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Update github.com/miekg/dns to pick up fix for CVE-2019-19794.

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I noticed this was out of date using 'snyk test' on the main repository.
This commit is contained in:
Dan Lorenc
2020-12-19 15:29:30 -06:00
parent b749a3a421
commit f273212c0b
47 changed files with 2989 additions and 1939 deletions
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129
vendor/github.com/miekg/dns/msg.go generated vendored
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@@ -11,14 +11,12 @@ package dns
//go:generate go run msg_generate.go
import (
crand "crypto/rand"
"crypto/rand"
"encoding/binary"
"fmt"
"math/big"
"math/rand"
"strconv"
"strings"
"sync"
)
const (
@@ -73,53 +71,23 @@ var (
ErrTime error = &Error{err: "bad time"} // ErrTime indicates a timing error in TSIG authentication.
)
// Id by default, returns a 16 bits random number to be used as a
// message id. The random provided should be good enough. This being a
// variable the function can be reassigned to a custom function.
// For instance, to make it return a static value:
// Id by default returns a 16-bit random number to be used as a message id. The
// number is drawn from a cryptographically secure random number generator.
// This being a variable the function can be reassigned to a custom function.
// For instance, to make it return a static value for testing:
//
// dns.Id = func() uint16 { return 3 }
var Id = id
var (
idLock sync.Mutex
idRand *rand.Rand
)
// id returns a 16 bits random number to be used as a
// message id. The random provided should be good enough.
func id() uint16 {
idLock.Lock()
if idRand == nil {
// This (partially) works around
// https://github.com/golang/go/issues/11833 by only
// seeding idRand upon the first call to id.
var seed int64
var buf [8]byte
if _, err := crand.Read(buf[:]); err == nil {
seed = int64(binary.LittleEndian.Uint64(buf[:]))
} else {
seed = rand.Int63()
}
idRand = rand.New(rand.NewSource(seed))
var output uint16
err := binary.Read(rand.Reader, binary.BigEndian, &output)
if err != nil {
panic("dns: reading random id failed: " + err.Error())
}
// The call to idRand.Uint32 must be within the
// mutex lock because *rand.Rand is not safe for
// concurrent use.
//
// There is no added performance overhead to calling
// idRand.Uint32 inside a mutex lock over just
// calling rand.Uint32 as the global math/rand rng
// is internally protected by a sync.Mutex.
id := uint16(idRand.Uint32())
idLock.Unlock()
return id
return output
}
// MsgHdr is a a manually-unpacked version of (id, bits).
@@ -429,18 +397,13 @@ Loop:
if budget <= 0 {
return "", lenmsg, ErrLongDomain
}
for j := off; j < off+c; j++ {
switch b := msg[j]; b {
case '.', '(', ')', ';', ' ', '@':
fallthrough
case '"', '\\':
for _, b := range msg[off : off+c] {
if isDomainNameLabelSpecial(b) {
s = append(s, '\\', b)
default:
if b < ' ' || b > '~' { // unprintable, use \DDD
s = append(s, escapeByte(b)...)
} else {
s = append(s, b)
}
} else if b < ' ' || b > '~' {
s = append(s, escapeByte(b)...)
} else {
s = append(s, b)
}
}
s = append(s, '.')
@@ -489,11 +452,11 @@ func packTxt(txt []string, msg []byte, offset int, tmp []byte) (int, error) {
return offset, nil
}
var err error
for i := range txt {
if len(txt[i]) > len(tmp) {
for _, s := range txt {
if len(s) > len(tmp) {
return offset, ErrBuf
}
offset, err = packTxtString(txt[i], msg, offset, tmp)
offset, err = packTxtString(s, msg, offset, tmp)
if err != nil {
return offset, err
}
@@ -693,7 +656,6 @@ func unpackRRslice(l int, msg []byte, off int) (dst1 []RR, off1 int, err error)
}
// If offset does not increase anymore, l is a lie
if off1 == off {
l = i
break
}
dst = append(dst, r)
@@ -934,31 +896,31 @@ func (dns *Msg) String() string {
s += "ADDITIONAL: " + strconv.Itoa(len(dns.Extra)) + "\n"
if len(dns.Question) > 0 {
s += "\n;; QUESTION SECTION:\n"
for i := 0; i < len(dns.Question); i++ {
s += dns.Question[i].String() + "\n"
for _, r := range dns.Question {
s += r.String() + "\n"
}
}
if len(dns.Answer) > 0 {
s += "\n;; ANSWER SECTION:\n"
for i := 0; i < len(dns.Answer); i++ {
if dns.Answer[i] != nil {
s += dns.Answer[i].String() + "\n"
for _, r := range dns.Answer {
if r != nil {
s += r.String() + "\n"
}
}
}
if len(dns.Ns) > 0 {
s += "\n;; AUTHORITY SECTION:\n"
for i := 0; i < len(dns.Ns); i++ {
if dns.Ns[i] != nil {
s += dns.Ns[i].String() + "\n"
for _, r := range dns.Ns {
if r != nil {
s += r.String() + "\n"
}
}
}
if len(dns.Extra) > 0 {
s += "\n;; ADDITIONAL SECTION:\n"
for i := 0; i < len(dns.Extra); i++ {
if dns.Extra[i] != nil {
s += dns.Extra[i].String() + "\n"
for _, r := range dns.Extra {
if r != nil {
s += r.String() + "\n"
}
}
}
@@ -1091,33 +1053,20 @@ func (dns *Msg) CopyTo(r1 *Msg) *Msg {
}
rrArr := make([]RR, len(dns.Answer)+len(dns.Ns)+len(dns.Extra))
var rri int
r1.Answer, rrArr = rrArr[:0:len(dns.Answer)], rrArr[len(dns.Answer):]
r1.Ns, rrArr = rrArr[:0:len(dns.Ns)], rrArr[len(dns.Ns):]
r1.Extra = rrArr[:0:len(dns.Extra)]
if len(dns.Answer) > 0 {
rrbegin := rri
for i := 0; i < len(dns.Answer); i++ {
rrArr[rri] = dns.Answer[i].copy()
rri++
}
r1.Answer = rrArr[rrbegin:rri:rri]
for _, r := range dns.Answer {
r1.Answer = append(r1.Answer, r.copy())
}
if len(dns.Ns) > 0 {
rrbegin := rri
for i := 0; i < len(dns.Ns); i++ {
rrArr[rri] = dns.Ns[i].copy()
rri++
}
r1.Ns = rrArr[rrbegin:rri:rri]
for _, r := range dns.Ns {
r1.Ns = append(r1.Ns, r.copy())
}
if len(dns.Extra) > 0 {
rrbegin := rri
for i := 0; i < len(dns.Extra); i++ {
rrArr[rri] = dns.Extra[i].copy()
rri++
}
r1.Extra = rrArr[rrbegin:rri:rri]
for _, r := range dns.Extra {
r1.Extra = append(r1.Extra, r.copy())
}
return r1