[#AES_decrypt]
= AES_decrypt
:mrdocs:

Decrypt one 16‐byte AES block with a key schedule (deprecated; prefer EVP).

== Synopsis

Declared in `<openssl/aes.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
void
AES_decrypt(
    unsigned char const* in,
    unsigned char* out,
    xref:AES_KEY.adoc[AES_KEY] const* key);
----

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[Deprecated^]. Use of this entity is allowed but discouraged.
====
== Parameters

[cols="1,4"]
|===
| Name| Description
| *in*
| 16‐byte ciphertext block.
| *out*
| 16‐byte plaintext buffer (may equal `in).`
| *key*
| Expanded AES decrypt key from AES_set_decrypt_key().
|===


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