CMS_get0_RecipientInfos(3) OpenSSL CMS_get0_RecipientInfos(3)NAME
CMS_get0_RecipientInfos, CMS_RecipientInfo_type, CMS_RecipientInfo_ktri_get0_signer_id,CMS_RecipientInfo_ktri_cert_cmp, CMS_RecipientInfo_set0_pkey, CMS_RecipientInfo_kekri_get0_id, CMS_RecipientInfo_kekri_id_cmp, CMS_RecipientInfo_set0_key, CMS_RecipientInfo_decrypt - CMS envelopedData RecipientInfo routines
SYNOPSIS
#include <openssl/cms.h>
STACK_OF(CMS_RecipientInfo) *CMS_get0_RecipientInfos(CMS_ContentInfo *cms);
int CMS_RecipientInfo_type(CMS_RecipientInfo *ri);
int CMS_RecipientInfo_ktri_get0_signer_id(CMS_RecipientInfo *ri, ASN1_OCTET_STRING **keyid, X509_NAME **issuer, ASN1_INTEGER **sno);
int CMS_RecipientInfo_ktri_cert_cmp(CMS_RecipientInfo *ri, X509 *cert);
int CMS_RecipientInfo_set0_pkey(CMS_RecipientInfo *ri, EVP_PKEY *pkey);
int CMS_RecipientInfo_kekri_get0_id(CMS_RecipientInfo *ri, X509_ALGOR **palg, ASN1_OCTET_STRING **pid, ASN1_GENERALIZEDTIME **pdate, ASN1_OBJECT **potherid, ASN1_TYPE **pothertype);
int CMS_RecipientInfo_kekri_id_cmp(CMS_RecipientInfo *ri, const unsigned char *id, size_t idlen);
int CMS_RecipientInfo_set0_key(CMS_RecipientInfo *ri, unsigned char *key, size_t keylen);
int CMS_RecipientInfo_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri);
DESCRIPTION
The function CMS_get0_RecipientInfos() returns all the
CMS_RecipientInfo structures associated with a CMS EnvelopedData
structure.
CMS_RecipientInfo_type() returns the type of CMS_RecipientInfo
structure ri. It will currently return CMS_RECIPINFO_TRANS,
CMS_RECIPINFO_AGREE, CMS_RECIPINFO_KEK, CMS_RECIPINFO_PASS, or
CMS_RECIPINFO_OTHER.
CMS_RecipientInfo_ktri_get0_signer_id() retrieves the certificate
recipient identifier associated with a specific CMS_RecipientInfo
structure ri, which must be of type CMS_RECIPINFO_TRANS. Either the
keyidentifier will be set in keyid or both issuer name and serial
number in issuer and sno.
CMS_RecipientInfo_ktri_cert_cmp() compares the certificate cert against
the CMS_RecipientInfo structure ri, which must be of type
CMS_RECIPINFO_TRANS. It returns zero if the comparison is successful
and non zero if not.
CMS_RecipientInfo_set0_pkey() associates the private key pkey with the
CMS_RecipientInfo structure ri, which must be of type
CMS_RECIPINFO_TRANS.
CMS_RecipientInfo_kekri_get0_id() retrieves the key information from
the CMS_RecipientInfo structure ri which must be of type
CMS_RECIPINFO_KEK. Any of the remaining parameters can be NULL if the
application is not interested in the value of a field. Where a field is
optional and absent NULL will be written to the corresponding
parameter. The keyEncryptionAlgorithm field is written to palg, the
keyIdentifier field is written to pid, the date field if present is
written to pdate, if the other field is present the components
keyAttrId and keyAttr are written to parameters potherid and
pothertype.
CMS_RecipientInfo_kekri_id_cmp() compares the ID in the id and idlen
parameters against the keyIdentifier CMS_RecipientInfo structure ri,
which must be of type CMS_RECIPINFO_KEK. It returns zero if the
comparison is successful and non zero if not.
CMS_RecipientInfo_set0_key() associates the symmetric key key of length
keylen with the CMS_RecipientInfo structure ri, which must be of type
CMS_RECIPINFO_KEK.
CMS_RecipientInfo_decrypt() attempts to decrypt CMS_RecipientInfo
structure ri in structure cms. A key must have been associated with the
structure first.
NOTES
The main purpose of these functions is to enable an application to
lookup recipient keys using any appropriate technique when the simpler
method of CMS_decrypt() is not appropriate.
In typical usage and application will retrieve all CMS_RecipientInfo
structures using CMS_get0_RecipientInfos() and check the type of each
using CMS_RecpientInfo_type(). Depending on the type the
CMS_RecipientInfo structure can be ignored or its key identifier data
retrieved using an appropriate function. Then if the corresponding
secret or private key can be obtained by any appropriate means it can
then associated with the structure and CMS_RecpientInfo_decrypt()
called. If successful CMS_decrypt() can be called with a NULL key to
decrypt the enveloped content.
RETURN VALUESCMS_get0_RecipientInfos() returns all CMS_RecipientInfo structures, or
NULL if an error occurs.
CMS_RecipientInfo_ktri_get0_signer_id(), CMS_RecipientInfo_set0_pkey(),
CMS_RecipientInfo_kekri_get0_id(), CMS_RecipientInfo_set0_key() and
CMS_RecipientInfo_decrypt() return 1 for success or 0 if an error
occurs.
CMS_RecipientInfo_ktri_cert_cmp() and CMS_RecipientInfo_kekri_cmp()
return 0 for a successful comparison and non zero otherwise.
Any error can be obtained from ERR_get_error(3).
SEE ALSOERR_get_error(3), CMS_decrypt(3)HISTORY
These functions were first was added to OpenSSL 0.9.8
1.0.1g 2014-03-17 CMS_get0_RecipientInfos(3)
