Decrypt the given CipherText, using the symmetric algorithm
Algorithm, key Key, and initialization vector IV, to give PlainText.
CipherText must be a string, atom or list of codes or characters,
and PlainText is created as a string. Key and IV are typically
lists of bytes, though atoms and strings are also permitted.
Algorithm must be an algorithm which your copy of OpenSSL knows. See
crypto_data_encrypt/6 for an example.
Encoding to use for CipherText. Default is utf8.
Alternatives are utf8 and octet.
For block ciphers, the padding scheme to use. Default is
block. You can disable padding by supplying none here.
For authenticated encryption schemes, the tag must be specified as
a list of bytes exactly as they were generated upon encryption.
This option requires OpenSSL 1.1.0 or greater.
If the tag length is smaller than 16, this option must be used
to permit such shorter tags. This is used as a safeguard against
truncation attacks, where an attacker provides a short tag that
is easier to guess.
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