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crl_set: Support big endian

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klzgrad 2019-11-30 22:19:02 +08:00
parent 7c605f71f9
commit 07da15711f
1 changed files with 6 additions and 14 deletions
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20
src/net/cert/crl_set.cc
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@ -46,8 +46,8 @@ base::DictionaryValue* ReadHeader(base::StringPiece* data) {
uint16_t header_len;
if (data->size() < sizeof(header_len))
return nullptr;
// Assumes little-endian.
memcpy(&header_len, data->data(), sizeof(header_len));
header_len = static_cast<uint8_t>(data->data()[0]);
header_len |= static_cast<uint8_t>(data->data()[1]) << 8;
data->remove_prefix(sizeof(header_len));
if (data->size() < header_len)
@ -81,8 +81,10 @@ bool ReadCRL(base::StringPiece* data,
uint32_t num_serials;
if (data->size() < sizeof(num_serials))
return false;
// Assumes little endian.
memcpy(&num_serials, data->data(), sizeof(num_serials));
num_serials = static_cast<uint8_t>(data->data()[0]);
num_serials |= static_cast<uint8_t>(data->data()[1]) << 8;
num_serials |= static_cast<uint8_t>(data->data()[2]) << 16;
num_serials |= static_cast<uint8_t>(data->data()[3]) << 24;
data->remove_prefix(sizeof(num_serials));
if (num_serials > 32 * 1024 * 1024) // Sanity check.
@ -194,16 +196,6 @@ CRLSet::~CRLSet() = default;
// static
bool CRLSet::Parse(base::StringPiece data, scoped_refptr<CRLSet>* out_crl_set) {
TRACE_EVENT0(NetTracingCategory(), "CRLSet::Parse");
// Other parts of Chrome assume that we're little endian, so we don't lose
// anything by doing this.
#if defined(__BYTE_ORDER)
// Linux check
static_assert(__BYTE_ORDER == __LITTLE_ENDIAN, "assumes little endian");
#elif defined(__BIG_ENDIAN__)
// Mac check
#error assumes little endian
#endif
std::unique_ptr<base::DictionaryValue> header_dict(ReadHeader(&data));
if (!header_dict.get())
return false;