add wyze support

2026-01-01 05:24:45 +01:00
parent 212def9ceb
commit a42ab88dbd
21 changed files with 5371 additions and 1 deletions
@@ -0,0 +1,143 @@
+package crypto
+
+import (
+	"bytes"
+	"crypto/rand"
+	"encoding/binary"
+	"math/bits"
+)
+
+const charlie = "Charlie is the designer of P2P!!"
+
+func TransCodePartial(src []byte) []byte {
+	n := len(src)
+	tmp := make([]byte, n)
+	dst := bytes.Clone(src)
+	src16, tmp16, dst16 := src, tmp, dst
+
+	for ; n >= 16; n -= 16 {
+		for i := 0; i < 16; i += 4 {
+			x := binary.LittleEndian.Uint32(src16[i:])
+			binary.LittleEndian.PutUint32(tmp16[i:], bits.RotateLeft32(x, -i-1))
+		}
+		for i := range 16 {
+			dst16[i] = tmp16[i] ^ charlie[i]
+		}
+		swap(dst16, tmp16, 16)
+		for i := 0; i < 16; i += 4 {
+			x := binary.LittleEndian.Uint32(tmp16[i:])
+			binary.LittleEndian.PutUint32(dst16[i:], bits.RotateLeft32(x, -i-3))
+		}
+		tmp16, dst16, src16 = tmp16[16:], dst16[16:], src16[16:]
+	}
+
+	for i := 0; i < n; i++ {
+		tmp16[i] = src16[i] ^ charlie[i]
+	}
+	swap(tmp16, dst16, n)
+	return dst
+}
+
+func ReverseTransCodePartial(src []byte) []byte {
+	n := len(src)
+	tmp := make([]byte, n)
+	dst := bytes.Clone(src)
+	src16, tmp16, dst16 := src, tmp, dst
+
+	for ; n >= 16; n -= 16 {
+		for i := 0; i < 16; i += 4 {
+			x := binary.LittleEndian.Uint32(src16[i:])
+			binary.LittleEndian.PutUint32(tmp16[i:], bits.RotateLeft32(x, i+3))
+		}
+		swap(tmp16, dst16, 16)
+		for i := range 16 {
+			tmp16[i] = dst16[i] ^ charlie[i]
+		}
+		for i := 0; i < 16; i += 4 {
+			x := binary.LittleEndian.Uint32(tmp16[i:])
+			binary.LittleEndian.PutUint32(dst16[i:], bits.RotateLeft32(x, i+1))
+		}
+		tmp16, dst16, src16 = tmp16[16:], dst16[16:], src16[16:]
+	}
+
+	swap(src16, tmp16, n)
+	for i := 0; i < n; i++ {
+		dst16[i] = tmp16[i] ^ charlie[i]
+	}
+	return dst
+}
+
+func TransCodeBlob(src []byte) []byte {
+	if len(src) < 16 {
+		return TransCodePartial(src)
+	}
+
+	dst := make([]byte, len(src))
+	header := TransCodePartial(src[:16])
+	copy(dst, header)
+
+	if len(src) > 16 {
+		if src[3]&1 != 0 { // Partial encryption
+			remaining := len(src) - 16
+			encryptLen := min(remaining, 48)
+			if encryptLen > 0 {
+				encrypted := TransCodePartial(src[16 : 16+encryptLen])
+				copy(dst[16:], encrypted)
+			}
+			if remaining > 48 {
+				copy(dst[64:], src[64:])
+			}
+		} else { // Full encryption
+			encrypted := TransCodePartial(src[16:])
+			copy(dst[16:], encrypted)
+		}
+	}
+	return dst
+}
+
+func ReverseTransCodeBlob(src []byte) []byte {
+	if len(src) < 16 {
+		return ReverseTransCodePartial(src)
+	}
+
+	dst := make([]byte, len(src))
+	header := ReverseTransCodePartial(src[:16])
+	copy(dst, header)
+
+	if len(src) > 16 {
+		if dst[3]&1 != 0 { // Partial encryption (check decrypted header)
+			remaining := len(src) - 16
+			decryptLen := min(remaining, 48)
+			if decryptLen > 0 {
+				decrypted := ReverseTransCodePartial(src[16 : 16+decryptLen])
+				copy(dst[16:], decrypted)
+			}
+			if remaining > 48 {
+				copy(dst[64:], src[64:])
+			}
+		} else { // Full decryption
+			decrypted := ReverseTransCodePartial(src[16:])
+			copy(dst[16:], decrypted)
+		}
+	}
+	return dst
+}
+
+func RandRead(b []byte) {
+	_, _ = rand.Read(b)
+}
+
+func swap(src, dst []byte, n int) {
+	switch n {
+	case 8:
+		dst[0], dst[1], dst[2], dst[3] = src[7], src[4], src[3], src[2]
+		dst[4], dst[5], dst[6], dst[7] = src[1], src[6], src[5], src[0]
+	case 16:
+		dst[0], dst[1], dst[2], dst[3] = src[11], src[9], src[8], src[15]
+		dst[4], dst[5], dst[6], dst[7] = src[13], src[10], src[12], src[14]
+		dst[8], dst[9], dst[10], dst[11] = src[2], src[1], src[5], src[0]
+		dst[12], dst[13], dst[14], dst[15] = src[6], src[4], src[7], src[3]
+	default:
+		copy(dst, src[:n])
+	}
+}