Home » Adding a self-signed certificate to the “trusted list”

Adding a self-signed certificate to the “trusted list”

Solutons:


The simple answer to this is that pretty much each application will handle it differently.

Also OpenSSL and GNUTLS (the most widely used certificate processing libraries used to handle signed certificates) behave differently in their treatment of certs which also complicates the issue. Also operating systems utilize different mechanisms to utilize “root CA” used by most websites.

That aside, giving Debian as an example. Install the ca-certificates package:

apt-get install ca-certificates

You then copy the public half of your untrusted CA certificate (the one you use to sign your CSR) into the CA certificate directory (as root):

cp cacert.crt /usr/share/ca-certificates

NOTE: Certificate needs to have .crt extension for it to be picked up.

And get it to rebuild the directory with your certificate included, run as root:

dpkg-reconfigure ca-certificates

and select the ask option, scroll to your certificate, mark it for inclusion and select ok.

Most browsers use their own CA database, and so tools like certutil have to be used to modify their contents (on Debian that is provided by the libnss3-tools package). For example, with Chrome you run something along the lines of:

certutil -d sql:$HOME/.pki/nssdb -A -t "C,," -n "My Homemade CA" -i /path/to/CA/cert.file

Firefox will allow you to browse to the certificate on disk, recognize it a certificate file and then allow you to import it to Root CA list.

Most other commands such as curl take command line switches you can use to point at your CA,

 curl --cacert  /path/to/CA/cert.file https://...

or drop the SSL validation altogether

 curl --insecure https://...

The rest will need individual investigation if the ca-certificates like trick does not sort it for that particular application.

Non Interactive Approach

For use in a non-interactive context (e.g. a chef recipe) you can use the following sequence.

sudo cp my.crt /usr/local/share/ca-certificates/
sudo update-ca-certificates
  • Tested and works on debian 5/6 & Ubuntu 14.04.
  • For more information, see man update-ca-certificates

This method is preferred over @Drav’s method, since /usr/share/ is typically reserved for files added by the OS / apt-get.

On Fedora 23, add the .pem or .der file to /etc/pki/ca-trust/source/anchors/ and run sudo update-ca-trust extract.

See man update-ca-trust for details, e.g. whether to use /etc or /usr.

Related Solutions

Joining bash arguments into single string with spaces

[*] I believe that this does what you want. It will put all the arguments in one string, separated by spaces, with single quotes around all: str="'$*'" $* produces all the scripts arguments separated by the first character of $IFS which, by default, is a space....

AddTransient, AddScoped and AddSingleton Services Differences

TL;DR Transient objects are always different; a new instance is provided to every controller and every service. Scoped objects are the same within a request, but different across different requests. Singleton objects are the same for every object and every...

How to download package not install it with apt-get command?

Use --download-only: sudo apt-get install --download-only pppoe This will download pppoe and any dependencies you need, and place them in /var/cache/apt/archives. That way a subsequent apt-get install pppoe will be able to complete without any extra downloads....

What defines the maximum size for a command single argument?

Answers Definitely not a bug. The parameter which defines the maximum size for one argument is MAX_ARG_STRLEN. There is no documentation for this parameter other than the comments in binfmts.h: /* * These are the maximum length and maximum number of strings...

Bulk rename, change prefix

I'd say the simplest it to just use the rename command which is common on many Linux distributions. There are two common versions of this command so check its man page to find which one you have: ## rename from Perl (common in Debian systems -- Ubuntu, Mint,...

Output from ls has newlines but displays on a single line. Why?

When you pipe the output, ls acts differently. This fact is hidden away in the info documentation: If standard output is a terminal, the output is in columns (sorted vertically) and control characters are output as question marks; otherwise, the output is...

mv: Move file only if destination does not exist

mv -vn file1 file2. This command will do what you want. You can skip -v if you want. -v makes it verbose - mv will tell you that it moved file if it moves it(useful, since there is possibility that file will not be moved) -n moves only if file2 does not exist....

Is it possible to store and query JSON in SQLite?

SQLite 3.9 introduced a new extension (JSON1) that allows you to easily work with JSON data . Also, it introduced support for indexes on expressions, which (in my understanding) should allow you to define indexes on your JSON data as well. PostgreSQL has some...

Combining tail && journalctl

You could use: journalctl -u service-name -f -f, --follow Show only the most recent journal entries, and continuously print new entries as they are appended to the journal. Here I've added "service-name" to distinguish this answer from others; you substitute...

how can shellshock be exploited over SSH?

One example where this can be exploited is on servers with an authorized_keys forced command. When adding an entry to ~/.ssh/authorized_keys, you can prefix the line with command="foo" to force foo to be run any time that ssh public key is used. With this...

Why doesn’t the tilde (~) expand inside double quotes?

The reason, because inside double quotes, tilde ~ has no special meaning, it's treated as literal. POSIX defines Double-Quotes as: Enclosing characters in double-quotes ( "" ) shall preserve the literal value of all characters within the double-quotes, with the...

What is GNU Info for?

GNU Info was designed to offer documentation that was comprehensive, hyperlinked, and possible to output to multiple formats. Man pages were available, and they were great at providing printed output. However, they were designed such that each man page had a...

Set systemd service to execute after fstab mount

a CIFS network location is mounted via /etc/fstab to /mnt/ on boot-up. No, it is not. Get this right, and the rest falls into place naturally. The mount is handled by a (generated) systemd mount unit that will be named something like mnt-wibble.mount. You can...

Merge two video clips into one, placing them next to each other

To be honest, using the accepted answer resulted in a lot of dropped frames for me. However, using the hstack filter_complex produced perfectly fluid output: ffmpeg -i left.mp4 -i right.mp4 -filter_complex hstack output.mp4 ffmpeg -i input1.mp4 -i input2.mp4...

How portable are /dev/stdin, /dev/stdout and /dev/stderr?

It's been available on Linux back into its prehistory. It is not POSIX, although many actual shells (including AT&T ksh and bash) will simulate it if it's not present in the OS; note that this simulation only works at the shell level (i.e. redirection or...

How can I increase the number of inodes in an ext4 filesystem?

It seems that you have a lot more files than normal expectation. I don't know whether there is a solution to change the inode table size dynamically. I'm afraid that you need to back-up your data, and create new filesystem, and restore your data. To create new...

Why doesn’t cp have a progress bar like wget?

The tradition in unix tools is to display messages only if something goes wrong. I think this is both for design and practical reasons. The design is intended to make it obvious when something goes wrong: you get an error message, and it's not drowned in...