MD5加密算法

最新推荐文章于 2019-12-14 12:31:47 发布

转载最新推荐文章于 2019-12-14 12:31:47 发布 · 85 阅读

本文介绍了一个简单的MD5哈希工具类的实现方法，包括如何将输入字符串转换为32位十六进制字符串形式的哈希值，以及如何验证一个哈希值是否与给定的字符串匹配。

    public class CryptTool
    {
        // Hash an input string and return the hash as
        // a 32 character hexadecimal string.
        public static string getMd5Hash(string input)
        {
            // Create a new instance of the MD5CryptoServiceProvider object.
            MD5 md5Hasher = MD5.Create();

            // Convert the input string to a byte array and compute the hash.
            byte[] data = md5Hasher.ComputeHash(Encoding.Default.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.
        public static bool verifyMd5Hash(string input, string hash)
        {
            // Hash the input.
            string hashOfInput = getMd5Hash(input);

            // Create a StringComparer an comare the hashes.
            StringComparer comparer = StringComparer.OrdinalIgnoreCase;

            if (0 == comparer.Compare(hashOfInput, hash))
            {
                return true;
            }
            else
            {
                return false;
            }
        }
}