RSACryptoServiceProvider Construtores
Definição
Importante
Algumas informações dizem respeito a um produto pré-lançado que pode ser substancialmente modificado antes de ser lançado. A Microsoft não faz garantias, de forma expressa ou implícita, em relação à informação aqui apresentada.
Inicializa uma nova instância da RSACryptoServiceProvider classe.
Sobrecargas
| Name | Description |
|---|---|
| RSACryptoServiceProvider() |
Inicializa uma nova instância da RSACryptoServiceProvider classe com um par de chaves aleatórias. |
| RSACryptoServiceProvider(Int32) |
Inicializa uma nova instância da RSACryptoServiceProvider classe com um par de chaves aleatórias do tamanho especificado. |
| RSACryptoServiceProvider(CspParameters) |
Inicializa uma nova instância da RSACryptoServiceProvider classe com os parâmetros especificados. |
| RSACryptoServiceProvider(Int32, CspParameters) |
Inicializa uma nova instância da RSACryptoServiceProvider classe com o tamanho e parâmetros da chave especificados. |
RSACryptoServiceProvider()
Inicializa uma nova instância da RSACryptoServiceProvider classe com um par de chaves aleatórias.
public:
RSACryptoServiceProvider();[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public RSACryptoServiceProvider();public RSACryptoServiceProvider();Public Sub New ()- Atributos
Exceções
O fornecedor de serviços criptográficos (CSP) não pode ser adquirido.
Exemplos
O exemplo de código seguinte utiliza a RSACryptoServiceProvider classe para encriptar uma cadeia num array de bytes e depois desencriptar esses bytes novamente numa cadeia.
using System;
using System.Security.Cryptography;
using System.Text;
class RSACSPSample
{
static void Main()
{
try
{
//Create a UnicodeEncoder to convert between byte array and string.
UnicodeEncoding ByteConverter = new UnicodeEncoding();
//Create byte arrays to hold original, encrypted, and decrypted data.
byte[] dataToEncrypt = ByteConverter.GetBytes("Data to Encrypt");
byte[] encryptedData;
byte[] decryptedData;
//Create a new instance of RSACryptoServiceProvider to generate
//public and private key data.
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider())
{
//Pass the data to ENCRYPT, the public key information
//(using RSACryptoServiceProvider.ExportParameters(false),
//and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt, RSA.ExportParameters(false), false);
//Pass the data to DECRYPT, the private key information
//(using RSACryptoServiceProvider.ExportParameters(true),
//and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData, RSA.ExportParameters(true), false);
//Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));
}
}
catch (ArgumentNullException)
{
//Catch this exception in case the encryption did
//not succeed.
Console.WriteLine("Encryption failed.");
}
}
public static byte[] RSAEncrypt(byte[] DataToEncrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding)
{
try
{
byte[] encryptedData;
//Create a new instance of RSACryptoServiceProvider.
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider())
{
//Import the RSA Key information. This only needs
//to include the public key information.
RSA.ImportParameters(RSAKeyInfo);
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
encryptedData = RSA.Encrypt(DataToEncrypt, DoOAEPPadding);
}
return encryptedData;
}
//Catch and display a CryptographicException
//to the console.
catch (CryptographicException e)
{
Console.WriteLine(e.Message);
return null;
}
}
public static byte[] RSADecrypt(byte[] DataToDecrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding)
{
try
{
byte[] decryptedData;
//Create a new instance of RSACryptoServiceProvider.
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider())
{
//Import the RSA Key information. This needs
//to include the private key information.
RSA.ImportParameters(RSAKeyInfo);
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
decryptedData = RSA.Decrypt(DataToDecrypt, DoOAEPPadding);
}
return decryptedData;
}
//Catch and display a CryptographicException
//to the console.
catch (CryptographicException e)
{
Console.WriteLine(e.ToString());
return null;
}
}
}
Imports System.Security.Cryptography
Imports System.Text
_
Class RSACSPSample
Shared Sub Main()
Try
'Create a UnicodeEncoder to convert between byte array and string.
Dim ByteConverter As New UnicodeEncoding()
'Create byte arrays to hold original, encrypted, and decrypted data.
Dim dataToEncrypt As Byte() = ByteConverter.GetBytes("Data to Encrypt")
Dim encryptedData() As Byte
Dim decryptedData() As Byte
'Create a new instance of RSACryptoServiceProvider to generate
'public and private key data.
Using RSA As New RSACryptoServiceProvider
'Pass the data to ENCRYPT, the public key information
'(using RSACryptoServiceProvider.ExportParameters(false),
'and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt, RSA.ExportParameters(False), False)
'Pass the data to DECRYPT, the private key information
'(using RSACryptoServiceProvider.ExportParameters(true),
'and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData, RSA.ExportParameters(True), False)
'Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData))
End Using
Catch e As ArgumentNullException
'Catch this exception in case the encryption did
'not succeed.
Console.WriteLine("Encryption failed.")
End Try
End Sub
Public Shared Function RSAEncrypt(ByVal DataToEncrypt() As Byte, ByVal RSAKeyInfo As RSAParameters, ByVal DoOAEPPadding As Boolean) As Byte()
Try
Dim encryptedData() As Byte
'Create a new instance of RSACryptoServiceProvider.
Using RSA As New RSACryptoServiceProvider
'Import the RSA Key information. This only needs
'toinclude the public key information.
RSA.ImportParameters(RSAKeyInfo)
'Encrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
encryptedData = RSA.Encrypt(DataToEncrypt, DoOAEPPadding)
End Using
Return encryptedData
'Catch and display a CryptographicException
'to the console.
Catch e As CryptographicException
Console.WriteLine(e.Message)
Return Nothing
End Try
End Function
Public Shared Function RSADecrypt(ByVal DataToDecrypt() As Byte, ByVal RSAKeyInfo As RSAParameters, ByVal DoOAEPPadding As Boolean) As Byte()
Try
Dim decryptedData() As Byte
'Create a new instance of RSACryptoServiceProvider.
Using RSA As New RSACryptoServiceProvider
'Import the RSA Key information. This needs
'to include the private key information.
RSA.ImportParameters(RSAKeyInfo)
'Decrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
decryptedData = RSA.Decrypt(DataToDecrypt, DoOAEPPadding)
'Catch and display a CryptographicException
'to the console.
End Using
Return decryptedData
Catch e As CryptographicException
Console.WriteLine(e.ToString())
Return Nothing
End Try
End Function
End Class
Observações
Este construtor cria um par de chaves Exchange adequado para encriptar chaves de sessão para que possam ser armazenadas e trocadas em segurança com outros utilizadores. A chave gerada corresponde a uma chave gerada usando o valor AT_KEYEXCHANGE usado na API Criptográfica de Microsoft não gerida (CAPI).
Este construtor não gera imediatamente um novo par de chaves público/privado. Se nenhuma chave for carregada através do ImportParameters método, ou de qualquer outro método de importação de chaves, antes de uma chave ser necessária, então uma chave efémera de 1024 bits é criada sob demanda.
Ver também
Aplica-se a
RSACryptoServiceProvider(Int32)
Inicializa uma nova instância da RSACryptoServiceProvider classe com um par de chaves aleatórias do tamanho especificado.
public:
RSACryptoServiceProvider(int dwKeySize);[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public RSACryptoServiceProvider(int dwKeySize);public RSACryptoServiceProvider(int dwKeySize);[<System.Runtime.Versioning.UnsupportedOSPlatform("browser")>]
new System.Security.Cryptography.RSACryptoServiceProvider : int -> System.Security.Cryptography.RSACryptoServiceProvidernew System.Security.Cryptography.RSACryptoServiceProvider : int -> System.Security.Cryptography.RSACryptoServiceProviderPublic Sub New (dwKeySize As Integer)Parâmetros
- dwKeySize
- Int32
O tamanho da chave a usar em bits.
- Atributos
Exceções
O fornecedor de serviços criptográficos (CSP) não pode ser adquirido.
Exemplos
O exemplo de código seguinte cria um RSACryptoServiceProvider, gera uma nova chave e armazena-a num contentor de chaves.
using System;
using System.Security.Cryptography;
using System.Text;
class RSACSPSample
{
static void Main()
{
try
{
//Create a UnicodeEncoder to convert between byte array and string.
UnicodeEncoding ByteConverter = new UnicodeEncoding();
//Create byte arrays to hold original, encrypted, and decrypted data.
byte[] dataToEncrypt = ByteConverter.GetBytes("Data to Encrypt");
byte[] encryptedData;
byte[] decryptedData;
//Create a new instance of RSACryptoServiceProvider to generate
//public and private key data. Pass an integer specifying a key-
//length of 2048.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(2048);
//Display the key-legth to the console.
Console.WriteLine("A new key pair of legth {0} was created", RSAalg.KeySize);
//Pass the data to ENCRYPT, the public key information
//(using RSACryptoServiceProvider.ExportParameters(false),
//and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt,RSAalg.ExportParameters(false), false);
//Pass the data to DECRYPT, the private key information
//(using RSACryptoServiceProvider.ExportParameters(true),
//and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData,RSAalg.ExportParameters(true), false);
//Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));
}
catch(ArgumentNullException)
{
//Catch this exception in case the encryption did
//not succeed.
Console.WriteLine("Encryption failed.");
}
}
static public byte[] RSAEncrypt(byte[] DataToEncrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding)
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();
//Import the RSA Key information. This only needs
//toinclude the public key information.
RSAalg.ImportParameters(RSAKeyInfo);
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
return null;
}
}
static public byte[] RSADecrypt(byte[] DataToDecrypt, RSAParameters RSAKeyInfo,bool DoOAEPPadding)
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();
//Import the RSA Key information. This needs
//to include the private key information.
RSAalg.ImportParameters(RSAKeyInfo);
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.ToString());
return null;
}
}
}
Imports System.Security.Cryptography
Imports System.Text
Module RSACSPExample
Sub Main()
Try
'Create a UnicodeEncoder to convert between byte array and string.
Dim ByteConverter As New UnicodeEncoding
'Create byte arrays to hold original, encrypted, and decrypted data.
Dim dataToEncrypt As Byte() = ByteConverter.GetBytes("Data to Encrypt")
Dim encryptedData() As Byte
Dim decryptedData() As Byte
'Create a new instance of RSACryptoServiceProvider to generate
'public and private key data. Pass an integer specifying a key-
'length of 2048.
Dim RSAalg As New RSACryptoServiceProvider(2048)
'Display the key-legth to the console.
Console.WriteLine("A new key pair of legth {0} was created", RSAalg.KeySize)
'Pass the data to ENCRYPT, the public key information
'(using RSACryptoServiceProvider.ExportParameters(false),
'and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt, RSAalg.ExportParameters(False), False)
'Pass the data to DECRYPT, the private key information
'(using RSACryptoServiceProvider.ExportParameters(true),
'and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData, RSAalg.ExportParameters(True), False)
'Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData))
Catch e As ArgumentNullException
'Catch this exception in case the encryption did
'not succeed.
Console.WriteLine("Encryption failed.")
End Try
End Sub
Function RSAEncrypt(ByVal DataToEncrypt() As Byte, ByVal RSAKeyInfo As RSAParameters, ByVal DoOAEPPadding As Boolean) As Byte()
Try
'Create a new instance of RSACryptoServiceProvider.
Dim RSAalg As New RSACryptoServiceProvider
'Import the RSA Key information. This only needs
'toinclude the public key information.
RSAalg.ImportParameters(RSAKeyInfo)
'Encrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
Return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding)
'Catch and display a CryptographicException
'to the console.
Catch e As CryptographicException
Console.WriteLine(e.Message)
Return Nothing
End Try
End Function
Function RSADecrypt(ByVal DataToDecrypt() As Byte, ByVal RSAKeyInfo As RSAParameters, ByVal DoOAEPPadding As Boolean) As Byte()
Try
'Create a new instance of RSACryptoServiceProvider.
Dim RSAalg As New RSACryptoServiceProvider
'Import the RSA Key information. This needs
'to include the private key information.
RSAalg.ImportParameters(RSAKeyInfo)
'Decrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
Return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding)
'Catch and display a CryptographicException
'to the console.
Catch e As CryptographicException
Console.WriteLine(e.ToString())
Return Nothing
End Try
End Function
End Module
Observações
Este construtor cria um par de chaves Exchange adequado para encriptar chaves de sessão para que possam ser armazenadas e trocadas em segurança com outros utilizadores. A chave gerada corresponde a uma chave gerada usando o valor AT_KEYEXCHANGE usado na API Criptográfica de Microsoft não gerida (CAPI).
Este construtor não gera imediatamente um novo par de chaves público/privado.
Se nenhuma chave for carregada através do ImportParameters método, ou de qualquer outro método de importação de chaves, antes de ser necessária uma chave, então uma dwKeySizechave efémera de -bits é criada a pedido.
Ver também
Aplica-se a
RSACryptoServiceProvider(CspParameters)
Inicializa uma nova instância da RSACryptoServiceProvider classe com os parâmetros especificados.
public:
RSACryptoServiceProvider(System::Security::Cryptography::CspParameters ^ parameters);[System.Runtime.Versioning.SupportedOSPlatform("windows")]
public RSACryptoServiceProvider(System.Security.Cryptography.CspParameters? parameters);public RSACryptoServiceProvider(System.Security.Cryptography.CspParameters parameters);[<System.Runtime.Versioning.SupportedOSPlatform("windows")>]
new System.Security.Cryptography.RSACryptoServiceProvider : System.Security.Cryptography.CspParameters -> System.Security.Cryptography.RSACryptoServiceProvidernew System.Security.Cryptography.RSACryptoServiceProvider : System.Security.Cryptography.CspParameters -> System.Security.Cryptography.RSACryptoServiceProviderPublic Sub New (parameters As CspParameters)Parâmetros
- parameters
- CspParameters
Os parâmetros a serem passados ao fornecedor de serviços criptográficos (CSP).
- Atributos
Exceções
O CSP não pode ser adquirido.
Exemplos
O exemplo de código seguinte cria um RSACryptoServiceProvider objeto, gera uma nova chave e armazena-a num contentor de chaves.
using System;
using System.Security.Cryptography;
using System.Text;
class RSACSPSample
{
static void Main()
{
try
{
string KeyContainerName = "MyKeyContainer";
//Create a new key and persist it in
//the key container.
RSAPersistKeyInCSP(KeyContainerName);
//Create a UnicodeEncoder to convert between byte array and string.
UnicodeEncoding ByteConverter = new UnicodeEncoding();
//Create byte arrays to hold original, encrypted, and decrypted data.
byte[] dataToEncrypt = ByteConverter.GetBytes("Data to Encrypt");
byte[] encryptedData;
byte[] decryptedData;
//Pass the data to ENCRYPT, the name of the key container,
//and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt,KeyContainerName, false);
//Pass the data to DECRYPT, the name of the key container,
//and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData,KeyContainerName, false);
//Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));
RSADeleteKeyInCSP(KeyContainerName);
}
catch(ArgumentNullException)
{
//Catch this exception in case the encryption did
//not succeed.
Console.WriteLine("Encryption failed.");
}
}
public static void RSAPersistKeyInCSP(string ContainerName)
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters cspParams = new CspParameters();
// Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName;
//Create a new instance of RSACryptoServiceProvider to generate
//a new key pair. Pass the CspParameters class to persist the
//key in the container.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);
//Indicate that the key was persisted.
Console.WriteLine("The RSA key was persisted in the container, \"{0}\".", ContainerName);
}
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
}
}
public static void RSADeleteKeyInCSP(string ContainerName)
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters cspParams = new CspParameters();
// Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName;
//Create a new instance of RSACryptoServiceProvider.
//Pass the CspParameters class to use the
//key in the container.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);
//Delete the key entry in the container.
RSAalg.PersistKeyInCsp = false;
//Call Clear to release resources and delete the key from the container.
RSAalg.Clear();
//Indicate that the key was persisted.
Console.WriteLine("The RSA key was deleted from the container, \"{0}\".", ContainerName);
}
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
}
}
static public byte[] RSAEncrypt(byte[] DataToEncrypt, string ContainerName, bool DoOAEPPadding)
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters cspParams = new CspParameters();
// Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName;
//Create a new instance of RSACryptoServiceProvider.
//Pass the CspParameters class to use the key
//from the key in the container.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
return null;
}
}
static public byte[] RSADecrypt(byte[] DataToDecrypt, string ContainerName, bool DoOAEPPadding)
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters cspParams = new CspParameters();
// Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName;
//Create a new instance of RSACryptoServiceProvider.
//Pass the CspParameters class to use the key
//from the key in the container.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.ToString());
return null;
}
}
}
Imports System.Security.Cryptography
Imports System.Text
Module RSACSPExample
Sub Main()
Try
Dim KeyContainerName As String = "MyKeyContainer"
'Create a new key and persist it in
'the key container.
RSAPersistKeyInCSP(KeyContainerName)
'Create a UnicodeEncoder to convert between byte array and string.
Dim ByteConverter As New UnicodeEncoding
'Create byte arrays to hold original, encrypted, and decrypted data.
Dim dataToEncrypt As Byte() = ByteConverter.GetBytes("Data to Encrypt")
Dim encryptedData() As Byte
Dim decryptedData() As Byte
'Pass the data to ENCRYPT, the name of the key container,
'and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt, KeyContainerName, False)
'Pass the data to DECRYPT, the name of the key container,
'and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData, KeyContainerName, False)
'Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData))
RSADeleteKeyInCSP(KeyContainerName)
Catch e As ArgumentNullException
'Catch this exception in case the encryption did
'not succeed.
Console.WriteLine("Encryption failed.")
End Try
End Sub
Sub RSAPersistKeyInCSP(ByVal ContainerName As String)
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters
' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName
'Create a new instance of RSACryptoServiceProvider to generate
'a new key pair. Pass the CspParameters class to persist the
'key in the container.
Dim RSAalg As New RSACryptoServiceProvider(cspParams)
'Indicate that the key was persisted.
Console.WriteLine("The RSA key was persisted in the container, ""{0}"".", ContainerName)
Catch e As CryptographicException
Console.WriteLine(e.Message)
End Try
End Sub
Sub RSADeleteKeyInCSP(ByVal ContainerName As String)
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters
' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName
'Create a new instance of RSACryptoServiceProvider.
'Pass the CspParameters class to use the
'key in the container.
Dim RSAalg As New RSACryptoServiceProvider(cspParams)
'Delete the key entry in the container.
RSAalg.PersistKeyInCsp = False
'Call Clear to release resources and delete the key from the container.
RSAalg.Clear()
'Indicate that the key was persisted.
Console.WriteLine("The RSA key was deleted from the container, ""{0}"".", ContainerName)
Catch e As CryptographicException
Console.WriteLine(e.Message)
End Try
End Sub
Function RSAEncrypt(ByVal DataToEncrypt() As Byte, ByVal ContainerName As String, ByVal DoOAEPPadding As Boolean) As Byte()
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters
' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName
'Create a new instance of RSACryptoServiceProvider.
'Pass the CspParameters class to use the key
'from the key in the container.
Dim RSAalg As New RSACryptoServiceProvider(cspParams)
'Encrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
Return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding)
'Catch and display a CryptographicException
'to the console.
Catch e As CryptographicException
Console.WriteLine(e.Message)
Return Nothing
End Try
End Function
Function RSADecrypt(ByVal DataToDecrypt() As Byte, ByVal ContainerName As String, ByVal DoOAEPPadding As Boolean) As Byte()
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters
' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName
'Create a new instance of RSACryptoServiceProvider.
'Pass the CspParameters class to use the key
'from the key in the container.
Dim RSAalg As New RSACryptoServiceProvider(cspParams)
'Decrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
Return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding)
'Catch and display a CryptographicException
'to the console.
Catch e As CryptographicException
Console.WriteLine(e.ToString())
Return Nothing
End Try
End Function
End Module
Observações
Este construtor cria ou reutiliza um contentor chave especificado usando o KeyContainerName campo do parameters parâmetro.
Por defeito, este construtor cria um par de chaves Exchange adequado para encriptar chaves de sessão para que possam ser armazenadas e trocadas em segurança com outros utilizadores. A chave gerada corresponde a uma chave gerada usando o valor AT_KEYEXCHANGE usado na API Criptográfica de Microsoft não gerida (CAPI).
Pode criar um Signature par de chaves adequado para autenticar mensagens ou ficheiros (assinados digitalmente) definindo o KeyNumber campo do parameters parâmetro para o Signature valor. Este tipo de chave corresponde ao AT_SIGNATURE valor usado no CAPI.
Se criares um objeto RSACryptoServiceProvider com o valor Exchange especificado e depois criares outro objeto RSACryptoServiceProvider com o valor Signature especificado, ambas as chaves serão colocadas num único contentor se ambos os objetos especificarem o mesmo nome de contentor de chaves.
Para criar uma chave compatível com assinatura de nome forte usando a RSACryptoServiceProvider classe, deve criar um Signature par de chaves.
Ver também
Aplica-se a
RSACryptoServiceProvider(Int32, CspParameters)
Inicializa uma nova instância da RSACryptoServiceProvider classe com o tamanho e parâmetros da chave especificados.
public:
RSACryptoServiceProvider(int dwKeySize, System::Security::Cryptography::CspParameters ^ parameters);[System.Runtime.Versioning.SupportedOSPlatform("windows")]
public RSACryptoServiceProvider(int dwKeySize, System.Security.Cryptography.CspParameters? parameters);public RSACryptoServiceProvider(int dwKeySize, System.Security.Cryptography.CspParameters parameters);[<System.Runtime.Versioning.SupportedOSPlatform("windows")>]
new System.Security.Cryptography.RSACryptoServiceProvider : int * System.Security.Cryptography.CspParameters -> System.Security.Cryptography.RSACryptoServiceProvidernew System.Security.Cryptography.RSACryptoServiceProvider : int * System.Security.Cryptography.CspParameters -> System.Security.Cryptography.RSACryptoServiceProviderPublic Sub New (dwKeySize As Integer, parameters As CspParameters)Parâmetros
- dwKeySize
- Int32
O tamanho da chave a usar em bits.
- parameters
- CspParameters
Os parâmetros a serem passados ao fornecedor de serviços criptográficos (CSP).
- Atributos
Exceções
Exemplos
O exemplo de código seguinte cria um RSACryptoServiceProvider, gera uma nova chave e armazena-a num contentor de chaves.
using System;
using System.Security.Cryptography;
using System.Text;
class RSACSPSample
{
static void Main()
{
try
{
string KeyContainerName = "MyKeyContainer";
//Create a new key and persist it in
//the key container.
RSAPersistKeyInCSP(KeyContainerName);
//Create a UnicodeEncoder to convert between byte array and string.
UnicodeEncoding ByteConverter = new UnicodeEncoding();
//Create byte arrays to hold original, encrypted, and decrypted data.
byte[] dataToEncrypt = ByteConverter.GetBytes("Data to Encrypt");
byte[] encryptedData;
byte[] decryptedData;
//Pass the data to ENCRYPT, the name of the key container,
//and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt,KeyContainerName, false);
//Pass the data to DECRYPT, the name of the key container,
//and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData,KeyContainerName, false);
//Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));
RSADeleteKeyInCSP(KeyContainerName);
}
catch(ArgumentNullException)
{
//Catch this exception in case the encryption did
//not succeed.
Console.WriteLine("Encryption failed.");
}
}
public static void RSAPersistKeyInCSP(string ContainerName)
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters cspParams = new CspParameters();
// Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName;
//Create a new instance of RSACryptoServiceProvider to generate
//a new key pair. Pass the CspParameters class to persist the
//key in the container. Pass an intger of 2048 to specify the
//key-size.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider( 2048, cspParams);
//Indicate that the key was persisted.
Console.WriteLine("The RSA key with a key-size of {0} was persisted in the container, \"{1}\".",
RSAalg.KeySize , ContainerName);
}
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
}
}
public static void RSADeleteKeyInCSP(string ContainerName)
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters cspParams = new CspParameters();
// Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName;
//Create a new instance of DSACryptoServiceProvider.
//Pass the CspParameters class to use the
//key in the container.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);
//Delete the key entry in the container.
RSAalg.PersistKeyInCsp = false;
//Call Clear to release resources and delete the key from the container.
RSAalg.Clear();
//Indicate that the key was persisted.
Console.WriteLine("The RSA key was deleted from the container, \"{0}\".", ContainerName);
}
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
}
}
static public byte[] RSAEncrypt(byte[] DataToEncrypt, string ContainerName, bool DoOAEPPadding)
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters cspParams = new CspParameters();
// Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName;
//Create a new instance of DSACryptoServiceProvider.
//Pass the CspParameters class to use the key
//from the key in the container.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
return null;
}
}
static public byte[] RSADecrypt(byte[] DataToDecrypt, string ContainerName, bool DoOAEPPadding)
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters cspParams = new CspParameters();
// Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName;
//Create a new instance of DSACryptoServiceProvider.
//Pass the CspParameters class to use the key
//from the key in the container.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.ToString());
return null;
}
}
}
Imports System.Security.Cryptography
Imports System.Text
Module RSACSPExample
Sub Main()
Try
Dim KeyContainerName As String = "MyKeyContainer"
'Create a new key and persist it in
'the key container.
RSAPersistKeyInCSP(KeyContainerName)
'Create a UnicodeEncoder to convert between byte array and string.
Dim ByteConverter As New UnicodeEncoding
'Create byte arrays to hold original, encrypted, and decrypted data.
Dim dataToEncrypt As Byte() = ByteConverter.GetBytes("Data to Encrypt")
Dim encryptedData() As Byte
Dim decryptedData() As Byte
'Pass the data to ENCRYPT, the name of the key container,
'and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt, KeyContainerName, False)
'Pass the data to DECRYPT, the name of the key container,
'and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData, KeyContainerName, False)
'Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData))
RSADeleteKeyInCSP(KeyContainerName)
Catch e As ArgumentNullException
'Catch this exception in case the encryption did
'not succeed.
Console.WriteLine("Encryption failed.")
End Try
End Sub
Sub RSAPersistKeyInCSP(ByVal ContainerName As String)
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters
' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName
'Create a new instance of RSACryptoServiceProvider to generate
'a new key pair. Pass the CspParameters class to persist the
'key in the container.
Dim RSAalg As New RSACryptoServiceProvider(2048, cspParams)
'Indicate that the key was persisted.
Console.WriteLine("The RSA key with a key-size of {0} was persisted in the container, ""{1}"".", _
RSAalg.KeySize, ContainerName)
Catch e As CryptographicException
Console.WriteLine(e.Message)
End Try
End Sub
Sub RSADeleteKeyInCSP(ByVal ContainerName As String)
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters
' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName
'Create a new instance of RSACryptoServiceProvider.
'Pass the CspParameters class to use the
'key in the container.
Dim RSAalg As New RSACryptoServiceProvider(cspParams)
'Delete the key entry in the container.
RSAalg.PersistKeyInCsp = False
'Call Clear to release resources and delete the key from the container.
RSAalg.Clear()
'Indicate that the key was persisted.
Console.WriteLine("The RSA key was deleted from the container, ""{0}"".", ContainerName)
Catch e As CryptographicException
Console.WriteLine(e.Message)
End Try
End Sub
Function RSAEncrypt(ByVal DataToEncrypt() As Byte, ByVal ContainerName As String, ByVal DoOAEPPadding As Boolean) As Byte()
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters
' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName
'Create a new instance of RSACryptoServiceProvider.
'Pass the CspParameters class to use the key
'from the key in the container.
Dim RSAalg As New RSACryptoServiceProvider(cspParams)
'Encrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
Return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding)
'Catch and display a CryptographicException
'to the console.
Catch e As CryptographicException
Console.WriteLine(e.Message)
Return Nothing
End Try
End Function
Function RSADecrypt(ByVal DataToDecrypt() As Byte, ByVal ContainerName As String, ByVal DoOAEPPadding As Boolean) As Byte()
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters
' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName
'Create a new instance of RSACryptoServiceProvider.
'Pass the CspParameters class to use the key
'from the key in the container.
Dim RSAalg As New RSACryptoServiceProvider(cspParams)
'Decrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
Return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding)
'Catch and display a CryptographicException
'to the console.
Catch e As CryptographicException
Console.WriteLine(e.ToString())
Return Nothing
End Try
End Function
End Module
Observações
Este construtor cria ou reutiliza um contentor chave especificado usando o KeyContainerName campo do parameters parâmetro.
Por defeito, este construtor cria um par de chaves Exchange adequado para encriptar chaves de sessão para que possam ser armazenadas e trocadas em segurança com outros utilizadores. A chave gerada corresponde a uma chave gerada usando o valor AT_KEYEXCHANGE usado na API Criptográfica de Microsoft não gerida (CAPI).
Pode criar um Signature par de chaves adequado para autenticar mensagens ou ficheiros (assinados digitalmente) definindo o KeyNumber campo do parameters parâmetro para o Signature valor. Este tipo de chave corresponde ao AT_SIGNATURE valor usado no CAPI.
Se criares um objeto RSACryptoServiceProvider com o valor Exchange especificado e depois criares outro objeto RSACryptoServiceProvider com o valor Signature especificado, ambas as chaves serão colocadas num único contentor se ambos os objetos especificarem o mesmo nome de contentor de chaves.
Para criar uma chave compatível com assinatura de nome forte usando a RSACryptoServiceProvider classe, deve criar um Signature par de chaves.
