PasswordDeriveBytes Class

 
System_CAPS_noteNote

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obsoleteCodeEntityT:System.Security.Cryptography.Rfc2898DeriveBytes

Derives a key from a password using an extension of the PBKDF1 algorithm.

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

System.Object
  System.Security.Cryptography.DeriveBytes
    System.Security.Cryptography.PasswordDeriveBytes

[<ComVisibleAttribute(true)>]
type PasswordDeriveBytes = 
    class
        inherit DeriveBytes
    end

NameDescription
System_CAPS_pubmethodPasswordDeriveBytes(Byte[], Byte[])

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

System_CAPS_pubmethodPasswordDeriveBytes(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.

System_CAPS_pubmethodPasswordDeriveBytes(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.

System_CAPS_pubmethodPasswordDeriveBytes(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.

System_CAPS_pubmethodPasswordDeriveBytes(String, Byte[])

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

System_CAPS_pubmethodPasswordDeriveBytes(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.

System_CAPS_pubmethodPasswordDeriveBytes(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.

System_CAPS_pubmethodPasswordDeriveBytes(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.

NameDescription
System_CAPS_pubpropertyHashName

Gets or sets the name of the hash algorithm for the operation.

System_CAPS_pubpropertyIterationCount

Gets or sets the number of iterations for the operation.

System_CAPS_pubpropertySalt

Gets or sets the key salt value for the operation.

NameDescription
System_CAPS_pubmethodCryptDeriveKey(String, String, Int32, Byte[])

Derives a cryptographic key from the PasswordDeriveBytes object.

System_CAPS_pubmethodDispose()

When overridden in a derived class, releases all resources used by the current instance of the DeriveBytes class.(Inherited from DeriveBytes.)

System_CAPS_protmethodDispose(Boolean)

Releases the unmanaged resources used by the PasswordDeriveBytes class and optionally releases the managed resources.(Overrides DeriveBytes.Dispose(Boolean).)

System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGetBytes(Int32)

Obsolete. Returns pseudo-random key bytes.(Overrides DeriveBytes.GetBytes(Int32).)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethodReset()

Resets the state of the operation.(Overrides DeriveBytes.Reset().)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

This class uses an extension of the PBKDF1 algorithm defined in the PKCS#5 v2.0 standard to derive bytes suitable for use as key material from a password. The standard is documented in IETF RRC 2898.

System_CAPS_security Security Note

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.

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

No code example is currently available or this language may not be supported.

.NET Framework
Available since 1.1

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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