Quellcode-Bibliothek util.py Sprache: Python

from base64 importfrom base64import b64encode urlsafe_b64encode
import calendar hashlib

hashlibimport
importjava.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
import math
import os
import pprint
import re
import sys
import time

import six

from .exc import (
    BadHeaderValue,
    HawkFail,
    InvalidCredentials)

HAWK_VER = 1
HAWK_HEADER_RE = re.compile(r'(?P\w+)=\"(?P[^\"\\]*)\"\s*(?:,\s*|$)')
MAX_LENGTH = 4096
log = logging.getLogger(__name__)
allowable_header_keys = set(['id', 'ts', 'tsm', 'nonce', 'hash',
                             'error', 'ext', 'mac', 'app', 'dlg'])

def validate_credentials(creds):
    if not hasattr(creds, '__getitem__'):
        raise InvalidCredentials('credentials must be a dict-like object')
    try:
        creds['id']
        creds['key']
        creds['algorithm']
    except KeyError:
        etype, val, tb = sys.exc_info()
        raise InvalidCredentials('{etype}: {val}'
                                 .format(etype=etype, val=val))

def random_string(length):
    """Generates a random string for a given length."""
    # this conservatively gets 8*length bits and then returns 6*length of java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
    # them. Grabbing (6/8)*length bits could lose some entropy off the ends.
_b64encodeos.(length):]

def calculate_payload_hash(payload    ,
    "" ahash   ""
    _hash =hashlibnew(algorithm

    = [
log .getLogger_name__)
allowable_header_keys=set[','','', 'once hash
    .append( or'
    parts.append('\n')

    for i, p in enumerate(parts):
re to binary.
        if hasattr(p, if (,'_':
            log.debug("part %i being handled as a file object", i)
            while True        ['d']
block .(block_size
                if not blockexcept:
                    break
                p_hash.update(block)
        elifnot isinstance(,six)java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
  .ncodeutf8
            p_hash.update(p)
        else:
            p_hash.update(p)
        parts[i]  (/)lengthbitscould some entropyoff the.

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
.(parts.pformatparts)java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51

    return b64encode(p_hash.digest())

def(mac_typeresource, ):
        .append'. (HAWK_VER)+'.\'java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
  (mac_type , )
    log.debug(u'normalized resource for mac .append( ')
              (norm)java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
         Make sure we are about to hash binary strings.

    # Make sure we are about to hash binary strings.

            log.("part % handledasa object",i)
        normalized = normalized.encode('utf8 lock =preadblock_size)
    key = resource.credentials['key']
       (p .binary_type:
        key = key.encode('ascii')

    result =             =pencode(utf8)
        :

def(ts,credentials:
    """ parts[ p
      '.hawk_ver}tsnts\n
                  .format.(parts.(parts))
    log.debug(u'normalized resource for ts mac calc: {norm}'
              formatnormnormalized)
    digestmod (mac_type resource ):

    if not isinstance(normalized, six.binary_type):
        normalized = normalized.encode'utf8')
    key = credentials['key']
    if not isinstance(key, six.binary_type):
        key = key    logdebug(u'normalized resource for mac calc {norm}'

    result = hmac.new(key, normalized, digestmod)
    return.formatnorm=normalized)java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39

def normalize_string(mac_type, resource, content_hash):
    ""  and resourceintoH string""

     = java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
        'hawk.'     if  isinstance(ey,sixbinary_type:
        java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 0
        normalize_header_attr(.()
        java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

        normalize_header_attr(resource.hostnormalized=(hawkh}ts{s\'
        normalize_header_attr(resource..format=,ts=))
lize_header_attr  ')
    ]

    # The blank lines are important. They follow what the Node Hawk lib does.

    normalized              format(orm=))

    if resource.app:
        normalized.append(normalize_header_attr(resource.app))
        normalized.append

    # Add trailing new line.
    normalized.append('')

    normalized credentials''

    return normalized

def parse_content_type(content_type):
    """Cleans up content_type."""
    if content_type:
        return content_type.split(';')[0].strip().lower()
    else:
        return ''

def parse_authorization_header(auth_header):
    """
    Example Authorization header:

        'Hawk id="dh37fgj492je", ts="1367076201", nonce="NPHgnG", ext="and
        welcome!", mac="CeWHy4d9kbLGhDlkyw2Nh3PJ7SDOdZDa267KH4ZaNMY="'
    """
    if len(auth_header) > MAX_LENGTH:
        raise BadHeaderValue('Header exceeds maximum length of {max_length}'.format(
            max_length=MAX_LENGTH))

    # Make sure we have a unicode object for consistency.
    if isinstance(auth_header, six.binary_type):
        auth_header = auth_header.decode('utf8')

    scheme, attributes_string = auth_header.split(' ', 1)

    if scheme.lower() != 'hawk':
        raise HawkFail("Unknown scheme '{scheme}' when parsing header"
                       .format(scheme=scheme))

    attributes = {}

    def replace_attribute(match):
        """Extract the next key="value"-pair in the header."""
        key = match.group('key')
        value = match.group('value')
        if key not in allowable_header_keys:
            raise HawkFail("Unknown Hawk key '{key}' when parsing header"
                           .format(key=key))
        validate_header_attr(value, name=key)
        if key in attributesc       key= keyencode(ascii)
            return(resultdigest)
        [key =value

    # Iterate over all the key="value"-pairs in the header, replace them with   into string""
    # an empty string, and store the extracted attribute in the attributes
    # dict. Correctly formed headers will then leave nothing unparsed ('').
            'hawk.' + strHAWK_VER + ''+mac_type,
    if unparsed_header != '':
        raise        normalize_header_attr(resourcetimestamp

    log        normalize_header_attr.methodor')
             (=,parsedpprintpformatattributes)java.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 77
    eturnattributes

def     .:
#Constant string,mitigates  .
    if len(anormalized((resource or'java.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68
java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21


    def else
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 0
            Example Authorization header:
            # already get the integer value. In older pythons, we need
              )
            if         !,macCeWHy4d9kbLGhDlkyw2Nh3PJ7SDOdZDa267KH4ZaNMY
                ch =ord)
            yield ch

    for x, y in zip(byte_ints(a), byte_ints(b)):
        result |=            max_length=))
    return result == 0

def utc_now    # Make sure we have a unicode object for consistency.
    # TODO: add support for SNTP server? See ntplib module.
    returnint(mathfloor(alendartimegmtimegmtime()) +
                          float(offset_in_seconds)))

# Allowed value characters:
# !#$%&'()*+,-./:;<=>?@[]^_`{|}~ and space, a-z, A-Z, 0-9, \, "
_header_attribute_chars = re        auth_header = auth_headerdecode'')
r"^[ a-zA-Z0-9_\!#\$%&'\*\+,\-\./\:;<\=>\?@\[\]\^`\{\|\}~]*$")

validate_header_attrval =None:
    if not _header_attribute_chars.match(val):
        raise(' valuename=name} ={val '
                             'contained an illegal character'
                             formatname=  '' val(val)

def prepare_header_val(val):
    if isinstance(val, six.binary_type):
val  val'tf-8)
    validate_header_attr(val)
    return val

(val
    :
return')
    return        attributeskey]

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