mirror of https://github.com/v2ray/v2ray-core
27 lines
444 B
Go
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]
|
|
}
|