QByteArray SshPacketParser::asString(const QByteArray &data, quint32 *offset)
{
const quint32 length = asUint32(data, offset);
if (size(data) < *offset + length)
throw SshPacketParseException();
const QByteArray &string = data.mid(*offset, length);
*offset += length;
return string;
}
Botan::BigInt SshPacketParser::asBigInt(const QByteArray &data, quint32 *offset)
{
const quint32 length = asUint32(data, offset);
if (length == 0)
return Botan::BigInt();
const Botan::byte *numberStart
= reinterpret_cast<const Botan::byte *>(data.constData() + *offset);
*offset += length;
return Botan::BigInt::decode(numberStart, length);
}
SshNameList SshPacketParser::asNameList(const QByteArray &data, quint32 *offset)
{
const quint32 length = asUint32(data, offset);
const int listEndPos = *offset + length;
if (data.size() < listEndPos)
throw SshPacketParseException();
SshNameList names(length + 4);
int nextNameOffset = *offset;
int nextCommaOffset = data.indexOf(',', nextNameOffset);
while (nextNameOffset > 0 && nextNameOffset < listEndPos) {
const int stringEndPos = nextCommaOffset == -1
|| nextCommaOffset > listEndPos ? listEndPos : nextCommaOffset;
names.names << QByteArray(data.constData() + nextNameOffset,
stringEndPos - nextNameOffset);
nextNameOffset = nextCommaOffset + 1;
nextCommaOffset = data.indexOf(',', nextNameOffset);
}
*offset += length;
return names;
}
quint32 SshPacketParser::asUint32(const QByteArray &data, quint32 *offset)
{
const quint32 v = asUint32(data, *offset);
*offset += 4;
return v;
}
Variant::operator uint32_t() const { return asUint32(); }
