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author | Tor Arne Vestbø <tor.arne.vestbo@qt.io> | 2021-07-12 13:29:17 +0200 |
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committer | Tor Arne Vestbø <tor.arne.vestbo@qt.io> | 2021-07-13 00:59:49 +0200 |
commit | 3eac6079d9a02fbedd3740186eaaf21134dc45c2 (patch) | |
tree | 60158368eaa905b9a75ada853d3aedf68f1f102b /src | |
parent | c0b7d834b066d93bb3314f4bcaec0ab42a661055 (diff) |
macOS: Don't mangle QByteArray settings with @ prefix by decoding as UTF-8
QSettings encodes QVariants as @Type(data) strings. If that data contains
a null-byte, we write the string as UTF-8 encoded CFData. When reading it
back we look for a @ prefix, and then pass it as UTF-8 through stringToVariant.
The problem arises then the user writes raw QByteArrays with a @ prefix.
We can detect this situation by checking the result of stringToVariant,
and if it's just a simple conversion of the string into a QVariant, we
know that stringToVariant hit its fallback path due to not finding any
embedded variants.
If that's the case, we return the raw bytes as a QByteArray.
Pick-to: 6.2 6.1 5.15 5.12
Change-Id: I4ac5c35d0a6890ebea983b9aca0a3a36b0143de2
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src')
-rw-r--r-- | src/corelib/io/qsettings_mac.cpp | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/corelib/io/qsettings_mac.cpp b/src/corelib/io/qsettings_mac.cpp index 29ea995f2d..59f0015b63 100644 --- a/src/corelib/io/qsettings_mac.cpp +++ b/src/corelib/io/qsettings_mac.cpp @@ -247,7 +247,15 @@ static QVariant qtValue(CFPropertyListRef cfvalue) } const QString str = QString::fromUtf8(byteArray.constData(), byteArray.size()); - return QSettingsPrivate::stringToVariant(str); + QVariant variant = QSettingsPrivate::stringToVariant(str); + if (variant == QVariant(str)) { + // We did not find an encoded variant in the string, + // so return the raw byte array instead. + byteArray.detach(); + return byteArray; + } + + return variant; } else if (typeId == CFDictionaryGetTypeID()) { CFDictionaryRef cfdict = static_cast<CFDictionaryRef>(cfvalue); CFTypeID arrayTypeId = CFArrayGetTypeID(); |