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warn when invalid character is detected in QByteArray::fromHex()

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Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
This commit is contained in:
Ivailo Monev 2021-11-22 16:43:38 +02:00
parent 3998302179
commit 2fcfd9dff3
1 changed files with 22 additions and 14 deletions
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36
src/core/tools/qbytearray.cpp
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@ -3712,7 +3712,7 @@ QByteArray QByteArray::fromBase64(const QByteArray &base64)
}
/*!
Returns a decoded copy of the hex encoded array \a hexEncoded. Input is not checked
Returns a decoded copy of the hex encoded array \a hexEncoded. Input is checked
for validity; invalid characters in the input are skipped, enabling the
decoding process to continue with subsequent characters.
@ -3725,31 +3725,39 @@ QByteArray QByteArray::fromBase64(const QByteArray &base64)
QByteArray QByteArray::fromHex(const QByteArray &hexEncoded)
{
QByteArray res((hexEncoded.size() + 1)/ 2, Qt::Uninitialized);
uchar *result = (uchar *)res.d->data + res.size();
char *result = res.d->data + res.size();
bool odd_digit = true;
int invalidcount = 0;
bool oddhex = true;
for (int i = hexEncoded.size() - 1; i >= 0; --i) {
int ch = hexEncoded.at(i);
int tmp;
if (ch >= '0' && ch <= '9')
tmp = ch - '0';
else if (ch >= 'a' && ch <= 'f')
tmp = ch - 'a' + 10;
else if (ch >= 'A' && ch <= 'F')
if (ch >= '0' && ch <= '9') {
tmp = (ch - '0');
} else if (ch >= 'a' && ch <= 'f') {
tmp = (ch - 'a' + 10);
} else if (ch >= 'A' && ch <= 'F') {
tmp = ch - 'A' + 10;
else
} else {
invalidcount++;
continue;
if (odd_digit) {
}
if (oddhex) {
--result;
*result = tmp;
odd_digit = false;
oddhex = false;
} else {
*result |= tmp << 4;
odd_digit = true;
*result |= (tmp << 4);
oddhex = true;
}
}
res.remove(0, result - (const uchar *)res.constData());
if (Q_UNLIKELY(invalidcount > 0)) {
qWarning("QByteArray::fromHex: Invalid character in hex");
res.remove(0, invalidcount);
}
return res;
}