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CryptographicException Class

Definition

The exception that is thrown when an error occurs during a cryptographic operation.

public class CryptographicException : SystemException
public class CryptographicException : Exception
[System.Serializable]
public class CryptographicException : SystemException
[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public class CryptographicException : SystemException
Inheritance
CryptographicException
Inheritance
CryptographicException
Derived
Attributes

Examples

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

using System;
using System.Text;
using System.Security.Cryptography;
using System.Runtime.Serialization;

class CryptographicExceptionMembers
{
    [STAThread]
    public static void Main(string[] args)
    {
        CryptographicExceptionMembers testRun = 
            new CryptographicExceptionMembers();
        testRun.TestConstructors();
        testRun.ShowProperties();
        
        Console.WriteLine("This sample ended successfully; " + 
            " press Enter to exit.");
        Console.ReadLine();
    }

    // Test each public implementation of the CryptographicException
    // constructors.
    private void TestConstructors()
    {
        EmptyConstructor();
        IntConstructor();
        StringConstructor();
        StringExceptionConstructor();
        StringStringConstructor();
    }

    private void EmptyConstructor()
    {
        // Construct a CryptographicException with no parameters.
        CryptographicException cryptographicException =
            new CryptographicException();
        Console.WriteLine("Created an empty CryptographicException.");
    }

    private void IntConstructor()
    {
        // Construct a CryptographicException using the error code for an
        // unexpected operation exception.
        int exceptionNumber = unchecked((int)0x80131431);
        CryptographicException cryptographicException =
            new CryptographicException(exceptionNumber);
        Console.WriteLine("Created a CryptographicException with the " + 
            "following error code: " + exceptionNumber);
    }

    private void StringConstructor()
    {
        // Construct a CryptographicException using a custom error message.
        string errorMessage = ("Unexpected Operation exception.");
        CryptographicException cryptographicException =
            new CryptographicException(errorMessage);
        Console.WriteLine("Created a CryptographicException with the " + 
            "following error message: " + errorMessage);
    }

    private void StringExceptionConstructor()
    {
        // Construct a CryptographicException using a custom error message
        // and an inner exception.
        string errorMessage = ("The current operation is not supported.");
        NullReferenceException nullException = new NullReferenceException();
        CryptographicException cryptographicException = 
            new CryptographicException(errorMessage, nullException);
        Console.WriteLine("Created a CryptographicException with the " +
            "following error message: " + errorMessage + 
            " and the inner exception of " + nullException.ToString());
    }

    private void StringStringConstructor()
    {
        // Create a CryptographicException using a time format and a the 
        // current date.
        string dateFormat = "{0:t}";
        string timeStamp = (DateTime.Now.ToString());
        CryptographicException cryptographicException = 
            new CryptographicException(dateFormat, timeStamp);
        Console.WriteLine("Created a CryptographicException with (" +
            dateFormat + ") as the format and (" + timeStamp + 
            ") as the message.");
    }

    // Construct an invalid DSACryptoServiceProvider to throw a
    // CryptographicException for introspection.
    private void ShowProperties()
    {
        try 
        {
            // Create a DSACryptoServiceProvider with invalid provider type
            // code to throw a CryptographicException exception.
            CspParameters cspParams = new CspParameters(44);
            DSACryptoServiceProvider DSAalg = 
                new DSACryptoServiceProvider(cspParams);
        }
        catch (CryptographicException ex)
        {
            // Retrieve the link to the help file for the exception.
            string helpLink = ex.HelpLink;
            
            // Retrieve the exception that caused the current
            // CryptographicException exception.
            System.Exception innerException = ex.InnerException;
            string innerExceptionMessage = "";
            if (innerException != null)
            {
                innerExceptionMessage = innerException.ToString();
            }

            // Retrieve the message that describes the exception.
            string message = ex.Message;

            // Retrieve the name of the application that caused the exception.
            string exceptionSource = ex.Source;

            // Retrieve the call stack at the time the exception occurred.
            string stackTrace = ex.StackTrace;

            // Retrieve the method that threw the exception.
            System.Reflection.MethodBase targetSite = ex.TargetSite;
            string siteName = targetSite.Name;

            // Retrieve the entire exception as a single string.
            string entireException = ex.ToString();

            // GetObjectData
            setSerializationInfo(ref ex);

            // Get the root exception that caused the current
            // CryptographicException exception.
            System.Exception baseException = ex.GetBaseException();
            string baseExceptionMessage = "";
            if (baseException != null)
            {
                baseExceptionMessage = baseException.Message;
            }

            Console.WriteLine("Caught an expected exception:");
            Console.WriteLine(entireException);

            Console.WriteLine("\n");
            Console.WriteLine("Properties of the exception are as follows:");
            Console.WriteLine("Message: " + message);
            Console.WriteLine("Source: " + exceptionSource);
            Console.WriteLine("Stack trace: " + stackTrace);
            Console.WriteLine("Help link: " + helpLink);
            Console.WriteLine("Target site's name: " + siteName);
            Console.WriteLine("Base exception message: " + 
                baseExceptionMessage);
            Console.WriteLine("Inner exception message: " + 
                innerExceptionMessage);
        }
    }

    private void setSerializationInfo(ref CryptographicException ex)
    {
        // Insert information about the exception into a serialized object.
        FormatterConverter formatConverter = new FormatterConverter();
        SerializationInfo serializationInfo =
            new SerializationInfo(ex.GetType(), formatConverter);
        StreamingContext streamingContext =
            new StreamingContext(StreamingContextStates.All);

        ex.GetObjectData(serializationInfo,streamingContext);
    }
}
//
// This sample produces the following output:
//
// Created an empty CryptographicException.
// Created a CryptographicException with the following error code: -2146233295
// Created a CryptographicException with the following error message: 
// Unexpected Operation exception.
// Created a CryptographicException with the following error message: The
// current operation is not supported. and the inner exception of 
// System.NullReferenceException: Object reference not set to an instance of
// an object.
// Created a CryptographicException with ({0:t}) as the format and (2/24/2004
// 2:13:15 PM) as the message.
// Caught an expected exception:
// System.Security.Cryptography.CryptographicException: CryptoAPI
// cryptographic service provider (CSP) for this implementation could not be
// acquired. 
//  at System.Security.Cryptography.DSACryptoServiceProvider..ctor(Int32
// dwKeySize, CspParameters parameters)
//  at System.Security.Cryptography.DSACryptoServiceProvider..ctor(
// CspParametersparameters)
//  at CryptographicExceptionMembers.ShowProperties() in c:\inetpub\
// vssolutions\test\testbuild\consoleapplication1\class1.cs:line 109
//
//
// Properties of the exception are as follows:
// Message: CryptoAPI cryptographic service provider (CSP) for this
// implementation could not be acquired.
// Source: mscorlib
// Stack trace:    
//  at System.Security.Cryptography.DSACryptoServiceProvider..ctor(
// Int32 dwKeySize, CspParameters parameters) 
//  at System.Security.Cryptography.DSACryptoServiceProvider..ctor(
// CspParameters parameters)
//  at CryptographicExceptionMembers.ShowProperties() in c:\inetpub\
// vssolutions\test\testbuild\consoleapplication1\class1.cs:line 109
// Help link:
// Target site's name: .ctor
// Base exception message: CryptoAPI cryptographic service provider (CSP) for
// this implementation could not be acquired.
// Inner exception message:
// This sample ended successfully;  press Enter to exit.

Remarks

CryptographicException uses the HRESULT CORSEC_E_CRYPTO, unless an alternate error code is specified.

For a list of initial property values for an instance of CryptographicException, see the constructor.

Constructors

CryptographicException()

Initializes a new instance of the CryptographicException class with default properties.

CryptographicException(Int32)

Initializes a new instance of the CryptographicException class with the specified HRESULT error code.

CryptographicException(SerializationInfo, StreamingContext)
Obsolete.

Initializes a new instance of the CryptographicException class with serialized data.

CryptographicException(String, Exception)

Initializes a new instance of the CryptographicException class with a specified error message and a reference to the inner exception that is the cause of this exception.

CryptographicException(String, String)

Initializes a new instance of the CryptographicException class with a specified error message in the specified format.

CryptographicException(String)

Initializes a new instance of the CryptographicException class with a specified error message.

Properties

Data

Gets a collection of key/value pairs that provide additional user-defined information about the exception.

(Inherited from Exception)
HelpLink

Gets or sets a link to the help file associated with this exception.

(Inherited from Exception)
HResult

Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception.

(Inherited from Exception)
InnerException

Gets the Exception instance that caused the current exception.

(Inherited from Exception)
Message

Gets a message that describes the current exception.

(Inherited from Exception)
Source

Gets or sets the name of the application or the object that causes the error.

(Inherited from Exception)
StackTrace

Gets a string representation of the immediate frames on the call stack.

(Inherited from Exception)
TargetSite

Gets the method that throws the current exception.

(Inherited from Exception)

Methods

Equals(Object)

Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetBaseException()

When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions.

(Inherited from Exception)
GetHashCode()

Serves as the default hash function.

(Inherited from Object)
GetObjectData(SerializationInfo, StreamingContext)
Obsolete.

When overridden in a derived class, sets the SerializationInfo with information about the exception.

(Inherited from Exception)
GetType()

Gets the runtime type of the current instance.

(Inherited from Exception)
MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
ToString()

Creates and returns a string representation of the current exception.

(Inherited from Exception)

Events

SerializeObjectState
Obsolete.

Occurs when an exception is serialized to create an exception state object that contains serialized data about the exception.

(Inherited from Exception)

Applies to

Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 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 1.3, 1.4, 1.6, 2.0, 2.1

See also