fix: Bearer regular expression matching in authenticate handler #614
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The implementation ( lib/handlers/authenticate-handler.ts#L145 ) of the pattern matching for the Bearer token matches only the string "Bearer" followed by one whitespace character followed by any number of non-whitespace characters. However, the loophole in the expression is that one can prefix the Authorization string with any string before the "Bearer" string and still get away with a successful match. This means that `fooBearer bar` or `foo Bearer bar` are valid headers according to the code. RFC 6750 | OAuth 2.0 Bearer Token Usage | Section 2.1 https://tools.ietf.org/html/rfc6750#section-2.1 specifies that the Authorization header start with the string "Bearer". This changeset modifies the code and the test case to make the above examples get thrown as `InvalidRequestError`s
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The implementation ( lib/handlers/authenticate-handler.ts#L145 )
of the pattern matching for the Bearer token matches only the string
"Bearer" followed by one whitespace character followed by any number of
non-whitespace characters. However, the loophole in the expression is
that one can prefix the Authorization string with any string before the
"Bearer" string and still get away with a successful match.
This means that
fooBearer barorfoo Bearer barare valid headersaccording to the code.
RFC 6750 | OAuth 2.0 Bearer Token Usage | Section 2.1
https://tools.ietf.org/html/rfc6750#section-2.1
specifies that the Authorization header start with the string "Bearer".
This changeset modifies the code and the test case to make the above
examples get thrown as
InvalidRequestErrors