[#EVP_EncodeUpdate]
= EVP_EncodeUpdate
:mrdocs:

Base64‐encode a chunk of input, writing complete output lines to `out.`

== Synopsis

Declared in `<openssl/evp.h>`

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

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Encode context initialized with EVP_EncodeInit().
| *out*
| Buffer receiving encoded output (may be empty if data was only buffered).
| *outl*
| Receives the number of bytes written to `out.`
| *in*
| Input octets to encode.
| *inl*
| Number of bytes at `in.`
|===


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