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) 
public final class org.apache.fop.pdf.PDFEncryptionManager
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: org.apache.fop.pdf.PDFEncryptionManager
  super_class: java.lang.Object
{
  private static final org.apache.commons.logging.Log LOG;
    descriptor: Lorg/apache/commons/logging/Log;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 40
            ldc Lorg/apache/fop/pdf/PDFEncryptionManager;
            invokestatic org.apache.commons.logging.LogFactory.getLog:(Ljava/lang/Class;)Lorg/apache/commons/logging/Log;
            putstatic org.apache.fop.pdf.PDFEncryptionManager.LOG:Lorg/apache/commons/logging/Log;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.fop.pdf.PDFEncryptionManager this
         0: .line 36
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 37
            return
        end local 0 // org.apache.fop.pdf.PDFEncryptionManager this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/fop/pdf/PDFEncryptionManager;

  public static boolean isJCEAvailable();
    descriptor: ()Z
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 48
            ldc "javax.crypto.Cipher"
            invokestatic java.lang.Class.forName:(Ljava/lang/String;)Ljava/lang/Class;
            pop
         1: .line 49
            iconst_1
            ireturn
         2: .line 50
      StackMap locals:
      StackMap stack: java.lang.ClassNotFoundException
            pop
         3: .line 51
            iconst_0
            ireturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
      Exception table:
        from    to  target  type
           0     1       2  Class java.lang.ClassNotFoundException

  public static boolean checkAvailableAlgorithms();
    descriptor: ()Z
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=0
         0: .line 60
            invokestatic org.apache.fop.pdf.PDFEncryptionManager.isJCEAvailable:()Z
            ifne 2
         1: .line 61
            iconst_0
            ireturn
         2: .line 64
      StackMap locals:
      StackMap stack:
            ldc "Cipher.RC4"
            invokestatic java.security.Security.getProviders:(Ljava/lang/String;)[Ljava/security/Provider;
            astore 0 /* providers */
        start local 0 // java.security.Provider[] providers
         3: .line 65
            aload 0 /* providers */
            ifnonnull 6
         4: .line 66
            getstatic org.apache.fop.pdf.PDFEncryptionManager.LOG:Lorg/apache/commons/logging/Log;
            ldc "Cipher provider for RC4 not available."
            invokeinterface org.apache.commons.logging.Log.warn:(Ljava/lang/Object;)V
         5: .line 67
            iconst_0
            ireturn
         6: .line 69
      StackMap locals: java.security.Provider[]
      StackMap stack:
            ldc "MessageDigest.MD5"
            invokestatic java.security.Security.getProviders:(Ljava/lang/String;)[Ljava/security/Provider;
            astore 0 /* providers */
         7: .line 70
            aload 0 /* providers */
            ifnonnull 10
         8: .line 71
            getstatic org.apache.fop.pdf.PDFEncryptionManager.LOG:Lorg/apache/commons/logging/Log;
            ldc "MessageDigest provider for MD5 not available."
            invokeinterface org.apache.commons.logging.Log.warn:(Ljava/lang/Object;)V
         9: .line 72
            iconst_0
            ireturn
        10: .line 74
      StackMap locals:
      StackMap stack:
            iconst_1
            ireturn
        end local 0 // java.security.Provider[] providers
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            3   11     0  providers  [Ljava/security/Provider;

  public static void setupPDFEncryption(org.apache.fop.pdf.PDFEncryptionParams, org.apache.fop.pdf.PDFDocument);
    descriptor: (Lorg/apache/fop/pdf/PDFEncryptionParams;Lorg/apache/fop/pdf/PDFDocument;)V
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.apache.fop.pdf.PDFEncryptionParams params
        start local 1 // org.apache.fop.pdf.PDFDocument pdf
         0: .line 88
            aload 1 /* pdf */
            ifnonnull 2
         1: .line 89
            new java.lang.NullPointerException
            dup
            ldc "PDF document must not be null"
            invokespecial java.lang.NullPointerException.<init>:(Ljava/lang/String;)V
            athrow
         2: .line 91
      StackMap locals:
      StackMap stack:
            aload 0 /* params */
            ifnull 9
         3: .line 92
            invokestatic org.apache.fop.pdf.PDFEncryptionManager.checkAvailableAlgorithms:()Z
            ifne 8
         4: .line 93
            invokestatic org.apache.fop.pdf.PDFEncryptionManager.isJCEAvailable:()Z
            ifeq 7
         5: .line 94
            getstatic org.apache.fop.pdf.PDFEncryptionManager.LOG:Lorg/apache/commons/logging/Log;
            ldc "PDF encryption has been requested, JCE is available but there's no JCE provider available that provides the necessary algorithms. The PDF won't be encrypted."
            invokeinterface org.apache.commons.logging.Log.warn:(Ljava/lang/Object;)V
         6: .line 99
            goto 8
         7: .line 100
      StackMap locals:
      StackMap stack:
            getstatic org.apache.fop.pdf.PDFEncryptionManager.LOG:Lorg/apache/commons/logging/Log;
            ldc "PDF encryption has been requested but JCE is unavailable! The PDF won't be encrypted."
            invokeinterface org.apache.commons.logging.Log.warn:(Ljava/lang/Object;)V
         8: .line 104
      StackMap locals:
      StackMap stack:
            aload 1 /* pdf */
            aload 0 /* params */
            invokevirtual org.apache.fop.pdf.PDFDocument.setEncryption:(Lorg/apache/fop/pdf/PDFEncryptionParams;)V
         9: .line 106
      StackMap locals:
      StackMap stack:
            return
        end local 1 // org.apache.fop.pdf.PDFDocument pdf
        end local 0 // org.apache.fop.pdf.PDFEncryptionParams params
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0   10     0  params  Lorg/apache/fop/pdf/PDFEncryptionParams;
            0   10     1     pdf  Lorg/apache/fop/pdf/PDFDocument;
    MethodParameters:
        Name  Flags
      params  
      pdf     

  public static org.apache.fop.pdf.PDFEncryption newInstance(org.apache.fop.pdf.PDFEncryptionParams, org.apache.fop.pdf.PDFDocument);
    descriptor: (Lorg/apache/fop/pdf/PDFEncryptionParams;Lorg/apache/fop/pdf/PDFDocument;)Lorg/apache/fop/pdf/PDFEncryption;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=6, locals=6, args_size=2
        start local 0 // org.apache.fop.pdf.PDFEncryptionParams params
        start local 1 // org.apache.fop.pdf.PDFDocument pdf
         0: .line 118
            new org.apache.fop.pdf.PDFObjectNumber
            dup
            invokespecial org.apache.fop.pdf.PDFObjectNumber.<init>:()V
            astore 2 /* pdfObjectNumber */
        start local 2 // org.apache.fop.pdf.PDFObjectNumber pdfObjectNumber
         1: .line 119
            aload 2 /* pdfObjectNumber */
            aload 1 /* pdf */
            invokevirtual org.apache.fop.pdf.PDFObjectNumber.setDocument:(Lorg/apache/fop/pdf/PDFDocument;)V
         2: .line 120
            ldc "org.apache.fop.pdf.PDFEncryptionJCE"
            invokestatic java.lang.Class.forName:(Ljava/lang/String;)Ljava/lang/Class;
            astore 3 /* clazz */
        start local 3 // java.lang.Class clazz
         3: .line 121
            aload 3 /* clazz */
            ldc "make"
         4: .line 122
            iconst_3
            anewarray java.lang.Class
            dup
            iconst_0
            ldc Lorg/apache/fop/pdf/PDFObjectNumber;
            aastore
            dup
            iconst_1
            ldc Lorg/apache/fop/pdf/PDFEncryptionParams;
            aastore
            dup
            iconst_2
            ldc Lorg/apache/fop/pdf/PDFDocument;
            aastore
         5: .line 121
            invokevirtual java.lang.Class.getMethod:(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;
            astore 4 /* makeMethod */
        start local 4 // java.lang.reflect.Method makeMethod
         6: .line 123
            aload 4 /* makeMethod */
            aconst_null
         7: .line 124
            iconst_3
            anewarray java.lang.Object
            dup
            iconst_0
            aload 2 /* pdfObjectNumber */
            aastore
            dup
            iconst_1
            aload 0 /* params */
            aastore
            dup
            iconst_2
            aload 1 /* pdf */
            aastore
         8: .line 123
            invokevirtual java.lang.reflect.Method.invoke:(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;
            astore 5 /* obj */
        start local 5 // java.lang.Object obj
         9: .line 125
            aload 5 /* obj */
            checkcast org.apache.fop.pdf.PDFEncryption
        10: areturn
        end local 5 // java.lang.Object obj
        end local 4 // java.lang.reflect.Method makeMethod
        end local 3 // java.lang.Class clazz
        end local 2 // org.apache.fop.pdf.PDFObjectNumber pdfObjectNumber
        11: .line 126
      StackMap locals:
      StackMap stack: java.lang.ClassNotFoundException
            pop
        12: .line 127
            invokestatic org.apache.fop.pdf.PDFEncryptionManager.checkAvailableAlgorithms:()Z
            ifeq 14
        13: .line 128
            getstatic org.apache.fop.pdf.PDFEncryptionManager.LOG:Lorg/apache/commons/logging/Log;
            ldc "JCE and algorithms available, but the implementation class unavailable. Please do a full rebuild."
            invokeinterface org.apache.commons.logging.Log.warn:(Ljava/lang/Object;)V
        14: .line 132
      StackMap locals:
      StackMap stack:
            aconst_null
            areturn
        15: .line 133
      StackMap locals:
      StackMap stack: java.lang.NoSuchMethodException
            astore 2 /* e */
        start local 2 // java.lang.NoSuchMethodException e
        16: .line 134
            getstatic org.apache.fop.pdf.PDFEncryptionManager.LOG:Lorg/apache/commons/logging/Log;
            aload 2 /* e */
            invokeinterface org.apache.commons.logging.Log.error:(Ljava/lang/Object;)V
        17: .line 135
            aconst_null
            areturn
        end local 2 // java.lang.NoSuchMethodException e
        18: .line 136
      StackMap locals:
      StackMap stack: java.lang.IllegalAccessException
            astore 2 /* e */
        start local 2 // java.lang.IllegalAccessException e
        19: .line 137
            getstatic org.apache.fop.pdf.PDFEncryptionManager.LOG:Lorg/apache/commons/logging/Log;
            aload 2 /* e */
            invokeinterface org.apache.commons.logging.Log.error:(Ljava/lang/Object;)V
        20: .line 138
            aconst_null
            areturn
        end local 2 // java.lang.IllegalAccessException e
        21: .line 139
      StackMap locals:
      StackMap stack: java.lang.reflect.InvocationTargetException
            astore 2 /* e */
        start local 2 // java.lang.reflect.InvocationTargetException e
        22: .line 140
            getstatic org.apache.fop.pdf.PDFEncryptionManager.LOG:Lorg/apache/commons/logging/Log;
            aload 2 /* e */
            invokeinterface org.apache.commons.logging.Log.error:(Ljava/lang/Object;)V
        23: .line 141
            aconst_null
            areturn
        end local 2 // java.lang.reflect.InvocationTargetException e
        end local 1 // org.apache.fop.pdf.PDFDocument pdf
        end local 0 // org.apache.fop.pdf.PDFEncryptionParams params
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0   24     0           params  Lorg/apache/fop/pdf/PDFEncryptionParams;
            0   24     1              pdf  Lorg/apache/fop/pdf/PDFDocument;
            1   11     2  pdfObjectNumber  Lorg/apache/fop/pdf/PDFObjectNumber;
            3   11     3            clazz  Ljava/lang/Class<*>;
            6   11     4       makeMethod  Ljava/lang/reflect/Method;
            9   11     5              obj  Ljava/lang/Object;
           16   18     2                e  Ljava/lang/NoSuchMethodException;
           19   21     2                e  Ljava/lang/IllegalAccessException;
           22   24     2                e  Ljava/lang/reflect/InvocationTargetException;
      Exception table:
        from    to  target  type
           0    10      11  Class java.lang.ClassNotFoundException
           0    10      15  Class java.lang.NoSuchMethodException
           0    10      18  Class java.lang.IllegalAccessException
           0    10      21  Class java.lang.reflect.InvocationTargetException
    MethodParameters:
        Name  Flags
      params  
      pdf     
}
SourceFile: "PDFEncryptionManager.java"