What is the equivalent PHP decryption for this Java encryption method?

Question

I have the following Java encryption method, and I'd like to know what the equivalent PHP decryption for it is, if there is one. If there is not an equivalent PHP decryption function for PHP, then what other options do I have? Thanks in advance.

    private String encrypt(String string, String key) {
    StringBuilder enc = new StringBuilder();
    try {
        Mac mac = Mac.getInstance("HMACSHA256");
        SecretKeySpec secret = new SecretKeySpec(key.getBytes(), "HMACSHA256");
        mac.init(secret);
        byte[] digest = mac.doFinal(string.getBytes());
        for (byte b : digest) {
            String hex = Integer.toHexString(0xff & b);
            if (hex.length() == 1)
                enc.append('0');
            enc.append(hex);
        }
    } catch (Exception e) {
    }
    return enc.toString();
}

Good to know you learned from your closed question.

Luiggi Mendoza
– Luiggi Mendoza

2013-04-03 12:26:53 +00:00
Commented Apr 3, 2013 at 12:26 — Luiggi Mendoza
– Luiggi Mendoza, Commented Apr 3, 2013 at 12:26

Pradeep Pati · Accepted Answer · 2013-04-03 05:23:34Z

1

SHA algorithms are one way hashes, which means you can never decrypt them.

answered Apr 3, 2013 at 5:23

Pradeep Pati

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luxer · Accepted Answer · 2013-04-03 05:37:22Z

0

Just take a look at php.net: http://www.php.net/manual/en/function.hash-hmac.php

An equal method would be

hash_hmac("sha256", $data, $key, false);

And of course its not an encryption, but an hash function. So its non reversible.

answered Apr 3, 2013 at 5:37

luxer

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2 Comments

Hat Over a year ago

Thanks for your answer. Is there an alternative you could suggest to sha256, that is reversible?

luxer Over a year ago

You have to use an encryption function as already asked in: stackoverflow.com/questions/9262109/…

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