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.
Read more in the documentation below. View the change log.
python -m pip install eth-keyfileTakes 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
}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'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'If you would like to hack on eth-keyfile, please check out the Snake Charmers Tactical Manual for information on how we do:
- Testing
- Pull Requests
- Documentation
We use pre-commit to maintain consistent code style. Once
installed, it will run automatically with every commit. You can also run it manually
with make lint. If you need to make a commit that skips the pre-commit checks, you
can do so with git commit --no-verify.
You can set up your dev environment with:
git clone [email protected]:ethereum/eth-keyfile.git
cd eth-keyfile
virtualenv -p python3 venv
. venv/bin/activate
python -m pip install -e ".[dev]"
pre-commit installTo release a new version:
make release bump=$$VERSION_PART_TO_BUMP$$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. This is typically done from the
main branch, except when releasing a beta (in which case the beta is released from main,
and the previous stable branch is released from said branch).
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 4.0.0-alpha.1 devnum"
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