is available on github. To download, simply type:
git clone https://github.com/eriktews/certificate-transparency-tools.git
cd certificate-transparency-tools
mkdir out
python download_all_certs.py https://ct1.digicert-ct.com/log out/digicert-
find out/ -name "digicert*precert*" | xargs -n 8000 python get_precert_cn.py | sort -u > all-digicert-pre-certificate-names-sorted.txt
The result should be a sorted list of all hostnames (including with wildcards) digicert every issued a certificate for.
Future work
So far, no special verification of the data supplied by the digicert server is done. Feel free to submit patches on github to improve this code. Also feel free to play with the data and spot any hostnames in the result that looks suspicious to you.