Simplify banner text syntax and add utility to generate banner regular expression

docs/manual/developer_guide.adoc

@@ -752,6 +752,14 @@ $ ./build-scripts/profile_tool.py sub --profile1 rhel7/profiles/ospp.profile --p
 
 This will result in a new YAML profile containing exclusive rules to the profile pointed by the --profile1 option.
 
+=== Generating login banner regular expressions
+
+Rules like `banner_etc_issue` and `dconf_gnome_login_banner_text` will check for configuration of login banners and remediate them. Both rules source the banner text from the same variable `login_banner_text`, and the banner texts need to be in the form of a regular expression.
+There are a few utilities you can use to transform your text into the appropriate regular expression:
+
+When adding a new banner directly to the `login_banner_text`, use the custom Jinja filter `banner_regexify`. +
+If customizing content via SCAP Workbench, or directly writing your tailoring XML, use `utils/regexify_banner.py` to generate the appropriate regular expression.
+
 == Contributing with XCCDFs, OVALs and remediations
 
 There are three main types of content in the project, they are rules, defined using the XCCDF standard, checks, usually written in link:https://oval.mitre.org/language/about/[OVAL] format, and remediations, that can be executed on ansible, bash, anaconda installer, puppet and ignition.
@@ -1279,6 +1287,8 @@ Jinja macros for Ansible content are located in `/shared/macros-ansible.jinja`.
 - `ansible_sshd_set` -- set a parameter in the sshd configuration
 - `ansible_etc_profile_set` -- ensure a command gets executed or a variable gets set in /etc/profile or /etc/profile.d
 - `ansible_tmux_set` -- set a command in tmux configuration
+- `ansible_deregexify_banner_etc_issue` -- Formats a banner regex for use in /etc/issue
+- `ansible_deregexify_banner_dconf_gnome` -- Formats a banner regex for use in dconf
 
 They also include several low-level macros:
 
@@ -1289,6 +1299,14 @@ They also include several low-level macros:
 - `ansible_set_config_file` -- for configuration files; set the given configuration value and ensure no conflicting values
 - `ansible_set_config_file_dir` -- for configuration files and files in configuration directories; set the given configuration value and ensure no conflicting values
 
+Low level macros to make login banner regular expressions usable in Ansible remediations
+
+- `ansible_deregexify_multiple_banners` -- Strips multibanner regex and keeps only the first banner
+- `ansible_deregexify_banner_space` -- Strips whitespace or newline regex
+- `ansible_deregexify_banner_newline` -- Strips newline or newline escape sequence regex
+- `ansible_deregexify_banner_newline_token` -- Strips newline token for a newline escape sequence regex
+- `ansible_deregexify_banner_backslash` - Strips backslash regex
+
 When `msg` is absent from any of the above macros, rule title will be substituted instead.
 
 Whenever possible, please reuse the macros and form high-level simplifications.
@@ -1348,6 +1366,14 @@ Available low-level Jinja macros that can be used in Bash remediations:
 - `die` - Function to terminate the remediation
 - `set_config_file` - Add an entry to a text configuration file
 
+Low level macros to make login banner regular expressions usable in Bash remediations
+
+- `bash_deregexify_multiple_banners` - Strips multibanner regex and keeps only the first banner
+- `bash_deregexify_banner_space` - Strips whitespace or newline regex
+- `bash_deregexify_banner_newline` - Strips newline or newline escape sequence regex
+- `bash_deregexify_banner_newline_token` - Strips newline token for a newline escape sequence regex
+- `bash_deregexify_banner_backslash` - Strips backslash regex
+
 === Templating
 
 Writing OVAL checks, Bash, or any other content can be tedious work. For

linux_os/guide/services/http/securing_httpd/httpd_secure_content/var_web_login_banner_text.var

@@ -4,20 +4,20 @@ title: 'Web Login Banner Verbiage'
 
 description: |-
     Enter an appropriate login banner for your organization. Please note that new lines must
-    be expressed by the '\n' character and special characters like parentheses and quotation marks must be escaped with '\'.
+    be expressed by the '\n' character and special characters like parentheses and quotation marks must be escaped with '\\'.
 
 type: string
 
 operator: equals
 
 interactive: false
 
+{{% set var_dod_default = "You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. By using this IS (which includes any device attached to this IS), you consent to the following conditions:\n-The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations.\n-At any time, the USG may inspect and seize data stored on this IS.\n-Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG-authorized purpose.\n-This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy.\n-Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details." %}}
+{{% set var_dod_short = "I've read & consent to terms in IS user agreem't." %}}
+
 options:
-    dod_banners: ^(You[\s\n]+are[\s\n]+accessing[\s\n]+a[\s\n]+U.S.[\s\n]+Government[\s\n]+\(USG\)[\s\n]+Information[\s\n]+System[\s\n]+\(IS\)[\s\n]+that[\s\n]+is[\s\n]+provided[\s\n]+for[\s\n]+USG-authorized[\s\n]+use[\s\n]+only.[\s\n]*By[\s\n]+using[\s\n]+this[\s\n]+IS[\s\n]+\(which[\s\n]+includes[\s\n]+any[\s\n]+device[\s\n]+attached[\s\n]+to[\s\n]+this[\s\n]+IS\),[\s\n]+you[\s\n]+consent[\s\n]+to[\s\n]+the[\s\n]+following[\s\n]+conditions\:[\s\n]*-[\s\n]*The[\s\n]+USG[\s\n]+routinely[\s\n]+intercepts[\s\n]+and[\s\n]+monitors[\s\n]+communications[\s\n]+on[\s\n]+this[\s\n]+IS[\s\n]+for[\s\n]+purposes[\s\n]+including,[\s\n]+but[\s\n]+not[\s\n]+limited[\s\n]+to,[\s\n]+penetration[\s\n]+testing,[\s\n]+COMSEC[\s\n]+monitoring,[\s\n]+network[\s\n]+operations[\s\n]+and[\s\n]+defense,[\s\n]+personnel[\s\n]+misconduct[\s\n]+\(PM\),[\s\n]+law[\s\n]+enforcement[\s\n]+\(LE\),[\s\n]+and[\s\n]+counterintelligence[\s\n]+\(CI\)[\s\n]+investigations.[\s\n]*-[\s\n]*At[\s\n]+any[\s\n]+time,[\s\n]+the[\s\n]+USG[\s\n]+may[\s\n]+inspect[\s\n]+and[\s\n]+seize[\s\n]+data[\s\n]+stored[\s\n]+on[\s\n]+this[\s\n]+IS.[\s\n]*-[\s\n]*Communications[\s\n]+using,[\s\n]+or[\s\n]+data[\s\n]+stored[\s\n]+on,[\s\n]+this[\s\n]+IS[\s\n]+are[\s\n]+not[\s\n]+private,[\s\n]+are[\s\n]+subject[\s\n]+to[\s\n]+routine[\s\n]+monitoring,[\s\n]+interception,[\s\n]+and[\s\n]+search,[\s\n]+and[\s\n]+may[\s\n]+be[\s\n]+disclosed[\s\n]+or[\s\n]+used[\s\n]+for[\s\n]+any[\s\n]+USG-authorized[\s\n]+purpose.[\s\n]*-[\s\n]*This[\s\n]+IS[\s\n]+includes[\s\n]+security[\s\n]+measures[\s\n]+\(e.g.,[\s\n]+authentication[\s\n]+and[\s\n]+access[\s\n]+controls\)[\s\n]+to[\s\n]+protect[\s\n]+USG[\s\n]+interests--not[\s\n]+for[\s\n]+your[\s\n]+personal[\s\n]+benefit[\s\n]+or[\s\n]+privacy.[\s\n]*-[\s\n]*Notwithstanding[\s\n]+the[\s\n]+above,[\s\n]+using[\s\n]+this[\s\n]+IS[\s\n]+does[\s\n]+not[\s\n]+constitute[\s\n]+consent[\s\n]+to[\s\n]+PM,[\s\n]+LE[\s\n]+or[\s\n]+CI[\s\n]+investigative[\s\n]+searching[\s\n]+or[\s\n]+monitoring[\s\n]+of[\s\n]+the[\s\n]+content[\s\n]+of[\s\n]+privileged[\s\n]+communications,[\s\n]+or[\s\n]+work[\s\n]+product,[\s\n]+related[\s\n]+to[\s\n]+personal[\s\n]+representation[\s\n]+or[\s\n]+services[\s\n]+by[\s\n]+attorneys,[\s\n]+psychotherapists,[\s\n]+or[\s\n]+clergy,[\s\n]+and[\s\n]+their[\s\n]+assistants.[\s\n]+Such[\s\n]+communications[\s\n]+and[\s\n]+work[\s\n]+product[\s\n]+are[\s\n]+private[\s\n]+and[\s\n]+confidential.[\s\n]+See[\s\n]+User[\s\n]+Agreement[\s\n]+for[\s\n]+details.|I\'ve[\s\n]+read[\s\n]+\&[\s\n]+consent[\s\n]+to[\s\n]+terms[\s\n]+in[\s\n]+IS[\s\n]+user[\s\n]+agreem\'t.)$
-    dod_default: You[\s\n]+are[\s\n]+accessing[\s\n]+a[\s\n]+U.S.[\s\n]+Government[\s\n]+\(USG\)[\s\n]+Information[\s\n]+System[\s\n]+\(IS\)[\s\n]+that[\s\n]+is[\s\n]+provided[\s\n]+for[\s\n]+USG-authorized[\s\n]+use[\s\n]+only.[\s\n]*By[\s\n]+using[\s\n]+this[\s\n]+IS[\s\n]+\(which[\s\n]+includes[\s\n]+any[\s\n]+device[\s\n]+attached[\s\n]+to[\s\n]+this[\s\n]+IS\),[\s\n]+you[\s\n]+consent[\s\n]+to[\s\n]+the[\s\n]+following[\s\n]+conditions\:[\s\n]*-[\s\n]*The[\s\n]+USG[\s\n]+routinely[\s\n]+intercepts[\s\n]+and[\s\n]+monitors[\s\n]+communications[\s\n]+on[\s\n]+this[\s\n]+IS[\s\n]+for[\s\n]+purposes[\s\n]+including,[\s\n]+but[\s\n]+not[\s\n]+limited[\s\n]+to,[\s\n]+penetration[\s\n]+testing,[\s\n]+COMSEC[\s\n]+monitoring,[\s\n]+network[\s\n]+operations[\s\n]+and[\s\n]+defense,[\s\n]+personnel[\s\n]+misconduct[\s\n]+\(PM\),[\s\n]+law[\s\n]+enforcement[\s\n]+\(LE\),[\s\n]+and[\s\n]+counterintelligence[\s\n]+\(CI\)[\s\n]+investigations.[\s\n]*-[\s\n]*At[\s\n]+any[\s\n]+time,[\s\n]+the[\s\n]+USG[\s\n]+may[\s\n]+inspect[\s\n]+and[\s\n]+seize[\s\n]+data[\s\n]+stored[\s\n]+on[\s\n]+this[\s\n]+IS.[\s\n]*-[\s\n]*Communications[\s\n]+using,[\s\n]+or[\s\n]+data[\s\n]+stored[\s\n]+on,[\s\n]+this[\s\n]+IS[\s\n]+are[\s\n]+not[\s\n]+private,[\s\n]+are[\s\n]+subject[\s\n]+to[\s\n]+routine[\s\n]+monitoring,[\s\n]+interception,[\s\n]+and[\s\n]+search,[\s\n]+and[\s\n]+may[\s\n]+be[\s\n]+disclosed[\s\n]+or[\s\n]+used[\s\n]+for[\s\n]+any[\s\n]+USG-authorized[\s\n]+purpose.[\s\n]*-[\s\n]*This[\s\n]+IS[\s\n]+includes[\s\n]+security[\s\n]+measures[\s\n]+\(e.g.,[\s\n]+authentication[\s\n]+and[\s\n]+access[\s\n]+controls\)[\s\n]+to[\s\n]+protect[\s\n]+USG[\s\n]+interests--not[\s\n]+for[\s\n]+your[\s\n]+personal[\s\n]+benefit[\s\n]+or[\s\n]+privacy.[\s\n]*-[\s\n]*Notwithstanding[\s\n]+the[\s\n]+above,[\s\n]+using[\s\n]+this[\s\n]+IS[\s\n]+does[\s\n]+not[\s\n]+constitute[\s\n]+consent[\s\n]+to[\s\n]+PM,[\s\n]+LE[\s\n]+or[\s\n]+CI[\s\n]+investigative[\s\n]+searching[\s\n]+or[\s\n]+monitoring[\s\n]+of[\s\n]+the[\s\n]+content[\s\n]+of[\s\n]+privileged[\s\n]+communications,[\s\n]+or[\s\n]+work[\s\n]+product,[\s\n]+related[\s\n]+to[\s\n]+personal[\s\n]+representation[\s\n]+or[\s\n]+services[\s\n]+by[\s\n]+attorneys,[\s\n]+psychotherapists,[\s\n]+or[\s\n]+clergy,[\s\n]+and[\s\n]+their[\s\n]+assistants.[\s\n]+Such[\s\n]+communications[\s\n]+and[\s\n]+work[\s\n]+product[\s\n]+are[\s\n]+private[\s\n]+and[\s\n]+confidential.[\s\n]+See[\s\n]+User[\s\n]+Agreement[\s\n]+for[\s\n]+details.
-    dod_short: I\'ve[\s\n]+read[\s\n]+\&[\s\n]+consent[\s\n]+to[\s\n]+terms[\s\n]+in[\s\n]+IS[\s\n]+user[\s\n]+agreem\'t.
-    dss_odaa_default: "[\\s\\n]+Use[\\s\\n]+of[\\s\\n]+this[\\s\\n]+or[\\s\\n]+any[\\s\\n]+other[\\s\\n]+DoD[\\s\\n]+interest[\\s\\n]+computer[\\s\\n]+system[\\s\\n]+constitutes[\\s\\n]+consent[\\s\\n]+to[\\s\\n]+monitoring[\\s\\n]+at[\\s\\n]+all[\\s\\n]+times.[\\s\\n]+This[\\s\\n]+is[\\s\\n]+a[\\s\\n]+DoD[\\s\\n]+interest[\\s\\n]+computer[\\s\\n]+system.[\\s\\n]+All[\\s\\n]+DoD[\\s\\n]+interest[\\s\\n]+computer[\\s\\n]+systems[\\s\\n]+and[\\s\\n]+related[\\s\\n]+equipment[\\s\\n]+are[\\s\\n]+intended[\\s\\n]+for[\\s\\n]+the[\\s\\n]+communication,[\\s\\n]+transmission,[\\s\\n]+processing,[\\s\\n]+and[\\s\\n]+storage[\\s\\n]+of[\\s\\n]+official[\\s\\n]+U.S.[\\s\\n]+Government[\\s\\n]+or[\\s\\n]+other[\\s\\n]+authorized[\\s\\n]+information[\\s\\n]+only.[\\s\\n]+All[\\s\\n]+DoD[\\s\\n]+interest[\\s\\n]+computer[\\s\\n]+systems[\\s\\n]+are[\\s\\n]+subject[\\s\\n]+to[\\s\\n]+monitoring[\\s\\n]+at[\\s\\n]+all[\\s\\n]+times[\\s\\n]+to[\\s\\n]+ensure[\\s\\n]+proper[\\s\\n]+functioning[\\s\\n]+of[\\\
-        s\\n]+equipment[\\s\\n]+and[\\s\\n]+systems[\\s\\n]+including[\\s\\n]+security[\\s\\n]+devices[\\s\\n]+and[\\s\\n]+systems,[\\s\\n]+to[\\s\\n]+prevent[\\s\\n]+unauthorized[\\s\\n]+use[\\s\\n]+and[\\s\\n]+violations[\\s\\n]+of[\\s\\n]+statutes[\\s\\n]+and[\\s\\n]+security[\\s\\n]+regulations,[\\s\\n]+to[\\s\\n]+deter[\\s\\n]+criminal[\\s\\n]+activity,[\\s\\n]+and[\\s\\n]+for[\\s\\n]+other[\\s\\n]+similar[\\s\\n]+purposes.[\\s\\n]+Any[\\s\\n]+user[\\s\\n]+of[\\s\\n]+a[\\s\\n]+DoD[\\s\\n]+interest[\\s\\n]+computer[\\s\\n]+system[\\s\\n]+should[\\s\\n]+be[\\s\\n]+aware[\\s\\n]+that[\\s\\n]+any[\\s\\n]+information[\\s\\n]+placed[\\s\\n]+in[\\s\\n]+the[\\s\\n]+system[\\s\\n]+is[\\s\\n]+subject[\\s\\n]+to[\\s\\n]+monitoring[\\s\\n]+and[\\s\\n]+is[\\s\\n]+not[\\s\\n]+subject[\\s\\n]+to[\\s\\n]+any[\\s\\n]+expectation[\\s\\n]+of[\\s\\n]+privacy.[\\s\\n]+If[\\s\\n]+monitoring[\\s\\n]+of[\\s\\n]+this[\\s\\n]+or[\\s\\n]+any[\\s\\n]+other[\\s\\n]+DoD[\\s\\n]+interest[\\s\\n]+computer[\\s\\n]+system[\\\
-        s\\n]+reveals[\\s\\n]+possible[\\s\\n]+evidence[\\s\\n]+of[\\s\\n]+violation[\\s\\n]+of[\\s\\n]+criminal[\\s\\n]+statutes,[\\s\\n]+this[\\s\\n]+evidence[\\s\\n]+and[\\s\\n]+any[\\s\\n]+other[\\s\\n]+related[\\s\\n]+information,[\\s\\n]+including[\\s\\n]+identification[\\s\\n]+information[\\s\\n]+about[\\s\\n]+the[\\s\\n]+user,[\\s\\n]+may[\\s\\n]+be[\\s\\n]+provided[\\s\\n]+to[\\s\\n]+law[\\s\\n]+enforcement[\\s\\n]+officials.[\\s\\n]+If[\\s\\n]+monitoring[\\s\\n]+of[\\s\\n]+this[\\s\\n]+or[\\s\\n]+any[\\s\\n]+other[\\s\\n]+DoD[\\s\\n]+interest[\\s\\n]+computer[\\s\\n]+systems[\\s\\n]+reveals[\\s\\n]+violations[\\s\\n]+of[\\s\\n]+security[\\s\\n]+regulations[\\s\\n]+or[\\s\\n]+unauthorized[\\s\\n]+use,[\\s\\n]+employees[\\s\\n]+who[\\s\\n]+violate[\\s\\n]+security[\\s\\n]+regulations[\\s\\n]+or[\\s\\n]+make[\\s\\n]+unauthorized[\\s\\n]+use[\\s\\n]+of[\\s\\n]+DoD[\\s\\n]+interest[\\s\\n]+computer[\\s\\n]+systems[\\s\\n]+are[\\s\\n]+subject[\\s\\n]+to[\\s\\n]+appropriate[\\s\\n]+disciplinary[\\\
-        s\\n]+action.[\\s\\n]+Use[\\s\\n]+of[\\s\\n]+this[\\s\\n]+or[\\s\\n]+any[\\s\\n]+other[\\s\\n]+DoD[\\s\\n]+interest[\\s\\n]+computer[\\s\\n]+system[\\s\\n]+constitutes[\\s\\n]+consent[\\s\\n]+to[\\s\\n]+monitoring[\\s\\n]+at[\\s\\n]+all[\\s\\n]+times."
-    usgcb_default: --[\s\n]+WARNING[\s\n]+--[\s\n]*This[\s\n]+system[\s\n]+is[\s\n]+for[\s\n]+the[\s\n]+use[\s\n]+of[\s\n]+authorized[\s\n]+users[\s\n]+only.[\s\n]+Individuals[\s\n]*using[\s\n]+this[\s\n]+computer[\s\n]+system[\s\n]+without[\s\n]+authority[\s\n]+or[\s\n]+in[\s\n]+excess[\s\n]+of[\s\n]+their[\s\n]*authority[\s\n]+are[\s\n]+subject[\s\n]+to[\s\n]+having[\s\n]+all[\s\n]+their[\s\n]+activities[\s\n]+on[\s\n]+this[\s\n]+system[\s\n]*monitored[\s\n]+and[\s\n]+recorded[\s\n]+by[\s\n]+system[\s\n]+personnel.[\s\n]+Anyone[\s\n]+using[\s\n]+this[\s\n]*system[\s\n]+expressly[\s\n]+consents[\s\n]+to[\s\n]+such[\s\n]+monitoring[\s\n]+and[\s\n]+is[\s\n]+advised[\s\n]+that[\s\n]*if[\s\n]+such[\s\n]+monitoring[\s\n]+reveals[\s\n]+possible[\s\n]+evidence[\s\n]+of[\s\n]+criminal[\s\n]+activity[\s\n]*system[\s\n]+personal[\s\n]+may[\s\n]+provide[\s\n]+the[\s\n]+evidence[\s\n]+of[\s\n]+such[\s\n]+monitoring[\s\n]+to[\s\n]+law[\s\n]*enforcement[\s\n]+officials.
+    dod_banners: {{{ "^(" ~ var_dod_default|banner_regexify ~ "|" ~ var_dod_short|banner_regexify ~ ")$" }}}
+    dod_default: {{{ var_dod_default|banner_regexify|banner_anchor_wrap }}}
+    dod_short: {{{ var_dod_short|banner_regexify|banner_anchor_wrap }}}
+    dss_odaa_default: {{{ "Use of this or any other DoD interest computer system constitutes consent to monitoring at all times. This is a DoD interest computer system. All DoD interest computer systems and related equipment are intended for the communication, transmission, processing, and storage of official U.S. Government or other authorized information only. All DoD interest computer systems are subject to monitoring at all times to ensure proper functioning of equipment and systems including security devices and systems, to prevent unauthorized use and violations of statutes and security regulations, to deter criminal activity, and for other similar purposes. Any user of a DoD interest computer system should be aware that any information placed in the system is subject to monitoring and is not subject to any expectation of privacy. If monitoring of this or any other DoD interest computer system reveals possible evidence of violation of criminal statutes, this evidence and any other related information, including identification information about the user, may be provided to law enforcement officials. If monitoring of this or any other DoD interest computer systems reveals violations of security regulations or unauthorized use, employees who violate security regulations or make unauthorized use of DoD interest computer systems are subject to appropriate disciplinary action. Use of this or any other DoD interest computer system constitutes consent to monitoring at all times."|banner_regexify|banner_anchor_wrap }}}
+    usgcb_default: {{{ "-- WARNING -- This system is for the use of authorized users only. Individuals using this computer system without authority or in excess of their authority are subject to having all their activities on this system monitored and recorded by system personnel. Anyone using this system expressly consents to such monitoring and is advised that if such monitoring reveals possible evidence of criminal activity system personal may provide the evidence of such monitoring to law enforcement officials."|banner_regexify|banner_anchor_wrap }}}

linux_os/guide/system/accounts/accounts-banners/banner_etc_issue/ansible/shared.yml

@@ -0,0 +1,17 @@
+# platform = multi_platform_rhel,multi_platform_fedora,multi_platform_ol
+# reboot = false
+# strategy = unknown
+# complexity = low
+# disruption = medium
+- (xccdf-var login_banner_text)
+
+- name: "{{{ rule_title }}} - remove incorrect banner"
+  file:
+    state: absent
+    path: /etc/issue
+
+- name: "{{{ rule_title }}} - add correct banner"
+  lineinfile:
+    dest: /etc/issue
+    line: '{{{ ansible_deregexify_banner_etc_issue("login_banner_text") }}}'
+    create: yes

linux_os/guide/system/accounts/accounts-banners/banner_etc_issue/bash/shared.sh

@@ -2,12 +2,20 @@
 . /usr/share/scap-security-guide/remediation_functions
 populate login_banner_text
 
-# There was a regular-expression matching various banners, needs to be expanded
-expanded=$(echo "$login_banner_text" | sed 's/(\\\\\x27)\*/\\\x27/g;s/(\\\x27)\*//g;s/(\^\(.*\)\$|.*$/\1/g;s/\[\\s\\n\][+*]/ /g;s/\\//g;s/[^-]- /\n\n-/g;s/(n)\**//g')
-formatted=$(echo "$expanded" | fold -sw 80)
+# Multiple regexes transform the banner regex into a usable banner
+# 0 - Remove anchors around the banner text
+{{{ bash_deregexify_banner_anchors("login_banner_text") }}}
+# 1 - Keep only the first banners if there are multiple
+#    (dod_banners contains the long and short banner)
+{{{ bash_deregexify_multiple_banners("login_banner_text") }}}
+# 2 - Add spaces ' '. (Transforms regex for "space or newline" into a " ")
+{{{ bash_deregexify_banner_space("login_banner_text") }}}
+# 3 - Adds newlines. (Transforms "(?:\[\\n\]+|(?:\\n)+)" into "\n")
+{{{ bash_deregexify_banner_newline("login_banner_text", "\\n") }}}
+# 4 - Remove any leftover backslash. (From any parethesis in the banner, for example).
+{{{ bash_deregexify_banner_backslash("login_banner_text") }}}
+formatted=$(echo "$login_banner_text" | fold -sw 80)
 
 cat <<EOF >/etc/issue
 $formatted
 EOF
-
-printf "\n" >> /etc/issue

linux_os/guide/system/accounts/accounts-banners/banner_etc_issue/oval/shared.xml

@@ -12,14 +12,20 @@
 
   <ind:textfilecontent54_test check="all" check_existence="all_exist" comment="correct banner in /etc/issue" id="test_banner_etc_issue" version="1">
     <ind:object object_ref="object_banner_etc_issue" />
+    <ind:state state_ref="state_banner_etc_issue" />
   </ind:textfilecontent54_test>
 
   <ind:textfilecontent54_object id="object_banner_etc_issue" version="1">
+    <ind:behaviors singleline="true" multiline="false" />
     <ind:filepath>/etc/issue</ind:filepath>
-    <ind:pattern var_ref="login_banner_text" operation="pattern match" />
+    <ind:pattern operation="pattern match">^(.*)$</ind:pattern>
     <ind:instance datatype="int" operation="greater than or equal">1</ind:instance>
   </ind:textfilecontent54_object>
 
+  <ind:textfilecontent54_state id="state_banner_etc_issue" version="1">
+    <ind:subexpression datatype="string" var_ref="login_banner_text" operation="pattern match" />
+  </ind:textfilecontent54_state>
+
   <external_variable comment="warning banner text variable" datatype="string" id="login_banner_text" version="1" />
 
 </def-group>