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62 lines
2.3 KiB
62 lines
2.3 KiB
=pod |
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=head1 NAME |
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CMS_add1_recipient_cert, CMS_add0_recipient_key - add recipients to a CMS enveloped data structure |
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=head1 SYNOPSIS |
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#include <openssl/cms.h> |
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CMS_RecipientInfo *CMS_add1_recipient_cert(CMS_ContentInfo *cms, X509 *recip, unsigned int flags); |
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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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=head1 DESCRIPTION |
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CMS_add1_recipient_cert() adds recipient B<recip> to CMS_ContentInfo enveloped |
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data structure B<cms> as a KeyTransRecipientInfo structure. |
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CMS_add0_recipient_key() adds symmetric key B<key> of length B<keylen> using |
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wrapping algorithm B<nid>, identifier B<id> of length B<idlen> and optional |
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values B<date>, B<otherTypeId> and B<otherType> to CMS_ContentInfo enveloped |
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data structure B<cms> as a KEKRecipientInfo structure. |
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The CMS_ContentInfo structure should be obtained from an initial call to |
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CMS_encrypt() with the flag B<CMS_PARTIAL> set. |
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=head1 NOTES |
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The main purpose of this function is to provide finer control over a CMS |
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enveloped data structure where the simpler CMS_encrypt() 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 CMS attribute utility functions. |
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OpenSSL will by default identify recipient certificates using issuer name |
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and serial number. If B<CMS_USE_KEYID> 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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Currently only AES based key wrapping algorithms are supported for B<nid>, |
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specifically: NID_id_aes128_wrap, NID_id_aes192_wrap and NID_id_aes256_wrap. |
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If B<nid> is set to B<NID_undef> then an AES wrap algorithm will be used |
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consistent with B<keylen>. |
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=head1 RETURN VALUES |
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CMS_add1_recipient_cert() and CMS_add0_recipient_key() return an internal |
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pointer to the CMS_RecipientInfo structure just added or NULL if an error |
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occurs. |
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=head1 SEE ALSO |
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L<ERR_get_error(3)|ERR_get_error(3)>, L<CMS_decrypt(3)|CMS_decrypt(3)>, |
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L<CMS_final(3)|CMS_final(3)>, |
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=head1 HISTORY |
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CMS_add1_recipient_cert() and CMS_add0_recipient_key() were added to OpenSSL |
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0.9.8 |
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=cut
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