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354 lines
11 KiB
354 lines
11 KiB
commit f13c08e9f45d7776cb264b17ec41bc4ff51fc0b9
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Author: Andreas Gerstmayr <agerstmayr@redhat.com>
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Date: Thu Nov 25 18:49:52 2021 +0100
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notifications: use HMAC-SHA256 to generate time limit codes
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* changes the time limit code generation function to use HMAC-SHA256
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instead of SHA-1
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* multiple new testcases
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diff --git a/pkg/services/notifications/codes.go b/pkg/services/notifications/codes.go
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index ea9beb30cc..1ddf05dc69 100644
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--- a/pkg/services/notifications/codes.go
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+++ b/pkg/services/notifications/codes.go
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@@ -1,48 +1,53 @@
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package notifications
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import (
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- "crypto/sha1" // #nosec
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+ "crypto/hmac"
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+ "crypto/sha256"
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"encoding/hex"
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"fmt"
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+ "strconv"
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"time"
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- "github.com/unknwon/com"
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-
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"github.com/grafana/grafana/pkg/models"
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"github.com/grafana/grafana/pkg/setting"
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)
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-const timeLimitCodeLength = 12 + 6 + 40
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+const timeLimitStartDateLength = 12
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+const timeLimitMinutesLength = 6
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+const timeLimitHmacLength = 64
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+const timeLimitCodeLength = timeLimitStartDateLength + timeLimitMinutesLength + timeLimitHmacLength
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// create a time limit code
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-// code format: 12 length date time string + 6 minutes string + 40 sha1 encoded string
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-func createTimeLimitCode(data string, minutes int, startInf interface{}) (string, error) {
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+// code format: 12 length date time string + 6 minutes string + 64 HMAC-SHA256 encoded string
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+func createTimeLimitCode(payload string, minutes int, startStr string) (string, error) {
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format := "200601021504"
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var start, end time.Time
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- var startStr, endStr string
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+ var endStr string
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- if startInf == nil {
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+ if startStr == "" {
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// Use now time create code
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start = time.Now()
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startStr = start.Format(format)
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} else {
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// use start string create code
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- startStr = startInf.(string)
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- start, _ = time.ParseInLocation(format, startStr, time.Local)
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- startStr = start.Format(format)
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+ var err error
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+ start, err = time.ParseInLocation(format, startStr, time.Local)
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+ if err != nil {
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+ return "", err
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+ }
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}
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end = start.Add(time.Minute * time.Duration(minutes))
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endStr = end.Format(format)
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- // create sha1 encode string
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- sh := sha1.New()
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- if _, err := sh.Write([]byte(data + setting.SecretKey + startStr + endStr +
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- com.ToStr(minutes))); err != nil {
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- return "", err
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+ // create HMAC-SHA256 encoded string
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+ key := []byte(setting.SecretKey)
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+ h := hmac.New(sha256.New, key)
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+ if _, err := h.Write([]byte(payload + startStr + endStr)); err != nil {
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+ return "", fmt.Errorf("cannot create hmac: %v", err)
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}
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- encoded := hex.EncodeToString(sh.Sum(nil))
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+ encoded := hex.EncodeToString(h.Sum(nil))
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code := fmt.Sprintf("%s%06d%s", startStr, minutes, encoded)
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return code, nil
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@@ -50,30 +55,29 @@ func createTimeLimitCode(data string, minutes int, startInf interface{}) (string
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// verify time limit code
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func validateUserEmailCode(user *models.User, code string) (bool, error) {
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- if len(code) <= 18 {
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+ if len(code) < timeLimitCodeLength {
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return false, nil
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}
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- minutes := setting.EmailCodeValidMinutes
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code = code[:timeLimitCodeLength]
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// split code
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- start := code[:12]
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- lives := code[12:18]
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- if d, err := com.StrTo(lives).Int(); err == nil {
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- minutes = d
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+ startStr := code[:timeLimitStartDateLength]
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+ minutesStr := code[timeLimitStartDateLength : timeLimitStartDateLength+timeLimitMinutesLength]
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+ minutes, err := strconv.Atoi(minutesStr)
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+ if err != nil {
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+ return false, fmt.Errorf("invalid time limit code: %v", err)
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}
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- // right active code
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- data := com.ToStr(user.Id) + user.Email + user.Login + user.Password + user.Rands
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- retCode, err := createTimeLimitCode(data, minutes, start)
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+ // verify code
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+ payload := strconv.FormatInt(user.Id, 10) + user.Email + user.Login + user.Password + user.Rands
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+ expectedCode, err := createTimeLimitCode(payload, minutes, startStr)
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if err != nil {
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return false, err
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}
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- fmt.Printf("code : %s\ncode2: %s", retCode, code)
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- if retCode == code && minutes > 0 {
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+ if hmac.Equal([]byte(code), []byte(expectedCode)) && minutes > 0 {
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// check time is expired or not
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- before, _ := time.ParseInLocation("200601021504", start, time.Local)
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+ before, _ := time.ParseInLocation("200601021504", startStr, time.Local)
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now := time.Now()
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if before.Add(time.Minute*time.Duration(minutes)).Unix() > now.Unix() {
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return true, nil
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@@ -94,15 +98,15 @@ func getLoginForEmailCode(code string) string {
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return string(b)
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}
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-func createUserEmailCode(u *models.User, startInf interface{}) (string, error) {
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+func createUserEmailCode(user *models.User, startStr string) (string, error) {
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minutes := setting.EmailCodeValidMinutes
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- data := com.ToStr(u.Id) + u.Email + u.Login + u.Password + u.Rands
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- code, err := createTimeLimitCode(data, minutes, startInf)
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+ payload := strconv.FormatInt(user.Id, 10) + user.Email + user.Login + user.Password + user.Rands
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+ code, err := createTimeLimitCode(payload, minutes, startStr)
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if err != nil {
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return "", err
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}
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// add tail hex username
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- code += hex.EncodeToString([]byte(u.Login))
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+ code += hex.EncodeToString([]byte(user.Login))
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return code, nil
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}
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diff --git a/pkg/services/notifications/codes_test.go b/pkg/services/notifications/codes_test.go
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index d2b1f3a617..bea88e0bf5 100644
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--- a/pkg/services/notifications/codes_test.go
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+++ b/pkg/services/notifications/codes_test.go
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@@ -1,19 +1,129 @@
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package notifications
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import (
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+ "fmt"
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+ "strconv"
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"testing"
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+ "time"
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"github.com/grafana/grafana/pkg/models"
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"github.com/grafana/grafana/pkg/setting"
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. "github.com/smartystreets/goconvey/convey"
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+ "github.com/stretchr/testify/require"
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)
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+func TestTimeLimitCodes(t *testing.T) {
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+ user := &models.User{Id: 10, Email: "t@a.com", Login: "asd", Password: "1", Rands: "2"}
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+
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+ format := "200601021504"
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+ mailPayload := strconv.FormatInt(user.Id, 10) + user.Email + user.Login + user.Password + user.Rands
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+ tenMinutesAgo := time.Now().Add(-time.Minute * 10)
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+
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+ tests := []struct {
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+ desc string
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+ payload string
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+ start time.Time
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+ minutes int
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+ valid bool
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+ }{
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+ {
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+ desc: "code generated 10 minutes ago, 5 minutes valid",
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+ payload: mailPayload,
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+ start: tenMinutesAgo,
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+ minutes: 5,
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+ valid: false,
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+ },
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+ {
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+ desc: "code generated 10 minutes ago, 9 minutes valid",
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+ payload: mailPayload,
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+ start: tenMinutesAgo,
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+ minutes: 9,
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+ valid: false,
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+ },
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+ {
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+ desc: "code generated 10 minutes ago, 10 minutes valid",
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+ payload: mailPayload,
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+ start: tenMinutesAgo,
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+ minutes: 10,
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+ // code was valid exactly 10 minutes since evaluating the tenMinutesAgo assignment
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+ // by the time this test is run the code is already expired
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+ valid: false,
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+ },
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+ {
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+ desc: "code generated 10 minutes ago, 11 minutes valid",
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+ payload: mailPayload,
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+ start: tenMinutesAgo,
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+ minutes: 11,
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+ valid: true,
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+ },
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+ {
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+ desc: "code generated 10 minutes ago, 20 minutes valid",
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+ payload: mailPayload,
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+ start: tenMinutesAgo,
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+ minutes: 20,
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+ valid: true,
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+ },
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+ {
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+ desc: "code generated 10 minutes ago, 20 minutes valid, tampered payload",
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+ payload: mailPayload[:len(mailPayload)-1] + "x",
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+ start: tenMinutesAgo,
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+ minutes: 20,
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+ valid: false,
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+ },
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+ }
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+
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+ for _, test := range tests {
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+ t.Run(test.desc, func(t *testing.T) {
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+ code, err := createTimeLimitCode(test.payload, test.minutes, test.start.Format(format))
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+ require.NoError(t, err)
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+
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+ isValid, err := validateUserEmailCode(user, code)
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+ require.NoError(t, err)
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+ require.Equal(t, test.valid, isValid)
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+ })
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+ }
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+
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+ t.Run("tampered minutes", func(t *testing.T) {
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+ code, err := createTimeLimitCode(mailPayload, 5, tenMinutesAgo.Format(format))
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+ require.NoError(t, err)
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+
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+ // code is expired
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+ isValid, err := validateUserEmailCode(user, code)
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+ require.NoError(t, err)
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+ require.Equal(t, false, isValid)
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+
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+ // let's try to extend the code by tampering the minutes
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+ code = code[:12] + fmt.Sprintf("%06d", 20) + code[18:]
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+ isValid, err = validateUserEmailCode(user, code)
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+ require.NoError(t, err)
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+ require.Equal(t, false, isValid)
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+ })
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+
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+ t.Run("tampered start string", func(t *testing.T) {
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+ code, err := createTimeLimitCode(mailPayload, 5, tenMinutesAgo.Format(format))
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+ require.NoError(t, err)
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+
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+ // code is expired
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+ isValid, err := validateUserEmailCode(user, code)
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+ require.NoError(t, err)
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+ require.Equal(t, false, isValid)
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+
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+ // let's try to extend the code by tampering the start string
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+ oneMinuteAgo := time.Now().Add(-time.Minute)
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+
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+ code = oneMinuteAgo.Format(format) + code[12:]
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+ isValid, err = validateUserEmailCode(user, code)
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+ require.NoError(t, err)
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+ require.Equal(t, false, isValid)
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+ })
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+}
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+
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func TestEmailCodes(t *testing.T) {
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Convey("When generating code", t, func() {
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setting.EmailCodeValidMinutes = 120
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user := &models.User{Id: 10, Email: "t@a.com", Login: "asd", Password: "1", Rands: "2"}
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- code, err := createUserEmailCode(user, nil)
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+ code, err := createUserEmailCode(user, "")
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So(err, ShouldBeNil)
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Convey("getLoginForCode should return login", func() {
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@@ -27,7 +137,7 @@ func TestEmailCodes(t *testing.T) {
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So(isValid, ShouldBeTrue)
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})
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- Convey("Cannot verify in-valid code", func() {
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+ Convey("Cannot verify invalid code", func() {
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code = "ASD"
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isValid, err := validateUserEmailCode(user, code)
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So(err, ShouldBeNil)
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diff --git a/pkg/services/notifications/notifications.go b/pkg/services/notifications/notifications.go
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index beea82f43e..5a575d1415 100644
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--- a/pkg/services/notifications/notifications.go
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+++ b/pkg/services/notifications/notifications.go
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@@ -149,7 +149,7 @@ func (ns *NotificationService) sendEmailCommandHandler(cmd *models.SendEmailComm
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}
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func (ns *NotificationService) sendResetPasswordEmail(cmd *models.SendResetPasswordEmailCommand) error {
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- code, err := createUserEmailCode(cmd.User, nil)
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+ code, err := createUserEmailCode(cmd.User, "")
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if err != nil {
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return err
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}
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diff --git a/pkg/services/notifications/notifications_test.go b/pkg/services/notifications/notifications_test.go
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index e7680c3943..fb73e332ea 100644
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--- a/pkg/services/notifications/notifications_test.go
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+++ b/pkg/services/notifications/notifications_test.go
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@@ -1,12 +1,14 @@
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package notifications
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import (
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+ "regexp"
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"testing"
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"github.com/grafana/grafana/pkg/bus"
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"github.com/grafana/grafana/pkg/models"
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"github.com/grafana/grafana/pkg/setting"
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. "github.com/smartystreets/goconvey/convey"
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+ "github.com/stretchr/testify/require"
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)
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func TestNotifications(t *testing.T) {
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@@ -25,13 +27,28 @@ func TestNotifications(t *testing.T) {
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So(err, ShouldBeNil)
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Convey("When sending reset email password", func() {
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- err := ns.sendResetPasswordEmail(&models.SendResetPasswordEmailCommand{User: &models.User{Email: "asd@asd.com"}})
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+ user := models.User{Email: "asd@asd.com", Login: "asd@asd.com"}
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+ err := ns.sendResetPasswordEmail(&models.SendResetPasswordEmailCommand{User: &user})
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So(err, ShouldBeNil)
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sentMsg := <-ns.mailQueue
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So(sentMsg.Body, ShouldContainSubstring, "body")
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So(sentMsg.Subject, ShouldEqual, "Reset your Grafana password - asd@asd.com")
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So(sentMsg.Body, ShouldNotContainSubstring, "Subject")
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+
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+ // find code in mail
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+ r, _ := regexp.Compile(`code=(\w+)`)
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+ match := r.FindString(sentMsg.Body)
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+ code := match[len("code="):]
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+
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+ // verify code
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+ bus.AddHandler("test", func(query *models.GetUserByLoginQuery) error {
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+ query.Result = &user
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+ return nil
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+ })
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+ query := models.ValidateResetPasswordCodeQuery{Code: code}
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+ err = ns.validateResetPasswordCode(&query)
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+ require.NoError(t, err)
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})
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})
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}
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