[#PKCS5_v2_PBE_keyivgen]
= PKCS5_v2_PBE_keyivgen
:mrdocs:

Derive a key and IV from a PKCS#5 v2 PBE AlgorithmIdentifier and initialize `ctx.`

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
PKCS5_v2_PBE_keyivgen(
    xref:EVP_CIPHER_CTX.adoc[EVP_CIPHER_CTX]* ctx,
    char const* pass,
    int passlen,
    xref:ASN1_TYPE.adoc[ASN1_TYPE]* param,
    xref:EVP_CIPHER-07.adoc[EVP_CIPHER] const* cipher,
    xref:EVP_MD.adoc[EVP_MD] const* md,
    int en_de);
----

== 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.
| *passlen*
| Length of `pass,` or ‐1 if `pass` is a NUL‐terminated string.
| *param*
| ASN.1 parameters from the PBE AlgorithmIdentifier.
| *cipher*
| Cipher suggested by the caller (may be overridden by `param).`
| *md*
| Digest suggested by the caller (may be overridden by `param).`
| *en_de*
| Non‐zero to encrypt, zero to decrypt.
|===


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