szaszm commented on a change in pull request #848:
URL: https://github.com/apache/nifi-minifi-cpp/pull/848#discussion_r465624329
##
File path: libminifi/src/sitetosite/SiteToSiteClient.cpp
##
@@ -499,8 +499,9 @@ int16_t SiteToSiteClient::send(std::string transactionID,
DataPacket *packet, co
return -1;
}
-ret = transaction->getStream().writeData(reinterpret_cast(const_cast(packet->payload_.c_str())), len);
-if (ret != (int64_t)len) {
+ret = transaction->getStream().writeData(reinterpret_cast(const_cast(packet->payload_.c_str())),
+ gsl::narrow(len));
+if (ret != static_cast(len)) {
Review comment:
uint64_t to int64_t is a narrowing conversion
##
File path: extensions/http-curl/processors/InvokeHTTP.cpp
##
@@ -337,7 +337,7 @@ void InvokeHTTP::onTrigger(const
std::shared_ptr ,
const std::vector _body = client.getResponseBody();
const std::vector _headers = client.getHeaders();
-int64_t http_code = client.getResponseCode();
+int http_code = gsl::narrow(client.getResponseCode());
Review comment:
I would check the response code before assuming that it's valid. I'm not
sure whether curl validates the number before returning, but I wouldn't want a
malicious server or MITM to be able to crash (`std::terminate` on narrowing
failure) the minifi c++ agent.
##
File path: nanofi/src/core/cstream.c
##
@@ -153,9 +148,9 @@ int readUTFLen(uint32_t * utflen, cstream * stream) {
return ret;
}
-int readUTF(char * buf, uint64_t buflen, cstream * stream) {
+int readUTF(char * buf, uint32_t buflen, cstream * stream) {
Review comment:
Why uint32_t? Why not e.g. size_t or int?
##
File path: extensions/expression-language/Expression.cpp
##
@@ -194,9 +194,12 @@ Value expr_toLower(const std::vector ) {
Value expr_substring(const std::vector ) {
if (args.size() < 3) {
-return Value(args[0].asString().substr(args[1].asUnsignedLong()));
+size_t offset = gsl::narrow(args[1].asUnsignedLong());
+return Value(args[0].asString().substr(offset));
} else {
-return Value(args[0].asString().substr(args[1].asUnsignedLong(),
args[2].asUnsignedLong()));
+size_t offset = gsl::narrow(args[1].asUnsignedLong());
+size_t count = gsl::narrow(args[2].asUnsignedLong());
+return Value(args[0].asString().substr(offset, count));
Review comment:
:+1:
##
File path: libminifi/include/io/CRCStream.h
##
@@ -224,7 +222,7 @@ template
int CRCStream::readData(uint8_t *buf, int buflen) {
int ret = child_stream_->read(buf, buflen);
if (ret > 0) {
-crc_ = crc32(crc_, buf, ret);
+crc_ = crc32(gsl::narrow(crc_), buf, ret);
Review comment:
I suggest changing the type of `crc_` to `uint32_t` and `static_assert`
that `uLong` has the same width and signedness as `uint32_t`. This should make
`gsl::narrow` calls redundant.
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