OpenSSL [des-ede3-cbc] Decryption php

问题

i had to receive some data encrypted with 3DES with shared keys. I'm using php7 and openssl_decrypt function, but I'm not able to recreate the result of the example of the documentation sent to me.

The OpenSSL command that create the data sent to me is the following:

openssl enc -des-ede3-cbc -base64 -K 17839778773fadde0066e4578710928988398877bb123789 -iv 00000000 -in D:/in.txt

Example:
string_encoded: 123456
data_to_decrypt: Ja79hWTRfBE=

I tried to decode "Ja79hWTRfBE=" with an online tool and I successfully obtain "123456". (I used this tool: http://tripledes.online-domain-tools.com/ with input text (hex) "25aefd8564d17c11", function: 3DES, mode: CBC, key (hex) 17839778773fadde0066e4578710928988398877bb123789, iv: 00000000 )

Below my php code:

$key = "17839778773fadde0066e4578710928988398877bb123789";
$decData = openssl_decrypt(base64_decode('Ja79hWTRfBE='), 'DES-EDE3-CBC', $key, 0, "00000000");
var_dump($decData);

var_dump return me bool(false).

What am i doing wrong?

回答1:

i can reproduce your goal with the following code:

<?php

$data = "123456";
$method = "DES-EDE3";
$key = "17839778773fadde0066e4578710928988398877bb123789";
$options = 0;

// transform the key from hex to string
$key = pack("H*", $key);

// encrypt
$enc = openssl_encrypt($data, $method, $key, $options);
// decrypt
$dec = openssl_decrypt($enc, $method, $key, $options);

echo "plain: ".$data." encrypted: ".$enc." decrypted: ".$dec;

set data without base64
use DES-EDE3 method
transform your key (from hex to string)

来源：https://stackoverflow.com/questions/54420126/openssl-des-ede3-cbc-decryption-php

标签

php

encryption

3des

php-openssl

tripledes