SSLのテスト用に、MacPortsでインストールしたApacheにSSLの設定をした。
conf/httpd.conf

# Secure (SSL/TLS) connections
Include conf/extra/httpd-ssl.conf

秘密鍵と証明書ファイルのパスの設定を確認。（デフォルトのまま使用することにする。）
conf/extra/httpd-ssl.conf

#   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.  Keep
#   in mind that if you have both an RSA and a DSA certificate you
#   can configure both in parallel (to also allow the use of DSA
#   ciphers, etc.)
SSLCertificateFile "/opt/local/apache2/conf/server.crt"
#SSLCertificateFile "/opt/local/apache2/conf/server-dsa.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 "/opt/local/apache2/conf/server.key"
#SSLCertificateKeyFile "/opt/local/apache2/conf/server-dsa.key"

秘密鍵の作成。

$ cd /opt/local/apache2/conf/
$ sudo openssl genrsa -out server.key 2048
Generating RSA private key, 2048 bit long modulus
.......................+++
..+++
e is 65537 (0x10001)

自己証明書を作成。

$ sudo openssl req -new -x509 -days 3650 -sha256 -key server.key -out server.crt
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [AU]:JP
State or Province Name (full name) [Some-State]:Tokyo
Locality Name (eg, city) []:
Organization Name (eg, company) [Internet Widgits Pty Ltd]:
Organizational Unit Name (eg, section) []:
Common Name (e.g. server FQDN or YOUR name) []:*.example.com
Email Address []:

$ sudo port install apache2
Password:
--->  Fetching pcre
--->  Attempting to fetch pcre-7.7.tar.bz2 from ftp://ftp.fu-berlin.de/unix/misc/pcre/
--->  Verifying checksum(s) for pcre
--->  Extracting pcre
--->  Configuring pcre
--->  Building pcre with target all
--->  Staging pcre into destroot
--->  Installing pcre 7.7_0
--->  Activating pcre 7.7_0
--->  Cleaning pcre
--->  Fetching apache2
--->  Attempting to fetch httpd-2.2.9.tar.bz2 from http://www.apache.org/dist/httpd
--->  Verifying checksum(s) for apache2
--->  Extracting apache2
--->  Configuring apache2
--->  Building apache2 with target all
--->  Staging apache2 into destroot
--->  Creating launchd control script
###########################################################
# A startup item has been generated that will aid in
# starting apache2 with launchd. It is disabled
# by default. Execute the following command to start it,
# and to cause it to launch at startup:
#
# sudo launchctl load -w /Library/LaunchDaemons/org.macports.apache2.plist
###########################################################
Warning: apache2 requests to install files outside the common directory structure!
--->  Installing apache2 2.2.9_1+darwin_9
--->  Activating apache2 2.2.9_1+darwin_9
--->  Cleaning apache2

メッセージにある通り、自動起動を設定。

$ sudo launchctl load -w /Library/LaunchDaemons/org.macports.apache2.plist

httpd.confを添付されているサンプルからコピーする。

$ sudo cp /opt/local/apache2/conf/httpd.conf.sample /opt/local/apache2/conf/httpd.conf

apachectlなどへのパスを通すため、.bash_profileなどで$PATHに
/opt/local/apache2/bin
を追加しておく。