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add WriteIsolationKey to MAC

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This commit is contained in:
Mathieu Fenniak 2025-08-19 11:18:32 -06:00 • committed by Earl Warren
parent 6c35ea4fd9
commit 4bd93294d4
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GPG key ID: 0579CB2928A78A00
4 changed files with 122 additions and 82 deletions
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179
act/artifactcache/handler_test.go
View file

@ -12,7 +12,6 @@ import (
"testing"
"time"
"code.forgejo.org/forgejo/runner/v9/testutils"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/timshannon/bolthold"
@ -23,21 +22,26 @@ const (
cacheRepo = "testuser/repo"
cacheRunnum = "1"
cacheTimestamp = "0"
cacheMac = "c13854dd1ac599d1d61680cd93c26b77ba0ee10f374a3408bcaea82f38ca1865"
cacheMac = "bc2e9167f9e310baebcead390937264e4c0b21d2fdd49f5b9470d54406099360"
)
var handlerExternalURL string
type AuthHeaderTransport struct {
T http.RoundTripper
WriteIsolationKey string
T http.RoundTripper
WriteIsolationKey string
OverrideDefaultMac string
}
func (t *AuthHeaderTransport) RoundTrip(req *http.Request) (*http.Response, error) {
req.Header.Set("Forgejo-Cache-Repo", cacheRepo)
req.Header.Set("Forgejo-Cache-RunNumber", cacheRunnum)
req.Header.Set("Forgejo-Cache-Timestamp", cacheTimestamp)
req.Header.Set("Forgejo-Cache-MAC", cacheMac)
if t.OverrideDefaultMac != "" {
req.Header.Set("Forgejo-Cache-MAC", t.OverrideDefaultMac)
} else {
req.Header.Set("Forgejo-Cache-MAC", cacheMac)
}
req.Header.Set("Forgejo-Cache-Host", handlerExternalURL)
if t.WriteIsolationKey != "" {
req.Header.Set("Forgejo-Cache-WriteIsolationKey", t.WriteIsolationKey)
@ -467,25 +471,28 @@ func TestHandler(t *testing.T) {
uploadCacheNormally(t, base, key, version, "TestWriteKey", make([]byte, 64))
httpClientTransport.WriteIsolationKey = "AnotherTestWriteKey"
resp, err := httpClient.Get(fmt.Sprintf("%s/cache?keys=%s&version=%s", base, key, version))
require.NoError(t, err)
require.Equal(t, 204, resp.StatusCode)
func() {
defer overrideWriteIsolationKey("AnotherTestWriteKey")()
resp, err := httpClient.Get(fmt.Sprintf("%s/cache?keys=%s&version=%s", base, key, version))
require.NoError(t, err)
require.Equal(t, 204, resp.StatusCode)
}()
httpClientTransport.WriteIsolationKey = ""
resp, err = httpClient.Get(fmt.Sprintf("%s/cache?keys=%s&version=%s", base, key, version))
require.NoError(t, err)
require.Equal(t, 204, resp.StatusCode)
{
resp, err := httpClient.Get(fmt.Sprintf("%s/cache?keys=%s&version=%s", base, key, version))
require.NoError(t, err)
require.Equal(t, 204, resp.StatusCode)
}
httpClientTransport.WriteIsolationKey = "TestWriteKey"
resp, err = httpClient.Get(fmt.Sprintf("%s/cache?keys=%s&version=%s", base, key, version))
require.NoError(t, err)
require.Equal(t, 200, resp.StatusCode)
func() {
defer overrideWriteIsolationKey("TestWriteKey")()
resp, err := httpClient.Get(fmt.Sprintf("%s/cache?keys=%s&version=%s", base, key, version))
require.NoError(t, err)
require.Equal(t, 200, resp.StatusCode)
}()
})
t.Run("find prefers WriteIsolationKey match", func(t *testing.T) {
defer func() { httpClientTransport.WriteIsolationKey = "" }()
version := "c19da02a2bd7e77277f1ac29ab45c09b7d46a4ee758284e26bb3045ad11d9d21"
key := strings.ToLower(t.Name())
@ -494,47 +501,51 @@ func TestHandler(t *testing.T) {
uploadCacheNormally(t, base, key, version, "", make([]byte, 128))
// We should read the value with the matching WriteIsolationKey from the cache...
httpClientTransport.WriteIsolationKey = "TestWriteKey"
resp, err := httpClient.Get(fmt.Sprintf("%s/cache?keys=%s&version=%s", base, key, version))
require.NoError(t, err)
require.Equal(t, 200, resp.StatusCode)
func() {
defer overrideWriteIsolationKey("TestWriteKey")()
got := struct {
ArchiveLocation string `json:"archiveLocation"`
}{}
require.NoError(t, json.NewDecoder(resp.Body).Decode(&got))
contentResp, err := httpClient.Get(got.ArchiveLocation)
require.NoError(t, err)
require.Equal(t, 200, contentResp.StatusCode)
content, err := io.ReadAll(contentResp.Body)
require.NoError(t, err)
// Which we finally check matches the correct WriteIsolationKey's content here.
assert.Equal(t, make([]byte, 64), content)
resp, err := httpClient.Get(fmt.Sprintf("%s/cache?keys=%s&version=%s", base, key, version))
require.NoError(t, err)
require.Equal(t, 200, resp.StatusCode)
got := struct {
ArchiveLocation string `json:"archiveLocation"`
}{}
require.NoError(t, json.NewDecoder(resp.Body).Decode(&got))
contentResp, err := httpClient.Get(got.ArchiveLocation)
require.NoError(t, err)
require.Equal(t, 200, contentResp.StatusCode)
content, err := io.ReadAll(contentResp.Body)
require.NoError(t, err)
// Which we finally check matches the correct WriteIsolationKey's content here.
assert.Equal(t, make([]byte, 64), content)
}()
})
t.Run("find falls back if matching WriteIsolationKey not available", func(t *testing.T) {
defer func() { httpClientTransport.WriteIsolationKey = "" }()
version := "c19da02a2bd7e77277f1ac29ab45c09b7d46a4ee758284e26bb3045ad11d9d21"
key := strings.ToLower(t.Name())
uploadCacheNormally(t, base, key, version, "", make([]byte, 128))
httpClientTransport.WriteIsolationKey = "TestWriteKey"
resp, err := httpClient.Get(fmt.Sprintf("%s/cache?keys=%s&version=%s", base, key, version))
require.NoError(t, err)
require.Equal(t, 200, resp.StatusCode)
func() {
defer overrideWriteIsolationKey("TestWriteKey")()
got := struct {
ArchiveLocation string `json:"archiveLocation"`
}{}
require.NoError(t, json.NewDecoder(resp.Body).Decode(&got))
contentResp, err := httpClient.Get(got.ArchiveLocation)
require.NoError(t, err)
require.Equal(t, 200, contentResp.StatusCode)
content, err := io.ReadAll(contentResp.Body)
require.NoError(t, err)
assert.Equal(t, make([]byte, 128), content)
resp, err := httpClient.Get(fmt.Sprintf("%s/cache?keys=%s&version=%s", base, key, version))
require.NoError(t, err)
require.Equal(t, 200, resp.StatusCode)
got := struct {
ArchiveLocation string `json:"archiveLocation"`
}{}
require.NoError(t, json.NewDecoder(resp.Body).Decode(&got))
contentResp, err := httpClient.Get(got.ArchiveLocation)
require.NoError(t, err)
require.Equal(t, 200, contentResp.StatusCode)
content, err := io.ReadAll(contentResp.Body)
require.NoError(t, err)
assert.Equal(t, make([]byte, 128), content)
}()
})
t.Run("case insensitive", func(t *testing.T) {
@ -666,7 +677,7 @@ func TestHandler(t *testing.T) {
})
t.Run("upload across WriteIsolationKey", func(t *testing.T) {
defer testutils.MockVariable(&httpClientTransport.WriteIsolationKey, "CorrectKey")()
defer overrideWriteIsolationKey("CorrectKey")()
key := strings.ToLower(t.Name())
version := "c19da02a2bd7e77277f1ac29ab45c09b7d46a4ee758284e26bb3045ad11d9d20"
@ -692,8 +703,8 @@ func TestHandler(t *testing.T) {
id = got.CacheID
}
// upload, but with the incorrect write isolation key relative to the cache obj created
{
httpClientTransport.WriteIsolationKey = "WrongKey"
func() {
defer overrideWriteIsolationKey("WrongKey")()
req, err := http.NewRequest(http.MethodPatch,
fmt.Sprintf("%s/caches/%d", base, id), bytes.NewReader(content))
require.NoError(t, err)
@ -702,11 +713,11 @@ func TestHandler(t *testing.T) {
resp, err := httpClient.Do(req)
require.NoError(t, err)
assert.Equal(t, 403, resp.StatusCode)
}
}()
})
t.Run("commit across WriteIsolationKey", func(t *testing.T) {
defer testutils.MockVariable(&httpClientTransport.WriteIsolationKey, "CorrectKey")()
defer overrideWriteIsolationKey("CorrectKey")()
key := strings.ToLower(t.Name())
version := "c19da02a2bd7e77277f1ac29ab45c09b7d46a4ee758284e26bb3045ad11d9d20"
@ -743,12 +754,12 @@ func TestHandler(t *testing.T) {
assert.Equal(t, 200, resp.StatusCode)
}
// commit, but with the incorrect write isolation key relative to the cache obj created
{
httpClientTransport.WriteIsolationKey = "WrongKey"
func() {
defer overrideWriteIsolationKey("WrongKey")()
resp, err := httpClient.Post(fmt.Sprintf("%s/caches/%d", base, id), "", nil)
require.NoError(t, err)
assert.Equal(t, 403, resp.StatusCode)
}
}()
})
t.Run("get across WriteIsolationKey", func(t *testing.T) {
@ -762,8 +773,8 @@ func TestHandler(t *testing.T) {
// Perform the 'get' without the right WriteIsolationKey for the cache entry... should be OK for `key` since it
// was written with WriteIsolationKey "" meaning it is available for non-isolated access
{
httpClientTransport.WriteIsolationKey = "WhoopsWrongKey"
func() {
defer overrideWriteIsolationKey("WhoopsWrongKey")()
resp, err := httpClient.Get(fmt.Sprintf("%s/cache?keys=%s&version=%s", base, key, version))
require.NoError(t, err)
@ -777,30 +788,52 @@ func TestHandler(t *testing.T) {
require.NoError(t, err)
require.Equal(t, 200, contentResp.StatusCode)
httpClientTransport.WriteIsolationKey = "CorrectKey" // reset for next find
}
}()
// Perform the 'get' without the right WriteIsolationKey for the cache entry... should be 403 for `keyIsolated`
// because it was written with a different WriteIsolationKey.
{
httpClientTransport.WriteIsolationKey = "CorrectKey" // for test purposes make the `find` successful...
resp, err := httpClient.Get(fmt.Sprintf("%s/cache?keys=%s&version=%s", base, keyIsolated, version))
require.NoError(t, err)
require.Equal(t, 200, resp.StatusCode)
got := struct {
got := func() struct {
ArchiveLocation string `json:"archiveLocation"`
}{}
require.NoError(t, json.NewDecoder(resp.Body).Decode(&got))
} {
defer overrideWriteIsolationKey("CorrectKey")() // for test purposes make the `find` successful...
resp, err := httpClient.Get(fmt.Sprintf("%s/cache?keys=%s&version=%s", base, keyIsolated, version))
require.NoError(t, err)
require.Equal(t, 200, resp.StatusCode)
got := struct {
ArchiveLocation string `json:"archiveLocation"`
}{}
require.NoError(t, json.NewDecoder(resp.Body).Decode(&got))
return got
}()
httpClientTransport.WriteIsolationKey = "WhoopsWrongKey" // but then access w/ the wrong key for `get`
contentResp, err := httpClient.Get(got.ArchiveLocation)
require.NoError(t, err)
require.Equal(t, 403, contentResp.StatusCode)
func() {
defer overrideWriteIsolationKey("WhoopsWrongKey")() // but then access w/ the wrong key for `get`
contentResp, err := httpClient.Get(got.ArchiveLocation)
require.NoError(t, err)
require.Equal(t, 403, contentResp.StatusCode)
}()
}
})
}
func overrideWriteIsolationKey(writeIsolationKey string) func() {
originalWriteIsolationKey := httpClientTransport.WriteIsolationKey
originalMac := httpClientTransport.OverrideDefaultMac
httpClientTransport.WriteIsolationKey = writeIsolationKey
httpClientTransport.OverrideDefaultMac = computeMac("secret", cacheRepo, cacheRunnum, cacheTimestamp, httpClientTransport.WriteIsolationKey)
return func() {
httpClientTransport.WriteIsolationKey = originalWriteIsolationKey
httpClientTransport.OverrideDefaultMac = originalMac
}
}
func uploadCacheNormally(t *testing.T, base, key, version, writeIsolationKey string, content []byte) {
defer testutils.MockVariable(&httpClientTransport.WriteIsolationKey, writeIsolationKey)()
if writeIsolationKey != "" {
defer overrideWriteIsolationKey(writeIsolationKey)()
}
var id uint64
{

6
act/artifactcache/mac.go
View file

@ -22,7 +22,7 @@ func (h *Handler) validateMac(rundata cacheproxy.RunData) (string, error) {
return "", ErrValidation
}
expectedMAC := computeMac(h.secret, rundata.RepositoryFullName, rundata.RunNumber, rundata.Timestamp)
expectedMAC := computeMac(h.secret, rundata.RepositoryFullName, rundata.RunNumber, rundata.Timestamp, rundata.WriteIsolationKey)
if hmac.Equal([]byte(expectedMAC), []byte(rundata.RepositoryMAC)) {
return rundata.RepositoryFullName, nil
}
@ -40,12 +40,14 @@ func validateAge(ts string) bool {
return true
}
func computeMac(secret, repo, run, ts string) string {
func computeMac(secret, repo, run, ts, writeIsolationKey string) string {
mac := hmac.New(sha256.New, []byte(secret))
mac.Write([]byte(repo))
mac.Write([]byte(">"))
mac.Write([]byte(run))
mac.Write([]byte(">"))
mac.Write([]byte(ts))
mac.Write([]byte(">"))
mac.Write([]byte(writeIsolationKey))
return hex.EncodeToString(mac.Sum(nil))
}

13
act/artifactcache/mac_test.go
View file

@ -19,7 +19,7 @@ func TestMac(t *testing.T) {
run := "1"
ts := strconv.FormatInt(time.Now().Unix(), 10)
mac := computeMac(handler.secret, name, run, ts)
mac := computeMac(handler.secret, name, run, ts, "")
rundata := cacheproxy.RunData{
RepositoryFullName: name,
RunNumber: run,
@ -37,7 +37,7 @@ func TestMac(t *testing.T) {
run := "1"
ts := "9223372036854775807" // This should last us for a while...
mac := computeMac(handler.secret, name, run, ts)
mac := computeMac(handler.secret, name, run, ts, "")
rundata := cacheproxy.RunData{
RepositoryFullName: name,
RunNumber: run,
@ -72,9 +72,12 @@ func TestMac(t *testing.T) {
run := "42"
ts := "1337"
mac := computeMac(secret, name, run, ts)
expectedMac := "f666f06f917acb7186e152195b2a8c8d36d068ce683454be0878806e08e04f2b" // * Precomputed, anytime the computeMac function changes this needs to be recalculated
mac := computeMac(secret, name, run, ts, "")
expectedMac := "4754474b21329e8beadd2b4054aa4be803965d66e710fa1fee091334ed804f29" // * Precomputed, anytime the computeMac function changes this needs to be recalculated
require.Equal(t, expectedMac, mac)
require.Equal(t, mac, expectedMac)
mac = computeMac(secret, name, run, ts, "refs/pull/12/head")
expectedMac = "9ca8f4cb5e1b083ee8cd215215bc00f379b28511d3ef7930bf054767de34766d" // * Precomputed, anytime the computeMac function changes this needs to be recalculated
require.Equal(t, expectedMac, mac)
})
}

6
act/cacheproxy/handler.go
View file

@ -55,7 +55,7 @@ type RunData struct {
}
func (h *Handler) CreateRunData(fullName, runNumber, timestamp, writeIsolationKey string) RunData {
mac := computeMac(h.cacheSecret, fullName, runNumber, timestamp)
mac := computeMac(h.cacheSecret, fullName, runNumber, timestamp, writeIsolationKey)
return RunData{
RepositoryFullName: fullName,
RunNumber: runNumber,
@ -212,12 +212,14 @@ func (h *Handler) Close() error {
return retErr
}
func computeMac(secret, repo, run, ts string) string {
func computeMac(secret, repo, run, ts, writeIsolationKey string) string {
mac := hmac.New(sha256.New, []byte(secret))
mac.Write([]byte(repo))
mac.Write([]byte(">"))
mac.Write([]byte(run))
mac.Write([]byte(">"))
mac.Write([]byte(ts))
mac.Write([]byte(">"))
mac.Write([]byte(writeIsolationKey))
return hex.EncodeToString(mac.Sum(nil))
}