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63 lines
1.3 KiB
63 lines
1.3 KiB
#!/bin/bash
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function usage {
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echo 'usage: <SERVER> [USERNAME PASSWORD]'
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exit 1
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}
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function connect_server {
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openssl s_client -starttls smtp -connect "$server:587" -ign_eof 2>/dev/null <<EOF
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quit
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EOF
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}
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function auth_server {
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base64=$(echo -ne "\0$username\0$password" | base64)
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openssl s_client -starttls smtp -connect "$server:587" -ign_eof 2>/dev/null <<EOF
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ehlo .
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auth plain $base64
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quit
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EOF
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}
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function check_smtp_connection {
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echo -n "check smtp server <$server> port 587 ... "
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if connect_server | grep -q CONNECTED; then
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echo SUCCESSFUL CONNECTION
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else
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echo wrong server connection! && exit 1
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fi
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}
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function check_smtp_auth {
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echo -n "check smtp authentication <$server> port 587 username=<$username> ... "
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set +e
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output=$(auth_server)
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if echo "$output" | grep -q CONNECTED; then
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if echo "$output" | grep -q "Authentication successful"; then
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echo SUCCESSFUL AUTHENTICATION
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else
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echo wrong username or password! && exit 2
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fi
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else
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echo wrong server connection! && exit 1
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fi
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set -e
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}
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### MAIN
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set -Eeuo pipefail
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server=${1:-}
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username=${2:-}
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password=${3:-}
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[[ -z "$server" ]] && usage
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if [[ -z "$username" ]]; then
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check_smtp_connection
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else
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[[ -z "$password" ]] && usage
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check_smtp_auth
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fi
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