diff --git a/testssl.sh b/testssl.sh index 61282a9..9511703 100755 --- a/testssl.sh +++ b/testssl.sh @@ -22933,15 +22933,20 @@ run_rating() { pr_headlineln " Rating (experimental) " outln - [[ -n "$STARTTLS_PROTOCOL" ]] && set_grade_cap "T" "STARTTLS encryption is not mandatory for clients. STARTTLS can only be secured client-side" - # TL;DR: E-mail transfer via port 25 is broken and the amendments suggested so far are duct tape. So please do not expect testssl.sh to shut up. + if [[ -n "$STARTTLS_PROTOCOL" ]]; then + read -r -d '' grade_cap_reason <<'EOF' +TL;DR: E-mail transfer via port 25 is broken and the amendments suggested so far are duct tape. So please do not expect testssl.sh to shut up. - # Explanation: For other than SMTP you should use TLS as per RFC 8314 . For SMTP however there's this thing named reality: A mail server cannot - # just switch to the mail submission port 587 only and continue to receive mail from everyone. Even if you advertise this via SRV record (RFC 6186). - # For STARTTLS there's no way to tell for testssl.sh whether it is secure. A MitM can always intercept the connection, unless the client checks - # the certificate accordingly (it's getting better but some just don't). TLSA Records/DANE and MTA-STS (RFC-8461) on the server side can help too. - # But as said, it's useless unless the client MTA checks all that which no tool can check. +Explanation: For other than SMTP you should use TLS as per RFC 8314. For SMTP however there's this thing named reality: A mail server cannot +just switch to the mail submission port 587 only and continue to receive mail from everyone. Even if you advertise this via SRV record (RFC 6186). +For STARTTLS there's no way to tell for testssl.sh whether it is secure. A MitM can always intercept the connection, unless the client checks +the certificate accordingly (it's getting better but some just don't). TLSA Records/DANE and MTA-STS (RFC-8461) on the server side can help too. +But as said, it's useless unless the client MTA checks all that which no tool can check. +EOF + # We can't use newlines in the message, as the grade-sorting function will mess up the reason + set_grade_cap "T" "$(tr '\n' ' ' <<<$grade_cap_reason)" + fi pr_bold " Rating specs"; out " (not complete) "; outln "SSL Labs's 'SSL Server Rating Guide' (version 2009q from 2020-01-30)" pr_bold " Specification documentation "; pr_url "https://github.com/ssllabs/research/wiki/SSL-Server-Rating-Guide" @@ -23127,9 +23132,9 @@ run_rating() { # Pretty print - again, it's just nicer to read for reason in "${sorted_reasons[@]}"; do if [[ $reason_nr -eq 0 ]]; then - pr_bold " Grade cap reasons "; outln "$reason" + pr_bold " Grade cap reasons "; out_row_aligned_max_width "$reason\n" ' ' $TERM_WIDTH else - outln " $reason" + out_row_aligned_max_width " $reason\n" ' ' $TERM_WIDTH fi ((reason_nr++)) fileout "grade_cap_reason_${reason_nr}" "INFO" "$reason"