66 lines
2.3 KiB
Python
66 lines
2.3 KiB
Python
"""Onionr - Private P2P Communication.
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functions to generate ed25519 key pairs
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"""
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import nacl.signing
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import nacl.encoding
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import nacl.pwhash
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import onionrexceptions
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from onionrutils import bytesconverter
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from etc import onionrvalues
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"""
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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 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 General Public License for more details.
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You should have received a copy of the GNU 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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def generate_pub_key():
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"""Generate a Ed25519 public key pair.
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return tuple of base32encoded pubkey, privkey
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"""
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private_key = nacl.signing.SigningKey.generate()
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public_key = private_key.verify_key.encode(
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encoder=nacl.encoding.Base32Encoder())
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return (public_key.decode(), private_key.encode(
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encoder=nacl.encoding.Base32Encoder()).decode())
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def generate_deterministic(passphrase, bypassCheck=False):
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"""Generate a Ed25519 public key pair from a phase.
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not intended for human-generated key
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"""
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passStrength = onionrvalues.PASSWORD_LENGTH
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# Convert to bytes if not already
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passphrase = bytesconverter.str_to_bytes(passphrase)
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# Validate passphrase length
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if not bypassCheck:
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if len(passphrase) < passStrength:
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raise onionrexceptions.PasswordStrengthError(
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"Passphase must be at least %s characters" % (passStrength,))
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# KDF values
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kdf = nacl.pwhash.argon2id.kdf
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# Does not need to be secret, but must be 16 bytes
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salt = b"U81Q7llrQcdTP0Ux"
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ops = nacl.pwhash.argon2id.OPSLIMIT_SENSITIVE
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mem = nacl.pwhash.argon2id.MEMLIMIT_SENSITIVE
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# Generate seed for ed25519 key
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key = kdf(32, passphrase, salt, opslimit=ops, memlimit=mem)
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key = nacl.signing.SigningKey(key)
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return (
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key.verify_key.encode(nacl.encoding.Base32Encoder).decode(),
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key.encode(nacl.encoding.Base32Encoder).decode())
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