构造函数
名称 说明
System_CAPS_pubmethod RijndaelManaged()
初始化 RijndaelManaged 类的新实例。
属性
名称 说明
System_CAPS_pubproperty BlockSize
获取或设置加密操作的块大小(以位为单位)。(继承自 SymmetricAlgorithm。)
System_CAPS_pubproperty FeedbackSize
获取或设置加密操作的反馈大小(以位为单位)。(继承自 SymmetricAlgorithm。)
System_CAPS_pubproperty IV
获取或设置对称算法的初始化向量 (IV)。(继承自 SymmetricAlgorithm。)
System_CAPS_pubproperty Key
获取或设置对称算法的密钥。(继承自 SymmetricAlgorithm。)
System_CAPS_pubproperty KeySize
获取或设置对称算法所用密钥的大小(以位为单位)。(继承自 SymmetricAlgorithm。)
System_CAPS_pubproperty LegalBlockSizes
获取对称算法支持的块大小(以位为单位)。(继承自 SymmetricAlgorithm。)
System_CAPS_pubproperty LegalKeySizes
获取对称算法支持的密钥大小(以位为单位)。(继承自 SymmetricAlgorithm。)
System_CAPS_pubproperty Mode
获取或设置对称算法的运算模式。(继承自 SymmetricAlgorithm。)
System_CAPS_pubproperty Padding
获取或设置对称算法中使用的填充模式。(继承自 SymmetricAlgorithm。)
方法
名称 说明
System_CAPS_pubmethod Clear()
释放 SymmetricAlgorithm 类使用的所有资源。(继承自 SymmetricAlgorithm。)
System_CAPS_pubmethod CreateDecryptor()
用当前的 Key 属性和初始化向量 (IV) 创建对称解密器对象。(继承自 SymmetricAlgorithm。)
System_CAPS_pubmethod CreateDecryptor(Byte[], Byte[])
创建对称 Rijndael 解密器对象具有指定 Key 和初始化向量 (IV)。(覆盖SymmetricAlgorithm.CreateDecryptor(Byte[], Byte[])。)
System_CAPS_pubmethod CreateEncryptor()
用当前的 Key 属性和初始化向量 (IV) 创建对称加密器对象。(继承自 SymmetricAlgorithm。)
System_CAPS_pubmethod CreateEncryptor(Byte[], Byte[])
创建对称 Rijndael 加密器对象具有指定 Key 和初始化向量 (IV)。(覆盖SymmetricAlgorithm.CreateEncryptor(Byte[], Byte[])。)
System_CAPS_pubmethod Dispose()
释放 SymmetricAlgorithm 类的当前实例所使用的所有资源。(继承自 SymmetricAlgorithm。)
System_CAPS_pubmethod Equals(Object)
确定指定的对象是否等于当前对象。(继承自 Object。)
System_CAPS_pubmethod GenerateIV()
生成的随机初始化向量 (IV) 要用于该算法。(覆盖 SymmetricAlgorithm.GenerateIV()。)
System_CAPS_pubmethod GenerateKey()
生成的随机 Key 要用于该算法。(覆盖 SymmetricAlgorithm.GenerateKey()。)
System_CAPS_pubmethod GetHashCode()
作为默认哈希函数。(继承自 Object。)
System_CAPS_pubmethod GetType()
获取当前实例的 Type。(继承自 Object。)
System_CAPS_pubmethod ToString()
返回表示当前对象的字符串。(继承自 Object。)
System_CAPS_pubmethod ValidKeySize(Int32)
确定指定的密钥大小对当前算法是否有效。(继承自 SymmetricAlgorithm。)
备注
此算法支持 128、 192 或 256 位的密钥长度。
示例
下面的示例演示如何进行加密和解密使用示例数据 RijndaelManaged 类。
C#
C++
VB
using System;
using System.IO;
using System.Security.Cryptography;
namespace RijndaelManaged_Example
{
class RijndaelExample
{
public static void Main()
{
try
{
string original = "Here is some data to encrypt!";
// Create a new instance of the RijndaelManaged
// class. This generates a new key and initialization
// vector (IV).
using (RijndaelManaged myRijndael = new RijndaelManaged())
{
myRijndael.GenerateKey();
myRijndael.GenerateIV();
// Encrypt the string to an array of bytes.
byte[] encrypted = EncryptStringToBytes(original, myRijndael.Key, myRijndael.IV);
// Decrypt the bytes to a string.
string roundtrip = DecryptStringFromBytes(encrypted, myRijndael.Key, myRijndael.IV);
//Display the original data and the decrypted data.
Console.WriteLine("Original: {0}", original);
Console.WriteLine("Round Trip: {0}", roundtrip);
}
}
catch (Exception e)
{
Console.WriteLine("Error: {0}", e.Message);
}
}
static byte[] EncryptStringToBytes(string plainText, byte[] Key, byte[] IV)
{
// Check arguments.
if (plainText == null || plainText.Length <= 0)
throw new ArgumentNullException("plainText");
if (Key == null || Key.Length <= 0)
throw new ArgumentNullException("Key");
if (IV == null || IV.Length <= 0)
throw new ArgumentNullException("IV");
byte[] encrypted;
// Create an RijndaelManaged object
// with the specified key and IV.
using (RijndaelManaged rijAlg = new RijndaelManaged())
{
rijAlg.Key = Key;
rijAlg.IV = IV;
// Create a decrytor to perform the stream transform.
ICryptoTransform encryptor = rijAlg.CreateEncryptor(rijAlg.Key, rijAlg.IV);
// Create the streams used for encryption.
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(plainText);
}
encrypted = msEncrypt.ToArray();
}
}
}
// Return the encrypted bytes from the memory stream.
return encrypted;
}
static string DecryptStringFromBytes(byte[] cipherText, byte[] Key, byte[] IV)
{
// Check arguments.
if (cipherText == null || cipherText.Length <= 0)
throw new ArgumentNullException("cipherText");
if (Key == null || Key.Length <= 0)
throw new ArgumentNullException("Key");
if (IV == null || IV.Length <= 0)
throw new ArgumentNullException("IV");
// Declare the string used to hold
// the decrypted text.
string plaintext = null;
// Create an RijndaelManaged object
// with the specified key and IV.
using (RijndaelManaged rijAlg = new RijndaelManaged())
{
rijAlg.Key = Key;
rijAlg.IV = IV;
// Create a decrytor to perform the stream transform.
ICryptoTransform decryptor = rijAlg.CreateDecryptor(rijAlg.Key, rijAlg.IV);
// Create the streams used for decryption.
using (MemoryStream msDecrypt = new MemoryStream(cipherText))
{
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
{
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
plaintext = srDecrypt.ReadToEnd();
}
}
}
}
return plaintext;
}
}
}
版本信息
.NET Framework
自 1.1 起可用
线程安全
此类型的所有公共静态(Visual Basic 中的 已共享 在 Visual Basic 中)成员都是线程安全的。不保证所有实例成员都是线程安全的。
另请参阅
System.Security.Cryptography 命名空间
加密服务
from:https://msdn.microsoft.com/zh-cn/library/system.security.cryptography.rijndaelmanaged(v=vs.110).aspx