http://www.bouncycastle.org/java.html: The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 to JDK 1.8. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.
  • The Legion of the Bouncy Castle Inc. 
public class org.bouncycastle.cert.X509ExtensionUtils
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.cert.X509ExtensionUtils
  super_class: java.lang.Object
{
  private org.bouncycastle.operator.DigestCalculator calculator;
    descriptor: Lorg/bouncycastle/operator/DigestCalculator;
    flags: (0x0002) ACC_PRIVATE

  public void <init>(org.bouncycastle.operator.DigestCalculator);
    descriptor: (Lorg/bouncycastle/operator/DigestCalculator;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.cert.X509ExtensionUtils this
        start local 1 // org.bouncycastle.operator.DigestCalculator calculator
         0: .line 31
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 33
            aload 0 /* this */
            aload 1 /* calculator */
            putfield org.bouncycastle.cert.X509ExtensionUtils.calculator:Lorg/bouncycastle/operator/DigestCalculator;
         2: .line 34
            return
        end local 1 // org.bouncycastle.operator.DigestCalculator calculator
        end local 0 // org.bouncycastle.cert.X509ExtensionUtils this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    3     0        this  Lorg/bouncycastle/cert/X509ExtensionUtils;
            0    3     1  calculator  Lorg/bouncycastle/operator/DigestCalculator;
    MethodParameters:
            Name  Flags
      calculator  

  public org.bouncycastle.asn1.x509.AuthorityKeyIdentifier createAuthorityKeyIdentifier(org.bouncycastle.cert.X509CertificateHolder);
    descriptor: (Lorg/bouncycastle/cert/X509CertificateHolder;)Lorg/bouncycastle/asn1/x509/AuthorityKeyIdentifier;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=3, args_size=2
        start local 0 // org.bouncycastle.cert.X509ExtensionUtils this
        start local 1 // org.bouncycastle.cert.X509CertificateHolder certHolder
         0: .line 45
            new org.bouncycastle.asn1.x509.GeneralName
            dup
            aload 1 /* certHolder */
            invokevirtual org.bouncycastle.cert.X509CertificateHolder.getIssuer:()Lorg/bouncycastle/asn1/x500/X500Name;
            invokespecial org.bouncycastle.asn1.x509.GeneralName.<init>:(Lorg/bouncycastle/asn1/x500/X500Name;)V
            astore 2 /* genName */
        start local 2 // org.bouncycastle.asn1.x509.GeneralName genName
         1: .line 47
            new org.bouncycastle.asn1.x509.AuthorityKeyIdentifier
            dup
         2: .line 48
            aload 0 /* this */
            aload 1 /* certHolder */
            invokevirtual org.bouncycastle.cert.X509ExtensionUtils.getSubjectKeyIdentifier:(Lorg/bouncycastle/cert/X509CertificateHolder;)[B
            new org.bouncycastle.asn1.x509.GeneralNames
            dup
            aload 2 /* genName */
            invokespecial org.bouncycastle.asn1.x509.GeneralNames.<init>:(Lorg/bouncycastle/asn1/x509/GeneralName;)V
            aload 1 /* certHolder */
            invokevirtual org.bouncycastle.cert.X509CertificateHolder.getSerialNumber:()Ljava/math/BigInteger;
         3: .line 47
            invokespecial org.bouncycastle.asn1.x509.AuthorityKeyIdentifier.<init>:([BLorg/bouncycastle/asn1/x509/GeneralNames;Ljava/math/BigInteger;)V
            areturn
        end local 2 // org.bouncycastle.asn1.x509.GeneralName genName
        end local 1 // org.bouncycastle.cert.X509CertificateHolder certHolder
        end local 0 // org.bouncycastle.cert.X509ExtensionUtils this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    4     0        this  Lorg/bouncycastle/cert/X509ExtensionUtils;
            0    4     1  certHolder  Lorg/bouncycastle/cert/X509CertificateHolder;
            1    4     2     genName  Lorg/bouncycastle/asn1/x509/GeneralName;
    MethodParameters:
            Name  Flags
      certHolder  

  public org.bouncycastle.asn1.x509.AuthorityKeyIdentifier createAuthorityKeyIdentifier(org.bouncycastle.asn1.x509.SubjectPublicKeyInfo);
    descriptor: (Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)Lorg/bouncycastle/asn1/x509/AuthorityKeyIdentifier;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // org.bouncycastle.cert.X509ExtensionUtils this
        start local 1 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo publicKeyInfo
         0: .line 59
            new org.bouncycastle.asn1.x509.AuthorityKeyIdentifier
            dup
            aload 0 /* this */
            aload 1 /* publicKeyInfo */
            invokevirtual org.bouncycastle.cert.X509ExtensionUtils.calculateIdentifier:(Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)[B
            invokespecial org.bouncycastle.asn1.x509.AuthorityKeyIdentifier.<init>:([B)V
            areturn
        end local 1 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo publicKeyInfo
        end local 0 // org.bouncycastle.cert.X509ExtensionUtils this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    1     0           this  Lorg/bouncycastle/cert/X509ExtensionUtils;
            0    1     1  publicKeyInfo  Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;
    MethodParameters:
               Name  Flags
      publicKeyInfo  

  public org.bouncycastle.asn1.x509.AuthorityKeyIdentifier createAuthorityKeyIdentifier(org.bouncycastle.asn1.x509.SubjectPublicKeyInfo, org.bouncycastle.asn1.x509.GeneralNames, java.math.BigInteger);
    descriptor: (Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;Lorg/bouncycastle/asn1/x509/GeneralNames;Ljava/math/BigInteger;)Lorg/bouncycastle/asn1/x509/AuthorityKeyIdentifier;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=4, args_size=4
        start local 0 // org.bouncycastle.cert.X509ExtensionUtils this
        start local 1 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo publicKeyInfo
        start local 2 // org.bouncycastle.asn1.x509.GeneralNames generalNames
        start local 3 // java.math.BigInteger serial
         0: .line 72
            new org.bouncycastle.asn1.x509.AuthorityKeyIdentifier
            dup
            aload 0 /* this */
            aload 1 /* publicKeyInfo */
            invokevirtual org.bouncycastle.cert.X509ExtensionUtils.calculateIdentifier:(Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)[B
            aload 2 /* generalNames */
            aload 3 /* serial */
            invokespecial org.bouncycastle.asn1.x509.AuthorityKeyIdentifier.<init>:([BLorg/bouncycastle/asn1/x509/GeneralNames;Ljava/math/BigInteger;)V
            areturn
        end local 3 // java.math.BigInteger serial
        end local 2 // org.bouncycastle.asn1.x509.GeneralNames generalNames
        end local 1 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo publicKeyInfo
        end local 0 // org.bouncycastle.cert.X509ExtensionUtils this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    1     0           this  Lorg/bouncycastle/cert/X509ExtensionUtils;
            0    1     1  publicKeyInfo  Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;
            0    1     2   generalNames  Lorg/bouncycastle/asn1/x509/GeneralNames;
            0    1     3         serial  Ljava/math/BigInteger;
    MethodParameters:
               Name  Flags
      publicKeyInfo  
      generalNames   
      serial         

  public org.bouncycastle.asn1.x509.SubjectKeyIdentifier createSubjectKeyIdentifier(org.bouncycastle.asn1.x509.SubjectPublicKeyInfo);
    descriptor: (Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)Lorg/bouncycastle/asn1/x509/SubjectKeyIdentifier;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // org.bouncycastle.cert.X509ExtensionUtils this
        start local 1 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo publicKeyInfo
         0: .line 88
            new org.bouncycastle.asn1.x509.SubjectKeyIdentifier
            dup
            aload 0 /* this */
            aload 1 /* publicKeyInfo */
            invokevirtual org.bouncycastle.cert.X509ExtensionUtils.calculateIdentifier:(Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)[B
            invokespecial org.bouncycastle.asn1.x509.SubjectKeyIdentifier.<init>:([B)V
            areturn
        end local 1 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo publicKeyInfo
        end local 0 // org.bouncycastle.cert.X509ExtensionUtils this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    1     0           this  Lorg/bouncycastle/cert/X509ExtensionUtils;
            0    1     1  publicKeyInfo  Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;
    MethodParameters:
               Name  Flags
      publicKeyInfo  

  public org.bouncycastle.asn1.x509.SubjectKeyIdentifier createTruncatedSubjectKeyIdentifier(org.bouncycastle.asn1.x509.SubjectPublicKeyInfo);
    descriptor: (Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)Lorg/bouncycastle/asn1/x509/SubjectKeyIdentifier;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=4, args_size=2
        start local 0 // org.bouncycastle.cert.X509ExtensionUtils this
        start local 1 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo publicKeyInfo
         0: .line 103
            aload 0 /* this */
            aload 1 /* publicKeyInfo */
            invokevirtual org.bouncycastle.cert.X509ExtensionUtils.calculateIdentifier:(Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)[B
            astore 2 /* digest */
        start local 2 // byte[] digest
         1: .line 104
            bipush 8
            newarray 8
            astore 3 /* id */
        start local 3 // byte[] id
         2: .line 106
            aload 2 /* digest */
            aload 2 /* digest */
            arraylength
            bipush 8
            isub
            aload 3 /* id */
            iconst_0
            aload 3 /* id */
            arraylength
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
         3: .line 108
            aload 3 /* id */
            iconst_0
            dup2
            baload
            bipush 15
            iand
            i2b
            bastore
         4: .line 109
            aload 3 /* id */
            iconst_0
            dup2
            baload
            bipush 64
            ior
            i2b
            bastore
         5: .line 111
            new org.bouncycastle.asn1.x509.SubjectKeyIdentifier
            dup
            aload 3 /* id */
            invokespecial org.bouncycastle.asn1.x509.SubjectKeyIdentifier.<init>:([B)V
            areturn
        end local 3 // byte[] id
        end local 2 // byte[] digest
        end local 1 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo publicKeyInfo
        end local 0 // org.bouncycastle.cert.X509ExtensionUtils this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    6     0           this  Lorg/bouncycastle/cert/X509ExtensionUtils;
            0    6     1  publicKeyInfo  Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;
            1    6     2         digest  [B
            2    6     3             id  [B
    MethodParameters:
               Name  Flags
      publicKeyInfo  

  private byte[] getSubjectKeyIdentifier(org.bouncycastle.cert.X509CertificateHolder);
    descriptor: (Lorg/bouncycastle/cert/X509CertificateHolder;)[B
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // org.bouncycastle.cert.X509ExtensionUtils this
        start local 1 // org.bouncycastle.cert.X509CertificateHolder certHolder
         0: .line 116
            aload 1 /* certHolder */
            invokevirtual org.bouncycastle.cert.X509CertificateHolder.getVersionNumber:()I
            iconst_3
            if_icmpeq 2
         1: .line 118
            aload 0 /* this */
            aload 1 /* certHolder */
            invokevirtual org.bouncycastle.cert.X509CertificateHolder.getSubjectPublicKeyInfo:()Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;
            invokevirtual org.bouncycastle.cert.X509ExtensionUtils.calculateIdentifier:(Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)[B
            areturn
         2: .line 122
      StackMap locals:
      StackMap stack:
            aload 1 /* certHolder */
            getstatic org.bouncycastle.asn1.x509.Extension.subjectKeyIdentifier:Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            invokevirtual org.bouncycastle.cert.X509CertificateHolder.getExtension:(Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;)Lorg/bouncycastle/asn1/x509/Extension;
            astore 2 /* ext */
        start local 2 // org.bouncycastle.asn1.x509.Extension ext
         3: .line 124
            aload 2 /* ext */
            ifnull 5
         4: .line 126
            aload 2 /* ext */
            invokevirtual org.bouncycastle.asn1.x509.Extension.getParsedValue:()Lorg/bouncycastle/asn1/ASN1Encodable;
            invokestatic org.bouncycastle.asn1.ASN1OctetString.getInstance:(Ljava/lang/Object;)Lorg/bouncycastle/asn1/ASN1OctetString;
            invokevirtual org.bouncycastle.asn1.ASN1OctetString.getOctets:()[B
            areturn
         5: .line 130
      StackMap locals: org.bouncycastle.asn1.x509.Extension
      StackMap stack:
            aload 0 /* this */
            aload 1 /* certHolder */
            invokevirtual org.bouncycastle.cert.X509CertificateHolder.getSubjectPublicKeyInfo:()Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;
            invokevirtual org.bouncycastle.cert.X509ExtensionUtils.calculateIdentifier:(Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)[B
            areturn
        end local 2 // org.bouncycastle.asn1.x509.Extension ext
        end local 1 // org.bouncycastle.cert.X509CertificateHolder certHolder
        end local 0 // org.bouncycastle.cert.X509ExtensionUtils this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    6     0        this  Lorg/bouncycastle/cert/X509ExtensionUtils;
            0    6     1  certHolder  Lorg/bouncycastle/cert/X509CertificateHolder;
            3    6     2         ext  Lorg/bouncycastle/asn1/x509/Extension;
    MethodParameters:
            Name  Flags
      certHolder  

  private byte[] calculateIdentifier(org.bouncycastle.asn1.x509.SubjectPublicKeyInfo);
    descriptor: (Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;)[B
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=5, locals=5, args_size=2
        start local 0 // org.bouncycastle.cert.X509ExtensionUtils this
        start local 1 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo publicKeyInfo
         0: .line 137
            aload 1 /* publicKeyInfo */
            invokevirtual org.bouncycastle.asn1.x509.SubjectPublicKeyInfo.getPublicKeyData:()Lorg/bouncycastle/asn1/DERBitString;
            invokevirtual org.bouncycastle.asn1.DERBitString.getBytes:()[B
            astore 2 /* bytes */
        start local 2 // byte[] bytes
         1: .line 139
            aload 0 /* this */
            getfield org.bouncycastle.cert.X509ExtensionUtils.calculator:Lorg/bouncycastle/operator/DigestCalculator;
            invokeinterface org.bouncycastle.operator.DigestCalculator.getOutputStream:()Ljava/io/OutputStream;
            astore 3 /* cOut */
        start local 3 // java.io.OutputStream cOut
         2: .line 143
            aload 3 /* cOut */
            aload 2 /* bytes */
            invokevirtual java.io.OutputStream.write:([B)V
         3: .line 145
            aload 3 /* cOut */
            invokevirtual java.io.OutputStream.close:()V
         4: .line 146
            goto 7
         5: .line 147
      StackMap locals: org.bouncycastle.cert.X509ExtensionUtils org.bouncycastle.asn1.x509.SubjectPublicKeyInfo byte[] java.io.OutputStream
      StackMap stack: java.io.IOException
            astore 4 /* e */
        start local 4 // java.io.IOException e
         6: .line 149
            new org.bouncycastle.cert.CertRuntimeException
            dup
            new java.lang.StringBuilder
            dup
            ldc "unable to calculate identifier: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 4 /* e */
            invokevirtual java.io.IOException.getMessage:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            aload 4 /* e */
            invokespecial org.bouncycastle.cert.CertRuntimeException.<init>:(Ljava/lang/String;Ljava/lang/Throwable;)V
            athrow
        end local 4 // java.io.IOException e
         7: .line 152
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.cert.X509ExtensionUtils.calculator:Lorg/bouncycastle/operator/DigestCalculator;
            invokeinterface org.bouncycastle.operator.DigestCalculator.getDigest:()[B
            areturn
        end local 3 // java.io.OutputStream cOut
        end local 2 // byte[] bytes
        end local 1 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo publicKeyInfo
        end local 0 // org.bouncycastle.cert.X509ExtensionUtils this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    8     0           this  Lorg/bouncycastle/cert/X509ExtensionUtils;
            0    8     1  publicKeyInfo  Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;
            1    8     2          bytes  [B
            2    8     3           cOut  Ljava/io/OutputStream;
            6    7     4              e  Ljava/io/IOException;
      Exception table:
        from    to  target  type
           2     4       5  Class java.io.IOException
    MethodParameters:
               Name  Flags
      publicKeyInfo  
}
SourceFile: "X509ExtensionUtils.java"