Add Prefix/Suffix Random Word salt position options, closes #38

Author: SecurityCze

Diceware.cs

@@ -294,6 +294,14 @@ private static void ApplySalt(string[] words, SaltType salt, IEnumerable<SaltSou
 
 					words[targetIndex] = $"{words[targetIndex]}{separator}{singleSalt}";
 					break;
+				case SaltType.SuffixToRandomWord:
+					int suffixToIndex = random.AtMost(words.Length - 1);
+					words[suffixToIndex] = $"{words[suffixToIndex]}{singleSalt}";
+					break;
+				case SaltType.PrefixToRandomWord:
+					int prefixToIndex = random.AtMost(words.Length - 1);
+					words[prefixToIndex] = $"{singleSalt}{words[prefixToIndex]}";
+					break;
 				default:
 					throw new ArgumentOutOfRangeException(nameof(salt));
 			}

SaltType.cs

@@ -36,5 +36,9 @@ public enum SaltType
 		BetweenOne,
 		[Description("Between each word")]
 		BetweenEach,
+		[Description("Prepend to the beginning of a random word")]
+		PrefixToRandomWord,
+		[Description("Appended to the end of a random word")]
+		SuffixToRandomWord,
 	}
 }