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using System;
using System.Collections.Generic;
using System.Text;
namespace LumiSoft.Net.SIP.Message
{
/// <summary>
/// Implements SIP "Authentication-Info" value. Defined in RFC 3261.
/// According RFC 3261 authentication info can contain Digest authentication info only.
/// </summary>
public class SIP_t_AuthenticationInfo : SIP_t_Value
{
private string m_NextNonce = null;
private string m_Qop = null;
private string m_ResponseAuth = null;
private string m_CNonce = null;
private int m_NonceCount = -1;
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="value">Authentication-Info valu value.</param>
public SIP_t_AuthenticationInfo(string value)
{
Parse(new StringReader(value));
}
#region method Parse
/// <summary>
/// Parses "Authentication-Info" from specified value.
/// </summary>
/// <param name="value">SIP "Authentication-Info" value.</param>
/// <exception cref="ArgumentNullException">Raised when <b>value</b> is null.</exception>
/// <exception cref="SIP_ParseException">Raised when invalid SIP message.</exception>
public void Parse(string value)
{
if(value == null){
throw new ArgumentNullException("value");
}
Parse(new StringReader(value));
}
/// <summary>
/// Parses "Authentication-Info" from specified reader.
/// </summary>
/// <param name="reader">Reader what contains Authentication-Info value.</param>
/// <exception cref="ArgumentNullException">Raised when <b>reader</b> is null.</exception>
/// <exception cref="SIP_ParseException">Raised when invalid SIP message.</exception>
public override void Parse(StringReader reader)
{
/*
Authentication-Info = "Authentication-Info" HCOLON ainfo *(COMMA ainfo)
ainfo = nextnonce / message-qop / response-auth / cnonce / nonce-count
nextnonce = "nextnonce" EQUAL nonce-value
response-auth = "rspauth" EQUAL response-digest
response-digest = LDQUOT *LHEX RDQUOT
nc-value = 8LHEX
*/
if(reader == null){
throw new ArgumentNullException("reader");
}
while(reader.Available > 0){
string word = reader.QuotedReadToDelimiter(',');
if(word != null && word.Length > 0){
string[] name_value = word.Split(new char[]{'='},2);
if(name_value[0].ToLower() == "nextnonce"){
this.NextNonce = name_value[1];
}
else if(name_value[0].ToLower() == "qop"){
this.Qop = name_value[1];
}
else if(name_value[0].ToLower() == "rspauth"){
this.ResponseAuth = name_value[1];
}
else if(name_value[0].ToLower() == "cnonce"){
this.CNonce = name_value[1];
}
else if(name_value[0].ToLower() == "nc"){
this.NonceCount = Convert.ToInt32(name_value[1]);
}
else{
throw new SIP_ParseException("Invalid Authentication-Info value !");
}
}
}
}
#endregion
#region method ToStringValue
/// <summary>
/// Converts SIP_t_AuthenticationInfo to valid Authentication-Info value.
/// </summary>
/// <returns></returns>
public override string ToStringValue()
{
/*
Authentication-Info = "Authentication-Info" HCOLON ainfo *(COMMA ainfo)
ainfo = nextnonce / message-qop / response-auth / cnonce / nonce-count
nextnonce = "nextnonce" EQUAL nonce-value
response-auth = "rspauth" EQUAL response-digest
response-digest = LDQUOT *LHEX RDQUOT
nc-value = 8LHEX
*/
StringBuilder retVal = new StringBuilder();
if(m_NextNonce != null){
retVal.Append("nextnonce=" + m_NextNonce);
}
if(m_Qop != null){
if(retVal.Length > 0){
retVal.Append(',');
}
retVal.Append("qop=" + m_Qop);
}
if(m_ResponseAuth != null){
if(retVal.Length > 0){
retVal.Append(',');
}
retVal.Append("rspauth=" + TextUtils.QuoteString(m_ResponseAuth));
}
if(m_CNonce != null){
if(retVal.Length > 0){
retVal.Append(',');
}
retVal.Append("cnonce=" + m_CNonce);
}
if(m_NonceCount != -1){
if(retVal.Length > 0){
retVal.Append(',');
}
retVal.Append("nc=" + m_NonceCount.ToString("X8"));
}
return retVal.ToString();
}
#endregion
#region Properties Implementation
/// <summary>
/// Gets or sets server next predicted nonce value. Value null means that value not specified.
/// </summary>
public string NextNonce
{
get{ return m_NextNonce; }
set{ m_NextNonce = value; }
}
/// <summary>
/// Gets or sets QOP value. Value null means that value not specified.
/// </summary>
public string Qop
{
get{ return m_Qop; }
set{ m_Qop = value; }
}
/// <summary>
/// Gets or sets rspauth value. Value null means that value not specified.
/// This can be only HEX value.
/// </summary>
public string ResponseAuth
{
get{ return m_ResponseAuth; }
set{
// TODO: Check that value is hex value
m_ResponseAuth = value;
}
}
/// <summary>
/// Gets or sets cnonce value. Value null means that value not specified.
/// </summary>
public string CNonce
{
get{ return m_CNonce; }
set{ m_CNonce = value; }
}
/// <summary>
/// Gets or sets nonce count. Value -1 means that value not specified.
/// </summary>
public int NonceCount
{
get{ return m_NonceCount; }
set{
if(value < 0){
m_NonceCount = -1;
}
else{
m_NonceCount = value;
}
}
}
#endregion
}
}
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