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.KeyPurposeId extends org.bouncycastle.asn1.DERObjectIdentifier
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.asn1.x509.KeyPurposeId
  super_class: org.bouncycastle.asn1.DERObjectIdentifier
{
  private static final java.lang.String id_kp;
    descriptor: Ljava/lang/String;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: "1.3.6.1.5.5.7.3"

  public static final org.bouncycastle.asn1.x509.KeyPurposeId anyExtendedKeyUsage;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_serverAuth;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_clientAuth;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_codeSigning;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_emailProtection;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_ipsecEndSystem;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_ipsecTunnel;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_ipsecUser;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_timeStamping;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_OCSPSigning;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_dvcs;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_sbgpCertAAServerAuth;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_scvp_responder;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_eapOverPPP;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_eapOverLAN;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_scvpServer;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_scvpClient;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_ipsecIKE;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_capwapAC;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_capwapWTP;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.x509.KeyPurposeId id_kp_smartcardlogon;
    descriptor: Lorg/bouncycastle/asn1/x509/KeyPurposeId;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=5, locals=0, args_size=0
         0: .line 34
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            new java.lang.StringBuilder
            dup
            getstatic org.bouncycastle.asn1.x509.X509Extensions.ExtendedKeyUsage:Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            invokevirtual org.bouncycastle.asn1.ASN1ObjectIdentifier.getId:()Ljava/lang/String;
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            ldc ".0"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.anyExtendedKeyUsage:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
         1: .line 38
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.1"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_serverAuth:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
         2: .line 42
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.2"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_clientAuth:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
         3: .line 46
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.3"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_codeSigning:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
         4: .line 50
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.4"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_emailProtection:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
         5: .line 54
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.5"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_ipsecEndSystem:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
         6: .line 58
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.6"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_ipsecTunnel:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
         7: .line 62
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.7"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_ipsecUser:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
         8: .line 66
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.8"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_timeStamping:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
         9: .line 70
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.9"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_OCSPSigning:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
        10: .line 74
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.10"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_dvcs:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
        11: .line 78
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.11"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_sbgpCertAAServerAuth:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
        12: .line 82
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.12"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_scvp_responder:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
        13: .line 86
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.13"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_eapOverPPP:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
        14: .line 90
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.14"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_eapOverLAN:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
        15: .line 94
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.15"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_scvpServer:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
        16: .line 98
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.16"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_scvpClient:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
        17: .line 102
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.17"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_ipsecIKE:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
        18: .line 106
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.18"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_capwapAC:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
        19: .line 110
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.5.5.7.3.19"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_capwapWTP:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
        20: .line 118
            new org.bouncycastle.asn1.x509.KeyPurposeId
            dup
            ldc "1.3.6.1.4.1.311.20.2.2"
            invokespecial org.bouncycastle.asn1.x509.KeyPurposeId.<init>:(Ljava/lang/String;)V
            putstatic org.bouncycastle.asn1.x509.KeyPurposeId.id_kp_smartcardlogon:Lorg/bouncycastle/asn1/x509/KeyPurposeId;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>(java.lang.String);
    descriptor: (Ljava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.x509.KeyPurposeId this
        start local 1 // java.lang.String id
         0: .line 28
            aload 0 /* this */
            aload 1 /* id */
            invokespecial org.bouncycastle.asn1.DERObjectIdentifier.<init>:(Ljava/lang/String;)V
         1: .line 29
            return
        end local 1 // java.lang.String id
        end local 0 // org.bouncycastle.asn1.x509.KeyPurposeId this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/bouncycastle/asn1/x509/KeyPurposeId;
            0    2     1    id  Ljava/lang/String;
    MethodParameters:
      Name  Flags
      id    
}
SourceFile: "KeyPurposeId.java"