You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
116 lines
3.8 KiB
116 lines
3.8 KiB
// Copyright 2015 clair authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package dpkg
|
|
|
|
import (
|
|
"bufio"
|
|
"regexp"
|
|
"strings"
|
|
|
|
"github.com/coreos/clair/database"
|
|
"github.com/coreos/clair/utils/types"
|
|
"github.com/coreos/clair/worker/detectors"
|
|
"github.com/coreos/pkg/capnslog"
|
|
)
|
|
|
|
var (
|
|
log = capnslog.NewPackageLogger("github.com/coreos/clair", "worker/detectors/packages")
|
|
|
|
dpkgSrcCaptureRegexp = regexp.MustCompile(`Source: (?P<name>[^\s]*)( \((?P<version>.*)\))?`)
|
|
dpkgSrcCaptureRegexpNames = dpkgSrcCaptureRegexp.SubexpNames()
|
|
)
|
|
|
|
// DpkgFeaturesDetector implements FeaturesDetector and detects dpkg packages
|
|
type DpkgFeaturesDetector struct{}
|
|
|
|
func init() {
|
|
detectors.RegisterFeaturesDetector("dpkg", &DpkgFeaturesDetector{})
|
|
}
|
|
|
|
// Detect detects packages using var/lib/dpkg/status from the input data
|
|
func (detector *DpkgFeaturesDetector) Detect(data map[string][]byte) ([]database.FeatureVersion, error) {
|
|
f, hasFile := data["var/lib/dpkg/status"]
|
|
if !hasFile {
|
|
return []database.FeatureVersion{}, nil
|
|
}
|
|
|
|
// Create a map to store packages and ensure their uniqueness
|
|
packagesMap := make(map[string]database.FeatureVersion)
|
|
|
|
var pkg database.FeatureVersion
|
|
var err error
|
|
scanner := bufio.NewScanner(strings.NewReader(string(f)))
|
|
for scanner.Scan() {
|
|
line := scanner.Text()
|
|
|
|
if strings.HasPrefix(line, "Package: ") {
|
|
// Package line
|
|
// Defines the name of the package
|
|
|
|
pkg.Feature.Name = strings.TrimSpace(strings.TrimPrefix(line, "Package: "))
|
|
pkg.Version = types.Version{}
|
|
} else if strings.HasPrefix(line, "Source: ") {
|
|
// Source line (Optionnal)
|
|
// Gives the name of the source package
|
|
// May also specifies a version
|
|
|
|
srcCapture := dpkgSrcCaptureRegexp.FindAllStringSubmatch(line, -1)[0]
|
|
md := map[string]string{}
|
|
for i, n := range srcCapture {
|
|
md[dpkgSrcCaptureRegexpNames[i]] = strings.TrimSpace(n)
|
|
}
|
|
|
|
pkg.Feature.Name = md["name"]
|
|
if md["version"] != "" {
|
|
pkg.Version, err = types.NewVersion(md["version"])
|
|
if err != nil {
|
|
log.Warningf("could not parse package version '%s': %s. skipping", line[1], err.Error())
|
|
}
|
|
}
|
|
} else if strings.HasPrefix(line, "Version: ") && pkg.Version.String() == "" {
|
|
// Version line
|
|
// Defines the version of the package
|
|
// This version is less important than a version retrieved from a Source line
|
|
// because the Debian vulnerabilities often skips the epoch from the Version field
|
|
// which is not present in the Source version, and because +bX revisions don't matter
|
|
pkg.Version, err = types.NewVersion(strings.TrimPrefix(line, "Version: "))
|
|
if err != nil {
|
|
log.Warningf("could not parse package version '%s': %s. skipping", line[1], err.Error())
|
|
}
|
|
}
|
|
|
|
// Add the package to the result array if we have all the informations
|
|
if pkg.Feature.Name != "" && pkg.Version.String() != "" {
|
|
packagesMap[pkg.Feature.Name+"#"+pkg.Version.String()] = pkg
|
|
pkg.Feature.Name = ""
|
|
pkg.Version = types.Version{}
|
|
}
|
|
}
|
|
|
|
// Convert the map to a slice
|
|
packages := make([]database.FeatureVersion, 0, len(packagesMap))
|
|
for _, pkg := range packagesMap {
|
|
packages = append(packages, pkg)
|
|
}
|
|
|
|
return packages, nil
|
|
}
|
|
|
|
// GetRequiredFiles returns the list of files required for Detect, without
|
|
// leading /
|
|
func (detector *DpkgFeaturesDetector) GetRequiredFiles() []string {
|
|
return []string{"var/lib/dpkg/status"}
|
|
}
|