derivepassphrase.git

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# SPDX-FileCopyrightText: 2025 Marco Ricci <software@the13thletter.info>
#
# SPDX-License-Identifier: Zlib
"""A bare-bones SSH agent client supporting signing and key listing."""
from __future__ import annotations
import collections
import contextlib
import os
import socket
from typing import TYPE_CHECKING, overload
from typing_extensions import Self, assert_never
from derivepassphrase import _types
if TYPE_CHECKING:
    from collections.abc import Iterable, Iterator, Sequence
    from collections.abc import Set as AbstractSet
    from types import TracebackType
    from typing_extensions import Buffer
__all__ = ('SSHAgentClient',)
__author__ = 'Marco Ricci <software@the13thletter.info>'
# In SSH bytestrings, the "length" of the byte string is stored as
# a 4-byte/32-bit unsigned integer at the beginning.
HEAD_LEN = 4
_socket = socket
class TrailingDataError(RuntimeError):
    """The result contained trailing data."""
    def __init__(self) -> None:
        super().__init__('Overlong response from SSH agent')
class SSHAgentFailedError(RuntimeError):
    """The SSH agent failed to complete the requested operation."""
    def __str__(self) -> str:
        # Use match/case here once Python 3.9 becomes unsupported.
        if self.args == (  # pragma: no branch
            _types.SSH_AGENT.FAILURE.value,
            b'',
        ):
 
 
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