/// <summary>Creates the encryption.</summary>
/// <param name="userPassword">
/// the user password. Can be null or of zero length, which is equal to
/// omitting the user password
/// </param>
/// <param name="ownerPassword">
/// the owner password. If it's null or empty, iText will generate
/// a random string to be used as the owner password
/// </param>
/// <param name="permissions">
/// the user permissions
/// The open permissions for the document can be
/// <see cref="EncryptionConstants.ALLOW_PRINTING"/>
/// ,
/// <see cref="EncryptionConstants.ALLOW_MODIFY_CONTENTS"/>
/// ,
/// <see cref="EncryptionConstants.ALLOW_COPY"/>
/// ,
/// <see cref="EncryptionConstants.ALLOW_MODIFY_ANNOTATIONS"/>
/// ,
/// <see cref="EncryptionConstants.ALLOW_FILL_IN"/>
/// ,
/// <see cref="EncryptionConstants.ALLOW_SCREENREADERS"/>
/// ,
/// <see cref="EncryptionConstants.ALLOW_ASSEMBLY"/>
/// and
/// <see cref="EncryptionConstants.ALLOW_DEGRADED_PRINTING"/>.
/// The permissions can be combined by ORing them
/// </param>
/// <param name="encryptionType">
/// the type of encryption. It can be one of
/// <see cref="EncryptionConstants.STANDARD_ENCRYPTION_40"/>
/// ,
/// <see cref="EncryptionConstants.STANDARD_ENCRYPTION_128"/>
/// ,
/// <see cref="EncryptionConstants.ENCRYPTION_AES_128"/>
/// or
/// <see cref="EncryptionConstants.ENCRYPTION_AES_256"/>.
/// Optionally
/// <see cref="EncryptionConstants.DO_NOT_ENCRYPT_METADATA"/>
/// can be
/// ORed to output the metadata in cleartext.
/// <see cref="EncryptionConstants.EMBEDDED_FILES_ONLY"/>
/// can be ORed as well.
/// Please be aware that the passed encryption types may override permissions:
/// <see cref="EncryptionConstants.STANDARD_ENCRYPTION_40"/>
/// implicitly sets
/// <see cref="EncryptionConstants.DO_NOT_ENCRYPT_METADATA"/>
/// and
/// <see cref="EncryptionConstants.EMBEDDED_FILES_ONLY"/>
/// as false;
/// <see cref="EncryptionConstants.STANDARD_ENCRYPTION_128"/>
/// implicitly sets
/// <see cref="EncryptionConstants.EMBEDDED_FILES_ONLY"/>
/// as false;
/// </param>
/// <param name="documentId">document id which will be used for encryption</param>
/// <param name="version">
/// the
/// <see cref="PdfVersion"/>
/// of the target document for encryption
/// </param>
public PdfEncryption(byte[] userPassword, byte[] ownerPassword, int permissions, int encryptionType, byte[]
documentId, PdfVersion version)
: base(new PdfDictionary())
{
this.documentId = documentId;
if (version != null && version.CompareTo(PdfVersion.PDF_2_0) >= 0)
{
permissions = FixAccessibilityPermissionPdf20(permissions);
}
int revision = SetCryptoMode(encryptionType);
switch (revision)
{
case STANDARD_ENCRYPTION_40: {
StandardHandlerUsingStandard40 handlerStd40 = new StandardHandlerUsingStandard40(this.GetPdfObject(), userPassword
, ownerPassword, permissions, encryptMetadata, embeddedFilesOnly, documentId);
this.permissions = handlerStd40.GetPermissions();
securityHandler = handlerStd40;
break;
}
case STANDARD_ENCRYPTION_128: {
StandardHandlerUsingStandard128 handlerStd128 = new StandardHandlerUsingStandard128(this.GetPdfObject(), userPassword
, ownerPassword, permissions, encryptMetadata, embeddedFilesOnly, documentId);
this.permissions = handlerStd128.GetPermissions();
securityHandler = handlerStd128;
break;
}
case AES_128: {
StandardHandlerUsingAes128 handlerAes128 = new StandardHandlerUsingAes128(this.GetPdfObject(), userPassword
, ownerPassword, permissions, encryptMetadata, embeddedFilesOnly, documentId);
this.permissions = handlerAes128.GetPermissions();
securityHandler = handlerAes128;
break;
}
case AES_256: {
StandardHandlerUsingAes256 handlerAes256 = new StandardHandlerUsingAes256(this.GetPdfObject(), userPassword
, ownerPassword, permissions, encryptMetadata, embeddedFilesOnly, version);
this.permissions = handlerAes256.GetPermissions();
securityHandler = handlerAes256;
break;
}
}
}
public PdfEncryption(PdfDictionary pdfDict, byte[] password, byte[] documentId)
: base(pdfDict)
{
SetForbidRelease();
this.documentId = documentId;
int revision = ReadAndSetCryptoModeForStdHandler(pdfDict);
switch (revision)
{
case STANDARD_ENCRYPTION_40: {
StandardHandlerUsingStandard40 handlerStd40 = new StandardHandlerUsingStandard40(this.GetPdfObject(), password
, documentId, encryptMetadata);
permissions = handlerStd40.GetPermissions();
securityHandler = handlerStd40;
break;
}
case STANDARD_ENCRYPTION_128: {
StandardHandlerUsingStandard128 handlerStd128 = new StandardHandlerUsingStandard128(this.GetPdfObject(), password
, documentId, encryptMetadata);
permissions = handlerStd128.GetPermissions();
securityHandler = handlerStd128;
break;
}
case AES_128: {
StandardHandlerUsingAes128 handlerAes128 = new StandardHandlerUsingAes128(this.GetPdfObject(), password, documentId
, encryptMetadata);
permissions = handlerAes128.GetPermissions();
securityHandler = handlerAes128;
break;
}
case AES_256: {
StandardHandlerUsingAes256 aes256Handler = new StandardHandlerUsingAes256(this.GetPdfObject(), password);
permissions = aes256Handler.GetPermissions();
encryptMetadata = aes256Handler.IsEncryptMetadata();
securityHandler = aes256Handler;
break;
}
}
}
/// <summary>Creates the encryption.</summary>
/// <remarks>
/// Creates the encryption. The userPassword and the
/// ownerPassword can be null or have zero length. In this case the ownerPassword
/// is replaced by a random string. The open permissions for the document can be
/// AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations,
/// AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting.
/// The permissions can be combined by ORing them.
/// </remarks>
/// <param name="userPassword">the user password. Can be null or empty</param>
/// <param name="ownerPassword">the owner password. Can be null or empty</param>
/// <param name="permissions">the user permissions</param>
/// <param name="encryptionType">
/// the type of encryption. It can be one of STANDARD_ENCRYPTION_40, STANDARD_ENCRYPTION_128 or ENCRYPTION_AES128.
/// Optionally DO_NOT_ENCRYPT_METADATA can be ored to output the metadata in cleartext
/// </param>
/// <exception cref="iText.Kernel.PdfException">if the document is already open</exception>
public PdfEncryption(byte[] userPassword, byte[] ownerPassword, int permissions, int encryptionType, byte[]
documentId)
: base(new PdfDictionary())
{
this.documentId = documentId;
int revision = SetCryptoMode(encryptionType);
switch (revision)
{
case STANDARD_ENCRYPTION_40: {
StandardHandlerUsingStandard40 handlerStd40 = new StandardHandlerUsingStandard40(this.GetPdfObject(), userPassword
, ownerPassword, permissions, encryptMetadata, embeddedFilesOnly, documentId);
this.permissions = handlerStd40.GetPermissions();
securityHandler = handlerStd40;
break;
}
case STANDARD_ENCRYPTION_128: {
StandardHandlerUsingStandard128 handlerStd128 = new StandardHandlerUsingStandard128(this.GetPdfObject(), userPassword
, ownerPassword, permissions, encryptMetadata, embeddedFilesOnly, documentId);
this.permissions = handlerStd128.GetPermissions();
securityHandler = handlerStd128;
break;
}
case AES_128: {
StandardHandlerUsingAes128 handlerAes128 = new StandardHandlerUsingAes128(this.GetPdfObject(), userPassword
, ownerPassword, permissions, encryptMetadata, embeddedFilesOnly, documentId);
this.permissions = handlerAes128.GetPermissions();
securityHandler = handlerAes128;
break;
}
case AES_256: {
StandardHandlerUsingAes256 handlerAes256 = new StandardHandlerUsingAes256(this.GetPdfObject(), userPassword
, ownerPassword, permissions, encryptMetadata, embeddedFilesOnly);
this.permissions = handlerAes256.GetPermissions();
securityHandler = handlerAes256;
break;
}
}
}