From 9097dc5ad844c336020be11085e1c8c80390ac9c Mon Sep 17 00:00:00 2001 From: Hannu Nyman Date: Thu, 6 Oct 2016 20:37:59 +0300 Subject: [PATCH] uhttpd: create self-signed certificates with unique subjects Add a partially random O= item to the certificate subject in order to make the automatically generated certificates' subjects unique. Firefox has problems when several self-signed certificates with CA:true attribute and identical subjects have been seen (and stored) by the browser. Reference to upstream bugs: https://bugzilla.mozilla.org/show_bug.cgi?id=1147544 https://bugzilla.mozilla.org/show_bug.cgi?id=1056341 https://bugzilla.redhat.com/show_bug.cgi?id=1204670#c34 Certificates created by the OpenSSL one-liner fall into that category. Avoid identical certificate subjects by including a new 'O=' item with CommonName + a random part (8 chars). Example: /CN=LEDE/O=LEDEb986be0b/L=Unknown/ST=Somewhere/C=ZZ That ensures that the browser properly sees the accumulating certificates as separate items and does not spend time trying to form a trust chain from them. Signed-off-by: Hannu Nyman --- package/network/services/uhttpd/files/uhttpd.init | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/package/network/services/uhttpd/files/uhttpd.init b/package/network/services/uhttpd/files/uhttpd.init index 35c1985cd2..a2dbcd2f93 100755 --- a/package/network/services/uhttpd/files/uhttpd.init +++ b/package/network/services/uhttpd/files/uhttpd.init @@ -46,12 +46,13 @@ generate_keys() { # Prefer px5g for certificate generation (existence evaluated last) local GENKEY_CMD="" + local UNIQUEID=$(dd if=/dev/urandom bs=1 count=4 | hexdump -e '1/1 "%02x"') [ -x "$OPENSSL_BIN" ] && GENKEY_CMD="$OPENSSL_BIN req -x509 -outform der -nodes" [ -x "$PX5G_BIN" ] && GENKEY_CMD="$PX5G_BIN selfsigned -der" [ -n "$GENKEY_CMD" ] && { $GENKEY_CMD \ -days ${days:-730} -newkey rsa:${bits:-2048} -keyout "${UHTTPD_KEY}.new" -out "${UHTTPD_CERT}.new" \ - -subj /C="${country:-DE}"/ST="${state:-Saxony}"/L="${location:-Leipzig}"/CN="${commonname:-Lede}" + -subj /C="${country:-DE}"/ST="${state:-Saxony}"/L="${location:-Leipzig}"/O="${commonname:-Lede}$UNIQUEID"/CN="${commonname:-Lede}" sync mv "${UHTTPD_KEY}.new" "${UHTTPD_KEY}" mv "${UHTTPD_CERT}.new" "${UHTTPD_CERT}"