/// <summary>
/// Creates a new salted hash
/// </summary>
/// <param name="bytes">Text to hash</param>
/// <param name="salt">Salt to hash with</param>
/// <param name="type">Hash algorithm to use</param>
/// <param name="bitSize">[ONLY IN SHA3] SHA3 algorithm bit size</param>
public static byte[] Hash(byte[] bytes, byte[] salt, HashType type = HashType.SHA256, SHA3BitSize bitSize = SHA3BitSize._256)
{
return ComputeHash(bytes, salt, type, bitSize);
}
// Creates a hash
static byte[] ComputeHash(byte[] bytes, byte[] salt, HashType type, SHA3BitSize bitSize)
{
// Create a hash buffer with a salt
if(salt != null && salt.Length > 0) {
byte[] full = new byte[bytes.Length + salt.Length];
for(int i = 0; i < bytes.Length; i++)
full[i] = bytes[i];
for(int i = 0; i < salt.Length; i++)
full[bytes.Length + i] = salt[i];
bytes = full;
}
// Identify the hash algorithm type
HashAlgorithm crypt;
switch(type) {
case HashType.SHA1:
crypt = new SHA1Managed();
break;
case HashType.SHA256:
crypt = new SHA256Managed();
break;
case HashType.SHA512:
crypt = new SHA512Managed();
break;
case HashType.SHA3:
crypt = new SHA3.SHA3Managed((int)bitSize);
break;
case HashType.MD5:
crypt = new MD5CryptoServiceProvider();
break;
default:
throw new ArgumentException("Parameter invalid", "type");
}
return crypt.ComputeHash(bytes);
}
/// <summary>
/// Creates a new salted hash
/// </summary>
/// <param name="text">Text to hash</param>
/// <param name="salt">Salt to hash with</param>
/// <param name="e">Encoding to use</param>
/// <param name="type">Hash algorithm type</param>
/// <param name="bitSize">[ONLY IN SHA3] SHA3 algorithm bit size</param>
public static string Hash(string text, string salt, Encoding e, HashType type = HashType.SHA256, SHA3BitSize bitSize = SHA3BitSize._256)
{
if(string.IsNullOrEmpty(text))
throw new ArgumentException("The parameter is null or empty.", "text");
else if(e == null)
e = Encoding.Default;
// Create a hexadecimal hash as a string
var hash = ComputeHash(e.GetBytes(text), e.GetBytes(salt), type, bitSize);
var sb = new StringBuilder();
for(int i = 0; i < hash.Length; i++)
sb.Append(hash[i].ToString("X2"));
return sb.ToString();
}
