Broken SSL verification Datastax

gistfile1.txt

root@precise64:/etc/apt/sources.list.d# curl -L https://debian.datastax.com/debian/repo_key | sudo apt-key add -
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0curl: (60) SSL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
More details here: http://curl.haxx.se/docs/sslcerts.html

curl performs SSL certificate verification by default, using a "bundle"
 of Certificate Authority (CA) public keys (CA certs). If the default
 bundle file isn't adequate, you can specify an alternate file
 using the --cacert option.
If this HTTPS server uses a certificate signed by a CA represented in
 the bundle, the certificate verification probably failed due to a
 problem with the certificate (it might be expired, or the name might
 not match the domain name in the URL).
If you'd like to turn off curl's verification of the certificate, use
 the -k (or --insecure) option.
gpg: no valid OpenPGP data found.

Taken from http://www.datastax.com/documentation/getting_started/doc/getting_started/gettingStartedDEB_DSE_t.html

Executed on a vanilla Vagrant box running Ubuntu Precise 64-bit.

Workaround: Use http instead of https.

Seem to validate fine in my Chrome browser. At least downloaded the file without complaining.