FM / paramiko

/opt/imh-python/lib/python3.9/site-packages/paramiko/

/opt/imh-python/lib/python3.9/site-packages/paramiko

Name	Size	Mode	Actions
__pycache__/	-	0755	rm
agent.py	15877	0644	edit dl rm
auth_handler.py	42964	0644	edit dl rm
auth_handler.py.orig	43006	0644	edit dl rm
auth_strategy.py	11437	0644	edit dl rm
ber.py	4369	0644	edit dl rm
buffered_pipe.py	7225	0644	edit dl rm
channel.py	49222	0644	edit dl rm
client.py	34492	0644	edit dl rm
common.py	7756	0644	edit dl rm
compress.py	1282	0644	edit dl rm
config.py	27362	0644	edit dl rm
dsskey.py	8248	0644	edit dl rm
ecdsakey.py	11653	0644	edit dl rm
ed25519key.py	7457	0644	edit dl rm
file.py	19063	0644	edit dl rm
hostkeys.py	13208	0644	edit dl rm
kex_curve25519.py	4436	0644	edit dl rm
kex_ecdh_nist.py	5012	0644	edit dl rm
kex_gex.py	10320	0644	edit dl rm
kex_group1.py	5740	0644	edit dl rm
kex_group14.py	1833	0644	edit dl rm
kex_group16.py	2288	0644	edit dl rm
kex_gss.py	24562	0644	edit dl rm
message.py	9349	0644	edit dl rm
packet.py	24314	0644	edit dl rm
pipe.py	3902	0644	edit dl rm
pkey.py	36851	0644	edit dl rm
primes.py	5107	0644	edit dl rm
proxy.py	4648	0644	edit dl rm
rsakey.py	7546	0644	edit dl rm
server.py	30457	0644	edit dl rm
sftp.py	6471	0644	edit dl rm
sftp_attr.py	8258	0644	edit dl rm
sftp_client.py	35855	0644	edit dl rm
sftp_file.py	21820	0644	edit dl rm
sftp_handle.py	7424	0644	edit dl rm
sftp_server.py	19492	0644	edit dl rm
sftp_si.py	12544	0644	edit dl rm
ssh_exception.py	7494	0644	edit dl rm
ssh_gss.py	28887	0644	edit dl rm
transport.py	135632	0644	edit dl rm
util.py	9550	0644	edit dl rm
win_openssh.py	1918	0644	edit dl rm
win_pageant.py	4177	0644	edit dl rm
_version.py	80	0644	edit dl rm
_winapi.py	11204	0644	edit dl rm
__init__.py	4446	0644	edit dl rm

Edit: /opt/imh-python/lib/python3.9/site-packages/paramiko/kex_curve25519.py (4436B)

import binascii
import hashlib

from cryptography.exceptions import UnsupportedAlgorithm
from cryptography.hazmat.primitives import constant_time, serialization
from cryptography.hazmat.primitives.asymmetric.x25519 import (
    X25519PrivateKey,
    X25519PublicKey,
)

from paramiko.message import Message
from paramiko.common import byte_chr
from paramiko.ssh_exception import SSHException

_MSG_KEXECDH_INIT, _MSG_KEXECDH_REPLY = range(30, 32)
c_MSG_KEXECDH_INIT, c_MSG_KEXECDH_REPLY = [byte_chr(c) for c in range(30, 32)]

class KexCurve25519:
    hash_algo = hashlib.sha256

def __init__(self, transport):
        self.transport = transport
        self.key = None

@classmethod
    def is_available(cls):
        try:
            X25519PrivateKey.generate()
        except UnsupportedAlgorithm:
            return False
        else:
            return True

def _perform_exchange(self, peer_key):
        secret = self.key.exchange(peer_key)
        if constant_time.bytes_eq(secret, b"\x00" * 32):
            raise SSHException(
                "peer's curve25519 public value has wrong order"
            )
        return secret

def start_kex(self):
        self.key = X25519PrivateKey.generate()
        if self.transport.server_mode:
            self.transport._expect_packet(_MSG_KEXECDH_INIT)
            return

m = Message()
        m.add_byte(c_MSG_KEXECDH_INIT)
        m.add_string(
            self.key.public_key().public_bytes(
                serialization.Encoding.Raw, serialization.PublicFormat.Raw
            )
        )
        self.transport._send_message(m)
        self.transport._expect_packet(_MSG_KEXECDH_REPLY)

def parse_next(self, ptype, m):
        if self.transport.server_mode and (ptype == _MSG_KEXECDH_INIT):
            return self._parse_kexecdh_init(m)
        elif not self.transport.server_mode and (ptype == _MSG_KEXECDH_REPLY):
            return self._parse_kexecdh_reply(m)
        raise SSHException(
            "KexCurve25519 asked to handle packet type {:d}".format(ptype)
        )

def _parse_kexecdh_init(self, m):
        peer_key_bytes = m.get_string()
        peer_key = X25519PublicKey.from_public_bytes(peer_key_bytes)
        K = self._perform_exchange(peer_key)
        K = int(binascii.hexlify(K), 16)
        # compute exchange hash
        hm = Message()
        hm.add(
            self.transport.remote_version,
            self.transport.local_version,
            self.transport.remote_kex_init,
            self.transport.local_kex_init,
        )
        server_key_bytes = self.transport.get_server_key().asbytes()
        exchange_key_bytes = self.key.public_key().public_bytes(
            serialization.Encoding.Raw, serialization.PublicFormat.Raw
        )
        hm.add_string(server_key_bytes)
        hm.add_string(peer_key_bytes)
        hm.add_string(exchange_key_bytes)
        hm.add_mpint(K)
        H = self.hash_algo(hm.asbytes()).digest()
        self.transport._set_K_H(K, H)
        sig = self.transport.get_server_key().sign_ssh_data(
            H, self.transport.host_key_type
        )
        # construct reply
        m = Message()
        m.add_byte(c_MSG_KEXECDH_REPLY)
        m.add_string(server_key_bytes)
        m.add_string(exchange_key_bytes)
        m.add_string(sig)
        self.transport._send_message(m)
        self.transport._activate_outbound()

def _parse_kexecdh_reply(self, m):
        peer_host_key_bytes = m.get_string()
        peer_key_bytes = m.get_string()
        sig = m.get_binary()

peer_key = X25519PublicKey.from_public_bytes(peer_key_bytes)

K = self._perform_exchange(peer_key)
        K = int(binascii.hexlify(K), 16)
        # compute exchange hash and verify signature
        hm = Message()
        hm.add(
            self.transport.local_version,
            self.transport.remote_version,
            self.transport.local_kex_init,
            self.transport.remote_kex_init,
        )
        hm.add_string(peer_host_key_bytes)
        hm.add_string(
            self.key.public_key().public_bytes(
                serialization.Encoding.Raw, serialization.PublicFormat.Raw
            )
        )
        hm.add_string(peer_key_bytes)
        hm.add_mpint(K)
        self.transport._set_K_H(K, self.hash_algo(hm.asbytes()).digest())
        self.transport._verify_key(peer_host_key_bytes, sig)
        self.transport._activate_outbound()

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