NAME

        CMS_add1_recipient_cert, CMS_add0_recipient_key - add recipients to a CMS enveloped data structure

SYNOPSIS

        #include <openssl/cms.h>

        CMS_RecipientInfo *CMS_add1_recipient_cert(CMS_ContentInfo *cms, X509 *recip, unsigned int flags);

        CMS_RecipientInfo *CMS_add0_recipient_key(CMS_ContentInfo *cms, int nid, unsigned char *key, size_t keylen, unsigned char *id, size_t idlen, ASN1_GENERALIZEDTIME *date, ASN1_OBJECT *otherTypeId, ASN1_TYPE *otherType);

DESCRIPTION

       CMS_add1_recipient_cert() adds recipient recip to CMS_ContentInfo enveloped data structure cms as a
       KeyTransRecipientInfo structure.

       CMS_add0_recipient_key() adds symmetric key key of length keylen using wrapping algorithm nid, identifier
       id of length idlen and optional values date, otherTypeId and otherType to CMS_ContentInfo enveloped data
       structure cms as a KEKRecipientInfo structure.

       The CMS_ContentInfo structure should be obtained from an initial call to CMS_encrypt() with the flag
       CMS_PARTIAL set.

NOTES

       The main purpose of this function is to provide finer control over a CMS enveloped data structure where
       the simpler CMS_encrypt() function defaults are not appropriate. For example if one or more
       KEKRecipientInfo structures need to be added. New attributes can also be added using the returned
       CMS_RecipientInfo structure and the CMS attribute utility functions.

       OpenSSL will by default identify recipient certificates using issuer name and serial number. If
       CMS_USE_KEYID is set it will use the subject key identifier value instead. An error occurs if all
       recipient certificates do not have a subject key identifier extension.

       Currently only AES based key wrapping algorithms are supported for nid, specifically: NID_id_aes128_wrap,
       NID_id_aes192_wrap and NID_id_aes256_wrap.  If nid is set to NID_undef then an AES wrap algorithm will be
       used consistent with keylen.

RETURN VALUES

       CMS_add1_recipient_cert() and CMS_add0_recipient_key() return an internal pointer to the
       CMS_RecipientInfo structure just added or NULL if an error occurs.

SEE ALSO

       ERR_get_error(3), CMS_decrypt(3), CMS_final(3),

HISTORY

       CMS_add1_recipient_cert() and CMS_add0_recipient_key() were added to OpenSSL 0.9.8

1.0.1f                                             2014-01-06                      CMS_add1_recipient_cert(3SSL)