const CFStringRef kSecCodeSignerTimestampServer = CFSTR("timestamp-url");
const CFStringRef kSecCodeSignerTimestampAuthentication = CFSTR("timestamp-authentication");
const CFStringRef kSecCodeSignerTimestampOmitCertificates = CFSTR("timestamp-omit-certificates");
const CFStringRef kSecCodeSignerTimestampServer = CFSTR("timestamp-url");
const CFStringRef kSecCodeSignerTimestampAuthentication = CFSTR("timestamp-authentication");
const CFStringRef kSecCodeSignerTimestampOmitCertificates = CFSTR("timestamp-omit-certificates");