Class MessageIntegrityAttribute

The MESSAGE-INTEGRITY attribute contains an HMAC-SHA1 [RFC2104] of the STUN message. The MESSAGE-INTEGRITY attribute can be present in any STUN message type. Since it uses the SHA1 hash, the HMAC will be 20 bytes. The text used as input to HMAC is the STUN message, including the header, up to and including the attribute preceding the MESSAGE-INTEGRITY attribute. With the exception of the FINGERPRINT attribute, which appears after MESSAGE-INTEGRITY, agents MUST ignore all other attributes that follow MESSAGE-INTEGRITY.

Inheritance
System.Object
Attribute
MessageIntegrityAttribute
Inherited Members
Namespace: FM.LiveSwitch.Stun
Assembly: FM.LiveSwitch.dll
Syntax
public class MessageIntegrityAttribute : Attribute

Constructors

MessageIntegrityAttribute(Byte[])

Initializes a new instance of the MessageIntegrityAttribute class.

Declaration
public MessageIntegrityAttribute(byte[] keyBuffer)
Parameters
Type Name Description
System.Byte[] keyBuffer

The key as a buffer.

Properties

MessageBuffer

Gets or sets the message buffer.

Declaration
public DataBuffer MessageBuffer { get; set; }
Property Value
Type Description
DataBuffer

TypeValue

Gets the type value.

Declaration
public override int TypeValue { get; }
Property Value
Type Description
System.Int32
Overrides

Methods

GetValueLength()

Gets the length of the attribute value.

Declaration
protected override int GetValueLength()
Returns
Type Description
System.Int32
Overrides

IsValid(Byte[])

After creating a message-integrity attribute using the byte array representation, this method determines whether the supplied key is valid.

Declaration
public bool IsValid(byte[] keyBuffer)
Parameters
Type Name Description
System.Byte[] keyBuffer

The key as a buffer.
Returns
Type Description
System.Boolean

true if the key is valid; otherwise, false.

ReadValueFrom(DataBuffer, Int32, Int32, DataBuffer)

Initializes a new instance of the MessageIntegrityAttribute class.

Declaration
public static MessageIntegrityAttribute ReadValueFrom(DataBuffer buffer, int offset, int length, DataBuffer messageBuffer)
Parameters
Type Name Description
DataBuffer buffer

The buffer.
System.Int32 offset

The offset.
System.Int32 length

The length.
DataBuffer messageBuffer

The message buffer thus far.
Returns
Type Description
MessageIntegrityAttribute

ToString()

Returns a string that represents this instance.

Declaration
public override string ToString()
Returns
Type Description
System.String

A string that represents this instance.

WriteValueTo(DataBuffer, Int32)

Writes the attribute value to a data buffer.

Declaration
protected override void WriteValueTo(DataBuffer buffer, int offset)
Parameters
Type Name Description
DataBuffer buffer

The buffer.
System.Int32 offset

The offset.
Overrides