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contrib: adapt analyze-local-images for new API

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pull/71/head
Jimmy Zelinskie 8 years ago
parent ec8cf9fb26
commit 001c0a73d3
1 changed files with 97 additions and 54 deletions
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151
contrib/analyze-local-images/main.go
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@ -22,7 +22,6 @@ import (
"flag"
"fmt"
"io/ioutil"
"log"
"net/http"
"os"
"os/exec"
@ -35,19 +34,20 @@ import (
const (
postLayerURI = "/v1/layers"
getLayerFeaturesURI = "/v1/layers/%s?features=true"
getLayerFeaturesURI = "/v1/layers/%s?vulnerabilities"
httpPort = 9279
)
func main() {
// Parse command-line arguments.
endpoint := flag.String("endpoint", "http://127.0.0.1:6060", "Address to Clair API")
myAddress := flag.String("my-address", "127.0.0.1", "Address from the point of view of Clair")
minimumPriority := flag.String("minimum-priority", "Low", "Minimum vulnerability vulnerability to show")
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage: %s [options] image-id\n\nOptions:\n", os.Args[0])
flag.PrintDefaults()
}
flag.Parse()
if len(flag.Args()) != 1 {
@ -56,46 +56,41 @@ func main() {
}
imageName := flag.Args()[0]
// Save image
// Save image.
fmt.Printf("Saving %s\n", imageName)
path, err := save(imageName)
defer os.RemoveAll(path)
if err != nil {
log.Fatalf("- Could not save image: %s\n", err)
fmt.Printf("- Could not save image: %s\n", err)
os.Exit(1)
}
// Retrieve history
// Retrieve history.
fmt.Println("Getting image's history")
layerIDs, err := historyFromManifest(path)
if err != nil {
layerIDs, err = historyFromCommand(imageName)
}
if err != nil || len(layerIDs) == 0 {
log.Fatalf("- Could not get image's history: %s\n", err)
fmt.Printf("- Could not get image's history: %s\n", err)
os.Exit(1)
}
// Setup a simple HTTP server if Clair is not local
// Setup a simple HTTP server if Clair is not local.
if !strings.Contains(*endpoint, "127.0.0.1") && !strings.Contains(*endpoint, "localhost") {
go func(path string) {
allowedHost := strings.TrimPrefix(*endpoint, "http://")
portIndex := strings.Index(allowedHost, ":")
if portIndex >= 0 {
allowedHost = allowedHost[:portIndex]
}
fmt.Printf("Setting up HTTP server (allowing: %s)\n", allowedHost)
allowedHost := strings.TrimPrefix(*endpoint, "http://")
portIndex := strings.Index(allowedHost, ":")
if portIndex >= 0 {
allowedHost = allowedHost[:portIndex]
}
err := http.ListenAndServe(":"+strconv.Itoa(httpPort), restrictedFileServer(path, allowedHost))
if err != nil {
log.Fatalf("- An error occurs with the HTTP Server: %s\n", err)
}
}(path)
go listenHTTP(path, allowedHost)
path = "http://" + *myAddress + ":" + strconv.Itoa(httpPort)
time.Sleep(200 * time.Millisecond)
}
// Analyze layers
// Analyze layers.
fmt.Printf("Analyzing %d layers\n", len(layerIDs))
for i := 0; i < len(layerIDs); i++ {
fmt.Printf("- Analyzing %s\n", layerIDs[i])
@ -107,32 +102,61 @@ func main() {
err = analyzeLayer(*endpoint, path+"/"+layerIDs[i]+"/layer.tar", layerIDs[i], "")
}
if err != nil {
log.Fatalf("- Could not analyze layer: %s\n", err)
fmt.Printf("- Could not analyze layer: %s\n", err)
os.Exit(1)
}
}
// Get vulnerabilities
fmt.Println("Getting image's features")
features, err := getFeatures(*endpoint, layerIDs[len(layerIDs)-1], *minimumPriority)
// Get vulnerabilities.
fmt.Println("Getting image's vulnerabilities")
layer, err := getLayer(*endpoint, layerIDs[len(layerIDs)-1])
if err != nil {
log.Fatalf("- Could not get features: %s\n", err)
fmt.Printf("- Could not get layer information: %s\n", err)
os.Exit(1)
}
// Print report.
fmt.Printf("\n# Clair report for image %s (%s)\n", imageName, time.Now().UTC())
if len(layer.Features) == 0 {
fmt.Println("No feature has been detected on the image.")
fmt.Println("This usually means that the image isn't supported by Clair.")
os.Exit(0)
}
isSafe := true
for _, feature := range features {
if len(feature.Vulnerabilities) != 0 {
for _, feature := range layer.Features {
fmt.Printf("## Feature: %s %s (%s)\n", feature.Name, feature.Version, feature.Namespace)
if len(feature.Vulnerabilities) > 0 {
isSafe = false
fmt.Printf("- # Feature: %s %s %s\n", feature.Name, feature.Namespace, feature.Version)
fmt.Printf(" - Added by: %s\n", feature.AddedBy)
for _, vulnerability := range feature.Vulnerabilities {
fmt.Printf("\t - Name: %s\n", vulnerability.Name)
fmt.Printf("\t - Priority: %s\n", vulnerability.Severity)
fmt.Printf("\t - Link: %s\n", vulnerability.Link)
fmt.Printf("\t - Description: %s\n", vulnerability.Description)
fmt.Printf("### (%s) %s\n", vulnerability.Severity, vulnerability.Name)
if vulnerability.Description != "" {
fmt.Printf(" - Link: %s\n", vulnerability.Link)
}
if vulnerability.Link != "" {
fmt.Printf(" - Description: %s\n", vulnerability.Description)
}
if vulnerability.FixedBy != "" {
fmt.Printf(" - Fixed version: %s\n", vulnerability.FixedBy)
}
if len(vulnerability.Metadata) > 0 {
fmt.Printf(" - Metadata: %+v\n", vulnerability.Metadata)
}
}
}
}
if isSafe {
fmt.Println("Bravo, your image looks SAFE !")
fmt.Println("\nBravo, your image looks SAFE !")
}
}
@ -228,8 +252,37 @@ func historyFromCommand(imageName string) ([]string, error) {
return layers, nil
}
func listenHTTP(path, allowedHost string) {
fmt.Printf("Setting up HTTP server (allowing: %s)\n", allowedHost)
restrictedFileServer := func(path, allowedHost string) http.Handler {
fc := func(w http.ResponseWriter, r *http.Request) {
if r.Host == allowedHost {
http.FileServer(http.Dir(path)).ServeHTTP(w, r)
return
}
w.WriteHeader(403)
}
return http.HandlerFunc(fc)
}
err := http.ListenAndServe(":"+strconv.Itoa(httpPort), restrictedFileServer(path, allowedHost))
if err != nil {
fmt.Printf("- An error occurs with the HTTP server: %s\n", err)
os.Exit(1)
}
}
func analyzeLayer(endpoint, path, layerName, parentLayerName string) error {
payload := v1.LayerEnvelope{Layer: &v1.Layer{Name: layerName, Path: path, ParentName: parentLayerName, Format: "Docker"}}
payload := v1.LayerEnvelope{
Layer: &v1.Layer{
Name: layerName,
Path: path,
ParentName: parentLayerName,
Format: "Docker",
},
}
jsonPayload, err := json.Marshal(payload)
if err != nil {
return err
@ -250,41 +303,31 @@ func analyzeLayer(endpoint, path, layerName, parentLayerName string) error {
if response.StatusCode != 201 {
body, _ := ioutil.ReadAll(response.Body)
return fmt.Errorf("Got response %d with message %s", response.StatusCode, string(body))
return fmt.Errorf("- Got response %d with message %s", response.StatusCode, string(body))
}
return nil
}
func getFeatures(endpoint, layerID, minimumPriority string) ([]v1.Feature, error) {
func getLayer(endpoint, layerID string) (v1.Layer, error) {
response, err := http.Get(endpoint + fmt.Sprintf(getLayerFeaturesURI, layerID))
if err != nil {
return []v1.Feature{}, err
return v1.Layer{}, err
}
defer response.Body.Close()
if response.StatusCode != 200 {
body, _ := ioutil.ReadAll(response.Body)
return []v1.Feature{}, fmt.Errorf("Got response %d with message %s", response.StatusCode, string(body))
err := fmt.Errorf("- Got response %d with message %s", response.StatusCode, string(body))
return v1.Layer{}, err
}
var apiResponse v1.LayerEnvelope
if err = json.NewDecoder(response.Body).Decode(&apiResponse); err != nil {
return []v1.Feature{}, err
return v1.Layer{}, err
} else if apiResponse.Error != nil {
return []v1.Feature{}, errors.New(apiResponse.Error.Message)
return v1.Layer{}, errors.New(apiResponse.Error.Message)
}
return apiResponse.Layer.Features, nil
}
func restrictedFileServer(path, allowedHost string) http.Handler {
fc := func(w http.ResponseWriter, r *http.Request) {
if r.Host == allowedHost {
http.FileServer(http.Dir(path)).ServeHTTP(w, r)
return
}
w.WriteHeader(403)
}
return http.HandlerFunc(fc)
return *apiResponse.Layer, nil
}

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