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136 .IX Title "CMS_add1_recipient_cert 3"
137 .TH CMS_add1_recipient_cert 3 "2008-04-10" "1.1.0-dev" "OpenSSL"
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144 \& CMS_add1_recipient_cert, CMS_add0_recipient_key \- add recipients to a CMS enveloped data structure
149 .IX Header "SYNOPSIS"
151 \& #include <openssl/cms.h>
153 \& CMS_RecipientInfo *CMS_add1_recipient_cert(CMS_ContentInfo *cms, X509 *recip, unsigned int flags);
155 \& 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);
158 .IX Header "DESCRIPTION"
159 \&\fICMS_add1_recipient_cert()\fR adds recipient \fBrecip\fR to CMS_ContentInfo enveloped
160 data structure \fBcms\fR as a KeyTransRecipientInfo structure.
162 \&\fICMS_add0_recipient_key()\fR adds symmetric key \fBkey\fR of length \fBkeylen\fR using
163 wrapping algorithm \fBnid\fR, identifier \fBid\fR of length \fBidlen\fR and optional
164 values \fBdate\fR, \fBotherTypeId\fR and \fBotherType\fR to CMS_ContentInfo enveloped
165 data structure \fBcms\fR as a KEKRecipientInfo structure.
167 The CMS_ContentInfo structure should be obtained from an initial call to
168 \&\fICMS_encrypt()\fR with the flag \fB\s-1CMS_PARTIAL\s0\fR set.
171 The main purpose of this function is to provide finer control over a \s-1CMS\s0
172 enveloped data structure where the simpler \fICMS_encrypt()\fR function defaults are
173 not appropriate. For example if one or more KEKRecipientInfo structures
174 need to be added. New attributes can also be added using the returned
175 CMS_RecipientInfo structure and the \s-1CMS\s0 attribute utility functions.
177 OpenSSL will by default identify recipient certificates using issuer name
178 and serial number. If \fB\s-1CMS_USE_KEYID\s0\fR is set it will use the subject key
179 identifier value instead. An error occurs if all recipient certificates do not
180 have a subject key identifier extension.
182 Currently only \s-1AES\s0 based key wrapping algorithms are supported for \fBnid\fR,
183 specifically: NID_id_aes128_wrap, NID_id_aes192_wrap and NID_id_aes256_wrap.
184 If \fBnid\fR is set to \fBNID_undef\fR then an \s-1AES\s0 wrap algorithm will be used
185 consistent with \fBkeylen\fR.
187 .IX Header "RETURN VALUES"
188 \&\fICMS_add1_recipient_cert()\fR and \fICMS_add0_recipient_key()\fR return an internal
189 pointer to the CMS_RecipientInfo structure just added or \s-1NULL\s0 if an error
192 .IX Header "SEE ALSO"
193 \&\fIERR_get_error\fR\|(3), \fICMS_decrypt\fR\|(3),
194 \&\fICMS_final\fR\|(3),
197 \&\fICMS_add1_recipient_cert()\fR and \fICMS_add0_recipient_key()\fR were added to OpenSSL