31 lines
782 B
Python
31 lines
782 B
Python
"""Utility functions"""
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from base64 import b64decode, b64encode
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import os
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from nacl.signing import SigningKey
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import yaml
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class ConfigException(Exception):
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"""Exception to raise if there is a problem with the configuration data"""
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def tag(key):
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"""Create tag from public key."""
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return b"@" + b64encode(bytes(key)) + b".ed25519"
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def load_ssb_secret():
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"""Load SSB keys from ~/.ssb"""
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with open(os.path.expanduser("~/.ssb/secret"), encoding="utf-8") as f:
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config = yaml.load(f, Loader=yaml.SafeLoader)
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if config["curve"] != "ed25519":
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raise ConfigException("Algorithm not known: " + config["curve"])
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server_prv_key = b64decode(config["private"][:-8])
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return {"keypair": SigningKey(server_prv_key[:32]), "id": config["id"]}
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