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.operator.jcajce.JceInputDecryptorProviderBuilder$1 implements org.bouncycastle.operator.InputDecryptorProvider
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1
  super_class: java.lang.Object
{
  private javax.crypto.Cipher cipher;
    descriptor: Ljavax/crypto/Cipher;
    flags: (0x0002) ACC_PRIVATE

  private org.bouncycastle.asn1.x509.AlgorithmIdentifier encryptionAlg;
    descriptor: Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
    flags: (0x0002) ACC_PRIVATE

  final org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder this$0;
    descriptor: Lorg/bouncycastle/operator/jcajce/JceInputDecryptorProviderBuilder;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  private final byte[] val$encKeyBytes;
    descriptor: [B
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder, byte[]);
    descriptor: (Lorg/bouncycastle/operator/jcajce/JceInputDecryptorProviderBuilder;[B)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1 this
         0: .line 62
            aload 0 /* this */
            aload 1
            putfield org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1.this$0:Lorg/bouncycastle/operator/jcajce/JceInputDecryptorProviderBuilder;
            aload 0 /* this */
            aload 2
            putfield org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1.val$encKeyBytes:[B
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/operator/jcajce/JceInputDecryptorProviderBuilder$1;
    MethodParameters:
                 Name  Flags
      this$0           final
      val$encKeyBytes  final

  public org.bouncycastle.operator.InputDecryptor get(org.bouncycastle.asn1.x509.AlgorithmIdentifier);
    descriptor: (Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;)Lorg/bouncycastle/operator/InputDecryptor;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=7, locals=6, args_size=2
        start local 0 // org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1 this
        start local 1 // org.bouncycastle.asn1.x509.AlgorithmIdentifier algorithmIdentifier
         0: .line 70
            aload 0 /* this */
            aload 1 /* algorithmIdentifier */
            putfield org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1.encryptionAlg:Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
         1: .line 72
            aload 1 /* algorithmIdentifier */
            invokevirtual org.bouncycastle.asn1.x509.AlgorithmIdentifier.getAlgorithm:()Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            astore 2 /* algorithm */
        start local 2 // org.bouncycastle.asn1.ASN1ObjectIdentifier algorithm
         2: .line 76
            aload 0 /* this */
            aload 0 /* this */
            getfield org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1.this$0:Lorg/bouncycastle/operator/jcajce/JceInputDecryptorProviderBuilder;
            getfield org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder.helper:Lorg/bouncycastle/jcajce/util/JcaJceHelper;
            aload 2 /* algorithm */
            invokevirtual org.bouncycastle.asn1.ASN1ObjectIdentifier.getId:()Ljava/lang/String;
            invokeinterface org.bouncycastle.jcajce.util.JcaJceHelper.createCipher:(Ljava/lang/String;)Ljavax/crypto/Cipher;
            putfield org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1.cipher:Ljavax/crypto/Cipher;
         3: .line 77
            new javax.crypto.spec.SecretKeySpec
            dup
            aload 0 /* this */
            getfield org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1.val$encKeyBytes:[B
            aload 2 /* algorithm */
            invokevirtual org.bouncycastle.asn1.ASN1ObjectIdentifier.getId:()Ljava/lang/String;
            invokespecial javax.crypto.spec.SecretKeySpec.<init>:([BLjava/lang/String;)V
            astore 3 /* key */
        start local 3 // javax.crypto.SecretKey key
         4: .line 79
            aload 1 /* algorithmIdentifier */
            invokevirtual org.bouncycastle.asn1.x509.AlgorithmIdentifier.getParameters:()Lorg/bouncycastle/asn1/ASN1Encodable;
            astore 4 /* encParams */
        start local 4 // org.bouncycastle.asn1.ASN1Encodable encParams
         5: .line 81
            aload 4 /* encParams */
            instanceof org.bouncycastle.asn1.ASN1OctetString
            ifeq 8
         6: .line 83
            aload 0 /* this */
            getfield org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1.cipher:Ljavax/crypto/Cipher;
            iconst_2
            aload 3 /* key */
            new javax.crypto.spec.IvParameterSpec
            dup
            aload 4 /* encParams */
            invokestatic org.bouncycastle.asn1.ASN1OctetString.getInstance:(Ljava/lang/Object;)Lorg/bouncycastle/asn1/ASN1OctetString;
            invokevirtual org.bouncycastle.asn1.ASN1OctetString.getOctets:()[B
            invokespecial javax.crypto.spec.IvParameterSpec.<init>:([B)V
            invokevirtual javax.crypto.Cipher.init:(ILjava/security/Key;Ljava/security/spec/AlgorithmParameterSpec;)V
         7: .line 84
            goto 13
         8: .line 88
      StackMap locals: org.bouncycastle.asn1.ASN1ObjectIdentifier javax.crypto.SecretKey org.bouncycastle.asn1.ASN1Encodable
      StackMap stack:
            aload 4 /* encParams */
            invokestatic org.bouncycastle.asn1.cryptopro.GOST28147Parameters.getInstance:(Ljava/lang/Object;)Lorg/bouncycastle/asn1/cryptopro/GOST28147Parameters;
            astore 5 /* gParams */
        start local 5 // org.bouncycastle.asn1.cryptopro.GOST28147Parameters gParams
         9: .line 90
            aload 0 /* this */
            getfield org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1.cipher:Ljavax/crypto/Cipher;
            iconst_2
            aload 3 /* key */
            new org.bouncycastle.jcajce.spec.GOST28147ParameterSpec
            dup
            aload 5 /* gParams */
            invokevirtual org.bouncycastle.asn1.cryptopro.GOST28147Parameters.getEncryptionParamSet:()Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            aload 5 /* gParams */
            invokevirtual org.bouncycastle.asn1.cryptopro.GOST28147Parameters.getIV:()[B
            invokespecial org.bouncycastle.jcajce.spec.GOST28147ParameterSpec.<init>:(Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;[B)V
            invokevirtual javax.crypto.Cipher.init:(ILjava/security/Key;Ljava/security/spec/AlgorithmParameterSpec;)V
        end local 5 // org.bouncycastle.asn1.cryptopro.GOST28147Parameters gParams
        end local 4 // org.bouncycastle.asn1.ASN1Encodable encParams
        end local 3 // javax.crypto.SecretKey key
        10: .line 92
            goto 13
        11: .line 93
      StackMap locals: org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1 org.bouncycastle.asn1.x509.AlgorithmIdentifier org.bouncycastle.asn1.ASN1ObjectIdentifier
      StackMap stack: java.lang.Exception
            astore 3 /* e */
        start local 3 // java.lang.Exception e
        12: .line 95
            new org.bouncycastle.operator.OperatorCreationException
            dup
            new java.lang.StringBuilder
            dup
            ldc "unable to create InputDecryptor: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 3 /* e */
            invokevirtual java.lang.Exception.getMessage:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            aload 3 /* e */
            invokespecial org.bouncycastle.operator.OperatorCreationException.<init>:(Ljava/lang/String;Ljava/lang/Throwable;)V
            athrow
        end local 3 // java.lang.Exception e
        13: .line 98
      StackMap locals:
      StackMap stack:
            new org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1$1
            dup
            aload 0 /* this */
            invokespecial org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1$1.<init>:(Lorg/bouncycastle/operator/jcajce/JceInputDecryptorProviderBuilder$1;)V
            areturn
        end local 2 // org.bouncycastle.asn1.ASN1ObjectIdentifier algorithm
        end local 1 // org.bouncycastle.asn1.x509.AlgorithmIdentifier algorithmIdentifier
        end local 0 // org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1 this
      LocalVariableTable:
        Start  End  Slot                 Name  Signature
            0   14     0                 this  Lorg/bouncycastle/operator/jcajce/JceInputDecryptorProviderBuilder$1;
            0   14     1  algorithmIdentifier  Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            2   14     2            algorithm  Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            4   10     3                  key  Ljavax/crypto/SecretKey;
            5   10     4            encParams  Lorg/bouncycastle/asn1/ASN1Encodable;
            9   10     5              gParams  Lorg/bouncycastle/asn1/cryptopro/GOST28147Parameters;
           12   13     3                    e  Ljava/lang/Exception;
      Exception table:
        from    to  target  type
           2    10      11  Class java.lang.Exception
    Exceptions:
      throws org.bouncycastle.operator.OperatorCreationException
    MethodParameters:
                     Name  Flags
      algorithmIdentifier  final
}
SourceFile: "JceInputDecryptorProviderBuilder.java"
EnclosingMethod: org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder.build:([B)Lorg/bouncycastle/operator/InputDecryptorProvider;
NestHost: org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder
InnerClasses:
  org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1
  org.bouncycastle.operator.jcajce.JceInputDecryptorProviderBuilder$1$1