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rt.go
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rt.go
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package tracker
import (
"bytes"
"crypto/tls"
"crypto/x509"
"encoding/json"
"errors"
"fmt"
"github.com/blackjack/syslog"
"github.com/mikkolehtisalo/cvesync/nvd"
"io/ioutil"
"net/http"
"net/http/cookiejar"
"net/url"
"regexp"
"strconv"
"strings"
"text/template"
)
type RT struct {
BaseURL string
CAFile string
Username string
Password string
Queue string
HighPriority string
MediumPriority string
LowPriority string
TemplateFile string
Template *template.Template
}
func (rt *RT) Init() {
// Loading RT related settings
b, err := ioutil.ReadFile("/opt/cvesync/etc/rt.json")
if err != nil {
syslog.Errf("Unable to read RT settings file: %v", err)
panic(err)
}
err = json.Unmarshal(b, &rt)
if err != nil {
syslog.Errf("Unable to unmarshal RT settings json: %v", err)
panic(err)
}
rt.Template, err = template.New("rt.templ").ParseFiles(rt.TemplateFile)
if err != nil {
syslog.Errf("Unable to parse RT template file: %v", err)
panic(err)
}
}
func (rt RT) authenticate(jar *cookiejar.Jar) error {
client := &http.Client{
Jar: jar,
}
data := url.Values{}
data.Add("user", rt.Username)
data.Add("pass", rt.Password)
client.PostForm(rt.BaseURL, data)
// Check that we got back at least one cookie -> probably successful authentication!
// Alternatively could check that RT_SID_url.80 exists
url, err := url.Parse(rt.BaseURL)
if err != nil {
syslog.Errf("Unable to parse BaseURL: %v", err)
panic(err)
}
if len(jar.Cookies(url)) < 1 {
return errors.New("Authentication to RT failed!")
}
return nil
}
type RTTicket struct {
Subject string
Queue string
Priority string
Text string
}
// RT requires that the lines in description are indented.
func indent_text(s string) string {
lines := strings.Split(s, "\n")
for x, _ := range lines {
lines[x] = " " + lines[x]
}
return strings.Join(lines, "\n")
}
func (rt RT) build_text(e nvd.Entry) string {
var result bytes.Buffer
err := rt.Template.Execute(&result, e)
if err != nil {
syslog.Errf("Unable to execute RT template file: %v", err)
panic(err)
}
return result.String()
}
func (rt RT) build_ticket(e nvd.Entry) (RTTicket, error) {
ticket := RTTicket{}
subject := fmt.Sprintf("%v: %v", e.Id, e.Summary)
// Effectively cut the summary at 200 characters (limit is at 255?)
if len(subject) > 200 {
subject = subject[:200] + "..."
}
ticket.Subject = subject
ticket.Queue = rt.Queue
// Priority
score_float64, err := strconv.ParseFloat(e.CVSS.Score, 64)
if err != nil {
// Some CVEs have no CVSS score set yet, this is ok!
// If err, then score_float64 to 4.0 => medium
score_float64 = float64(4.0)
}
ticket.Priority = rt.LowPriority
if score_float64 >= 4.0 {
ticket.Priority = rt.MediumPriority
}
if score_float64 >= 7.0 {
ticket.Priority = rt.HighPriority
}
ticket.Text = indent_text(rt.build_text(e))
return ticket, nil
}
func (rt RT) Add(e nvd.Entry) (string, error) {
// Authenticate against RT for this operation
jar, err := cookiejar.New(nil)
if err != nil {
syslog.Errf("Unable to create cookie jar: %v", err)
panic(err)
}
err = rt.authenticate(jar)
if err != nil {
syslog.Errf("%v", err)
return "", err
}
// Build ticket information...
ticket, err := rt.build_ticket(e)
if err != nil {
return "", err
}
// Build the request
request := fmt.Sprintf("id: ticket/new\nQueue: %v\nSubject: %v\nPriority: %v\nText:%v\n", ticket.Queue, ticket.Subject, ticket.Priority, ticket.Text)
id, err := rt_request("POST", rt.BaseURL+"/REST/1.0/ticket/new", rt.CAFile, jar, request)
return id, err
}
func rt_request(reqtype string, path string, cafile string, jar *cookiejar.Jar, ticket string) (string, error) {
var client *http.Client
// If https, add CA certificate checking
if strings.HasPrefix(path, "https://") {
capool := x509.NewCertPool()
cacert, err := ioutil.ReadFile(cafile)
if err != nil {
syslog.Errf("Unable to read CA file: %v", err)
return "", err
}
capool.AppendCertsFromPEM(cacert)
// Check server certificate
tr := &http.Transport{
TLSClientConfig: &tls.Config{RootCAs: capool},
}
client = &http.Client{Transport: tr, Jar: jar}
} else {
client = &http.Client{Jar: jar}
}
data := url.Values{}
data.Add("content", ticket)
req, err := http.NewRequest(reqtype, path, strings.NewReader(data.Encode()))
if err != nil {
return "", err
}
// We are handling "form"
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
// Make RT's anti-XSS happy
req.Header.Set("Referer", path)
// Request!
resp, err := client.Do(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", err
}
ticketid := get_ticket_id(string(body))
return ticketid, nil
}
// Gets the RT's ticket id
func get_ticket_id(body string) string {
regexp := regexp.MustCompile("# Ticket (\\d+) created.")
result := ""
for _, x := range strings.Split(body, "\n") {
if regexp.MatchString(x) {
id := regexp.FindAllStringSubmatch(x, -1)
result = id[0][1]
}
}
return result
}
func (rt RT) Update(e nvd.Entry, ticketid string) error {
// Authenticate against RT for this operation
jar, err := cookiejar.New(nil)
if err != nil {
syslog.Errf("Unable to create cookie jar: %v", err)
panic(err)
}
err = rt.authenticate(jar)
if err != nil {
syslog.Errf("%v", err)
return err
}
// Build ticket information...
ticket, err := rt.build_ticket(e)
if err != nil {
return err
}
// Build the request
request := fmt.Sprintf("Queue: %v\nSubject: %v\nPriority: %v\nText:%v\n", ticket.Queue, ticket.Subject, ticket.Priority, ticket.Text)
_, err = rt_request("POST", rt.BaseURL+"/REST/1.0/ticket/"+ticketid+"/edit", rt.CAFile, jar, request)
if err != nil {
return err
}
// For some reason the RT doesn't react to Text on ticket/edit
// Adding the new text as comment
comment_request := fmt.Sprintf("id: %v\nAction: comment\nText:%v\n", ticketid, ticket.Text)
_, err = rt_request("POST", rt.BaseURL+"/REST/1.0/ticket/"+ticketid+"/comment", rt.CAFile, jar, comment_request)
return err
}