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 final class org.bouncycastle.crypto.params.X25519PrivateKeyParameters extends org.bouncycastle.crypto.params.AsymmetricKeyParameter
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: org.bouncycastle.crypto.params.X25519PrivateKeyParameters
  super_class: org.bouncycastle.crypto.params.AsymmetricKeyParameter
{
  public static final int KEY_SIZE;
    descriptor: I
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: 32

  public static final int SECRET_SIZE;
    descriptor: I
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: 32

  private final byte[] data;
    descriptor: [B
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  public void <init>(java.security.SecureRandom);
    descriptor: (Ljava/security/SecureRandom;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.crypto.params.X25519PrivateKeyParameters this
        start local 1 // java.security.SecureRandom random
         0: .line 22
            aload 0 /* this */
            iconst_1
            invokespecial org.bouncycastle.crypto.params.AsymmetricKeyParameter.<init>:(Z)V
         1: .line 18
            aload 0 /* this */
            bipush 32
            newarray 8
            putfield org.bouncycastle.crypto.params.X25519PrivateKeyParameters.data:[B
         2: .line 24
            aload 1 /* random */
            aload 0 /* this */
            getfield org.bouncycastle.crypto.params.X25519PrivateKeyParameters.data:[B
            invokestatic org.bouncycastle.math.ec.rfc7748.X25519.generatePrivateKey:(Ljava/security/SecureRandom;[B)V
         3: .line 25
            return
        end local 1 // java.security.SecureRandom random
        end local 0 // org.bouncycastle.crypto.params.X25519PrivateKeyParameters this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    4     0    this  Lorg/bouncycastle/crypto/params/X25519PrivateKeyParameters;
            0    4     1  random  Ljava/security/SecureRandom;
    MethodParameters:
        Name  Flags
      random  

  public void <init>(byte[], int);
    descriptor: ([BI)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=3, args_size=3
        start local 0 // org.bouncycastle.crypto.params.X25519PrivateKeyParameters this
        start local 1 // byte[] buf
        start local 2 // int off
         0: .line 29
            aload 0 /* this */
            iconst_1
            invokespecial org.bouncycastle.crypto.params.AsymmetricKeyParameter.<init>:(Z)V
         1: .line 18
            aload 0 /* this */
            bipush 32
            newarray 8
            putfield org.bouncycastle.crypto.params.X25519PrivateKeyParameters.data:[B
         2: .line 31
            aload 1 /* buf */
            iload 2 /* off */
            aload 0 /* this */
            getfield org.bouncycastle.crypto.params.X25519PrivateKeyParameters.data:[B
            iconst_0
            bipush 32
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
         3: .line 32
            return
        end local 2 // int off
        end local 1 // byte[] buf
        end local 0 // org.bouncycastle.crypto.params.X25519PrivateKeyParameters this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lorg/bouncycastle/crypto/params/X25519PrivateKeyParameters;
            0    4     1   buf  [B
            0    4     2   off  I
    MethodParameters:
      Name  Flags
      buf   
      off   

  public void <init>(java.io.InputStream);
    descriptor: (Ljava/io/InputStream;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.bouncycastle.crypto.params.X25519PrivateKeyParameters this
        start local 1 // java.io.InputStream input
         0: .line 36
            aload 0 /* this */
            iconst_1
            invokespecial org.bouncycastle.crypto.params.AsymmetricKeyParameter.<init>:(Z)V
         1: .line 18
            aload 0 /* this */
            bipush 32
            newarray 8
            putfield org.bouncycastle.crypto.params.X25519PrivateKeyParameters.data:[B
         2: .line 38
            bipush 32
            aload 1 /* input */
            aload 0 /* this */
            getfield org.bouncycastle.crypto.params.X25519PrivateKeyParameters.data:[B
            invokestatic org.bouncycastle.util.io.Streams.readFully:(Ljava/io/InputStream;[B)I
            if_icmpeq 4
         3: .line 40
            new java.io.EOFException
            dup
            ldc "EOF encountered in middle of X25519 private key"
            invokespecial java.io.EOFException.<init>:(Ljava/lang/String;)V
            athrow
         4: .line 42
      StackMap locals: org.bouncycastle.crypto.params.X25519PrivateKeyParameters java.io.InputStream
      StackMap stack:
            return
        end local 1 // java.io.InputStream input
        end local 0 // org.bouncycastle.crypto.params.X25519PrivateKeyParameters this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    5     0   this  Lorg/bouncycastle/crypto/params/X25519PrivateKeyParameters;
            0    5     1  input  Ljava/io/InputStream;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
       Name  Flags
      input  

  public void encode(byte[], int);
    descriptor: ([BI)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=3, args_size=3
        start local 0 // org.bouncycastle.crypto.params.X25519PrivateKeyParameters this
        start local 1 // byte[] buf
        start local 2 // int off
         0: .line 46
            aload 0 /* this */
            getfield org.bouncycastle.crypto.params.X25519PrivateKeyParameters.data:[B
            iconst_0
            aload 1 /* buf */
            iload 2 /* off */
            bipush 32
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
         1: .line 47
            return
        end local 2 // int off
        end local 1 // byte[] buf
        end local 0 // org.bouncycastle.crypto.params.X25519PrivateKeyParameters this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/bouncycastle/crypto/params/X25519PrivateKeyParameters;
            0    2     1   buf  [B
            0    2     2   off  I
    MethodParameters:
      Name  Flags
      buf   
      off   

  public byte[] getEncoded();
    descriptor: ()[B
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.crypto.params.X25519PrivateKeyParameters this
         0: .line 51
            aload 0 /* this */
            getfield org.bouncycastle.crypto.params.X25519PrivateKeyParameters.data:[B
            invokestatic org.bouncycastle.util.Arrays.clone:([B)[B
            areturn
        end local 0 // org.bouncycastle.crypto.params.X25519PrivateKeyParameters this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/crypto/params/X25519PrivateKeyParameters;

  public org.bouncycastle.crypto.params.X25519PublicKeyParameters generatePublicKey();
    descriptor: ()Lorg/bouncycastle/crypto/params/X25519PublicKeyParameters;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=1
        start local 0 // org.bouncycastle.crypto.params.X25519PrivateKeyParameters this
         0: .line 56
            bipush 32
            newarray 8
            astore 1 /* publicKey */
        start local 1 // byte[] publicKey
         1: .line 57
            aload 0 /* this */
            getfield org.bouncycastle.crypto.params.X25519PrivateKeyParameters.data:[B
            iconst_0
            aload 1 /* publicKey */
            iconst_0
            invokestatic org.bouncycastle.math.ec.rfc7748.X25519.generatePublicKey:([BI[BI)V
         2: .line 58
            new org.bouncycastle.crypto.params.X25519PublicKeyParameters
            dup
            aload 1 /* publicKey */
            iconst_0
            invokespecial org.bouncycastle.crypto.params.X25519PublicKeyParameters.<init>:([BI)V
            areturn
        end local 1 // byte[] publicKey
        end local 0 // org.bouncycastle.crypto.params.X25519PrivateKeyParameters this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    3     0       this  Lorg/bouncycastle/crypto/params/X25519PrivateKeyParameters;
            1    3     1  publicKey  [B

  public void generateSecret(org.bouncycastle.crypto.params.X25519PublicKeyParameters, byte[], int);
    descriptor: (Lorg/bouncycastle/crypto/params/X25519PublicKeyParameters;[BI)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=5, args_size=4
        start local 0 // org.bouncycastle.crypto.params.X25519PrivateKeyParameters this
        start local 1 // org.bouncycastle.crypto.params.X25519PublicKeyParameters publicKey
        start local 2 // byte[] buf
        start local 3 // int off
         0: .line 63
            bipush 32
            newarray 8
            astore 4 /* encoded */
        start local 4 // byte[] encoded
         1: .line 64
            aload 1 /* publicKey */
            aload 4 /* encoded */
            iconst_0
            invokevirtual org.bouncycastle.crypto.params.X25519PublicKeyParameters.encode:([BI)V
         2: .line 65
            aload 0 /* this */
            getfield org.bouncycastle.crypto.params.X25519PrivateKeyParameters.data:[B
            iconst_0
            aload 4 /* encoded */
            iconst_0
            aload 2 /* buf */
            iload 3 /* off */
            invokestatic org.bouncycastle.math.ec.rfc7748.X25519.calculateAgreement:([BI[BI[BI)Z
            ifne 4
         3: .line 67
            new java.lang.IllegalStateException
            dup
            ldc "X25519 agreement failed"
            invokespecial java.lang.IllegalStateException.<init>:(Ljava/lang/String;)V
            athrow
         4: .line 69
      StackMap locals: byte[]
      StackMap stack:
            return
        end local 4 // byte[] encoded
        end local 3 // int off
        end local 2 // byte[] buf
        end local 1 // org.bouncycastle.crypto.params.X25519PublicKeyParameters publicKey
        end local 0 // org.bouncycastle.crypto.params.X25519PrivateKeyParameters this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    5     0       this  Lorg/bouncycastle/crypto/params/X25519PrivateKeyParameters;
            0    5     1  publicKey  Lorg/bouncycastle/crypto/params/X25519PublicKeyParameters;
            0    5     2        buf  [B
            0    5     3        off  I
            1    5     4    encoded  [B
    MethodParameters:
           Name  Flags
      publicKey  
      buf        
      off        
}
SourceFile: "X25519PrivateKeyParameters.java"