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main.go
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main.go
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package main
import (
"crypto/rsa"
"crypto/x509"
"database/sql"
"flag"
"fmt"
"log"
"sync"
"time"
_ "github.com/go-sql-driver/mysql"
"github.com/letsencrypt/boulder/cmd"
"github.com/letsencrypt/boulder/goodkey"
blog "github.com/letsencrypt/boulder/log"
)
type certInfo struct {
serial string
der []byte
}
var limit = 1000
func getCerts(work chan certInfo, moreThan, lessThan time.Time, db *sql.DB) {
query := "SELECT serial, der FROM certificates WHERE issued >= ? and issued < ? ORDER BY issued LIMIT ? OFFSET ?"
i := 0
for {
rows, err := db.Query(query, moreThan, lessThan, limit, i)
if err != nil && err != sql.ErrNoRows {
cmd.FailOnError(err, "db.Query failed")
} else if err == sql.ErrNoRows {
break
}
defer func() { _ = rows.Close() }()
prev := i
for rows.Next() {
i++
var c certInfo
if err := rows.Scan(&c.serial, &c.der); err != nil {
cmd.FailOnError(err, "rows.Scan failed")
}
work <- c
}
if i == prev {
break
}
}
close(work)
}
func doWork(work chan certInfo, parallelism int, wkl *goodkey.WeakRSAKeys, log blog.Logger) {
wg := sync.WaitGroup{}
for i := 0; i < parallelism; i++ {
wg.Add(1)
go func() {
defer wg.Done()
for ci := range work {
cert, err := x509.ParseCertificate(ci.der)
cmd.FailOnError(err, "x509.ParseCertificate failed")
if rk, ok := cert.PublicKey.(*rsa.PublicKey); ok && wkl.Known(rk) {
log.Info(fmt.Sprintf("cert contains weak key: %s", ci.serial))
}
}
}()
}
wg.Wait()
}
type config struct {
cmd.SyslogConfig
cmd.DBConfig
WeakKeyFile string
Parallelism uint
IssuedMoreThan string
IssuedLessThan string
BufferSize uint
BatchSize uint
}
func main() {
configFile := flag.String("config", "", "Path to configuration file")
flag.Parse()
var c config
err := cmd.ReadConfigFile(*configFile, &c)
cmd.FailOnError(err, fmt.Sprintf("Failed to read and parse configuration file %q", *configFile))
if c.Parallelism == 0 {
log.Fatal("parallelism must be > 0")
}
bufferSize := 5000
if c.BufferSize > 0 {
bufferSize = int(c.BatchSize)
}
if c.BatchSize > 0 {
limit = int(c.BatchSize)
}
_, log := cmd.StatsAndLogging(c.SyslogConfig)
moreThan, err := time.Parse(time.RFC3339, c.IssuedMoreThan)
cmd.FailOnError(err, fmt.Sprintf("failed to parse issuedMoreThan %q", c.IssuedMoreThan))
lessThan, err := time.Parse(time.RFC3339, c.IssuedLessThan)
cmd.FailOnError(err, fmt.Sprintf("failed to parse issuedLessThan %q", c.IssuedLessThan))
wkl, err := goodkey.LoadWeakRSASuffixes(c.WeakKeyFile)
cmd.FailOnError(err, fmt.Sprintf("failed to load weak key list %q", c.WeakKeyFile))
uri, err := c.DBConfig.URL()
cmd.FailOnError(err, "Failed to load DB URI")
db, err := sql.Open("mysql", uri)
cmd.FailOnError(err, "failed to connect to DB")
work := make(chan certInfo, bufferSize)
go getCerts(work, moreThan, lessThan, db)
doWork(work, int(c.Parallelism), wkl, log)
}