fb32dcfa58
Main Clair logic is changed in worker, updater, notifier for better adapting ancestry schema. Extensions are updated with the new model and feature lister and namespace detector drivers are able to specify the specific listers and detectors used to process layer's content. InRange and GetFixedIn interfaces are added to Version format for adapting ranged affected features and next available fixed in in the future. Tests for worker, updater and extensions are fixed.
124 lines
3.7 KiB
Go
124 lines
3.7 KiB
Go
// Copyright 2017 clair authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package dpkg implements a featurefmt.Lister for dpkg packages.
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package dpkg
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import (
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"bufio"
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"regexp"
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"strings"
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log "github.com/sirupsen/logrus"
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"github.com/coreos/clair/database"
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"github.com/coreos/clair/ext/featurefmt"
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"github.com/coreos/clair/ext/versionfmt"
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"github.com/coreos/clair/ext/versionfmt/dpkg"
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"github.com/coreos/clair/pkg/tarutil"
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)
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var (
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dpkgSrcCaptureRegexp = regexp.MustCompile(`Source: (?P<name>[^\s]*)( \((?P<version>.*)\))?`)
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dpkgSrcCaptureRegexpNames = dpkgSrcCaptureRegexp.SubexpNames()
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)
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type lister struct{}
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func init() {
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featurefmt.RegisterLister("dpkg", dpkg.ParserName, &lister{})
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}
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func (l lister) ListFeatures(files tarutil.FilesMap) ([]database.Feature, error) {
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f, hasFile := files["var/lib/dpkg/status"]
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if !hasFile {
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return []database.Feature{}, nil
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}
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// Create a map to store packages and ensure their uniqueness
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packagesMap := make(map[string]database.Feature)
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var pkg database.Feature
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var err error
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scanner := bufio.NewScanner(strings.NewReader(string(f)))
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for scanner.Scan() {
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line := scanner.Text()
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if strings.HasPrefix(line, "Package: ") {
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// Package line
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// Defines the name of the package
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pkg.Name = strings.TrimSpace(strings.TrimPrefix(line, "Package: "))
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pkg.Version = ""
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} else if strings.HasPrefix(line, "Source: ") {
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// Source line (Optionnal)
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// Gives the name of the source package
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// May also specifies a version
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srcCapture := dpkgSrcCaptureRegexp.FindAllStringSubmatch(line, -1)[0]
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md := map[string]string{}
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for i, n := range srcCapture {
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md[dpkgSrcCaptureRegexpNames[i]] = strings.TrimSpace(n)
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}
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pkg.Name = md["name"]
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if md["version"] != "" {
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version := md["version"]
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err = versionfmt.Valid(dpkg.ParserName, version)
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if err != nil {
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log.WithError(err).WithField("version", string(line[1])).Warning("could not parse package version. skipping")
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} else {
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pkg.Version = version
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}
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}
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} else if strings.HasPrefix(line, "Version: ") && pkg.Version == "" {
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// Version line
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// Defines the version of the package
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// This version is less important than a version retrieved from a Source line
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// because the Debian vulnerabilities often skips the epoch from the Version field
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// which is not present in the Source version, and because +bX revisions don't matter
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version := strings.TrimPrefix(line, "Version: ")
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err = versionfmt.Valid(dpkg.ParserName, version)
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if err != nil {
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log.WithError(err).WithField("version", string(line[1])).Warning("could not parse package version. skipping")
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} else {
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pkg.Version = version
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}
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} else if line == "" {
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pkg.Name = ""
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pkg.Version = ""
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}
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// Add the package to the result array if we have all the informations
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if pkg.Name != "" && pkg.Version != "" {
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packagesMap[pkg.Name+"#"+pkg.Version] = pkg
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pkg.Name = ""
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pkg.Version = ""
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}
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}
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// Convert the map to a slice and add version format.
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packages := make([]database.Feature, 0, len(packagesMap))
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for _, pkg := range packagesMap {
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pkg.VersionFormat = dpkg.ParserName
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packages = append(packages, pkg)
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}
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return packages, nil
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}
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func (l lister) RequiredFilenames() []string {
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return []string{"var/lib/dpkg/status"}
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}
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