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29 lines
1.4 KiB
Bash
Executable file
29 lines
1.4 KiB
Bash
Executable file
#!/bin/bash
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check_user_pwd () {
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# $meth (hashing method) is typically '6' which implies 5000 rounds
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# of SHA-512 per /etc/login.defs -> /etc/pam.d/common-password
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meth=$(sudo grep "^$1:" /etc/shadow | cut -d: -f2 | cut -d$ -f2)
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salt=$(sudo grep "^$1:" /etc/shadow | cut -d: -f2 | cut -d$ -f3)
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hash=$(sudo grep "^$1:" /etc/shadow | cut -d: -f2 | cut -d$ -f4)
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[ $(python3 -c "import crypt; print(crypt.crypt('$2', '\$$meth\$$salt'))") == "\$$meth\$$salt\$$hash" ]
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}
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# credit to the folks at raspberry pi foundatioon
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check_hash () {
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if ! id -u iiab-admin > /dev/null 2>&1 ; then return 0 ; fi
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if grep -q "^PasswordAuthentication\s*no" /etc/ssh/sshd_config ; then return 0 ; fi
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#SHADOW="$(sudo -n grep -E '^iiab-admin:' /etc/shadow 2>/dev/null)"
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#test -n "${SHADOW}" || return 0
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#if echo $SHADOW | grep -q "iiab-admin:!" ; then return 0 ; fi
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#SHADOW_PW=$(echo $SHADOW | cut -d: -f2)
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#if [ "$SHADOW_PW" != '{{ iiab_admin_pwd_hash }}' ]; then return 0 ; fi
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if check_user_pwd "iiab-admin" "{{ iiab_admin_published_pwd }}"; then
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echo -e "\nSSH is enabled and the published password for user 'iiab-admin' is in use."
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echo -e "THIS IS A SECURITY RISK - please log in as user 'iiab-admin' and run 'passwd'"
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echo -e "to change its password.\n"
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fi
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}
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systemctl is-active {{ sshd_service }} > /dev/null && check_hash
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unset check_hash
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