[#EVP_Cipher-0f]
= EVP_Cipher
:mrdocs:

Encrypt or decrypt up to `inl` bytes from `in` into `out` (legacy one‐shot).

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_Cipher(
    xref:EVP_CIPHER_CTX.adoc[EVP_CIPHER_CTX]* c,
    unsigned char* out,
    unsigned char const* in,
    unsigned int inl);
----

== Description

Prefer EVP_CipherUpdate() and EVP_CipherFinal_ex() for new code.

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *c*
| Cipher context already initialized for encrypt or decrypt.
| *out*
| Output buffer for the transformed bytes.
| *in*
| Input bytes to process.
| *inl*
| Number of input bytes; for legacy ciphers without EVP_CIPH_FLAG_CUSTOM_CIPHER must be a multiple of the block size.
|===


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