Updated: 2022/Sep/29

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CMS_EnvelopedData_create(3)         OpenSSL        CMS_EnvelopedData_create(3)



NAME
       CMS_EnvelopedData_create_ex, CMS_EnvelopedData_create,
       CMS_AuthEnvelopedData_create, CMS_AuthEnvelopedData_create_ex - Create
       CMS envelope

LIBRARY
       libcrypto, -lcrypto

SYNOPSIS
        #include <openssl/cms.h>

        CMS_ContentInfo *
        CMS_EnvelopedData_create_ex(const EVP_CIPHER *cipher, OSSL_LIB_CTX *libctx,
                                    const char *propq);
        CMS_ContentInfo *CMS_EnvelopedData_create(const EVP_CIPHER *cipher);

        CMS_ContentInfo *
        CMS_AuthEnvelopedData_create_ex(const EVP_CIPHER *cipher, OSSL_LIB_CTX *libctx,
                                        const char *propq);
        CMS_ContentInfo *CMS_AuthEnvelopedData_create(const EVP_CIPHER *cipher);

DESCRIPTION
       CMS_EnvelopedData_create_ex() creates a CMS_ContentInfo structure with
       a type NID_pkcs7_enveloped. cipher is the symmetric cipher to use.  The
       library context libctx and the property query propq are used when
       retrieving algorithms from providers.

       CMS_AuthEnvelopedData_create_ex() creates a CMS_ContentInfo structure
       with a type NID_id_smime_ct_authEnvelopedData. cipher is the symmetric
       AEAD cipher to use. Currently only AES variants with GCM mode are
       supported. The library context libctx and the property query propq are
       used when retrieving algorithms from providers.

       The algorithm passed in the cipher parameter must support ASN1 encoding
       of its parameters.

       The recipients can be added later using CMS_add1_recipient_cert(3) or
       CMS_add0_recipient_key(3).

       The CMS_ContentInfo structure needs to be finalized using CMS_final(3)
       and then freed using CMS_ContentInfo_free(3).

       CMS_EnvelopedData_create() and  CMS_AuthEnvelopedData_create are
       similar to CMS_EnvelopedData_create_ex() and
       CMS_AuthEnvelopedData_create_ex() but use default values of NULL for
       the library context libctx and the property query propq.

NOTES
       Although CMS_EnvelopedData_create() and CMS_AuthEnvelopedData_create()
       allocate a new CMS_ContentInfo structure, they are not usually used in
       applications.  The wrappers CMS_encrypt(3) and CMS_decrypt(3) are often
       used instead.

RETURN VALUES
       If the allocation fails, CMS_EnvelopedData_create() and
       CMS_AuthEnvelopedData_create() return NULL and set an error code that
       can be obtained by ERR_get_error(3). Otherwise they return a pointer to
       the newly allocated structure.

SEE ALSO
       ERR_get_error(3), CMS_encrypt(3), CMS_decrypt(3), CMS_final(3)

HISTORY
       The CMS_EnvelopedData_create_ex() method was added in OpenSSL 3.0.

COPYRIGHT
       Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (the "License").  You may not use
       this file except in compliance with the License.  You can obtain a copy
       in the file LICENSE in the source distribution or at
       <https://www.openssl.org/source/license.html>.



3.0.12                            2023-05-07       CMS_EnvelopedData_create(3)