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# frozen_string_literal: true
require 'zlib'
# @note
# The CRC32 algorithm can easily generate collisions,
# but may be useful for generating sharding, describing
# secrets, or seeding nonce values.
#
# @summary
# Run a CRC32 calculation against a given value.
Puppet::Functions.create_function(:'stdlib::crc32') do
# @param my_data The ScalarData to evaluate
# @example Check a simple string value
# stdlib::crc32('my string') == '18fbd270'
# @example Check a Sensitive datatype
# stdlib::crc32(sensitive('my string')) == '18fbd270'
# @example Check a number
# stdlib::crc32(100.0) == 'a3fd429a'
# stdlib::crc32(100.00000) == 'a3fd429a'
# @return String
dispatch :crc32 do
param 'Variant[ScalarData, Sensitive[ScalarData], Binary, Sensitive[Binary]]', :my_data
return_type 'String'
end
def crc32(my_data)
Zlib.crc32(my_data.unwrap.to_s).to_s(16).downcase
rescue StandardError
Zlib.crc32(my_data.to_s).to_s(16).downcase
end
end
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