/// <summary>
/// Encode string to hash string.
/// </summary>
/// <param name="hashName">Hash name</param>
/// <param name="config">Optional <see cref="IBitConfiguration" /> instance</param>
/// <returns>Hash string</returns>
/// <exception cref="ArgumentNullException" />If <param name="hashName" /> is null or empty</exception>
/// <exception cref="NotSupportedException" />If <param name="hashName" /> is invalid.</exception>
internal static string ToHash(this string _this, string hashName, IBitConfiguration config = null)
{
if (string.IsNullOrWhiteSpace(_this))
{
return(null);
}
if (string.IsNullOrEmpty(hashName))
{
throw new ArgumentNullException(nameof(hashName));
}
var validNames = new string[] {
HASH_NAME_SHA1,
HASH_NAME_SHA256,
HASH_NAME_SHA384,
HASH_NAME_SHA512,
HASH_NAME_MD5
};
if (Array.IndexOf(validNames, hashName.ToUpperInvariant()) < 0)
{
throw new NotSupportedException(string.Format("Not supported hash lgoritm: {0}.", hashName));
}
Encoding encoding = config?.DefaultEncoding ?? Encoding.Unicode;
return(((HashAlgorithm)CryptoConfig.CreateFromName(hashName))
.ComputeHash(encoding.GetBytes(_this))
.ToHexadecimalString());
}
/// <summary>
/// Encode string to Base64.
/// </summary>
/// <param name="config">Optional <see cref="IBitConfiguration" /> instance</param>
/// <returns>Base64 encoded string or <see cref="null" /></returns>
public static string ToBase64(this string _this, IBitConfiguration config = null)
{
if (string.IsNullOrWhiteSpace(_this))
{
return(null);
}
Encoding encoding = config?.DefaultEncoding ?? Encoding.Unicode;
return(Convert.ToBase64String(encoding.GetBytes(_this)));
}
/// <summary>
/// Dencode string from Base64.
/// </summary>
/// <param name="config">Optional <see cref="IBitConfiguration" /> instance</param>
/// <returns>String value or <see cref="null" /></returns>
public static string FromBase64(this string _this, IBitConfiguration config = null)
{
if (string.IsNullOrWhiteSpace(_this))
{
return(null);
}
if (!IsBase64String(_this))
{
throw new FormatException("Invalid Base64 string");
}
Encoding encoding = config?.DefaultEncoding ?? Encoding.Unicode;
return(encoding.GetString(Convert.FromBase64String(_this)));
}
/// <summary> /// Checks raw string combination with MD5 hash. /// </summary> /// <param name="hashValue">Hash value o compare</param> /// <param name="config">Optional <see cref="IBitConfiguration" /> instance</param> /// <returns><see cref="true" /> if combine, and <see cref="false" /> if not combine or raw string is null or empty.</returns> /// <exception cref="ArgumentNullException" />If <param name="hashName" /> is null or empty</exception> /// <exception cref="NotSupportedException" />If <param name="hashName" /> is invalid.</exception> public static bool Md5Check(this string _this, string hashValue, IBitConfiguration config = null) => CheckHash(_this, hashValue, HASH_NAME_MD5, config);
/// <summary> /// Checks raw string combination with SHA512 hash. /// </summary> /// <param name="hashValue">Hash value o compare</param> /// <param name="config">Optional <see cref="IBitConfiguration" /> instance</param> /// <returns><see cref="true" /> if combine, and <see cref="false" /> if not combine or raw string is null or empty.</returns> /// <exception cref="ArgumentNullException" />If <param name="hashName" /> is null or empty</exception> /// <exception cref="NotSupportedException" />If <param name="hashName" /> is invalid.</exception> public static bool Sha512Check(this string _this, string hashValue, IBitConfiguration config = null) => CheckHash(_this, hashValue, HASH_NAME_SHA512, config);
/// <summary>
/// Checks raw string combination with hash.
/// </summary>
/// <param name="hashValue">Hash value o compare</param>
/// <param name="hashName">Hash name</param>
/// <param name="config">Optional <see cref="IBitConfiguration" /> instance</param>
/// <returns><see cref="true" /> if combine, and <see cref="false" /> if not combine or raw string is null or empty.</returns>
/// <exception cref="ArgumentNullException" />If <param name="hashName" /> is null or empty</exception>
/// <exception cref="NotSupportedException" />If <param name="hashName" /> is invalid.</exception>
public static bool CheckHash(this string _this, string hashValue, string hashName, IBitConfiguration config = null)
{
if (string.IsNullOrWhiteSpace(_this))
{
return(false);
}
if (string.IsNullOrEmpty(hashName))
{
throw new ArgumentNullException(nameof(hashName));
}
string computedHash = _this.ToHash(hashName, config);
return(string.Compare(computedHash, hashValue, StringComparison.OrdinalIgnoreCase) == 0);
}
/// <summary> /// Encode string to MD5 hash string. /// </summary> /// <param name="config">Optional <see cref="IBitConfiguration" /> instance</param> /// <returns>Hash string</returns> /// <exception cref="ArgumentNullException" />If <param name="hashName" /> is null or empty</exception> /// <exception cref="NotSupportedException" />If <param name="hashName" /> is invalid.</exception> public static string Md5(this string _this, IBitConfiguration config = null) => ToHash(_this, HASH_NAME_MD5, config);
/// <summary> /// Encode string to SHA512 hash string. /// </summary> /// <param name="config">Optional <see cref="IBitConfiguration" /> instance</param> /// <returns>Hash string</returns> /// <exception cref="ArgumentNullException" />If <param name="hashName" /> is null or empty</exception> /// <exception cref="NotSupportedException" />If <param name="hashName" /> is invalid.</exception> public static string Sha512(this string _this, IBitConfiguration config = null) => ToHash(_this, HASH_NAME_SHA512, config);
