func (hq *HashQuery) Parse() error {
// Require HTTP POST
if hq.Method != "POST" {
return ErrorInvalidMethod(hq.Method)
}
hq.responseChan = make(ResponseChan)
var body *bytes.Buffer
{
defer hq.Body.Close()
buf, err := ioutil.ReadAll(hq.Body)
if err != nil {
return err
}
body = bytes.NewBuffer(buf)
}
// Parse hashquery POST data
n, err := recon.ReadInt(body)
if err != nil {
return err
}
hq.Digests = make([]string, n)
for i := 0; i < n; i++ {
hashlen, err := recon.ReadInt(body)
if err != nil {
return err
}
hash := make([]byte, hashlen)
_, err = body.Read(hash)
if err != nil {
return err
}
hq.Digests[i] = hex.EncodeToString(hash)
}
return nil
}
func (r *SksPeer) requestChunk(rcvr *recon.Recover, chunk []*Zp) (err error) {
var remoteAddr string
remoteAddr, err = rcvr.HkpAddr()
if err != nil {
return err
}
// Make an sks hashquery request
hqBuf := bytes.NewBuffer(nil)
err = recon.WriteInt(hqBuf, len(chunk))
if err != nil {
return err
}
for _, z := range chunk {
zb := z.Bytes()
zb = recon.PadSksElement(zb)
// Hashquery elements are 16 bytes (length_of(P_SKS)-1)
zb = zb[:len(zb)-1]
err = recon.WriteInt(hqBuf, len(zb))
if err != nil {
return err
}
_, err = hqBuf.Write(zb)
if err != nil {
return err
}
}
resp, err := http.Post(fmt.Sprintf("http://%s/pks/hashquery", remoteAddr),
"sks/hashquery", bytes.NewReader(hqBuf.Bytes()))
if err != nil {
return err
}
// Store response in memory. Connection may timeout if we
// read directly from it while loading.
var body *bytes.Buffer
{
defer resp.Body.Close()
bodyBuf, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
body = bytes.NewBuffer(bodyBuf)
}
var nkeys, keyLen int
nkeys, err = recon.ReadInt(body)
if err != nil {
return err
}
log.Println("Response from server:", nkeys, " keys found")
for i := 0; i < nkeys; i++ {
keyLen, err = recon.ReadInt(body)
if err != nil {
return err
}
keyBuf := bytes.NewBuffer(nil)
_, err = io.CopyN(keyBuf, body, int64(keyLen))
if err != nil {
return err
}
log.Println("Key#", i+1, ":", keyLen, "bytes")
// Merge locally
recoverKey := RecoverKey{
Keytext: keyBuf.Bytes(),
Source: rcvr.RemoteAddr.String(),
response: make(chan hkp.Response)}
go func() {
r.RecoverKey <- recoverKey
}()
resp := <-recoverKey.response
if resp, ok := resp.(*RecoverKeyResponse); ok {
if resp.Error() != nil {
log.Println("Error adding key:", resp.Error())
}
} else if resp != nil {
log.Println("Error adding key:", resp.Error())
} else {
log.Println("Empty response from recovering key!")
}
}
// Read last two bytes (CRLF, why?), or SKS will complain.
body.Read(make([]byte, 2))
return
}