Sha256: ca3b9e135ac5e811dcfd45329e78f6c7a5d612ebaf40e021ab7e0c06e013a718
Contents?: true
Size: 1.51 KB
Versions: 34
Compression:
Stored size: 1.51 KB
Contents
#!/usr/bin/env ruby
# encoding: utf-8
# This file is distributed under New Relic's license terms.
# See https://github.com/newrelic/rpm/blob/master/LICENSE for complete details.
require 'digest'
path = ARGV
def usage
$stderr.puts "Usage: path_hash.rb '<app_name>;<txn_name>' ['<app_name>;<txn_name>'...]"
exit
end
usage unless path.size > 0
path_hash = 0
path.each do |hop|
app_name, transaction_name = hop.split(';')
if !app_name || !transaction_name
$stderr.puts ''
$stderr.puts "Error: Malformed transaction identifier '#{hop}'."
usage
end
identifier = "#{app_name};#{transaction_name}"
md5sum = Digest::MD5.digest(identifier)
low4_of_md5 = md5sum.unpack("@12N").first
rotated_path_hash = ((path_hash << 1) | (path_hash >> 31)) & 0xffffffff
xor_result = rotated_path_hash ^ low4_of_md5
puts '--'
puts "A: txnIdentifier: '#{identifier}'"
puts "B: MD5(A): #{Digest::MD5.hexdigest(identifier)}"
puts "C: Low 4 bytes of B: 0x#{low4_of_md5.to_s(16).rjust(8, '0')} (0b#{low4_of_md5.to_s(2).rjust(32, '0')})"
puts ''
puts "D: Input path_hash: 0x#{path_hash.to_s(16).rjust(8, '0')} (0b#{path_hash.to_s(2).rjust(32, '0')})"
puts "E: Rotated E: 0x#{rotated_path_hash.to_s(16).rjust(8, '0')} (0b#{rotated_path_hash.to_s(2).rjust(32, '0')})"
puts ""
puts "F: XOR(D, F): 0x#{xor_result.to_s(16).rjust(8, '0')} (0b#{xor_result.to_s(2).rjust(32, '0')})"
puts '--'
path_hash = xor_result
end
puts "Final result: #{path_hash.to_s(16).rjust(8, '0')}"
Version data entries
34 entries across 34 versions & 2 rubygems