forked from TrueCloudLab/lego
42941ccea6
- Packages - Isolate code used by the CLI into the package `cmd` - (experimental) Add e2e tests for HTTP01, TLS-ALPN-01 and DNS-01, use [Pebble](https://github.com/letsencrypt/pebble) and [challtestsrv](https://github.com/letsencrypt/boulder/tree/master/test/challtestsrv) - Support non-ascii domain name (punnycode) - Check all challenges in a predictable order - No more global exported variables - Archive revoked certificates - Fixes revocation for subdomains and non-ascii domains - Disable pending authorizations - use pointer for RemoteError/ProblemDetails - Poll authz URL instead of challenge URL - The ability for a DNS provider to solve the challenge sequentially - Check all nameservers in a predictable order - Option to disable the complete propagation Requirement - CLI, support for renew with CSR - CLI, add SAN on renew - Add command to list certificates. - Logs every iteration of waiting for the propagation - update DNSimple client - update github.com/miekg/dns
108 lines
2.6 KiB
Go
108 lines
2.6 KiB
Go
package dns
|
|
|
|
import (
|
|
"crypto/sha1"
|
|
"hash"
|
|
"strings"
|
|
)
|
|
|
|
type saltWireFmt struct {
|
|
Salt string `dns:"size-hex"`
|
|
}
|
|
|
|
// HashName hashes a string (label) according to RFC 5155. It returns the hashed string in uppercase.
|
|
func HashName(label string, ha uint8, iter uint16, salt string) string {
|
|
saltwire := new(saltWireFmt)
|
|
saltwire.Salt = salt
|
|
wire := make([]byte, DefaultMsgSize)
|
|
n, err := packSaltWire(saltwire, wire)
|
|
if err != nil {
|
|
return ""
|
|
}
|
|
wire = wire[:n]
|
|
name := make([]byte, 255)
|
|
off, err := PackDomainName(strings.ToLower(label), name, 0, nil, false)
|
|
if err != nil {
|
|
return ""
|
|
}
|
|
name = name[:off]
|
|
var s hash.Hash
|
|
switch ha {
|
|
case SHA1:
|
|
s = sha1.New()
|
|
default:
|
|
return ""
|
|
}
|
|
|
|
// k = 0
|
|
s.Write(name)
|
|
s.Write(wire)
|
|
nsec3 := s.Sum(nil)
|
|
// k > 0
|
|
for k := uint16(0); k < iter; k++ {
|
|
s.Reset()
|
|
s.Write(nsec3)
|
|
s.Write(wire)
|
|
nsec3 = s.Sum(nsec3[:0])
|
|
}
|
|
return toBase32(nsec3)
|
|
}
|
|
|
|
// Cover returns true if a name is covered by the NSEC3 record
|
|
func (rr *NSEC3) Cover(name string) bool {
|
|
nameHash := HashName(name, rr.Hash, rr.Iterations, rr.Salt)
|
|
owner := strings.ToUpper(rr.Hdr.Name)
|
|
labelIndices := Split(owner)
|
|
if len(labelIndices) < 2 {
|
|
return false
|
|
}
|
|
ownerHash := owner[:labelIndices[1]-1]
|
|
ownerZone := owner[labelIndices[1]:]
|
|
if !IsSubDomain(ownerZone, strings.ToUpper(name)) { // name is outside owner zone
|
|
return false
|
|
}
|
|
|
|
nextHash := rr.NextDomain
|
|
|
|
// if empty interval found, try cover wildcard hashes so nameHash shouldn't match with ownerHash
|
|
if ownerHash == nextHash && nameHash != ownerHash { // empty interval
|
|
return true
|
|
}
|
|
if ownerHash > nextHash { // end of zone
|
|
if nameHash > ownerHash { // covered since there is nothing after ownerHash
|
|
return true
|
|
}
|
|
return nameHash < nextHash // if nameHash is before beginning of zone it is covered
|
|
}
|
|
if nameHash < ownerHash { // nameHash is before ownerHash, not covered
|
|
return false
|
|
}
|
|
return nameHash < nextHash // if nameHash is before nextHash is it covered (between ownerHash and nextHash)
|
|
}
|
|
|
|
// Match returns true if a name matches the NSEC3 record
|
|
func (rr *NSEC3) Match(name string) bool {
|
|
nameHash := HashName(name, rr.Hash, rr.Iterations, rr.Salt)
|
|
owner := strings.ToUpper(rr.Hdr.Name)
|
|
labelIndices := Split(owner)
|
|
if len(labelIndices) < 2 {
|
|
return false
|
|
}
|
|
ownerHash := owner[:labelIndices[1]-1]
|
|
ownerZone := owner[labelIndices[1]:]
|
|
if !IsSubDomain(ownerZone, strings.ToUpper(name)) { // name is outside owner zone
|
|
return false
|
|
}
|
|
if ownerHash == nameHash {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func packSaltWire(sw *saltWireFmt, msg []byte) (int, error) {
|
|
off, err := packStringHex(sw.Salt, msg, 0)
|
|
if err != nil {
|
|
return off, err
|
|
}
|
|
return off, nil
|
|
}
|