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v2fly/proxy/vmess/aead/kdf.go
2020-06-08 13:21:59 +08:00

27 lines
444 B
Go

package aead
import (
"crypto/hmac"
"crypto/sha256"
"hash"
)
func KDF(key []byte, path ...string) []byte {
hmacf := hmac.New(func() hash.Hash {
return sha256.New()
}, []byte(KDFSaltConst_VMessAEADKDF))
for _, v := range path {
hmacf = hmac.New(func() hash.Hash {
return hmacf
}, []byte(v))
}
hmacf.Write(key)
return hmacf.Sum(nil)
}
func KDF16(key []byte, path ...string) []byte {
r := KDF(key, path...)
return r[:16]
}