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Useful functions used by the rest of paramiko.
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Given a password, passphrase, or other human-source key, scramble it
through a secure hash into some keyworthy bytes. This specific algorithm
is used for encrypting/decrypting private key files.
:param function hash_alg: A function which creates a new hash object, such
as ``hashlib.sha256``.
:param salt: data to salt the hash with.
:type bytes salt: Hash salt bytes.
:param str key: human-entered password or passphrase.
:param int nbytes: number of bytes to generate.
:return: Key data, as `bytes`.
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Read a file of known SSH host keys, in the format used by openssh, and
return a compound dict of ``hostname -> keytype ->`` `PKey
<paramiko.pkey.PKey>`. The hostname may be an IP address or DNS name. The
keytype will be either ``"ssh-rsa"`` or ``"ssh-dss"``.
This type of file unfortunately doesn't exist on Windows, but on posix,
it will usually be stored in ``os.path.expanduser("~/.ssh/known_hosts")``.
Since 1.5.3, this is just a wrapper around `.HostKeys`.
:param str filename: name of the file to read host keys from
:return:
nested dict of `.PKey` objects, indexed by hostname and then keytype
r )�HostKeys)Zparamiko.hostkeysrM )�filenamerM r r r �load_host_keys� s rO c C s t � }|�| � |S )z�
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r: c C s8 t | t�r| �|�S t | t�r"| S tdt| �� ���dS )z cast bytes or unicode to unicoder� N)r� r �decoder� r� r� r� r r r �uJ s
r� )F)T)r" )r� )r� )+�__doc__rA r r? � threadingrb Zparamiko.commonr r r r r r Zparamiko.configr r r! r- r* r; r< rD rL rO rR rU r[ �localr\ r_ �Lockr^ r` ro rp ry r{ r} r~ r� r� r: r� r r r r �<module> sB