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CMS_add1_recipient_cert(3)          OpenSSL         CMS_add1_recipient_cert(3)

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

       libcrypto, -lcrypto

        #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);

       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.

       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.

       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.

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

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

1.0.2k                            2009-07-19        CMS_add1_recipient_cert(3)