# Change Log

## v0.14.0 (2022-06-13)
- Switch to Go module versioning conventions.

## v0.13 (2022-06-13)
- Reduce minimum Go version to 1.17.
- Update install instructions.

## v0.12 (2022-06-07)
- Retry failed log requests.  This should make certspotter resilient
  to rate limiting by logs.
- Add `-version` flag.
- Eliminate unnecessary dependency. certspotter now depends only on
  golang.org/x packages.
- Switch to Go modules.

## v0.11 (2021-08-17)
- Add support for contacting logs via HTTP proxies;
  just set the appropriate environment variable as documented at
  <https://golang.org/pkg/net/http/#ProxyFromEnvironment>.
- Work around RFC 6962 ambiguity related to consistency proofs
  for empty trees.

## v0.10 (2020-04-29)
- Improve speed by processing logs in parallel
- Add `-start_at_end` option to begin monitoring new logs at the end,
  which significantly speeds up Cert Spotter, at the cost of missing
  certificates that were added to a log before Cert Spotter starts
  monitoring it
- (Behavior change) Scan logs in their entirety the first time Cert
  Spotter is run, unless `-start_at_end` specified (behavior change)
- The log list is now retrieved from certspotter.org at startup instead
  of being embedded in the source. This will allow Cert Spotter to react
  more quickly to the frequent changes in logs.
- (Behavior change) the `-logs` option now expects a JSON file in the v2
  log list format. See <https://www.certificate-transparency.org/known-logs>
  and <https://www.gstatic.com/ct/log_list/v2/log_list_schema.json>.
- `-logs` now accepts an HTTPS URL in addition to a file path.
- (Behavior change) the `-underwater` option has been removed. If you want
  its behavior, specify `https://loglist.certspotter.org/underwater.json` to
  the `-logs` option.

## v0.9 (2018-04-19)
- Add Cloudflare Nimbus logs
- Remove Google Argon 2017 log
- Remove WoSign and StartCom logs due to disqualification by Chromium
  and extended downtime

## v0.8 (2017-12-08)
- Add Symantec Sirius log
- Add DigiCert 2 log

## v0.7 (2017-11-13)
- Add Google Argon logs
- Fix bug that caused crash on 32 bit architectures

## v0.6 (2017-10-19)
- Add Comodo Mammoth and Comodo Sabre logs
- Minor bug fixes and improvements

## v0.5 (2017-05-18)
- Remove PuChuangSiDa 1 log due to excessive downtime and presumptive
  disqualification from Chrome
- Add Venafi Gen2 log
- Improve monitoring robustness under certain pathological behavior
  by logs
- Minor documentation improvements

## v0.4 (2017-04-03)
- Add PuChuangSiDa 1 log
- Remove Venafi log due to fork and disqualification from Chrome

## v0.3 (2017-02-20)
- Revise `-all_time` flag (behavior change):
  - If `-all_time` is specified, scan the entirety of all logs, even
    existing logs
  - When a new log is added, scan it in its entirety even if `-all_time`
    is not specified
- Add new logs:
  - Google Icarus
  - Google Skydiver
  - StartCom
  - WoSign
- Overhaul log processing and auditing logic:
  - STHs are never deleted unless they can be verified
  - Multiple unverified STHs can be queued per log, laying groundwork
    for STH pollination support
  - New state directory layout; current state directories will be
    migrated, but migration will be removed in a future version
  - Persist condensed Merkle Tree state between runs, instead of
    reconstructing it from consistency proof every time
- Use a lock file to prevent multiple instances of Cert Spotter from
  running concurrently (which could clobber the state directory).
- Minor bug fixes and improvements

## v0.2 (2016-08-25)
- Suppress duplicate identifiers in output.
- Fix "EOF" error when running under Go 1.7.
- Fix bug where hook script could fail silently.
- Fix compilation under Go 1.5.

## v0.1 (2016-07-27)
- Initial release.