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.jcajce.JcaX509CertificateConverter
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.cert.jcajce.JcaX509CertificateConverter
  super_class: java.lang.Object
{
  private org.bouncycastle.cert.jcajce.CertHelper helper;
    descriptor: Lorg/bouncycastle/cert/jcajce/CertHelper;
    flags: (0x0002) ACC_PRIVATE

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.bouncycastle.cert.jcajce.JcaX509CertificateConverter this
         0: .line 24
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 19
            aload 0 /* this */
            new org.bouncycastle.cert.jcajce.DefaultCertHelper
            dup
            invokespecial org.bouncycastle.cert.jcajce.DefaultCertHelper.<init>:()V
            putfield org.bouncycastle.cert.jcajce.JcaX509CertificateConverter.helper:Lorg/bouncycastle/cert/jcajce/CertHelper;
         2: .line 26
            aload 0 /* this */
            new org.bouncycastle.cert.jcajce.DefaultCertHelper
            dup
            invokespecial org.bouncycastle.cert.jcajce.DefaultCertHelper.<init>:()V
            putfield org.bouncycastle.cert.jcajce.JcaX509CertificateConverter.helper:Lorg/bouncycastle/cert/jcajce/CertHelper;
         3: .line 27
            return
        end local 0 // org.bouncycastle.cert.jcajce.JcaX509CertificateConverter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lorg/bouncycastle/cert/jcajce/JcaX509CertificateConverter;

  public org.bouncycastle.cert.jcajce.JcaX509CertificateConverter setProvider(java.security.Provider);
    descriptor: (Ljava/security/Provider;)Lorg/bouncycastle/cert/jcajce/JcaX509CertificateConverter;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // org.bouncycastle.cert.jcajce.JcaX509CertificateConverter this
        start local 1 // java.security.Provider provider
         0: .line 37
            aload 0 /* this */
            new org.bouncycastle.cert.jcajce.ProviderCertHelper
            dup
            aload 1 /* provider */
            invokespecial org.bouncycastle.cert.jcajce.ProviderCertHelper.<init>:(Ljava/security/Provider;)V
            putfield org.bouncycastle.cert.jcajce.JcaX509CertificateConverter.helper:Lorg/bouncycastle/cert/jcajce/CertHelper;
         1: .line 39
            aload 0 /* this */
            areturn
        end local 1 // java.security.Provider provider
        end local 0 // org.bouncycastle.cert.jcajce.JcaX509CertificateConverter this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    2     0      this  Lorg/bouncycastle/cert/jcajce/JcaX509CertificateConverter;
            0    2     1  provider  Ljava/security/Provider;
    MethodParameters:
          Name  Flags
      provider  

  public org.bouncycastle.cert.jcajce.JcaX509CertificateConverter setProvider(java.lang.String);
    descriptor: (Ljava/lang/String;)Lorg/bouncycastle/cert/jcajce/JcaX509CertificateConverter;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // org.bouncycastle.cert.jcajce.JcaX509CertificateConverter this
        start local 1 // java.lang.String providerName
         0: .line 50
            aload 0 /* this */
            new org.bouncycastle.cert.jcajce.NamedCertHelper
            dup
            aload 1 /* providerName */
            invokespecial org.bouncycastle.cert.jcajce.NamedCertHelper.<init>:(Ljava/lang/String;)V
            putfield org.bouncycastle.cert.jcajce.JcaX509CertificateConverter.helper:Lorg/bouncycastle/cert/jcajce/CertHelper;
         1: .line 52
            aload 0 /* this */
            areturn
        end local 1 // java.lang.String providerName
        end local 0 // org.bouncycastle.cert.jcajce.JcaX509CertificateConverter this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    2     0          this  Lorg/bouncycastle/cert/jcajce/JcaX509CertificateConverter;
            0    2     1  providerName  Ljava/lang/String;
    MethodParameters:
              Name  Flags
      providerName  

  public java.security.cert.X509Certificate getCertificate(org.bouncycastle.cert.X509CertificateHolder);
    descriptor: (Lorg/bouncycastle/cert/X509CertificateHolder;)Ljava/security/cert/X509Certificate;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=3, args_size=2
        start local 0 // org.bouncycastle.cert.jcajce.JcaX509CertificateConverter this
        start local 1 // org.bouncycastle.cert.X509CertificateHolder certHolder
         0: .line 67
            aload 0 /* this */
            getfield org.bouncycastle.cert.jcajce.JcaX509CertificateConverter.helper:Lorg/bouncycastle/cert/jcajce/CertHelper;
            ldc "X.509"
            invokevirtual org.bouncycastle.cert.jcajce.CertHelper.getCertificateFactory:(Ljava/lang/String;)Ljava/security/cert/CertificateFactory;
            astore 2 /* cFact */
        start local 2 // java.security.cert.CertificateFactory cFact
         1: .line 69
            aload 2 /* cFact */
            new java.io.ByteArrayInputStream
            dup
            aload 1 /* certHolder */
            invokevirtual org.bouncycastle.cert.X509CertificateHolder.getEncoded:()[B
            invokespecial java.io.ByteArrayInputStream.<init>:([B)V
            invokevirtual java.security.cert.CertificateFactory.generateCertificate:(Ljava/io/InputStream;)Ljava/security/cert/Certificate;
            checkcast java.security.cert.X509Certificate
         2: areturn
        end local 2 // java.security.cert.CertificateFactory cFact
         3: .line 71
      StackMap locals:
      StackMap stack: java.io.IOException
            astore 2 /* e */
        start local 2 // java.io.IOException e
         4: .line 73
            new org.bouncycastle.cert.jcajce.JcaX509CertificateConverter$ExCertificateParsingException
            dup
            aload 0 /* this */
            new java.lang.StringBuilder
            dup
            ldc "exception parsing certificate: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 2 /* e */
            invokevirtual java.io.IOException.getMessage:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            aload 2 /* e */
            invokespecial org.bouncycastle.cert.jcajce.JcaX509CertificateConverter$ExCertificateParsingException.<init>:(Lorg/bouncycastle/cert/jcajce/JcaX509CertificateConverter;Ljava/lang/String;Ljava/lang/Throwable;)V
            athrow
        end local 2 // java.io.IOException e
         5: .line 75
      StackMap locals:
      StackMap stack: java.security.NoSuchProviderException
            astore 2 /* e */
        start local 2 // java.security.NoSuchProviderException e
         6: .line 77
            new org.bouncycastle.cert.jcajce.JcaX509CertificateConverter$ExCertificateException
            dup
            aload 0 /* this */
            new java.lang.StringBuilder
            dup
            ldc "cannot find required provider:"
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 2 /* e */
            invokevirtual java.security.NoSuchProviderException.getMessage:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            aload 2 /* e */
            invokespecial org.bouncycastle.cert.jcajce.JcaX509CertificateConverter$ExCertificateException.<init>:(Lorg/bouncycastle/cert/jcajce/JcaX509CertificateConverter;Ljava/lang/String;Ljava/lang/Throwable;)V
            athrow
        end local 2 // java.security.NoSuchProviderException e
        end local 1 // org.bouncycastle.cert.X509CertificateHolder certHolder
        end local 0 // org.bouncycastle.cert.jcajce.JcaX509CertificateConverter this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    7     0        this  Lorg/bouncycastle/cert/jcajce/JcaX509CertificateConverter;
            0    7     1  certHolder  Lorg/bouncycastle/cert/X509CertificateHolder;
            1    3     2       cFact  Ljava/security/cert/CertificateFactory;
            4    5     2           e  Ljava/io/IOException;
            6    7     2           e  Ljava/security/NoSuchProviderException;
      Exception table:
        from    to  target  type
           0     2       3  Class java.io.IOException
           0     2       5  Class java.security.NoSuchProviderException
    Exceptions:
      throws java.security.cert.CertificateException
    MethodParameters:
            Name  Flags
      certHolder  
}
SourceFile: "JcaX509CertificateConverter.java"
NestMembers:
  org.bouncycastle.cert.jcajce.JcaX509CertificateConverter$ExCertificateException  org.bouncycastle.cert.jcajce.JcaX509CertificateConverter$ExCertificateParsingException
InnerClasses:
  private ExCertificateException = org.bouncycastle.cert.jcajce.JcaX509CertificateConverter$ExCertificateException of org.bouncycastle.cert.jcajce.JcaX509CertificateConverter
  private ExCertificateParsingException = org.bouncycastle.cert.jcajce.JcaX509CertificateConverter$ExCertificateParsingException of org.bouncycastle.cert.jcajce.JcaX509CertificateConverter