fix(des):修复DES加密时出现的密文字节数组长度不足的情况。

encryption/des/des.go

@@ -41,8 +41,8 @@ func Encrypt(data []byte, key []byte, padding encryption.PaddingMode, keyGenerat
 	}
 
 	iv := keyBytes[:]
-	cipherText := make([]byte, len(data))
 	plainText := encryption.Padding(data, block.BlockSize(), padding)
+	cipherText := make([]byte, len(plainText))
 	mode := cipher.NewCBCEncrypter(block, iv)
 	mode.CryptBlocks(cipherText, plainText)
 

encryption/padding.go

@@ -37,6 +37,9 @@ func Unpadding(data []byte, padding ...PaddingMode) []byte {
 	case PKCS7Padding:
 		length := len(data)
 		unpadding := int(data[length-1])
+		if length-unpadding < 0 {
+			return make([]byte, 0)
+		}
 		return data[:(length - unpadding)]
 	case NoPadding:
 		return data