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. 
class org.bouncycastle.cert.path.CertPathUtils
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.bouncycastle.cert.path.CertPathUtils
  super_class: java.lang.Object
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.cert.path.CertPathUtils this
         0: .line 8
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.bouncycastle.cert.path.CertPathUtils this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/cert/path/CertPathUtils;

  static java.util.Set getCriticalExtensionsOIDs(org.bouncycastle.cert.X509CertificateHolder[]);
    descriptor: ([Lorg/bouncycastle/cert/X509CertificateHolder;)Ljava/util/Set;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=3, args_size=1
        start local 0 // org.bouncycastle.cert.X509CertificateHolder[] certificates
         0: .line 12
            new java.util.HashSet
            dup
            invokespecial java.util.HashSet.<init>:()V
            astore 1 /* criticalExtensions */
        start local 1 // java.util.Set criticalExtensions
         1: .line 14
            iconst_0
            istore 2 /* i */
        start local 2 // int i
         2: goto 5
         3: .line 16
      StackMap locals: java.util.Set int
      StackMap stack:
            aload 1 /* criticalExtensions */
            aload 0 /* certificates */
            iload 2 /* i */
            aaload
            invokevirtual org.bouncycastle.cert.X509CertificateHolder.getCriticalExtensionOIDs:()Ljava/util/Set;
            invokeinterface java.util.Set.addAll:(Ljava/util/Collection;)Z
            pop
         4: .line 14
            iinc 2 /* i */ 1
      StackMap locals:
      StackMap stack:
         5: iload 2 /* i */
            aload 0 /* certificates */
            arraylength
            if_icmpne 3
        end local 2 // int i
         6: .line 19
            aload 1 /* criticalExtensions */
            areturn
        end local 1 // java.util.Set criticalExtensions
        end local 0 // org.bouncycastle.cert.X509CertificateHolder[] certificates
      LocalVariableTable:
        Start  End  Slot                Name  Signature
            0    7     0        certificates  [Lorg/bouncycastle/cert/X509CertificateHolder;
            1    7     1  criticalExtensions  Ljava/util/Set;
            2    6     2                   i  I
    MethodParameters:
              Name  Flags
      certificates  
}
SourceFile: "CertPathUtils.java"