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 to JDK 1.8.
  • The Legion of the Bouncy Castle Inc. 
public class org.bouncycastle.crypto.params.DHPublicKeyParameters extends org.bouncycastle.crypto.params.DHKeyParameters
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.crypto.params.DHPublicKeyParameters
  super_class: org.bouncycastle.crypto.params.DHKeyParameters
{
  private static final java.math.BigInteger ONE;
    descriptor: Ljava/math/BigInteger;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private static final java.math.BigInteger TWO;
    descriptor: Ljava/math/BigInteger;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private java.math.BigInteger y;
    descriptor: Ljava/math/BigInteger;
    flags: (0x0002) ACC_PRIVATE

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 8
            lconst_1
            invokestatic java.math.BigInteger.valueOf:(J)Ljava/math/BigInteger;
            putstatic org.bouncycastle.crypto.params.DHPublicKeyParameters.ONE:Ljava/math/BigInteger;
         1: .line 9
            ldc 2
            invokestatic java.math.BigInteger.valueOf:(J)Ljava/math/BigInteger;
            putstatic org.bouncycastle.crypto.params.DHPublicKeyParameters.TWO:Ljava/math/BigInteger;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>(java.math.BigInteger, org.bouncycastle.crypto.params.DHParameters);
    descriptor: (Ljava/math/BigInteger;Lorg/bouncycastle/crypto/params/DHParameters;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=3, args_size=3
        start local 0 // org.bouncycastle.crypto.params.DHPublicKeyParameters this
        start local 1 // java.math.BigInteger y
        start local 2 // org.bouncycastle.crypto.params.DHParameters params
         0: .line 17
            aload 0 /* this */
            iconst_0
            aload 2 /* params */
            invokespecial org.bouncycastle.crypto.params.DHKeyParameters.<init>:(ZLorg/bouncycastle/crypto/params/DHParameters;)V
         1: .line 19
            aload 0 /* this */
            aload 0 /* this */
            aload 1 /* y */
            aload 2 /* params */
            invokevirtual org.bouncycastle.crypto.params.DHPublicKeyParameters.validate:(Ljava/math/BigInteger;Lorg/bouncycastle/crypto/params/DHParameters;)Ljava/math/BigInteger;
            putfield org.bouncycastle.crypto.params.DHPublicKeyParameters.y:Ljava/math/BigInteger;
         2: .line 20
            return
        end local 2 // org.bouncycastle.crypto.params.DHParameters params
        end local 1 // java.math.BigInteger y
        end local 0 // org.bouncycastle.crypto.params.DHPublicKeyParameters this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    3     0    this  Lorg/bouncycastle/crypto/params/DHPublicKeyParameters;
            0    3     1       y  Ljava/math/BigInteger;
            0    3     2  params  Lorg/bouncycastle/crypto/params/DHParameters;
    MethodParameters:
        Name  Flags
      y       
      params  

  private java.math.BigInteger validate(java.math.BigInteger, org.bouncycastle.crypto.params.DHParameters);
    descriptor: (Ljava/math/BigInteger;Lorg/bouncycastle/crypto/params/DHParameters;)Ljava/math/BigInteger;
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=4, locals=3, args_size=3
        start local 0 // org.bouncycastle.crypto.params.DHPublicKeyParameters this
        start local 1 // java.math.BigInteger y
        start local 2 // org.bouncycastle.crypto.params.DHParameters dhParams
         0: .line 24
            aload 1 /* y */
            ifnonnull 2
         1: .line 26
            new java.lang.NullPointerException
            dup
            ldc "y value cannot be null"
            invokespecial java.lang.NullPointerException.<init>:(Ljava/lang/String;)V
            athrow
         2: .line 30
      StackMap locals:
      StackMap stack:
            aload 1 /* y */
            getstatic org.bouncycastle.crypto.params.DHPublicKeyParameters.TWO:Ljava/math/BigInteger;
            invokevirtual java.math.BigInteger.compareTo:(Ljava/math/BigInteger;)I
            iflt 3
            aload 1 /* y */
            aload 2 /* dhParams */
            invokevirtual org.bouncycastle.crypto.params.DHParameters.getP:()Ljava/math/BigInteger;
            getstatic org.bouncycastle.crypto.params.DHPublicKeyParameters.TWO:Ljava/math/BigInteger;
            invokevirtual java.math.BigInteger.subtract:(Ljava/math/BigInteger;)Ljava/math/BigInteger;
            invokevirtual java.math.BigInteger.compareTo:(Ljava/math/BigInteger;)I
            ifle 4
         3: .line 32
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
            ldc "invalid DH public key"
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         4: .line 35
      StackMap locals:
      StackMap stack:
            aload 2 /* dhParams */
            invokevirtual org.bouncycastle.crypto.params.DHParameters.getQ:()Ljava/math/BigInteger;
            ifnull 8
         5: .line 37
            getstatic org.bouncycastle.crypto.params.DHPublicKeyParameters.ONE:Ljava/math/BigInteger;
            aload 1 /* y */
            aload 2 /* dhParams */
            invokevirtual org.bouncycastle.crypto.params.DHParameters.getQ:()Ljava/math/BigInteger;
            aload 2 /* dhParams */
            invokevirtual org.bouncycastle.crypto.params.DHParameters.getP:()Ljava/math/BigInteger;
            invokevirtual java.math.BigInteger.modPow:(Ljava/math/BigInteger;Ljava/math/BigInteger;)Ljava/math/BigInteger;
            invokevirtual java.math.BigInteger.equals:(Ljava/lang/Object;)Z
            ifeq 7
         6: .line 39
            aload 1 /* y */
            areturn
         7: .line 42
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
            ldc "Y value does not appear to be in correct group"
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         8: .line 46
      StackMap locals:
      StackMap stack:
            aload 1 /* y */
            areturn
        end local 2 // org.bouncycastle.crypto.params.DHParameters dhParams
        end local 1 // java.math.BigInteger y
        end local 0 // org.bouncycastle.crypto.params.DHPublicKeyParameters this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    9     0      this  Lorg/bouncycastle/crypto/params/DHPublicKeyParameters;
            0    9     1         y  Ljava/math/BigInteger;
            0    9     2  dhParams  Lorg/bouncycastle/crypto/params/DHParameters;
    MethodParameters:
          Name  Flags
      y         
      dhParams  

  public java.math.BigInteger getY();
    descriptor: ()Ljava/math/BigInteger;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.crypto.params.DHPublicKeyParameters this
         0: .line 52
            aload 0 /* this */
            getfield org.bouncycastle.crypto.params.DHPublicKeyParameters.y:Ljava/math/BigInteger;
            areturn
        end local 0 // org.bouncycastle.crypto.params.DHPublicKeyParameters this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/crypto/params/DHPublicKeyParameters;

  public int hashCode();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.bouncycastle.crypto.params.DHPublicKeyParameters this
         0: .line 57
            aload 0 /* this */
            getfield org.bouncycastle.crypto.params.DHPublicKeyParameters.y:Ljava/math/BigInteger;
            invokevirtual java.math.BigInteger.hashCode:()I
            aload 0 /* this */
            invokespecial org.bouncycastle.crypto.params.DHKeyParameters.hashCode:()I
            ixor
            ireturn
        end local 0 // org.bouncycastle.crypto.params.DHPublicKeyParameters this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/crypto/params/DHPublicKeyParameters;

  public boolean equals(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // org.bouncycastle.crypto.params.DHPublicKeyParameters this
        start local 1 // java.lang.Object obj
         0: .line 63
            aload 1 /* obj */
            instanceof org.bouncycastle.crypto.params.DHPublicKeyParameters
            ifne 2
         1: .line 65
            iconst_0
            ireturn
         2: .line 68
      StackMap locals:
      StackMap stack:
            aload 1 /* obj */
            checkcast org.bouncycastle.crypto.params.DHPublicKeyParameters
            astore 2 /* other */
        start local 2 // org.bouncycastle.crypto.params.DHPublicKeyParameters other
         3: .line 70
            aload 2 /* other */
            invokevirtual org.bouncycastle.crypto.params.DHPublicKeyParameters.getY:()Ljava/math/BigInteger;
            aload 0 /* this */
            getfield org.bouncycastle.crypto.params.DHPublicKeyParameters.y:Ljava/math/BigInteger;
            invokevirtual java.math.BigInteger.equals:(Ljava/lang/Object;)Z
            ifeq 4
            aload 0 /* this */
            aload 1 /* obj */
            invokespecial org.bouncycastle.crypto.params.DHKeyParameters.equals:(Ljava/lang/Object;)Z
            ifeq 4
            iconst_1
            ireturn
      StackMap locals: org.bouncycastle.crypto.params.DHPublicKeyParameters
      StackMap stack:
         4: iconst_0
            ireturn
        end local 2 // org.bouncycastle.crypto.params.DHPublicKeyParameters other
        end local 1 // java.lang.Object obj
        end local 0 // org.bouncycastle.crypto.params.DHPublicKeyParameters this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    5     0   this  Lorg/bouncycastle/crypto/params/DHPublicKeyParameters;
            0    5     1    obj  Ljava/lang/Object;
            3    5     2  other  Lorg/bouncycastle/crypto/params/DHPublicKeyParameters;
    MethodParameters:
      Name  Flags
      obj   
}
SourceFile: "DHPublicKeyParameters.java"