/// <summary>
/// Get the hashcode from the file.
/// </summary>
/// <param name="filename">The path and file name to generate the hash code for.</param>
/// <param name="hashcodeType">The hash name.</param>
/// <returns>The generated hash code.</returns>
public static string GetHashcodeFile(string filename, Nequeo.Cryptography.HashcodeType hashcodeType)
{
FileStream file = null;
byte[] hashValue = null;
StringBuilder sb = null;
try
{
// Open the file to generate the hash code for.
using (file = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
// Select the hash code type.
switch (hashcodeType)
{
case HashcodeType.MD5:
// MD5 hashcode.
MD5 md5 = new MD5CryptoServiceProvider();
hashValue = md5.ComputeHash(file);
break;
case HashcodeType.SHA1:
// SHA1 hashcode.
SHA1 sha1 = new SHA1CryptoServiceProvider();
hashValue = sha1.ComputeHash(file);
break;
case HashcodeType.SHA256:
// SHA256 hashcode.
SHA256 sha256 = new SHA256CryptoServiceProvider();
hashValue = sha256.ComputeHash(file);
break;
case HashcodeType.SHA384:
// SHA384 hashcode.
SHA384 sha384 = new SHA384CryptoServiceProvider();
hashValue = sha384.ComputeHash(file);
break;
case HashcodeType.SHA512:
// SHA512 hashcode.
SHA512 sha512 = new SHA512CryptoServiceProvider();
hashValue = sha512.ComputeHash(file);
break;
case HashcodeType.SHA3:
// SHA3 hashcode.
Sha3.SHA3Managed sha3 = new Sha3.SHA3Managed();
hashValue = sha3.ComputeHash(file);
break;
case HashcodeType.PBKDF2:
throw new Exception("PBKDF2 Hashing is not supported.");
}
// Close the file.
file.Close();
// Get the hashcode bytes as hex-string.
sb = new StringBuilder();
for (int i = 0; i < hashValue.Length; i++)
{
sb.Append(hashValue[i].ToString("X2"));
}
// Return the hash code.
return(sb.ToString());
}
}
catch (Exception)
{
throw;
}
finally
{
// Clean-up
if (file != null)
{
file.Close();
}
}
}