Created
April 16, 2013 07:44
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MD5 encryption C# implementation
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using System; | |
using System.Security.Cryptography; | |
using System.Text; | |
namespace MD5Sample | |
{ | |
class Program | |
{ | |
static void Main(string[] args) | |
{ | |
string source = "Hello World!"; | |
using (MD5 md5Hash = MD5.Create()) | |
{ | |
string hash = GetMd5Hash(md5Hash, source); | |
Console.WriteLine("The MD5 hash of " + source + " is: " + hash + "."); | |
Console.WriteLine("Verifying the hash..."); | |
if (VerifyMd5Hash(md5Hash, source, hash)) | |
{ | |
Console.WriteLine("The hashes are the same."); | |
} | |
else | |
{ | |
Console.WriteLine("The hashes are not same."); | |
} | |
} | |
} | |
static string GetMd5Hash(MD5 md5Hash, string input) | |
{ | |
// Convert the input string to a byte array and compute the hash. | |
byte[] data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(input)); | |
// Create a new Stringbuilder to collect the bytes | |
// and create a string. | |
StringBuilder sBuilder = new StringBuilder(); | |
// Loop through each byte of the hashed data | |
// and format each one as a hexadecimal string. | |
for (int i = 0; i < data.Length; i++) | |
{ | |
sBuilder.Append(data[i].ToString("x2")); | |
} | |
// Return the hexadecimal string. | |
return sBuilder.ToString(); | |
} | |
// Verify a hash against a string. | |
static bool VerifyMd5Hash(MD5 md5Hash, string input, string hash) | |
{ | |
// Hash the input. | |
string hashOfInput = GetMd5Hash(md5Hash, input); | |
// Create a StringComparer an compare the hashes. | |
StringComparer comparer = StringComparer.OrdinalIgnoreCase; | |
if (0 == comparer.Compare(hashOfInput, hash)) | |
{ | |
return true; | |
} | |
else | |
{ | |
return false; | |
} | |
} | |
} | |
} | |
// This code example produces the following output: | |
// | |
// The MD5 hash of Hello World! is: ed076287532e86365e841e92bfc50d8c. | |
// Verifying the hash... | |
// The hashes are the same. |
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