Created
November 25, 2020 03:35
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Binary helper C#
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| using System; | |
| using System.Text; | |
| using System.Text.RegularExpressions; | |
| namespace CryptoLib | |
| { | |
| public class BinaryHelper | |
| { | |
| public static string ToBase64UrlString(byte[] payload) | |
| { | |
| char[] padding = { '=' }; | |
| string returnValue = Convert.ToBase64String(payload) | |
| //.TrimEnd(padding) | |
| .Replace('+', '-') | |
| .Replace('/', '_'); | |
| return returnValue; | |
| } | |
| public static byte[] FromBase64UrlString(string b64Payload) | |
| { | |
| string incoming = b64Payload | |
| .Replace('_', '/').Replace('-', '+'); | |
| switch (b64Payload.Length % 4) | |
| { | |
| case 2: incoming += "=="; break; | |
| case 3: incoming += "="; break; | |
| } | |
| byte[] bytes = Convert.FromBase64String(incoming); | |
| return bytes; | |
| } | |
| public static string HexStringToAsciiString(String hex) | |
| { | |
| return Encoding.ASCII.GetString(HexStringToByteArray(hex)); | |
| } | |
| public static byte[] HexStringToByteArray(String hex) | |
| { | |
| hex = Regex.Replace(hex, " ", ""); | |
| int numberChars = hex.Length; | |
| if(numberChars%2!=0) | |
| throw new InvalidOperationException("must have even number of hexadecimal characters"); | |
| byte[] bytes = new byte[numberChars / 2]; | |
| for (int i = 0; i < numberChars; i += 2) | |
| bytes[i / 2] = Convert.ToByte(hex.Substring(i, 2), 16); | |
| return bytes; | |
| } | |
| public static string ByteArrayToHexString(byte[] ba, bool useUppercase=false) | |
| { | |
| var format=useUppercase? "{0:X2}": "{0:x2}"; | |
| StringBuilder hex = new StringBuilder(ba.Length * 2); | |
| foreach (byte b in ba) | |
| hex.AppendFormat(format, b); | |
| return hex.ToString(); | |
| } | |
| public static string AsciiStringToHexString(String ascii) | |
| { | |
| return ByteArrayToHexString(Encoding.ASCII.GetBytes(ascii)); | |
| } | |
| } | |
| } |
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