http://www.bouncycastle.org/java.html: The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 to JDK 1.8. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.
  • The Legion of the Bouncy Castle Inc. 
public class org.bouncycastle.operator.jcajce.JcaAlgorithmParametersConverter
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.operator.jcajce.JcaAlgorithmParametersConverter
  super_class: java.lang.Object
{
  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.operator.jcajce.JcaAlgorithmParametersConverter this
         0: .line 24
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 26
            return
        end local 0 // org.bouncycastle.operator.jcajce.JcaAlgorithmParametersConverter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/bouncycastle/operator/jcajce/JcaAlgorithmParametersConverter;

  public org.bouncycastle.asn1.x509.AlgorithmIdentifier getAlgorithmIdentifier(org.bouncycastle.asn1.ASN1ObjectIdentifier, java.security.AlgorithmParameters);
    descriptor: (Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;Ljava/security/AlgorithmParameters;)Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=4, args_size=3
        start local 0 // org.bouncycastle.operator.jcajce.JcaAlgorithmParametersConverter this
        start local 1 // org.bouncycastle.asn1.ASN1ObjectIdentifier algId
        start local 2 // java.security.AlgorithmParameters parameters
         0: .line 33
            aload 2 /* parameters */
            invokevirtual java.security.AlgorithmParameters.getEncoded:()[B
            invokestatic org.bouncycastle.asn1.ASN1Primitive.fromByteArray:([B)Lorg/bouncycastle/asn1/ASN1Primitive;
            astore 3 /* params */
        start local 3 // org.bouncycastle.asn1.ASN1Encodable params
         1: .line 35
            new org.bouncycastle.asn1.x509.AlgorithmIdentifier
            dup
            aload 1 /* algId */
            aload 3 /* params */
            invokespecial org.bouncycastle.asn1.x509.AlgorithmIdentifier.<init>:(Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;Lorg/bouncycastle/asn1/ASN1Encodable;)V
         2: areturn
        end local 3 // org.bouncycastle.asn1.ASN1Encodable params
         3: .line 37
      StackMap locals:
      StackMap stack: java.io.IOException
            astore 3 /* e */
        start local 3 // java.io.IOException e
         4: .line 39
            new java.security.InvalidAlgorithmParameterException
            dup
            new java.lang.StringBuilder
            dup
            ldc "unable to encode parameters object: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 3 /* e */
            invokevirtual java.io.IOException.getMessage:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.security.InvalidAlgorithmParameterException.<init>:(Ljava/lang/String;)V
            athrow
        end local 3 // java.io.IOException e
        end local 2 // java.security.AlgorithmParameters parameters
        end local 1 // org.bouncycastle.asn1.ASN1ObjectIdentifier algId
        end local 0 // org.bouncycastle.operator.jcajce.JcaAlgorithmParametersConverter this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    5     0        this  Lorg/bouncycastle/operator/jcajce/JcaAlgorithmParametersConverter;
            0    5     1       algId  Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            0    5     2  parameters  Ljava/security/AlgorithmParameters;
            1    3     3      params  Lorg/bouncycastle/asn1/ASN1Encodable;
            4    5     3           e  Ljava/io/IOException;
      Exception table:
        from    to  target  type
           0     2       3  Class java.io.IOException
    Exceptions:
      throws java.security.InvalidAlgorithmParameterException
    MethodParameters:
            Name  Flags
      algId       
      parameters  

  public org.bouncycastle.asn1.x509.AlgorithmIdentifier getAlgorithmIdentifier(org.bouncycastle.asn1.ASN1ObjectIdentifier, java.security.spec.AlgorithmParameterSpec);
    descriptor: (Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;Ljava/security/spec/AlgorithmParameterSpec;)Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=13, locals=7, args_size=3
        start local 0 // org.bouncycastle.operator.jcajce.JcaAlgorithmParametersConverter this
        start local 1 // org.bouncycastle.asn1.ASN1ObjectIdentifier algorithm
        start local 2 // java.security.spec.AlgorithmParameterSpec algorithmSpec
         0: .line 46
            aload 2 /* algorithmSpec */
            instanceof javax.crypto.spec.OAEPParameterSpec
            ifeq 16
         1: .line 48
            aload 2 /* algorithmSpec */
            getstatic javax.crypto.spec.OAEPParameterSpec.DEFAULT:Ljavax/crypto/spec/OAEPParameterSpec;
            invokevirtual java.lang.Object.equals:(Ljava/lang/Object;)Z
            ifeq 5
         2: .line 50
            new org.bouncycastle.asn1.x509.AlgorithmIdentifier
            dup
            aload 1 /* algorithm */
         3: .line 51
            new org.bouncycastle.asn1.pkcs.RSAESOAEPparams
            dup
            getstatic org.bouncycastle.asn1.pkcs.RSAESOAEPparams.DEFAULT_HASH_ALGORITHM:Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            getstatic org.bouncycastle.asn1.pkcs.RSAESOAEPparams.DEFAULT_MASK_GEN_FUNCTION:Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            getstatic org.bouncycastle.asn1.pkcs.RSAESOAEPparams.DEFAULT_P_SOURCE_ALGORITHM:Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            invokespecial org.bouncycastle.asn1.pkcs.RSAESOAEPparams.<init>:(Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;)V
         4: .line 50
            invokespecial org.bouncycastle.asn1.x509.AlgorithmIdentifier.<init>:(Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;Lorg/bouncycastle/asn1/ASN1Encodable;)V
            areturn
         5: .line 55
      StackMap locals:
      StackMap stack:
            aload 2 /* algorithmSpec */
            checkcast javax.crypto.spec.OAEPParameterSpec
            astore 3 /* oaepSpec */
        start local 3 // javax.crypto.spec.OAEPParameterSpec oaepSpec
         6: .line 56
            aload 3 /* oaepSpec */
            invokevirtual javax.crypto.spec.OAEPParameterSpec.getPSource:()Ljavax/crypto/spec/PSource;
            astore 4 /* pSource */
        start local 4 // javax.crypto.spec.PSource pSource
         7: .line 58
            aload 3 /* oaepSpec */
            invokevirtual javax.crypto.spec.OAEPParameterSpec.getMGFAlgorithm:()Ljava/lang/String;
            getstatic javax.crypto.spec.OAEPParameterSpec.DEFAULT:Ljavax/crypto/spec/OAEPParameterSpec;
            invokevirtual javax.crypto.spec.OAEPParameterSpec.getMGFAlgorithm:()Ljava/lang/String;
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifne 9
         8: .line 60
            new java.security.InvalidAlgorithmParameterException
            dup
            new java.lang.StringBuilder
            dup
            ldc "only "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            getstatic javax.crypto.spec.OAEPParameterSpec.DEFAULT:Ljavax/crypto/spec/OAEPParameterSpec;
            invokevirtual javax.crypto.spec.OAEPParameterSpec.getMGFAlgorithm:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc " mask generator supported."
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.security.InvalidAlgorithmParameterException.<init>:(Ljava/lang/String;)V
            athrow
         9: .line 63
      StackMap locals: javax.crypto.spec.OAEPParameterSpec javax.crypto.spec.PSource
      StackMap stack:
            new org.bouncycastle.operator.DefaultDigestAlgorithmIdentifierFinder
            dup
            invokespecial org.bouncycastle.operator.DefaultDigestAlgorithmIdentifierFinder.<init>:()V
            aload 3 /* oaepSpec */
            invokevirtual javax.crypto.spec.OAEPParameterSpec.getDigestAlgorithm:()Ljava/lang/String;
            invokevirtual org.bouncycastle.operator.DefaultDigestAlgorithmIdentifierFinder.find:(Ljava/lang/String;)Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            astore 5 /* hashAlgorithm */
        start local 5 // org.bouncycastle.asn1.x509.AlgorithmIdentifier hashAlgorithm
        10: .line 64
            new org.bouncycastle.operator.DefaultDigestAlgorithmIdentifierFinder
            dup
            invokespecial org.bouncycastle.operator.DefaultDigestAlgorithmIdentifierFinder.<init>:()V
            aload 3 /* oaepSpec */
            invokevirtual javax.crypto.spec.OAEPParameterSpec.getMGFParameters:()Ljava/security/spec/AlgorithmParameterSpec;
            checkcast java.security.spec.MGF1ParameterSpec
            invokevirtual java.security.spec.MGF1ParameterSpec.getDigestAlgorithm:()Ljava/lang/String;
            invokevirtual org.bouncycastle.operator.DefaultDigestAlgorithmIdentifierFinder.find:(Ljava/lang/String;)Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            astore 6 /* mgf1HashAlgorithm */
        start local 6 // org.bouncycastle.asn1.x509.AlgorithmIdentifier mgf1HashAlgorithm
        11: .line 65
            new org.bouncycastle.asn1.x509.AlgorithmIdentifier
            dup
            aload 1 /* algorithm */
        12: .line 66
            new org.bouncycastle.asn1.pkcs.RSAESOAEPparams
            dup
            aload 5 /* hashAlgorithm */
            new org.bouncycastle.asn1.x509.AlgorithmIdentifier
            dup
            getstatic org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers.id_mgf1:Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            aload 6 /* mgf1HashAlgorithm */
            invokespecial org.bouncycastle.asn1.x509.AlgorithmIdentifier.<init>:(Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;Lorg/bouncycastle/asn1/ASN1Encodable;)V
        13: .line 67
            new org.bouncycastle.asn1.x509.AlgorithmIdentifier
            dup
            getstatic org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers.id_pSpecified:Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            new org.bouncycastle.asn1.DEROctetString
            dup
            aload 4 /* pSource */
            checkcast javax.crypto.spec.PSource$PSpecified
            invokevirtual javax.crypto.spec.PSource$PSpecified.getValue:()[B
            invokespecial org.bouncycastle.asn1.DEROctetString.<init>:([B)V
            invokespecial org.bouncycastle.asn1.x509.AlgorithmIdentifier.<init>:(Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;Lorg/bouncycastle/asn1/ASN1Encodable;)V
        14: .line 66
            invokespecial org.bouncycastle.asn1.pkcs.RSAESOAEPparams.<init>:(Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;)V
        15: .line 65
            invokespecial org.bouncycastle.asn1.x509.AlgorithmIdentifier.<init>:(Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;Lorg/bouncycastle/asn1/ASN1Encodable;)V
            areturn
        end local 6 // org.bouncycastle.asn1.x509.AlgorithmIdentifier mgf1HashAlgorithm
        end local 5 // org.bouncycastle.asn1.x509.AlgorithmIdentifier hashAlgorithm
        end local 4 // javax.crypto.spec.PSource pSource
        end local 3 // javax.crypto.spec.OAEPParameterSpec oaepSpec
        16: .line 71
      StackMap locals:
      StackMap stack:
            new java.security.InvalidAlgorithmParameterException
            dup
            ldc "unknown parameter spec passed."
            invokespecial java.security.InvalidAlgorithmParameterException.<init>:(Ljava/lang/String;)V
            athrow
        end local 2 // java.security.spec.AlgorithmParameterSpec algorithmSpec
        end local 1 // org.bouncycastle.asn1.ASN1ObjectIdentifier algorithm
        end local 0 // org.bouncycastle.operator.jcajce.JcaAlgorithmParametersConverter this
      LocalVariableTable:
        Start  End  Slot               Name  Signature
            0   17     0               this  Lorg/bouncycastle/operator/jcajce/JcaAlgorithmParametersConverter;
            0   17     1          algorithm  Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            0   17     2      algorithmSpec  Ljava/security/spec/AlgorithmParameterSpec;
            6   16     3           oaepSpec  Ljavax/crypto/spec/OAEPParameterSpec;
            7   16     4            pSource  Ljavax/crypto/spec/PSource;
           10   16     5      hashAlgorithm  Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
           11   16     6  mgf1HashAlgorithm  Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
    Exceptions:
      throws java.security.InvalidAlgorithmParameterException
    MethodParameters:
               Name  Flags
      algorithm      
      algorithmSpec  
}
SourceFile: "JcaAlgorithmParametersConverter.java"
InnerClasses:
  public final PSpecified = javax.crypto.spec.PSource$PSpecified of javax.crypto.spec.PSource