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// Command-line interface
package cmd
import (
"compress/gzip"
"encoding/json"
"encoding/xml"
"github.com/pablotron/cvez/cisa"
"github.com/pablotron/cvez/cpedict"
"github.com/pablotron/cvez/cpematch"
"github.com/pablotron/cvez/datadir"
"github.com/pablotron/cvez/dbstore"
"github.com/pablotron/cvez/nvdmirror"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
nvd_feed "github.com/pablotron/cvez/feed"
"os"
"path/filepath"
"strings"
"time"
)
// Build query string.
func getSearchQuery(args []string) string {
r := make([]string, len(args))
for i, v := range(args) {
r[i] = "\"" + strings.ReplaceAll(strings.ToLower(v), "\"", "\"\"") + "\""
}
return strings.Join(r, " AND ")
}
// Get database store.
func getDb() dbstore.DbStore {
// build database path
dbPath, err := datadir.Join("cvez.db")
if err != nil {
log.Error().Err(err).Msg("Join")
os.Exit(-1)
}
// open database
db, err := dbstore.Open(dbPath)
if err != nil {
log.Error().Err(err).Msg("Open")
os.Exit(-1)
}
return db
}
// Get cache and cache directory path.
func getCache() (nvdmirror.JsonCache, string) {
// get path to cache directory
dir, err := datadir.CacheDir()
if err != nil {
log.Error().Err(err).Msg("CacheDir")
os.Exit(-1)
}
// build cache file path
cachePath := filepath.Join(dir, "cache.json.gz")
// create cache
cache, err := nvdmirror.NewJsonCache(cachePath)
if err != nil {
log.Error().Err(err).Msg("NewJsonCache")
os.Exit(-1)
}
// return cache
return cache, dir
}
// JSON encode data and write it to standard output
func jsonEncode(data interface{}) {
// search for CVEs, write result
e := json.NewEncoder(os.Stdout)
if err := e.Encode(data); err != nil {
log.Error().Err(err).Msg("Encode")
os.Exit(-1)
}
}
func init() {
// set global logging options
zerolog.TimeFieldFormat = time.RFC3339
zerolog.SetGlobalLevel(zerolog.InfoLevel)
rootCmd.AddCommand(searchCmd)
rootCmd.AddCommand(cisaSearchCmd)
rootCmd.AddCommand(cvssCmd)
rootCmd.AddCommand(updateCmd)
}
// read gzipped file, pass reader to callback.
func gzOpen(path string, fn func(*gzip.Reader)) {
f, err := os.Open(path)
if err != nil {
log.Error().Err(err).Msg("Open")
os.Exit(-1)
}
defer f.Close()
// create gzip reader
r, err := gzip.NewReader(f)
if err != nil {
log.Error().Err(err).Msg("NewReader")
os.Exit(-1)
}
fn(r)
}
// read gzipped json, pass decoder to callback
func jsonGzOpen(path string, fn func(*json.Decoder)) {
gzOpen(path, func(r *gzip.Reader) {
fn(json.NewDecoder(r))
})
}
// read gzipped xml, pass decoder to callback
func xmlGzOpen(path string, fn func(*xml.Decoder)) {
gzOpen(path, func(r *gzip.Reader) {
fn(xml.NewDecoder(r))
})
}
// Read feed from file.
func getFeed(path string) nvd_feed.Feed {
var feed nvd_feed.Feed
jsonGzOpen(path, func(d *json.Decoder) {
if err := d.Decode(&feed); err != nil {
log.Error().Err(err).Msg("Decode")
os.Exit(-1)
}
})
// return feed
return feed
}
// Load CVE feeds in parallel.
func getFeeds(cacheDir string, updates []nvdmirror.Update) []nvd_feed.Feed {
numFeeds := 0
// load feeds in parallel
ch := make(chan nvd_feed.Feed)
for _, row := range(updates) {
if row.Type == nvdmirror.UpdateCveYear {
numFeeds += 1
go func(path string) {
ch <- getFeed(path)
}(filepath.Join(cacheDir, row.Path))
}
}
// collect feeds
feeds := make([]nvd_feed.Feed, numFeeds)
for i := 0; i < numFeeds; i++ {
feeds[i] = <-ch
}
return feeds
}
// Read cpe matches from file.
func getCpeMatches(path string) cpematch.Matches {
var matches cpematch.Matches
jsonGzOpen(path, func(d *json.Decoder) {
if err := d.Decode(&matches); err != nil {
log.Error().Err(err).Msg("Decode")
os.Exit(-1)
}
})
// return matches
return matches
}
// Read cpe dictionary from file.
func getCpeDict(path string) cpedict.Dictionary {
var dict cpedict.Dictionary
xmlGzOpen(path, func(d *xml.Decoder) {
if err := d.Decode(&dict); err != nil {
log.Error().Err(err).Msg("Decode")
os.Exit(-1)
}
})
// return dictionary
return dict
}
// Read cisa catalog from file.
func getCisaCatalog(path string) cisa.Catalog {
f, err := os.Open(path)
if err != nil {
log.Error().Err(err).Msg("Open")
os.Exit(-1)
}
defer f.Close()
// create decoder, decode catalog
var cat cisa.Catalog
d := json.NewDecoder(f)
if err = d.Decode(&cat); err != nil {
log.Error().Err(err).Msg("Decode")
os.Exit(-1)
}
// return catalog
return cat
}
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