使用 pam_mysql 的 Postfix SMTP SASL 身份驗證不能接受電子郵件地址作為使用者名

我目前正在嘗試一個項目來更新現有的後綴部署。我在針對 smtp 對使用者進行身份驗證時遇到問題。

我遇到的主要問題是我們的後綴使用者數據庫是完全合格的（email@domain.com）。但是，當嘗試使用 AUTH PLAIN 進行身份驗證時，@ 符號以及 . 被截斷。如果我用 testaslauth 測試一個使用者帳戶，我會得到一個成功的結果。

我遇到的第二個問題實際上是了解 saslauth 和 pam 服務在哪裡使用它們各自的 mysql 配置。我已經閱讀了許多關於如何設置的文章，但我不清楚我是否需​​要這些配置中的一種、另一種或兩種配置。

以下是我可以立即發布的所有相關配置/日誌記錄（注意：系統、域和使用者名已被清理）：

作業系統版本：

mose@postfix ~ $ cat /etc/redhat-release 
CentOS Linux release 7.4.1708 (Core)

後綴版本：

mose@postfix ~ $ postconf -v | grep 'mail_version = '
postconf: $smtpd_tls_security_level in main.cf validates smtpd_tls_security_level=value in master.cf:submission.inet
mail_version = 2.10.1

成功測試來自 cli 的憑據：

mose@postfix ~ $ testsaslauthd -u mose@example.com -p password -s smtp
0: OK "Success."

通過 telnet 驗證失敗：

mose@postfix ~ $ openssl s_client -starttls smtp -crlf -connect postfix.example.com:587
<SSL Output truncated for brevity>
EHLO example.com
250-postfix.example.com
250-PIPELINING
250-SIZE 10240000
250-ETRN
250-AUTH PLAIN LOGIN CRAM-MD5 DIGEST-MD5
250-AUTH=PLAIN LOGIN CRAM-MD5 DIGEST-MD5
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
AUTH PLAIN bW9zZS5jb20AbW9zZS5jb20AcGFzc3dvcmQ=
535 5.7.8 Error: authentication failed: authentication failure

記錄，請注意我將使用者名傳遞為 mose@example.com，但是 mysql 查找將其顯示為“mose.com@example.com”：

mose@postfix ~ $ sudo tail /var/log/secure
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - option verbose is set to "1"
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - option users.host is set to "localhost"
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - option users.database is set to "postfix"
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - option users.db_user is set to "mysql"
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - option users.db_passwd is set to "password"
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - option users.password_crypt is set to "1"
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - option users.table is set to "mailboxes"
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - option users.where_clause is set to "status = 1"
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - option users.user_column is set to "login"
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - option users.password_column is set to "password"
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_sm_authenticate() called.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_open_db() called.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_open_db() returning 0.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_check_passwd() called.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_format_string() called
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_quick_escape() called.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - SELECT password FROM mailboxes WHERE login = 'mose.com@example.com' AND (status = 1)
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - SELECT returned no result.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_check_passwd() returning 1.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_sql_log() called.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_sql_log() returning 0.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_converse() called.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_open_db() called.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_check_passwd() called.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_format_string() called
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_quick_escape() called.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - SELECT password FROM mailboxes WHERE login = 'mose.com@example.com' AND (status = 1)
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - SELECT returned no result.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_check_passwd() returning 1.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_sql_log() called.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_sql_log() returning 0.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_sm_authenticate() returning 10.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_release_ctx() called.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_destroy_ctx() called.
Jan 16 17:53:42 postfix saslauthd[7437]: pam_mysql - pam_mysql_close_db() called.

SASLAuthD 配置為使用 PAM：

mose@postfix ~ $ sudo grep -v \# /etc/sysconfig/saslauthd
SOCKETDIR=/run/saslauthd
MECH=pam
FLAGS="-r"

SMTPD 配置為使用 MySQL 外掛：

mose@postfix ~ $ ll /etc/postfix/sasl/smtpd.conf
lrwxrwxrwx 1 root root 21 Jan 11 17:24 /etc/postfix/sasl/smtpd.conf -> /etc/sasl2/smtpd.conf

mose@postfix ~ $ sudo cat /etc/sasl2/smtpd.conf
pwcheck_method: saslauthd
mech_list: plain login cram-md5 digest-md5
allow_plaintext: true
auxprop_plugin: sql
sql_engine: mysql
sql_hostnames: localhost
sql_user: mysql 
sql_passwd: password 
sql_database: postfix
sql_verbose: yes
sql_select: select password from mailboxes where login = '%u@%r' and status='1'
sql_usessl: no
log_level: 3

PAM 配置為使用 MySQL：

mose@postfix ~ $ sudo cat /etc/pam.d/smtp
#%PAM-1.0
auth       required     pam_nologin.so
auth       sufficient   pam_mysql.so config_file=/etc/postfix/mysql/pam.conf
account    sufficient   pam_mysql.so config_file=/etc/postfix/mysql/pam.conf
password   required     pam_deny.so

mose@postfix ~ $ sudo cat /etc/postfix/mysql/pam.conf
verbose = 1;
users.host = localhost;
users.database = postfix;
users.db_user = mysql;
users.db_passwd = password;
users.password_crypt = 1;
users.table = postfix_mailboxes;
users.where_clause = status = 1;
users.user_column = login;
users.password_column = password;

完整的後綴配置轉儲：

mose@postfix ~ $ sudo postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd $daemon_directory/$process_name $process_id & sleep 5
disable_vrfy_command = yes
html_directory = no
inet_interfaces = $myhostname, localhost, 10.100.0.11
inet_protocols = ipv4
local_recipient_maps =
mail_owner = postfix
mailbox_command = procmail -a "$EXTENSION"
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
mydestination =
mydomain = example.com
myhostname = postfix.example.com
mynetworks = 127.0.0.0/8, 10.100.0.0/24
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases.postfix
postscreen_access_list = permit_mynetworks, cidr:/etc/postfix/postscreen/access.cidr
postscreen_bare_newline_action = enforce
postscreen_bare_newline_enable = no
postscreen_blacklist_action = drop
postscreen_dnsbl_action = enforce
postscreen_dnsbl_reply_map = pcre:$config_directory/postscreen_dnsbl_reply_map.pcre
postscreen_dnsbl_sites = zen.spamhaus.org*3 b.barracudacentral.org*2 bl.spameatingmonkey.net*2 bl.spamcop.net dnsbl.sorbs.net psbl.surriel.com bl.mailspike.net
postscreen_dnsbl_threshold = 3
postscreen_greet_action = enforce
postscreen_greet_banner = $myhostname [POSTSCREEN] ESMTP $mail_name
postscreen_non_smtp_command_enable = no
postscreen_pipelining_enable = no
postscreen_whitelist_interfaces = static:all
proxy_read_maps = $virtual_mailbox_maps $virtual_alias_maps $virtual_mailbox_domains #$transport_maps
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.10.1/README_FILES
relay_domains =
relayhost =
sample_directory = /usr/share/doc/postfix-2.10.1/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtp_helo_timeout = 5
smtp_host_lookup = native
smtp_sasl_auth_enable = yes
smtpd_banner = $myhostname [SMTPD] ESMTP $mail_name
smtpd_delay_reject = no
smtpd_error_sleep_time = 30
smtpd_hard_error_limit = 20
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, permit
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = no
smtpd_sasl_exceptions_networks = $mynetworks
smtpd_sasl_local_domain = $mydomain
smtpd_sasl_security_options = noanonymous, noplaintext
smtpd_sasl_tls_security_options = noanonymous
smtpd_sasl_type = cyrus
smtpd_sender_restrictions = reject_unknown_sender_domain
smtpd_soft_error_limit = 10
smtpd_tls_CAfile = /etc/postfix/gd_bundle-g2-g1.crt
smtpd_tls_cert_file = /etc/postfix/smtpd.cert
smtpd_tls_key_file = /etc/postfix/smtpd.key
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_security_level = may
smtpd_tls_session_cache_database = btree:/var/lib/postfix/smtpd_scache
smtpd_tls_session_cache_timeout = 10800s
strict_rfc821_envelopes = yes
tls_random_exchange_name = /var/lib/postfix/prng_exch
tls_random_source = dev:/dev/urandom
unknown_local_recipient_reject_code = 550
virtual_alias_domains =
virtual_alias_maps = proxy:mysql:/etc/postfix/mysql/autoreply.cf, proxy:mysql:/etc/postfix/mysql/aliases.cf, proxy:mysql:/etc/postfix/mysql/groups.cf
virtual_gid_maps = static:101
virtual_mailbox_base = /
virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql/domains.cf
virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql/mailboxes.cf
virtual_minimum_uid = 110532
virtual_uid_maps = static:110532

我可以看到我可以在 SASLAuth mysql 設置（%u@%r）中定義使用者格式的位置，但我還沒有看到 pam_mysql 上支持相同的任何文件。

任何幫助表示讚賞。

編輯：在做出他推薦的更改後，我偶然發現了一個有類似問題的人，但是使用者名仍然沒有正確輸入……

pam_mysql 文件

我還對照這篇文章檢查了我的設置，我能看到的唯一區別是我擁有的 pam_mysql 來自以下儲存庫：http: //repo.iotti.biz/CentOS/$releasever

mose@postfix ~ $ sudo yum info pam_mysql --enablerepo=lux
Loaded plugins: fastestmirror, langpacks, product-id, search-disabled-repos, subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager to register.
Loading mirror speeds from cached hostfile
* base: mirrors.lga7.us.voxel.net
* extras: mirror.cs.pitt.edu
* updates: mirror.cogentco.com
Installed Packages
Name        : pam_mysql
Arch        : x86_64
Epoch       : 1
Version     : 0.8.1
Release     : 0.22.el7.lux
Size        : 96 k
Repo        : installed
From repo   : lux
Summary     : PAM module for auth UNIX users using MySQL data base
URL         : http://sf.net/projects/pam-mysql/
License     : GPLv2+
Description : Pam_mysql aims to provide a backend neutral means of authenticating
           : users against an MySQL database.

我在標誌中添加了“-r -c”。還發現 @ 符號在測試時沒有被正確轉義。一切都按預期工作。

引用自：https://serverfault.com/questions/892556