[#OSSL_DECODER_CTX_set_passphrase_cb]
= OSSL_DECODER_CTX_set_passphrase_cb
:mrdocs:

Set an OSSL_PASSPHRASE_CALLBACK used to prompt for a passphrase.

== Synopsis

Declared in `<openssl/decoder.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
OSSL_DECODER_CTX_set_passphrase_cb(
    xref:OSSL_DECODER_CTX.adoc[OSSL_DECODER_CTX]* ctx,
    xref:OSSL_PASSPHRASE_CALLBACK.adoc[OSSL_PASSPHRASE_CALLBACK]* cb,
    void* cbarg);
----

== Return Value

1 on success, or 0 on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Decoder context to configure.
| *cb*
| Passphrase callback invoked when decryption needs a secret.
| *cbarg*
| Opaque argument passed to `cb.`
|===


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