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Fix possible UB #150

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Fix possible UB #150

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8 changes: 0 additions & 8 deletions lib/libpcsc-cpp/include/pcsc-cpp/comp_winscard.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -32,11 +32,7 @@
#undef IGNORE
#endif

#ifdef __APPLE__
#pragma pack(1)
#else
#pragma pack(push, 1)
#endif

#ifndef SCARD_CTL_CODE
#define SCARD_CTL_CODE(code) (0x42000000 + (code))
Expand Down Expand Up @@ -148,8 +144,4 @@ struct PIN_VERIFY_STRUCTURE
uint32_t ulDataLength; // length of Data to be sent to the ICC
};

#ifdef __APPLE__
#pragma pack()
#else
#pragma pack(pop)
#endif
8 changes: 4 additions & 4 deletions lib/libpcsc-cpp/src/SmartCard.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -148,8 +148,9 @@ class CardImpl
{
uint8_t PINFrameOffset = 0;
uint8_t PINLengthOffset = 0;
byte_vector cmd(sizeof(PIN_VERIFY_STRUCTURE));
auto* data = (PIN_VERIFY_STRUCTURE*)cmd.data();
const byte_vector& d = commandApdu;
byte_vector cmd(sizeof(PIN_VERIFY_STRUCTURE) + d.size());
auto* data = new (cmd.data()) PIN_VERIFY_STRUCTURE {};
data->bTimerOut = PIN_PAD_PIN_ENTRY_TIMEOUT;
data->bTimerOut2 = PIN_PAD_PIN_ENTRY_TIMEOUT;
data->bmFormatString =
Expand All @@ -161,9 +162,8 @@ class CardImpl
data->bNumberMessage = CCIDDefaultInvitationMessage;
data->wLangId = lang;
data->bMsgIndex = NoInvitationMessage;
const byte_vector& d = commandApdu;
data->ulDataLength = uint32_t(d.size());
cmd.insert(cmd.cend(), d.cbegin(), d.cend());
std::copy(d.cbegin(), d.cend(), cmd.begin() + sizeof(PIN_VERIFY_STRUCTURE));

auto ioctl = feature(FEATURE_VERIFY_PIN_START);
if (feature(FEATURE_VERIFY_PIN_START) == features.cend())
Expand Down
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