install go2rtc on bob

This commit is contained in:
2026-04-04 19:36:14 +02:00
parent f0b56e63d1
commit ccf88187b8
537 changed files with 69213 additions and 0 deletions
+279
View File
@@ -0,0 +1,279 @@
package tutk
import (
"encoding/binary"
"math/bits"
)
// I'd like to say hello to Charlie. Your name is forever etched into the history of streaming software.
const charlie = "Charlie is the designer of P2P!!"
func ReverseTransCodePartial(dst, src []byte) []byte {
n := len(src)
tmp := make([]byte, n)
if len(dst) < n {
dst = make([]byte, n)
}
src16 := src
tmp16 := tmp
dst16 := 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(dst16, tmp16, 16)
for i := 0; i != 16; i++ {
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 = tmp16[16:]
dst16 = dst16[16:]
src16 = src16[16:]
}
swap(tmp16, src16, n)
for i := 0; i < n; i++ {
dst16[i] = tmp16[i] ^ charlie[i]
}
return dst
}
func ReverseTransCodeBlob(src []byte) []byte {
if len(src) < 16 {
return ReverseTransCodePartial(nil, src)
}
dst := make([]byte, len(src))
header := ReverseTransCodePartial(nil, 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(nil, src[16:16+decryptLen])
copy(dst[16:], decrypted)
}
if remaining > 48 {
copy(dst[64:], src[64:])
}
} else { // Full decryption
decrypted := ReverseTransCodePartial(nil, src[16:])
copy(dst[16:], decrypted)
}
}
return dst
}
func TransCodePartial(dst, src []byte) []byte {
n := len(src)
tmp := make([]byte, n)
if len(dst) < n {
dst = make([]byte, n)
}
src16 := src
tmp16 := tmp
dst16 := 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 := 0; i != 16; i++ {
dst16[i] = tmp16[i] ^ charlie[i]
}
swap(tmp16, dst16, 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 = tmp16[16:]
dst16 = dst16[16:]
src16 = src16[16:]
}
for i := 0; i < n; i++ {
tmp16[i] = src16[i] ^ charlie[i]
}
swap(dst16, tmp16, n)
return dst
}
func TransCodeBlob(src []byte) []byte {
if len(src) < 16 {
return TransCodePartial(nil, src)
}
dst := make([]byte, len(src))
header := TransCodePartial(nil, 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(nil, src[16:16+encryptLen])
copy(dst[16:], encrypted)
}
if remaining > 48 {
copy(dst[64:], src[64:])
}
} else { // Full encryption
encrypted := TransCodePartial(nil, src[16:])
copy(dst[16:], encrypted)
}
}
return dst
}
func swap(dst, src []byte, n int) {
switch n {
case 2:
_, _ = src[1], dst[1]
dst[0] = src[1]
dst[1] = src[0]
return
case 4:
_, _ = src[3], dst[3]
dst[0] = src[2]
dst[1] = src[3]
dst[2] = src[0]
dst[3] = src[1]
return
case 8:
_, _ = src[7], dst[7]
dst[0] = src[7]
dst[1] = src[4]
dst[2] = src[3]
dst[3] = src[2]
dst[4] = src[1]
dst[5] = src[6]
dst[6] = src[5]
dst[7] = src[0]
return
case 16:
_, _ = src[15], dst[15]
dst[0] = src[11]
dst[1] = src[9]
dst[2] = src[8]
dst[3] = src[15]
dst[4] = src[13]
dst[5] = src[10]
dst[6] = src[12]
dst[7] = src[14]
dst[8] = src[2]
dst[9] = src[1]
dst[10] = src[5]
dst[11] = src[0]
dst[12] = src[6]
dst[13] = src[4]
dst[14] = src[7]
dst[15] = src[3]
return
}
copy(dst, src[:n])
}
const delta = 0x9e3779b9
func XXTEADecrypt(dst, src, key []byte) {
const n = int8(4) // support only 16 bytes src
var w, k [n]uint32
for i := int8(0); i < n; i++ {
w[i] = binary.LittleEndian.Uint32(src)
k[i] = binary.LittleEndian.Uint32(key)
src = src[4:]
key = key[4:]
}
rounds := 52/n + 6
sum := uint32(rounds) * delta
for ; rounds > 0; rounds-- {
w0 := w[0]
i2 := int8((sum >> 2) & 3)
for i := n - 1; i >= 0; i-- {
wi := w[(i-1)&3]
ki := k[i^i2]
t1 := (w0 ^ sum) + (wi ^ ki)
t2 := (wi >> 5) ^ (w0 << 2)
t3 := (w0 >> 3) ^ (wi << 4)
w[i] -= t1 ^ (t2 + t3)
w0 = w[i]
}
sum -= delta
}
for _, i := range w {
binary.LittleEndian.PutUint32(dst, i)
dst = dst[4:]
}
}
func XXTEADecryptVar(data, key []byte) []byte {
if len(data) < 8 || len(key) < 16 {
return nil
}
k := make([]uint32, 4)
for i := range 4 {
k[i] = binary.LittleEndian.Uint32(key[i*4:])
}
n := max(len(data)/4, 2)
v := make([]uint32, n)
for i := 0; i < len(data)/4; i++ {
v[i] = binary.LittleEndian.Uint32(data[i*4:])
}
rounds := 6 + 52/n
sum := uint32(rounds) * delta
y := v[0]
for rounds > 0 {
e := (sum >> 2) & 3
for p := n - 1; p > 0; p-- {
z := v[p-1]
v[p] -= xxteaMX(sum, y, z, p, e, k)
y = v[p]
}
z := v[n-1]
v[0] -= xxteaMX(sum, y, z, 0, e, k)
y = v[0]
sum -= delta
rounds--
}
result := make([]byte, n*4)
for i := range n {
binary.LittleEndian.PutUint32(result[i*4:], v[i])
}
return result[:len(data)]
}
func xxteaMX(sum, y, z uint32, p int, e uint32, k []uint32) uint32 {
return ((z>>5 ^ y<<2) + (y>>3 ^ z<<4)) ^ ((sum ^ y) + (k[(p&3)^int(e)] ^ z))
}