[#EVP_DigestInit]
= EVP_DigestInit
:mrdocs:

Initialize a digest context for hashing with `type` (legacy ENGINE‐aware form).

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_DigestInit(
    xref:EVP_MD_CTX.adoc[EVP_MD_CTX]* ctx,
    xref:EVP_MD.adoc[EVP_MD] const* type);
----

== Description

Prefer EVP_DigestInit_ex2() for new code.

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Digest context to initialize.
| *type*
| Digest method to use, or NULL to clear.
|===


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