[jira] [Created] (ARROW-16225) [c++][parquet] encryption code bug?

[zhengle (Jira)]

zhengle created ARROW-16225:
-------------------------------

             Summary: [c++][parquet] encryption code bug?
                 Key: ARROW-16225
                 URL: https://issues.apache.org/jira/browse/ARROW-16225
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
            Reporter: zhengle


File:  cpp\src\parquet\encryption\encryption.cc
Line:  393
```
...
encryption::RandBytes(aad_file_unique, sizeof(kAadFileUniqueLength));
...
```

`sizeof ` seems unnecessary here?



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