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.asn1.x509.AlgorithmIdentifier extends org.bouncycastle.asn1.ASN1Encodable
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.asn1.x509.AlgorithmIdentifier
  super_class: org.bouncycastle.asn1.ASN1Encodable
{
  private org.bouncycastle.asn1.DERObjectIdentifier objectId;
    descriptor: Lorg/bouncycastle/asn1/DERObjectIdentifier;
    flags: (0x0002) ACC_PRIVATE

  private org.bouncycastle.asn1.DEREncodable parameters;
    descriptor: Lorg/bouncycastle/asn1/DEREncodable;
    flags: (0x0002) ACC_PRIVATE

  private boolean parametersDefined;
    descriptor: Z
    flags: (0x0002) ACC_PRIVATE

  public static org.bouncycastle.asn1.x509.AlgorithmIdentifier getInstance(org.bouncycastle.asn1.ASN1TaggedObject, boolean);
    descriptor: (Lorg/bouncycastle/asn1/ASN1TaggedObject;Z)Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.ASN1TaggedObject obj
        start local 1 // boolean explicit
         0: .line 25
            aload 0 /* obj */
            iload 1 /* explicit */
            invokestatic org.bouncycastle.asn1.ASN1Sequence.getInstance:(Lorg/bouncycastle/asn1/ASN1TaggedObject;Z)Lorg/bouncycastle/asn1/ASN1Sequence;
            invokestatic org.bouncycastle.asn1.x509.AlgorithmIdentifier.getInstance:(Ljava/lang/Object;)Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            areturn
        end local 1 // boolean explicit
        end local 0 // org.bouncycastle.asn1.ASN1TaggedObject obj
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0       obj  Lorg/bouncycastle/asn1/ASN1TaggedObject;
            0    1     1  explicit  Z
    MethodParameters:
          Name  Flags
      obj       
      explicit  

  public static org.bouncycastle.asn1.x509.AlgorithmIdentifier getInstance(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // java.lang.Object obj
         0: .line 31
            aload 0 /* obj */
            ifnull 1
            aload 0 /* obj */
            instanceof org.bouncycastle.asn1.x509.AlgorithmIdentifier
            ifeq 2
         1: .line 33
      StackMap locals:
      StackMap stack:
            aload 0 /* obj */
            checkcast org.bouncycastle.asn1.x509.AlgorithmIdentifier
            areturn
         2: .line 36
      StackMap locals:
      StackMap stack:
            aload 0 /* obj */
            instanceof org.bouncycastle.asn1.DERObjectIdentifier
            ifeq 4
         3: .line 38
            new org.bouncycastle.asn1.x509.AlgorithmIdentifier
            dup
            aload 0 /* obj */
            checkcast org.bouncycastle.asn1.DERObjectIdentifier
            invokespecial org.bouncycastle.asn1.x509.AlgorithmIdentifier.<init>:(Lorg/bouncycastle/asn1/DERObjectIdentifier;)V
            areturn
         4: .line 41
      StackMap locals:
      StackMap stack:
            aload 0 /* obj */
            instanceof java.lang.String
            ifeq 6
         5: .line 43
            new org.bouncycastle.asn1.x509.AlgorithmIdentifier
            dup
            aload 0 /* obj */
            checkcast java.lang.String
            invokespecial org.bouncycastle.asn1.x509.AlgorithmIdentifier.<init>:(Ljava/lang/String;)V
            areturn
         6: .line 46
      StackMap locals:
      StackMap stack:
            aload 0 /* obj */
            instanceof org.bouncycastle.asn1.ASN1Sequence
            ifeq 8
         7: .line 48
            new org.bouncycastle.asn1.x509.AlgorithmIdentifier
            dup
            aload 0 /* obj */
            checkcast org.bouncycastle.asn1.ASN1Sequence
            invokespecial org.bouncycastle.asn1.x509.AlgorithmIdentifier.<init>:(Lorg/bouncycastle/asn1/ASN1Sequence;)V
            areturn
         8: .line 51
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
            new java.lang.StringBuilder
            dup
            ldc "unknown object in factory: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* obj */
            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;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // java.lang.Object obj
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    9     0   obj  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      obj   

  public void <init>(org.bouncycastle.asn1.DERObjectIdentifier);
    descriptor: (Lorg/bouncycastle/asn1/DERObjectIdentifier;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.x509.AlgorithmIdentifier this
        start local 1 // org.bouncycastle.asn1.DERObjectIdentifier objectId
         0: .line 54
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 19
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.parametersDefined:Z
         2: .line 57
            aload 0 /* this */
            aload 1 /* objectId */
            putfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.objectId:Lorg/bouncycastle/asn1/DERObjectIdentifier;
         3: .line 58
            return
        end local 1 // org.bouncycastle.asn1.DERObjectIdentifier objectId
        end local 0 // org.bouncycastle.asn1.x509.AlgorithmIdentifier this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    4     0      this  Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            0    4     1  objectId  Lorg/bouncycastle/asn1/DERObjectIdentifier;
    MethodParameters:
          Name  Flags
      objectId  

  public void <init>(java.lang.String);
    descriptor: (Ljava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.x509.AlgorithmIdentifier this
        start local 1 // java.lang.String objectId
         0: .line 60
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 19
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.parametersDefined:Z
         2: .line 63
            aload 0 /* this */
            new org.bouncycastle.asn1.DERObjectIdentifier
            dup
            aload 1 /* objectId */
            invokespecial org.bouncycastle.asn1.DERObjectIdentifier.<init>:(Ljava/lang/String;)V
            putfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.objectId:Lorg/bouncycastle/asn1/DERObjectIdentifier;
         3: .line 64
            return
        end local 1 // java.lang.String objectId
        end local 0 // org.bouncycastle.asn1.x509.AlgorithmIdentifier this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    4     0      this  Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            0    4     1  objectId  Ljava/lang/String;
    MethodParameters:
          Name  Flags
      objectId  

  public void <init>(org.bouncycastle.asn1.DERObjectIdentifier, org.bouncycastle.asn1.DEREncodable);
    descriptor: (Lorg/bouncycastle/asn1/DERObjectIdentifier;Lorg/bouncycastle/asn1/DEREncodable;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // org.bouncycastle.asn1.x509.AlgorithmIdentifier this
        start local 1 // org.bouncycastle.asn1.DERObjectIdentifier objectId
        start local 2 // org.bouncycastle.asn1.DEREncodable parameters
         0: .line 66
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 19
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.parametersDefined:Z
         2: .line 70
            aload 0 /* this */
            iconst_1
            putfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.parametersDefined:Z
         3: .line 71
            aload 0 /* this */
            aload 1 /* objectId */
            putfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.objectId:Lorg/bouncycastle/asn1/DERObjectIdentifier;
         4: .line 72
            aload 0 /* this */
            aload 2 /* parameters */
            putfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.parameters:Lorg/bouncycastle/asn1/DEREncodable;
         5: .line 73
            return
        end local 2 // org.bouncycastle.asn1.DEREncodable parameters
        end local 1 // org.bouncycastle.asn1.DERObjectIdentifier objectId
        end local 0 // org.bouncycastle.asn1.x509.AlgorithmIdentifier this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    6     0        this  Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            0    6     1    objectId  Lorg/bouncycastle/asn1/DERObjectIdentifier;
            0    6     2  parameters  Lorg/bouncycastle/asn1/DEREncodable;
    MethodParameters:
            Name  Flags
      objectId    
      parameters  

  public void <init>(org.bouncycastle.asn1.ASN1Sequence);
    descriptor: (Lorg/bouncycastle/asn1/ASN1Sequence;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.x509.AlgorithmIdentifier this
        start local 1 // org.bouncycastle.asn1.ASN1Sequence seq
         0: .line 75
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 19
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.parametersDefined:Z
         2: .line 78
            aload 1 /* seq */
            invokevirtual org.bouncycastle.asn1.ASN1Sequence.size:()I
            iconst_1
            if_icmplt 3
            aload 1 /* seq */
            invokevirtual org.bouncycastle.asn1.ASN1Sequence.size:()I
            iconst_2
            if_icmple 6
         3: .line 80
      StackMap locals: org.bouncycastle.asn1.x509.AlgorithmIdentifier org.bouncycastle.asn1.ASN1Sequence
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Bad sequence size: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
         4: .line 81
            aload 1 /* seq */
            invokevirtual org.bouncycastle.asn1.ASN1Sequence.size:()I
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
         5: .line 80
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         6: .line 84
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 1 /* seq */
            iconst_0
            invokevirtual org.bouncycastle.asn1.ASN1Sequence.getObjectAt:(I)Lorg/bouncycastle/asn1/DEREncodable;
            invokestatic org.bouncycastle.asn1.DERObjectIdentifier.getInstance:(Ljava/lang/Object;)Lorg/bouncycastle/asn1/DERObjectIdentifier;
            putfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.objectId:Lorg/bouncycastle/asn1/DERObjectIdentifier;
         7: .line 86
            aload 1 /* seq */
            invokevirtual org.bouncycastle.asn1.ASN1Sequence.size:()I
            iconst_2
            if_icmpne 11
         8: .line 88
            aload 0 /* this */
            iconst_1
            putfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.parametersDefined:Z
         9: .line 89
            aload 0 /* this */
            aload 1 /* seq */
            iconst_1
            invokevirtual org.bouncycastle.asn1.ASN1Sequence.getObjectAt:(I)Lorg/bouncycastle/asn1/DEREncodable;
            putfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.parameters:Lorg/bouncycastle/asn1/DEREncodable;
        10: .line 90
            goto 12
        11: .line 93
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aconst_null
            putfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.parameters:Lorg/bouncycastle/asn1/DEREncodable;
        12: .line 95
      StackMap locals:
      StackMap stack:
            return
        end local 1 // org.bouncycastle.asn1.ASN1Sequence seq
        end local 0 // org.bouncycastle.asn1.x509.AlgorithmIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   13     0  this  Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            0   13     1   seq  Lorg/bouncycastle/asn1/ASN1Sequence;
    MethodParameters:
      Name  Flags
      seq   

  public org.bouncycastle.asn1.ASN1ObjectIdentifier getAlgorithm();
    descriptor: ()Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.x509.AlgorithmIdentifier this
         0: .line 99
            new org.bouncycastle.asn1.ASN1ObjectIdentifier
            dup
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.objectId:Lorg/bouncycastle/asn1/DERObjectIdentifier;
            invokevirtual org.bouncycastle.asn1.DERObjectIdentifier.getId:()Ljava/lang/String;
            invokespecial org.bouncycastle.asn1.ASN1ObjectIdentifier.<init>:(Ljava/lang/String;)V
            areturn
        end local 0 // org.bouncycastle.asn1.x509.AlgorithmIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;

  public org.bouncycastle.asn1.DERObjectIdentifier getObjectId();
    descriptor: ()Lorg/bouncycastle/asn1/DERObjectIdentifier;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.x509.AlgorithmIdentifier this
         0: .line 108
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.objectId:Lorg/bouncycastle/asn1/DERObjectIdentifier;
            areturn
        end local 0 // org.bouncycastle.asn1.x509.AlgorithmIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;

  public org.bouncycastle.asn1.DEREncodable getParameters();
    descriptor: ()Lorg/bouncycastle/asn1/DEREncodable;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.x509.AlgorithmIdentifier this
         0: .line 113
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.parameters:Lorg/bouncycastle/asn1/DEREncodable;
            areturn
        end local 0 // org.bouncycastle.asn1.x509.AlgorithmIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;

  public org.bouncycastle.asn1.DERObject toASN1Object();
    descriptor: ()Lorg/bouncycastle/asn1/DERObject;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=1
        start local 0 // org.bouncycastle.asn1.x509.AlgorithmIdentifier this
         0: .line 126
            new org.bouncycastle.asn1.ASN1EncodableVector
            dup
            invokespecial org.bouncycastle.asn1.ASN1EncodableVector.<init>:()V
            astore 1 /* v */
        start local 1 // org.bouncycastle.asn1.ASN1EncodableVector v
         1: .line 128
            aload 1 /* v */
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.objectId:Lorg/bouncycastle/asn1/DERObjectIdentifier;
            invokevirtual org.bouncycastle.asn1.ASN1EncodableVector.add:(Lorg/bouncycastle/asn1/DEREncodable;)V
         2: .line 130
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.parametersDefined:Z
            ifeq 7
         3: .line 132
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.parameters:Lorg/bouncycastle/asn1/DEREncodable;
            ifnull 6
         4: .line 134
            aload 1 /* v */
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x509.AlgorithmIdentifier.parameters:Lorg/bouncycastle/asn1/DEREncodable;
            invokevirtual org.bouncycastle.asn1.ASN1EncodableVector.add:(Lorg/bouncycastle/asn1/DEREncodable;)V
         5: .line 135
            goto 7
         6: .line 138
      StackMap locals: org.bouncycastle.asn1.ASN1EncodableVector
      StackMap stack:
            aload 1 /* v */
            getstatic org.bouncycastle.asn1.DERNull.INSTANCE:Lorg/bouncycastle/asn1/DERNull;
            invokevirtual org.bouncycastle.asn1.ASN1EncodableVector.add:(Lorg/bouncycastle/asn1/DEREncodable;)V
         7: .line 142
      StackMap locals:
      StackMap stack:
            new org.bouncycastle.asn1.DERSequence
            dup
            aload 1 /* v */
            invokespecial org.bouncycastle.asn1.DERSequence.<init>:(Lorg/bouncycastle/asn1/ASN1EncodableVector;)V
            areturn
        end local 1 // org.bouncycastle.asn1.ASN1EncodableVector v
        end local 0 // org.bouncycastle.asn1.x509.AlgorithmIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    8     0  this  Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            1    8     1     v  Lorg/bouncycastle/asn1/ASN1EncodableVector;
}
SourceFile: "AlgorithmIdentifier.java"