mcrypt

NOTE: The libraries MCrypt support depend on have not been updated in years and MCrypt should no longer be considered a viable or secure method of encrypting data. What's more, MCrypt has been deprecated in PHP 5, and removed entirely in PHP 7. If you have any code that runs MCrypt you should refactor it to use a more modern encryption library. Does anyone know why this error message: (Call to undefined function mcrypt_encrypt() ) displays when I run the following code below? Am I missing some steps perhaps any setting in PHP I have to do before this code can work? $key = 'password to (en/de

Here is a PHP demo script that encrypts and decrypts data: <? $encryptionkey = 'h8y2p9d1'; $card_nbr = "1234"; echo "original card_nbr: $card_nbr <br>\n"; $card_nbr_encrypted=encrypt_data($card_nbr); echo "card_nbr_encrypted: $card_nbr_encrypted <br>\n"; $card_nbr_decrypted=decrypt_data($card_nbr_encrypted); echo "card_nbr_decrypted: $card_nbr_decrypted <br>\n"; $len=strlen($card_nbr_decrypted); echo "length: $len <br>\n"; function encrypt_data($text){ global $encryptionkey; $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB); $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);

mcrypt_decrypt(): Key of size 15 not supported by this algorithm. Only keys of sizes 16, 24 or 32 supported How Can I fix this issue? my key is set - can not change it. It has to be a local change, I think my local PHP version is too advanced for the project I loaded. How can I fix this? Did you update to 5.6? It says Invalid key and iv sizes are no longer accepted. mcrypt_decrypt() will now throw a warning and return FALSE if the inputs are invalid. Previously keys and IVs were padded with '\0' bytes to the next valid size. Reference Read the last line of that quote, and there you will find

I'm generating data to send from a Ruby stack to a PHP stack. I'm using the OpenSSL::Cipher library on the Ruby side and the 'mcrypt' library in PHP. When I encrypt using 'aes-256-cbc' (256-bit block size) in Ruby I need to use MCRYPT_RIJNDAEL_128 (128-bit block size) in PHP to decrypt it. I suspect the Ruby code that is broken, because the cipher.iv_len is 16; I believe it should be 32: >> cipher = OpenSSL::Cipher::Cipher.new('aes-128-cbc') => #<OpenSSL::Cipher::Cipher:0x3067c5c> >> cipher.key_len => 16 >> cipher.iv_len => 16 >> cipher = OpenSSL::Cipher::Cipher.new('aes-256-cbc') => #<OpenSSL

So guys, there's plenty of different ciphers available - but which one is the safest to use nowadays? List: http://www.php.net/manual/en/mcrypt.ciphers.php Thomas Pornin If unsure use AES (also known as "Rijndael") with a 128-bit key. If you have developed some kind of fetish about key size then you could fulfill your irrational qualms by selecting a larger key, e.g. 192 or 256 bits; the extra cost is not high (+40% workload for AES-256, compared to AES-128, and it takes a very very fast network to actually observe that difference). Beware that, regardless of the key size chosen, the correct

I have been trying to implement mcrypt encryption/ decryption technique on both server end, PHP and client end. I am trying to use mcrypt.js library at the moment as: <?php $key = 'testtesttesttesttesttesttesttest'; function string_encrypt($string, $key) { $crypted_text = mcrypt_encrypt( MCRYPT_RIJNDAEL_128, $key, $string, MCRYPT_MODE_ECB ); return base64_encode($crypted_text); } function string_decrypt($encrypted_string, $key) { $decrypted_text = mcrypt_decrypt( MCRYPT_RIJNDAEL_128, $key, base64_decode($encrypted_string), MCRYPT_MODE_ECB ); return trim($decrypted_text); } echo 'Provided Text: