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Calculates the SHA1 hash value of a string and returns it as a base64 string.


/// <summary>
/// Calculates the SHA1 hash of the supplied string and returns a base 64 string.
/// </summary>
/// <param name="stringToHash">String that must be hashed.</param>
/// <returns>The hashed string or null if hashing failed.</returns>
/// <exception cref="ArgumentException">Occurs when stringToHash or key is null or empty.</exception>
public static string GetSHA1Hash(this string stringToHash)
    if (string.IsNullOrEmpty(stringToHash))
        throw new ArgumentException("An empty string value cannot be hashed.");

    Byte[] data = System.Text.Encoding.UTF8.GetBytes(stringToHash);
    Byte[] hash = new SHA1CryptoServiceProvider().ComputeHash(data);
    return Convert.ToBase64String(hash);


"Get the hash of this string".GetSHA1Hash()

Author: Steve Hiner

Submitted on: 6 jan 2009

Language: C#

Type: System.String

Views: 6091