Package com.lowagie.text.pdf
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
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Method Summary
Modifier and TypeMethodDescriptionGets the MessageDigest to digest the data imprintbyte[]
getTimeStampToken
(PdfPKCS7 caller, byte[] imprint) Get RFC 3161 timeStampToken.int
Get the time stamp token size estimate.
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Method Details
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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
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getMessageDigest
Gets the MessageDigest to digest the data imprint- Returns:
- the digest algorithm name
- Throws:
GeneralSecurityException
- a security problem
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getTimeStampToken
Get RFC 3161 timeStampToken. Method may return null indicating that timestamp should be skipped.- Parameters:
caller
- PdfPKCS7 - calling PdfPKCS7 instance (in case caller needs it)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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