[#EVP_Q_digest]
= EVP_Q_digest
:mrdocs:

One‐shot digest of `data` using a fetched algorithm name.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_Q_digest(
    xref:OSSL_LIB_CTX.adoc[OSSL_LIB_CTX]* libctx,
    char const* name,
    char const* propq,
    void const* data,
    size_t datalen,
    unsigned char* md,
    size_t* mdlen);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *libctx*
| Library context for the fetch, or NULL for the default.
| *name*
| Digest algorithm name (for example "SHA256").
| *propq*
| Property query for the fetch, or NULL.
| *data*
| Bytes to hash.
| *datalen*
| Number of bytes at `data.`
| *md*
| Output buffer for the digest (at least the algorithm size).
| *mdlen*
| Optional in/out length of `md;` updated to the digest size.
|===


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