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CryptoConfig Class

Accesses the cryptography configuration information.

System.Object
  System.Security.Cryptography.CryptoConfig

Namespace:  System.Security.Cryptography
Assembly:  mscorlib (in mscorlib.dll)

[ComVisibleAttribute(true)]
public class CryptoConfig

The CryptoConfig type exposes the following members.

  NameDescription
Public methodCryptoConfigInitializes a new instance of the CryptoConfig class.
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  NameDescription
Public propertyStatic memberAllowOnlyFipsAlgorithmsIndicates whether the runtime should enforce the policy to create only Federal Information Processing Standard (FIPS) certified algorithms.
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  NameDescription
Public methodStatic memberAddAlgorithmAdds a set of names to algorithm mappings to be used for the current application domain.
Public methodStatic memberAddOIDAdds a set of names to object identifier (OID) mappings to be used for the current application domain.
Public methodStatic memberCreateFromName(String)Creates a new instance of the specified cryptographic object.
Public methodStatic memberCreateFromName(String, Object[])Creates a new instance of the specified cryptographic object with the specified arguments.
Public methodStatic memberEncodeOIDEncodes the specified object identifier (OID).
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodStatic memberMapNameToOIDGets the object identifier (OID) of the algorithm corresponding to the specified simple name.
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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The following table shows the simple names recognized by this class and the default algorithm implementations to which they map. Alternatively, you can map other implementations to these names, as described in Mapping Algorithm Names to Cryptography Classes.

Simple name

Algorithm implementation

3DES, Triple DES, TripleDES, System.Security.Cryptography.TripleDES

TripleDESCryptoServiceProvider

AES, System.Security.Cryptography.AesCryptoServiceProvider

AesCryptoServiceProvider

AesManaged, System.Security.Cryptography.AesManaged

AesManaged

System.Security.Cryptography.AsymmetricAlgorithm

RSACryptoServiceProvider

DES, System.Security.Cryptography.DES

DESCryptoServiceProvider

DSA, System.Security.Cryptography.DSA

DSACryptoServiceProvider

ECDH, ECDiffieHellman, ECDiffieHellmanCng, System.Security.Cryptography.ECDiffieHellmanCng

ECDiffieHellmanCng

ECDsa, ECDsaCng, System.Security.Cryptography.ECDsaCng

ECDsaCng

System.Security.Cryptography.HashAlgorithm

SHA1CryptoServiceProvider

HMAC, System.Security.Cryptography.HMAC

HMACSHA1

HMACMD5, System.Security.Cryptography.HMACMD5

HMACMD5

HMACRIPEMD160, System.Security.Cryptography.HMACRIPEMD160

HMACRIPEMD160

HMACSHA1, System.Security.Cryptography.HMACSHA1

HMACSHA1

HMACSHA256, System.Security.Cryptography.HMACSHA256

HMACSHA256

HMACSHA384, System.Security.Cryptography.HMACSHA384

HMACSHA384

HMACSHA512, System.Security.Cryptography.HMACSHA512

HMACSHA512

System.Security.Cryptography.KeyedHashAlgorithm

HMACSHA1

MACTripleDES, System.Security.Cryptography.MACTripleDES

MACTripleDES

MD5, System.Security.Cryptography.MD5

MD5CryptoServiceProvider

System.Security.Cryptography.MD5Cng

MD5Cng

RandomNumberGenerator

RNGCryptoServiceProvider

RC2, System.Security.Cryptography.RC2

RC2CryptoServiceProvider

Rijndael, System.Security.Cryptography.Rijndael

RijndaelManaged

RIPEMD160, RIPEMD-160, System.Security.Cryptography.RIPEMD160Managed

RIPEMD160Managed

RSA, System.Security.Cryptography.RSA

RSACryptoServiceProvider

SHA, SHA1, System.Security.Cryptography.SHA1

SHA1CryptoServiceProvider

System.Security.Cryptography.SHA1Cng

SHA1Cng

SHA256, SHA-256, System.Security.Cryptography.SHA256

SHA256Managed

System.Security.Cryptography.SHA256Cng

SHA256Cng

System.Security.Cryptography.SHA256CryptoServiceProvider

SHA256CryptoServiceProvider

SHA384, SHA-384, System.Security.Cryptography.SHA384

SHA384Managed

System.Security.Cryptography.SHA384Cng

SHA384Cng

System.Security.Cryptography.SHA384CryptoServiceProvider

SHA384CryptoServiceProvider

SHA512, SHA-512, System.Security.Cryptography.SHA512

SHA512Managed

System.Security.Cryptography.SHA512Cng

SHA512Cng

System.Security.Cryptography.SHA512CryptoServiceProvider

SHA512CryptoServiceProvider

System.Security.Cryptography.SymmetricAlgorithm

RijndaelManaged

The following code example demonstrates how to use members of the CryptoConfig class.

using System;
using System.Security.Cryptography;

class Members
{
    static void Main(string[] args)
    {
        // Create a CryptoConfig object to store configuration information.
        CryptoConfig cryptoConfig = new CryptoConfig();

        // Retrieve the class path for CryptoConfig. 
        string classDescription = cryptoConfig.ToString();

        // Create a new SHA1 provider.
        SHA1CryptoServiceProvider SHA1alg = 
            (SHA1CryptoServiceProvider)CryptoConfig.CreateFromName("SHA1");

        // Create an RSAParameters with the TestContainer key container.
        CspParameters parameters = new CspParameters();
        parameters.KeyContainerName = "TestContainer";
        Object[] argsArray = new Object[] {parameters};

        // Instantiate the RSA provider instance accessing the TestContainer 
        // key container.
        RSACryptoServiceProvider rsaProvider = (RSACryptoServiceProvider) 
            CryptoConfig.CreateFromName("RSA",argsArray);

        // Use the MapNameToOID method to get an object identifier   
        // (OID) from the string name of the SHA1 algorithm. 
        string sha1Oid = CryptoConfig.MapNameToOID("SHA1");

        // Encode the specified object identifier. 
        byte[] encodedMessage = CryptoConfig.EncodeOID(sha1Oid);

        // Display the results to the console.
        Console.WriteLine("** " + classDescription + " **");
        Console.WriteLine("Created an RSA provider " + 
            "with a KeyContainerName called " + parameters.KeyContainerName +
            ".");
        Console.WriteLine("Object identifier from the SHA1 name:" + sha1Oid);
        Console.WriteLine("The object identifier encoded: " + 
            System.Text.Encoding.ASCII.GetString(encodedMessage));
        Console.WriteLine("This sample completed successfully; " +
            "press Enter to exit.");
        Console.ReadLine();
    }
}
// 
// This sample produces the following output: 
// 
// ** System.Security.Cryptography.CryptoConfig ** 
// Created an RSA provider with a KeyContainerName called TestContainer. 
// Object identifier from the SHA1 name:1.3.14.3.2.26 
// The object identifier encoded: HH*((*H9 
// This sample completed successfully; press Enter to exit.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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