Google this week reversed an overhaul of one in all its security-related file codecs after the transition broke Android apps.

In November, 2021, Google introduced adjustments to the format of its Chrome Certificates Transparency log checklist file and, in August, 2022, notified builders whose apps is perhaps affected that it will cease publishing legacy log checklist information on October 17, 2022.

A certificate transparency log is an append-only public ledger of newly issued safety certificates trusted for issues like HTTPS encryption. The general purpose of that is to permit organizations and netizens to simply monitor and audit these newest certs, and spot and invalidate rogue or wrongly issued certificates that may very well be used to, as an illustration, impersonate companies and software program builders. Google vacuums up these logs from certificates authorities, and publishes this consolidated document because the Chrome Certificates Transparency log.

The web large had hoped to maneuver to model 3 of that log file format, and drop model 2, although that did not fairly go in keeping with plan.

“If there are any instruments or different dependencies nonetheless counting on these older variations, we encourage maintainers emigrate to the v3 checklist earlier than this date,” warned Devon O’Brien, Chrome safety engineer, in a Certificates Transparency dialogue group.

However not everybody acquired the memo. And when the deadline arrived on Wednesday, February 15, 2023, apps counting on the Chrome log and never anticipating the brand new format broke. Google, regardless of delaying the elimination of v2 format log checklist information, scrambled to undo the adjustments.


Google modified the schema of the CT Log Listing file it distributes, altering the set of keys and values within the JSON file. Apps anticipating v2 of this file thus wanted to be revised to deal with the version 3 knowledge format.

Google stopped publishing v1 in October after which the next month offered a transition plan by means of which v3 knowledge may very well be had from the v2 endpoint till February 15.

One rationale for this was a third-party library for Android and JVM (com.appmattus.certificatetransparency) that remained unprepared for the transition to the v3 schema.

“We now have been carefully monitoring the state of affairs within the third occasion library,” defined Google software program engineer Roger Ng in a post to the dialogue group.

The state of affairs with the library, maintained principally by a single UK-based developer, is that a pull request submitted again in September, 2022, emigrate the log file dependency from v2 to v3 was languishing unmerged – the repair was by no means utilized. These utilizing the library noticed the approaching deadline and urged that the change be accepted and merged into the codebase.

However to no avail. The library didn’t get mounted by February 15, which was when Google stopped offering v2 log checklist knowledge. And apps broke.

In a message titled, “URGENT: Manufacturing SDK with lengthy tail makes use of v2 API,” a developer recognized as Udi Ben Senior stated that his firm has an SDK – probably this one – that makes use of third-party libraries tied to model 2 of the log checklist file schema.

“Since we offer an SDK, there is a lengthy buyer tail for updating their functions with a brand new CT library, as soon as it’s launched,” he wrote. “This difficulty hit us without warning, I kindly request to resurrect V2 API for 90 extra days, that is extraordinarily pressing as we’ve hundreds of thousands of customers that at the moment can’t use our SDK.”

All our apps are out of enterprise and the influence of enterprise loss is huge for us

One other software program maker, Saumya Singh Rathore, co-founder of WinZO Video games – a big gaming firm in India – made a similar request as a result of “all our apps are out of enterprise and the influence of enterprise loss is huge for us.”

In a subsequent post, she attributed the issue to the appmattus certificates transparency library.

“The influence on our enterprise is big,” wrote Rathore. “We now have off-the-deck/playstore distribution by means of our web site We now have 100 million registered customers and this transition would require us to drift a brand new APK/ power replace. As you’d know there’s a vital funnel drop. Our app-only enterprise is down for the final 2 hours and we’re dropping vital site visitors each second.”

Core-JS chief complains open supply is damaged, nobody pays for it


Joel Oughton-Estruch, engineering supervisor for finance app maker TrueLayer, additionally despatched out a plea for a Google rollback: “We missed this announcement and this transformation has induced SSL failures throughout all our Android Apps on finish person gadgets.”

Confronted with these requests and others, Google’s certificates transparency group initiated a rollback. A brand new date for the elimination of CT log file checklist model 2 has not but been set.

In the meantime, one developer has voiced curiosity in forking the appmattus library.

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