Python ecdsa_raw_recover Examples

Example #1

File: precompile.py Project: gitter-badger/py-evm

def precompile_ecrecover(computation):
    computation.gas_meter.consume_gas(constants.GAS_ECRECOVER, reason="ECRecover Precompile")
    raw_message_hash = computation.msg.data[:32]
    message_hash = pad32r(raw_message_hash)

    v_bytes = pad32r(computation.msg.data[32:64])
    v = big_endian_to_int(v_bytes)

    r_bytes = pad32r(computation.msg.data[64:96])
    r = big_endian_to_int(r_bytes)

    s_bytes = pad32r(computation.msg.data[96:128])
    s = big_endian_to_int(s_bytes)

    try:
        validate_lt_secpk1n(r)
        validate_lt_secpk1n(s)
        validate_lte(v, 28)
        validate_gte(v, 27)
    except ValidationError:
        return computation

    try:
        raw_public_key = ecdsa_raw_recover(message_hash, (v, r, s))
    except ValueError:
        return computation

    public_key = encode_raw_public_key(raw_public_key)
    address = public_key_to_address(public_key)
    padded_address = pad32(address)

    computation.output = padded_address
    return computation

Example #2

File: test_ecdsa_utils.py Project: smatthewenglish/py-evm

def test_raw_recover():
    raw_public_key = ecdsa_raw_recover(MSG_HASH, (V, R, S))
    recovered_public_key = encode_raw_public_key(raw_public_key)
    assert recovered_public_key == PUBLIC_KEY

Example #3

 def ecdsa_raw_recover(self, msg_hash, vrs):
     return ecdsa_raw_recover(msg_hash, vrs)