This is probably impossible to work out an encryption method around
an already written encryption method especially since the encryption method was written my microsoft but hey I thought I would askk anyway.

I am trying to build my own client for microsoft Messenger, but the problem is when you send the password to the server it is encrypted with a key which is sent to the client just before it has to send the password, the data which has the key in it is:

USR 6 MD5 S 966859855.1425786544

where the key is: 966859855.1425786544

and when the password is the letter a the data to be sent to the server is:

USR 7 MD5 S 713bcec36cce6e86404b2e302ee9a648

where 713bcec36cce6e86404b2e302ee9a648 is the encrypted password, some other example are:

ab - USR 7 MD5 S f5814add7c41588e0de193b1b2d561e5

abc - USR 7 MD5 S 55eb4d6a295d1ac9d798d9a5f43601b0

abcd - USR 7 MD5 S 2809772475ac9f0a7220a7b36c899c5b

abcde - USR 7 MD5 S 959954d442df5bbc2c1971946e7109e2

abcdef - USR 7 MD5 S 7b4d2b1b79542d234053802950f6581b

abcdefg - USR 7 MD5 S acdae445edf5a1b53296c247b9a05cbc

g - USR 7 MD5 S 558a29a4149a18529fc9fb0172a82604

h - USR 7 MD5 S 0138939145096616326a7a6a20eac835

i - USR 7 MD5 S c58630d429937ccf88aed0fc285d24a5

j - USR 7 MD5 S a5c5c10153429075f9ce10114f70b9aa

k - USR 7 MD5 S 2a7a2e169797323bfb93327dcf5e94f2

l - USR 7 MD5 S 28e5000688a9ec4623310311dcd2eae7

m - USR 7 MD5 S bc1bd82f70d795a188ec2215e1e9562e

n - USR 7 MD5 S 6c2a5b14a1f8a13988563107e2a05386

o - USR 7 MD5 S f60b3182c5859c3aeecaad3817c7911d

p - USR 7 MD5 S bbbdf4fd097b92bd590aa2b5e58735f7

q - USR 7 MD5 S 19b44579629fe244b1b10cd842d6940b

r - USR 7 MD5 S 00043ff5b9c144ed702b6eb45462c150

s - USR 7 MD5 S 45d1130f81166a88c11751cbe2b19c9a

t - USR 7 MD5 S 0adc806efeb77744d891c8049d91b0eb

u - USR 7 MD5 S 0f40d8b769d474fcf7bb5125b03bc73b

v - USR 7 MD5 S cbebc955fd91f52a892837643dc976b3

w - USR 7 MD5 S 73be31577eaf89e2669c5ac1e0ea08a5

x - USR 7 MD5 S 0f80bf4286fa96f95bdb4254ccd46782

y - USR 7 MD5 S 21d63ab8bd4285149b93a95d7c560621

z - USR 7 MD5 S 502b2f965cb063077a70a4f70023cd8d

I can login fine when I know the encrypted password (which I have to run msn messenger and sockspy it first to find my encrypted password) except I still gotta work out the instant messaging part of it.

this is probably impossible to work out but hey thought I'd ask incase anyone was extremely intelligent in the art of unencryption or something.

anyways I'd greatly appreciate any help on this, if anyone can.