SignatureHandler
extends Object| java.lang.Object | |
| ↳ | com.pdftron.sdf.SignatureHandler |
Class Overview
A base class for SignatureHandler. SignatureHandler instances are responsible for defining the digest and cipher algorithms to sign and/or verify a PDF document. SignatureHandlers are added to PDFDoc instances by calling the PDFDoc.AddSignatureHandler method.
Summary
| Public Constructors | |||||||||||
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| SignatureHandler() | |||||||||||
| Public Methods | |||||||||||
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| void |
appendData(byte[] data)
Adds data to be signed.
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| byte[] |
createSignature()
Calculates the actual signature using client implemented signing methods.
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| String |
getName()
Gets the name of this SignatureHandler.
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| boolean |
reset()
Resets any data appending and signature calculations done so far.
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Inherited Methods | |||||||||||
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From class
java.lang.Object
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Public Constructors
public SignatureHandler ()
Public Methods
public void appendData (byte[] data)
Adds data to be signed. This data will be the raw serialized byte buffer as the PDF is being saved to any stream.
Parameters
| data | A chunk of data to be signed. |
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Throws
| PDFNetException |
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public byte[] createSignature ()
Calculates the actual signature using client implemented signing methods. The returned value (byte array) will be written as the /Contents entry in the signature dictionary.
Returns
- The calculated signature data.
Throws
| PDFNetException |
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public String getName ()
Gets the name of this SignatureHandler. The name of the SignatureHandler is what identifies this SignatureHandler from all others. This name is also added to the PDF as the value of /Filter entry in the signature dictionary.
Returns
- The name of this SignatureHandler.
Throws
| PDFNetException |
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public boolean reset ()
Resets any data appending and signature calculations done so far. This method should allow PDFNet to restart the whole signature calculation process. It is important that when this method is invoked, any data processed with the AppendData method should be discarded.
Returns
- True if there are no errors, otherwise false.
Throws
| PDFNetException |
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