RC2.Create Yöntem
Tanım
Önemli
Bazı bilgiler ürünün ön sürümüyle ilgilidir ve sürüm öncesinde önemli değişiklikler yapılmış olabilir. Burada verilen bilgilerle ilgili olarak Microsoft açık veya zımni hiçbir garanti vermez.
Algoritmayı gerçekleştirmek için şifreleme nesnesinin bir örneğini RC2 oluşturur.
Aşırı Yüklemeler
Create() |
Algoritmayı gerçekleştirmek için şifreleme nesnesinin bir örneğini RC2 oluşturur. |
Create(String) |
Geçersiz.
Algoritmanın belirtilen uygulamasını gerçekleştirmek için şifreleme nesnesinin bir örneğini RC2 oluşturur. |
Create()
- Kaynak:
- RC2.cs
- Kaynak:
- RC2.cs
- Kaynak:
- RC2.cs
Algoritmayı gerçekleştirmek için şifreleme nesnesinin bir örneğini RC2 oluşturur.
public:
static System::Security::Cryptography::RC2 ^ Create();
public static System.Security.Cryptography.RC2 Create ();
[System.Runtime.Versioning.UnsupportedOSPlatform("android")]
public static System.Security.Cryptography.RC2 Create ();
[System.Runtime.Versioning.UnsupportedOSPlatform("android")]
[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public static System.Security.Cryptography.RC2 Create ();
static member Create : unit -> System.Security.Cryptography.RC2
[<System.Runtime.Versioning.UnsupportedOSPlatform("android")>]
static member Create : unit -> System.Security.Cryptography.RC2
[<System.Runtime.Versioning.UnsupportedOSPlatform("android")>]
[<System.Runtime.Versioning.UnsupportedOSPlatform("browser")>]
static member Create : unit -> System.Security.Cryptography.RC2
Public Shared Function Create () As RC2
Döndürülenler
Şifreleme nesnesinin örneği.
- Öznitelikler
Özel durumlar
Algoritma, Federal Bilgi İşleme Standartları (FIPS) modu etkinken kullanıldı, ancak FIPS uyumlu değil.
Örnekler
Aşağıdaki örnekte, dosyadaki verileri şifrelemek ve şifresini çözmek için RC2 nesnesinin nasıl oluşturulacağı ve kullanılacağı gösterilmektedir.
using namespace System;
using namespace System::IO;
using namespace System::Security::Cryptography;
using namespace System::Text;
void EncryptTextToFile(String^ text, String^ path, array<Byte>^ key, array<Byte>^ iv);
String^ DecryptTextFromFile(String^ path, array<Byte>^ key, array<Byte>^ iv);
int main()
{
try
{
array<Byte>^ key;
array<Byte>^ iv;
// Create a new RC2 object to generate a random key
// and initialization vector (IV).
{
RC2^ rc2;
try
{
rc2 = RC2::Create();
key = rc2->Key;
iv = rc2->IV;
}
finally
{
delete rc2;
}
}
// Create a string to encrypt.
String^ original = "Here is some data to encrypt.";
// The name/path of the file to write.
String^ filename = "CText.enc";
// Encrypt the string to a file.
EncryptTextToFile(original, filename, key, iv);
// Decrypt the file back to a string.
String^ decrypted = DecryptTextFromFile(filename, key, iv);
// Display the decrypted string to the console.
Console::WriteLine(decrypted);
}
catch (Exception^ e)
{
Console::WriteLine(e->Message);
}
}
void EncryptTextToFile(String^ text, String^ path, array<Byte>^ key, array<Byte>^ iv)
{
FileStream^ fStream = nullptr;
RC2^ rc2 = nullptr;
ICryptoTransform^ encryptor = nullptr;
CryptoStream^ cStream = nullptr;
try
{
// Create or open the specified file.
fStream = File::Open(path, FileMode::Create);
// Create a new RC2 object.
rc2 = RC2::Create();
// Create an RC2 encryptor from the key and IV
encryptor = rc2->CreateEncryptor(key, iv);
// Create a CryptoStream using the FileStream and encryptor
cStream = gcnew CryptoStream(fStream, encryptor, CryptoStreamMode::Write);
// Convert the provided string to a byte array.
array<Byte>^ toEncrypt = Encoding::UTF8->GetBytes(text);
// Write the byte array to the crypto stream.
cStream->Write(toEncrypt, 0, toEncrypt->Length);
}
catch (CryptographicException^ e)
{
Console::WriteLine("A Cryptographic error occurred: {0}", e->Message);
throw;
}
finally
{
if (cStream != nullptr)
delete cStream;
if (encryptor != nullptr)
delete encryptor;
if (rc2 != nullptr)
delete rc2;
if (fStream != nullptr)
delete fStream;
}
}
String^ DecryptTextFromFile(String^ path, array<Byte>^ key, array<Byte>^ iv)
{
FileStream^ fStream = nullptr;
RC2^ rc2 = nullptr;
ICryptoTransform^ decryptor = nullptr;
CryptoStream^ cStream = nullptr;
StreamReader^ reader = nullptr;
try
{
// Open the specified file
fStream = File::OpenRead(path);
// Create a new RC2 object.
rc2 = RC2::Create();
// Create an RC2 decryptor from the key and IV
decryptor = rc2->CreateDecryptor(key, iv);
// Create a CryptoStream using the FileStream and decryptor
cStream = gcnew CryptoStream(fStream, decryptor, CryptoStreamMode::Read);
// Create a StreamReader to turn the bytes back into text
reader = gcnew StreamReader(cStream, Encoding::UTF8);
// Read back all of the text from the StreamReader, which receives
// the decrypted bytes from the CryptoStream, which receives the
// encrypted bytes from the FileStream.
return reader->ReadToEnd();
}
catch (CryptographicException^ e)
{
Console::WriteLine("A Cryptographic error occurred: {0}", e->Message);
throw;
}
finally
{
if (cStream != nullptr)
delete cStream;
if (decryptor != nullptr)
delete decryptor;
if (rc2 != nullptr)
delete rc2;
if (fStream != nullptr)
delete fStream;
}
}
using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
class RC2Sample
{
static void Main()
{
try
{
byte[] key;
byte[] iv;
// Create a new RC2 object to generate a random key
// and initialization vector (IV).
using (RC2 rc2 = RC2.Create())
{
key = rc2.Key;
iv = rc2.IV;
}
// Create a string to encrypt.
string original = "Here is some data to encrypt.";
// The name/path of the file to write.
string filename = "CText.enc";
// Encrypt the string to a file.
EncryptTextToFile(original, filename, key, iv);
// Decrypt the file back to a string.
string decrypted = DecryptTextFromFile(filename, key, iv);
// Display the decrypted string to the console.
Console.WriteLine(decrypted);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
public static void EncryptTextToFile(string text, string path, byte[] key, byte[] iv)
{
try
{
// Create or open the specified file.
using (FileStream fStream = File.Open(path, FileMode.Create))
// Create a new RC2 object.
using (RC2 rc2 = RC2.Create())
// Create an RC2 encryptor from the key and IV
using (ICryptoTransform encryptor = rc2.CreateEncryptor(key, iv))
// Create a CryptoStream using the FileStream and encryptor
using (var cStream = new CryptoStream(fStream, encryptor, CryptoStreamMode.Write))
{
// Convert the provided string to a byte array.
byte[] toEncrypt = Encoding.UTF8.GetBytes(text);
// Write the byte array to the crypto stream.
cStream.Write(toEncrypt, 0, toEncrypt.Length);
}
}
catch (CryptographicException e)
{
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
throw;
}
}
public static string DecryptTextFromFile(string path, byte[] key, byte[] iv)
{
try
{
// Open the specified file
using (FileStream fStream = File.OpenRead(path))
// Create a new RC2 object.
using (RC2 rc2 = RC2.Create())
// Create an RC2 decryptor from the key and IV
using (ICryptoTransform decryptor = rc2.CreateDecryptor(key, iv))
// Create a CryptoStream using the FileStream and decryptor
using (var cStream = new CryptoStream(fStream, decryptor, CryptoStreamMode.Read))
// Create a StreamReader to turn the bytes back into text
using (StreamReader reader = new StreamReader(cStream, Encoding.UTF8))
{
// Read back all of the text from the StreamReader, which receives
// the decrypted bytes from the CryptoStream, which receives the
// encrypted bytes from the FileStream.
return reader.ReadToEnd();
}
}
catch (CryptographicException e)
{
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
throw;
}
}
}
Imports System.IO
Imports System.Security.Cryptography
Imports System.Text
Module RC2Sample
Sub Main()
Try
Dim key As Byte()
Dim iv As Byte()
' Create a new RC2 object to generate a key
' and initialization vector (IV).
Using rc2 As RC2 = RC2.Create
key = rc2.Key
iv = rc2.IV
End Using
' Create a string to encrypt.
Dim original As String = "Here is some data to encrypt."
' The name/path of the file to write.
Dim filename As String = "CText.enc"
' Encrypt the string to a file.
EncryptTextToFile(original, filename, key, iv)
' Decrypt the file back to a string.
Dim decrypted As String = DecryptTextFromFile(filename, key, iv)
' Display the decrypted string to the console.
Console.WriteLine(decrypted)
Catch e As Exception
Console.WriteLine(e.Message)
End Try
End Sub
Sub EncryptTextToFile(text As String, path As String, key As Byte(), iv As Byte())
Try
' Create or open the specified file.
' Create a new RC2 object,
' Create an RC2 encryptor from the key and IV,
' Create a CryptoStream using the MemoryStream And encryptor
Using fStream As FileStream = File.Open(path, FileMode.Create),
rc2 As RC2 = RC2.Create,
encryptor As ICryptoTransform = rc2.CreateEncryptor(key, iv),
cStream = New CryptoStream(fStream, encryptor, CryptoStreamMode.Write)
' Convert the passed string to a byte array.
Dim toEncrypt As Byte() = Encoding.UTF8.GetBytes(text)
' Write the byte array to the crypto stream.
cStream.Write(toEncrypt, 0, toEncrypt.Length)
End Using
Catch e As CryptographicException
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message)
Throw
End Try
End Sub
Function DecryptTextFromFile(path As String, key As Byte(), iv As Byte()) As String
Try
' Open the specified file
' Create a new RC2 object.
' Create an RC2 decryptor from the key and IV
' Create a CryptoStream using the MemoryStream and decryptor
' Create a StreamReader to turn the bytes back into text
Using mStream As FileStream = File.OpenRead(path),
rc2 As RC2 = RC2.Create,
decryptor As ICryptoTransform = rc2.CreateDecryptor(key, iv),
cStream = New CryptoStream(mStream, decryptor, CryptoStreamMode.Read),
reader = New StreamReader(cStream, Encoding.UTF8)
' Read back all of the text from the StreamReader, which receives
' the decrypted bytes from the CryptoStream, which receives the
' encrypted bytes from the FileStream.
Return reader.ReadToEnd()
End Using
Catch e As CryptographicException
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message)
Return Nothing
End Try
End Function
End Module
Aşağıdaki örnekte, bellekteki verileri şifrelemek ve şifresini çözmek için RC2 nesnesinin nasıl oluşturulacağı ve kullanılacağı gösterilmektedir.
using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
using namespace System::IO;
array<Byte>^ EncryptTextToMemory(String^ text, array<Byte>^ key, array<Byte>^ iv);
String^ DecryptTextFromMemory(array<Byte>^ encrypted, array<Byte>^ key, array<Byte>^ iv);
int main()
{
try
{
array<Byte>^ key;
array<Byte>^ iv;
// Create a new RC2 object to generate a random key
// and initialization vector (IV).
{
RC2^ rc2;
try
{
rc2 = RC2::Create();
key = rc2->Key;
iv = rc2->IV;
}
finally
{
delete rc2;
}
}
// Create a string to encrypt.
String^ original = "Here is some data to encrypt.";
// Encrypt the string to an in-memory buffer.
array<Byte>^ encrypted = EncryptTextToMemory(original, key, iv);
// Decrypt the buffer back to a string.
String^ decrypted = DecryptTextFromMemory(encrypted, key, iv);
// Display the decrypted string to the console.
Console::WriteLine(decrypted);
}
catch (Exception^ e)
{
Console::WriteLine(e->Message);
}
}
array<Byte>^ EncryptTextToMemory(String^ text, array<Byte>^ key, array<Byte>^ iv)
{
MemoryStream^ mStream = nullptr;
try
{
// Create a MemoryStream.
mStream = gcnew MemoryStream;
RC2^ rc2 = nullptr;
ICryptoTransform^ encryptor = nullptr;
CryptoStream^ cStream = nullptr;
try
{
// Create a new RC2 object.
rc2 = RC2::Create();
// Create an RC2 encryptor from the key and IV
encryptor = rc2->CreateEncryptor(key, iv);
// Create a CryptoStream using the MemoryStream and encryptor
cStream = gcnew CryptoStream(mStream, encryptor, CryptoStreamMode::Write);
// Convert the provided string to a byte array.
array<Byte>^ toEncrypt = Encoding::UTF8->GetBytes(text);
// Write the byte array to the crypto stream.
cStream->Write(toEncrypt, 0, toEncrypt->Length);
// Disposing the CryptoStream completes the encryption and flushes the stream.
delete cStream;
// Get an array of bytes from the MemoryStream that holds the encrypted data.
array<Byte>^ ret = mStream->ToArray();
// Return the encrypted buffer.
return ret;
}
finally
{
if (cStream != nullptr)
delete cStream;
if (encryptor != nullptr)
delete encryptor;
if (rc2 != nullptr)
delete rc2;
}
}
catch (CryptographicException^ e)
{
Console::WriteLine("A Cryptographic error occurred: {0}", e->Message);
throw;
}
finally
{
if (mStream != nullptr)
delete mStream;
}
}
String^ DecryptTextFromMemory(array<Byte>^ encrypted, array<Byte>^ key, array<Byte>^ iv)
{
MemoryStream^ mStream = nullptr;
RC2^ rc2 = nullptr;
ICryptoTransform^ decryptor = nullptr;
CryptoStream^ cStream = nullptr;
try
{
// Create buffer to hold the decrypted data.
// RC2-encrypted data will always be slightly bigger than the decrypted data.
array<Byte>^ decrypted = gcnew array<Byte>(encrypted->Length);
Int32 offset = 0;
// Create a new MemoryStream using the provided array of encrypted data.
mStream = gcnew MemoryStream(encrypted);
// Create a new RC2 object.
rc2 = RC2::Create();
// Create an RC2 decryptor from the key and IV
decryptor = rc2->CreateDecryptor(key, iv);
// Create a CryptoStream using the MemoryStream and decryptor
cStream = gcnew CryptoStream(mStream, decryptor, CryptoStreamMode::Read);
// Keep reading from the CryptoStream until it finishes (returns 0).
Int32 read = 1;
while (read > 0)
{
read = cStream->Read(decrypted, offset, decrypted->Length - offset);
offset += read;
}
// Convert the buffer into a string and return it.
return Encoding::UTF8->GetString(decrypted, 0, offset);
}
catch (CryptographicException^ e)
{
Console::WriteLine("A Cryptographic error occurred: {0}", e->Message);
throw;
}
finally
{
if (cStream != nullptr)
delete cStream;
if (decryptor != nullptr)
delete decryptor;
if (rc2 != nullptr)
delete rc2;
if (mStream != nullptr)
delete mStream;
}
}
using System;
using System.Security.Cryptography;
using System.Text;
using System.IO;
class RC2Sample2
{
static void Main()
{
try
{
byte[] key;
byte[] iv;
// Create a new RC2 object to generate a random key
// and initialization vector (IV).
using (RC2 rc2 = RC2.Create())
{
key = rc2.Key;
iv = rc2.IV;
}
// Create a string to encrypt.
string original = "Here is some data to encrypt.";
// Encrypt the string to an in-memory buffer.
byte[] encrypted = EncryptTextToMemory(original, key, iv);
// Decrypt the buffer back to a string.
string decrypted = DecryptTextFromMemory(encrypted, key, iv);
// Display the decrypted string to the console.
Console.WriteLine(decrypted);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
public static byte[] EncryptTextToMemory(string text, byte[] key, byte[] iv)
{
try
{
// Create a MemoryStream.
using (MemoryStream mStream = new MemoryStream())
{
// Create a new RC2 object.
using (RC2 rc2 = RC2.Create())
// Create an RC2 encryptor from the key and IV
using (ICryptoTransform encryptor = rc2.CreateEncryptor(key, iv))
// Create a CryptoStream using the MemoryStream and encryptor
using (var cStream = new CryptoStream(mStream, encryptor, CryptoStreamMode.Write))
{
// Convert the provided string to a byte array.
byte[] toEncrypt = Encoding.UTF8.GetBytes(text);
// Write the byte array to the crypto stream and flush it.
cStream.Write(toEncrypt, 0, toEncrypt.Length);
// Ending the using statement for the CryptoStream completes the encryption.
}
// Get an array of bytes from the MemoryStream that holds the encrypted data.
byte[] ret = mStream.ToArray();
// Return the encrypted buffer.
return ret;
}
}
catch (CryptographicException e)
{
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
throw;
}
}
public static string DecryptTextFromMemory(byte[] encrypted, byte[] key, byte[] iv)
{
try
{
// Create a buffer to hold the decrypted data.
// RC2-encrypted data will always be slightly bigger than the decrypted data.
byte[] decrypted = new byte[encrypted.Length];
int offset = 0;
// Create a new MemoryStream using the provided array of encrypted data.
using (MemoryStream mStream = new MemoryStream(encrypted))
{
// Create a new RC2 object.
using (RC2 rc2 = RC2.Create())
// Create an RC2 decryptor from the key and IV
using (ICryptoTransform decryptor = rc2.CreateDecryptor(key, iv))
// Create a CryptoStream using the MemoryStream and decryptor
using (var cStream = new CryptoStream(mStream, decryptor, CryptoStreamMode.Read))
{
// Keep reading from the CryptoStream until it finishes (returns 0).
int read = 1;
while (read > 0)
{
read = cStream.Read(decrypted, offset, decrypted.Length - offset);
offset += read;
}
}
}
// Convert the buffer into a string and return it.
return Encoding.UTF8.GetString(decrypted, 0, offset);
}
catch (CryptographicException e)
{
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
throw;
}
}
}
Imports System.Security.Cryptography
Imports System.Text
Imports System.IO
Module RC2Sample
Sub Main()
Try
Dim key As Byte()
Dim iv As Byte()
' Create a new RC2 object to generate a key
' and initialization vector (IV).
Using rc2 As RC2 = RC2.Create
key = rc2.Key
iv = rc2.IV
End Using
' Create a string to encrypt.
Dim original As String = "Here is some data to encrypt."
' Encrypt the string to an in-memory buffer.
Dim encrypted As Byte() = EncryptTextToMemory(original, key, iv)
' Decrypt the buffer back to a string.
Dim decrypted As String = DecryptTextFromMemory(encrypted, key, iv)
' Display the decrypted string to the console.
Console.WriteLine(decrypted)
Catch e As Exception
Console.WriteLine(e.Message)
End Try
End Sub
Function EncryptTextToMemory(text As String, key As Byte(), iv As Byte()) As Byte()
Try
' Create a MemoryStream.
Using mStream As New MemoryStream
' Create a new RC2 object,
' Create an RC2 encryptor from the key and IV,
' Create a CryptoStream using the MemoryStream And encryptor
Using rc2 As RC2 = RC2.Create,
encryptor As ICryptoTransform = rc2.CreateEncryptor(key, iv),
cStream = New CryptoStream(mStream, encryptor, CryptoStreamMode.Write)
' Convert the passed string to a byte array.
Dim toEncrypt As Byte() = Encoding.UTF8.GetBytes(text)
' Write the byte array to the crypto stream and flush it.
cStream.Write(toEncrypt, 0, toEncrypt.Length)
' Ending the using block for the CryptoStream completes the encryption.
End Using
' Get an array of bytes from the MemoryStream that holds the encrypted data.
Dim ret As Byte() = mStream.ToArray()
' Return the encrypted buffer.
Return ret
End Using
Catch e As CryptographicException
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message)
Throw
End Try
End Function
Function DecryptTextFromMemory(encrypted As Byte(), key As Byte(), iv As Byte()) As String
Try
' Create a buffer to hold the decrypted data.
' RC2-encrypted data will always be slightly bigger than the decrypted data.
Dim decrypted(encrypted.Length - 1) As Byte
Dim offset As Integer = 0
' Create a new MemoryStream using the provided array of encrypted data.
' Create a new RC2 object.
' Create an RC2 decryptor from the key and IV
' Create a CryptoStream using the MemoryStream and decryptor
Using mStream As New MemoryStream(encrypted),
rc2 As RC2 = RC2.Create,
decryptor As ICryptoTransform = rc2.CreateDecryptor(key, iv),
cStream = New CryptoStream(mStream, decryptor, CryptoStreamMode.Read)
' Keep reading from the CryptoStream until it finishes (returns 0).
Dim read As Integer = 1
While (read > 0)
read = cStream.Read(decrypted, offset, decrypted.Length - offset)
offset += read
End While
End Using
' Convert the buffer into a string and return it.
Return New ASCIIEncoding().GetString(decrypted, 0, offset)
Catch e As CryptographicException
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message)
Return Nothing
End Try
End Function
End Module
Açıklamalar
Verileri şifrelemek ve şifresini çözmek için kullanabileceğiniz RC2 sınıfının bir örneğini oluşturmak için bu yöntemi kullanın.
Ayrıca bkz.
Şunlara uygulanır
Create(String)
- Kaynak:
- RC2.cs
- Kaynak:
- RC2.cs
- Kaynak:
- RC2.cs
Dikkat
Cryptographic factory methods accepting an algorithm name are obsolete. Use the parameterless Create factory method on the algorithm type instead.
Algoritmanın belirtilen uygulamasını gerçekleştirmek için şifreleme nesnesinin bir örneğini RC2 oluşturur.
public:
static System::Security::Cryptography::RC2 ^ Create(System::String ^ AlgName);
public static System.Security.Cryptography.RC2? Create (string AlgName);
[System.Obsolete("Cryptographic factory methods accepting an algorithm name are obsolete. Use the parameterless Create factory method on the algorithm type instead.", DiagnosticId="SYSLIB0045", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public static System.Security.Cryptography.RC2? Create (string AlgName);
public static System.Security.Cryptography.RC2 Create (string AlgName);
static member Create : string -> System.Security.Cryptography.RC2
[<System.Obsolete("Cryptographic factory methods accepting an algorithm name are obsolete. Use the parameterless Create factory method on the algorithm type instead.", DiagnosticId="SYSLIB0045", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
static member Create : string -> System.Security.Cryptography.RC2
Public Shared Function Create (AlgName As String) As RC2
Parametreler
Döndürülenler
Şifreleme nesnesinin örneği.
- Öznitelikler
Özel durumlar
parametresi tarafından algName
açıklanan algoritma Federal Bilgi İşleme Standartları (FIPS) modu etkinken kullanılmıştır, ancak FIPS uyumlu değildir.