GODRIVER-1923 Error if BSON cstrings contain null bytes #622
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Co-authored-by: Divjot Arora <divjot.arora@10gen.com>
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…mongodb#684) Co-authored-by: Divjot Arora <divjot.arora@10gen.com>
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Per bsonspec.org, cstrings are only used for BSON key names and for the pattern/options fields in a BSON regex value so this PR applies validation to those types. This validation does not apply to regular BSON strings, which can have null bytes because they're prefixed with a 4-byte length. It also does not apply to extended JSON because the JSON specification allows null bytes and other unicode code points as long as they are properly escaped (e.g. in JSON, this would look like
{"foo\u0000": "bar"}.