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From Dennis Putnam <d...@bellsouth.net>
Subject [users@httpd] Re: MySQL authentication and SSL Config problem
Date Wed, 03 Dec 2014 12:39:09 GMT
After a bit more experimenting I found some additional information that
may shed some light on this. I think this is actually a bug. I created
another directory that uses AuthUserFile and that works as expected with
SSL.

<Directory "/var/www/html/backupmgr/">
                AuthType Basic
                AuthName "Backup Manager Administration"
                AuthUserFile "/var/www/passwords"
                Require valid-user
</Directory>

It seems reasonable to assume this problem is specific to combining
MySQL DBD authentication with SSL since both work independent of each
other. I don't believe this is a configuration problem any more and will
be submitted as a bug.

On 12/2/2014 9:15 AM, Dennis Putnam wrote:
> I have a directory set up to do MySQL authentication. At the same time I
> want to encrypt pages in that directory. My config for that virtual host is:
>
> LoadModule dbd_module modules/mod_dbd.so
> LoadModule authn_dbd_module modules/mod_authn_dbd.so
> <VirtualHost *:80>
>         DocumentRoot "/var/www/html"
>         ServerName myhost.mydomain.com
>         ServerAdmin mailman-owner@mydomain.com
>         ErrorLog "/var/log/httpd/myhost_error_log"
>         CustomLog "/var/log/httpd/myhost_access_log" combined
>
> # Force SSL for certain directories
>         RewriteEngine Off
>         RewriteLogLevel 0
>         RewriteLog "/var/log/httpd/rewrite_log"
>         RewriteCond %{HTTPS} off [NC]
>         RewriteRule ^/mailman(/.*)$ https://%{HTTP_HOST}/mailman$1 [R,L]
>         RewriteRule ^/cufs(/.*)$ https://%{HTTP_HOST}/cufs$1 [R,L]
>
>         <IfModule mod_dbd.c>
>                 DBDriver mysql
>                 DBDParams "dbname=cufsalumni user=myuser pass=xxxxxxx"
>                 DBDMin 1
>                 DBDKeep 8
>                 DBDMax 20
>         </IfModule>
>
>         <Directory "/var/www/html/cufs/cufsauth/">
>                 AuthName "CUFS Alumni Login"
>                 AuthType Basic
>                 require valid-user
>                 AuthBasicProvider dbd
>                 AuthDBDUserPWQuery "SELECT pwd FROM cufsalumni.alumni
> WHERE us
> ername=%s"
>         </Directory>
>
> </VirtualHost>
>
> As long as I turn off the rewrite engine authentication works fine but
> the pages are obviously unencrypted. However, when I turn it on,
> authentication is bypassed and the loaded PHP page, rather than
> rendering, dumps a lot of $_SERVER variables which have little meaning
> and ends with the string "Fatal: 1." That should mean something but I
> can't find what. If it matters, the encryption for the mailman directory
> works fine except it does its own authentication so the certificates
> would seem to be fine. The problem seems to be combining MySQL
> authentication with SSL. Here is the ssl.conf file:
>
> #
> # This is the Apache server configuration file providing SSL support.
> # It contains the configuration directives to instruct the server how to
> # serve pages over an https connection. For detailing information about
> these
> # directives see <URL:http://httpd.apache.org/docs/2.2/mod/mod_ssl.html>
> #
> # Do NOT simply read the instructions in here without understanding
> # what they do.  They're here only as hints or reminders.  If you are unsure
> # consult the online docs. You have been warned.
> #
>
> LoadModule ssl_module modules/mod_ssl.so
>
> #
> # When we also provide SSL we have to listen to the
> # the HTTPS port in addition.
> #
> Listen 443
>
> ##
> ##  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  builtin
>
> #   Inter-Process Session Cache:
> #   Configure the SSL Session Cache: First the mechanism
> #   to use and second the expiring timeout (in seconds).
> SSLSessionCache         shmcb:/var/cache/mod_ssl/scache(512000)
> SSLSessionCacheTimeout  300
>
> #   Semaphore:
> #   Configure the path to the mutual exclusion semaphore the
> #   SSL engine uses internally for inter-process synchronization.
> SSLMutex default
>
> #   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
> ##
>
> <VirtualHost _default_:443>
>
> # General setup for the virtual host, inherited from global configuration
> #DocumentRoot "/var/www/html"
> #ServerName www.example.com:443
>
> # Use separate log files for the SSL virtual host; note that LogLevel
> # is not inherited from httpd.conf.
> ErrorLog /var/log/httpd/ssl_error_log
> TransferLog /var/log/httpd/ssl_access_log
> LogLevel warn
>
> #   SSL Engine Switch:
> #   Enable/Disable SSL for this virtual host.
> SSLEngine on
>
> #   SSL Protocol support:
> # List the enable protocol levels with which clients will be able to
> # connect.  Disable SSLv2 access by default:
> SSLProtocol all -SSLv2
>
> #   SSL Cipher Suite:
> # List the ciphers that the client is permitted to negotiate.
> # See the mod_ssl documentation for a complete list.
> SSLCipherSuite ALL:!ADH:!EXPORT:!SSLv2:RC4+RSA:+HIGH:+MEDIUM:+LOW
>
> #   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 /etc/httpd/ssl.crt/server.crt
>
> #   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 /etc/httpd/ssl.crt/server.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 /etc/httpd/ssl.crt/server.crt
>
> #   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)
> #SSLCACertificateFile /etc/httpd/ssl.crt/ca.crt
>
> #   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>
>
> #   SSL Protocol Adjustments:
> #   The safe and default but still SSL/TLS standard compliant shutdown
> #   approach is that mod_ssl sends the close notify alert but doesn't
> wait for
> #   the close notify alert from client. When you need a different shutdown
> #   approach you can use one of the following variables:
> #   o ssl-unclean-shutdown:
> #     This forces an unclean shutdown when the connection is closed, i.e. no
> #     SSL close notify alert is send or allowed to received.  This violates
> #     the SSL/TLS standard but is needed for some brain-dead browsers. Use
> #     this when you receive I/O errors because of the standard approach
> where
> #     mod_ssl sends the close notify alert.
> #   o ssl-accurate-shutdown:
> #     This forces an accurate shutdown when the connection is closed, i.e. a
> #     SSL close notify alert is send and mod_ssl waits for the close notify
> #     alert of the client. This is 100% SSL/TLS standard compliant, but in
> #     practice often causes hanging connections with brain-dead
> browsers. Use
> #     this only for browsers where you know that their SSL implementation
> #     works correctly.
> #   Notice: Most problems of broken clients are also related to the HTTP
> #   keep-alive facility, so you usually additionally want to disable
> #   keep-alive for those clients, too. Use variable "nokeepalive" for this.
> #     SSL close notify alert is send and mod_ssl waits for the close notify
> #     alert of the client. This is 100% SSL/TLS standard compliant, but in
> #     practice often causes hanging connections with brain-dead
> browsers. Use
> #     this only for browsers where you know that their SSL implementation
> #     works correctly.
> #   Notice: Most problems of broken clients are also related to the HTTP
> #   keep-alive facility, so you usually additionally want to disable
> #   keep-alive for those clients, too. Use variable "nokeepalive" for this.
> #   Similarly, one has to force some clients to use HTTP/1.0 to workaround
> #   their broken HTTP/1.1 implementation. Use variables "downgrade-1.0" and
> #   "force-response-1.0" for this.
> SetEnvIf User-Agent ".*MSIE.*" \
>          nokeepalive ssl-unclean-shutdown \
>          downgrade-1.0 force-response-1.0
>
> #   Per-Server Logging:
> #   The home of a custom SSL log file. Use this when you want a
> #   compact non-error SSL logfile on a virtual host basis.
> CustomLog logs/ssl_request_log \
>           "%t %h %{SSL_PROTOCOL}x %{SSL_CIPHER}x \"%r\" %b"
>
> </VirtualHost>
>
> Apologies for including all the comments but I did not want to
> inadvertently omit something important. Hopefully someone can spot the
> error in my config and help me correct it. TIA.
>



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