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persistent-setup: trust Tails passphrase policy #243

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persistent-setup: trust Tails passphrase policy #243

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16 changes: 2 additions & 14 deletions bails/.local/bin/persistent-setup
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Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,7 @@ prompt_passphrase() {
'SETPROMPT Passphrase:' \
'SETREPEAT Confirm passphrase:' \
'SETREPEATERROR Passphrases do not match.' \
'GETPIN' | pinentry-gnome3
'GETPIN' | pinentry-gnome3 --timeout 0
)" || return 1

passphrase="$(sed -n 's/^D //p' <<< "$response")"
Expand All @@ -64,21 +64,9 @@ pgrep -f spaced-repetition || if /usr/local/lib/tpscli is-unlocked; then
if [ -z "$existing_passphrase" ]; then
zenity --error --title="Error" --text="Existing Persistent Storage passphrase is required. Please provide the passphrase." "$ICON"
else
# Estimate passphrase entropy to see if we can proceed
entropy=$(keepassxc-cli estimate "${existing_passphrase// /}" | cut -f2 | tr -C -d '[:digit:]')
if ((entropy >= 65000)); then
break
elif ((entropy > 50000)); then
zenity --question --icon-name=dialog-warning --title='Warning: Weak Passphrase Detected' \
--text="<b>Your passphrase is too weak to protect against a state-sponsored attacker with physical access to your USB stick.</b>\n\nTails recommends choosing a long passphrase made of 5 to 7 random words.\n<a href='https://theintercept.com/2015/03/26/passphrases-can-memorize-attackers-cant-guess/'>Learn about the maths behind memorizable and secure passphrases</a>.\n\nIf a state-sponsored attacker with physical access to your device is part of your <a href='https://ssd.eff.org/module/your-security-plan'>threat model</a>, you MUST restart, delete this Persistent Storage and use a recommended passphrase.\n\nFor more information, please read the Tails security advisory on passphrase security: <a href='https://tails.net/security/argon2id/#understanding'>Understanding weak passphrases</a>\n\nBe sure to save your work before clicking 'Restart Now'." "$ICON" --ok-label='Continue' --default-cancel --cancel-label='Restart Now' && break
else
zenity --warning --title='WARNING: Weak Passphrase Detected' \
--text="<b>Your passphrase is too weak to protect against attackers with physical access to your USB stick.</b>\n\nTails recommends choosing a long passphrase made of 5 to 7 random words.\n<a href='https://theintercept.com/2015/03/26/passphrases-can-memorize-attackers-cant-guess/'>Learn about the maths behind memorizable and secure passphrases</a>.\n\nYou MUST restart, delete this Persistent Storage and use a recommended passphrase.\n\nFor more information, please read the Tails security advisory on passphrase security: <a href='https://tails.net/security/argon2id/#understanding'>Understanding weak passphrases</a>\n\nBe sure to save your work before clicking 'Restart Now'." "$ICON" --ok-label='Restart Now'
fi
systemctl reboot
break
fi
done
unset entropy
[ -f $SET_UP ] || if ((passwd_unset)); then
# Change user account password to Persistent Storage passphrase for spaced repetition practice.
printf '%s\n%s' "$existing_passphrase" "$existing_passphrase" | passwd || echo "FAILURE to change passphrase"
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