CMS_get0_SignerInfos

NAME

 CMS_get0_SignerInfos, CMS_SignerInfo_get0_signer_id, CMS_SignerInfo_cert_cmp, CMS_set1_signer_certs - CMS signedData signer functions.

SYNOPSIS

 #include <openssl/cms.h>

 STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms);

 int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si, ASN1_OCTET_STRING **keyid, X509_NAME **issuer, ASN1_INTEGER **sno);
 int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert);
 void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer);

DESCRIPTION

CMS_SignerInfo_get0_signer_id() retrieves the certificate signer identifier associated with a specific CMS_SignerInfo structure si. Either the keyidentifier will be set in keyid or both issuer name and serial number in issuer and sno.

CMS_SignerInfo_cert_cmp() compares the certificate cert against the signer identifier si. It returns zero if the comparison is successful and non zero if not.

CMS_SignerInfo_set1_signer_cert() sets the signers certificate of si to signer.  

NOTES

In typical usage and application will retrieve all CMS_SignerInfo structures using CMS_get0_SignerInfo() and retrieve the identifier information using CMS. It will then obtain the signer certificate by some unspecified means (or return and error if it cannot be found) and set it using CMS_SignerInfo_set1_signer_cert().

Once all signer certificates have been set CMS_verify() can be used.

Although CMS_get0_SignerInfos() can return NULL is an error occur or if there are no signers this is not a problem in practice because the only error which can occur is if the cms structure is not of type signedData due to application error.  

RETURN VALUES

CMS_SignerInfo_get0_signer_id() returns 1 for success and 0 for failure.

CMS_SignerInfo_cert_cmp() returns 0 for a successful comparison and non zero otherwise.

CMS_SignerInfo_set1_signer_cert() does not return a value.

Any error can be obtained from ERR_get_error(3)  

SEE ALSO

HISTORY