Implement ct_objects_extractor for OpenSSL.

Implement ct_objects_extractor for OpenSSL.

With this, CTObjectsExtractorTest and MultiLogCTVerifierTest pass on OpenSSL
builds.

BUG=408687
Committed: https://crrev.com/8ea27e621946a33a7337ef84c2307c3dfa0eb4db
Cr-Commit-Position: refs/heads/master@{#293235}

[davidben, 2014-08-29 15:23:35]

davidben@chromium.org changed reviewers:
+ agl@chromium.org

[davidben, 2014-08-29 15:23:35]

Probably you're the best person to review this given all the CBS APIs in use.
ct_objects_extractor_nss.cc is the NSS version.

[davidben, 2014-09-02 15:58:18]

davidben@chromium.org changed reviewers:
+ eranm@chromium.org

[davidben, 2014-09-02 15:58:19]

+eranm as reviewer as well.

[Ryan Sleevi, 2014-09-03 00:42:20]

On 2014/09/02 15:58:19, David Benjamin wrote:
> +eranm as reviewer as well.

ping agl

[agl, 2014-09-03 20:04:18]

lgtm

https://codereview.chromium.org/519473002/diff/80001/net/cert/ct_objects_extr...
File net/cert/ct_objects_extractor_openssl.cc (right):

https://codereview.chromium.org/519473002/diff/80001/net/cert/ct_objects_extr...
net/cert/ct_objects_extractor_openssl.cc:147: if
(!StringEqualToCBS(cert_serial_number, &serial_number))
In some places we remove leading zeros from serial numbers but I've checked this
case and an exact match is correct.

[davidben, 2014-09-03 20:11:59]

The CQ bit was checked by davidben@chromium.org

[commit-bot: I haz the power, 2014-09-03 20:13:14]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/davidben@chromium.org/519473002/80001

[davidben, 2014-09-03 22:56:39]

The CQ bit was unchecked by davidben@chromium.org

[davidben, 2014-09-03 22:56:53]

The CQ bit was checked by davidben@chromium.org

[commit-bot: I haz the power, 2014-09-03 23:23:24]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/davidben@chromium.org/519473002/80001

[commit-bot: I haz the power, 2014-09-04 00:26:51]

Committed patchset #5 (id:80001) as 74af7a4f320c47c22944a2f50e1ae3b7c12a473c

[commit-bot: I haz the power, 2014-09-10 03:29:01]

Patchset 5 (id:??) landed as
https://crrev.com/8ea27e621946a33a7337ef84c2307c3dfa0eb4db
Cr-Commit-Position: refs/heads/master@{#293235}