enex | 读取印象笔记导出的 .enex 文件，并转换为 markdown。

The method ImportXML does not return anything so you should remove x= from the front of the line that calls the method. (And also remove the parentheses from around the file path.)

Then, since you appear to be calling this from another application, you need to open the database to which you want to append the XML. Currently, there's no database, so the XML can't be imported. Something like this:

You can use a regex to do this

For old, RC2-based encryption (and if your tag doesn't have the cipher="AES" attribute, this is the RC2-based encryption), the algorithm roughly looks like this:

decodedString = RC2.decrypt(Base64.decode(encodedString), MD5.hash(UTF8.encode(passphrase)), 64);

In the decoded string, the first 4 chars of the string is the HEX-representation of the upper-byte of the CRC32 of the rest of the decoded string.

One caveat: when calculating CRC32, you may need to XOR it with -1 (0xFFFFFFFF) as there are different implementations of CRC32 in the wild that may or may not do this final XOR.