不限制长度Rsa加密算法超出117解决方案.doc

Rsa加密算法加密长度限制是117字节，下面展示的是不限制长度rsa改造方法包含的有加密解密 加密的内容与原类型比较是否所有值都相等以及一个单元测试public class RsaHelper public static string PubKey =” 自己用下面生成的”; /公钥 public static string PriKey =” 自己用下面生成的”; /私钥 public struct RsaKey public string PublicKey get; set; public string PrivateKey get; set; / / 创建公钥私钥 / / static public RsaKey GEN_Key() var rsa = new RSACryptoServiceProvider(); return new RsaKey() /写死加快执行速度 /PublicKey = rsa.ToXmlString(false), /生成公钥 自己生成填到上面 /PrivateKey = rsa.ToXmlString(true) /生成私钥 自己生成填到上面 ; / / 解密 / / 要解密的字符串 / 私钥 / public static string RsaDecrypt(string encryptedInput, string privateKey) if (string.IsNullOrEmpty(encryptedInput) return string.Empty; if (string.IsNullOrWhiteSpace(privateKey) throw new ArgumentException(Invalid Private Key); using (var rsaProvider = new RSACryptoServiceProvider() var inputBytes = Convert.FromBase64String(encryptedInput); rsaProvider.FromXmlString(privateKey); int bufferSize = rsaProvider.KeySize / 8; var buffer = new bytebufferSize; using (MemoryStream inputStream = new MemoryStream(inputBytes), outputStream = new MemoryStream() while (true) int readSize = inputStream.Read(buffer, 0, bufferSize); if (readSize = 0) break; var temp = new bytereadSize; Array.Copy(buffer, 0, temp, 0, readSize); var rawBytes = rsaProvider.Decrypt(temp, false); outputStream.Write(rawBytes, 0, rawBytes.Length); return Encoding.UTF8.GetString(outputStream.ToArray(); / / 加密 / / 要加密的字符串 / 公钥 / public static string RsaEncrypt(string rawInput, string publicKey) if (string.IsNullOrEmpty(rawInput) return string.Empty; if (string.IsNullOrWhiteSpace(publicKey) throw new ArgumentException(Invalid Public Key); using (var rsaProvider = new RSACryptoServiceProvider() var inputBytes = Encoding.UTF8.GetBytes(rawInput);/有含义的字符串转化为字节流 rsaProvider.FromXmlString(publicKey);/载入公钥 int bufferSize = (rsaProvider.KeySize / 8) - 11;/单块最大长度 var buffer = new bytebufferSize; using (MemoryStream inputStream = new MemoryStream(inputBytes), outputStream = new MemoryStream() while (true) /分段加密 int readSize = inputStream.Read(buffer, 0, bufferSize); if (readSize = 0) break; var temp = new bytereadSize; Array.Copy(buffer, 0, temp, 0, readSize); var encryptedBytes = rsaProvider.Encrypt(temp, false); outputStream.Write(encryptedBytes, 0, encryptedBytes.Length); return Convert.ToBase64String(outputStream.ToArray();/转化为字节流方便传输 / / 加密后的字符串反序列化成类和原类值比对 / / / / / public static bool Compare(T tOri, string strEncry) try var decryStr = RsaDecrypt(strEncry, PriKey); var flag = true; T tDecry = JsonConvert.DeserializeObject(decryStr); PropertyInfo propertyInfos1 = tOri.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance); foreach (var propertyInfo in propertyInfos1) var name = propertyInfo.Name; var val1 = propertyInfo.GetValue(tOri, null); var val2 = tDecry.GetType().GetProperty(name).GetValue(tDecry, null); if (val1.ToString() != val2.ToString() flag = false; break; return flag; catch (Exception) return false; 单元测试部分class TestClass public string sc get; set; public string no get; set; public string na get; set; TestMethod public void TestRsa() var testClass = new TestClass() sc = his51, no = 1, na = 管理员 ; /公钥加密 var encryptStr=RsaHelper.RsaEncrypt(JsonConvert.SerializeObject(testClass), RsaHelper.PubKey); /私钥解密 var decryptStr = RsaHelper.RsaDecrypt(encryptStr, RsaHelper.PriKey); /类值加密字符串校验 var flag = RsaHelper.Compare(testClass, encryptStr); Assert.IsTrue(flag); TestMe