5 CMS_SignerInfo_set1_signer_cert,
6 CMS_get0_SignerInfos, CMS_SignerInfo_get0_signer_id,
7 CMS_SignerInfo_get0_signature, CMS_SignerInfo_cert_cmp
8 - CMS signedData signer functions
12 #include <openssl/cms.h>
14 STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms);
16 int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si, ASN1_OCTET_STRING **keyid,
17 X509_NAME **issuer, ASN1_INTEGER **sno);
18 ASN1_OCTET_STRING *CMS_SignerInfo_get0_signature(CMS_SignerInfo *si);
19 int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert);
20 void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer);
24 The function CMS_get0_SignerInfos() returns all the CMS_SignerInfo structures
25 associated with a CMS signedData structure.
27 CMS_SignerInfo_get0_signer_id() retrieves the certificate signer identifier
28 associated with a specific CMS_SignerInfo structure B<si>. Either the
29 keyidentifier will be set in B<keyid> or B<both> issuer name and serial number
30 in B<issuer> and B<sno>.
32 CMS_SignerInfo_get0_signature() retrieves the signature associated with
33 B<si> in a pointer to an ASN1_OCTET_STRING structure. This pointer returned
34 corresponds to the internal signature value if B<si> so it may be read or
37 CMS_SignerInfo_cert_cmp() compares the certificate B<cert> against the signer
38 identifier B<si>. It returns zero if the comparison is successful and non zero
41 CMS_SignerInfo_set1_signer_cert() sets the signers certificate of B<si> to
46 The main purpose of these functions is to enable an application to lookup
47 signers certificates using any appropriate technique when the simpler method
48 of CMS_verify() is not appropriate.
50 In typical usage and application will retrieve all CMS_SignerInfo structures
51 using CMS_get0_SignerInfo() and retrieve the identifier information using
52 CMS. It will then obtain the signer certificate by some unspecified means
53 (or return and error if it cannot be found) and set it using
54 CMS_SignerInfo_set1_signer_cert().
56 Once all signer certificates have been set CMS_verify() can be used.
58 Although CMS_get0_SignerInfos() can return NULL is an error occur B<or> if
59 there are no signers this is not a problem in practice because the only
60 error which can occur is if the B<cms> structure is not of type signedData
61 due to application error.
65 CMS_get0_SignerInfos() returns all CMS_SignerInfo structures, or NULL there
66 are no signers or an error occurs.
68 CMS_SignerInfo_get0_signer_id() returns 1 for success and 0 for failure.
70 CMS_SignerInfo_cert_cmp() returns 0 for a successful comparison and non
73 CMS_SignerInfo_set1_signer_cert() does not return a value.
75 Any error can be obtained from L<ERR_get_error(3)>
79 L<ERR_get_error(3)>, L<CMS_verify(3)>
83 Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
85 Licensed under the OpenSSL license (the "License"). You may not use
86 this file except in compliance with the License. You can obtain a copy
87 in the file LICENSE in the source distribution or at
88 L<https://www.openssl.org/source/license.html>.