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. 
class org.bouncycastle.crypto.util.PublicKeyFactory$DSTUConverter extends org.bouncycastle.crypto.util.PublicKeyFactory$SubjectPublicKeyInfoConverter
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.bouncycastle.crypto.util.PublicKeyFactory$DSTUConverter
  super_class: org.bouncycastle.crypto.util.PublicKeyFactory$SubjectPublicKeyInfoConverter
{
  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.crypto.util.PublicKeyFactory$DSTUConverter this
         0: .line 420
            aload 0 /* this */
            invokespecial org.bouncycastle.crypto.util.PublicKeyFactory$SubjectPublicKeyInfoConverter.<init>:()V
            return
        end local 0 // org.bouncycastle.crypto.util.PublicKeyFactory$DSTUConverter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/crypto/util/PublicKeyFactory$DSTUConverter;

  org.bouncycastle.crypto.params.AsymmetricKeyParameter getPublicKeyParameters(org.bouncycastle.asn1.x509.SubjectPublicKeyInfo, java.lang.Object);
    descriptor: (Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;Ljava/lang/Object;)Lorg/bouncycastle/crypto/params/AsymmetricKeyParameter;
    flags: (0x0000) 
    Code:
      stack=11, locals=13, args_size=3
        start local 0 // org.bouncycastle.crypto.util.PublicKeyFactory$DSTUConverter this
        start local 1 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo keyInfo
        start local 2 // java.lang.Object defaultParams
         0: .line 426
            aload 1 /* keyInfo */
            invokevirtual org.bouncycastle.asn1.x509.SubjectPublicKeyInfo.getPublicKeyData:()Lorg/bouncycastle/asn1/DERBitString;
            astore 3 /* bits */
        start local 3 // org.bouncycastle.asn1.DERBitString bits
         1: .line 431
            aload 3 /* bits */
            invokevirtual org.bouncycastle.asn1.DERBitString.getBytes:()[B
            invokestatic org.bouncycastle.asn1.ASN1Primitive.fromByteArray:([B)Lorg/bouncycastle/asn1/ASN1Primitive;
            checkcast org.bouncycastle.asn1.ASN1OctetString
            astore 4 /* key */
        start local 4 // org.bouncycastle.asn1.ASN1OctetString key
         2: .line 432
            goto 5
        end local 4 // org.bouncycastle.asn1.ASN1OctetString key
         3: .line 433
      StackMap locals: org.bouncycastle.crypto.util.PublicKeyFactory$DSTUConverter org.bouncycastle.asn1.x509.SubjectPublicKeyInfo java.lang.Object org.bouncycastle.asn1.DERBitString
      StackMap stack: java.io.IOException
            pop
         4: .line 435
            new java.lang.IllegalArgumentException
            dup
            ldc "error recovering public key"
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
        start local 4 // org.bouncycastle.asn1.ASN1OctetString key
         5: .line 438
      StackMap locals: org.bouncycastle.asn1.ASN1OctetString
      StackMap stack:
            aload 4 /* key */
            invokevirtual org.bouncycastle.asn1.ASN1OctetString.getOctets:()[B
            astore 5 /* keyEnc */
        start local 5 // byte[] keyEnc
         6: .line 440
            aload 1 /* keyInfo */
            invokevirtual org.bouncycastle.asn1.x509.SubjectPublicKeyInfo.getAlgorithm:()Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            invokevirtual org.bouncycastle.asn1.x509.AlgorithmIdentifier.getAlgorithm:()Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            getstatic org.bouncycastle.asn1.ua.UAObjectIdentifiers.dstu4145le:Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            invokevirtual org.bouncycastle.asn1.ASN1ObjectIdentifier.equals:(Ljava/lang/Object;)Z
            ifeq 8
         7: .line 442
            aload 0 /* this */
            aload 5 /* keyEnc */
            invokevirtual org.bouncycastle.crypto.util.PublicKeyFactory$DSTUConverter.reverseBytes:([B)V
         8: .line 445
      StackMap locals: byte[]
      StackMap stack:
            aload 1 /* keyInfo */
            invokevirtual org.bouncycastle.asn1.x509.SubjectPublicKeyInfo.getAlgorithm:()Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            invokevirtual org.bouncycastle.asn1.x509.AlgorithmIdentifier.getParameters:()Lorg/bouncycastle/asn1/ASN1Encodable;
            invokestatic org.bouncycastle.asn1.ua.DSTU4145Params.getInstance:(Ljava/lang/Object;)Lorg/bouncycastle/asn1/ua/DSTU4145Params;
            astore 6 /* dstuParams */
        start local 6 // org.bouncycastle.asn1.ua.DSTU4145Params dstuParams
         9: .line 448
            aload 6 /* dstuParams */
            invokevirtual org.bouncycastle.asn1.ua.DSTU4145Params.isNamedCurve:()Z
            ifeq 13
        10: .line 450
            aload 6 /* dstuParams */
            invokevirtual org.bouncycastle.asn1.ua.DSTU4145Params.getNamedCurve:()Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            astore 8 /* curveOid */
        start local 8 // org.bouncycastle.asn1.ASN1ObjectIdentifier curveOid
        11: .line 452
            aload 8 /* curveOid */
            invokestatic org.bouncycastle.asn1.ua.DSTU4145NamedCurves.getByOID:(Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;)Lorg/bouncycastle/crypto/params/ECDomainParameters;
            astore 7 /* ecDomain */
        end local 8 // org.bouncycastle.asn1.ASN1ObjectIdentifier curveOid
        start local 7 // org.bouncycastle.crypto.params.ECDomainParameters ecDomain
        12: .line 453
            goto 23
        end local 7 // org.bouncycastle.crypto.params.ECDomainParameters ecDomain
        13: .line 456
      StackMap locals: org.bouncycastle.asn1.ua.DSTU4145Params
      StackMap stack:
            aload 6 /* dstuParams */
            invokevirtual org.bouncycastle.asn1.ua.DSTU4145Params.getECBinary:()Lorg/bouncycastle/asn1/ua/DSTU4145ECBinary;
            astore 8 /* binary */
        start local 8 // org.bouncycastle.asn1.ua.DSTU4145ECBinary binary
        14: .line 457
            aload 8 /* binary */
            invokevirtual org.bouncycastle.asn1.ua.DSTU4145ECBinary.getB:()[B
            astore 9 /* b_bytes */
        start local 9 // byte[] b_bytes
        15: .line 458
            aload 1 /* keyInfo */
            invokevirtual org.bouncycastle.asn1.x509.SubjectPublicKeyInfo.getAlgorithm:()Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            invokevirtual org.bouncycastle.asn1.x509.AlgorithmIdentifier.getAlgorithm:()Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            getstatic org.bouncycastle.asn1.ua.UAObjectIdentifiers.dstu4145le:Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            invokevirtual org.bouncycastle.asn1.ASN1ObjectIdentifier.equals:(Ljava/lang/Object;)Z
            ifeq 17
        16: .line 460
            aload 0 /* this */
            aload 9 /* b_bytes */
            invokevirtual org.bouncycastle.crypto.util.PublicKeyFactory$DSTUConverter.reverseBytes:([B)V
        17: .line 462
      StackMap locals: org.bouncycastle.crypto.util.PublicKeyFactory$DSTUConverter org.bouncycastle.asn1.x509.SubjectPublicKeyInfo java.lang.Object org.bouncycastle.asn1.DERBitString org.bouncycastle.asn1.ASN1OctetString byte[] org.bouncycastle.asn1.ua.DSTU4145Params top org.bouncycastle.asn1.ua.DSTU4145ECBinary byte[]
      StackMap stack:
            aload 8 /* binary */
            invokevirtual org.bouncycastle.asn1.ua.DSTU4145ECBinary.getField:()Lorg/bouncycastle/asn1/ua/DSTU4145BinaryField;
            astore 10 /* field */
        start local 10 // org.bouncycastle.asn1.ua.DSTU4145BinaryField field
        18: .line 463
            new org.bouncycastle.math.ec.ECCurve$F2m
            dup
            aload 10 /* field */
            invokevirtual org.bouncycastle.asn1.ua.DSTU4145BinaryField.getM:()I
            aload 10 /* field */
            invokevirtual org.bouncycastle.asn1.ua.DSTU4145BinaryField.getK1:()I
            aload 10 /* field */
            invokevirtual org.bouncycastle.asn1.ua.DSTU4145BinaryField.getK2:()I
            aload 10 /* field */
            invokevirtual org.bouncycastle.asn1.ua.DSTU4145BinaryField.getK3:()I
            aload 8 /* binary */
            invokevirtual org.bouncycastle.asn1.ua.DSTU4145ECBinary.getA:()Ljava/math/BigInteger;
            new java.math.BigInteger
            dup
            iconst_1
            aload 9 /* b_bytes */
            invokespecial java.math.BigInteger.<init>:(I[B)V
            invokespecial org.bouncycastle.math.ec.ECCurve$F2m.<init>:(IIIILjava/math/BigInteger;Ljava/math/BigInteger;)V
            astore 11 /* curve */
        start local 11 // org.bouncycastle.math.ec.ECCurve curve
        19: .line 464
            aload 8 /* binary */
            invokevirtual org.bouncycastle.asn1.ua.DSTU4145ECBinary.getG:()[B
            astore 12 /* g_bytes */
        start local 12 // byte[] g_bytes
        20: .line 465
            aload 1 /* keyInfo */
            invokevirtual org.bouncycastle.asn1.x509.SubjectPublicKeyInfo.getAlgorithm:()Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            invokevirtual org.bouncycastle.asn1.x509.AlgorithmIdentifier.getAlgorithm:()Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            getstatic org.bouncycastle.asn1.ua.UAObjectIdentifiers.dstu4145le:Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            invokevirtual org.bouncycastle.asn1.ASN1ObjectIdentifier.equals:(Ljava/lang/Object;)Z
            ifeq 22
        21: .line 467
            aload 0 /* this */
            aload 12 /* g_bytes */
            invokevirtual org.bouncycastle.crypto.util.PublicKeyFactory$DSTUConverter.reverseBytes:([B)V
        22: .line 469
      StackMap locals: org.bouncycastle.asn1.ua.DSTU4145BinaryField org.bouncycastle.math.ec.ECCurve byte[]
      StackMap stack:
            new org.bouncycastle.crypto.params.ECDomainParameters
            dup
            aload 11 /* curve */
            aload 11 /* curve */
            aload 12 /* g_bytes */
            invokestatic org.bouncycastle.asn1.ua.DSTU4145PointEncoder.decodePoint:(Lorg/bouncycastle/math/ec/ECCurve;[B)Lorg/bouncycastle/math/ec/ECPoint;
            aload 8 /* binary */
            invokevirtual org.bouncycastle.asn1.ua.DSTU4145ECBinary.getN:()Ljava/math/BigInteger;
            invokespecial org.bouncycastle.crypto.params.ECDomainParameters.<init>:(Lorg/bouncycastle/math/ec/ECCurve;Lorg/bouncycastle/math/ec/ECPoint;Ljava/math/BigInteger;)V
            astore 7 /* ecDomain */
        end local 12 // byte[] g_bytes
        end local 11 // org.bouncycastle.math.ec.ECCurve curve
        end local 10 // org.bouncycastle.asn1.ua.DSTU4145BinaryField field
        end local 9 // byte[] b_bytes
        end local 8 // org.bouncycastle.asn1.ua.DSTU4145ECBinary binary
        start local 7 // org.bouncycastle.crypto.params.ECDomainParameters ecDomain
        23: .line 472
      StackMap locals: org.bouncycastle.crypto.util.PublicKeyFactory$DSTUConverter org.bouncycastle.asn1.x509.SubjectPublicKeyInfo java.lang.Object org.bouncycastle.asn1.DERBitString org.bouncycastle.asn1.ASN1OctetString byte[] org.bouncycastle.asn1.ua.DSTU4145Params org.bouncycastle.crypto.params.ECDomainParameters
      StackMap stack:
            new org.bouncycastle.crypto.params.ECPublicKeyParameters
            dup
            aload 7 /* ecDomain */
            invokevirtual org.bouncycastle.crypto.params.ECDomainParameters.getCurve:()Lorg/bouncycastle/math/ec/ECCurve;
            aload 5 /* keyEnc */
            invokestatic org.bouncycastle.asn1.ua.DSTU4145PointEncoder.decodePoint:(Lorg/bouncycastle/math/ec/ECCurve;[B)Lorg/bouncycastle/math/ec/ECPoint;
            aload 7 /* ecDomain */
            invokespecial org.bouncycastle.crypto.params.ECPublicKeyParameters.<init>:(Lorg/bouncycastle/math/ec/ECPoint;Lorg/bouncycastle/crypto/params/ECDomainParameters;)V
            areturn
        end local 7 // org.bouncycastle.crypto.params.ECDomainParameters ecDomain
        end local 6 // org.bouncycastle.asn1.ua.DSTU4145Params dstuParams
        end local 5 // byte[] keyEnc
        end local 4 // org.bouncycastle.asn1.ASN1OctetString key
        end local 3 // org.bouncycastle.asn1.DERBitString bits
        end local 2 // java.lang.Object defaultParams
        end local 1 // org.bouncycastle.asn1.x509.SubjectPublicKeyInfo keyInfo
        end local 0 // org.bouncycastle.crypto.util.PublicKeyFactory$DSTUConverter this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   24     0           this  Lorg/bouncycastle/crypto/util/PublicKeyFactory$DSTUConverter;
            0   24     1        keyInfo  Lorg/bouncycastle/asn1/x509/SubjectPublicKeyInfo;
            0   24     2  defaultParams  Ljava/lang/Object;
            1   24     3           bits  Lorg/bouncycastle/asn1/DERBitString;
            2    3     4            key  Lorg/bouncycastle/asn1/ASN1OctetString;
            5   24     4            key  Lorg/bouncycastle/asn1/ASN1OctetString;
            6   24     5         keyEnc  [B
            9   24     6     dstuParams  Lorg/bouncycastle/asn1/ua/DSTU4145Params;
           12   13     7       ecDomain  Lorg/bouncycastle/crypto/params/ECDomainParameters;
           23   24     7       ecDomain  Lorg/bouncycastle/crypto/params/ECDomainParameters;
           11   12     8       curveOid  Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
           14   23     8         binary  Lorg/bouncycastle/asn1/ua/DSTU4145ECBinary;
           15   23     9        b_bytes  [B
           18   23    10          field  Lorg/bouncycastle/asn1/ua/DSTU4145BinaryField;
           19   23    11          curve  Lorg/bouncycastle/math/ec/ECCurve;
           20   23    12        g_bytes  [B
      Exception table:
        from    to  target  type
           1     2       3  Class java.io.IOException
    Exceptions:
      throws java.io.IOException
    MethodParameters:
               Name  Flags
      keyInfo        
      defaultParams  

  private void reverseBytes(byte[]);
    descriptor: ([B)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=5, locals=4, args_size=2
        start local 0 // org.bouncycastle.crypto.util.PublicKeyFactory$DSTUConverter this
        start local 1 // byte[] bytes
         0: .line 479
            iconst_0
            istore 3 /* i */
        start local 3 // int i
         1: goto 6
         2: .line 481
      StackMap locals: org.bouncycastle.crypto.util.PublicKeyFactory$DSTUConverter byte[] top int
      StackMap stack:
            aload 1 /* bytes */
            iload 3 /* i */
            baload
            istore 2 /* tmp */
        start local 2 // byte tmp
         3: .line 482
            aload 1 /* bytes */
            iload 3 /* i */
            aload 1 /* bytes */
            aload 1 /* bytes */
            arraylength
            iconst_1
            isub
            iload 3 /* i */
            isub
            baload
            bastore
         4: .line 483
            aload 1 /* bytes */
            aload 1 /* bytes */
            arraylength
            iconst_1
            isub
            iload 3 /* i */
            isub
            iload 2 /* tmp */
            bastore
         5: .line 479
            iinc 3 /* i */ 1
        end local 2 // byte tmp
      StackMap locals:
      StackMap stack:
         6: iload 3 /* i */
            aload 1 /* bytes */
            arraylength
            iconst_2
            idiv
            if_icmplt 2
        end local 3 // int i
         7: .line 485
            return
        end local 1 // byte[] bytes
        end local 0 // org.bouncycastle.crypto.util.PublicKeyFactory$DSTUConverter this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    8     0   this  Lorg/bouncycastle/crypto/util/PublicKeyFactory$DSTUConverter;
            0    8     1  bytes  [B
            3    6     2    tmp  B
            1    7     3      i  I
    MethodParameters:
       Name  Flags
      bytes  
}
SourceFile: "PublicKeyFactory.java"
NestHost: org.bouncycastle.crypto.util.PublicKeyFactory
InnerClasses:
  private DSTUConverter = org.bouncycastle.crypto.util.PublicKeyFactory$DSTUConverter of org.bouncycastle.crypto.util.PublicKeyFactory
  private abstract SubjectPublicKeyInfoConverter = org.bouncycastle.crypto.util.PublicKeyFactory$SubjectPublicKeyInfoConverter of org.bouncycastle.crypto.util.PublicKeyFactory
  public F2m = org.bouncycastle.math.ec.ECCurve$F2m of org.bouncycastle.math.ec.ECCurve