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.cms.bc.EnvelopedDataHelper$2 implements org.bouncycastle.operator.bc.BcDigestProvider
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.bouncycastle.cms.bc.EnvelopedDataHelper$2
  super_class: java.lang.Object
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.cms.bc.EnvelopedDataHelper$2 this
         0: .line 54
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.bouncycastle.cms.bc.EnvelopedDataHelper$2 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/cms/bc/EnvelopedDataHelper$2;

  public org.bouncycastle.crypto.ExtendedDigest get(org.bouncycastle.asn1.x509.AlgorithmIdentifier);
    descriptor: (Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;)Lorg/bouncycastle/crypto/ExtendedDigest;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.cms.bc.EnvelopedDataHelper$2 this
        start local 1 // org.bouncycastle.asn1.x509.AlgorithmIdentifier digestAlgorithmIdentifier
         0: .line 58
            new org.bouncycastle.crypto.digests.SHA224Digest
            dup
            invokespecial org.bouncycastle.crypto.digests.SHA224Digest.<init>:()V
            areturn
        end local 1 // org.bouncycastle.asn1.x509.AlgorithmIdentifier digestAlgorithmIdentifier
        end local 0 // org.bouncycastle.cms.bc.EnvelopedDataHelper$2 this
      LocalVariableTable:
        Start  End  Slot                       Name  Signature
            0    1     0                       this  Lorg/bouncycastle/cms/bc/EnvelopedDataHelper$2;
            0    1     1  digestAlgorithmIdentifier  Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
    MethodParameters:
                           Name  Flags
      digestAlgorithmIdentifier  
}
SourceFile: "EnvelopedDataHelper.java"
EnclosingMethod: org.bouncycastle.cms.bc.EnvelopedDataHelper.createTable:()Ljava/util/Map;
NestHost: org.bouncycastle.cms.bc.EnvelopedDataHelper
InnerClasses:
  org.bouncycastle.cms.bc.EnvelopedDataHelper$2