plantroon/acme.sh
1
0
Fork 0
mirror of https://github.com/plantroon/acme.sh.git synced 2024-12-22 13:11:41 +00:00
Code Issues Projects Releases Wiki Activity

Clean email headers and warn on unsupported address format

Browse Source 
Just in case, make sure CR or NL don't end up in
an email header.
This commit is contained in:
medmunds 2021-02-16 14:02:09 -08:00 committed by Alexander Kulumbeg
parent d3c74cfb45
commit 1330a092fa
1 changed files with 30 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

55
notify/smtp.sh
View File

@ -53,16 +53,28 @@ smtp_send() {
_saveaccountconf_mutable_default SMTP_BIN "$SMTP_BIN"
SMTP_FROM="$(_readaccountconf_mutable_default SMTP_FROM)"
SMTP_FROM="$(_clean_email_header "$SMTP_FROM")"
if [ -z "$SMTP_FROM" ]; then
_err "You must define SMTP_FROM as the sender email address."
return 1
fi
if _email_has_display_name "$SMTP_FROM"; then
_err "SMTP_FROM must be only a simple email address (sender@example.com)."
_err "Change your SMTP_FROM='$SMTP_FROM' to remove the display name."
return 1
fi
_debug SMTP_FROM "$SMTP_FROM"
_saveaccountconf_mutable_default SMTP_FROM "$SMTP_FROM"
SMTP_TO="$(_readaccountconf_mutable_default SMTP_TO)"
SMTP_TO="$(_clean_email_header "$SMTP_TO")"
if [ -z "$SMTP_TO" ]; then
_err "You must define SMTP_TO as the recipient email address."
_err "You must define SMTP_TO as the recipient email address(es)."
return 1
fi
if _email_has_display_name "$SMTP_TO"; then
_err "SMTP_TO must be only simple email addresses (to@example.com,to2@example.com)."
_err "Change your SMTP_TO='$SMTP_TO' to remove the display name(s)."
return 1
fi
_debug SMTP_TO "$SMTP_TO"
@ -111,7 +123,7 @@ smtp_send() {
_debug SMTP_TIMEOUT "$SMTP_TIMEOUT"
_saveaccountconf_mutable_default SMTP_TIMEOUT "$SMTP_TIMEOUT" "$SMTP_TIMEOUT_DEFAULT"
SMTP_X_MAILER="${PROJECT_NAME} ${VER} --notify-hook smtp"
SMTP_X_MAILER="$(_clean_email_header "$PROJECT_NAME $VER --notify-hook smtp")"
# Run with --debug 2 (or above) to echo the transcript of the SMTP session.
# Careful: this may include SMTP_PASSWORD in plaintext!
@ -121,6 +133,7 @@ smtp_send() {
SMTP_SHOW_TRANSCRIPT=""
fi
SMTP_SUBJECT=$(_clean_email_header "$SMTP_SUBJECT")
_debug SMTP_SUBJECT "$SMTP_SUBJECT"
_debug SMTP_CONTENT "$SMTP_CONTENT"
@ -146,28 +159,26 @@ smtp_send() {
return 0
}
# Strip CR and NL from text to prevent MIME header injection
# text
_clean_email_header() {
printf "%s" "$(echo "$1" | tr -d "\r\n")"
}
# Simple check for display name in an email address (< > or ")
# email
_email_has_display_name() {
_email="$1"
expr "$_email" : '^.*[<>"]' >/dev/null
}
##
## curl smtp sending
##
# Send the message via curl using SMTP_* variables
_smtp_send_curl() {
# curl passes --mail-from and --mail-rcpt directly to the SMTP protocol without
# additional parsing, and SMTP requires addr-spec only (no display names).
# In the future, maybe try to parse the addr-spec out for curl args (non-trivial).
if _email_has_display_name "$SMTP_FROM"; then
_err "curl smtp only allows a simple email address in SMTP_FROM."
_err "Change your SMTP_FROM='$SMTP_FROM' to remove the display name."
return 1
fi
if _email_has_display_name "$SMTP_TO"; then
_err "curl smtp only allows simple email addresses in SMTP_TO."
_err "Change your SMTP_TO='$SMTP_TO' to remove the display name(s)."
return 1
fi
# Build curl args in $@
case "$SMTP_SECURE" in
none)
set -- --url "smtp://${SMTP_HOST}:${SMTP_PORT}"
@ -219,7 +230,8 @@ _smtp_send_curl() {
echo "$raw_message" | "$SMTP_BIN" "$@"
}
# Output an RFC-822 / RFC-5322 email message using SMTP_* variables
# Output an RFC-822 / RFC-5322 email message using SMTP_* variables.
# (This assumes variables have already been cleaned for use in email headers.)
_smtp_raw_message() {
echo "From: $SMTP_FROM"
echo "To: $SMTP_TO"
@ -259,13 +271,6 @@ _rfc2822_date() {
LC_TIME="$_old_lc_time"
}
# Simple check for display name in an email address (< > or ")
# email
_email_has_display_name() {
_email="$1"
expr "$_email" : '^.*[<>"]' >/dev/null
}
##
## Python smtp sending
##