roles/apache: Role to deploy Apache HTTPD

The *apache* role installs and configures the Apache HTTPD server and
its *mod_ssl* module. It currently only works on Fedora/RHEL-based
distributions.

roles/apache/templates/ssl.conf.j2

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+#
+# When we also provide SSL we have to listen to the 
+# the HTTPS port in addition.
+#
+Listen {{ apache_ssl_listen_port }} https
+
+##
+##  SSL Global Context
+##
+##  All SSL configuration in this context applies both to
+##  the main server and all SSL-enabled virtual hosts.
+##
+
+#   Pass Phrase Dialog:
+#   Configure the pass phrase gathering process.
+#   The filtering dialog program (`builtin' is a internal
+#   terminal dialog) has to provide the pass phrase on stdout.
+SSLPassPhraseDialog exec:/usr/libexec/httpd-ssl-pass-dialog
+
+#   Inter-Process Session Cache:
+#   Configure the SSL Session Cache: First the mechanism 
+#   to use and second the expiring timeout (in seconds).
+SSLSessionCache         shmcb:/run/httpd/sslcache(512000)
+SSLSessionCacheTimeout  300
+
+#   Pseudo Random Number Generator (PRNG):
+#   Configure one or more sources to seed the PRNG of the 
+#   SSL library. The seed data should be of good random quality.
+#   WARNING! On some platforms /dev/random blocks if not enough entropy
+#   is available. This means you then cannot use the /dev/random device
+#   because it would lead to very long connection times (as long as
+#   it requires to make more entropy available). But usually those
+#   platforms additionally provide a /dev/urandom device which doesn't
+#   block. So, if available, use this one instead. Read the mod_ssl User
+#   Manual for more details.
+SSLRandomSeed startup file:/dev/urandom  256
+SSLRandomSeed connect builtin
+#SSLRandomSeed startup file:/dev/random  512
+#SSLRandomSeed connect file:/dev/random  512
+#SSLRandomSeed connect file:/dev/urandom 512
+
+#
+# Use "SSLCryptoDevice" to enable any supported hardware
+# accelerators. Use "openssl engine -v" to list supported
+# engine names.  NOTE: If you enable an accelerator and the
+# server does not start, consult the error logs and ensure
+# your accelerator is functioning properly. 
+#
+SSLCryptoDevice builtin
+#SSLCryptoDevice ubsec
+
+##
+## SSL Virtual Host Context
+##
+
+{% if apache_default_ssl_vhost|bool %}
+<VirtualHost _default_:{{ apache_ssl_listen_port }}>
+
+# General setup for the virtual host, inherited from global configuration
+#DocumentRoot "/var/www/html"
+#ServerName www.example.com:443
+
+Include conf.d/ssl.include
+
+#   Server Certificate:
+# Point SSLCertificateFile at a PEM encoded certificate.  If
+# the certificate is encrypted, then you will be prompted for a
+# pass phrase.  Note that a kill -HUP will prompt again.  A new
+# certificate can be generated using the genkey(1) command.
+SSLCertificateFile {{ apache_ssl_certificate }}
+
+#   Server Private Key:
+#   If the key is not combined with the certificate, use this
+#   directive to point at the key file.  Keep in mind that if
+#   you've both a RSA and a DSA private key you can configure
+#   both in parallel (to also allow the use of DSA ciphers, etc.)
+SSLCertificateKeyFile {{ apache_ssl_certificate_key }}
+
+#   Server Certificate Chain:
+#   Point SSLCertificateChainFile at a file containing the
+#   concatenation of PEM encoded CA certificates which form the
+#   certificate chain for the server certificate. Alternatively
+#   the referenced file can be the same as SSLCertificateFile
+#   when the CA certificates are directly appended to the server
+#   certificate for convinience.
+SSLCertificateChainFile {{ apache_ssl_certificate }}
+
+#   Certificate Authority (CA):
+#   Set the CA certificate verification path where to find CA
+#   certificates for client authentication or alternatively one
+#   huge file containing all of them (file must be PEM encoded)
+{% if apache_ssl_ca_certificate is defined %}
+SSLCACertificateFile {{ apache_ssl_ca_certificate }}
+{% else %}
+#SSLCACertificateFile /etc/pki/tls/certs/ca-bundle.crt
+{% endif %}
+
+#   Client Authentication (Type):
+#   Client certificate verification type and depth.  Types are
+#   none, optional, require and optional_no_ca.  Depth is a
+#   number which specifies how deeply to verify the certificate
+#   issuer chain before deciding the certificate is not valid.
+#SSLVerifyClient require
+#SSLVerifyDepth  10
+
+#   Access Control:
+#   With SSLRequire you can do per-directory access control based
+#   on arbitrary complex boolean expressions containing server
+#   variable checks and other lookup directives.  The syntax is a
+#   mixture between C and Perl.  See the mod_ssl documentation
+#   for more details.
+#<Location />
+#SSLRequire (    %{SSL_CIPHER} !~ m/^(EXP|NULL)/ \
+#            and %{SSL_CLIENT_S_DN_O} eq "Snake Oil, Ltd." \
+#            and %{SSL_CLIENT_S_DN_OU} in {"Staff", "CA", "Dev"} \
+#            and %{TIME_WDAY} >= 1 and %{TIME_WDAY} <= 5 \
+#            and %{TIME_HOUR} >= 8 and %{TIME_HOUR} <= 20       ) \
+#           or %{REMOTE_ADDR} =~ m/^192\.76\.162\.[0-9]+$/
+#</Location>
+
+#   SSL Engine Options:
+#   Set various options for the SSL engine.
+#   o FakeBasicAuth:
+#     Translate the client X.509 into a Basic Authorisation.  This means that
+#     the standard Auth/DBMAuth methods can be used for access control.  The
+#     user name is the `one line' version of the client's X.509 certificate.
+#     Note that no password is obtained from the user. Every entry in the user
+#     file needs this password: `xxj31ZMTZzkVA'.
+#   o ExportCertData:
+#     This exports two additional environment variables: SSL_CLIENT_CERT and
+#     SSL_SERVER_CERT. These contain the PEM-encoded certificates of the
+#     server (always existing) and the client (only existing when client
+#     authentication is used). This can be used to import the certificates
+#     into CGI scripts.
+#   o StdEnvVars:
+#     This exports the standard SSL/TLS related `SSL_*' environment variables.
+#     Per default this exportation is switched off for performance reasons,
+#     because the extraction step is an expensive operation and is usually
+#     useless for serving static content. So one usually enables the
+#     exportation for CGI and SSI requests only.
+#   o StrictRequire:
+#     This denies access when "SSLRequireSSL" or "SSLRequire" applied even
+#     under a "Satisfy any" situation, i.e. when it applies access is denied
+#     and no other module can change it.
+#   o OptRenegotiate:
+#     This enables optimized SSL connection renegotiation handling when SSL
+#     directives are used in per-directory context. 
+#SSLOptions +FakeBasicAuth +ExportCertData +StrictRequire
+<Files ~ "\.(cgi|shtml|phtml|php3?)$">
+    SSLOptions +StdEnvVars
+</Files>
+<Directory "/var/www/cgi-bin">
+    SSLOptions +StdEnvVars
+</Directory>
+
+</VirtualHost>                                  
+
+{% else %}
+# The default SSL virtual host is not used on this system. Another
+# configuration file likely defines a VirtualHost container.
+{% endif %}