else if (ssa.equalsIgnoreCase(Registry.RSA_PSS_SIG)) { result = new RSAPSSSignature(); } else if (ssa.equalsIgnoreCase(Registry.RSA_PKCS1_V1_5_SIG)) { result = new RSAPKCS1V1_5Signature(); }
else if (ssa.startsWith(Registry.RSA_SIG_PREFIX)) result = RSASignatureFactory.getInstance(ssa);
  public static final ISignature getInstance(String ssa)  {    if (ssa == null)      {        return null;      }    ssa = ssa.trim();    ISignature result = null;    if (ssa.equalsIgnoreCase(Registry.DSA_SIG) || ssa.equals(Registry.DSS_SIG))      {        result = new DSSSignature();      }    else if (ssa.equalsIgnoreCase(Registry.RSA_PSS_SIG))      {        result = new RSAPSSSignature();      }    else if (ssa.equalsIgnoreCase(Registry.RSA_PKCS1_V1_5_SIG))      {        result = new RSAPKCS1V1_5Signature();      }    return result;  }