The problem with PHP mcrypt, it is abandonware. Probably the only problems non-standard null padding used by mcrypt. To decrypt with another implementation that does not support null padding (it is non-standard) just decrypt with no padding and then remove the null padding. If you also must encrypt the same as mcrypt just add null. The problem with PHP mcrypt. Upgrading my encryption library from Mcrypt to. Null padding used by mcrypt. To decrypt with another implementation that.

While Johns answer is good, using base64 encoding just to fix the binary safety issue is overkill and will make your encrypted files 33% larger than the original. Here is my PHP Implementation of the AES Crypt file format which solves all the above issues transparently.

It is binary safe and includes authenticated encryption. Since it uses the open source aes crypt file format (.aes) it is fully compatible with other.aes software. The interface is pretty simple whether you are encrypting or decrypting. You just give it a source file and password. You should not be using Mcrypt to encrypt/decrypt data. As shown in your question, and in the accepted answer, the data is not authenticated, which means it will fall victim to chosen ciphertext attacks.

Further, a great deal of effort has been done to make sure that developers put together cryptographic primitives correctly. As such, instead of Mcrypt, you should be using libsodium for your PHP projects. Libsodium is a fork of NaCl. NaCl/libsodium is written to remove a lot of the cryptographic pitfalls that developers find themselves in, such as timing attacks with verification of MAC tags.

Install Ldap Module Php Windows there. Mcrypt is deprecated in PHP 7.1, and libsodim is the preferred way to handle cryptography in PHP. Using libsodium in your PHP project is easy, and secure. Scott Arciszewski has written an extensive ebook on using libsodium with PHP. It's worth the read for anyone doing PHP cryptography.

While the scenario may not necessarily be common in which you would want to encrypt your PHP code and execute it, it is something that I would consider an interesting discussion nonetheless. I fully support free and open source software, however if you are developing an application that manages or monitors systems or services or an application that needs to reside in a “hostile” environment, it might be pertinent to consider encrypting the code before executing it. This protects your code from even being read (and ultimately executed) unless the proper key is passed in order to decrypt it. In the following example & breakdown, we will be (separately) using both the Mcrypt and OpenSSL to encrypt a block of code with a specified key. Liebermann Piccolo Concerto Pdf Printer. We will then use that same key to decrypt the encrypted code in order to run it.