CMS_add1_recipient_cert
Section: OpenSSL (3)
Updated: 2017-05-25
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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
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- NOTES
-
- RETURN VALUES
-
- SEE ALSO
-
- HISTORY
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