C# MD5 and SHA encryption wrapper class
January 14, 2009
This is a simple utility class for MD5 (128bit) or SHA-2 (256bit,384bit and 512bit) hash encryption.
It outputs the string using 2 byte hex values, e.g. AB12FE. It doesn’t include SHA-1 but that’s trivial to add.
| public class HashEncryption | |
| { | |
| /// <summary> | |
| /// Encrypts a string using the MD5 hash encryption algorithm. | |
| /// Message Digest is 128-bit and is commonly used to verify data, by checking | |
| /// the 'MD5 checksum' of the data. Information on MD5 can be found at: | |
| /// | |
| /// http://www.faqs.org/rfcs/rfc1321.html | |
| /// </summary> | |
| /// <param name="Data">A string containing the data to encrypt.</param> | |
| /// <returns>A string containing the string, encrypted with the MD5 hash.</returns> | |
| public static string MD5Hash(string Data) | |
| { | |
| MD5 md5 = new MD5CryptoServiceProvider(); | |
| byte[] hash = md5.ComputeHash(Encoding.ASCII.GetBytes(Data)); | |
| StringBuilder stringBuilder = new StringBuilder(); | |
| foreach (byte b in hash) | |
| { | |
| stringBuilder.AppendFormat("{0:x2}", b); | |
| } | |
| return stringBuilder.ToString(); | |
| } | |
| /// <summary> | |
| /// Computes an MD5 hash for the provided file. | |
| /// </summary> | |
| /// <param name="filename">The full path to the file</param> | |
| /// <returns>A hexadecimal encoded MD5 hash for the file.</returns> | |
| public static string MD5FileHash(string filename) | |
| { | |
| using (FileStream stream = new FileStream(filename, FileMode.Open, FileAccess.Read)) | |
| { | |
| using (MD5 md5 = new MD5CryptoServiceProvider()) | |
| { | |
| byte[] hash = md5.ComputeHash(stream); | |
| StringBuilder builder = new StringBuilder(); | |
| foreach (byte b in hash) | |
| { | |
| builder.AppendFormat("{0:x2}", b); | |
| } | |
| return builder.ToString(); | |
| } | |
| } | |
| } | |
| /// <summary> | |
| /// Encrypts a string using the SHA256 (Secure Hash Algorithm) algorithm. | |
| /// Details: http://www.itl.nist.gov/fipspubs/fip180-1.htm | |
| /// This works in the same manner as MD5, providing however 256bit encryption. | |
| /// </summary> | |
| /// <param name="Data">A string containing the data to encrypt.</param> | |
| /// <returns>A string containing the string, encrypted with the SHA256 algorithm.</returns> | |
| public static string SHA256Hash(string Data) | |
| { | |
| SHA256 sha = new SHA256Managed(); | |
| byte[] hash = sha.ComputeHash(Encoding.ASCII.GetBytes(Data)); | |
| StringBuilder stringBuilder = new StringBuilder(); | |
| foreach (byte b in hash) | |
| { | |
| stringBuilder.AppendFormat("{0:x2}", b); | |
| } | |
| return stringBuilder.ToString(); | |
| } | |
| /// <summary> | |
| /// Encrypts a string using the SHA384(Secure Hash Algorithm) algorithm. | |
| /// This works in the same manner as MD5, providing 384bit encryption. | |
| /// </summary> | |
| /// <param name="Data">A string containing the data to encrypt.</param> | |
| /// <returns>A string containing the string, encrypted with the SHA384 algorithm.</returns> | |
| public static string SHA384Hash(string Data) | |
| { | |
| SHA384 sha = new SHA384Managed(); | |
| byte[] hash = sha.ComputeHash(Encoding.ASCII.GetBytes(Data)); | |
| StringBuilder stringBuilder = new StringBuilder(); | |
| foreach (byte b in hash) | |
| { | |
| stringBuilder.AppendFormat("{0:x2}", b); | |
| } | |
| return stringBuilder.ToString(); | |
| } | |
| /// <summary> | |
| /// Encrypts a string using the SHA512 (Secure Hash Algorithm) algorithm. | |
| /// This works in the same manner as MD5, providing 512bit encryption. | |
| /// </summary> | |
| /// <param name="Data">A string containing the data to encrypt.</param> | |
| /// <returns>A string containing the string, encrypted with the SHA512 algorithm.</returns> | |
| public static string SHA512Hash(string Data) | |
| { | |
| SHA512 sha = new SHA512Managed(); | |
| byte[] hash = sha.ComputeHash(Encoding.ASCII.GetBytes(Data)); | |
| StringBuilder stringBuilder = new StringBuilder(); | |
| foreach (byte b in hash) | |
| { | |
| stringBuilder.AppendFormat("{0:x2}", b); | |
| } | |
| return stringBuilder.ToString(); | |
| } | |
| } |
I'm Chris Small, a software engineer living and working in London. This is my tech blog. Find out more via Github, Stackoverflow, Resume