MP server IRC-like bot

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norbert
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MP server IRC-like bot

Post by norbert » May 3rd, 2010, 5:00 am

[Edit: Newer versions of wesirc are available; see further down this thread!]

As some of you already know, I'm currently working on a bot (coded in C) that will connect to the MP server to interact with users. My goal is to allow users to vote on maps and get map information via my bot. I have some code ready and it's attached to this post. Note that this is just version 0.1, so don't expect too much.

Two main problems with this code: 1. most of it works with a wesnothd on localhost, but not with server.wesnoth.org, and 2. for some reason, the hash created with the salt and password is incorrect. I'd appreciate help with both things.

I will update this wiki page and add a section before "The login procedure" about the handshake. Basically, the client sends 4 bytes (0x00 0x00 0x00 0x00) to get a new connection number. The server sends the number back and then the communication back and forth is <package size (4 bytes)><gzipped package>.
Attachments
wesirc-0.1.tar.gz
wesirc 0.1
(22.93 KiB) Downloaded 224 times
Last edited by norbert on June 4th, 2010, 6:39 pm, edited 2 times in total.

joshudson
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Re: MP server IRC-like bot

Post by joshudson » May 8th, 2010, 6:38 pm

Great! I've been after that info to make a command line lobby program.
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norbert
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Re: MP server IRC-like bot

Post by norbert » May 23rd, 2010, 3:23 am

Hi Sirp, I have a question about the unsigned char* md5 function in hash.cpp. Normally, md5 returns only readable characters, but the md5_worker.raw_digest() that this function returns contains non-readable characters. When I add two printf-lines to show the in- and output...

Code: Select all

unsigned char* md5(const std::string& input) {
  printf ("INPUT: >%s<\n", input.c_str());
  MD5 md5_worker;
  md5_worker.update((unsigned char*) input.c_str(), input.size());
  md5_worker.finalize();
  printf ("OUTPUT: >%s<\n", md5_worker.raw_digest());
  return md5_worker.raw_digest();
}
...and add a user/pass combination "testuser"/"testpass" to phpBB, with for example the salt "$H$9eCZoV4ty74753177", the first couple of printf outputs are:
Spoiler:
The first output should be: b3159a773652b766989242b00bc698cb
Why is it different, what's going on?

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Re: MP server IRC-like bot

Post by Dave » May 23rd, 2010, 4:08 am

norbert wrote:Hi Sirp, I have a question about the unsigned char* md5 function in hash.cpp. Normally, md5 returns only readable characters, but the md5_worker.raw_digest() that this function returns contains non-readable characters.
MD5 produces a 16 byte digest. It is customary for human readability to display these 16 bytes in hex, meaning you will see 32 hexadecimal characters. However, raw_digest() returns just the 16 bytes. Of course, printing out a raw digest in hex is pretty easy:

Code: Select all

for(int n = 0; n != 16; ++n) {
  printf("%02x", digest[n]);
}
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norbert
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Re: MP server IRC-like bot

Post by norbert » May 23rd, 2010, 7:03 pm

Dave wrote:MD5 produces a 16 byte digest.
Right; I should have seen that.
Anyways, thanks for the feedback.

[Edit: I attached a file to this post that shows (exactly) how hashed passwords are being generated in Wesnoth.]
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HashedPasswords.pdf
Hashed Password Generation in Wesnoth
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norbert
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Re: MP server IRC-like bot

Post by norbert » May 26th, 2010, 3:19 am

norbert wrote:As some of you already know, I'm currently working on a bot (coded in C) that will connect to the MP server to interact with users.
Okay, it was a lot of work, but I finally managed to fix the two bugs in version 0.1. Version 0.2 of wesirc is attached to this post. It now: connects to the server, sends its version number, redirects if instructed, if required generates a correct hashed password, sends ping replies, and replies to messages it receives. :D I'm now going to work on getting the bot to act as a bridge between wsrsw.org and the users in the lobby!
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wesirc-0.2.tar.gz
wesirc 0.2
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norbert
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Re: MP server IRC-like bot

Post by norbert » June 4th, 2010, 6:38 pm

Attached is wesirc version 0.3. I've added the first two WSRSW features to the bot, and it's now also communicating with the MySQL database. The added features are:

/whisper <NICK> mapp <scenario>
Returns the map pack that contains the <scenario> - if any.

/whisper <NICK> comment <scenario>|<comment>
Adds the <comment> to the add-on page of the <scenario>.
Attachments
wesirc-0.3.tar.gz
wesirc 0.3
(27.28 KiB) Downloaded 190 times

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norbert
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Re: MP server IRC-like bot

Post by norbert » June 21st, 2010, 3:51 pm

Attached is wesirc version 0.4. Two more WSRSW features were added:

/whisper <NICK> get_votes <scenario>|<whose>
Provides information about how the <scenario> is rated.
<whose> should be 'my' or 'all'
Example: /whisper <NICK> get_votes 4p - Isar's Cross|all

/whisper <NICK> vote <scenario>|derf<difficulty><enjoyment><replayability><favorite>
Adds your votes to the <scenario>.
votes should be '1' (low), '2' (normal) or '3' (high)
<favorite> should be '0' (no) or '1' (yes)
Example: /whisper <NICK> vote 4p - Isar's Cross|derf2130

This is the penultimate version to be added on the forum.
Attachments
wesirc-0.4.tar.gz
wesirc 0.4
(30.54 KiB) Downloaded 216 times

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