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| import os | |
| import hashlib | |
| import elliptic | |
| import base58 | |
| from binascii import unhexlify as decode_hex | |
| from binascii import hexlify | |
| # Constants | |
| n = 115792089237316195423570985008687907852837564279074904382605163141518161494337 | |
| generator = ( | |
| 55066263022277343669578718895168534326250603453777594175500187360389116729240, | |
| 32670510020758816978083085130507043184471273380659243275938904335757337482424 | |
| ) | |
| # Generates base58 bitcoin addresses from public key and prefix. | |
| def generate_base58_format(payload, prefix): | |
| hash256 = hashlib.sha256(decode_hex(prefix + payload)).hexdigest() | |
| checksum = hashlib.sha256(decode_hex(hash256)).hexdigest() | |
| checksum = checksum[:8] | |
| formatted_key = prefix + payload + checksum | |
| return base58.b58encode(decode_hex(formatted_key)) | |
| # 1. Generate randomness and hash it with sha256 algorithm. | |
| private_key = None | |
| while True: | |
| entropy = os.urandom(256) | |
| private_key = hashlib.sha256(entropy).hexdigest() | |
| if int(private_key, 16) < n: | |
| break | |
| # 2. Calculate the Public key from the Private key with Elliptic Curve. | |
| public_key = elliptic.EccMultiply(generator, int(private_key, 16)) | |
| # 3. Generate a compressed and uncompressed public key | |
| uncompressed_public_key = "04" + hex(public_key[0])[2:] + hex(public_key[1])[2:] | |
| prefix_compressed_public_key = "02" if public_key[1] % 2 == 0 else "03" | |
| compressed_public_key = prefix_compressed_public_key + hex(public_key[0])[2:] | |
| print("Uncompressed Public key: ", uncompressed_public_key) | |
| print("Compressed Public key: ", compressed_public_key) | |
| # 4. Generate bitcoin addresses from uncompressed and compressed publick key | |
| print("Uncompressed Bitcoin Address: ", generate_base58_format(uncompressed_public_key, "00")) | |
| print("Compressed Bitcoin Address: ", generate_base58_format(compressed_public_key, "00")) |
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