[#EVP_PBE_KEYGEN]
= EVP_PBE_KEYGEN
:mrdocs:

Callback type that derives a key/IV from a password and initializes a cipher context for PBE.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef int EVP_PBE_KEYGEN(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);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Cipher context to initialize for encryption or decryption.
| *pass*
| Password bytes (not necessarily NUL‐terminated).
| *passlen*
| Length of `pass` in bytes, or ‐1 if `pass` is NUL‐terminated.
| *param*
| Algorithm‐specific ASN.1 parameters (for example a salt and iteration count).
| *cipher*
| Cipher algorithm to use.
| *md*
| Digest used in the PBE key‐derivation function.
| *en_de*
| 1 to encrypt, 0 to decrypt.
|===


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