在django中安全地存储加密凭证。

I'm working on a python/django app which, among other things, syncs data to a variety of other services, including samba shares, ssh(scp) servers, Google apps, and others. As such, it needs to store the credentials to access these services. Storing them as unencrypted fields would be, I presume, a Bad Idea, as an SQL injection attack could retrieve the credentials. So I would need to encrypt the creds before storage - are there any reliable libraries to achieve this?I'm working on a python/django app which, among