X509Certificate.X509Certificate(String, SecureString) Constructor

Initializes a new instance of the X509Certificate class using a certificate file name and a password.

Namespace: System.Security.Cryptography.X509Certificates
Assembly: mscorlib (in mscorlib.dll)

public X509Certificate (
	string fileName,
	SecureString password
)
public X509Certificate (
	String fileName, 
	SecureString password
)
public function X509Certificate (
	fileName : String, 
	password : SecureString
)
Not applicable.

Parameters

fileName

The name of a certificate file.

password

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

Exception typeCondition

CryptographicException

An error with the certificate occurs. For example:

  • The certificate file does not exist.

  • The certificate is invalid.

  • The certificate's password is incorrect.

ArgumentException

The fileName parameter is a null reference (Nothing in Visual Basic).

ASN.1 DER is the only certificate format supported by this class. Calling this constructor with the correct password decrypts the private key and saves it to a key container.

Security noteSecurity Note:

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

If you create an X509Certificate certificate by specifying a PKCS7 signed file store for fileName, the X509Certificate is created for the certificate that signed the store rather than for any of the certificates within the store.

  • FileIOPermission  for permission to read the file described by the fileName parameter. Associated enumeration: Read Security action: Demand
  • KeyContainerPermission  for permission to create a key container. Associated enumeration: Create Security action: Demand

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

Community Additions

ADD
Show: