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parthy #1
Member since Mar 2007 · 9 posts
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Subject: how to convert md5 to string
Hi guys,

I know this question may not be relevant to agsxmpp but I still want to know if someone can help.

How do I convert from md5 to string in c#? I think it is not possible. I am writing a gateway using agsxmpp and I need to pass the digest to a non-xmpp server. That non-xmpp server always replies back with "invalid password". However I can also login by sending a clear-text password (although this is a huge security risk). So I want to know if I can convert somehow the digest back to string and then send it to the non-xmpp server to authenticate.

Thank you,

parthy
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Jabberer #2
Member since Feb 2006 · 249 posts
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Look at the HexToString funktion in Hash.cs in agsXMPP. This is how hashes are converted to a string in XMPP.
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parthy #3
Member since Mar 2007 · 9 posts
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Subject: is it possible to convert a md5 hash to original string
Thanks for the response.

But I dont think HexToString will not work for me. Based on this forum: http://www.webmasterworld.com/forum88/10659.htm , you cannot convert a md5 hash back to original string.

I need the original string of the password which I will rehash it (with a new MD5 hash) and then send it to my non-XMPP server.

Any idea how I could possibly do this?

thank you
parthy
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Alex #4
Member since Feb 2003 · 4317 posts · Location: Germany
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Quote by parthy:
But I dont think HexToString will not work for me. Based on this forum: http://www.webmasterworld.com/forum88/10659.htm , you cannot convert a md5 hash back to original string.
You never can convert a Hash back to the original string or file. This is the idea of hashing. The server has the password and stored it in plain text or also as a Hash. If its stored as plain then the server also build the Hash and compares the Hashes. If they match then the password is correct.

Alex
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