RC2.Create 메서드
정의
중요
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알고리즘을 수행할 암호화 개체의 인스턴스를 RC2 만듭니다.
오버로드
| Name | Description |
|---|---|
| Create() |
알고리즘을 수행할 암호화 개체의 인스턴스를 RC2 만듭니다. |
| Create(String) |
사용되지 않음.
알고리즘의 지정된 구현을 수행하는 암호화 개체의 인스턴스를 RC2 만듭니다. |
Create()
- Source:
- RC2.cs
- Source:
- RC2.cs
- Source:
- RC2.cs
- Source:
- RC2.cs
- Source:
- RC2.cs
알고리즘을 수행할 암호화 개체의 인스턴스를 RC2 만듭니다.
public:
static System::Security::Cryptography::RC2 ^ Create();[System.Runtime.Versioning.UnsupportedOSPlatform("android")]
[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
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")>]
static member Create : unit -> System.Security.Cryptography.RC2static member Create : unit -> System.Security.Cryptography.RC2[<System.Runtime.Versioning.UnsupportedOSPlatform("android")>]
static member Create : unit -> System.Security.Cryptography.RC2Public Shared Function Create () As RC2반품
암호화 개체의 인스턴스입니다.
- 특성
예외
이 알고리즘은 FIPS(Federal Information Processing Standards) 모드를 사용하도록 설정된 상태에서 사용되었지만 FIPS와 호환되지 않습니다.
예제
다음 예제에서는 RC2 개체를 만들고 사용하여 파일의 데이터를 암호화하고 암호 해독하는 방법을 보여 있습니다.
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
다음 예제에서는 RC2 개체를 만들고 사용하여 메모리의 데이터를 암호화하고 암호 해독하는 방법을 보여 있습니다.
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
설명
이 메서드를 사용하여 데이터를 암호화하고 암호 해독하는 데 사용할 수 있는 RC2 클래스의 인스턴스를 만듭니다.
추가 정보
적용 대상
Create(String)
- Source:
- RC2.cs
- Source:
- RC2.cs
- Source:
- RC2.cs
- Source:
- RC2.cs
- Source:
- RC2.cs
주의
Cryptographic factory methods accepting an algorithm name are obsolete. Use the parameterless Create factory method on the algorithm type instead.
알고리즘의 지정된 구현을 수행하는 암호화 개체의 인스턴스를 RC2 만듭니다.
public:
static System::Security::Cryptography::RC2 ^ Create(System::String ^ AlgName);[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("The default algorithm implementations might be removed, use strong type references like 'RSA.Create()' instead.")]
[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);[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("The default algorithm implementations might be removed, use strong type references like 'RSA.Create()' instead.")]
public static System.Security.Cryptography.RC2? Create(string AlgName);public static System.Security.Cryptography.RC2 Create(string AlgName);[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("The default algorithm implementations might be removed, use strong type references like 'RSA.Create()' instead.")>]
[<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.RC2static member Create : string -> System.Security.Cryptography.RC2[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("The default algorithm implementations might be removed, use strong type references like 'RSA.Create()' instead.")>]
static member Create : string -> System.Security.Cryptography.RC2Public Shared Function Create (AlgName As String) As RC2매개 변수
반품
암호화 개체의 인스턴스입니다.
- 특성
예외
매개 변수에 의해 설명된 AlgName 알고리즘은 FIPS(Federal Information Processing Standards) 모드를 사용하도록 설정된 상태에서 사용되었지만 FIPS와 호환되지 않습니다.
