Xray-core/transport/internet/kcp/cryptreal.go

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package kcp
import (
"crypto/aes"
"crypto/cipher"
"crypto/sha256"
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"github.com/xtls/xray-core/common"
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)
func NewAEADAESGCMBasedOnSeed(seed string) cipher.AEAD {
hashedSeed := sha256.Sum256([]byte(seed))
aesBlock := common.Must2(aes.NewCipher(hashedSeed[:16])).(cipher.Block)
return common.Must2(cipher.NewGCM(aesBlock)).(cipher.AEAD)
}