id-converter-aes-256-cbc-base64.rb

require 'openssl'
require "base64"

KEY = '1'*32
IV = '1'*16
ALG = 'aes-256-cbc'

def encrypt(plaintext)
  cipher = OpenSSL::Cipher.new(ALG)
  cipher.encrypt
  cipher.key = KEY
  cipher.iv = IV
  ciphertext = cipher.update(plaintext) + cipher.final
  Base64.encode64(ciphertext)
end

def decrypt(ciphertext)
  decipher = OpenSSL::Cipher.new(ALG)
  decipher.decrypt
  decipher.key = KEY
  decipher.iv = IV
  plaintext = decipher.update(Base64.decode64(ciphertext)) + decipher.final
end

a1 = "00000001"
a2 = "00000002"
a3 = "00000003"


puts encrypt a1          # => yKGDSvFtoy0x2k2bIpbvwA==
puts encrypt a2          # => 2obWz39l1VJr9Ck9X+LDPg==
puts encrypt a3          # => b7NnnjNKSyz8WI2HmASqhQ==
puts decrypt encrypt a1  # => 00000001
puts decrypt encrypt a2  # => 00000002
puts decrypt encrypt a3  # => 00000003

id-converter-aes-256-cbc.rb

require 'openssl'

KEY = '1'*32
IV = '1'*16
ALG = 'aes-256-cbc'

def bin2hex(s)
  s.unpack('H*').first
end

def hex2bin(s)
  s.scan(/../).map { |x| x.hex }.pack('c*')
end

def encrypt(plaintext)
  cipher = OpenSSL::Cipher.new(ALG)
  cipher.encrypt
  cipher.key = KEY
  cipher.iv = IV
  ciphertext = cipher.update(plaintext)
  ciphertext << cipher.final
  ciphertext
  # bin2hex(ciphertext)
end

def decrypt(ciphertext)
  decipher = OpenSSL::Cipher.new(ALG)
  decipher.decrypt
  decipher.key = KEY
  decipher.iv = IV
  # plaintext = decipher.update(hex2bin(ciphertext))
  plaintext = decipher.update(ciphertext)
  plaintext << decipher.final
end

a1 = "00000001"
a2 = "00000002"
a3 = "00000003"


puts encrypt a1          # => c8a1834af16da32d31da4d9b2296efc0
puts encrypt a2          # => da86d6cf7f65d5526bf4293d5fe2c33e
puts encrypt a3          # => 6fb3679e334a4b2cfc588d879804aa85
puts decrypt encrypt a1  # => 00000001
puts decrypt encrypt a2  # => 00000002
puts decrypt encrypt a3  # => 00000003

id-converter-aes-256-gcm.rb

require 'openssl'

KEY = '1'*32
IV = '1'*12
ALG = 'aes-256-gcm'

def bin2hex(s)
  s.unpack('H*').first
end

def hex2bin(s)
  s.scan(/../).map { |x| x.hex }.pack('c*')
end

def encrypt(plaintext)
  cipher = OpenSSL::Cipher.new(ALG)
  cipher.encrypt
  cipher.key = KEY
  cipher.iv = IV
  ciphertext = cipher.update(plaintext)
  bin2hex(ciphertext)
end

def decrypt(ciphertext)
  decipher = OpenSSL::Cipher.new(ALG)
  decipher.decrypt
  decipher.key = KEY
  decipher.iv = IV
  plaintext = decipher.update(hex2bin(ciphertext))
end

a1 = "00000001"
a2 = "00000002"
a3 = "00000003"


puts encrypt a1          # => c8a1834af16da32d31da4d9b2296efc0
puts encrypt a2          # => da86d6cf7f65d5526bf4293d5fe2c33e
puts encrypt a3          # => 6fb3679e334a4b2cfc588d879804aa85
puts decrypt encrypt a1  # => 00000001
puts decrypt encrypt a2  # => 00000002
puts decrypt encrypt a3  # => 00000003