aws_waf_size_constraint

Use the aws_waf_size_constraint_set Chef InSpec audit resource to test the properties of a single AWS Web Application Firewall (WAF) size constraint set.

For additional information, including details on parameters and properties, see the AWS documentation on AWS::WAF::SizeConstraintSet resource type.

Installation

This resource is available in the Chef InSpec AWS resource pack.

See the Chef InSpec documentation on cloud platforms for information on configuring your AWS environment for InSpec and creating an InSpec profile that uses the InSpec AWS resource pack.

Syntax

Ensure that a size constraint set exists.

describe aws_waf_size_constraint_set(size_constraint_set_id: 'SIZE_CONSTRAINT_SET_ID') do
  it { should exist }
end

Parameters

size_constraint_set_id (required): A unique identifier for a size constrain set.

Properties

size_constraint_set_id: A unique identifier for a size constrain set.
name: The name of the size constrain set.
size_constraints: Specifies the parts of web requests that you want to inspect for cross-site scripting attacks.
size_constraints_field_to_match_types: The part of the web request that you want AWS WAF to search for a specified string.
size_constraints_field_to_match_data: When the value of Type is HEADER, enter the name of the header that you want AWS WAF to search, for example, User-Agent or Referer.
size_constraints_text_transformations: Text transformations eliminate some of the unusual formatting that attackers use in web requests in an effort to bypass AWS WAF.
size_constraints_comparison_operators: The type of comparison you want AWS WAF to perform. AWS WAF uses this in combination with the provided Size and FieldToMatch to build an expression in the form of “Size ComparisonOperator size in bytes of FieldToMatch”.
size_constraints_sizes: The size in bytes that you want AWS WAF to compare against the size of the specified FieldToMatch.

Examples

Ensure a size constraint set is available.

describe aws_waf_size_constraint_set(size_constraint_set_id: 'SIZE_CONSTRAINT_SET_ID') do
  its('size_constraint_set_id') { should eq 'SIZE_CONSTRAINT_SET_ID' }
end

Ensure a size constraint set name is available.

describe aws_waf_size_constraint_set(size_constraint_set_id: 'SIZE_CONSTRAINT_SET_ID') do
    its('name') { should eq 'SIZE_CONSTRAINT_SET_NAME' }
end

Ensure an a size constraint set type is HEADER.

describe aws_waf_size_constraint_set(size_constraint_set_id: 'SIZE_CONSTRAINT_SET_ID') do
    its('size_constraints_field_to_match_types') { should include 'HEADER' }
end

Verify the size of the constraint set.

describe aws_waf_size_constraint_set(size_constraint_set_id: 'SIZE_CONSTRAINT_SET_ID') do
    its('size_constraints_sizes') { should include '5' }
end

Matchers

This Chef InSpec audit resource has the following special matchers. For a full list of available matchers, please visit our Universal Matchers page.

The controls will pass if the get method returns at least one result.

exist

Use should to test that the entity exists.

describe aws_waf_size_constraint_set(size_constraint_set_id: 'SIZE_CONSTRAINT_SET_ID') do
  it { should exist }
end

Use should_not to test the entity does not exist.

describe aws_waf_size_constraint_set(size_constraint_set_id: 'SIZE_CONSTRAINT_SET_ID') do
  it { should_not exist }
end

be_available

Use should to check if the entity is available.

describe aws_waf_size_constraint_set(size_constraint_set_id: 'SIZE_CONSTRAINT_SET_ID') do
  it { should be_available }
end

AWS Permissions

Your Principal will need the WAF:Client:GetSizeConstraintSetResponse action with Effect set to Allow.

aws_waf_size_constraint_set resource