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).
47 lines
774 B
Go
47 lines
774 B
Go
package device
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import (
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"bytes"
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"encoding/hex"
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"errors"
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"strings"
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)
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func newBytesObf(val string) (obf, error) {
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val = strings.TrimPrefix(val, "0x")
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if len(val) == 0 {
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return nil, errors.New("empty argument")
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}
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if len(val)%2 != 0 {
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return nil, errors.New("odd amount of symbols")
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}
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bytes, err := hex.DecodeString(val)
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if err != nil {
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return nil, err
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}
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return &bytesObf{data: bytes}, nil
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}
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type bytesObf struct {
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data []byte
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}
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func (o *bytesObf) Obfuscate(dst, src []byte) {
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copy(dst, o.data)
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}
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func (o *bytesObf) Deobfuscate(dst, src []byte) bool {
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return bytes.Equal(o.data, src[:o.ObfuscatedLen(0)])
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}
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func (o *bytesObf) ObfuscatedLen(srcLen int) int {
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return len(o.data)
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}
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func (o *bytesObf) DeobfuscatedLen(srcLen int) int {
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return 0
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}
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