/// <summary>
/// Hash a string data with HMAC SHA256.
/// </summary>
/// <param name="data"> a string to be hashed </param>
/// <returns> a string of hash code </returns>
public static string HashWithSHA256(string data)
{
using (SHA256CryptoServiceProvider sha256 = new SHA256CryptoServiceProvider())
{
return(StringUtilityService.BytesToHexString(sha256.ComputeHash(Encoding.ASCII.GetBytes(data))));
}
}
/// <summary>
/// Hashes the string with SHA1.
/// </summary>
/// <param name="str">The input to be hashed </param>
/// <returns>Hex string of the hashed input</returns>
public static string HashWithSHA1(string str)
{
using (SHA1CryptoServiceProvider sha1 = new SHA1CryptoServiceProvider())
{
// Convert the str to ASCII byte array ->
// Compute the hashcode in byte array with the ASCII byte array ->
// Convert the hashcode byte array to a hex string
return(StringUtilityService.BytesToHexString(sha1.ComputeHash(Encoding.ASCII.GetBytes(str))));
}
}
/// <summary>
/// Hash a password with SHA3-256 KDF.
/// </summary>
/// <param name="password"> password to be hashed</param>
/// <param name="salt"> salt used for hashing </param>
/// <param name="iterations"> number of iterations </param>
/// <param name="hashLength"> the length of the output hashcode </param>
/// <returns> a string of derived key </returns>
public static string HashWithKDF(string password, byte[] salt, int iterations = Constants.DefaultHashIterations,
int hashLength = Constants.DefaultHashByteLength)
{
byte[] passwordBytes = StringUtilityService.HexStringToBytes(password);
Pkcs5S2ParametersGenerator pbkdf = new Pkcs5S2ParametersGenerator(new Sha3Digest());
pbkdf.Init(passwordBytes, salt, iterations);
KeyParameter derivedKey = pbkdf.GenerateDerivedMacParameters(hashLength * Constants.ByteLength) as KeyParameter;
return(StringUtilityService.BytesToHexString(derivedKey.GetKey()));
}
