[#EVP_DigestSqueeze]
= EVP_DigestSqueeze
:mrdocs:

Squeeze additional output from an XOF digest context (for example SHAKE).

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_DigestSqueeze(
    xref:EVP_MD_CTX.adoc[EVP_MD_CTX]* ctx,
    unsigned char* out,
    size_t outlen);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Digest context after EVP_DigestFinalXOF() / absorb phase as required by the algorithm.
| *out*
| Buffer that receives `outlen` bytes of XOF output.
| *outlen*
| Number of bytes to squeeze.
|===


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