5 CMS_get0_SignerInfos, CMS_SignerInfo_get0_signer_id, CMS_SignerInfo_get0_signature, CMS_SignerInfo_cert_cmp, CMS_set1_signer_cert - 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 ASN1_OCTET_STRING *CMS_SignerInfo_get0_signature(CMS_SignerInfo *si);
15 int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert);
16 void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer);
20 The function CMS_get0_SignerInfos() returns all the CMS_SignerInfo structures
21 associated with a CMS signedData structure.
23 CMS_SignerInfo_get0_signer_id() retrieves the certificate signer identifier
24 associated with a specific CMS_SignerInfo structure B<si>. Either the
25 keyidentifier will be set in B<keyid> or B<both> issuer name and serial number
26 in B<issuer> and B<sno>.
28 CMS_SignerInfo_get0_signature() retrieves the signature associated with
29 B<si> in a pointer to an ASN1_OCTET_STRING structure. This pointer returned
30 corresponds to the internal signature value if B<si> so it may be read or
33 CMS_SignerInfo_cert_cmp() compares the certificate B<cert> against the signer
34 identifier B<si>. It returns zero if the comparison is successful and non zero
37 CMS_SignerInfo_set1_signer_cert() sets the signers certificate of B<si> to
42 The main purpose of these functions is to enable an application to lookup
43 signers certificates using any appropriate technique when the simpler method
44 of CMS_verify() is not appropriate.
46 In typical usage and application will retrieve all CMS_SignerInfo structures
47 using CMS_get0_SignerInfo() and retrieve the identifier information using
48 CMS. It will then obtain the signer certificate by some unspecified means
49 (or return and error if it cannot be found) and set it using
50 CMS_SignerInfo_set1_signer_cert().
52 Once all signer certificates have been set CMS_verify() can be used.
54 Although CMS_get0_SignerInfos() can return NULL is an error occur B<or> if
55 there are no signers this is not a problem in practice because the only
56 error which can occur is if the B<cms> structure is not of type signedData
57 due to application error.
61 CMS_get0_SignerInfos() returns all CMS_SignerInfo structures, or NULL there
62 are no signers or an error occurs.
64 CMS_SignerInfo_get0_signer_id() returns 1 for success and 0 for failure.
66 CMS_SignerInfo_cert_cmp() returns 0 for a successful comparison and non
69 CMS_SignerInfo_set1_signer_cert() does not return a value.
71 Any error can be obtained from L<ERR_get_error(3)|ERR_get_error(3)>
75 L<ERR_get_error(3)|ERR_get_error(3)>, L<CMS_verify(3)|CMS_verify(3)>
79 These functions were first was added to OpenSSL 0.9.8