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* Problem: Source files contain no license info Solution: Add comments with SPDX license info to source files * Python 3 files don't need # -*- coding: utf-8 -*-
51 lines
1.8 KiB
Python
51 lines
1.8 KiB
Python
# Copyright BigchainDB GmbH and BigchainDB contributors
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# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
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# Code is Apache-2.0 and docs are CC-BY-4.0
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# Separate all crypto code so that we can easily test several implementations
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from collections import namedtuple
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import sha3
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from cryptoconditions import crypto
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CryptoKeypair = namedtuple('CryptoKeypair', ('private_key', 'public_key'))
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def hash_data(data):
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"""Hash the provided data using SHA3-256"""
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return sha3.sha3_256(data.encode()).hexdigest()
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def generate_key_pair():
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"""Generates a cryptographic key pair.
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Returns:
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:class:`~bigchaindb.common.crypto.CryptoKeypair`: A
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:obj:`collections.namedtuple` with named fields
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:attr:`~bigchaindb.common.crypto.CryptoKeypair.private_key` and
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:attr:`~bigchaindb.common.crypto.CryptoKeypair.public_key`.
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"""
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# TODO FOR CC: Adjust interface so that this function becomes unnecessary
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return CryptoKeypair(
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*(k.decode() for k in crypto.ed25519_generate_key_pair()))
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PrivateKey = crypto.Ed25519SigningKey
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PublicKey = crypto.Ed25519VerifyingKey
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def key_pair_from_ed25519_key(hex_private_key):
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"""Generate base58 encode public-private key pair from a hex encoded private key"""
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priv_key = crypto.Ed25519SigningKey(bytes.fromhex(hex_private_key)[:32], encoding='bytes')
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public_key = priv_key.get_verifying_key()
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return CryptoKeypair(private_key=priv_key.encode(encoding='base58').decode('utf-8'),
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public_key=public_key.encode(encoding='base58').decode('utf-8'))
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def public_key_from_ed25519_key(hex_public_key):
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"""Generate base58 public key from hex encoded public key"""
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public_key = crypto.Ed25519VerifyingKey(bytes.fromhex(hex_public_key), encoding='bytes')
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return public_key.encode(encoding='base58').decode('utf-8')
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