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using System.Security.Cryptography;
using System.Text;
namespace Snippets
{
public static class SHA1Util
{
/// <summary>
/// Compute hash for string encoded as UTF8
/// </summary>
/// <param name="s">String to be hashed</param>
/// <returns>40-character hex string</returns>
pubilc static string SHA1HashStringForUTF8String(string s)
{
byte[] bytes = Encoding.UTF8.GetBytes(s);
var sha1 = SHA1.Create();
byte[] hashBytes = sha1.ComputeHash(bytes);
return HexStringFromBytes(hashBytes);
}
/// <summary>
/// Convert an array of bytes to a string of hex digits
/// </summary>
/// <param name="bytes">array of bytes</param>
/// <returns>String of hex digits</returns>
public static string HexStringFromBytes(byte[] bytes)
{
var sb = new StringBuilder();
foreach (byte b in bytes)
{
var hex = b.ToString("x2");
sb.Append(hex);
}
return sb.ToString();
}
}
}
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