[#EVP_CIPHER_CTX_rand_key]
= EVP_CIPHER_CTX_rand_key
:mrdocs:

Generate a random key suitable for the cipher currently set on `ctx.`

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_CIPHER_CTX_rand_key(
    xref:EVP_CIPHER_CTX.adoc[EVP_CIPHER_CTX]* ctx,
    unsigned char* key);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Cipher context whose algorithm determines the key length.
| *key*
| Buffer receiving the generated key (at least EVP_CIPHER_CTX_get_key_length() bytes).
|===


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