Ethereum Keyfile
A library for handling the encrypted keyfiles used to store ethereum private keys
This library and repository was previously located at https://github.com/pipermerriam/ethereum-keyfile. It was transferred to the Ethereum foundation github in November 2017 and renamed to
eth-keyfile. The PyPi package was also renamed fromethereum-keyfiletoeth-keyfile.
Installation
pip install eth-keyfileDevelopment
pip install -e .[dev]Running the tests
You can run the tests with:
py.test testsOr you can install tox to run the full test suite.
Releasing
Pandoc is required for transforming the markdown README to the proper format to render correctly on pypi.
For Debian-like systems:
apt install pandoc
Or on OSX:
brew install pandocTo release a new version:
make release bump=$$VERSION_PART_TO_BUMP$$How to bumpversion
The version format for this repo is {major}.{minor}.{patch} for stable, and
{major}.{minor}.{patch}-{stage}.{devnum} for unstable (stage can be alpha or beta).
To issue the next version in line, specify which part to bump,
like make release bump=minor or make release bump=devnum.
If you are in a beta version, make release bump=stage will switch to a stable.
To issue an unstable version when the current version is stable, specify the
new version explicitly, like make release bump="--new-version 2.0.0-alpha.1 devnum"
Documentation
eth_keyfile.load_keyfile(path_or_file_obj) --> keyfile_json
Takes either a filesystem path represented as a string or a file object and returns the parsed keyfile json as a python dictionary.
>>> from eth_keyfile import load_keyfile
>>> load_keyfile('path/to-my-keystore/keystore.json')
{
"crypto" : {
"cipher" : "aes-128-ctr",
"cipherparams" : {
"iv" : "6087dab2f9fdbbfaddc31a909735c1e6"
},
"ciphertext" : "5318b4d5bcd28de64ee5559e671353e16f075ecae9f99c7a79a38af5f869aa46",
"kdf" : "pbkdf2",
"kdfparams" : {
"c" : 262144,
"dklen" : 32,
"prf" : "hmac-sha256",
"salt" : "ae3cd4e7013836a3df6bd7241b12db061dbe2c6785853cce422d148a624ce0bd"
},
"mac" : "517ead924a9d0dc3124507e3393d175ce3ff7c1e96529c6c555ce9e51205e9b2"
},
"id" : "3198bc9c-6672-5ab3-d995-4942343ae5b6",
"version" : 3
}eth_keyfile.create_keyfile_json(private_key, password, kdf="pbkdf2", work_factor=None, salt_size=16) --> keyfile_json
Takes the following parameters:
private_key: A bytestring of length 32password: A bytestring which will be the password that can be used to decrypt the resulting keyfile.kdf: The key derivation function. Allowed values arepbkdf2andscrypt. By default,pbkdf2will be used.work_factor: The work factor which will be used for the given key derivation function. By default1000000will be used forpbkdf2and262144forscrypt.salt_size: Salt size in bytes.
Returns the keyfile json as a python dictionary.
>>> private_key = b'\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01'
>>> create_keyfile_json(private_key, b'foo')
{
"address" : "1a642f0e3c3af545e7acbd38b07251b3990914f1",
"crypto" : {
"cipher" : "aes-128-ctr",
"cipherparams" : {
"iv" : "6087dab2f9fdbbfaddc31a909735c1e6"
},
"ciphertext" : "5318b4d5bcd28de64ee5559e671353e16f075ecae9f99c7a79a38af5f869aa46",
"kdf" : "pbkdf2",
"kdfparams" : {
"c" : 262144,
"dklen" : 32,
"prf" : "hmac-sha256",
"salt" : "ae3cd4e7013836a3df6bd7241b12db061dbe2c6785853cce422d148a624ce0bd"
},
"mac" : "517ead924a9d0dc3124507e3393d175ce3ff7c1e96529c6c555ce9e51205e9b2"
},
"id" : "3198bc9c-6672-5ab3-d995-4942343ae5b6",
"version" : 3
}eth_keyfile.decode_keyfile_json(keyfile_json, password) --> private_key
Takes the keyfile json as a python dictionary and the password for the keyfile, returning the decoded private key.
>>> keyfile_json = {
... "crypto" : {
... "cipher" : "aes-128-ctr",
... "cipherparams" : {
... "iv" : "6087dab2f9fdbbfaddc31a909735c1e6"
... },
... "ciphertext" : "5318b4d5bcd28de64ee5559e671353e16f075ecae9f99c7a79a38af5f869aa46",
... "kdf" : "pbkdf2",
... "kdfparams" : {
... "c" : 262144,
... "dklen" : 32,
... "prf" : "hmac-sha256",
... "salt" : "ae3cd4e7013836a3df6bd7241b12db061dbe2c6785853cce422d148a624ce0bd"
... },
... "mac" : "517ead924a9d0dc3124507e3393d175ce3ff7c1e96529c6c555ce9e51205e9b2"
... },
... "id" : "3198bc9c-6672-5ab3-d995-4942343ae5b6",
... "version" : 3
... }
>>> decode_keyfile_json(keyfile_json, b'foo')
b'\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01'eth_keyfile.extract_key_from_keyfile(path_or_file_obj, password) --> private_key
Takes a filesystem path represented by a string or a file object and the password for the keyfile. Returns the private key as a bytestring.
>>> extract_key_from_keyfile('path/to-my-keystore/keyfile.json', b'foo')
b'\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01'