[#CRYPTO_ocb128_decrypt]
= CRYPTO_ocb128_decrypt
:mrdocs:

Decrypt ciphertext and update the OCB authentication state.

== Synopsis

Declared in `<openssl/modes.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
CRYPTO_ocb128_decrypt(
    xref:OCB128_CONTEXT-0a.adoc[OCB128_CONTEXT]* ctx,
    unsigned char const* in,
    unsigned char* out,
    size_t len);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| OCB context ready for decryption.
| *in*
| Ciphertext bytes of length `len.`
| *out*
| Plaintext buffer of length `len` (may equal `in).`
| *len*
| Number of bytes to decrypt.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#