DES and 3DES for ngx_lua. This implementation is influenced by lua-resty-string by agentzh. These modules bind OpenSSL libary through LuaJIT FFI. The padding is PKCS#7, and it's compatible with PKCS#5.
local des3 = require('resty.des3')
local str = require('resty.string')
local des3_cbc_with_iv = assert(des3:new('12345678abcdefgh87654321', nil,
des3.cipher('cbc'), { iv = '12345678' } ))
local crypted = des3_cbc_with_iv:encrypt("I love you. But it's a secret.")
ngx.say('DES-CBC Encryption with PKCS7 padding and iv=12345678')
ngx.say(' HEX: ' .. str.to_hex(crypted))
ngx.say(' Base64: ' .. ngx.encode_base64(crypted))
ngx.say('\nDES-CBC Decryption')
ngx.say(' ' .. des3_cbc_with_iv:decrypt(crypted))The output is
DES-CBC Encryption with PKCS7 padding and iv=12345678
HEX: 894bd277d612565661aaedb1d47ded1569bf522fb66a3d627d8432b98749bd67
Base64: iUvSd9YSVlZhqu2x1H3tFWm/Ui+2aj1ifYQyuYdJvWc=
DES-CBC Decryption
I love you. But it's a secret.
DES encryption is similar, only to note that the key length is 8 and DES is not recommended to use.
2-Clause BSD.
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