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 interface org.bouncycastle.asn1.smime.SMIMEAttributes
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.bouncycastle.asn1.smime.SMIMEAttributes
  super_class: java.lang.Object
{
  public static final org.bouncycastle.asn1.DERObjectIdentifier smimeCapabilities;
    descriptor: Lorg/bouncycastle/asn1/DERObjectIdentifier;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final org.bouncycastle.asn1.DERObjectIdentifier encrypKeyPref;
    descriptor: Lorg/bouncycastle/asn1/DERObjectIdentifier;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 8
            getstatic org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers.pkcs_9_at_smimeCapabilities:Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            putstatic org.bouncycastle.asn1.smime.SMIMEAttributes.smimeCapabilities:Lorg/bouncycastle/asn1/DERObjectIdentifier;
         1: .line 9
            getstatic org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers.id_aa_encrypKeyPref:Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            putstatic org.bouncycastle.asn1.smime.SMIMEAttributes.encrypKeyPref:Lorg/bouncycastle/asn1/DERObjectIdentifier;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
SourceFile: "SMIMEAttributes.java"