J. Bernstein). While CURVE25519 is no worldwide accepted standard it hasn't been compromised by the NSA - which might be better, depending on your point of view.
sounds like my pbp: https://github.com/stef/pbp except with a 'c' and less features, from the readme: v0.2 - experimental PBP[0] is a simple python wrapper and a command line interface around libsodium, to provide basic functionality resembling PGP. It uses scrypt for a KDF and a much simpler packet format, which should be much harder to fingerprint, pbp also provides an experimental forward secrecy mode and a multi-party DH mode. Installation pip install pbp you possibly need to run (or an equivalent command) sudo apt-get install git python-virtualenv gcc python-dev libffi-dev to satisfy all basic dependencies. Design goals: 1. use modern crypto 2. provide similar functionality to PGP 3. be extensible 4. difficult to identify based on fingerprinting 5. provide extensive testing 6. strive for security Crypto Cryptographic primitives are based on the NaCl library from http://nacl.cr.yp.to. The KDF used is scrypt. PGP-like Provides basic public key encrypt/decrypt, sign/verify and secret key encrypt/decrypt modes, as well as the ability to sign, verify, list, generate, export and import keys. Extensibility using pbp and the underlying pysodium[1] library it's easy to extend pbp. Some examples are the experimental forward secrecy mode (see description in docs/chaining-dh.txt), the support for ECDH key exchanges from the command-line and generation of arbitrarily large random byte streams. [1] https://github.com/stef/pysodium also available on https://pypi.python.org/pypi/pysodium Fingerprinting pbp tries to avoid to store any sensitive plaintext info, the encrypted files all should look like random noise. for a description of the packet formats see docs/fileformats.txt. Testing All py files come with their internal tests, unit tests are in tests.py, and commandline functionality is tested in test.sh. Security pbp locks the process memory, so it cannot be swapped to disk. Also pbp uses SecureString[2] to overwrite sensitive key material after usage in memory, so keys have a short window of opportunity to leak. [2] https://github.com/dnet/pysecstr Usage Generate a key pbp -g -n alice sending howdy.txt using public key encryption from alice to bob pbp -c -S alice -r bob -i howdy.txt decrypt an encrypted file using public key crypto pbp -d -S bob -i howdy.txt.pbp sending howdy.txt using secret key encryption pbp -c -i howdy.txt decrypt an encrypted file using secret key crypto pbp -d -i howdy.txt.pbp sign howdy.txt pbp -s -S alice -i /howdy.txt verify howdy.txt pbp -v -i howdy.txt.sig sign bobs key pbp -m -S alice -n bob check sigs on carols key pbp -C -n carol alice encrypts howdy.txt to bob using experimental forward secret mode pbp -e -S alice -r bob -i howdy.txt -o ./secret-message bob decrypts howdy.txt from alice using experimental forward secret mode pbp -E -S bob -r alice -i ./secret-message initiate ECDH key exchange pbp -D1 respond to ECDH key exchange pbp -D2 -Dp 'public component from D1' finish ECDH key exchange pbp -D3 -Dp 'public component from D2' -De 'secret exponent from D1' random streaming 23GByte of cryptographic randomness pbp -R -Rs 23G -o /mnt/huge_fs/random_data participate in a 4-way DH exchange, 1st message pbp -Ds -Dp 4 -S alice -n 'friends001' -i oldkeychain -o newkeychain participate in a 4-way DH exchange, 2nd message pbp -De -S alice -n 'friends001' -i oldkeychain -o newkeychain this is one big pipe that creates a 3-way ECDH secret between alice, bob and carol: pbp -Ds -S alice -Dp 3 -n 'test-dh' -i /dev/null | pbp -Ds -S bob -Dp 3 -n 'test-dh' | pbp -Ds -S carol -Dp 3 -n 'test-dh' | pbp -De -S alice -Dp 3 -n 'test-dh' | pbp -De -S bob -Dp 3 -n 'test-dh' of course instead of a pipe you could use any kind of transport mechanism (c) 2013, stf <s@ctrlc.hu>, dnet vsza@vsza.hu, AGPLv3.0+ [0] also it's very funny to say pbp with a mouth full of dry cookies. don't try this in company! -- pgp: https://www.ctrlc.hu/~stef/stef.gpg pgp fp: FD52 DABD 5224 7F9C 63C6 3C12 FC97 D29F CA05 57EF otr fp: https://www.ctrlc.hu/~stef/otr.txt