831d483366
Rebase of the AWG obf graft (wase5feca7on v0.0.3) onto v0.0.5 (2c27bbf4f9, 'Add L3 forwarding support'). 15 of 16 graft files applied clean via 3-way; only send.go conflicted, on a single line (upstream queuedOutboundPackets backpressure decrement vs a graft blank line — took upstream). Key invariant preserved: MessageEncapsulatingTransportSize=0 (graft zeroes the sagernet encapsulating headroom; AWG obfuscation composes the prefix itself via SendBuffers, not Bind.Send prepend). Upstream's InputPacket/InputPackets and the new size-based outbound buffer pool (GetOutboundBuffer/PutOutboundBuffer) are taken verbatim; the graft's RoutineEncryption (header at buffer start) and transport-padding shift in RoutineSequentialSender re-woven around them. Builds clean on linux/android/windows/darwin (device/conn/tun).
48 lines
762 B
Go
48 lines
762 B
Go
package device
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import (
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"crypto/rand"
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"strconv"
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"unicode"
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)
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const digits10 = "0123456789"
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func newRandDigitsObf(val string) (obf, error) {
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length, err := strconv.Atoi(val)
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if err != nil {
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return nil, err
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}
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return &randDigitObf{
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length: length,
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}, nil
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}
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type randDigitObf struct {
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length int
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}
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func (o *randDigitObf) Obfuscate(dst, src []byte) {
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rand.Read(dst[:o.length])
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for i := range dst[:o.length] {
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dst[i] = digits10[dst[i]%10]
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}
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}
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func (o *randDigitObf) Deobfuscate(dst, src []byte) bool {
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for _, b := range src[:o.length] {
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if !unicode.IsDigit(rune(b)) {
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return false
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}
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}
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return true
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}
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func (o *randDigitObf) ObfuscatedLen(n int) int {
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return o.length
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}
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func (o *randDigitObf) DeobfuscatedLen(n int) int {
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return 0
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}
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