AesCryptoServiceProvider.CreateDecryptor Method
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Creates a symmetric AES decryptor object.
CreateDecryptor() |
Creates a symmetric AES decryptor object using the current key and initialization vector (IV). |
CreateDecryptor(Byte[], Byte[]) |
Creates a symmetric AES decryptor object using the specified key and initialization vector (IV). |
- Source:
- AesCryptoServiceProvider.cs
- Source:
- AesCryptoServiceProvider.cs
- Source:
- AesCryptoServiceProvider.cs
Creates a symmetric AES decryptor object using the current key and initialization vector (IV).
public:
override System::Security::Cryptography::ICryptoTransform ^ CreateDecryptor();
public override System.Security.Cryptography.ICryptoTransform CreateDecryptor ();
[System.Security.SecurityCritical]
public override System.Security.Cryptography.ICryptoTransform CreateDecryptor ();
override this.CreateDecryptor : unit -> System.Security.Cryptography.ICryptoTransform
[<System.Security.SecurityCritical>]
override this.CreateDecryptor : unit -> System.Security.Cryptography.ICryptoTransform
Public Overrides Function CreateDecryptor () As ICryptoTransform
Returns
A symmetric AES decryptor object.
- Attributes
Exceptions
The current key is invalid or missing.
Applies to
.NET 9 a ďalšie verzie
Produkt | Verzie |
---|---|
.NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 2.0, 2.1 |
- Source:
- AesCryptoServiceProvider.cs
- Source:
- AesCryptoServiceProvider.cs
- Source:
- AesCryptoServiceProvider.cs
Creates a symmetric AES decryptor object using the specified key and initialization vector (IV).
public:
override System::Security::Cryptography::ICryptoTransform ^ CreateDecryptor(cli::array <System::Byte> ^ rgbKey, cli::array <System::Byte> ^ rgbIV);
public:
override System::Security::Cryptography::ICryptoTransform ^ CreateDecryptor(cli::array <System::Byte> ^ key, cli::array <System::Byte> ^ iv);
public override System.Security.Cryptography.ICryptoTransform CreateDecryptor (byte[] rgbKey, byte[]? rgbIV);
public override System.Security.Cryptography.ICryptoTransform CreateDecryptor (byte[] rgbKey, byte[] rgbIV);
[System.Security.SecurityCritical]
public override System.Security.Cryptography.ICryptoTransform CreateDecryptor (byte[] key, byte[] iv);
public override System.Security.Cryptography.ICryptoTransform CreateDecryptor (byte[] key, byte[] iv);
override this.CreateDecryptor : byte[] * byte[] -> System.Security.Cryptography.ICryptoTransform
[<System.Security.SecurityCritical>]
override this.CreateDecryptor : byte[] * byte[] -> System.Security.Cryptography.ICryptoTransform
Public Overrides Function CreateDecryptor (rgbKey As Byte(), rgbIV As Byte()) As ICryptoTransform
Public Overrides Function CreateDecryptor (key As Byte(), iv As Byte()) As ICryptoTransform
Parameters
- rgbKeykey
- Byte[]
The secret key to use for the symmetric algorithm.
- rgbIViv
- Byte[]
The initialization vector to use for the symmetric algorithm.
Returns
A symmetric AES decryptor object.
- Attributes
Exceptions
key
or iv
is null
.
key
is invalid.
Examples
The following example shows how to use the AesCryptoServiceProvider.CreateDecryptor method to decrypt an encrypted message. This code example is part of a larger example provided for the AesCryptoServiceProvider class.
static string DecryptStringFromBytes_Aes(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 AesCryptoServiceProvider object
// with the specified key and IV.
using (AesCryptoServiceProvider aesAlg = new AesCryptoServiceProvider())
{
aesAlg.Key = Key;
aesAlg.IV = IV;
// Create a decryptor to perform the stream transform.
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.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;
}
Shared Function DecryptStringFromBytes_Aes(ByVal cipherText() As Byte,ByVal Key() As Byte, ByVal IV() As Byte) As String
' Check arguments.
If cipherText Is Nothing OrElse cipherText.Length <= 0 Then
Throw New ArgumentNullException("cipherText")
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
' Declare the string used to hold
' the decrypted text.
Dim plaintext As String = Nothing
' Create an AesCryptoServiceProvider object
' with the specified key and IV.
Using aesAlg As New AesCryptoServiceProvider()
aesAlg.Key = Key
aesAlg.IV = IV
' Create a decryptor to perform the stream transform.
Dim decryptor As ICryptoTransform = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV)
' Create the streams used for decryption.
Using msDecrypt As New MemoryStream(cipherText)
Using csDecrypt As New CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read)
Using srDecrypt As New StreamReader(csDecrypt)
' Read the decrypted bytes from the decrypting stream
' and place them in a string.
plaintext = srDecrypt.ReadToEnd()
End Using
End Using
End Using
End Using
Return plaintext
End Function 'DecryptStringFromBytes_Aes
End Class
let decryptStringFromBytes_Aes (cipherText : byte[], key : byte[], iv : byte[]) : string =
// Check arguments.
if (isNull cipherText || cipherText.Length <= 0) then nullArg "cipherText"
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 a decryptor to perform the stream transform.
let decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV)
// Create the streams used for decryption.
use msDecrypt = new MemoryStream(cipherText)
use csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read)
use srDecrypt = new StreamReader(csDecrypt)
// Read the decrypted bytes from the decrypting stream
// and return the resulting string.
srDecrypt.ReadToEnd()
Applies to
.NET 9 a ďalšie verzie
Produkt | Verzie |
---|---|
.NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 2.0, 2.1 |
Pripomienky k produktu .NET
.NET je open-source projekt. Ak chcete poskytnúť pripomienky, vyberte prepojenie: