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.SubjectKeyIdentifier extends org.bouncycastle.asn1.ASN1Encodable
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.asn1.x509.SubjectKeyIdentifier
  super_class: org.bouncycastle.asn1.ASN1Encodable
{
  private byte[] keyidentifier;
    descriptor: [B
    flags: (0x0002) ACC_PRIVATE

  public static org.bouncycastle.asn1.x509.SubjectKeyIdentifier getInstance(org.bouncycastle.asn1.ASN1TaggedObject, boolean);
    descriptor: (Lorg/bouncycastle/asn1/ASN1TaggedObject;Z)Lorg/bouncycastle/asn1/x509/SubjectKeyIdentifier;
    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 26
            aload 0 /* obj */
            iload 1 /* explicit */
            invokestatic org.bouncycastle.asn1.ASN1OctetString.getInstance:(Lorg/bouncycastle/asn1/ASN1TaggedObject;Z)Lorg/bouncycastle/asn1/ASN1OctetString;
            invokestatic org.bouncycastle.asn1.x509.SubjectKeyIdentifier.getInstance:(Ljava/lang/Object;)Lorg/bouncycastle/asn1/x509/SubjectKeyIdentifier;
            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.SubjectKeyIdentifier getInstance(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Lorg/bouncycastle/asn1/x509/SubjectKeyIdentifier;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // java.lang.Object obj
         0: .line 32
            aload 0 /* obj */
            instanceof org.bouncycastle.asn1.x509.SubjectKeyIdentifier
            ifeq 2
         1: .line 34
            aload 0 /* obj */
            checkcast org.bouncycastle.asn1.x509.SubjectKeyIdentifier
            areturn
         2: .line 37
      StackMap locals:
      StackMap stack:
            aload 0 /* obj */
            instanceof org.bouncycastle.asn1.x509.SubjectPublicKeyInfo
            ifeq 4
         3: .line 39
            new org.bouncycastle.asn1.x509.SubjectKeyIdentifier
            dup
            aload 0 /* obj */
            checkcast org.bouncycastle.asn1.x509.SubjectPublicKeyInfo
            invokespecial org.bouncycastle.asn1.x509.SubjectKeyIdentifier.<init>:(Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)V
            areturn
         4: .line 42
      StackMap locals:
      StackMap stack:
            aload 0 /* obj */
            instanceof org.bouncycastle.asn1.ASN1OctetString
            ifeq 6
         5: .line 44
            new org.bouncycastle.asn1.x509.SubjectKeyIdentifier
            dup
            aload 0 /* obj */
            checkcast org.bouncycastle.asn1.ASN1OctetString
            invokespecial org.bouncycastle.asn1.x509.SubjectKeyIdentifier.<init>:(Lorg/bouncycastle/asn1/ASN1OctetString;)V
            areturn
         6: .line 47
      StackMap locals:
      StackMap stack:
            aload 0 /* obj */
            instanceof org.bouncycastle.asn1.x509.X509Extension
            ifeq 8
         7: .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.SubjectKeyIdentifier.getInstance:(Ljava/lang/Object;)Lorg/bouncycastle/asn1/x509/SubjectKeyIdentifier;
            areturn
         8: .line 52
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Invalid SubjectKeyIdentifier: "
            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    9     0   obj  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      obj   

  public void <init>(byte[]);
    descriptor: ([B)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.x509.SubjectKeyIdentifier this
        start local 1 // byte[] keyid
         0: .line 55
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 58
            aload 0 /* this */
            aload 1 /* keyid */
            putfield org.bouncycastle.asn1.x509.SubjectKeyIdentifier.keyidentifier:[B
         2: .line 59
            return
        end local 1 // byte[] keyid
        end local 0 // org.bouncycastle.asn1.x509.SubjectKeyIdentifier this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lorg/bouncycastle/asn1/x509/SubjectKeyIdentifier;
            0    3     1  keyid  [B
    MethodParameters:
       Name  Flags
      keyid  

  public void <init>(org.bouncycastle.asn1.ASN1OctetString);
    descriptor: (Lorg/bouncycastle/asn1/ASN1OctetString;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.x509.SubjectKeyIdentifier this
        start local 1 // org.bouncycastle.asn1.ASN1OctetString keyid
         0: .line 61
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 64
            aload 0 /* this */
            aload 1 /* keyid */
            invokevirtual org.bouncycastle.asn1.ASN1OctetString.getOctets:()[B
            putfield org.bouncycastle.asn1.x509.SubjectKeyIdentifier.keyidentifier:[B
         2: .line 65
            return
        end local 1 // org.bouncycastle.asn1.ASN1OctetString keyid
        end local 0 // org.bouncycastle.asn1.x509.SubjectKeyIdentifier this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lorg/bouncycastle/asn1/x509/SubjectKeyIdentifier;
            0    3     1  keyid  Lorg/bouncycastle/asn1/ASN1OctetString;
    MethodParameters:
       Name  Flags
      keyid  

  public void <init>(org.bouncycastle.asn1.x509.SubjectPublicKeyInfo);
    descriptor: (Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.x509.SubjectKeyIdentifier this
        start local 1 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo spki
         0: .line 73
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 76
            aload 0 /* this */
            aload 1 /* spki */
            invokestatic org.bouncycastle.asn1.x509.SubjectKeyIdentifier.getDigest:(Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)[B
            putfield org.bouncycastle.asn1.x509.SubjectKeyIdentifier.keyidentifier:[B
         2: .line 77
            return
        end local 1 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo spki
        end local 0 // org.bouncycastle.asn1.x509.SubjectKeyIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/bouncycastle/asn1/x509/SubjectKeyIdentifier;
            0    3     1  spki  Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;
    MethodParameters:
      Name  Flags
      spki  

  public byte[] getKeyIdentifier();
    descriptor: ()[B
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.x509.SubjectKeyIdentifier this
         0: .line 81
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x509.SubjectKeyIdentifier.keyidentifier:[B
            areturn
        end local 0 // org.bouncycastle.asn1.x509.SubjectKeyIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/asn1/x509/SubjectKeyIdentifier;

  public org.bouncycastle.asn1.DERObject toASN1Object();
    descriptor: ()Lorg/bouncycastle/asn1/DERObject;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.x509.SubjectKeyIdentifier this
         0: .line 86
            new org.bouncycastle.asn1.DEROctetString
            dup
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x509.SubjectKeyIdentifier.keyidentifier:[B
            invokespecial org.bouncycastle.asn1.DEROctetString.<init>:([B)V
            areturn
        end local 0 // org.bouncycastle.asn1.x509.SubjectKeyIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/asn1/x509/SubjectKeyIdentifier;

  public static org.bouncycastle.asn1.x509.SubjectKeyIdentifier createSHA1KeyIdentifier(org.bouncycastle.asn1.x509.SubjectPublicKeyInfo);
    descriptor: (Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)Lorg/bouncycastle/asn1/x509/SubjectKeyIdentifier;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo keyInfo
         0: .line 101
            new org.bouncycastle.asn1.x509.SubjectKeyIdentifier
            dup
            aload 0 /* keyInfo */
            invokespecial org.bouncycastle.asn1.x509.SubjectKeyIdentifier.<init>:(Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)V
            areturn
        end local 0 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo keyInfo
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0  keyInfo  Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;
    MethodParameters:
         Name  Flags
      keyInfo  

  public static org.bouncycastle.asn1.x509.SubjectKeyIdentifier createTruncatedSHA1KeyIdentifier(org.bouncycastle.asn1.x509.SubjectPublicKeyInfo);
    descriptor: (Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)Lorg/bouncycastle/asn1/x509/SubjectKeyIdentifier;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=3, args_size=1
        start local 0 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo keyInfo
         0: .line 116
            aload 0 /* keyInfo */
            invokestatic org.bouncycastle.asn1.x509.SubjectKeyIdentifier.getDigest:(Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)[B
            astore 1 /* dig */
        start local 1 // byte[] dig
         1: .line 117
            bipush 8
            newarray 8
            astore 2 /* id */
        start local 2 // byte[] id
         2: .line 119
            aload 1 /* dig */
            aload 1 /* dig */
            arraylength
            bipush 8
            isub
            aload 2 /* id */
            iconst_0
            aload 2 /* id */
            arraylength
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
         3: .line 121
            aload 2 /* id */
            iconst_0
            dup2
            baload
            bipush 15
            iand
            i2b
            bastore
         4: .line 122
            aload 2 /* id */
            iconst_0
            dup2
            baload
            bipush 64
            ior
            i2b
            bastore
         5: .line 124
            new org.bouncycastle.asn1.x509.SubjectKeyIdentifier
            dup
            aload 2 /* id */
            invokespecial org.bouncycastle.asn1.x509.SubjectKeyIdentifier.<init>:([B)V
            areturn
        end local 2 // byte[] id
        end local 1 // byte[] dig
        end local 0 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo keyInfo
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    6     0  keyInfo  Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;
            1    6     1      dig  [B
            2    6     2       id  [B
    MethodParameters:
         Name  Flags
      keyInfo  

  private static byte[] getDigest(org.bouncycastle.asn1.x509.SubjectPublicKeyInfo);
    descriptor: (Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)[B
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=4, locals=4, args_size=1
        start local 0 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo spki
         0: .line 129
            new org.bouncycastle.crypto.digests.SHA1Digest
            dup
            invokespecial org.bouncycastle.crypto.digests.SHA1Digest.<init>:()V
            astore 1 /* digest */
        start local 1 // org.bouncycastle.crypto.Digest digest
         1: .line 130
            aload 1 /* digest */
            invokeinterface org.bouncycastle.crypto.Digest.getDigestSize:()I
            newarray 8
            astore 2 /* resBuf */
        start local 2 // byte[] resBuf
         2: .line 132
            aload 0 /* spki */
            invokevirtual org.bouncycastle.asn1.x509.SubjectPublicKeyInfo.getPublicKeyData:()Lorg/bouncycastle/asn1/DERBitString;
            invokevirtual org.bouncycastle.asn1.DERBitString.getBytes:()[B
            astore 3 /* bytes */
        start local 3 // byte[] bytes
         3: .line 133
            aload 1 /* digest */
            aload 3 /* bytes */
            iconst_0
            aload 3 /* bytes */
            arraylength
            invokeinterface org.bouncycastle.crypto.Digest.update:([BII)V
         4: .line 134
            aload 1 /* digest */
            aload 2 /* resBuf */
            iconst_0
            invokeinterface org.bouncycastle.crypto.Digest.doFinal:([BI)I
            pop
         5: .line 135
            aload 2 /* resBuf */
            areturn
        end local 3 // byte[] bytes
        end local 2 // byte[] resBuf
        end local 1 // org.bouncycastle.crypto.Digest digest
        end local 0 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo spki
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    6     0    spki  Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;
            1    6     1  digest  Lorg/bouncycastle/crypto/Digest;
            2    6     2  resBuf  [B
            3    6     3   bytes  [B
    MethodParameters:
      Name  Flags
      spki  
}
SourceFile: "SubjectKeyIdentifier.java"