[#EVP_PBE_KEYGEN_EX]
= EVP_PBE_KEYGEN_EX
:mrdocs:

Extended password‐based encryption key‐setup callback with library context support.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef int EVP_PBE_KEYGEN_EX(xref:EVP_CIPHER_CTX.adoc[EVP_CIPHER_CTX]*, char const*, int, xref:ASN1_TYPE.adoc[ASN1_TYPE]*, xref:EVP_CIPHER-07.adoc[EVP_CIPHER] const*, xref:EVP_MD.adoc[EVP_MD] const*, int, xref:OSSL_LIB_CTX.adoc[OSSL_LIB_CTX]*, char const*);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Cipher context that receives the derived key and IV.
| *pass*
| Password bytes (may contain embedded NULs when `passlen` is set).
| *passlen*
| Length of `pass` in bytes, or ‐1 if `pass` is a NUL‐terminated string.
| *param*
| Algorithm‐specific PBE parameters (for example PBKDF2PARAM).
| *cipher*
| Cipher to initialize.
| *md*
| Digest used by the PBE scheme when applicable.
| *en_de*
| 1 to encrypt, 0 to decrypt.
| *libctx*
| Library context used when fetching algorithms, or NULL for the default.
| *propq*
| Property query for algorithm fetches, or NULL.
|===


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