forked from facebookincubator/nvdtools
/
main.go
130 lines (113 loc) · 3.14 KB
/
main.go
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// Copyright (c) Facebook, Inc. and its affiliates.
//
// 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 main
import (
"encoding/csv"
"flag"
"fmt"
"io"
"os"
"strings"
"github.com/facebookincubator/flog"
"github.com/Daviid-P/nvdtools/providers/redhat"
"github.com/Daviid-P/nvdtools/rpm"
)
func main() {
var cfg config
cfg.addFlags()
flog.AddFlags(flag.CommandLine, nil)
flag.Parse()
if err := cfg.validate(); err != nil {
flog.Fatal(err)
}
if flag.NArg() != 1 {
flog.Fatalf("expecting one argument: feed path. got %d", flag.NArg())
}
feed, err := redhat.LoadFeed(flag.Arg(0))
if err != nil {
flog.Fatal(err)
}
chk, err := feed.Checker()
if err != nil {
flog.Fatal(err)
}
// adjust indexes
cfg.pkgs--
cfg.distro--
cfg.cve--
if err := filter(chk, &cfg, os.Stdin, os.Stdout); err != nil {
flog.Fatal(err)
}
}
func filter(chk rpm.Checker, cfg *config, r io.Reader, w io.Writer) error {
cr := csv.NewReader(r)
cw := csv.NewWriter(w)
for {
// read
row, err := cr.Read()
if err == io.EOF {
return nil
}
if err != nil {
return err
}
// check indexes
if err := cfg.checkIndexes(len(row)); err != nil {
return err
}
// filter
pkgs := strings.Split(row[cfg.pkgs], cfg.pkgsSep)
filtered, err := rpm.FilterFixedPackages(chk, pkgs, row[cfg.distro], row[cfg.cve])
if err != nil {
return fmt.Errorf("failed to filter packages: %v", err)
}
row[cfg.pkgs] = strings.Join(filtered, cfg.pkgsSep)
// write
if err := cw.Write(row); err != nil {
return err
}
cw.Flush()
if err := cw.Error(); err != nil {
return err
}
}
}
type config struct {
pkgs, distro, cve int
pkgsSep string
}
func (cfg *config) addFlags() {
flag.IntVar(&cfg.pkgs, "pkgs", 0, "csv field which holds the packages. starts with 1")
flag.IntVar(&cfg.distro, "distro", 0, "csv field which holds the distribution CPE. starts with 1")
flag.IntVar(&cfg.cve, "cve", 0, "csv field which holds the CVE. starts with 1")
flag.StringVar(&cfg.pkgsSep, "pkgs-sep", "\x02", "separator to use for the packages field")
}
func (cfg *config) validate() error {
if cfg.pkgs <= 0 || cfg.distro <= 0 || cfg.cve <= 0 {
flog.Fatalf("indexes must be postive: distro=%d pkgs=%d cve=%d", cfg.distro, cfg.pkgs, cfg.cve)
}
return nil
}
func (cfg *config) checkIndexes(n int) error {
if cfg.pkgs >= n {
return fmt.Errorf("not enough fields. have %d fields but pkgs index is %d", n, cfg.pkgs+1)
}
if cfg.distro >= n {
return fmt.Errorf("not enough fields. have %d fields but distro index is %d", n, cfg.distro+1)
}
if cfg.cve >= n {
return fmt.Errorf("not enough fields. have %d fields but cve index is %d", n, cfg.cve+1)
}
return nil
}