Cbc | COIN-OR Branch-and-Cut solver | Development Tools library

I checked the packages via wireshark and found the unkown pricipalname error. Thanks for the hint @Samson Scharfrichter

The correct spn registration is setspn.exe -A HTTP/ourserver01.example.com exampleUser without the project itself.

AES in CBC mode doesn't care about what you encypt: it simply encrypts the bytes that you supply (after padding it to the right size in most implementations).

Does data[key] contain the right characters? If so then you need to explicitly encode to e.g. UTF-8 before calling update. Otherwise you need to make sure that data[key] gets assigned the right value of course.

Note that using let message = data[key] followed by encrypted = cipher.update(message) would show you the contents of a message in the debugger; don't be hasty!

As Richard Heap notes in the comments, there's no practical difference between them. PKCS5 is really just a special case of PKCS7. In many cases, implementations that call themselves "PKCS5" actually implement PKCS7. (This shouldn't be taken to mean that the "5" and "7" here are version numbers. They're not. They refer to specific Public Key Cryptography Standards documents. Two somewhat unrelated documents include the same basic padding strategy. There is no document devoted just to this padding strategy.)

For more details on this, see What is the difference between PKCS#5 padding and PKCS#7 padding on crypto.se.

You have 2 problems.

1. You're calling unpack() and implode() on the key and iv for no apparent reason. Don't do that.
2. Your plaintexts are different. PHP's defaults for json_encode() include escaping slashes, so "00/0000" becomes "00\/0000". You can disable this with the JSON_UNESCAPED_SLASHES flag.

You can do it by storing the selected index in an array.

Here is the idea.

If the data is encrypted in PHP you can not use the MYSQL to sort, because MYSQL would sort the data by the encrypted base64 not the original value. MYSQL is never exposed to the original, decrypted value, and therefore will never be able to sort based on it.

You need to retrieve the encrypted data from Mysql, decrypt it in PHP, then manually sort the array using usort based on the value of the decrypted data.

The C and C# code differ only in the IV. In the C code, EVP_EncryptInit_ex() passes a NULL as 5th parameter, which results in a zero IV, i.e. an IV consisting only of 0x00 values. In contrast, the C# code uses a random IV created when Aes.Create() is called.

The C# code is therefore functionally identical to the C code if a zero vector is applied in the C# code. To do this, add below the line aesAlg.Key = key:

The good news is - OpenSSL has a "built in" padding so you don't have to worry about it.

The full running code below shows you how to encrypt or decrypt a string using a 32 bytes long, randomly generated key for AES-256. The AES mode is CBC, and it is using the PKCS5/7 padding. The output of the encryption is Base64 encoded (usefull for transport via Email), of course you can leave the Base64 en-/decoding out when saving the ciphertext to a file and later read the file for decryption.

Please be aware that there are is no exception handling and the code is for educational purpose:

First of all, the ciphertexts of both codes are identical. However, the ciphertext in the Golang code is converted incorrectly.

In the C# code the content of the byte[] is printed in decimal format. To get an equivalent output in the Golang code, the content of the []byte must also be printed in decimal format, which is easily achieved with: