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Useful functions used by the rest of paramiko.
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generatorsN( t DEBUGt zero_bytet xfffffffft max_byte( t PY2t longt byte_chrt byte_ordt b( t SSHConfigc
C s t d � } d } | rJ t | � d k rJ t | d � d k rJ d } n t | � d r� t } | ro t } n | d t | � d | } n xI t d t | � d � D]/ } | d >t j d | | | d !� d } q� W| r| t d � d t | � >8} n | S( sT turns a normalized byte string into a long-int
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"t c C s� d } g } xB t | � | d k rP | j t | | | d !� � | d 7} q W| t | � k r} | j t | | � � n g | D] } | | ^ q� S( Ni i ( R t appendt format_binary_line( t datat prefixt xR t line( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyt
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� } d j g | D]- } d j t | � � t | � d d ^ q> � } d j | | � S( Nt s {:02X}R s .{:c}..i? i_ s {:50s} {}( t joint formatR ( R! t ct leftt right( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyR h s 1=c C so d } xb | D]Z } t | � } d | k o6 d k n rN | t | � 7} q
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bit_lengtht AttributeErrorR t FalseR R ( R t normt hbytet bitlen( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyR- { s
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tb_strings� s c C s� t � } t � } t | � d k r1 | d } n x� | d k r� | � } t | � d k rk | j | � n | j t | � � | j | � | j � } t | t | � � } | | | 7} | | 8} q4 W| S( s
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 salt: byte string
:param str key: human-entered password or passphrase.
:param int nbytes: number of bytes to generate.
:return: Key data `str`
i i ( R R t updateR t digestt min( t hash_algt saltt keyt nbytest keydataR: t hash_objt size( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyt generate_key_bytes� s
c C s d d l m } | | � S( s�
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
i����( t HostKeys( t paramiko.hostkeysRD ( t filenameRD ( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyt load_host_keys� s c C s t � } | j | � | S( sM
Provided only as a backward-compatible wrapper around `.SSHConfig`.
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Provided only as a backward-compatible wrapper around `.SSHConfig`.
( t lookup( t hostnameRJ ( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyt lookup_ssh_host_config� s c C s� d d | } } } d d | } } } xY | d k r� | | } | | | | } } | | | | } } | | | | } } q+ W| d k r� | | 7} n | S( Ni i ( ( R# t mt u1t u2t u3t v1t v2t v3t q( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyt mod_inverse� s
c C sk t t j � � } y t | SWnF t k
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_g_thread_idst KeyErrort _g_thread_lockt acquiret _g_thread_countert release( t tidt ret( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyt
get_thread_id� s
c C s� t j d � } t | j � d k r( d S| j | � t | d � } t j | � } d } | d 7} | j t j | d � � | j | � d S( sK send paramiko logs to a logfile,
if they're not already going somewheret paramikoi Nt as> %(levelname)-.3s [%(asctime)s.%(msecs)03d] thr=%(_threadid)-3ds %(name)s: %(message)ss %Y%m%d-%H:%M:%S(
t loggingt getLoggerR t handlerst setLevelt opent
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__module__Rz ( ( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyRu s c C s t j | � } | j t � | S( N( Rf Rg t addFiltert _pfilter( t nameRp ( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyt
get_logger s
c C sJ xC t rE y | � SWq t k
rA } | j t j k rB � qB q Xq Wd S( s6 Retries function until it doesn't raise an EINTR errorN( Rw t EnvironmentErrort errnot EINTR( t functiont e( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyt retry_on_signal s c C sw t | � t | � k r t Sd } xH t r1 t n t t | � � D]( } | t | | � t | | � AO} qA W| d k S( Ni ( R R/ R t xrangeR R ( Re R t resR ( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyt constant_time_bytes_eq s %&t ClosingContextManagerc B s e Z d � Z d � Z RS( c C s | S( N( ( Rx ( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyt __enter__) s c C s | j � d S( N( t close( Rx t typet valueR3 ( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyt __exit__, s ( R{ R| R� R� ( ( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyR� ( s c C s t | t | | � � S( N( t maxR; ( t minimumt valt maximum( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyt clamp_value0 s (4 t __doc__t
__future__R R� R5 R
R3 RY Rf t paramiko.commonR R R R t paramiko.py3compatR R R R R t paramiko.configR
R/ R R R Rw R R% R R, R- R8 RC RG RK RN RW R[ R_ t LockR] Rc Rt t objectRu R~ R� R� R� R� R� ( ( ( s1 /tmp/pip-install-A1qMVe/paramiko/paramiko/util.pyt <module> sH "(