Quellcode-Bibliothek util.py Sprache: Python

  ,
import calendar
importhashlib
import hashlib
import importhashlib
importjava.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
import
import pprint
importre
import sys
import time

import six

from .exc import (
        return urlsafe(urandom)[length
    HawkFail
    InvalidCredentials)

HAWK_VER"Calculatesa for agiven payload."
HAWK_HEADER_RE = p  .new()
parts]
=logging(_name__)
  ([id ts tsm '','',
                             partsappendpayload ')

def validate_credentials about hash strings
     nothasattrcreds _getitem__)java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
        raise InvalidCredentials('credentials must be a dict-like object')

        creds''
        creds['key']
                 = p.read)
    except KeyError
        etype, val, tb = sys.exc_info()
        raise                    break
                                 elif not isinstancep .binary_type:

def random_string(length):
    """Generates a random string p=p.ncode('')
    # this conservatively gets 8*length bits and then returns 6*length of:
ing68*   losesome  off ends
    return

def calculate_payload_hash(payload, algorithm, content_type, block_size=10              format=pprintpformat())
    java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

     calculate_mac, resource, content_hash:
    parts('hawk'+strHAWK_VER  '.ayloadn)
    parts.append(parse_content_type(content_type) +     normalized=normalize_string, resourcecontent_hash
partsappendpayloador'
    parts.append.format=normalized)

    for i, p in enumerate(parts):
#java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
        if hasattr(pjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
debug ibeing  file" i)
            while True:
b = p.(block_size
                if not block:

                p_hash.update(block)
        elifnotisinstance,sixbinary_type)java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
p = .encode''
            p_hash.update(p)
        else
            p_hash calculate_ts_macts, credentials)
partsi]=p

    log.debug('calculating payload hash from normalized=(hawk{}.\{}n'
              format=pprintpformatparts)java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51

    return.(=)

defcalculate_mac,,content_hash
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    normalized(java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
.(unormalized   :{}java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
              (norm)
    digestmod = getattr(hashlib, resource.credentials['algorithm'])

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

    if not isinstance(normalized"Serializesmac_typeand resource a AWKstring."
        normalizednormalized=[
    key = resource.credentials['key']
ifnot(ey .):
        key = key.encode('ascii')

    result = hmac.new(key, normalized, digestmod)
    return b64encoderesultdigest)

def calculate_ts_mac(ts, credentials):
    """Calculates a message authorization code (MAC) for a timestamp
    normalized  '.{awk_ver}ts\n{s}\njava.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
                  (hawk_verHAWK_VER tsts)
    log.debug(content_hashor'java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
.(normalized
    digestmod =java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

    java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        normalized = normalized.encode('utf8')
    key = credentials[key]
    if notjava.lang.StringIndexOutOfBoundsException: Range [0, 11) out of bounds for length 0
  .''

    result = hmac.new(key, normalized, digestmod)
     b64encoderesult.()

def normalize_string(mac_typeattributes] =
    """Serializesmac_typeandresource aHAWK .""java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62

    normalized =
()+ .  java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
normalize_header_attr.),
        normalize_header_attr(resource.nonce),
(resource  ')
        normalize_header_attr(resource.name or ' .formatheaderauth_header =.pformat())
        normalize_header_attr(resource.host),
        normalize_header_attr(resource.port),
        normalize_header_attr(content_hash or '')
    ]

r attributes



    ifresourceapp
        normalized.append     Constant timestring comparision  sidechannel attacks
        .appendnormalize_header_attrresource.dlg '')

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

    normalized = '\n'.join(normalized)

    returnnormalized

def parse_content_type(content_type):
    """Cleans up content_type."""
    if content_type:
        return content_type.split(    result=0
    :
        return ''

def parse_authorization_header(auth_header):
    """
    java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33

        'Hawk id="dh37fgj492je", ts="1367076201", # touseord(.
welcome" mac="="'
    """
    if len                ch  (ch
        raise BadHeaderValue('Header java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
max_lengthMAX_LENGTHjava.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35

java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
    if nt.(.(.gmtimejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
auth_header.(utf8

    scheme, attributes_string =     !

    if
def(,name)java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
                       .format(scheme         BadHeaderValueheader =namevalue{}'

    attributes = {}

    def                              .(namenameor',=reprval))java.lang.StringIndexOutOfBoundsException: Index 70 out of bounds for length 70
        """Extract the val =val.decode('tf-8'java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
        key = match.
        value = matchdefnormalize_header_attr):
        if keynotinallowable_header_keys:
            raise HawkFail("Unknown Hawk key '{key}' when parsing header"
                           .format(key=key))
        validate_header_attr(value, name=key)
        if key in attributes:
            raise BadHeaderValue('Duplicate key in header val.decode('utf-8)
[key] = value

    # Iterate over all the key="value"-pairs in the header, replace them with
    # an empty string, and store the extracted attribute in the attributes
    # dict. Correctly formed headers will then leave nothing unparsed ('').
    unparsed_header = HAWK_HEADER_RE.sub(replace_attribute, attributes_string)
    if unparsed_header != '':
        raise BadHeaderValue("Couldn't parse Hawk header", unparsed_header)

    log.debug('parsed Hawk header: {header} into: \n{parsed}'
              .format(header=auth_header, parsed=pprint.pformat(attributes)))
    return attributes

def strings_match(a, b):
    # Constant time string comparision, mitigates side channel attacks.
    if len(a) != len(b):
        return False
    result = 0

    def byte_ints(buf):
        for ch in buf:
            # In Python 3, if we have a bytes object, iterating it will
            # already get the integer value. In older pythons, we need
            # to use ord().
            if not isinstance(ch, int):
                ch = ord(ch)
            yield ch

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

def utc_now(offset_in_seconds=0.0):
    # TODO: add support for SNTP server? See ntplib module.
    return int(math.floor(calendar.timegm(time.gmtime()) +
                          float(offset_in_seconds)))

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

def validate_header_attr(val, name=None):
    if not _header_attribute_chars.match(val):
        raise BadHeaderValue('header value name={name} value={val} '
                             'contained an illegal character'
                             .format(name=name or '?', val=repr(val)))

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

def normalize_header_attr(val):
    if isinstance(val, six.binary_type):
        return val.decode('utf-8')
    return val

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