mcs/class/corlib/System.Security.Cryptography/DSA.cs

   1 //\r
   2 // System.Security.Cryptography DSA.cs\r
   3 //\r
   4 // Author:\r
   5 //   Thomas Neidhart (tome@sbox.tugraz.at)\r
   6 //\r
   7 \r
   8 using System;\r
   9 using System.Text;\r
  10 \r
  11 namespace System.Security.Cryptography\r
  12 {\r
  13 \r
  14         /// <summary>\r
  15         /// Abstract base class for all implementations of the DSA algorithm\r
  16         /// </summary>\r
  17         public abstract class DSA : AsymmetricAlgorithm\r
  18         {\r
  19         \r
  20                 public static new DSA Create()\r
  21                 {\r
  22                         return new DSACryptoServiceProvider();\r
  23                 }\r
  24 \r
  25                 [MonoTODO]\r
  26                 public static new DSA Create(string algName)\r
  27                 {\r
  28                         // TODO: implement\r
  29                         return null;\r
  30                 }\r
  31                 \r
  32                 public abstract byte[] CreateSignature(byte[] rgbHash);\r
  33                 \r
  34                 public abstract DSAParameters ExportParameters(bool includePrivateParameters);\r
  35 \r
  36                 [MonoTODO]\r
  37                 public override void FromXmlString(string xmlString) \r
  38                 {\r
  39                         if (xmlString == null)\r
  40                                 throw new ArgumentNullException();\r
  41                         \r
  42                         // TODO: implement\r
  43                 }\r
  44                 \r
  45                 public abstract void ImportParameters(DSAParameters parameters);\r
  46 \r
  47                 public override string ToXmlString(bool includePrivateParameters)\r
  48                 {\r
  49                         DSAParameters dsaParams = ExportParameters(includePrivateParameters);\r
  50                         \r
  51                         StringBuilder sb = new StringBuilder();\r
  52                         \r
  53                         sb.Append("<DSAKeyValue>");\r
  54                         \r
  55                         sb.Append("<P>");\r
  56                         sb.Append(Convert.ToBase64String(dsaParams.P));\r
  57                         sb.Append("</P>");\r
  58                         \r
  59                         sb.Append("<Q>");\r
  60                         sb.Append(Convert.ToBase64String(dsaParams.Q));\r
  61                         sb.Append("</Q>");\r
  62 \r
  63                         sb.Append("<G>");\r
  64                         sb.Append(Convert.ToBase64String(dsaParams.G));\r
  65                         sb.Append("</G>");\r
  66 \r
  67                         sb.Append("<Y>");\r
  68                         sb.Append(Convert.ToBase64String(dsaParams.Y));\r
  69                         sb.Append("</Y>");\r
  70 \r
  71                         sb.Append("<J>");\r
  72                         sb.Append(Convert.ToBase64String(dsaParams.J));\r
  73                         sb.Append("</J>");\r
  74                         \r
  75                         sb.Append("<Seed>");\r
  76                         sb.Append(Convert.ToBase64String(dsaParams.Seed));\r
  77                         sb.Append("</Seed>");\r
  78                         \r
  79                         sb.Append("<PgenCounter>");\r
  80                         string cnt = Convert.ToString(dsaParams.Counter);\r
  81                         byte[] inArr = new ASCIIEncoding().GetBytes(cnt);\r
  82                         sb.Append(Convert.ToBase64String(inArr));\r
  83                         sb.Append("</PgenCounter>");\r
  84 \r
  85                         if (dsaParams.X != null)  {\r
  86                                 sb.Append("<X>");\r
  87                                 sb.Append(Convert.ToBase64String(dsaParams.X));\r
  88                                 sb.Append("</X>");\r
  89                         }\r
  90 \r
  91                         sb.Append("</DSAKeyValue>");\r
  92                         \r
  93                         return sb.ToString();\r
  94                 }\r
  95                 \r
  96                 public abstract bool VerifySignature(byte[] rgbHash, byte[] rgbSignature);\r
  97                 \r
  98         } // DSA\r
  99         \r
 100 } // System.Security.Cryptography\r