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CMS_add0_recipient_key.3
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" CMS_add1_recipient_cert, CMS_add0_recipient_key \- add recipients to a CMS enveloped data structure .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #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); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBCMS_add1_recipient_cert()\fR adds recipient \fBrecip\fR to CMS_ContentInfo enveloped data structure \fBcms\fR as a KeyTransRecipientInfo structure. .PP \&\fBCMS_add0_recipient_key()\fR adds symmetric key \fBkey\fR of length \fBkeylen\fR using wrapping algorithm \fBnid\fR, identifier \fBid\fR of length \fBidlen\fR and optional values \fBdate\fR, \fBotherTypeId\fR and \fBotherType\fR to CMS_ContentInfo enveloped data structure \fBcms\fR as a KEKRecipientInfo structure. .PP The CMS_ContentInfo structure should be obtained from an initial call to \&\fBCMS_encrypt()\fR with the flag \fB\s-1CMS_PARTIAL\s0\fR set. .SH "NOTES" .IX Header "NOTES" The main purpose of this function is to provide finer control over a \s-1CMS\s0 enveloped data structure where the simpler \fBCMS_encrypt()\fR 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 \s-1CMS\s0 attribute utility functions. .PP OpenSSL will by default identify recipient certificates using issuer name and serial number. If \fB\s-1CMS_USE_KEYID\s0\fR 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. .PP Currently only \s-1AES\s0 based key wrapping algorithms are supported for \fBnid\fR, specifically: NID_id_aes128_wrap, NID_id_aes192_wrap and NID_id_aes256_wrap. If \fBnid\fR is set to \fBNID_undef\fR then an \s-1AES\s0 wrap algorithm will be used consistent with \fBkeylen\fR. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBCMS_add1_recipient_cert()\fR and \fBCMS_add0_recipient_key()\fR return an internal pointer to the CMS_RecipientInfo structure just added or \s-1NULL\s0 if an error occurs. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBERR_get_error\fR\|(3), \fBCMS_decrypt\fR\|(3), \&\fBCMS_final\fR\|(3), .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2008\-2016 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.
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