forked from s7techlab/cckit
/
event.go
40 lines (34 loc) · 1016 Bytes
/
event.go
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package encryption
import (
"encoding/base64"
"github.com/s7techlab/cckit/router"
"github.com/s7techlab/cckit/state"
)
// EventWithTransientKey creates encrypted event wrapper with provided key for symmetric encryption/decryption
func EventWithTransientKey(c router.Context) (state.Event, error) {
key, err := KeyFromTransient(c)
if err != nil {
return nil, err
}
return Event(c, key)
}
// Event encrypting the events before setEvent()
func Event(c router.Context, key []byte) (state.Event, error) {
//current state
s := c.Event()
s.UseSetTransformer(ToBytesEncryptor(key))
s.UseNameTransformer(StringEncryptor(key))
return s, nil
}
// EncryptStringWith returns state.StringTransformer encrypting string with provided key
func StringEncryptor(key []byte) state.StringTransformer {
return func(s string) (encrypted string, err error) {
var (
enc []byte
)
if enc, err = Encrypt(key, []byte(s)); err != nil {
return ``, err
}
return base64.StdEncoding.EncodeToString(enc), nil
}
}