Enc | idiomatic way to encode , decode and hashing | Hashing library

The VB code derives the key from the passhprase with MD5. TripleDES (aka 3DES) with a 16 bytes key (2TDEA) is used as the algorithm. ECB is applied as the mode. A possible decryption with CryptoJS is:

To solve the compilation error, the case class should be defined outside of the method run.

Instead of

You are getting this issue due to index being different.

Your ds may have different index (not starting from 0 and continuous) but your one hot label dataframe is starting from 0 and continuous.

So when you are going for concatenation. Since indices are not same you are getting nan there.

Please check the shape also to confirm whether the issue due to indices mismatch or not.

To solve:

Can you try something like this :-

You you just want to convert string to hex. First you need to convert it to bytes. This can be done by using string method .encode(). Then you can convert it to hex by using .hex() method.

I want to send the messages as numbers without enc-dec to string.

Do you understand why encoding and decoding is necessary? Data is passed through networks as bytes. Applications are responsible for translating bytes to and from higher level data structures. To be very blunt, you cannot send/receive messages without encoding and decoding to bytes.

Do not use for file in $something. Read https://mywiki.wooledge.org/BashFAQ/001

Check your scripts with https://shellcheck.net

To handle whitespace use zero separated streams.

In shell, try to write one long pipelines. Along:

The error message seems fairly straight-forward to me: the key size you used isn't supported by that library. In fact, you appear to have only pasted part of the message, which goes on to list the key sizes which are supported: https://github.com/phpseclib/phpseclib/blob/7e38313802b62606cf27ddf573a7c47e88b5d33f/phpseclib/Crypt/AES.php#L118

'Key of size ' . strlen($key) . ' not supported by this algorithm. Only keys of sizes 16, 24 or 32 supported'

So your problem is not understanding what the PHP can do, but understanding what the JS is doing with your input.

The clue to that is in the CryptoJS docs:

CryptoJS supports AES-128, AES-192, and AES-256. It will pick the variant by the size of the key you pass in. If you use a passphrase, then it will generate a 256-bit key.

So the library agrees that there are three valid key lengths, but supports passing in a "passphrase" instead which will be used to generate a key. The exact algorithm it uses to do that isn't documented; presumably it uses some Key Derivation Function with fixed parameters, so that the same passphrase will always produce the same key. If you really need to emulate it, you'll need to trace through the source code.

If you just need code that's compatible with both libraries, generate a random key of one of the supported lengths, and use that in both places.

The deprecated methods crypto.createCipher() and crypto.createDecipher() apply the proprietary OpenSSL function EVP_BytesToKey() to derive a 32 bytes key and a 16 bytes IV from a password. No salt is used, the digest MD5 and an iteration count of 1. This algorithm is very insecure, which is why both methods are deprecated.

The posted code applies aes-256-cbc (i.e. AES-256 in CBC mode) and just this key derivation to derive a key/IV pair. Since the key derivation does not use a salt, always the same ciphertext results for the same plaintext and password. E.g. for: