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This bug is created as a clone of upstream ticket:
https://fedorahosted.org/freeipa/ticket/5333

If a negative offset between the device and the server is detected during otptoken-sync, it will underflow, and set a large positive value as offset instead.

{{{

-------------------
1 OTP token matched
-------------------
  dn:
ipatokenuniqueid=1e7a8029-8872-46f5-8254-9d03a62d2417,cn=otp,dc=ipa,dc=test
  Unique ID: 1e7a8029-8872-46f5-8254-9d03a62d2417
  Type: TOTP
  Owner: test
  Key: eu/S8oUunB188tRc5HE8CkxMmyI=
  Algorithm: sha1
  Digits: 6
  Clock offset: 4294963816
  Clock interval: 30
  ipatokentotpwatermark: 48117551
  objectclass: top, ipatokentotp, ipatoken
}}}

Fixed upstream
master:
https://fedorahosted.org/freeipa/changeset/d3cca6db57fb26aea1d45bc522336dddc6256825
ipa-4-2:
https://fedorahosted.org/freeipa/changeset/3c52f62e6c4e07b107780d95a6a4ff79d89c75b9

This is probably a duplicate of:
https://bugzilla.redhat.com/show_bug.cgi?id=1217009

Hashes in the previous comment are not correct, following ones are.

master:
https://fedorahosted.org/freeipa/changeset/9e3eeadeb3120f3577e00ab9cb410eccf8d71de0
ipa-4-2:
https://fedorahosted.org/freeipa/changeset/7db0a8e8512733ff91462b9b3b20c21ad6ec4212

This is indeed a duplicate of bug 1217009.

*** This bug has been marked as a duplicate of bug 1217009 ***