Swift equivalent for php's openssl_encrypt?

Question

I am using this function to simple encrypt strings, like

    $plain_txt = "BEGIN:VCARD
    VERSION:2.1
    N:Gump;Forrest
    FN:Forrest Gump
    ORG:Bubba Gump Shrimp Co.
    TITLE:Shrimp Man
    PHOTO;GIF:http://www.example.com/dir_photos/my_photo.gif
    TEL;WORK;VOICE:(111) 555-1212
    TEL;HOME;VOICE:(404) 555-1212
    ADR;WORK:;;100 Waters Edge;Baytown;LA;30314;United States of America
    LABEL;WORK;ENCODING=QUOTED-PRINTABLE:100 Waters Edge=0D=0ABaytown, LA 30314=0D=0AUnited States of America
    ADR;HOME:;;42 Plantation St.;Baytown;LA;30314;United States of America
    LABEL;HOME;ENCODING=QUOTED-PRINTABLE:42 Plantation St.=0D=0ABaytown, LA 30314=0D=0AUnited States of America
    EMAIL;PREF;INTERNET:forrestgump@example.com
    REV:20080424T195243Z
    END:VCARD";
    echo "Plain Text = $plain_txt\n";

$encrypted_txt = encrypt_decrypt('encrypt', $plain_txt);
echo "Encrypted Text = $encrypted_txt\n";

function encrypt_decrypt($action, $string) {
$output = false;

$encrypt_method = "AES-256-CBC";
$secret_key = 'This is my secret key';
$secret_iv = 'This is my secret iv';

// hash
$key = hash('sha256', $secret_key);

// iv - encrypt method AES-256-CBC expects 16 bytes - else you will get a warning
$iv = substr(hash('sha256', $secret_iv), 0, 16);

if( $action == 'encrypt' ) {
    $output = openssl_encrypt($string, $encrypt_method, $key, 0, $iv);
        $output = base64_encode($output);
    }
    else if( $action == 'decrypt' ){
        $output = openssl_decrypt(base64_decode($string), $encrypt_method, $key, 0, $iv);
    }

    return $output;
}

And now i like to decrypt the string in swift or any other simpler way to encrypt in PHP and decrypt in swift?

Regards

[edit 1] hmmm, apparently openssl is not ios choice

Possible duplicate of [ios Swift AES Encrypt and Decrypt](http://stackoverflow.com/questions/27072021/ios-swift-aes-encrypt-and-decrypt) — Artjom B., Nov 05 '15 at 13:35
I think much difference between openssl_encrypt() and CCCrypt(). Do you fixed this problem? @alex — reza_khalafi, May 08 '17 at 10:56

score -3 · Answer 1 · answered Nov 05 '15 at 10:42

-3

Ok i am using a quick and dirty solution and it seems to work, for now

PHP side

base64_encode($plain_txt)

And on the swift side

let decodedData = NSData(base64EncodedString: plain_txt_code, options:NSDataBase64DecodingOptions(rawValue: 0))
        let decodedString = NSString(data: decodedData!, encoding: NSUTF8StringEncoding)

Now other scanner apps displays just base64 and not readable info.

answered Nov 05 '15 at 10:42

alex

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There's a huge difference between "encryption" (whose aim is for the message to be not understandable by any means by a third party who does not have the decryption key) and "encoding" which just transforms one text to another in a deterministic and easy to decode by everyone way. SHA-256 is *encryption*, Base64 is *encoding*. Are you sure you are OK with the latter? – Adam Michalik Nov 05 '15 at 10:46
1

@AdamMichalik No, SHA-256 is a hashing algorithm (one-way function). Encryption has always a counterpart, the decryption, so it must be a two-way function. SHA-256 *is not* encryption. – Artjom B. Nov 05 '15 at 13:34
1

@ArtjomB. - you're right, I messed up the terms (both AES and SHA appear in OP's code). Read `AES` in place of `SHA` in my comment. – Adam Michalik Nov 05 '15 at 13:46

Swift equivalent for php's openssl_encrypt?

1 Answers1