content: #
  # Copyright 2014 Hewlett-Packard Development Company, L.P.
  #
  # SPDX-License-Identifier: Apache-2.0
  r"""
  =============================================
  B501: Test for missing certificate validation
  =============================================
  
  Encryption in general is typically critical to the security of many
  applications.  Using TLS can greatly increase security by guaranteeing the
  identity of the party you are communicating with.  This is accomplished by one
  or both parties presenting trusted certificates during the connection
  initialization phase of TLS.
  
  When HTTPS request methods are used, certificates are validated automatically
  which is the desired behavior.  If certificate validation is explicitly turned
  off Bandit will return a HIGH severity error.
  
  
  :Example:
  
  .. code-block:: none
  
      >> Issue: [request_with_no_cert_validation] Call to requests with
      verify=False disabling SSL certificate checks, security issue.
         Severity: High   Confidence: High
         CWE: CWE-295 (https://cwe.mitre.org/data/definitions/295.html)
         Location: examples/requests-ssl-verify-disabled.py:4
      3   requests.get('https://gmail.com', verify=True)
      4   requests.get('https://gmail.com', verify=False)
      5   requests.post('https://gmail.com', verify=True)
  
  .. seealso::
  
   - https://security.openstack.org/guidelines/dg_move-data-securely.html
   - https://security.openstack.org/guidelines/dg_validate-certificates.html
   - https://cwe.mitre.org/data/definitions/295.html
  
  .. versionadded:: 0.9.0
  
  .. versionchanged:: 1.7.3
      CWE information added
  
  .. versionchanged:: 1.7.5
      Added check for httpx module
  
  """
  import bandit
  from bandit.core import issue
  from bandit.core import test_properties as test
  
  
  @test.checks("Call")
  @test.test_id("B501")
  def request_with_no_cert_validation(context):
      HTTP_VERBS = {"get", "options", "head", "post", "put", "patch", "delete"}
      HTTPX_ATTRS = {"request", "stream", "Client", "AsyncClient"} | HTTP_VERBS
      qualname = context.call_function_name_qual.split(".")[0]
  
      if (
          qualname == "requests"
          and context.call_function_name in HTTP_VERBS
          or qualname == "httpx"
          and context.call_function_name in HTTPX_ATTRS
      ):
          if context.check_call_arg_value("verify", "False"):
              return bandit.Issue(
                  severity=bandit.HIGH,
                  confidence=bandit.HIGH,
                  cwe=issue.Cwe.IMPROPER_CERT_VALIDATION,
                  text=f"Call to {qualname} with verify=False disabling SSL "
                  "certificate checks, security issue.",
                  lineno=context.get_lineno_for_call_arg("verify"),
              )
  