Support SSL (FTPS) via environment options

[kedarac]

Add a way to pass SSL key and certificate to enable Secure FTP (SFTP).

vsftpd supports the following via its conf file:

ssl_enable=YES
allow_anon_ssl=NO
force_local_data_ssl=YES
force_local_logins_ssl=YES
ssl_tlsv1=YES
ssl_sslv2=NO
ssl_sslv3=NO
require_ssl_reuse=NO
ssl_ciphers=HIGH
rsa_cert_file=/etc/vsftpd.pem
rsa_private_key_file=/etc/vsftpd.pem
pasv_max_port=65535
pasv_min_port=64000

[artjomsk]

pasv_max_port and pasv_min_port are not related to SSL and have been already supported by environment variables: PASV_MAX_PORT and PASV_MIN_PORT

[artjomsk]

SFTP is completely another story where vsftpd isn't needed at all, but support for FTPS (FTP + SSL) can be easily done. Watch my pull request - #42

[kedarac]

Thanks for the quick response on the issue.

pasv_max_port and pasv_min_port are not related to SSL

Yes, I understand these are already supported. I pasted 2 extra lines while referring from a blog post.

Regarding SFTP and FTPS, I was not clear that they both were different things. Now that I read about them, I am editing the issue title.

@fauria This issue can be closed once you accept the MR.

[lucaskuperman]

@fauria Any ETA for supporting SSL?

[fauria]

We need to be careful here to avoid breaking non-SSL deployments. I'll have a look at this ASAP, but can't guarantee an ETA at the time, unfortunately.

[markhobson]

It'd be great to get this FTPS support merged.

In the meantime, @artjomsk would you be able to rebase your fork so it includes the recent PASV_PROMISCUOUS support? I'm in the unfortunate position of needing both that and TLS, and I'd rather not create yet another fork! I've rebased locally and it's pretty straightforward. Thanks :)