X509Certificate.Import Method

Definition

Namespace:

System.Security.Cryptography.X509Certificates

Assemblies:

netstandard.dll, System.Security.Cryptography.dll

Populates an X509Certificate object.

Overloads

Import(String, String, X509KeyStorageFlags)	Obsolete. Populates the X509Certificate object with information from a certificate file, a password, and a X509KeyStorageFlags value.
Import(String, SecureString, X509KeyStorageFlags)	Obsolete. Populates an X509Certificate object with information from a certificate file, a password, and a key storage flag.
Import(Byte[], String, X509KeyStorageFlags)	Obsolete. Populates the X509Certificate object using data from a byte array, a password, and flags for determining how the private key is imported.
Import(Byte[])	Obsolete. Populates the X509Certificate object with data from a byte array.
Import(String)	Obsolete. Populates the X509Certificate object with information from a certificate file.
Import(Byte[], SecureString, X509KeyStorageFlags)	Obsolete. Populates an X509Certificate object using data from a byte array, a password, and a key storage flag.

Import(String, String, X509KeyStorageFlags)

Source:

X509Certificate.cs

Caution

X509Certificate and X509Certificate2 are immutable. Use X509CertificateLoader to create a new certificate.

Populates the X509Certificate object with information from a certificate file, a password, and a X509KeyStorageFlags value.

C#

[System.Obsolete("X509Certificate and X509Certificate2 are immutable. Use X509CertificateLoader to create a new certificate.", DiagnosticId="SYSLIB0026", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public virtual void Import(string fileName, string? password, System.Security.Cryptography.X509Certificates.X509KeyStorageFlags keyStorageFlags);

Parameters

fileName

String

The name of a certificate file represented as a string.

password

String

The password required to access the X.509 certificate data.

keyStorageFlags

X509KeyStorageFlags

A bitwise combination of the enumeration values that control where and how to import the certificate.

Attributes

ObsoleteAttribute

Exceptions

ArgumentException

The fileName parameter is null.

PlatformNotSupportedException

.NET Core and .NET 5+ only: In all cases.

Remarks

Important

Never hard-code a password within your source code. Hard-coded passwords can be retrieved from an assembly using the Ildasm.exe (IL Disassembler), a hex editor, or by simply opening the assembly in a text editor such as Notepad.exe.

Import(String, SecureString, X509KeyStorageFlags)

Source:

X509Certificate.cs

Caution

X509Certificate and X509Certificate2 are immutable. Use X509CertificateLoader to create a new certificate.

Important

This API is not CLS-compliant.

Populates an X509Certificate object with information from a certificate file, a password, and a key storage flag.

C#

[System.CLSCompliant(false)]
[System.Obsolete("X509Certificate and X509Certificate2 are immutable. Use X509CertificateLoader to create a new certificate.", DiagnosticId="SYSLIB0026", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public virtual void Import(string fileName, System.Security.SecureString? password, System.Security.Cryptography.X509Certificates.X509KeyStorageFlags keyStorageFlags);

Parameters

fileName

String

The name of a certificate file.

password

SecureString

The password required to access the X.509 certificate data.

keyStorageFlags

X509KeyStorageFlags

A bitwise combination of the enumeration values that control where and how to import the certificate.

Attributes

CLSCompliantAttribute ObsoleteAttribute

Exceptions

ArgumentException

The fileName parameter is null.

PlatformNotSupportedException

.NET Core and .NET 5+ only: In all cases.

Remarks

Important

Never hard code a password within your source code. Hard-coded passwords can be retrieved from an assembly using the Ildasm.exe (IL Disassembler), a hex editor, or by simply opening the assembly in a text editor such as Notepad.exe.

Import(Byte[], String, X509KeyStorageFlags)

Source:

X509Certificate.cs

Caution

X509Certificate and X509Certificate2 are immutable. Use X509CertificateLoader to create a new certificate.

Populates the X509Certificate object using data from a byte array, a password, and flags for determining how the private key is imported.

C#

[System.Obsolete("X509Certificate and X509Certificate2 are immutable. Use X509CertificateLoader to create a new certificate.", DiagnosticId="SYSLIB0026", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public virtual void Import(byte[] rawData, string? password, System.Security.Cryptography.X509Certificates.X509KeyStorageFlags keyStorageFlags);

Parameters

rawData

Byte[]

A byte array containing data from an X.509 certificate.

password

String

The password required to access the X.509 certificate data.

keyStorageFlags

X509KeyStorageFlags

A bitwise combination of the enumeration values that control where and how to import the certificate.

Attributes

ObsoleteAttribute

Exceptions

ArgumentException

The rawData parameter is null.

-or-

The length of the rawData parameter is 0.

PlatformNotSupportedException

.NET Core and .NET 5+ only: In all cases.

Remarks

This method can be used to populate an X509Certificate object using a password for the certificate represented by the byte array. The X509KeyStorageFlags value can be used to control where and how the private key is imported.

Import(Byte[])

Source:

X509Certificate.cs

Caution

X509Certificate and X509Certificate2 are immutable. Use X509CertificateLoader to create a new certificate.

Populates the X509Certificate object with data from a byte array.

C#

[System.Obsolete("X509Certificate and X509Certificate2 are immutable. Use X509CertificateLoader to create a new certificate.", DiagnosticId="SYSLIB0026", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public virtual void Import(byte[] rawData);

Parameters

rawData

Byte[]

A byte array containing data from an X.509 certificate.

Attributes

ObsoleteAttribute

Exceptions

ArgumentException

The rawData parameter is null.

-or-

The length of the rawData parameter is 0.

PlatformNotSupportedException

.NET Core and .NET 5+ only: In all cases.

Remarks

This method can be used to take the raw byte array of an X.509 certificate and populate the X509Certificate object with its associated values.

Import(String)

Source:

X509Certificate.cs

Caution

X509Certificate and X509Certificate2 are immutable. Use X509CertificateLoader to create a new certificate.

Populates the X509Certificate object with information from a certificate file.

C#

[System.Obsolete("X509Certificate and X509Certificate2 are immutable. Use X509CertificateLoader to create a new certificate.", DiagnosticId="SYSLIB0026", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public virtual void Import(string fileName);

Parameters

fileName

String

The name of a certificate file represented as a string.

Attributes

ObsoleteAttribute

Exceptions

ArgumentException

The fileName parameter is null.

PlatformNotSupportedException

.NET Core and .NET 5+ only: In all cases.

Examples

The following example loads an X.509 certificate from a file, calls the ToString method, and displays the results to the console.

C#

using System;
using System.Security.Cryptography.X509Certificates;

class X509
{

    static void Main()
    {

        // The path to the certificate.
        string Certificate = "Certificate.cer";

        // Load the certificate into an X509Certificate object.
        X509Certificate cert = new X509Certificate();

        cert.Import(Certificate);

        // Get the value.
        string resultsTrue = cert.ToString(true);

        // Display the value to the console.
        Console.WriteLine(resultsTrue);

        // Get the value.
        string resultsFalse = cert.ToString(false);

        // Display the value to the console.
        Console.WriteLine(resultsFalse);
    }
}

Remarks

This method uses a certificate file (such as a file with a .cer extension) that represents an X.509 certificate, and populates the X509Certificate object with the certificate that the file contains.

Import(Byte[], SecureString, X509KeyStorageFlags)

Source:

X509Certificate.cs

Caution

X509Certificate and X509Certificate2 are immutable. Use X509CertificateLoader to create a new certificate.

Important

This API is not CLS-compliant.

Populates an X509Certificate object using data from a byte array, a password, and a key storage flag.

C#

[System.CLSCompliant(false)]
[System.Obsolete("X509Certificate and X509Certificate2 are immutable. Use X509CertificateLoader to create a new certificate.", DiagnosticId="SYSLIB0026", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public virtual void Import(byte[] rawData, System.Security.SecureString? password, System.Security.Cryptography.X509Certificates.X509KeyStorageFlags keyStorageFlags);

Parameters

rawData

Byte[]

A byte array that contains data from an X.509 certificate.

password

SecureString

The password required to access the X.509 certificate data.

keyStorageFlags

X509KeyStorageFlags

A bitwise combination of the enumeration values that control where and how to import the certificate.

Attributes

CLSCompliantAttribute ObsoleteAttribute

Exceptions

ArgumentException

The rawData parameter is null.

-or-

The length of the rawData parameter is 0.

PlatformNotSupportedException

.NET Core and .NET 5+ only: In all cases.

Remarks

Important

Never hard code a password within your source code. Hard-coded passwords can be retrieved from an assembly using the Ildasm.exe (IL Disassembler), a hex editor, or by simply opening the assembly in a text editor such as Notepad.exe.