[#DES_encrypt1]
= DES_encrypt1
:mrdocs:

Encrypt or decrypt one DES block in place with IP and FP (deprecated low‐level core).

== Synopsis

Declared in `<openssl/des.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
void
DES_encrypt1(
    xref:DES_LONG.adoc[DES_LONG]* data,
    xref:DES_key_schedule.adoc[DES_key_schedule]* ks,
    int enc);
----

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

[cols="1,4"]
|===
| Name| Description
| *data*
| Two DES_LONG words holding the 64‐bit block in little‐endian byte order.
| *ks*
| Expanded DES key schedule.
| *enc*
| Non‐zero to encrypt, or zero to decrypt.
|===


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