[#CMS_EncryptedData_encrypt_ex]
= CMS_EncryptedData_encrypt_ex
:mrdocs:

Create a CMS EncryptedData ContentInfo by encrypting data from a BIO (with libctx).

== Synopsis

Declared in `<openssl/cms.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:CMS_ContentInfo.adoc[CMS_ContentInfo]*
CMS_EncryptedData_encrypt_ex(
    xref:BIO.adoc[BIO]* in,
    xref:EVP_CIPHER-07.adoc[EVP_CIPHER] const* cipher,
    unsigned char const* key,
    size_t keylen,
    unsigned int flags,
    xref:OSSL_LIB_CTX.adoc[OSSL_LIB_CTX]* libctx,
    char const* propq);
----

== Description

Unless CMS_STREAM and/or CMS_PARTIAL is set, CMS_final() is called internally.

== Return Value

New EncryptedData ContentInfo, or NULL on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *in*
| BIO supplying the plaintext to encrypt.
| *cipher*
| Symmetric cipher; must support ASN.1 encoding of its parameters (AEAD not supported).
| *key*
| Encryption key bytes.
| *keylen*
| Length of `key` in bytes.
| *flags*
| CMS_* option flags such as CMS_DETACHED, CMS_STREAM, or CMS_PARTIAL.
| *libctx*
| Library context for algorithm fetches, or NULL for the default.
| *propq*
| Property query for provider selection, or NULL.
|===


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