AES-256 имеет BLOCKSIZE = 128bit и KeySize = 256bit Rijndael-256 имеет BLOCKSIZE = 256bit и KeySize = 256bit. Просто AES / Rijndael 128bit идентичны. Rijndael-192 и Rijndael-256 не идентичны AES-192 и AES-256 (блок размеры и количество раундов отличаются).
There are three problems with the code you are using: As others have mentioned, your PHP code is currently using MCRYPT_RIJNDAEL_256 whereas, as documented under AES_ENCRYPT():. Encoding with a 128-bit key length is used, but you can extend it up to 256 bits by modifying the source. AES 256 CBC PKCS#7 padding in PHP. · GitHub Aug 29, 2015 PHP: openssl_decrypt - Manual
Aug 10, 2017 · Developer, Trainer, Open Source Contributor Blog About me Donate AES-256 encryption and decryption in PHP and C#
aes256 encrypt & decrypt online | encode-decode.com aes-256-gcm. blowfish. id-aes128-ccm. id-aes128-gcm. id-aes192-ccm. id-aes192-gcm. id-aes256-ccm. id-aes256-gcm. About, Data Protection & Imprint The information on the mod_rewrite cheat sheet is without any commitment. It is provided without guarantee of its accuracy or timeliness. AES encryption in mysql and php - Stack Overflow There are three problems with the code you are using: As others have mentioned, your PHP code is currently using MCRYPT_RIJNDAEL_256 whereas, as documented under AES_ENCRYPT():. Encoding with a 128-bit key length is used, but you can extend it up to 256 bits by modifying the source.
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AES-256-ECB encryption/decryption with Arduino <-> PHP openssl Oct 18, 2019 AES 256 - Free Pascal