mapleFU commented on code in PR #43222:
URL: https://github.com/apache/arrow/pull/43222#discussion_r1675034356
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cpp/src/parquet/metadata.cc:
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@@ -649,9 +649,12 @@ class FileMetaData::FileMetaDataImpl {
std::string key = file_decryptor_->GetFooterKey();
std::string aad = encryption::CreateFooterAad(file_decryptor_->file_aad());
- auto aes_encryptor = encryption::AesEncryptor::Make(
- file_decryptor_->algorithm(), static_cast<int>(key.size()), true,
- false /*write_length*/, nullptr);
+ auto aes_encryptor =
encryption::AesEncryptor::Make(file_decryptor_->algorithm(),
+
static_cast<int>(key.size()),
+ true, false
/*write_length*/);
+ if (ARROW_PREDICT_FALSE(aes_encryptor == nullptr)) {
+ throw ParquetException("Could not create AES encryptor for signature
verification");
Review Comment:
> Maybe it would be better to change Make to return
Result<std::unique_ptr<AesEncryptor>> to enforce checking for failure, or
possibly it makes sense to just change the _nossl versions of Make to throw an
exception rather than return null, as I can't see anywhere that handles a null
value already?
Currently I'm not familiar with encryption enough, so I just put the
checking here🤔
> AesDecryptor::Make also seems to have the same problem.
Yeah I'll update it here
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