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ff14d523bb
and enable the usage by sendmail if sendmail is enabled. Include and document knobs to disable this feature and also set the Common Name of the certificate created. As the certificate is signed w/ a discarded key, it only helps prevent Eve, but not Malory from knowing the contents of the emails. This means that new installs (and people that use the updated freebsd.mc file) will automaticly have STARTTLS enabled allowing incoming email to be encrypted in most cases. Reviewed by: gshapiro MFC after: 3 days Security: Yes, please.
222 lines
6.2 KiB
Bash
Executable File
222 lines
6.2 KiB
Bash
Executable File
#!/bin/sh
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#
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# $FreeBSD$
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#
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# PROVIDE: mail
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# REQUIRE: LOGIN FILESYSTEMS
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# we make mail start late, so that things like .forward's are not
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# processed until the system is fully operational
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# KEYWORD: shutdown
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# XXX - Get together with sendmail mantainer to figure out how to
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# better handle SENDMAIL_ENABLE and 3rd party MTAs.
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#
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. /etc/rc.subr
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name="sendmail"
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rcvar="sendmail_enable"
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required_files="/etc/mail/${name}.cf"
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start_precmd="sendmail_precmd"
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load_rc_config $name
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command=${sendmail_program:-/usr/sbin/${name}}
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pidfile=${sendmail_pidfile:-/var/run/${name}.pid}
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procname=${sendmail_procname:-/usr/sbin/${name}}
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CERTDIR=/etc/mail/certs
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case ${sendmail_enable} in
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[Nn][Oo][Nn][Ee])
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sendmail_enable="NO"
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sendmail_submit_enable="NO"
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sendmail_outbound_enable="NO"
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sendmail_msp_queue_enable="NO"
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;;
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esac
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# If sendmail_enable=yes, don't need submit or outbound daemon
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if checkyesno sendmail_enable; then
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sendmail_submit_enable="NO"
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sendmail_outbound_enable="NO"
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fi
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# If sendmail_submit_enable=yes, don't need outbound daemon
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if checkyesno sendmail_submit_enable; then
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sendmail_outbound_enable="NO"
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fi
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sendmail_cert_create()
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{
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cnname="${sendmail_cert_cn:-`hostname`}"
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cnname="${cnname:-amnesiac}"
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# based upon:
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# http://www.sendmail.org/~ca/email/other/cagreg.html
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CAdir=`mktemp -d` &&
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certpass=`(date; ps ax ; hostname) | md5 -q`
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# make certificate authority
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( cd "$CAdir" &&
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chmod 700 "$CAdir" &&
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mkdir certs crl newcerts &&
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echo "01" > serial &&
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:> index.txt &&
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cat <<-OPENSSL_CNF > openssl.cnf &&
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RANDFILE = $CAdir/.rnd
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[ ca ]
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default_ca = CA_default
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[ CA_default ]
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dir = .
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certs = \$dir/certs # Where the issued certs are kept
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crl_dir = \$dir/crl # Where the issued crl are kept
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database = \$dir/index.txt # database index file.
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new_certs_dir = \$dir/newcerts # default place for new certs.
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certificate = \$dir/cacert.pem # The CA certificate
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serial = \$dir/serial # The current serial number
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crlnumber = \$dir/crlnumber # the current crl number
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crl = \$dir/crl.pem # The current CRL
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private_key = \$dir/cakey.pem
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x509_extensions = usr_cert # The extentions to add to the cert
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name_opt = ca_default # Subject Name options
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cert_opt = ca_default # Certificate field options
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default_days = 365 # how long to certify for
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default_crl_days= 30 # how long before next CRL
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default_md = default # use public key default MD
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preserve = no # keep passed DN ordering
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policy = policy_anything
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[ policy_anything ]
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countryName = optional
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stateOrProvinceName = optional
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localityName = optional
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organizationName = optional
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organizationalUnitName = optional
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commonName = supplied
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emailAddress = optional
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[ req ]
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default_bits = 2048
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default_keyfile = privkey.pem
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distinguished_name = req_distinguished_name
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attributes = req_attributes
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x509_extensions = v3_ca # The extentions to add to the self signed cert
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string_mask = utf8only
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prompt = no
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[ req_distinguished_name ]
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countryName = XX
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stateOrProvinceName = Some-state
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localityName = Some-city
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0.organizationName = Some-org
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CN = $cnname
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[ req_attributes ]
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challengePassword = foobar
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unstructuredName = An optional company name
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[ usr_cert ]
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basicConstraints=CA:FALSE
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nsComment = "OpenSSL Generated Certificate"
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subjectKeyIdentifier=hash
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authorityKeyIdentifier=keyid,issuer
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[ v3_req ]
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basicConstraints = CA:FALSE
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keyUsage = nonRepudiation, digitalSignature, keyEncipherment
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[ v3_ca ]
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subjectKeyIdentifier=hash
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authorityKeyIdentifier=keyid:always,issuer
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basicConstraints = CA:true
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OPENSSL_CNF
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# though we use a password, the key is discarded and never used
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openssl req -batch -passout pass:"$certpass" -new -x509 \
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-keyout cakey.pem -out cacert.pem -days 3650 \
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-config openssl.cnf -newkey rsa:2048 >/dev/null 2>&1 &&
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# make new certificate
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openssl req -batch -nodes -new -x509 -keyout newkey.pem \
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-out newreq.pem -days 365 -config openssl.cnf \
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-newkey rsa:2048 >/dev/null 2>&1 &&
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# sign certificate
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openssl x509 -x509toreq -in newreq.pem -signkey newkey.pem \
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-out tmp.pem >/dev/null 2>&1 &&
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openssl ca -notext -config openssl.cnf \
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-out newcert.pem -keyfile cakey.pem -cert cacert.pem \
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-key "$certpass" -batch -infiles tmp.pem >/dev/null 2>&1 &&
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mkdir -p "$CERTDIR" &&
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chmod 0755 "$CERTDIR" &&
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chmod 644 newcert.pem cacert.pem &&
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chmod 600 newkey.pem &&
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cp -p newcert.pem "$CERTDIR"/host.cert &&
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cp -p cacert.pem "$CERTDIR"/cacert.pem &&
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cp -p newkey.pem "$CERTDIR"/host.key &&
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ln -s cacert.pem "$CERTDIR"/`openssl x509 -hash -noout \
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-in cacert.pem`.0)
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retVal="$?"
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rm -rf "$CAdir"
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return "$retVal"
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}
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sendmail_precmd()
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{
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# Die if there's pre-8.10 custom configuration file. This check is
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# mandatory for smooth upgrade. See NetBSD PR 10100 for details.
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#
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if checkyesno ${rcvar} && [ -f "/etc/${name}.cf" ]; then
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if ! cmp -s "/etc/mail/${name}.cf" "/etc/${name}.cf"; then
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warn \
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"${name} was not started; you have multiple copies of sendmail.cf."
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return 1
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fi
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fi
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# check modifications on /etc/mail/aliases
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if checkyesno sendmail_rebuild_aliases; then
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if [ -f "/etc/mail/aliases.db" ]; then
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if [ "/etc/mail/aliases" -nt "/etc/mail/aliases.db" ]; then
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echo \
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"${name}: /etc/mail/aliases newer than /etc/mail/aliases.db, regenerating"
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/usr/bin/newaliases
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fi
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else
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echo \
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"${name}: /etc/mail/aliases.db not present, generating"
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/usr/bin/newaliases
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fi
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fi
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if checkyesno sendmail_cert_create && [ ! \( \
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-f "$CERTDIR/host.cert" -o -f "$CERTDIR/host.key" -o \
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-f "$CERTDIR/cacert.pem" \) ]; then
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if ! openssl version >/dev/null 2>&1; then
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warn "OpenSSL not available, but sendmail_cert_create is YES."
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else
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info Creating certificate for sendmail.
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sendmail_cert_create
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fi
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fi
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}
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run_rc_command "$1"
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required_files=
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if checkyesno sendmail_submit_enable; then
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name="sendmail_submit"
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rcvar="sendmail_submit_enable"
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run_rc_command "$1"
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fi
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if checkyesno sendmail_outbound_enable; then
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name="sendmail_outbound"
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rcvar="sendmail_outbound_enable"
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run_rc_command "$1"
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fi
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name="sendmail_msp_queue"
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rcvar="sendmail_msp_queue_enable"
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pidfile="${sendmail_msp_queue_pidfile:-/var/spool/clientmqueue/sm-client.pid}"
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required_files="/etc/mail/submit.cf"
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run_rc_command "$1"
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