73 lines
1.8 KiB
Python
73 lines
1.8 KiB
Python
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import multicodec
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import multiformats
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import nacl.signing
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import nacl.encoding
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from jwcrypto import jwk
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from nacl.signing import SigningKey
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from nacl.encoding import RawEncoder
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def key_to_did(public_key_bytes, type_did):
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"""did-key-format :=
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did:key:MULTIBASE(base58-btc, MULTICODEC(public-key-type, raw-public-key-bytes))"""
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mc = multicodec.add_prefix('ed25519-pub', public_key_bytes)
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# Multibase encode the hashed bytes
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did = multiformats.multibase.encode(mc, 'base58btc')
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if type_did == "web":
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return f"did:web:{did}"
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return f"did:key:{did}"
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def key_save(key):
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# Save the private JWK to a file
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private_jwk = key.export()
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with open('keypairs.jwk', 'w') as f:
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f.write(private_jwk)
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def key_read():
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# Save the private JWK to a file
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with open('keypairs.jwk', 'r') as f:
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private_jwk = f.read()
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return jwk.JWK.from_json(private_jwk)
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def get_signing_key(jwk_pr):
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private_key_material_str = jwk_pr['d']
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missing_padding = len(private_key_material_str) % 4
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if missing_padding:
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private_key_material_str += '=' * (4 - missing_padding)
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private_key_material = nacl.encoding.URLSafeBase64Encoder.decode(private_key_material_str)
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signing_key = SigningKey(private_key_material, encoder=RawEncoder)
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return signing_key
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def generate_did(jwk_pr, type_did=None):
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signing_key = get_signing_key(jwk_pr)
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verify_key = signing_key.verify_key
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public_key_bytes = verify_key.encode()
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# Generate the DID
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did = key_to_did(public_key_bytes, type_did)
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return did
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def generate_keys():
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# Generate an Ed25519 key pair
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key = jwk.JWK.generate(kty='OKP', crv='Ed25519')
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key['kid'] = 'Generated'
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jwk_pr = key.export_private(True)
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return jwk_pr
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if __name__ == "__main__":
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key = generate_keys()
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print(generate_did(key))
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