Zeroes key material in a QByteArray before it goes out of scope. A volatile pointer is used to prevent the compiler from eliding the write as a "dead

Encrypt or decrypt |input| using the given OpenSSL EVP cipher. When |usePadding| is false, PKCS7 padding is disabled on both ends.

CTR mode encryption and decryption are identical: each counter block is * AES-encrypted to produce a keystream block which is XORed with the * plain

! * @brief AES_set_encrypt_key takes the "userKey" and computes it to an allowed AES_Encryption_Key "key" of size "bits" * @param userKey * @param

Note – the length of the output buffer is assumed to be a multiple of 16 bytes */

! * @brief AES_set_decrypt_key takes the "userKey" and computes it to an allowed AES_Decryption_Key "key" of size "bits" * @param userKey * @param

Return the OpenSSL EVP cipher matching the given Qt-AES enum values. QAESEncryption::Aes: AES_128=0, AES_192=1, AES_256=2 QAESEncryption::Mode: ECB=0

* Static Functions * */