PasswordDeriveBytes Constructors

Definition

Namespace:

System.Security.Cryptography

Assembly:

System.Security.Cryptography.dll

Initializes a new instance of the PasswordDeriveBytes class.

Overloads

PasswordDeriveBytes(Byte[], Byte[])	Initializes a new instance of the PasswordDeriveBytes class specifying the password and key salt to use to derive the key.
PasswordDeriveBytes(String, Byte[])	Initializes a new instance of the PasswordDeriveBytes class with the password and key salt to use to derive the key.
PasswordDeriveBytes(Byte[], Byte[], CspParameters)	Initializes a new instance of the PasswordDeriveBytes class specifying the password, key salt, and cryptographic service provider (CSP) to use to derive the key.
PasswordDeriveBytes(String, Byte[], CspParameters)	Initializes a new instance of the PasswordDeriveBytes class with the password, key salt, and cryptographic service provider (CSP) parameters to use to derive the key.
PasswordDeriveBytes(Byte[], Byte[], String, Int32)	Initializes a new instance of the PasswordDeriveBytes class specifying the password, key salt, hash name, and iterations to use to derive the key.
PasswordDeriveBytes(String, Byte[], String, Int32)	Initializes a new instance of the PasswordDeriveBytes class with the password, key salt, hash name, and number of iterations to use to derive the key.
PasswordDeriveBytes(Byte[], Byte[], String, Int32, CspParameters)	Initializes a new instance of the PasswordDeriveBytes class specifying the password, key salt, hash name, iterations, and cryptographic service provider (CSP) to use to derive the key.
PasswordDeriveBytes(String, Byte[], String, Int32, CspParameters)	Initializes a new instance of the PasswordDeriveBytes class with the password, key salt, hash name, number of iterations, and cryptographic service provider (CSP) parameters to use to derive the key.

PasswordDeriveBytes(Byte[], Byte[])

Source:

PasswordDeriveBytes.cs

Initializes a new instance of the PasswordDeriveBytes class specifying the password and key salt to use to derive the key.

public:
 PasswordDeriveBytes(cli::array <System::Byte> ^ password, cli::array <System::Byte> ^ salt);

public PasswordDeriveBytes (byte[] password, byte[]? salt);

new System.Security.Cryptography.PasswordDeriveBytes : byte[] * byte[] -> System.Security.Cryptography.PasswordDeriveBytes

Public Sub New (password As Byte(), salt As Byte())

Parameters

password

Byte[]

The password to derive the key for.

salt

Byte[]

The key salt to use to derive the key.

Examples

The following code example creates a key from a password using the PasswordDeriveBytes class.

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;

// Generates a random salt value of the specified length.
array<Byte>^ CreateRandomSalt(int length)
{
    // Create a buffer
    array<Byte>^ randomBytes;

    if (length >= 1)
    {
        randomBytes = gcnew array <Byte>(length);
    }
    else
    {
        randomBytes = gcnew array <Byte>(1);
    }

    // Create a new RandomNumberGenerator.
    RandomNumberGenerator^ randomNumberGenerator =
        RandomNumberGenerator::Create();

    // Fill the buffer with random bytes.
    randomNumberGenerator->GetBytes(randomBytes);

    // return the bytes.
    return randomBytes;
}

// Clears the bytes in a buffer so they can't later be read from memory.
void ClearBytes(array<Byte>^ buffer)
{
    // Check arguments.
    if (buffer == nullptr)
    {
        throw gcnew ArgumentNullException("buffer");
    }

    // Set each byte in the buffer to 0.
    for (int x = 0; x <= buffer->Length - 1; x++)
    {
        buffer[x] = 0;
    }
}

int main(array<String^>^ args)
{

    // Get a password from the user.
    Console::WriteLine("Enter a password to produce a key:");

    // Security Note: Never hard-code a password within your
    // source code.  Hard-coded passwords can be retrieved
    // from a compiled assembly.
    array<Byte>^ password = Encoding::Unicode->GetBytes(Console::ReadLine());

    array<Byte>^ randomSalt = CreateRandomSalt(7);

    // Create a TripleDESCryptoServiceProvider object.
    TripleDESCryptoServiceProvider^ cryptoDESProvider =
        gcnew TripleDESCryptoServiceProvider();

    try
    {
        Console::WriteLine("Creating a key with PasswordDeriveBytes...");

        // Create a PasswordDeriveBytes object and then create
        // a TripleDES key from the password and salt.
        PasswordDeriveBytes^ passwordDeriveBytes = gcnew PasswordDeriveBytes
            (password->ToString(), randomSalt);

       // Create the key and set it to the Key property
       // of the TripleDESCryptoServiceProvider object.
       // This example uses the SHA1 algorithm.
       // Due to collision problems with SHA1, Microsoft recommends SHA256 or better.
        cryptoDESProvider->Key = passwordDeriveBytes->CryptDeriveKey
            ("TripleDES", "SHA1", 192, cryptoDESProvider->IV);
        Console::WriteLine("Operation complete.");
    }
    catch (Exception^ ex)
    {
        Console::WriteLine(ex->Message);
    }
    finally
    {
        // Clear the buffers
        ClearBytes(password);
        ClearBytes(randomSalt);

        // Clear the key.
        cryptoDESProvider->Clear();
    }

    Console::ReadLine();
}

using System;
using System.Security.Cryptography;
using System.Text;

public class PasswordDerivedBytesExample
{

    public static void Main(String[] args)
    {

        // Get a password from the user.
        Console.WriteLine("Enter a password to produce a key:");

        byte[] pwd = Encoding.Unicode.GetBytes(Console.ReadLine());

        byte[] salt = CreateRandomSalt(7);

        // Create a TripleDESCryptoServiceProvider object.
        TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();

        try
        {
            Console.WriteLine("Creating a key with PasswordDeriveBytes...");

            // Create a PasswordDeriveBytes object and then create
            // a TripleDES key from the password and salt.
            PasswordDeriveBytes pdb = new PasswordDeriveBytes(pwd, salt);


            // Create the key and set it to the Key property
            // of the TripleDESCryptoServiceProvider object.
            // This example uses the SHA1 algorithm.
            // Due to collision problems with SHA1, Microsoft recommends SHA256 or better.
            tdes.Key = pdb.CryptDeriveKey("TripleDES", "SHA1", 192, tdes.IV);


            Console.WriteLine("Operation complete.");
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }
        finally
        {
            // Clear the buffers
            ClearBytes(pwd);
            ClearBytes(salt);

            // Clear the key.
            tdes.Clear();
        }

        Console.ReadLine();
    }

    //////////////////////////////////////////////////////////
    // Helper methods:
    // CreateRandomSalt: Generates a random salt value of the
    //                   specified length.
    //
    // ClearBytes: Clear the bytes in a buffer so they can't
    //             later be read from memory.
    //////////////////////////////////////////////////////////

    public static byte[] CreateRandomSalt(int length)
    {
        // Create a buffer
        byte[] randBytes;

        if (length >= 1)
        {
            randBytes = new byte[length];
        }
        else
        {
            randBytes = new byte[1];
        }

        using (RandomNumberGenerator rng = RandomNumberGenerator.Create())
        {
            // Fill the buffer with random bytes.
            rng.GetBytes(randBytes);
        }

        // return the bytes.
        return randBytes;
    }

    public static void ClearBytes(byte[] buffer)
    {
        // Check arguments.
        if (buffer == null)
        {
            throw new ArgumentException("buffer");
        }

        // Set each byte in the buffer to 0.
        for (int x = 0; x < buffer.Length; x++)
        {
            buffer[x] = 0;
        }
    }
}

Imports System.Security.Cryptography
Imports System.Text



Module PasswordDerivedBytesExample


    Sub Main(ByVal args() As String)

        ' Get a password from the user.
        Console.WriteLine("Enter a password to produce a key:")

        Dim pwd As Byte() = Encoding.Unicode.GetBytes(Console.ReadLine())

        Dim salt As Byte() = CreateRandomSalt(7)

        ' Create a TripleDESCryptoServiceProvider object.
        Dim tdes As New TripleDESCryptoServiceProvider()

        Try
            Console.WriteLine("Creating a key with PasswordDeriveBytes...")

            ' Create a PasswordDeriveBytes object and then create 
            ' a TripleDES key from the password and salt.
            Dim pdb As New PasswordDeriveBytes(pwd, salt)


            ' Create the key and set it to the Key property
            ' of the TripleDESCryptoServiceProvider object.
            ' This example uses the SHA1 algorithm.
            ' Due to collision problems with SHA1, Microsoft recommends SHA256 or better.
            tdes.Key = pdb.CryptDeriveKey("TripleDES", "SHA1", 192, tdes.IV)


            Console.WriteLine("Operation complete.")
        Catch e As Exception
            Console.WriteLine(e.Message)
        Finally
            ' Clear the buffers
            ClearBytes(pwd)
            ClearBytes(salt)

            ' Clear the key.
            tdes.Clear()
        End Try

        Console.ReadLine()

    End Sub


    '********************************************************
    '* Helper methods:
    '* createRandomSalt: Generates a random salt value of the 
    '*                   specified length.  
    '*
    '* clearBytes: Clear the bytes in a buffer so they can't 
    '*             later be read from memory.
    '********************************************************
    Function CreateRandomSalt(ByVal length As Integer) As Byte()
        ' Create a buffer
        Dim randBytes() As Byte

        If length >= 1 Then
            randBytes = New Byte(length) {}
        Else
            randBytes = New Byte(0) {}
        End If

        ' Create a new RandomNumberGenerator.
        Using rand As RandomNumberGenerator = RandomNumberGenerator.Create()
            ' Fill the buffer with random bytes.
            rand.GetBytes(randBytes)
        End Using

        ' return the bytes.
        Return randBytes

    End Function


    Sub ClearBytes(ByVal buffer() As Byte)
        ' Check arguments.
        If buffer Is Nothing Then
            Throw New ArgumentException("buffer")
        End If

        ' Set each byte in the buffer to 0.
        Dim x As Integer
        For x = 0 To buffer.Length - 1
            buffer(x) = 0
        Next x

    End Sub
End Module

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 up the assembly in a text editor such as Notepad.exe.

See also

• Cryptographic Services

PasswordDeriveBytes(String, Byte[])

Source:

PasswordDeriveBytes.cs

Initializes a new instance of the PasswordDeriveBytes class with the password and key salt to use to derive the key.

public:
 PasswordDeriveBytes(System::String ^ strPassword, cli::array <System::Byte> ^ rgbSalt);

public PasswordDeriveBytes (string strPassword, byte[]? rgbSalt);

new System.Security.Cryptography.PasswordDeriveBytes : string * byte[] -> System.Security.Cryptography.PasswordDeriveBytes

Public Sub New (strPassword As String, rgbSalt As Byte())

Parameters

strPassword

String

The password for which to derive the key.

rgbSalt

Byte[]

The key salt to use to derive the key.

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) tool, a hex editor, or by simply opening up the assembly in a text editor like notepad.exe.

See also

• Cryptographic Services

PasswordDeriveBytes(Byte[], Byte[], CspParameters)

Source:

PasswordDeriveBytes.cs

Initializes a new instance of the PasswordDeriveBytes class specifying the password, key salt, and cryptographic service provider (CSP) to use to derive the key.

public:
 PasswordDeriveBytes(cli::array <System::Byte> ^ password, cli::array <System::Byte> ^ salt, System::Security::Cryptography::CspParameters ^ cspParams);

public PasswordDeriveBytes (byte[] password, byte[]? salt, System.Security.Cryptography.CspParameters? cspParams);

new System.Security.Cryptography.PasswordDeriveBytes : byte[] * byte[] * System.Security.Cryptography.CspParameters -> System.Security.Cryptography.PasswordDeriveBytes

Public Sub New (password As Byte(), salt As Byte(), cspParams As CspParameters)

Parameters

password

Byte[]

The password to derive the key for.

salt

Byte[]

The key salt to use to derive the key.

cspParams

CspParameters

The cryptographic service provider (CSP) parameters for the operation.

Examples

The following code example creates a key from a password using the PasswordDeriveBytes class.

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;

// Generates a random salt value of the specified length.
array<Byte>^ CreateRandomSalt(int length)
{
    // Create a buffer
    array<Byte>^ randomBytes;

    if (length >= 1)
    {
        randomBytes = gcnew array <Byte>(length);
    }
    else
    {
        randomBytes = gcnew array <Byte>(1);
    }

    // Create a new RandomNumberGenerator.
    RandomNumberGenerator^ randomNumberGenerator =
        RandomNumberGenerator::Create();

    // Fill the buffer with random bytes.
    randomNumberGenerator->GetBytes(randomBytes);

    // return the bytes.
    return randomBytes;
}

// Clears the bytes in a buffer so they can't later be read from memory.
void ClearBytes(array<Byte>^ buffer)
{
    // Check arguments.
    if (buffer == nullptr)
    {
        throw gcnew ArgumentNullException("buffer");
    }

    // Set each byte in the buffer to 0.
    for (int x = 0; x <= buffer->Length - 1; x++)
    {
        buffer[x] = 0;
    }
}

int main(array<String^>^ args)
{

    // Get a password from the user.
    Console::WriteLine("Enter a password to produce a key:");

    // Security Note: Never hard-code a password within your
    // source code.  Hard-coded passwords can be retrieved
    // from a compiled assembly.
    array<Byte>^ password = Encoding::Unicode->GetBytes(Console::ReadLine());

    array<Byte>^ randomSalt = CreateRandomSalt(7);

    // Create a TripleDESCryptoServiceProvider object.
    TripleDESCryptoServiceProvider^ cryptoDESProvider =
        gcnew TripleDESCryptoServiceProvider();

    try
    {
        Console::WriteLine("Creating a key with PasswordDeriveBytes...");

        // Create a PasswordDeriveBytes object and then create
        // a TripleDES key from the password and salt.
        PasswordDeriveBytes^ passwordDeriveBytes = gcnew PasswordDeriveBytes
            (password->ToString(), randomSalt);

       // Create the key and set it to the Key property
       // of the TripleDESCryptoServiceProvider object.
       // This example uses the SHA1 algorithm.
       // Due to collision problems with SHA1, Microsoft recommends SHA256 or better.
        cryptoDESProvider->Key = passwordDeriveBytes->CryptDeriveKey
            ("TripleDES", "SHA1", 192, cryptoDESProvider->IV);
        Console::WriteLine("Operation complete.");
    }
    catch (Exception^ ex)
    {
        Console::WriteLine(ex->Message);
    }
    finally
    {
        // Clear the buffers
        ClearBytes(password);
        ClearBytes(randomSalt);

        // Clear the key.
        cryptoDESProvider->Clear();
    }

    Console::ReadLine();
}

using System;
using System.Security.Cryptography;
using System.Text;

public class PasswordDerivedBytesExample
{

    public static void Main(String[] args)
    {

        // Get a password from the user.
        Console.WriteLine("Enter a password to produce a key:");

        byte[] pwd = Encoding.Unicode.GetBytes(Console.ReadLine());

        byte[] salt = CreateRandomSalt(7);

        // Create a TripleDESCryptoServiceProvider object.
        TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();

        try
        {
            Console.WriteLine("Creating a key with PasswordDeriveBytes...");

            // Create a PasswordDeriveBytes object and then create
            // a TripleDES key from the password and salt.
            PasswordDeriveBytes pdb = new PasswordDeriveBytes(pwd, salt);


            // Create the key and set it to the Key property
            // of the TripleDESCryptoServiceProvider object.
            // This example uses the SHA1 algorithm.
            // Due to collision problems with SHA1, Microsoft recommends SHA256 or better.
            tdes.Key = pdb.CryptDeriveKey("TripleDES", "SHA1", 192, tdes.IV);


            Console.WriteLine("Operation complete.");
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }
        finally
        {
            // Clear the buffers
            ClearBytes(pwd);
            ClearBytes(salt);

            // Clear the key.
            tdes.Clear();
        }

        Console.ReadLine();
    }

    //////////////////////////////////////////////////////////
    // Helper methods:
    // CreateRandomSalt: Generates a random salt value of the
    //                   specified length.
    //
    // ClearBytes: Clear the bytes in a buffer so they can't
    //             later be read from memory.
    //////////////////////////////////////////////////////////

    public static byte[] CreateRandomSalt(int length)
    {
        // Create a buffer
        byte[] randBytes;

        if (length >= 1)
        {
            randBytes = new byte[length];
        }
        else
        {
            randBytes = new byte[1];
        }

        using (RandomNumberGenerator rng = RandomNumberGenerator.Create())
        {
            // Fill the buffer with random bytes.
            rng.GetBytes(randBytes);
        }

        // return the bytes.
        return randBytes;
    }

    public static void ClearBytes(byte[] buffer)
    {
        // Check arguments.
        if (buffer == null)
        {
            throw new ArgumentException("buffer");
        }

        // Set each byte in the buffer to 0.
        for (int x = 0; x < buffer.Length; x++)
        {
            buffer[x] = 0;
        }
    }
}

Imports System.Security.Cryptography
Imports System.Text



Module PasswordDerivedBytesExample


    Sub Main(ByVal args() As String)

        ' Get a password from the user.
        Console.WriteLine("Enter a password to produce a key:")

        Dim pwd As Byte() = Encoding.Unicode.GetBytes(Console.ReadLine())

        Dim salt As Byte() = CreateRandomSalt(7)

        ' Create a TripleDESCryptoServiceProvider object.
        Dim tdes As New TripleDESCryptoServiceProvider()

        Try
            Console.WriteLine("Creating a key with PasswordDeriveBytes...")

            ' Create a PasswordDeriveBytes object and then create 
            ' a TripleDES key from the password and salt.
            Dim pdb As New PasswordDeriveBytes(pwd, salt)


            ' Create the key and set it to the Key property
            ' of the TripleDESCryptoServiceProvider object.
            ' This example uses the SHA1 algorithm.
            ' Due to collision problems with SHA1, Microsoft recommends SHA256 or better.
            tdes.Key = pdb.CryptDeriveKey("TripleDES", "SHA1", 192, tdes.IV)


            Console.WriteLine("Operation complete.")
        Catch e As Exception
            Console.WriteLine(e.Message)
        Finally
            ' Clear the buffers
            ClearBytes(pwd)
            ClearBytes(salt)

            ' Clear the key.
            tdes.Clear()
        End Try

        Console.ReadLine()

    End Sub


    '********************************************************
    '* Helper methods:
    '* createRandomSalt: Generates a random salt value of the 
    '*                   specified length.  
    '*
    '* clearBytes: Clear the bytes in a buffer so they can't 
    '*             later be read from memory.
    '********************************************************
    Function CreateRandomSalt(ByVal length As Integer) As Byte()
        ' Create a buffer
        Dim randBytes() As Byte

        If length >= 1 Then
            randBytes = New Byte(length) {}
        Else
            randBytes = New Byte(0) {}
        End If

        ' Create a new RandomNumberGenerator.
        Using rand As RandomNumberGenerator = RandomNumberGenerator.Create()
            ' Fill the buffer with random bytes.
            rand.GetBytes(randBytes)
        End Using

        ' return the bytes.
        Return randBytes

    End Function


    Sub ClearBytes(ByVal buffer() As Byte)
        ' Check arguments.
        If buffer Is Nothing Then
            Throw New ArgumentException("buffer")
        End If

        ' Set each byte in the buffer to 0.
        Dim x As Integer
        For x = 0 To buffer.Length - 1
            buffer(x) = 0
        Next x

    End Sub
End Module

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) l, a hex editor, or by simply opening up the assembly in a text editor such as Notepad.exe.

See also

• Cryptographic Services

PasswordDeriveBytes(String, Byte[], CspParameters)

Source:

PasswordDeriveBytes.cs

Initializes a new instance of the PasswordDeriveBytes class with the password, key salt, and cryptographic service provider (CSP) parameters to use to derive the key.

public:
 PasswordDeriveBytes(System::String ^ strPassword, cli::array <System::Byte> ^ rgbSalt, System::Security::Cryptography::CspParameters ^ cspParams);

public PasswordDeriveBytes (string strPassword, byte[]? rgbSalt, System.Security.Cryptography.CspParameters? cspParams);

new System.Security.Cryptography.PasswordDeriveBytes : string * byte[] * System.Security.Cryptography.CspParameters -> System.Security.Cryptography.PasswordDeriveBytes

Public Sub New (strPassword As String, rgbSalt As Byte(), cspParams As CspParameters)

Parameters

strPassword

String

The password for which to derive the key.

rgbSalt

Byte[]

The key salt to use to derive the key.

cspParams

CspParameters

The CSP parameters for the operation.

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) tool, a hex editor, or by simply opening up the assembly in a text editor like notepad.exe.

See also

• Cryptographic Services

PasswordDeriveBytes(Byte[], Byte[], String, Int32)

Source:

PasswordDeriveBytes.cs

Initializes a new instance of the PasswordDeriveBytes class specifying the password, key salt, hash name, and iterations to use to derive the key.

public:
 PasswordDeriveBytes(cli::array <System::Byte> ^ password, cli::array <System::Byte> ^ salt, System::String ^ hashName, int iterations);

public PasswordDeriveBytes (byte[] password, byte[]? salt, string hashName, int iterations);

new System.Security.Cryptography.PasswordDeriveBytes : byte[] * byte[] * string * int -> System.Security.Cryptography.PasswordDeriveBytes

Public Sub New (password As Byte(), salt As Byte(), hashName As String, iterations As Integer)

Parameters

password

Byte[]

The password to derive the key for.

salt

Byte[]

The key salt to use to derive the key.

hashName

String

The hash algorithm to use to derive the key.

iterations

Int32

The iteration count to use to derive the key.

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 up the assembly in a text editor such as Notepad.exe.

For a list of hash algorithm names, see the CryptoConfig class.

See also

• CryptoConfig
• Cryptographic Services

PasswordDeriveBytes(String, Byte[], String, Int32)

Source:

PasswordDeriveBytes.cs

Initializes a new instance of the PasswordDeriveBytes class with the password, key salt, hash name, and number of iterations to use to derive the key.

public:
 PasswordDeriveBytes(System::String ^ strPassword, cli::array <System::Byte> ^ rgbSalt, System::String ^ strHashName, int iterations);

public PasswordDeriveBytes (string strPassword, byte[]? rgbSalt, string strHashName, int iterations);

new System.Security.Cryptography.PasswordDeriveBytes : string * byte[] * string * int -> System.Security.Cryptography.PasswordDeriveBytes

Public Sub New (strPassword As String, rgbSalt As Byte(), strHashName As String, iterations As Integer)

Parameters

strPassword

String

The password for which to derive the key.

rgbSalt

Byte[]

The key salt to use to derive the key.

strHashName

String

The name of the hash algorithm for the operation.

iterations

Int32

The number of iterations for the operation.

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) tool, a hex editor, or by simply opening up the assembly in a text editor like notepad.exe.

For a list of hash algorithm names, see the CryptoConfig class.

See also

• CryptoConfig
• Cryptographic Services

PasswordDeriveBytes(Byte[], Byte[], String, Int32, CspParameters)

Source:

PasswordDeriveBytes.cs

Initializes a new instance of the PasswordDeriveBytes class specifying the password, key salt, hash name, iterations, and cryptographic service provider (CSP) to use to derive the key.

public:
 PasswordDeriveBytes(cli::array <System::Byte> ^ password, cli::array <System::Byte> ^ salt, System::String ^ hashName, int iterations, System::Security::Cryptography::CspParameters ^ cspParams);

public PasswordDeriveBytes (byte[] password, byte[]? salt, string hashName, int iterations, System.Security.Cryptography.CspParameters? cspParams);

new System.Security.Cryptography.PasswordDeriveBytes : byte[] * byte[] * string * int * System.Security.Cryptography.CspParameters -> System.Security.Cryptography.PasswordDeriveBytes

Public Sub New (password As Byte(), salt As Byte(), hashName As String, iterations As Integer, cspParams As CspParameters)

Parameters

password

Byte[]

The password to derive the key for.

salt

Byte[]

The key salt to use to derive the key.

hashName

String

The hash algorithm to use to derive the key.

iterations

Int32

The iteration count to use to derive the key.

cspParams

CspParameters

The cryptographic service provider (CSP) parameters for the operation.

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 up the assembly in a text editor such as Notepad.exe.

For a list of hash algorithm names, see the CryptoConfig class.

See also

• CryptoConfig
• Cryptographic Services

PasswordDeriveBytes(String, Byte[], String, Int32, CspParameters)

Source:

PasswordDeriveBytes.cs

Initializes a new instance of the PasswordDeriveBytes class with the password, key salt, hash name, number of iterations, and cryptographic service provider (CSP) parameters to use to derive the key.

public:
 PasswordDeriveBytes(System::String ^ strPassword, cli::array <System::Byte> ^ rgbSalt, System::String ^ strHashName, int iterations, System::Security::Cryptography::CspParameters ^ cspParams);

public PasswordDeriveBytes (string strPassword, byte[]? rgbSalt, string strHashName, int iterations, System.Security.Cryptography.CspParameters? cspParams);

new System.Security.Cryptography.PasswordDeriveBytes : string * byte[] * string * int * System.Security.Cryptography.CspParameters -> System.Security.Cryptography.PasswordDeriveBytes

Public Sub New (strPassword As String, rgbSalt As Byte(), strHashName As String, iterations As Integer, cspParams As CspParameters)

Parameters

strPassword

String

The password for which to derive the key.

rgbSalt

Byte[]

The key salt to use to derive the key.

strHashName

String

The name of the hash algorithm for the operation.

iterations

Int32

The number of iterations for the operation.

cspParams

CspParameters

The CSP parameters for the operation.

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) tool, a hex editor, or by simply opening up the assembly in a text editor like notepad.exe.

For a list of hash algorithm names, see the CryptoConfig class.

See also

• CryptoConfig
• Cryptographic Services