http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
abstract class org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine
  minor version: 0
  major version: 59
  flags: flags: (0x0420) ACC_SUPER, ACC_ABSTRACT
  this_class: org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine
  super_class: java.lang.Object
{
  protected final int encryptionLengthInBytes;
    descriptor: I
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL

  protected final int permissions;
    descriptor: I
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL

  private final java.lang.String userPassword;
    descriptor: Ljava/lang/String;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final java.lang.String ownerPassword;
    descriptor: Ljava/lang/String;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  protected byte[] oValue;
    descriptor: [B
    flags: (0x0004) ACC_PROTECTED

  protected byte[] uValue;
    descriptor: [B
    flags: (0x0004) ACC_PROTECTED

  protected byte[] preparedUserPassword;
    descriptor: [B
    flags: (0x0004) ACC_PROTECTED

  protected byte[] preparedOwnerPassword;
    descriptor: [B
    flags: (0x0004) ACC_PROTECTED

  final org.apache.fop.pdf.PDFEncryptionJCE this$0;
    descriptor: Lorg/apache/fop/pdf/PDFEncryptionJCE;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(org.apache.fop.pdf.PDFEncryptionJCE, org.apache.fop.pdf.PDFEncryptionJCE$EncryptionSettings);
    descriptor: (Lorg/apache/fop/pdf/PDFEncryptionJCE;Lorg/apache/fop/pdf/PDFEncryptionJCE$EncryptionSettings;)V
    flags: (0x0000) 
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine this
        start local 2 // org.apache.fop.pdf.PDFEncryptionJCE$EncryptionSettings encryptionSettings
         0: .line 237
            aload 0 /* this */
            aload 1
            putfield org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.this$0:Lorg/apache/fop/pdf/PDFEncryptionJCE;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 238
            aload 0 /* this */
            aload 2 /* encryptionSettings */
            getfield org.apache.fop.pdf.PDFEncryptionJCE$EncryptionSettings.encryptionLength:I
            bipush 8
            idiv
            putfield org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.encryptionLengthInBytes:I
         2: .line 239
            aload 0 /* this */
            aload 2 /* encryptionSettings */
            getfield org.apache.fop.pdf.PDFEncryptionJCE$EncryptionSettings.permissions:I
            putfield org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.permissions:I
         3: .line 240
            aload 0 /* this */
            aload 2 /* encryptionSettings */
            getfield org.apache.fop.pdf.PDFEncryptionJCE$EncryptionSettings.userPassword:Ljava/lang/String;
            putfield org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.userPassword:Ljava/lang/String;
         4: .line 241
            aload 0 /* this */
            aload 2 /* encryptionSettings */
            getfield org.apache.fop.pdf.PDFEncryptionJCE$EncryptionSettings.ownerPassword:Ljava/lang/String;
            putfield org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.ownerPassword:Ljava/lang/String;
         5: .line 242
            return
        end local 2 // org.apache.fop.pdf.PDFEncryptionJCE$EncryptionSettings encryptionSettings
        end local 0 // org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine this
      LocalVariableTable:
        Start  End  Slot                Name  Signature
            0    6     0                this  Lorg/apache/fop/pdf/PDFEncryptionJCE$InitializationEngine;
            0    6     2  encryptionSettings  Lorg/apache/fop/pdf/PDFEncryptionJCE$EncryptionSettings;
    MethodParameters:
                    Name  Flags
      this$0              final
      encryptionSettings  

  void run();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine this
         0: .line 245
            aload 0 /* this */
            aload 0 /* this */
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.userPassword:Ljava/lang/String;
            invokevirtual org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.preparePassword:(Ljava/lang/String;)[B
            putfield org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.preparedUserPassword:[B
         1: .line 246
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.ownerPassword:Ljava/lang/String;
            ifnull 2
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.ownerPassword:Ljava/lang/String;
            invokevirtual java.lang.String.length:()I
            ifne 4
         2: .line 247
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.preparedUserPassword:[B
            putfield org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.preparedOwnerPassword:[B
         3: .line 248
            goto 5
         4: .line 249
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 0 /* this */
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.ownerPassword:Ljava/lang/String;
            invokevirtual org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.preparePassword:(Ljava/lang/String;)[B
            putfield org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.preparedOwnerPassword:[B
         5: .line 251
      StackMap locals:
      StackMap stack:
            return
        end local 0 // org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    6     0  this  Lorg/apache/fop/pdf/PDFEncryptionJCE$InitializationEngine;

  protected java.lang.String getEncryptionDictionaryPart();
    descriptor: ()Ljava/lang/String;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=2, args_size=1
        start local 0 // org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine this
         0: .line 254
            new java.lang.StringBuilder
            dup
            ldc "/O "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.oValue:[B
            invokestatic org.apache.fop.pdf.PDFText.toHex:([B)Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc "\n"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
         1: .line 255
            ldc "/U "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine.uValue:[B
            invokestatic org.apache.fop.pdf.PDFText.toHex:([B)Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc "\n"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
         2: .line 254
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            astore 1 /* encryptionDictionaryPart */
        start local 1 // java.lang.String encryptionDictionaryPart
         3: .line 256
            aload 1 /* encryptionDictionaryPart */
            areturn
        end local 1 // java.lang.String encryptionDictionaryPart
        end local 0 // org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine this
      LocalVariableTable:
        Start  End  Slot                      Name  Signature
            0    4     0                      this  Lorg/apache/fop/pdf/PDFEncryptionJCE$InitializationEngine;
            3    4     1  encryptionDictionaryPart  Ljava/lang/String;

  protected abstract void computeOValue();
    descriptor: ()V
    flags: (0x0404) ACC_PROTECTED, ACC_ABSTRACT

  protected abstract void computeUValue();
    descriptor: ()V
    flags: (0x0404) ACC_PROTECTED, ACC_ABSTRACT

  protected abstract void createEncryptionKey();
    descriptor: ()V
    flags: (0x0404) ACC_PROTECTED, ACC_ABSTRACT

  protected abstract byte[] preparePassword(java.lang.String);
    descriptor: (Ljava/lang/String;)[B
    flags: (0x0404) ACC_PROTECTED, ACC_ABSTRACT
    MethodParameters:
          Name  Flags
      password  
}
SourceFile: "PDFEncryptionJCE.java"
NestHost: org.apache.fop.pdf.PDFEncryptionJCE
InnerClasses:
  private final EncryptionSettings = org.apache.fop.pdf.PDFEncryptionJCE$EncryptionSettings of org.apache.fop.pdf.PDFEncryptionJCE
  private abstract InitializationEngine = org.apache.fop.pdf.PDFEncryptionJCE$InitializationEngine of org.apache.fop.pdf.PDFEncryptionJCE