http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5. 
public class org.bouncycastle.asn1.x509.ExtendedKeyUsage extends org.bouncycastle.asn1.ASN1Encodable
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.asn1.x509.ExtendedKeyUsage
  super_class: org.bouncycastle.asn1.ASN1Encodable
{
  java.util.Hashtable usageTable;
    descriptor: Ljava/util/Hashtable;
    flags: (0x0000) 

  org.bouncycastle.asn1.ASN1Sequence seq;
    descriptor: Lorg/bouncycastle/asn1/ASN1Sequence;
    flags: (0x0000) 

  public static org.bouncycastle.asn1.x509.ExtendedKeyUsage getInstance(org.bouncycastle.asn1.ASN1TaggedObject, boolean);
    descriptor: (Lorg/bouncycastle/asn1/ASN1TaggedObject;Z)Lorg/bouncycastle/asn1/x509/ExtendedKeyUsage;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.ASN1TaggedObject obj
        start local 1 // boolean explicit
         0: .line 31
            aload 0 /* obj */
            iload 1 /* explicit */
            invokestatic org.bouncycastle.asn1.ASN1Sequence.getInstance:(Lorg/bouncycastle/asn1/ASN1TaggedObject;Z)Lorg/bouncycastle/asn1/ASN1Sequence;
            invokestatic org.bouncycastle.asn1.x509.ExtendedKeyUsage.getInstance:(Ljava/lang/Object;)Lorg/bouncycastle/asn1/x509/ExtendedKeyUsage;
            areturn
        end local 1 // boolean explicit
        end local 0 // org.bouncycastle.asn1.ASN1TaggedObject obj
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0       obj  Lorg/bouncycastle/asn1/ASN1TaggedObject;
            0    1     1  explicit  Z
    MethodParameters:
          Name  Flags
      obj       
      explicit  

  public static org.bouncycastle.asn1.x509.ExtendedKeyUsage getInstance(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Lorg/bouncycastle/asn1/x509/ExtendedKeyUsage;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // java.lang.Object obj
         0: .line 37
            aload 0 /* obj */
            instanceof org.bouncycastle.asn1.x509.ExtendedKeyUsage
            ifeq 2
         1: .line 39
            aload 0 /* obj */
            checkcast org.bouncycastle.asn1.x509.ExtendedKeyUsage
            areturn
         2: .line 42
      StackMap locals:
      StackMap stack:
            aload 0 /* obj */
            instanceof org.bouncycastle.asn1.ASN1Sequence
            ifeq 4
         3: .line 44
            new org.bouncycastle.asn1.x509.ExtendedKeyUsage
            dup
            aload 0 /* obj */
            checkcast org.bouncycastle.asn1.ASN1Sequence
            invokespecial org.bouncycastle.asn1.x509.ExtendedKeyUsage.<init>:(Lorg/bouncycastle/asn1/ASN1Sequence;)V
            areturn
         4: .line 47
      StackMap locals:
      StackMap stack:
            aload 0 /* obj */
            instanceof org.bouncycastle.asn1.x509.X509Extension
            ifeq 6
         5: .line 49
            aload 0 /* obj */
            checkcast org.bouncycastle.asn1.x509.X509Extension
            invokestatic org.bouncycastle.asn1.x509.X509Extension.convertValueToObject:(Lorg/bouncycastle/asn1/x509/X509Extension;)Lorg/bouncycastle/asn1/ASN1Object;
            invokestatic org.bouncycastle.asn1.x509.ExtendedKeyUsage.getInstance:(Ljava/lang/Object;)Lorg/bouncycastle/asn1/x509/ExtendedKeyUsage;
            areturn
         6: .line 52
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Invalid ExtendedKeyUsage: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* obj */
            invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
            invokevirtual java.lang.Class.getName:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // java.lang.Object obj
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0   obj  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      obj   

  public void <init>(org.bouncycastle.asn1.x509.KeyPurposeId);
    descriptor: (Lorg/bouncycastle/asn1/x509/KeyPurposeId;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.x509.ExtendedKeyUsage this
        start local 1 // org.bouncycastle.asn1.x509.KeyPurposeId usage
         0: .line 55
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 24
            aload 0 /* this */
            new java.util.Hashtable
            dup
            invokespecial java.util.Hashtable.<init>:()V
            putfield org.bouncycastle.asn1.x509.ExtendedKeyUsage.usageTable:Ljava/util/Hashtable;
         2: .line 58
            aload 0 /* this */
            new org.bouncycastle.asn1.DERSequence
            dup
            aload 1 /* usage */
            invokespecial org.bouncycastle.asn1.DERSequence.<init>:(Lorg/bouncycastle/asn1/DEREncodable;)V
            putfield org.bouncycastle.asn1.x509.ExtendedKeyUsage.seq:Lorg/bouncycastle/asn1/ASN1Sequence;
         3: .line 60
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x509.ExtendedKeyUsage.usageTable:Ljava/util/Hashtable;
            aload 1 /* usage */
            aload 1 /* usage */
            invokevirtual java.util.Hashtable.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
         4: .line 61
            return
        end local 1 // org.bouncycastle.asn1.x509.KeyPurposeId usage
        end local 0 // org.bouncycastle.asn1.x509.ExtendedKeyUsage this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    5     0   this  Lorg/bouncycastle/asn1/x509/ExtendedKeyUsage;
            0    5     1  usage  Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    MethodParameters:
       Name  Flags
      usage  

  public void <init>(org.bouncycastle.asn1.ASN1Sequence);
    descriptor: (Lorg/bouncycastle/asn1/ASN1Sequence;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=4, args_size=2
        start local 0 // org.bouncycastle.asn1.x509.ExtendedKeyUsage this
        start local 1 // org.bouncycastle.asn1.ASN1Sequence seq
         0: .line 63
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 24
            aload 0 /* this */
            new java.util.Hashtable
            dup
            invokespecial java.util.Hashtable.<init>:()V
            putfield org.bouncycastle.asn1.x509.ExtendedKeyUsage.usageTable:Ljava/util/Hashtable;
         2: .line 66
            aload 0 /* this */
            aload 1 /* seq */
            putfield org.bouncycastle.asn1.x509.ExtendedKeyUsage.seq:Lorg/bouncycastle/asn1/ASN1Sequence;
         3: .line 68
            aload 1 /* seq */
            invokevirtual org.bouncycastle.asn1.ASN1Sequence.getObjects:()Ljava/util/Enumeration;
            astore 2 /* e */
        start local 2 // java.util.Enumeration e
         4: .line 70
            goto 9
         5: .line 72
      StackMap locals: org.bouncycastle.asn1.x509.ExtendedKeyUsage org.bouncycastle.asn1.ASN1Sequence java.util.Enumeration
      StackMap stack:
            aload 2 /* e */
            invokeinterface java.util.Enumeration.nextElement:()Ljava/lang/Object;
            astore 3 /* o */
        start local 3 // java.lang.Object o
         6: .line 73
            aload 3 /* o */
            instanceof org.bouncycastle.asn1.DERObjectIdentifier
            ifne 8
         7: .line 75
            new java.lang.IllegalArgumentException
            dup
            ldc "Only DERObjectIdentifiers allowed in ExtendedKeyUsage."
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         8: .line 77
      StackMap locals: java.lang.Object
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x509.ExtendedKeyUsage.usageTable:Ljava/util/Hashtable;
            aload 3 /* o */
            aload 3 /* o */
            invokevirtual java.util.Hashtable.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
        end local 3 // java.lang.Object o
         9: .line 70
      StackMap locals:
      StackMap stack:
            aload 2 /* e */
            invokeinterface java.util.Enumeration.hasMoreElements:()Z
            ifne 5
        10: .line 79
            return
        end local 2 // java.util.Enumeration e
        end local 1 // org.bouncycastle.asn1.ASN1Sequence seq
        end local 0 // org.bouncycastle.asn1.x509.ExtendedKeyUsage this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   11     0  this  Lorg/bouncycastle/asn1/x509/ExtendedKeyUsage;
            0   11     1   seq  Lorg/bouncycastle/asn1/ASN1Sequence;
            4   11     2     e  Ljava/util/Enumeration;
            6    9     3     o  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      seq   

  public void <init>(java.util.Vector);
    descriptor: (Ljava/util/Vector;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=5, args_size=2
        start local 0 // org.bouncycastle.asn1.x509.ExtendedKeyUsage this
        start local 1 // java.util.Vector usages
         0: .line 81
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 24
            aload 0 /* this */
            new java.util.Hashtable
            dup
            invokespecial java.util.Hashtable.<init>:()V
            putfield org.bouncycastle.asn1.x509.ExtendedKeyUsage.usageTable:Ljava/util/Hashtable;
         2: .line 84
            new org.bouncycastle.asn1.ASN1EncodableVector
            dup
            invokespecial org.bouncycastle.asn1.ASN1EncodableVector.<init>:()V
            astore 2 /* v */
        start local 2 // org.bouncycastle.asn1.ASN1EncodableVector v
         3: .line 85
            aload 1 /* usages */
            invokevirtual java.util.Vector.elements:()Ljava/util/Enumeration;
            astore 3 /* e */
        start local 3 // java.util.Enumeration e
         4: .line 87
            goto 8
         5: .line 89
      StackMap locals: org.bouncycastle.asn1.x509.ExtendedKeyUsage java.util.Vector org.bouncycastle.asn1.ASN1EncodableVector java.util.Enumeration
      StackMap stack:
            aload 3 /* e */
            invokeinterface java.util.Enumeration.nextElement:()Ljava/lang/Object;
            checkcast org.bouncycastle.asn1.DERObject
            astore 4 /* o */
        start local 4 // org.bouncycastle.asn1.DERObject o
         6: .line 91
            aload 2 /* v */
            aload 4 /* o */
            invokevirtual org.bouncycastle.asn1.ASN1EncodableVector.add:(Lorg/bouncycastle/asn1/DEREncodable;)V
         7: .line 92
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x509.ExtendedKeyUsage.usageTable:Ljava/util/Hashtable;
            aload 4 /* o */
            aload 4 /* o */
            invokevirtual java.util.Hashtable.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
        end local 4 // org.bouncycastle.asn1.DERObject o
         8: .line 87
      StackMap locals:
      StackMap stack:
            aload 3 /* e */
            invokeinterface java.util.Enumeration.hasMoreElements:()Z
            ifne 5
         9: .line 95
            aload 0 /* this */
            new org.bouncycastle.asn1.DERSequence
            dup
            aload 2 /* v */
            invokespecial org.bouncycastle.asn1.DERSequence.<init>:(Lorg/bouncycastle/asn1/ASN1EncodableVector;)V
            putfield org.bouncycastle.asn1.x509.ExtendedKeyUsage.seq:Lorg/bouncycastle/asn1/ASN1Sequence;
        10: .line 96
            return
        end local 3 // java.util.Enumeration e
        end local 2 // org.bouncycastle.asn1.ASN1EncodableVector v
        end local 1 // java.util.Vector usages
        end local 0 // org.bouncycastle.asn1.x509.ExtendedKeyUsage this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0   11     0    this  Lorg/bouncycastle/asn1/x509/ExtendedKeyUsage;
            0   11     1  usages  Ljava/util/Vector;
            3   11     2       v  Lorg/bouncycastle/asn1/ASN1EncodableVector;
            4   11     3       e  Ljava/util/Enumeration;
            6    8     4       o  Lorg/bouncycastle/asn1/DERObject;
    MethodParameters:
        Name  Flags
      usages  

  public boolean hasKeyPurposeId(org.bouncycastle.asn1.x509.KeyPurposeId);
    descriptor: (Lorg/bouncycastle/asn1/x509/KeyPurposeId;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.x509.ExtendedKeyUsage this
        start local 1 // org.bouncycastle.asn1.x509.KeyPurposeId keyPurposeId
         0: .line 101
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x509.ExtendedKeyUsage.usageTable:Ljava/util/Hashtable;
            aload 1 /* keyPurposeId */
            invokevirtual java.util.Hashtable.get:(Ljava/lang/Object;)Ljava/lang/Object;
            ifnull 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 1 // org.bouncycastle.asn1.x509.KeyPurposeId keyPurposeId
        end local 0 // org.bouncycastle.asn1.x509.ExtendedKeyUsage this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    2     0          this  Lorg/bouncycastle/asn1/x509/ExtendedKeyUsage;
            0    2     1  keyPurposeId  Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    MethodParameters:
              Name  Flags
      keyPurposeId  

  public java.util.Vector getUsages();
    descriptor: ()Ljava/util/Vector;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=1
        start local 0 // org.bouncycastle.asn1.x509.ExtendedKeyUsage this
         0: .line 111
            new java.util.Vector
            dup
            invokespecial java.util.Vector.<init>:()V
            astore 1 /* temp */
        start local 1 // java.util.Vector temp
         1: .line 112
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x509.ExtendedKeyUsage.usageTable:Ljava/util/Hashtable;
            invokevirtual java.util.Hashtable.elements:()Ljava/util/Enumeration;
            astore 2 /* it */
        start local 2 // java.util.Enumeration it
         2: goto 4
         3: .line 114
      StackMap locals: java.util.Vector java.util.Enumeration
      StackMap stack:
            aload 1 /* temp */
            aload 2 /* it */
            invokeinterface java.util.Enumeration.nextElement:()Ljava/lang/Object;
            invokevirtual java.util.Vector.addElement:(Ljava/lang/Object;)V
         4: .line 112
      StackMap locals:
      StackMap stack:
            aload 2 /* it */
            invokeinterface java.util.Enumeration.hasMoreElements:()Z
            ifne 3
        end local 2 // java.util.Enumeration it
         5: .line 116
            aload 1 /* temp */
            areturn
        end local 1 // java.util.Vector temp
        end local 0 // org.bouncycastle.asn1.x509.ExtendedKeyUsage this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    6     0  this  Lorg/bouncycastle/asn1/x509/ExtendedKeyUsage;
            1    6     1  temp  Ljava/util/Vector;
            2    5     2    it  Ljava/util/Enumeration;

  public int size();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.x509.ExtendedKeyUsage this
         0: .line 121
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x509.ExtendedKeyUsage.usageTable:Ljava/util/Hashtable;
            invokevirtual java.util.Hashtable.size:()I
            ireturn
        end local 0 // org.bouncycastle.asn1.x509.ExtendedKeyUsage this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/asn1/x509/ExtendedKeyUsage;

  public org.bouncycastle.asn1.DERObject toASN1Object();
    descriptor: ()Lorg/bouncycastle/asn1/DERObject;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.x509.ExtendedKeyUsage this
         0: .line 126
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x509.ExtendedKeyUsage.seq:Lorg/bouncycastle/asn1/ASN1Sequence;
            areturn
        end local 0 // org.bouncycastle.asn1.x509.ExtendedKeyUsage this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/asn1/x509/ExtendedKeyUsage;
}
SourceFile: "ExtendedKeyUsage.java"