Cherry pick branch 'genexuslabs:feat/gamutils_isHexa' into beta

Author: sgrampone

dotnet/src/extensions/gam/src/DotNetFramework/GamUtils/GamUtilsEO.cs

@@ -102,6 +102,9 @@ public static string RandomUrlSafeCharacters(int length)
 		[SecuritySafeCritical]
 		public static string Base64ToHexa(string base64) { return Encoding.Base64ToHexa(base64);  }
 
+		[SecuritySafeCritical]
+		public static bool IsHexadecimal(string base64) { return Encoding.IsHexa(base64); }
+
 		//**PKCE**//
 
 		[SecuritySafeCritical]

dotnet/src/extensions/gam/src/DotNetFramework/GamUtils/Utils/Encoding.cs

@@ -85,6 +85,22 @@ internal static string Base64ToHexa(string base64)
 			}
 		}
 
+		[SecuritySafeCritical]
+		internal static bool IsHexa(string hexa)
+		{
+			logger.Debug("IsHexa");
+			try
+			{
+				Hex.Decode(hexa);
+			}
+			catch (Exception e)
+			{
+				logger.Error("IsHexa", e);
+				return false;
+			}
+			return true;
+		}
+
 
 	}
 }

dotnet/src/extensions/gam/test/DotNetFramework/GamTest/Utils/TestEncoding.cs

@@ -93,5 +93,22 @@ private static string B64ToHexa(string base64)
 			}
 		}
 
+		[Test]
+		public void IsHexa()
+		{
+			int i = 0;
+			do
+			{
+				string randomHexa = GamUtilsEO.RandomHexaBits(128);
+				bool hexa = GamUtilsEO.IsHexadecimal(randomHexa);
+				Assert.IsTrue(hexa, "IsHexa_true");
+
+				string randomAlphanumeric = GamUtilsEO.RandomAlphanumeric(128);
+				bool notHexa = GamUtilsEO.IsHexadecimal(randomAlphanumeric);
+				Assert.IsFalse(notHexa, "testIsHexa_false");
+				i++;
+			} while (i < 50);
+		}
+
 	}
 }