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57 lines
2.2 KiB
57 lines
2.2 KiB
/*
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* Copyright (C) 2019 bn4t
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package main
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import (
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"fmt"
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"log"
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"net"
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"net/mail"
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"net/smtp"
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"time"
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)
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// sendCSPMail sends a CSP violation email to the in the config specified receiver
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func sendCSPMail(domain string, documentUri string, referrer string, violatedDirective string, originalPolicy string, blockedUri string) error {
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from := mail.Address{Name: "CSP-Handler", Address: Config.SenderEmail}
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body := "A CSP violation occurred for " + domain + " at " + documentUri + "\n\n**Additional info:** \nReferrer: " + referrer + "\nViolated directive: " + violatedDirective +
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"\nOriginal policy: " + originalPolicy + "\nBlocked URI: " + blockedUri + "\n\nThis violation happened at " + time.Now().UTC().Format(time.RFC1123Z) + "."
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host, _, _ := net.SplitHostPort(Config.SmtpAddress)
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auth := smtp.PlainAuth("", Config.SmtpUsername, Config.SmtpPassword, host)
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// Setup headers
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headers := make(map[string]string)
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headers["From"] = from.String()
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headers["To"] = Config.ReceiverEmail
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headers["Subject"] = "CSP violation report for " + domain
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headers["MIME-Version"] = "1.0"
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headers["Content-Type"] = "text/plain; charset=\"utf-8\""
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// Setup message
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var msg string
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for k, v := range headers {
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msg += fmt.Sprintf("%s: %s\r\n", k, v)
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}
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msg += "\r\n\r\n" + body
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err := smtp.SendMail(Config.SmtpAddress, auth, Config.SenderEmail, []string{Config.ReceiverEmail}, []byte(msg))
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if err != nil {
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log.Print("An error occurred while sending a csp violation mail:")
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log.Print(err)
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}
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return err
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}
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