protected static void AuthCRAMMD5(SmtpServerSession context, SmtpClientInputLine input)
{
try
{
const string AuthCRAMMD5Key = "AuthCRAMMD5Key";
context._CurrentHandlers = _AuthCRAMMD5Handlers;
if (input.Command.ToUpper() == "AUTH")
{
context.ClearIdentity();
context.Items[AuthCRAMMD5Key] = Guid.NewGuid().ToByteArray().ToBase64();
context.WriteLine(334, context.Items[AuthCRAMMD5Key] as string);
}
else
{
var pair = input.RawInput.Base64ToBytes().ToString(Encoding.UTF8).Split(' ');
context._User.Name = pair.First();
var credential = context.Server
.Credentials
.FirstOrDefault(c => c.UserName == context._User.Name);
if (credential == null)
{
FailAuthentication(context);
return;
}
var hmacmd5str = new HMACMD5(credential.Password.GetBytes())
.ComputeHash(context.Items[AuthCRAMMD5Key].ToString().Base64ToBytes())
.ToHexString();
context.Items.Remove(AuthCRAMMD5Key);
if (hmacmd5str != pair.Last())
{
FailAuthentication(context);
}
else
{
Authentication(context);
}
}
}
catch (FormatException)
{
context._CurrentHandlers = _InitialHandlers;
UnknownCommand(context, input);
}
}
protected static void AuthPlain(SmtpServerSession context, SmtpClientInputLine input)
{
try
{
context._CurrentHandlers = _AuthPlainHandlers;
if (input.Command.ToUpper() == "AUTH")
{
context.ClearIdentity();
var user = input.Params.Skip(1).FirstOrDefault() ?? "";
if (user.IsNullOrEmpty())
{
context.WriteLine(334, "Username:"******"Password:"******"Password:".GetBytes().ToBase64());
}
else
{
var password = input.RawInput.Base64ToBytes().ToString(Encoding.UTF8);
var found = context.Server.Credentials.Any(c => c.UserName == context.User.Name && c.Password == password);
if (found == false)
{
FailAuthentication(context);
}
else
{
Authentication(context);
}
}
}
catch (FormatException)
{
context._CurrentHandlers = _InitialHandlers;
UnknownCommand(context, input);
}
}
protected static void FailAuthentication(SmtpServerSession context)
{
context.ClearIdentity();
context._CurrentHandlers = _InitialHandlers;
context.WriteLine(535, " Error: authentication failed");
}
protected static void AuthPlain(SmtpServerSession context, SmtpClientInputLine input)
{
try
{
context._CurrentHandlers = _AuthPlainHandlers;
if (input.Command.ToUpper() == "AUTH")
{
context.ClearIdentity();
var user = input.Params.Skip(1).FirstOrDefault() ?? "";
if (user.IsNullOrEmpty())
{
context.WriteLine(334, "Username:"******"Password:"******"Password:".GetBytes().ToBase64());
}
else
{
var password = input.RawInput.Base64ToBytes().ToString(Encoding.UTF8);
var found = context.Server.Credentials.Any(c => c.UserName == context.User.Name && c.Password == password);
if (found == false)
{
FailAuthentication(context);
}
else
{
Authentication(context);
}
}
}
catch (FormatException)
{
context._CurrentHandlers = _InitialHandlers;
UnknownCommand(context, input);
}
}
protected static void AuthCRAMMD5(SmtpServerSession context, SmtpClientInputLine input)
{
try
{
const string AuthCRAMMD5Key = "AuthCRAMMD5Key";
context._CurrentHandlers = _AuthCRAMMD5Handlers;
if (input.Command.ToUpper() == "AUTH")
{
context.ClearIdentity();
context.Items[AuthCRAMMD5Key] = Guid.NewGuid().ToByteArray().ToBase64();
context.WriteLine(334, context.Items[AuthCRAMMD5Key] as string);
}
else
{
var pair = input.RawInput.Base64ToBytes().ToString(Encoding.UTF8).Split(' ');
context._User.Name = pair.First();
var credential = context.Server
.Credentials
.FirstOrDefault(c => c.UserName == context._User.Name);
if (credential == null)
{
FailAuthentication(context);
return;
}
var hmacmd5str = new HMACMD5(credential.Password.GetBytes())
.ComputeHash(context.Items[AuthCRAMMD5Key].ToString().Base64ToBytes())
.ToHexString();
context.Items.Remove(AuthCRAMMD5Key);
if (hmacmd5str != pair.Last())
{
FailAuthentication(context);
}
else
{
Authentication(context);
}
}
}
catch (FormatException)
{
context._CurrentHandlers = _InitialHandlers;
UnknownCommand(context, input);
}
}
protected static void FailAuthentication(SmtpServerSession context)
{
context.ClearIdentity();
context._CurrentHandlers = _InitialHandlers;
context.WriteLine(535, " Error: authentication failed");
}
