o x @sRdZddlZddlZddlZddZddZddd Zd d Zd d ZddZ dS)z-Helper functions for commonly used utilities.NcCs"|d}|dkr||dSdS)azIdentify and extract PEM keys. Determines whether the given key is in the format of PEM key, and extracts the relevant part of the key if it is. Args: raw_key_input: The contents of a private key file (either PEM or PKCS12). Returns: string, The actual key if the contents are from a PEM file, or else None. s -----BEGIN N)find) raw_key_inputoffsetr>/tmp/google-cloud-sdk/lib/third_party/oauth2client/_helpers.py_parse_pem_keys  rcCstj|ddS)N),:) separators)jsondumps)datarrr _json_encode)srasciicCs8t|tjr ||n|}t|tjr|Std|)a4Converts a string value to bytes, if necessary. Unfortunately, ``six.b`` is insufficient for this task since in Python2 it does not modify ``unicode`` objects. Args: value: The string/bytes value to be converted. encoding: The encoding to use to convert unicode to bytes. Defaults to "ascii", which will not allow any characters from ordinals larger than 127. Other useful values are "latin-1", which which will only allows byte ordinals (up to 255) and "utf-8", which will encode any unicode that needs to be. Returns: The original value converted to bytes (if unicode) or as passed in if it started out as bytes. Raises: ValueError if the value could not be converted to bytes. z%{0!r} could not be converted to bytes) isinstancesix text_typeencode binary_type ValueErrorformat)valueencodingresultrrr _to_bytes-s   rcCs8t|tjr |dn|}t|tjr|Std|)aEConverts bytes to a string value, if necessary. Args: value: The string/bytes value to be converted. Returns: The original value converted to unicode (if bytes) or as passed in if it started out as unicode. Raises: ValueError if the value could not be converted to unicode. utf-8z'{0!r} could not be converted to unicode)rrrdecoderrr)rrrrr _from_bytesJs   rcCst|dd}t|dS)Nr)r=)rbase64urlsafe_b64encoderstrip) raw_bytesrrr_urlsafe_b64encode`s r$cCs*t|}|ddt|d}t|S)Nr)rlenr urlsafe_b64decode) b64stringpaddedrrr_urlsafe_b64decodees r*)r) __doc__r r rrrrrr$r*rrrrs