diff options
| -rw-r--r-- | device/peer.go | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/device/peer.go b/device/peer.go index d2f6d07..c8b825d 100644 --- a/device/peer.go +++ b/device/peer.go @@ -7,7 +7,6 @@ package device import ( "container/list" - "encoding/base64" "errors" "sync" "sync/atomic" @@ -150,19 +149,22 @@ func (peer *Peer) String() string { // return fmt.Sprintf("peer(%s)", abbreviatedKey) // // except that it is considerably more efficient. - const prefix = "peer(" - b := make([]byte, len(prefix)+44) - copy(b, prefix) - r := b[len(prefix):] - base64.StdEncoding.Encode(r, peer.handshake.remoteStatic[:]) - r = r[4:] - copy(r, "…") - r = r[len("…"):] - copy(r, b[len(prefix)+39:len(prefix)+43]) - r = r[4:] - r[0] = ')' - r = r[1:] - return string(b[:len(b)-len(r)]) + src := peer.handshake.remoteStatic + b64 := func(input byte) byte { + return input + 'A' + byte(((25-int(input))>>8)&6) - byte(((51-int(input))>>8)&75) - byte(((61-int(input))>>8)&15) + byte(((62-int(input))>>8)&3) + } + b := []byte("peer(____…____)") + const first = len("peer(") + const second = len("peer(____…") + b[first+0] = b64((src[0] >> 2) & 63) + b[first+1] = b64(((src[0] << 4) | (src[1] >> 4)) & 63) + b[first+2] = b64(((src[1] << 2) | (src[2] >> 6)) & 63) + b[first+3] = b64(src[2] & 63) + b[second+0] = b64(src[29] & 63) + b[second+1] = b64((src[30] >> 2) & 63) + b[second+2] = b64(((src[30] << 4) | (src[31] >> 4)) & 63) + b[second+3] = b64((src[31] << 2) & 63) + return string(b) } func (peer *Peer) Start() { |