A library for handling the encrypted keyfiles used to store ethereum private keys.
Project description
A library for handling the encrypted keyfiles used to store ethereum private keys
Installation
pip install ethereum-keyfile
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) --> keyfile_json
Takes the following parameters:
private_key: A bytestring of length 32
password: A bytestring which will be the password that can be used to decrypt the resulting keyfile.
kdf: The key derivation function. Allowed values are pbkdf2 and scrypt. By default, pbkdf2 will be used.
work_factor: The work factor which will be used for the given key derivation function. By default 1000000 will be used for pbkdf2 and 262144 for scrypt.
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')
{
"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'
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