AesCryptoServiceProvider.CreateEncryptor 方法

定义

命名空间:

System.Security.Cryptography

程序集:

System.Security.Cryptography.dll

创建对称 AES 加密器对象。

重载

CreateEncryptor()	使用当前的密钥和初始化向量 (IV) 创建对称 AES 加密器对象。
CreateEncryptor(Byte[], Byte[])	使用指定的密钥和初始化向量 (IV) 创建对称加密器对象。

CreateEncryptor()

Source:

AesCryptoServiceProvider.cs

使用当前的密钥和初始化向量 (IV) 创建对称 AES 加密器对象。

public:
 override System::Security::Cryptography::ICryptoTransform ^ CreateEncryptor();

public override System.Security.Cryptography.ICryptoTransform CreateEncryptor ();

override this.CreateEncryptor : unit -> System.Security.Cryptography.ICryptoTransform

Public Overrides Function CreateEncryptor () As ICryptoTransform

返回

ICryptoTransform

对称 AES 加密器对象。

CreateEncryptor(Byte[], Byte[])

Source:

AesCryptoServiceProvider.cs

使用指定的密钥和初始化向量 (IV) 创建对称加密器对象。

public:
 override System::Security::Cryptography::ICryptoTransform ^ CreateEncryptor(cli::array <System::Byte> ^ rgbKey, cli::array <System::Byte> ^ rgbIV);

public override System.Security.Cryptography.ICryptoTransform CreateEncryptor (byte[] rgbKey, byte[]? rgbIV);

override this.CreateEncryptor : byte[] * byte[] -> System.Security.Cryptography.ICryptoTransform

Public Overrides Function CreateEncryptor (rgbKey As Byte(), rgbIV As Byte()) As ICryptoTransform

参数

rgbKey

Byte[]

用于对称算法的密钥。

rgbIV

Byte[]

用于对称算法的初始化向量。

返回

ICryptoTransform

对称 AES 加密器对象。

例外

ArgumentNullException

key 或 iv 参数为 null。

ArgumentException

key 无效。

示例

以下示例演示如何使用 AesCryptoServiceProvider.CreateEncryptor 方法来加密消息。 此代码示例是为 AesCryptoServiceProvider 类提供的一个更大示例的一部分。

static byte[] EncryptStringToBytes_Aes(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 AesCryptoServiceProvider object
    // with the specified key and IV.
    using (AesCryptoServiceProvider aesAlg = new AesCryptoServiceProvider())
    {
        aesAlg.Key = Key;
        aesAlg.IV = IV;

        // Create an encryptor to perform the stream transform.
        ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.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;
}

Shared Function EncryptStringToBytes_Aes(ByVal plainText As String, ByVal Key() As Byte, ByVal IV() As Byte) As Byte() 
    ' Check arguments.
    If plainText Is Nothing OrElse plainText.Length <= 0 Then
        Throw New ArgumentNullException("plainText")
    End If
    If Key Is Nothing OrElse Key.Length <= 0 Then
        Throw New ArgumentNullException("Key")
    End If
    If IV Is Nothing OrElse IV.Length <= 0 Then
        Throw New ArgumentNullException("IV")
    End If
    Dim encrypted() As Byte
    
    ' Create an AesCryptoServiceProvider object
    ' with the specified key and IV.
    Using aesAlg As New AesCryptoServiceProvider()

        aesAlg.Key = Key
        aesAlg.IV = IV

        ' Create an encryptor to perform the stream transform.
        Dim encryptor As ICryptoTransform = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV)

        ' Create the streams used for encryption.
        Dim msEncrypt As New MemoryStream()
        Using csEncrypt As New CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)
            Using swEncrypt As New StreamWriter(csEncrypt)
                'Write all data to the stream.
                swEncrypt.Write(plainText)
            End Using
            encrypted = msEncrypt.ToArray()

        End Using
    End Using

    ' Return the encrypted bytes from the memory stream.
    Return encrypted

End Function 'EncryptStringToBytes_Aes

let encryptStringToBytes_Aes (plainText: string, key : byte[], iv : byte[]) : byte[] =

    // Check arguments.
    if (isNull plainText || plainText.Length <= 0) then nullArg "plainText"
    if (isNull key || key.Length <= 0) then nullArg "key"
    if (isNull iv || iv.Length <= 0) then nullArg "iv"
    
    // Create an AesCryptoServiceProvider object
    // with the specified key and IV.
    use aesAlg = new AesCryptoServiceProvider()
    aesAlg.Key <- key
    aesAlg.IV <- iv

    // Create an encryptor to perform the stream transform.
    let encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV)

    // Create the streams used for encryption.
    use msEncrypt = new MemoryStream()
    use csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)
    use swEncrypt = new StreamWriter(csEncrypt)
    
    //Write all data to the stream.
    swEncrypt.Write(plainText)
    swEncrypt.Flush()
    
    // Return the encrypted bytes from the memory stream.
    msEncrypt.ToArray()

注解

请参阅 和 属性中的LegalKeySizes代码示例，以确定 和 iv 参数的大小key。LegalBlockSizes