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.crypto.generators.OpenSSLPBEParametersGenerator extends org.bouncycastle.crypto.PBEParametersGenerator
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator
  super_class: org.bouncycastle.crypto.PBEParametersGenerator
{
  private org.bouncycastle.crypto.Digest digest;
    descriptor: Lorg/bouncycastle/crypto/Digest;
    flags: (0x0002) ACC_PRIVATE

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator this
         0: .line 25
            aload 0 /* this */
            invokespecial org.bouncycastle.crypto.PBEParametersGenerator.<init>:()V
         1: .line 20
            aload 0 /* this */
            new org.bouncycastle.crypto.digests.MD5Digest
            dup
            invokespecial org.bouncycastle.crypto.digests.MD5Digest.<init>:()V
            putfield org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator.digest:Lorg/bouncycastle/crypto/Digest;
         2: .line 27
            return
        end local 0 // org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/bouncycastle/crypto/generators/OpenSSLPBEParametersGenerator;

  public void init(byte[], byte[]);
    descriptor: ([B[B)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=3, args_size=3
        start local 0 // org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator this
        start local 1 // byte[] password
        start local 2 // byte[] salt
         0: .line 39
            aload 0 /* this */
            aload 1 /* password */
            aload 2 /* salt */
            iconst_1
            invokespecial org.bouncycastle.crypto.PBEParametersGenerator.init:([B[BI)V
         1: .line 40
            return
        end local 2 // byte[] salt
        end local 1 // byte[] password
        end local 0 // org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    2     0      this  Lorg/bouncycastle/crypto/generators/OpenSSLPBEParametersGenerator;
            0    2     1  password  [B
            0    2     2      salt  [B
    MethodParameters:
          Name  Flags
      password  
      salt      

  private byte[] generateDerivedKey(int);
    descriptor: (I)[B
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=5, locals=6, args_size=2
        start local 0 // org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator this
        start local 1 // int bytesNeeded
         0: .line 48
            aload 0 /* this */
            getfield org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator.digest:Lorg/bouncycastle/crypto/Digest;
            invokeinterface org.bouncycastle.crypto.Digest.getDigestSize:()I
            newarray 8
            astore 2 /* buf */
        start local 2 // byte[] buf
         1: .line 49
            iload 1 /* bytesNeeded */
            newarray 8
            astore 3 /* key */
        start local 3 // byte[] key
         2: .line 50
            iconst_0
            istore 4 /* offset */
        start local 4 // int offset
         3: .line 54
      StackMap locals: byte[] byte[] int
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator.digest:Lorg/bouncycastle/crypto/Digest;
            aload 0 /* this */
            getfield org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator.password:[B
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator.password:[B
            arraylength
            invokeinterface org.bouncycastle.crypto.Digest.update:([BII)V
         4: .line 55
            aload 0 /* this */
            getfield org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator.digest:Lorg/bouncycastle/crypto/Digest;
            aload 0 /* this */
            getfield org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator.salt:[B
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator.salt:[B
            arraylength
            invokeinterface org.bouncycastle.crypto.Digest.update:([BII)V
         5: .line 57
            aload 0 /* this */
            getfield org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator.digest:Lorg/bouncycastle/crypto/Digest;
            aload 2 /* buf */
            iconst_0
            invokeinterface org.bouncycastle.crypto.Digest.doFinal:([BI)I
            pop
         6: .line 59
            iload 1 /* bytesNeeded */
            aload 2 /* buf */
            arraylength
            if_icmple 7
            aload 2 /* buf */
            arraylength
            goto 8
      StackMap locals:
      StackMap stack:
         7: iload 1 /* bytesNeeded */
      StackMap locals:
      StackMap stack: int
         8: istore 5 /* len */
        start local 5 // int len
         9: .line 60
            aload 2 /* buf */
            iconst_0
            aload 3 /* key */
            iload 4 /* offset */
            iload 5 /* len */
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
        10: .line 61
            iload 4 /* offset */
            iload 5 /* len */
            iadd
            istore 4 /* offset */
        11: .line 64
            iload 1 /* bytesNeeded */
            iload 5 /* len */
            isub
            istore 1 /* bytesNeeded */
        12: .line 65
            iload 1 /* bytesNeeded */
            ifne 14
        13: .line 67
            goto 17
        14: .line 71
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator.digest:Lorg/bouncycastle/crypto/Digest;
            invokeinterface org.bouncycastle.crypto.Digest.reset:()V
        15: .line 72
            aload 0 /* this */
            getfield org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator.digest:Lorg/bouncycastle/crypto/Digest;
            aload 2 /* buf */
            iconst_0
            aload 2 /* buf */
            arraylength
            invokeinterface org.bouncycastle.crypto.Digest.update:([BII)V
        end local 5 // int len
        16: .line 52
            goto 3
        17: .line 75
      StackMap locals:
      StackMap stack:
            aload 3 /* key */
            areturn
        end local 4 // int offset
        end local 3 // byte[] key
        end local 2 // byte[] buf
        end local 1 // int bytesNeeded
        end local 0 // org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0   18     0         this  Lorg/bouncycastle/crypto/generators/OpenSSLPBEParametersGenerator;
            0   18     1  bytesNeeded  I
            1   18     2          buf  [B
            2   18     3          key  [B
            3   18     4       offset  I
            9   16     5          len  I
    MethodParameters:
             Name  Flags
      bytesNeeded  

  public org.bouncycastle.crypto.CipherParameters generateDerivedParameters(int);
    descriptor: (I)Lorg/bouncycastle/crypto/CipherParameters;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=3, args_size=2
        start local 0 // org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator this
        start local 1 // int keySize
         0: .line 89
            iload 1 /* keySize */
            bipush 8
            idiv
            istore 1 /* keySize */
         1: .line 91
            aload 0 /* this */
            iload 1 /* keySize */
            invokevirtual org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator.generateDerivedKey:(I)[B
            astore 2 /* dKey */
        start local 2 // byte[] dKey
         2: .line 93
            new org.bouncycastle.crypto.params.KeyParameter
            dup
            aload 2 /* dKey */
            iconst_0
            iload 1 /* keySize */
            invokespecial org.bouncycastle.crypto.params.KeyParameter.<init>:([BII)V
            areturn
        end local 2 // byte[] dKey
        end local 1 // int keySize
        end local 0 // org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    3     0     this  Lorg/bouncycastle/crypto/generators/OpenSSLPBEParametersGenerator;
            0    3     1  keySize  I
            2    3     2     dKey  [B
    MethodParameters:
         Name  Flags
      keySize  

  public org.bouncycastle.crypto.CipherParameters generateDerivedParameters(int, int);
    descriptor: (II)Lorg/bouncycastle/crypto/CipherParameters;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=7, locals=4, args_size=3
        start local 0 // org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator this
        start local 1 // int keySize
        start local 2 // int ivSize
         0: .line 110
            iload 1 /* keySize */
            bipush 8
            idiv
            istore 1 /* keySize */
         1: .line 111
            iload 2 /* ivSize */
            bipush 8
            idiv
            istore 2 /* ivSize */
         2: .line 113
            aload 0 /* this */
            iload 1 /* keySize */
            iload 2 /* ivSize */
            iadd
            invokevirtual org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator.generateDerivedKey:(I)[B
            astore 3 /* dKey */
        start local 3 // byte[] dKey
         3: .line 115
            new org.bouncycastle.crypto.params.ParametersWithIV
            dup
            new org.bouncycastle.crypto.params.KeyParameter
            dup
            aload 3 /* dKey */
            iconst_0
            iload 1 /* keySize */
            invokespecial org.bouncycastle.crypto.params.KeyParameter.<init>:([BII)V
            aload 3 /* dKey */
            iload 1 /* keySize */
            iload 2 /* ivSize */
            invokespecial org.bouncycastle.crypto.params.ParametersWithIV.<init>:(Lorg/bouncycastle/crypto/CipherParameters;[BII)V
            areturn
        end local 3 // byte[] dKey
        end local 2 // int ivSize
        end local 1 // int keySize
        end local 0 // org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    4     0     this  Lorg/bouncycastle/crypto/generators/OpenSSLPBEParametersGenerator;
            0    4     1  keySize  I
            0    4     2   ivSize  I
            3    4     3     dKey  [B
    MethodParameters:
         Name  Flags
      keySize  
      ivSize   

  public org.bouncycastle.crypto.CipherParameters generateDerivedMacParameters(int);
    descriptor: (I)Lorg/bouncycastle/crypto/CipherParameters;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator this
        start local 1 // int keySize
         0: .line 129
            aload 0 /* this */
            iload 1 /* keySize */
            invokevirtual org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator.generateDerivedParameters:(I)Lorg/bouncycastle/crypto/CipherParameters;
            areturn
        end local 1 // int keySize
        end local 0 // org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0     this  Lorg/bouncycastle/crypto/generators/OpenSSLPBEParametersGenerator;
            0    1     1  keySize  I
    MethodParameters:
         Name  Flags
      keySize  
}
SourceFile: "OpenSSLPBEParametersGenerator.java"