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Foxit PDF SDK
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Time stamp server manager is used to manage some time stamp servers. The default time stamp server in this manager will be used in default signature callback for filter "Adobe.PPKLite" with sub filter "ETSI.CAdES.detached" and filter "Adobe.PPKLite" with sub filter "ETSI.RFC3161". So before signing or verifying signatures in these filter-subfitler pair by using default signature callback in Foxit PDF SDK, please ensure that a valid fsdk.TimeStampCallback object has been set through fsdk.LibrarySetTimeStampCallback or the time stamp server manager has been initialized and the default server is set, if both are set, Foxit PDF SDK will use the fsdk.TimeStampCallback .