196 lines
6.5 KiB
Groff
196 lines
6.5 KiB
Groff
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.\" ========================================================================
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.\"
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.IX Title "CMS_add1_recipient_cert 3"
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.TH CMS_add1_recipient_cert 3 "2015-06-12" "1.0.1o" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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.Vb 1
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\& CMS_add1_recipient_cert, CMS_add0_recipient_key \- add recipients to a CMS enveloped data structure
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.Ve
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/cms.h>
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\&
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\& CMS_RecipientInfo *CMS_add1_recipient_cert(CMS_ContentInfo *cms, X509 *recip, unsigned int flags);
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\&
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\& 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);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\fICMS_add1_recipient_cert()\fR adds recipient \fBrecip\fR to CMS_ContentInfo enveloped
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data structure \fBcms\fR as a KeyTransRecipientInfo structure.
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.PP
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\&\fICMS_add0_recipient_key()\fR adds symmetric key \fBkey\fR of length \fBkeylen\fR using
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wrapping algorithm \fBnid\fR, identifier \fBid\fR of length \fBidlen\fR and optional
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values \fBdate\fR, \fBotherTypeId\fR and \fBotherType\fR to CMS_ContentInfo enveloped
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data structure \fBcms\fR as a KEKRecipientInfo structure.
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.PP
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The CMS_ContentInfo structure should be obtained from an initial call to
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\&\fICMS_encrypt()\fR with the flag \fB\s-1CMS_PARTIAL\s0\fR set.
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.SH "NOTES"
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.IX Header "NOTES"
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The main purpose of this function is to provide finer control over a \s-1CMS\s0
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enveloped data structure where the simpler \fICMS_encrypt()\fR function defaults are
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not appropriate. For example if one or more KEKRecipientInfo structures
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need to be added. New attributes can also be added using the returned
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CMS_RecipientInfo structure and the \s-1CMS\s0 attribute utility functions.
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.PP
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OpenSSL will by default identify recipient certificates using issuer name
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and serial number. If \fB\s-1CMS_USE_KEYID\s0\fR is set it will use the subject key
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identifier value instead. An error occurs if all recipient certificates do not
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have a subject key identifier extension.
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.PP
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Currently only \s-1AES\s0 based key wrapping algorithms are supported for \fBnid\fR,
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specifically: NID_id_aes128_wrap, NID_id_aes192_wrap and NID_id_aes256_wrap.
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If \fBnid\fR is set to \fBNID_undef\fR then an \s-1AES\s0 wrap algorithm will be used
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consistent with \fBkeylen\fR.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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\&\fICMS_add1_recipient_cert()\fR and \fICMS_add0_recipient_key()\fR return an internal
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pointer to the CMS_RecipientInfo structure just added or \s-1NULL\s0 if an error
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occurs.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIERR_get_error\fR\|(3), \fICMS_decrypt\fR\|(3),
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\&\fICMS_final\fR\|(3),
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.SH "HISTORY"
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.IX Header "HISTORY"
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\&\fICMS_add1_recipient_cert()\fR and \fICMS_add0_recipient_key()\fR were added to OpenSSL
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0.9.8
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