mirror of
https://github.com/XTLS/Xray-core.git
synced 2025-08-23 06:58:37 +00:00
52 lines
910 B
Go
52 lines
910 B
Go
package encryption
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import (
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"crypto/aes"
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"crypto/cipher"
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"strconv"
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"github.com/xtls/xray-core/common/errors"
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"golang.org/x/crypto/chacha20poly1305"
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)
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func encodeHeader(b []byte, l int) {
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b[0] = 23
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b[1] = 3
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b[2] = 3
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b[3] = byte(l >> 8)
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b[4] = byte(l)
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}
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func decodeHeader(b []byte) (int, error) {
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if b[0] == 23 && b[1] == 3 && b[2] == 3 {
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l := int(b[3])<<8 | int(b[4])
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if l < 17 || l > 17000 { // TODO
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return 0, errors.New("invalid length in record's header: " + strconv.Itoa(l))
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}
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return l, nil
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}
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return 0, errors.New("invalid record's header")
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}
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func newAead(c byte, k []byte) (aead cipher.AEAD) {
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if c&1 == 1 {
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block, _ := aes.NewCipher(k)
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aead, _ = cipher.NewGCM(block)
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} else {
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aead, _ = chacha20poly1305.New(k)
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}
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return
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}
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func increaseNonce(nonce []byte) {
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for i := range 12 {
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nonce[11-i]++
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if nonce[11-i] != 0 {
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break
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}
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if i == 11 {
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// TODO
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}
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}
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}
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