147 lines
4.0 KiB
Python
Executable File
147 lines
4.0 KiB
Python
Executable File
#!/usr/bin/env python3
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"""
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CopyLeft 2020 Pascal Engélibert <tuxmain@zettascript.org>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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"""
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__version__ = "1.0"
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import os, sys, duniterpy.key, libnacl.sign, base58, base64
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def getargv(arg:str, default:str="", n:int=1, args:list=sys.argv) -> str:
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if arg in args and len(args) > args.index(arg)+n:
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return args[args.index(arg)+n]
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else:
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return default
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def read_data(data_path, b=True):
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if data_path == "-":
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if b:
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return sys.stdin.read().encode()
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else:
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return sys.stdin.read()
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else:
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return open(os.path.expanduser(data_path), "rb" if b else "r").read()
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def write_data(data, result_path):
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if result_path == "-":
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os.fdopen(sys.stdout.fileno(), 'wb').write(data)
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else:
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open(os.path.expanduser(result_path), "wb").write(data)
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def encrypt(data, pubkey):
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return duniterpy.key.PublicKey(pubkey).encrypt_seal(data)
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def decrypt(data, privkey):
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return privkey.decrypt_seal(data)
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def sign(data, privkey):
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return privkey.sign(data)
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def verify(data, pubkey):
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try:
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sys.stderr.write("Signature OK!\n")
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return libnacl.sign.Verifier(duniterpy.key.PublicKey(pubkey).hex_pk()).verify(data)
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except ValueError:
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sys.stderr.write("Bad signature!\n")
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exit(1)
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def get_privkey(privkey_path, pubsec):
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if pubsec:
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return duniterpy.key.SigningKey.from_pubsec_file(privkey_path)
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else:
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return duniterpy.key.SigningKey.from_seedhex(read_data(privkey_path, False))
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fmt = {
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"raw": lambda data: data,
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"16": lambda data: data.hex().encode(),
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"32": lambda data: base64.b32encode(data),
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"58": lambda data: base58.b58encode(data),
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"64": lambda data: base64.b64encode(data),
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"64u": lambda data: base64.urlsafe_b64encode(data),
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"85": lambda data: base64.b85encode(data),
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}
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def show_help():
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print("""Usage:
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python3 natools.py <command> [options]
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Commands:
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encrypt Encrypt data
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decrypt Decrypt data
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sign Sign data
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verify Verify data
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Options:
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-i <path> Input file path (default: -)
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-k <path> Privkey file path (default: authfile.key)
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--pubsec Use pub/sec format for -p
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-p <str> Pubkey (base58)
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-o <path> Output file path (default: -)
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--noinc Do not include msg after signature
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-O <fmt> Output format: raw 16 32 58 64 64u 85 (default: raw)
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--help Show help
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--version Show version
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Note: "-" means stdin or stdout.
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""")
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if __name__ == "__main__":
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if "--help" in sys.argv:
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show_help()
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exit()
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if "--version" in sys.argv:
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print(__version__)
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exit()
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data_path = getargv("-i", "-")
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privkey_path = getargv("-k", "authfile.key")
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pubsec = "--pubsec" in sys.argv
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pubkey = getargv("-p")
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result_path = getargv("-o", "-")
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output_format = getargv("-O", "raw")
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try:
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if sys.argv[1] == "encrypt":
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write_data(fmt[output_format](encrypt(read_data(data_path), pubkey)), result_path)
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elif sys.argv[1] == "decrypt":
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write_data(fmt[output_format](decrypt(read_data(data_path), get_privkey(privkey_path, pubsec))), result_path)
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elif sys.argv[1] == "sign":
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data = read_data(data_path)
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signed = sign(data, get_privkey(privkey_path, pubsec))
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if "--noinc" in sys.argv:
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signed = signed[:len(signed)-len(data)]
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write_data(fmt[output_format](signed), result_path)
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elif sys.argv[1] == "verify":
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write_data(fmt[output_format](verify(read_data(data_path), pubkey)), result_path)
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else:
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show_help()
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except Exception as e:
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sys.stderr.write("Error: {}\n".format(e))
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show_help()
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exit(1)
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