mirror of
https://github.com/SickGear/SickGear.git
synced 2024-11-15 17:35:04 +00:00
329 lines
12 KiB
Python
329 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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from __future__ import absolute_import, unicode_literals
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try:
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# noinspection PyProtectedMember
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from base64 import encodebytes
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except ImportError:
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from base64 import encodestring as encodebytes
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from datetime import datetime
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from hashlib import sha256 as sha256
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from hashlib import sha1 as sha
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import hmac
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import json
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import requests
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import tempfile
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import time
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import diskcache
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from dateutil.parser import parse
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from dateutil.tz import tzutc
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from six.moves.urllib.parse import urlparse, parse_qs, quote
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from six import string_types, text_type
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from .constants import APP_KEY, HOST, USER_AGENT, BASE_URI
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class ZuluHmacAuthV3HTTPHandler(object):
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def __init__(self, host, secret_key, security_token, access_key):
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self.secret_key = secret_key
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self.host = host
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self.security_token = security_token
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self.access_key = access_key
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self._hmac_256 = self._get_hmac(ignore=True)
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def _get_hmac(self, ignore=False):
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if ignore or self._hmac_256:
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digestmod = sha256
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else:
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digestmod = sha
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return hmac.new(self.secret_key.encode('utf-8'), digestmod=digestmod)
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@staticmethod
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def canonical_headers(headers_to_sign):
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"""
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Return the headers that need to be included in the StringToSign
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in their canonical form by converting all header keys to lower
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case, sorting them in alphabetical order and then joining
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them into a string, separated by newlines.
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"""
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vals = sorted(['%s:%s' % (n.lower().strip(),
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headers_to_sign[n].strip()) for n in headers_to_sign])
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return '\n'.join(vals)
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def headers_to_sign(self, http_request):
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headers_to_sign = {'Host': self.host}
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for name, value in http_request.headers.items():
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lname = name.lower()
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if lname.startswith('x-amz'):
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headers_to_sign[name] = value
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return headers_to_sign
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def canonical_query_string(self, http_request):
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if http_request.method == 'POST':
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return ''
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qs_parts = []
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for param in sorted(http_request.params):
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value = self.get_utf8_value(http_request.params[param])
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param_ = quote(param, safe='-_.~')
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value_ = quote(value, safe='-_.~')
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qs_parts.append('{0}={1}'.format(param_, value_))
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return '&'.join(qs_parts)
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@staticmethod
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def get_utf8_value(value):
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if isinstance(value, bytes):
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value.decode('utf-8')
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return value
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if not isinstance(value, string_types):
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value = text_type(value)
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if isinstance(value, text_type):
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value = value.encode('utf-8')
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return value
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def string_to_sign(self, http_request):
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headers_to_sign = self.headers_to_sign(http_request)
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canonical_qs = self.canonical_query_string(http_request)
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canonical_headers = self.canonical_headers(headers_to_sign)
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string_to_sign = '\n'.join((
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http_request.method,
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http_request.path,
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canonical_qs,
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canonical_headers,
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'',
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http_request.body
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))
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return string_to_sign, headers_to_sign
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def add_auth(self, req):
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"""
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Add AWS3 authentication to a request.
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:type req: :class`boto.connection.HTTPRequest`
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:param req: The HTTPRequest object.
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"""
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# This could be a retry. Make sure the previous
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# authorization header is removed first.
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if 'X-Amzn-Authorization' in req.headers:
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del req.headers['X-Amzn-Authorization']
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req.headers['X-Amz-Date'] = self.formatdate(usegmt=True)
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if self.security_token:
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req.headers['X-Amz-Security-Token'] = self.security_token
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string_to_sign, headers_to_sign = self.string_to_sign(req)
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# print('StringToSign:\n%s' % string_to_sign)
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hash_value = sha256(string_to_sign.encode('utf-8')).digest()
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b64_hmac = self.sign_string(hash_value)
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s = "AWS3 AWSAccessKeyId=%s," % self.access_key
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s += "Algorithm=%s," % self.algorithm()
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s += "SignedHeaders=%s," % ';'.join(headers_to_sign)
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s += "Signature=%s" % b64_hmac
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req.headers['X-Amzn-Authorization'] = s
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def sign_string(self, string_to_sign):
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new_hmac = self._get_hmac()
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new_hmac.update(string_to_sign)
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return encodebytes(new_hmac.digest()).decode('utf-8').strip()
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def algorithm(self):
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if self._hmac_256:
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return 'HmacSHA256'
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return 'HmacSHA1'
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@staticmethod
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def formatdate(timeval=None, localtime=False, usegmt=False):
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"""Returns a date string as specified by RFC 2822, e.g.:
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Fri, 09 Nov 2001 01:08:47 -0000
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Optional timeval if given is a floating point time value as accepted by
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gmtime() and localtime(), otherwise the current time is used.
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Optional localtime is a flag that when True, interprets timeval, and
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returns a date relative to the local timezone instead of UTC, properly
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taking daylight savings time into account.
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Optional argument usegmt means that the timezone is written out as
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an ascii string, not numeric one (so "GMT" instead of "+0000"). This
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is needed for HTTP, and is only used when localtime==False.
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"""
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# Note: we cannot use strftime() because that honors the locale and RFC
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# 2822 requires that day and month names be the English abbreviations.
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if timeval is None:
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timeval = time.time()
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if localtime:
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now = time.localtime(timeval)
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# Calculate timezone offset, based on whether the local zone has
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# daylight savings time, and whether DST is in effect.
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if time.daylight and now[-1]:
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offset = time.altzone
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else:
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offset = time.timezone
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hours, minutes = divmod(abs(offset), 3600)
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# Remember offset is in seconds west of UTC, but the timezone is in
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# minutes east of UTC, so the signs differ.
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if offset > 0:
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sign = '-'
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else:
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sign = '+'
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zone = '%s%02d%02d' % (sign, hours, minutes // 60)
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else:
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now = time.gmtime(timeval)
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# Timezone offset is always -0000
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if usegmt:
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zone = 'GMT'
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else:
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zone = '-0000'
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return '%s, %02d %s %04d %02d:%02d:%02d %s' % (
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['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'][now[6]],
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now[2],
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['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
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'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'][now[1] - 1],
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now[0], now[3], now[4], now[5],
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zone)
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class HTTPRequest(object):
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def __init__(self, method, protocol, host, port, path, auth_path, params, headers, body):
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"""Represents an HTTP request.
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:type method: string
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:param method: The HTTP method name, 'GET', 'POST', 'PUT' etc.
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:type protocol: string
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:param protocol: The http protocol used, 'http' or 'https'.
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:type host: string
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:param host: Host to which the request is addressed. eg. abc.com
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:type port: int
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:param port: port on which the request is being sent. Zero means unset,
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in which case default port will be chosen.
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:type path: string
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:param path: URL path that is being accessed.
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:type auth_path: string or None
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:param path: The part of the URL path used when creating the
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authentication string.
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:type params: dict
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:param params: HTTP url query parameters, with key as name of
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the param, and value as value of param.
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:type headers: dict
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:param headers: HTTP headers, with key as name of the header and value
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as value of header.
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:type body: string
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:param body: Body of the HTTP request. If not present, will be None or
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empty string ('').
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"""
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self.method = method
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self.protocol = protocol
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self.host = host
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self.port = port
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self.path = path
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if auth_path is None:
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auth_path = path
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self.auth_path = auth_path
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self.params = params
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# chunked Transfer-Encoding should act only on PUT request.
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if headers and 'Transfer-Encoding' in headers and \
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headers['Transfer-Encoding'] == 'chunked' and \
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self.method != 'PUT':
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self.headers = headers.copy()
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del self.headers['Transfer-Encoding']
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else:
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self.headers = headers
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self.body = body
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def __str__(self):
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return (('method:(%s) protocol:(%s) host(%s) port(%s) path(%s) '
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'params(%s) headers(%s) body(%s)')
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% (self.method, self.protocol, self.host, self.port, self.path,
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self.params, self.headers, self.body))
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class Auth(object):
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SOON_EXPIRES_SECONDS = 60
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_CREDS_STORAGE_KEY = 'imdbpie-credentials'
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def __init__(self):
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self._cachedir = tempfile.gettempdir()
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def _get_creds(self, retry=False):
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with diskcache.Cache(directory=self._cachedir) as cache:
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try:
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return cache.get(self._CREDS_STORAGE_KEY)
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except ValueError as e:
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if not retry:
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cache.close()
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import os
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os.remove(os.path.join(self._cachedir, diskcache.core.DBNAME))
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return self._get_creds(retry=True)
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else:
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raise e
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def _set_creds(self, creds):
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with diskcache.Cache(directory=self._cachedir) as cache:
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cache[self._CREDS_STORAGE_KEY] = creds
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return creds
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def clear_cached_credentials(self):
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with diskcache.Cache(directory=self._cachedir) as cache:
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cache.delete(self._CREDS_STORAGE_KEY)
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def _creds_soon_expiring(self):
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creds = self._get_creds()
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if not creds:
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return creds, True
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expires_at = parse(creds['expirationTimeStamp'])
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now = datetime.now(tzutc())
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if now < expires_at:
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time_diff = expires_at - now
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if time_diff.total_seconds() < self.SOON_EXPIRES_SECONDS:
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# creds will soon expire, so renew them
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return creds, True
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return creds, False
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else:
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return creds, True
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@staticmethod
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def _get_credentials():
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url = '{0}/authentication/credentials/temporary/ios82'.format(BASE_URI)
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response = requests.post(
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url, json={'appKey': APP_KEY}, headers={'User-Agent': USER_AGENT}
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)
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response.raise_for_status()
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return json.loads(response.content.decode('utf8'))['resource']
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def get_auth_headers(self, url_path):
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creds, soon_expires = self._creds_soon_expiring()
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if soon_expires:
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creds = self._set_creds(creds=self._get_credentials())
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handler = ZuluHmacAuthV3HTTPHandler(
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host=HOST,
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secret_key=creds['secretAccessKey'],
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security_token=creds['sessionToken'], access_key=creds['accessKeyId']
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)
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parsed_url = urlparse(url_path)
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params = {
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key: val[0] for key, val in parse_qs(parsed_url.query).items()
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}
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request = HTTPRequest(
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method='GET', protocol='https', host=HOST,
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port=443, path=parsed_url.path, auth_path=None, params=params,
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headers={'User-Agent': USER_AGENT}, body=''
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)
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handler.add_auth(req=request)
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headers = request.headers
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return headers
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