/// <summary> /// MD5 Encrypt a string /// </summary> /// <param name="input">The input string</param> /// <param name="md5Length">The <see cref="MD5Length"/> enum.</param> /// <returns>The 16 or 32 length hex string.</returns> public static string Encrypt(string input, MD5Length md5Length) { string md5 = String.Empty; for (int i = 0; i <= 30; i++) { m_lOnBits[i] = Convert.ToInt64(Math.Pow(2, i + 1) - 1); m_l2Power[i] = Convert.ToInt64(Math.Pow(2, i)); } long[] x = null; int k = 0; long AA = 0; long BB = 0; long CC = 0; long DD = 0; long a = 0; long b = 0; long c = 0; long d = 0; const int S11 = 7; const int S12 = 12; const int S13 = 17; const int S14 = 22; const int S21 = 5; const int S22 = 9; const int S23 = 14; const int S24 = 20; const int S31 = 4; const int S32 = 11; const int S33 = 16; const int S34 = 23; const int S41 = 6; const int S42 = 10; const int S43 = 15; const int S44 = 21; x = ConvertToWordArray(input); a = 0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476; for (k = 0; k < x.Length; k += 16) { AA = a; BB = b; CC = c; DD = d; md5_FF(ref a, b, c, d, x[k + 0], S11, 0xD76AA478); md5_FF(ref d, a, b, c, x[k + 1], S12, 0xE8C7B756); md5_FF(ref c, d, a, b, x[k + 2], S13, 0x242070DB); md5_FF(ref b, c, d, a, x[k + 3], S14, 0xC1BDCEEE); md5_FF(ref a, b, c, d, x[k + 4], S11, 0xF57C0FAF); md5_FF(ref d, a, b, c, x[k + 5], S12, 0x4787C62A); md5_FF(ref c, d, a, b, x[k + 6], S13, 0xA8304613); md5_FF(ref b, c, d, a, x[k + 7], S14, 0xFD469501); md5_FF(ref a, b, c, d, x[k + 8], S11, 0x698098D8); md5_FF(ref d, a, b, c, x[k + 9], S12, 0x8B44F7AF); md5_FF(ref c, d, a, b, x[k + 10], S13, 0xFFFF5BB1); md5_FF(ref b, c, d, a, x[k + 11], S14, 0x895CD7BE); md5_FF(ref a, b, c, d, x[k + 12], S11, 0x6B901122); md5_FF(ref d, a, b, c, x[k + 13], S12, 0xFD987193); md5_FF(ref c, d, a, b, x[k + 14], S13, 0xA679438E); md5_FF(ref b, c, d, a, x[k + 15], S14, 0x49B40821); md5_GG(ref a, b, c, d, x[k + 1], S21, 0xF61E2562); md5_GG(ref d, a, b, c, x[k + 6], S22, 0xC040B340); md5_GG(ref c, d, a, b, x[k + 11], S23, 0x265E5A51); md5_GG(ref b, c, d, a, x[k + 0], S24, 0xE9B6C7AA); md5_GG(ref a, b, c, d, x[k + 5], S21, 0xD62F105D); md5_GG(ref d, a, b, c, x[k + 10], S22, 0x2441453); md5_GG(ref c, d, a, b, x[k + 15], S23, 0xD8A1E681); md5_GG(ref b, c, d, a, x[k + 4], S24, 0xE7D3FBC8); md5_GG(ref a, b, c, d, x[k + 9], S21, 0x21E1CDE6); md5_GG(ref d, a, b, c, x[k + 14], S22, 0xC33707D6); md5_GG(ref c, d, a, b, x[k + 3], S23, 0xF4D50D87); md5_GG(ref b, c, d, a, x[k + 8], S24, 0x455A14ED); md5_GG(ref a, b, c, d, x[k + 13], S21, 0xA9E3E905); md5_GG(ref d, a, b, c, x[k + 2], S22, 0xFCEFA3F8); md5_GG(ref c, d, a, b, x[k + 7], S23, 0x676F02D9); md5_GG(ref b, c, d, a, x[k + 12], S24, 0x8D2A4C8A); md5_HH(ref a, b, c, d, x[k + 5], S31, 0xFFFA3942); md5_HH(ref d, a, b, c, x[k + 8], S32, 0x8771F681); md5_HH(ref c, d, a, b, x[k + 11], S33, 0x6D9D6122); md5_HH(ref b, c, d, a, x[k + 14], S34, 0xFDE5380C); md5_HH(ref a, b, c, d, x[k + 1], S31, 0xA4BEEA44); md5_HH(ref d, a, b, c, x[k + 4], S32, 0x4BDECFA9); md5_HH(ref c, d, a, b, x[k + 7], S33, 0xF6BB4B60); md5_HH(ref b, c, d, a, x[k + 10], S34, 0xBEBFBC70); md5_HH(ref a, b, c, d, x[k + 13], S31, 0x289B7EC6); md5_HH(ref d, a, b, c, x[k + 0], S32, 0xEAA127FA); md5_HH(ref c, d, a, b, x[k + 3], S33, 0xD4EF3085); md5_HH(ref b, c, d, a, x[k + 6], S34, 0x4881D05); md5_HH(ref a, b, c, d, x[k + 9], S31, 0xD9D4D039); md5_HH(ref d, a, b, c, x[k + 12], S32, 0xE6DB99E5); md5_HH(ref c, d, a, b, x[k + 15], S33, 0x1FA27CF8); md5_HH(ref b, c, d, a, x[k + 2], S34, 0xC4AC5665); md5_II(ref a, b, c, d, x[k + 0], S41, 0xF4292244); md5_II(ref d, a, b, c, x[k + 7], S42, 0x432AFF97); md5_II(ref c, d, a, b, x[k + 14], S43, 0xAB9423A7); md5_II(ref b, c, d, a, x[k + 5], S44, 0xFC93A039); md5_II(ref a, b, c, d, x[k + 12], S41, 0x655B59C3); md5_II(ref d, a, b, c, x[k + 3], S42, 0x8F0CCC92); md5_II(ref c, d, a, b, x[k + 10], S43, 0xFFEFF47D); md5_II(ref b, c, d, a, x[k + 1], S44, 0x85845DD1); md5_II(ref a, b, c, d, x[k + 8], S41, 0x6FA87E4F); md5_II(ref d, a, b, c, x[k + 15], S42, 0xFE2CE6E0); md5_II(ref c, d, a, b, x[k + 6], S43, 0xA3014314); md5_II(ref b, c, d, a, x[k + 13], S44, 0x4E0811A1); md5_II(ref a, b, c, d, x[k + 4], S41, 0xF7537E82); md5_II(ref d, a, b, c, x[k + 11], S42, 0xBD3AF235); md5_II(ref c, d, a, b, x[k + 2], S43, 0x2AD7D2BB); md5_II(ref b, c, d, a, x[k + 9], S44, 0xEB86D391); a = AddUnsigned(a, AA); b = AddUnsigned(b, BB); c = AddUnsigned(c, CC); d = AddUnsigned(d, DD); } if (md5Length == MD5Length.ThirtyTwo) { md5 = ((((WordToHex(a)) + (WordToHex(b))) + (WordToHex(c))) + (WordToHex(d))).ToLower(); } else { md5 = ((WordToHex(b)) + (WordToHex(c))).ToLower(); } return md5; }
/// <summary> /// MD5 hash /// </summary> /// <param name="srcString">The string to be encrypted.</param> /// <param name="length">The length of hash result , default value is <see cref="MD5Length.L32"/>.</param> /// <returns></returns> public static string Md5(string srcString, MD5Length length = MD5Length.L32) { byte[] bytes = Encoding.UTF8.GetBytes(srcString); return(Md5(bytes, length)); }