Allow a leeway to be given for the iat claim verification - #747
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denis1011101 wants to merge 1 commit into
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Allow a leeway to be given for the iat claim verification#747denis1011101 wants to merge 1 commit into
denis1011101 wants to merge 1 commit into
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The iat claim is verified with an exact comparison against the local
clock, so a token is rejected whenever the clock of the issuer is even
marginally ahead of the clock of the verifier. There was no way to
tolerate that drift: the global leeway option does not apply to this
claim and iat_leeway was removed in 2.2.0.
Accept a leeway for the claim, defaulting to 0 so that the current
behaviour is unchanged, and keep the comparison exact:
JWT.decode(token, secret, true, verify_iat: { leeway: 30 })
JWT::Claims.verify_payload!(payload, iat: { leeway: 30 })
Refs jwt#353
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Adds an optional
leewayto theiatverification. Refs #353.Right now
iatis compared exactly against the local clock, so a token getsrejected as soon as the issuer's clock is slightly ahead of the verifier's.
There's no way to allow for that: the global
leewaydoesn't apply to thisclaim, and
iat_leewaywas dropped in 2.2.0.In #353 (comment) anakinj
suggested keeping the comparison exact and letting the caller say how much drift
is acceptable, so that's what this does:
It defaults to
0, so nothing changes for existing code. The value is read fromthe claim's own options, as in that comment, which keeps the old
iat_leewayname out of the API.
Refs rather than Closes, since the default behaviour stays as it was.
Checklist
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