com.itextpdf.text.pdf.security
Interface TSAClient

All Known Implementing Classes:
TSAClientBouncyCastle

public interface TSAClient

Time Stamp Authority client (caller) interface.

Interface used by the PdfPKCS7 digital signature builder to call Time Stamp Authority providing RFC 3161 compliant time stamp token.

Since:
2.1.6
Author:
Martin Brunecky, 07/17/2007

Method Summary
 String getDigestAlgorithm()
          Gets the algorithm used to digest the data imprint
 byte[] getTimeStampToken(byte[] imprint)
          Get RFC 3161 timeStampToken.
 int getTokenSizeEstimate()
          Get the time stamp token size estimate.
 

Method Detail

getTokenSizeEstimate

int getTokenSizeEstimate()
Get the time stamp token size estimate. Implementation must return value large enough to accomodate the entire token returned by getTimeStampToken() _prior_ to actual getTimeStampToken() call.

Returns:
an estimate of the token size

getDigestAlgorithm

String getDigestAlgorithm()
Gets the algorithm used to digest the data imprint

Returns:
the digest algorithm name

getTimeStampToken

byte[] getTimeStampToken(byte[] imprint)
                         throws Exception
Get RFC 3161 timeStampToken. Method may return null indicating that timestamp should be skipped.

Parameters:
imprint - byte[] - data imprint to be time-stamped
Returns:
byte[] - encoded, TSA signed data of the timeStampToken
Throws:
Exception - - TSA request failed


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