5 CMS_get0_SignerInfos, CMS_SignerInfo_get0_signer_id, CMS_SignerInfo_cert_cmp, CMS_set1_signer_certs - CMS signedData signer functions.
9 #include <openssl/cms.h>
11 STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms);
13 int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si, ASN1_OCTET_STRING **keyid, X509_NAME **issuer, ASN1_INTEGER **sno);
14 int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert);
15 void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer);
19 The function CMS_get0_SignerInfos() returns all the CMS_SignerInfo structures
20 associated with a CMS signedData structure.
22 CMS_SignerInfo_get0_signer_id() retrieves the certificate signer identifier
23 associated with a specific CMS_SignerInfo structure B<si>. Either the
24 keyidentifier will be set in B<keyid> or B<both> issuer name and serial number
25 in B<issuer> and B<sno>.
27 CMS_SignerInfo_cert_cmp() compares the certificate B<cert> against the signer
28 identifier B<si>. It returns zero if the comparison is successful and non zero
31 CMS_SignerInfo_set1_signer_cert() sets the signers certificate of B<si> to
36 The main purpose of these functions is to enable an application to lookup
37 signers certificates using any appropriate technique when the simpler method
38 of CMS_verify() is not appropriate.
40 In typical usage and application will retrieve all CMS_SignerInfo structures
41 using CMS_get0_SignerInfo() and retrieve the identifier information using
42 CMS. It will then obtain the signer certificate by some unspecified means
43 (or return and error if it cannot be found) and set it using
44 CMS_SignerInfo_set1_signer_cert().
46 Once all signer certificates have been set CMS_verify() can be used.
48 Although CMS_get0_SignerInfos() can return NULL is an error occur B<or> if
49 there are no signers this is not a problem in practice because the only
50 error which can occur is if the B<cms> structure is not of type signedData
51 due to application error.
55 CMS_get0_SignerInfos() returns all CMS_SignerInfo structures, or NULL there
56 are no signers or an error occurs.
58 CMS_SignerInfo_get0_signer_id() returns 1 for success and 0 for failure.
60 CMS_SignerInfo_cert_cmp() returns 0 for a successful comparison and non
63 CMS_SignerInfo_set1_signer_cert() does not return a value.
65 Any error can be obtained from L<ERR_get_error(3)|ERR_get_error(3)>
69 L<ERR_get_error(3)|ERR_get_error(3)>, L<CMS_verify(3)|CMS_verify(3)>
73 These functions were first was added to OpenSSL 0.9.8