void ClearLoginTokenState ()
{
literalState = ImapLiteralState.None;
qstringState = ImapQStringState.None;
tokenType = ImapLoginTokenType.None;
literalOctets = 0;
literalSeen = 0;
}
bool SkipLiteralToken (List<AuthenticationSecret> secrets, byte[] buffer, ref int index, int endIndex, byte sentinel)
{
if (literalState == ImapLiteralState.Octets) {
while (index < endIndex && buffer[index] != (byte) '+' && buffer[index] != (byte) '}') {
int digit = buffer[index] - (byte) '0';
literalOctets = literalOctets * 10 + digit;
index++;
}
if (index < endIndex) {
if (buffer[index] == (byte) '+') {
literalState = ImapLiteralState.Plus;
textIndex = 0;
} else {
literalState = ImapLiteralState.CloseBrace;
textIndex = 1;
}
index++;
}
if (index >= endIndex)
return false;
}
if (literalState < ImapLiteralState.Literal) {
if (SkipText ("}\r\n", buffer, ref index, endIndex))
literalState = ImapLiteralState.Literal;
}
if (index >= endIndex || commandState == ImapAuthCommandState.Error)
return false;
if (literalState == ImapLiteralState.Literal) {
int skip = Math.Min (literalOctets - literalSeen, endIndex - index);
secrets.Add (new AuthenticationSecret (index, skip));
literalSeen += skip;
index += skip;
if (literalSeen == literalOctets)
literalState = ImapLiteralState.Complete;
}
if (literalState == ImapLiteralState.Complete && index < endIndex && buffer[index] == sentinel) {
index++;
return true;
}
return false;
}
bool SkipLoginToken (List<AuthenticationSecret> secrets, byte[] buffer, ref int index, int endIndex, byte sentinel)
{
int startIndex;
if (tokenType == ImapLoginTokenType.None) {
switch ((char) buffer[index]) {
case '{':
literalState = ImapLiteralState.Octets;
tokenType = ImapLoginTokenType.Literal;
index++;
break;
case '"':
tokenType = ImapLoginTokenType.QString;
index++;
break;
default:
tokenType = ImapLoginTokenType.Atom;
break;
}
}
switch (tokenType) {
case ImapLoginTokenType.Literal:
return SkipLiteralToken (secrets, buffer, ref index, endIndex, sentinel);
case ImapLoginTokenType.QString:
if (qstringState != ImapQStringState.Complete) {
startIndex = index;
while (index < endIndex) {
if (qstringState == ImapQStringState.Escaped) {
qstringState = ImapQStringState.None;
} else if (buffer[index] == (byte) '\\') {
qstringState = ImapQStringState.Escaped;
} else if (buffer[index] == (byte) '"') {
qstringState = ImapQStringState.EndQuote;
break;
}
index++;
}
if (index > startIndex)
secrets.Add (new AuthenticationSecret (startIndex, index - startIndex));
if (qstringState == ImapQStringState.EndQuote) {
qstringState = ImapQStringState.Complete;
index++;
}
}
if (index >= endIndex)
return false;
if (buffer[index] != sentinel) {
commandState = ImapAuthCommandState.Error;
return false;
}
index++;
return true;
default:
startIndex = index;
while (index < endIndex && buffer[index] != sentinel)
index++;
if (index > startIndex)
secrets.Add (new AuthenticationSecret (startIndex, index - startIndex));
if (index >= endIndex)
return false;
index++;
return true;
}
}