diff --git a/crypto.go b/crypto.go
index 78d0e95..1c0a93a 100644
--- a/crypto.go
+++ b/crypto.go
@@ -112,9 +112,9 @@ func EncryptAndSign(v Message, key *rsa.PrivateKey, pub *rsa.PublicKey, signatur
 		return err
 	}
 
-	encBody := make([]byte, len(body))
 	enc := cipher2.NewCBCEncrypter(cipher, iv)
 	body = append(body, Pad(body)...)
+	encBody := make([]byte, len(body))
 	enc.CryptBlocks(encBody, body)
 	writer.Write([]byte(hex.EncodeToString(encBody)))