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# -*- coding: utf-8 -*- |
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from __future__ import absolute_import, unicode_literals |
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import base64 |
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import copy |
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import hashlib |
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import socket |
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import six |
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from cryptography.hazmat.backends import default_backend |
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from cryptography.hazmat.primitives import serialization |
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from cryptography.hazmat.primitives import hashes |
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from cryptography.hazmat.primitives.asymmetric import padding |
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from wechatpy.utils import to_binary, to_text |
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def format_url(params, api_key=None): |
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data = [to_binary('{0}={1}'.format(k, params[k])) for k in sorted(params) if params[k]] |
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if api_key: |
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data.append(to_binary('key={0}'.format(api_key))) |
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return b"&".join(data) |
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def calculate_signature(params, api_key): |
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url = format_url(params, api_key) |
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return to_text(hashlib.md5(url).hexdigest().upper()) |
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def _check_signature(params, api_key): |
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_params = copy.deepcopy(params) |
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sign = _params.pop('sign', '') |
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return sign == calculate_signature(_params, api_key) |
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def dict_to_xml(d, sign): |
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xml = ['<xml>\n'] |
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for k in sorted(d): |
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# use sorted to avoid test error on Py3k |
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v = d[k] |
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if isinstance(v, six.integer_types) or (isinstance(v, six.string_types) and v.isdigit()): |
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xml.append('<{0}>{1}</{0}>\n'.format(to_text(k), to_text(v))) |
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else: |
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xml.append( |
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'<{0}><![CDATA[{1}]]></{0}>\n'.format(to_text(k), to_text(v)) |
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) |
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xml.append('<sign><![CDATA[{0}]]></sign>\n</xml>'.format(to_text(sign))) |
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return ''.join(xml) |
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def get_external_ip(): |
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sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) |
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try: |
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wechat_ip = socket.gethostbyname('api.mch.weixin.qq.com') |
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sock.connect((wechat_ip, 80)) |
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addr, port = sock.getsockname() |
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sock.close() |
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return addr |
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except socket.error: |
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return '127.0.0.1' |
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def rsa_encrypt(data, pem, b64_encode=True): |
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""" |
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rsa 加密 |
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:param data: 待加密字符串 |
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:param pem: RSA public key 内容 |
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:param b64_encode: 是否对输出进行 base64 encode |
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:return: |
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""" |
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encoded_data = data.encode('utf-8') if not isinstance(data, bytes) else data |
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pem = pem.encode('utf-8') if not isinstance(pem, bytes) else pem |
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public_key = serialization.load_pem_public_key(pem, backend=default_backend()) |
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encrypted_data = public_key.encrypt( |
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encoded_data, |
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padding=padding.OAEP( |
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mgf=padding.MGF1(hashes.SHA1()), |
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algorithm=hashes.SHA1(), |
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label=b'', |
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) |
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) |
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if b64_encode: |
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encrypted_data = base64.b64encode(encrypted_data).decode('utf-8') |
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return encrypted_data |
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def rsa_decrypt(encrypted_data, pem, password=None): |
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""" |
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rsa 解密 |
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:param encrypted_data: 待解密 bytes |
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:param pem: RSA private key 内容 |
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:param password: RSA private key pass phrase |
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:return: |
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""" |
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pem = pem.encode('utf-8') if not isinstance(pem, bytes) else pem |
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private_key = serialization.load_pem_private_key(pem, password, backend=default_backend()) |
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data = private_key.decrypt( |
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encrypted_data, |
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padding=padding.OAEP( |
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mgf=padding.MGF1(hashes.SHA1()), |
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algorithm=hashes.SHA1(), |
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label=b'', |
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) |
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) |
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return data |
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jxtech /
wechatpy
