IPWorks S/MIME 2020 C++ Edition

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CertSubject Property

The subject of the certificate used for client authentication.


ANSI (Cross Platform)
char* GetCertSubject();
int SetCertSubject(const char* lpszCertSubject); Unicode (Windows) LPWSTR GetCertSubject();
INT SetCertSubject(LPCWSTR lpszCertSubject);
@property (nonatomic,readwrite,assign,getter=certSubject,setter=setCertSubject:) NSString* certSubject;
- (NSString*)certSubject;
- (void)setCertSubject:(NSString*)newCertSubject;

IPWORKSSMIME_EXTERNAL void* IPWORKSSMIME_CALL IPWorksSMIME_CertMgr_Get(void *lpObj, int propid, int arridx, int *lpcbVal, int64 *lpllVal);
IPWORKSSMIME_EXTERNAL int IPWORKSSMIME_CALL IPWorksSMIME_CertMgr_Set(void *lpObj, int propid, int arridx, const void *val, int cbVal);

Default Value



The subject of the certificate used for client authentication.

This property must be set after all other certificate properites are set. When this property is set, a search is performed in the current certificate store certificate with matching subject.

If a matching certificate is found, the property is set to the full subject of the matching certificate.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks a random certificate in the certificate store.

The certificate subject is a comma separated list of distinguished name fields and values. For instance "CN=www.server.com, OU=test, C=US, E=support@nsoftware.com". Common fields and their meanings are displayed below.

CNCommon Name. This is commonly a host name like www.server.com.
OUOrganizational Unit
EEmail Address

If a field value contains a comma it must be quoted.

Data Type


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IPWorks S/MIME 2020 C++ Edition - Version 20.0 [Build 8154]