Curl Certificate Error when Using RVM to install Ruby 1.9.2

Question

RVM is running into a certificate error when trying to download Ruby 1.9.2. It looks like curl is having a certificate issue but I am not sure how to bypass it. I have included the exact error info below.

$ rvm install 1.9.2
Installing Ruby from source to: /Users/willdennis/.rvm/rubies/ruby-1.9.2-p180, this may take a while depending on your cpu(s)...

ruby-1.9.2-p180 - #fetching 
ERROR: Error running 'bunzip2 '/Users/willdennis/.rvm/archives/ruby-1.9.2-p180.tar.bz2'', please read /Users/willdennis/.rvm/log/ruby-1.9.2-p180/extract.log
ruby-1.9.2-p180 - #extracting ruby-1.9.2-p180 to /Users/willdennis/.rvm/src/ruby-1.9.2-p180
ruby-1.9.2-p180 - #extracted to /Users/willdennis/.rvm/src/ruby-1.9.2-p180
Fetching yaml-0.1.3.tar.gz to /Users/willdennis/.rvm/archives

curl: (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). The default
 bundle is named curl-ca-bundle.crt; 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.
ERROR: There was an error, please check /Users/willdennis/.rvm/log/ruby-1.9.2-p180/*.log. Next we'll try to fetch via http.
Trying http:// URL instead.

curl: (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). The default
 bundle is named curl-ca-bundle.crt; 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.
ERROR: There was an error, please check /Users/willdennis/.rvm/log/ruby-1.9.2-p180/*.log
Extracting yaml-0.1.3.tar.gz to /Users/willdennis/.rvm/src
ERROR: Error running 'tar zxf /Users/willdennis/.rvm/archives/yaml-0.1.3.tar.gz -C /Users/willdennis/.rvm/src --no-same-owner', please read /Users/willdennis/.rvm/log/ruby-1.9.2-p180/yaml/extract.log
/Users/willdennis/.rvm/scripts/functions/packages: line 55: cd: /Users/willdennis/.rvm/src/yaml-0.1.3: No such file or directory
Configuring yaml in /Users/willdennis/.rvm/src/yaml-0.1.3.
ERROR: Error running ' ./configure --prefix="/Users/willdennis/.rvm/usr"  ', please read /Users/willdennis/.rvm/log/ruby-1.9.2-p180/yaml/configure.log
Compiling yaml in /Users/willdennis/.rvm/src/yaml-0.1.3.
ERROR: Error running '/usr/bin/make ', please read /Users/willdennis/.rvm/log/ruby-1.9.2-p180/yaml/make.log
Installing yaml to /Users/willdennis/.rvm/usr
ERROR: Error running '/usr/bin/make install', please read /Users/willdennis/.rvm/log/ruby-1.9.2-p180/yaml/make.install.log
ruby-1.9.2-p180 - #configuring 
ERROR: Error running ' ./configure --prefix=/Users/willdennis/.rvm/rubies/ruby-1.9.2-p180 --enable-shared --disable-install-doc --with-libyaml-dir=/Users/willdennis/.rvm/usr ', please read /Users/willdennis/.rvm/log/ruby-1.9.2-p180/configure.log
ERROR: There has been an error while running configure. Halting the installation.

How can I resolve or avoid this error?

Answer 1

In case any one else comes across this while trying to update to 1.9.3 (although version probably doesn't matter), check the version of rvm that you have. Wayne seems to have moved from rvm.beginrescueend.com to rvm.io. The old site's security certificate has expired, so curl's response is correct.

Updating rvm from the new site fixed this problem and allowed me to move forward.

$ \curl -L https://get.rvm.io | bash -s stable --rails --autolibs=enabled

Update: As @rodgerdpack mentioned, the command changes and I've updated the above. In general, see https://rvm.io/ for the latest.

Answer 2

If do not want to change the script AND you do not want to add a cert "for ever" to the cert bundle. There is a very nice and quick solution:

#to download the cert
wget http://curl.haxx.se/ca/cacert.pem
#to let curl use it for the next calls
export CURL_CA_BUNDLE=~/cacert.pem

Then run your script. To reset the environment variable (for subsequent script calls that should not use this cert) re-login to your system or unset the environment variable:

export CURL_CA_BUNDLE=