ethereum-keyfile 0.1.0

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'