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Make certificate descriptions sed safe

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This escapes special characters used in POSIX sed to prevent mismatches.
e.g. `SYNO_Certficiate=*.example.com` would not match a description of
"*.example.com" and would look to match any number of double quotes (the
last character in the sed regex prior to certificate description),
followed by any single character, followed by "example", followed by any
character, followed by "com".

After this change, it will properly match `*.example.com` and not
`""zexamplefcom`.

Additionally we now store the certificate description as base64 encoded
to prevent issues with single quotes.

Tested on DSM 7.0-41222 (VDSM) and DSM 6.2.4-25556 (DS1515+).
This commit is contained in:
Brian Hartvigsen 2021-05-26 15:07:23 -06:00
parent 7909273a21
commit 74a4a788b1
No known key found for this signature in database
GPG Key ID: 46EEA32081255BEB
1 changed files with 10 additions and 3 deletions
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13
deploy/synology_dsm.sh
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@ -66,6 +66,11 @@ synology_dsm_deploy() {
_getdeployconf SYNO_Certificate
_debug SYNO_Certificate "${SYNO_Certificate:-}"
if printf "%s" "$SYNO_Certificate" | grep '\\'; then
_err "Do not use a backslash (\) in your certificate description"
return 1
fi
_base_url="$SYNO_Scheme://$SYNO_Hostname:$SYNO_Port"
_debug _base_url "$_base_url"
@ -110,7 +115,9 @@ synology_dsm_deploy() {
_info "Getting certificates in Synology DSM"
response=$(_post "api=SYNO.Core.Certificate.CRT&method=list&version=1&_sid=$sid" "$_base_url/webapi/entry.cgi")
_debug3 response "$response"
id=$(echo "$response" | sed -n "s/.*\"desc\":\"$SYNO_Certificate\",\"id\":\"\([^\"]*\).*/\1/p")
escaped_certificate="$(printf "%s" "$SYNO_Certificate" | sed 's/\([].*^$[]\)/\\\1/g;s/"/\\\\"/g')"
_debug escaped_certificate "$escaped_certificate"
id=$(echo "$response" | sed -n "s/.*\"desc\":\"$escaped_certificate\",\"id\":\"\([^\"]*\).*/\1/p")
_debug2 id "$id"
if [ -z "$id" ] && [ -z "${SYNO_Create:-}" ]; then
@ -119,7 +126,7 @@ synology_dsm_deploy() {
fi
# we've verified this certificate description is a thing, so save it
_savedeployconf SYNO_Certificate "$SYNO_Certificate"
_savedeployconf SYNO_Certificate "$SYNO_Certificate" "base64"
_info "Generate form POST request"
nl="\0015\0012"
@ -129,7 +136,7 @@ synology_dsm_deploy() {
content="$content${nl}--$delim${nl}Content-Disposition: form-data; name=\"inter_cert\"; filename=\"$(basename "$_cca")\"${nl}Content-Type: application/octet-stream${nl}${nl}$(cat "$_cca")\0012"
content="$content${nl}--$delim${nl}Content-Disposition: form-data; name=\"id\"${nl}${nl}$id"
content="$content${nl}--$delim${nl}Content-Disposition: form-data; name=\"desc\"${nl}${nl}${SYNO_Certificate}"
if echo "$response" | sed -n "s/.*\"desc\":\"$SYNO_Certificate\",\([^{]*\).*/\1/p" | grep -- 'is_default":true' >/dev/null; then
if echo "$response" | sed -n "s/.*\"desc\":\"$escaped_certificate\",\([^{]*\).*/\1/p" | grep -- 'is_default":true' >/dev/null; then
_debug2 default "this is the default certificate"
content="$content${nl}--$delim${nl}Content-Disposition: form-data; name=\"as_default\"${nl}${nl}true"
else