com.aspose.words
Class DigitalSignatureUtil

java.lang.Object
    com.aspose.words.DigitalSignatureUtil

public abstract class DigitalSignatureUtil 
extends java.lang.Object

// By string:
Document doc = new Document(getMyDir() + "Document.DigitalSignature.docx");
String outFileName = getMyDir() + "\\Artifacts\\Document.NoSignatures.FromString.docx";

DigitalSignatureUtil.removeAllSignatures(doc.getOriginalFileName(), outFileName);

// By stream:
FileInputStream streamIn = new FileInputStream(getMyDir() + "Document.DigitalSignature.docx");
FileOutputStream streamOut = new FileOutputStream(getMyDir() + "\\Artifacts\\Document.NoSignatures.FromInputStream.doc");

DigitalSignatureUtil.removeAllSignatures(streamIn, streamOut);

public static DigitalSignatureCollection loadSignatures(java.lang.String fileName)
                                                     throws java.lang.Exception

Loads digital signatures from document.

Parameters:

fileName - Path to the document.

Returns:

Collection of digital signatures. Returns empty collection if file is not signed.

Example:

Shows how to load all existing signatures from a document.

// By string:
DigitalSignatureCollection digitalSignatures = DigitalSignatureUtil.loadSignatures(getMyDir() + "Document.DigitalSignature.docx");

// By stream:
InputStream stream = new FileInputStream(getMyDir() + "Document.DigitalSignature.docx");

digitalSignatures = DigitalSignatureUtil.loadSignatures(stream);

public static void removeAllSignatures(java.lang.String srcFileName, java.lang.String dstFileName)
                                    throws java.lang.Exception

Removes all digital signatures from source file and writes unsigned file to destination file.

Example:

Shows how to remove every signature from a document.

// By string:
Document doc = new Document(getMyDir() + "Document.DigitalSignature.docx");
String outFileName = getMyDir() + "\\Artifacts\\Document.NoSignatures.FromString.docx";

DigitalSignatureUtil.removeAllSignatures(doc.getOriginalFileName(), outFileName);

// By stream:
FileInputStream streamIn = new FileInputStream(getMyDir() + "Document.DigitalSignature.docx");
FileOutputStream streamOut = new FileOutputStream(getMyDir() + "\\Artifacts\\Document.NoSignatures.FromInputStream.doc");

DigitalSignatureUtil.removeAllSignatures(streamIn, streamOut);

public static void sign(java.lang.String srcFileName, java.lang.String dstFileName, CertificateHolder certHolder)
                     throws java.lang.Exception

Signs source document using given CertificateHolder with digital signature and writes signed document to destination file.

Document should be either LoadFormat.DOC or LoadFormat.DOCX.

Parameters:

srcFileName - The file name of the document to sign.

dstFileName - The file name of the signed document output.

certHolder - CertificateHolder object with certificate that used to sign file.

public static void sign(java.lang.String srcFileName, java.lang.String dstFileName, CertificateHolder certHolder, SignOptions signOptions)
                     throws java.lang.Exception

Signs source document using given CertificateHolder and SignOptions with digital signature and writes signed document to destination file.

Document should be either LoadFormat.DOC or LoadFormat.DOCX.

Parameters:

srcFileName - The file name of the document to sign.

dstFileName - The file name of the signed document output.

certHolder - CertificateHolder object with certificate that used to sign file.

signOptions - SignOptions object with various signing options.

Example:

Shows how to sign documents using certificate holder and sign options.

CertificateHolder certificateHolder = CertificateHolder.create(getMyDir() + "morzal.pfx", "aw");

// By string:
Document doc = new Document(getMyDir() + "Document.DigitalSignature.docx");
String outputFileName = getMyDir() + "\\Artifacts\\Document.DigitalSignature.docx";

SignOptions signOptions = new SignOptions();
signOptions.setComments("My comment");
signOptions.setSignTime(new Date());

DigitalSignatureUtil.sign(doc.getOriginalFileName(), outputFileName, certificateHolder, signOptions);

// By stream:
InputStream streamIn = new FileInputStream(getMyDir() + "Document.DigitalSignature.docx");
OutputStream streamOut = new FileOutputStream(getMyDir() + "\\Artifacts\\Document.DigitalSignature.docx");

DigitalSignatureUtil.sign(streamIn, streamOut, certificateHolder, signOptions);

Example:

Shows how to sign encrypted document opened from a file.

String outputFileName = getMyDir() + "\\Artifacts\\Document.Encrypted.docx";

Document doc = new Document(getMyDir() + "Document.Encrypted.docx", new LoadOptions("docPassword"));

// Create certificate holder from a file.
CertificateHolder certificateHolder = CertificateHolder.create(getMyDir() + "morzal.pfx", "aw");

SignOptions signOptions = new SignOptions();
signOptions.setComments("Comment");
signOptions.setSignTime(new Date());
signOptions.setDecryptionPassword("docPassword");

// Digitally sign encrypted with "docPassword" document in the specified path.
DigitalSignatureUtil.sign(doc.getOriginalFileName(), outputFileName, certificateHolder, signOptions);