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.jce.provider.PKIXAttrCertPathValidatorSpi extends java.security.cert.CertPathValidatorSpi
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.jce.provider.PKIXAttrCertPathValidatorSpi
  super_class: java.security.cert.CertPathValidatorSpi
{
  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.jce.provider.PKIXAttrCertPathValidatorSpi this
         0: .line 24
            aload 0 /* this */
            invokespecial java.security.cert.CertPathValidatorSpi.<init>:()V
            return
        end local 0 // org.bouncycastle.jce.provider.PKIXAttrCertPathValidatorSpi this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/jce/provider/PKIXAttrCertPathValidatorSpi;

  public java.security.cert.CertPathValidatorResult engineValidate(java.security.cert.CertPath, java.security.cert.CertPathParameters);
    descriptor: (Ljava/security/cert/CertPath;Ljava/security/cert/CertPathParameters;)Ljava/security/cert/CertPathValidatorResult;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=11, args_size=3
        start local 0 // org.bouncycastle.jce.provider.PKIXAttrCertPathValidatorSpi this
        start local 1 // java.security.cert.CertPath certPath
        start local 2 // java.security.cert.CertPathParameters params
         0: .line 56
            aload 2 /* params */
            instanceof org.bouncycastle.x509.ExtendedPKIXParameters
            ifne 6
         1: .line 58
            new java.security.InvalidAlgorithmParameterException
            dup
         2: .line 59
            new java.lang.StringBuilder
            dup
            ldc "Parameters must be a "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
         3: .line 60
            ldc Lorg/bouncycastle/x509/ExtendedPKIXParameters;
            invokevirtual java.lang.Class.getName:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc " instance."
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
         4: .line 59
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
         5: .line 58
            invokespecial java.security.InvalidAlgorithmParameterException.<init>:(Ljava/lang/String;)V
            athrow
         6: .line 62
      StackMap locals:
      StackMap stack:
            aload 2 /* params */
            checkcast org.bouncycastle.x509.ExtendedPKIXParameters
            astore 3 /* pkixParams */
        start local 3 // org.bouncycastle.x509.ExtendedPKIXParameters pkixParams
         7: .line 64
            aload 3 /* pkixParams */
            invokevirtual org.bouncycastle.x509.ExtendedPKIXParameters.getTargetConstraints:()Lorg/bouncycastle/util/Selector;
            astore 4 /* certSelect */
        start local 4 // org.bouncycastle.util.Selector certSelect
         8: .line 65
            aload 4 /* certSelect */
            instanceof org.bouncycastle.x509.X509AttributeCertStoreSelector
            ifne 15
         9: .line 67
            new java.security.InvalidAlgorithmParameterException
            dup
        10: .line 68
            new java.lang.StringBuilder
            dup
            ldc "TargetConstraints must be an instance of "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
        11: .line 69
            ldc Lorg/bouncycastle/x509/X509AttributeCertStoreSelector;
            invokevirtual java.lang.Class.getName:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc " for "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
        12: .line 70
            aload 0 /* this */
            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;
            ldc " class."
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
        13: .line 68
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
        14: .line 67
            invokespecial java.security.InvalidAlgorithmParameterException.<init>:(Ljava/lang/String;)V
            athrow
        15: .line 72
      StackMap locals: org.bouncycastle.x509.ExtendedPKIXParameters org.bouncycastle.util.Selector
      StackMap stack:
            aload 4 /* certSelect */
            checkcast org.bouncycastle.x509.X509AttributeCertStoreSelector
        16: .line 73
            invokevirtual org.bouncycastle.x509.X509AttributeCertStoreSelector.getAttributeCert:()Lorg/bouncycastle/x509/X509AttributeCertificate;
        17: .line 72
            astore 5 /* attrCert */
        start local 5 // org.bouncycastle.x509.X509AttributeCertificate attrCert
        18: .line 75
            aload 5 /* attrCert */
            aload 3 /* pkixParams */
            invokestatic org.bouncycastle.jce.provider.RFC3281CertPathUtilities.processAttrCert1:(Lorg/bouncycastle/x509/X509AttributeCertificate;Lorg/bouncycastle/x509/ExtendedPKIXParameters;)Ljava/security/cert/CertPath;
            astore 6 /* holderCertPath */
        start local 6 // java.security.cert.CertPath holderCertPath
        19: .line 76
            aload 1 /* certPath */
            aload 3 /* pkixParams */
            invokestatic org.bouncycastle.jce.provider.RFC3281CertPathUtilities.processAttrCert2:(Ljava/security/cert/CertPath;Lorg/bouncycastle/x509/ExtendedPKIXParameters;)Ljava/security/cert/CertPathValidatorResult;
            astore 7 /* result */
        start local 7 // java.security.cert.CertPathValidatorResult result
        20: .line 77
            aload 1 /* certPath */
        21: .line 78
            invokevirtual java.security.cert.CertPath.getCertificates:()Ljava/util/List;
            iconst_0
            invokeinterface java.util.List.get:(I)Ljava/lang/Object;
            checkcast java.security.cert.X509Certificate
        22: .line 77
            astore 8 /* issuerCert */
        start local 8 // java.security.cert.X509Certificate issuerCert
        23: .line 79
            aload 8 /* issuerCert */
            aload 3 /* pkixParams */
            invokestatic org.bouncycastle.jce.provider.RFC3281CertPathUtilities.processAttrCert3:(Ljava/security/cert/X509Certificate;Lorg/bouncycastle/x509/ExtendedPKIXParameters;)V
        24: .line 80
            aload 8 /* issuerCert */
            aload 3 /* pkixParams */
            invokestatic org.bouncycastle.jce.provider.RFC3281CertPathUtilities.processAttrCert4:(Ljava/security/cert/X509Certificate;Lorg/bouncycastle/x509/ExtendedPKIXParameters;)V
        25: .line 81
            aload 5 /* attrCert */
            aload 3 /* pkixParams */
            invokestatic org.bouncycastle.jce.provider.RFC3281CertPathUtilities.processAttrCert5:(Lorg/bouncycastle/x509/X509AttributeCertificate;Lorg/bouncycastle/x509/ExtendedPKIXParameters;)V
        26: .line 83
            aload 5 /* attrCert */
            aload 1 /* certPath */
            aload 6 /* holderCertPath */
            aload 3 /* pkixParams */
            invokestatic org.bouncycastle.jce.provider.RFC3281CertPathUtilities.processAttrCert7:(Lorg/bouncycastle/x509/X509AttributeCertificate;Ljava/security/cert/CertPath;Ljava/security/cert/CertPath;Lorg/bouncycastle/x509/ExtendedPKIXParameters;)V
        27: .line 84
            aload 5 /* attrCert */
            aload 3 /* pkixParams */
            invokestatic org.bouncycastle.jce.provider.RFC3281CertPathUtilities.additionalChecks:(Lorg/bouncycastle/x509/X509AttributeCertificate;Lorg/bouncycastle/x509/ExtendedPKIXParameters;)V
        28: .line 85
            aconst_null
            astore 9 /* date */
        start local 9 // java.util.Date date
        29: .line 89
            aload 3 /* pkixParams */
            aconst_null
            iconst_m1
            invokestatic org.bouncycastle.jce.provider.CertPathValidatorUtilities.getValidCertDateFromValidityModel:(Lorg/bouncycastle/x509/ExtendedPKIXParameters;Ljava/security/cert/CertPath;I)Ljava/util/Date;
        30: .line 88
            astore 9 /* date */
        31: .line 90
            goto 36
        32: .line 91
      StackMap locals: org.bouncycastle.jce.provider.PKIXAttrCertPathValidatorSpi java.security.cert.CertPath java.security.cert.CertPathParameters org.bouncycastle.x509.ExtendedPKIXParameters org.bouncycastle.util.Selector org.bouncycastle.x509.X509AttributeCertificate java.security.cert.CertPath java.security.cert.CertPathValidatorResult java.security.cert.X509Certificate java.util.Date
      StackMap stack: org.bouncycastle.jce.provider.AnnotatedException
            astore 10 /* e */
        start local 10 // org.bouncycastle.jce.provider.AnnotatedException e
        33: .line 93
            new org.bouncycastle.jce.exception.ExtCertPathValidatorException
            dup
        34: .line 94
            ldc "Could not get validity date from attribute certificate."
            aload 10 /* e */
        35: .line 93
            invokespecial org.bouncycastle.jce.exception.ExtCertPathValidatorException.<init>:(Ljava/lang/String;Ljava/lang/Throwable;)V
            athrow
        end local 10 // org.bouncycastle.jce.provider.AnnotatedException e
        36: .line 96
      StackMap locals:
      StackMap stack:
            aload 5 /* attrCert */
            aload 3 /* pkixParams */
            aload 8 /* issuerCert */
            aload 9 /* date */
            aload 1 /* certPath */
            invokevirtual java.security.cert.CertPath.getCertificates:()Ljava/util/List;
            invokestatic org.bouncycastle.jce.provider.RFC3281CertPathUtilities.checkCRLs:(Lorg/bouncycastle/x509/X509AttributeCertificate;Lorg/bouncycastle/x509/ExtendedPKIXParameters;Ljava/security/cert/X509Certificate;Ljava/util/Date;Ljava/util/List;)V
        37: .line 97
            aload 7 /* result */
            areturn
        end local 9 // java.util.Date date
        end local 8 // java.security.cert.X509Certificate issuerCert
        end local 7 // java.security.cert.CertPathValidatorResult result
        end local 6 // java.security.cert.CertPath holderCertPath
        end local 5 // org.bouncycastle.x509.X509AttributeCertificate attrCert
        end local 4 // org.bouncycastle.util.Selector certSelect
        end local 3 // org.bouncycastle.x509.ExtendedPKIXParameters pkixParams
        end local 2 // java.security.cert.CertPathParameters params
        end local 1 // java.security.cert.CertPath certPath
        end local 0 // org.bouncycastle.jce.provider.PKIXAttrCertPathValidatorSpi this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0   38     0            this  Lorg/bouncycastle/jce/provider/PKIXAttrCertPathValidatorSpi;
            0   38     1        certPath  Ljava/security/cert/CertPath;
            0   38     2          params  Ljava/security/cert/CertPathParameters;
            7   38     3      pkixParams  Lorg/bouncycastle/x509/ExtendedPKIXParameters;
            8   38     4      certSelect  Lorg/bouncycastle/util/Selector;
           18   38     5        attrCert  Lorg/bouncycastle/x509/X509AttributeCertificate;
           19   38     6  holderCertPath  Ljava/security/cert/CertPath;
           20   38     7          result  Ljava/security/cert/CertPathValidatorResult;
           23   38     8      issuerCert  Ljava/security/cert/X509Certificate;
           29   38     9            date  Ljava/util/Date;
           33   36    10               e  Lorg/bouncycastle/jce/provider/AnnotatedException;
      Exception table:
        from    to  target  type
          29    31      32  Class org.bouncycastle.jce.provider.AnnotatedException
    Exceptions:
      throws java.security.cert.CertPathValidatorException, java.security.InvalidAlgorithmParameterException
    MethodParameters:
          Name  Flags
      certPath  
      params    
}
SourceFile: "PKIXAttrCertPathValidatorSpi.java"