how to decrypt a string converted by a php md5 algorithm in .net ?? i have to read the password field in database in order to make a login form in .net mobile application. the password is encrypted in md5 algorithm using php language. or... can i run a md5 function written in php language to decrypt the password from the .net application ?? or any other idea ??

Usually when you are doing something like this, instead of decrypting the password you encrypt the one entered and see if the two encryptions match.

However, if you are actually trying to decrypt it, then you may need something else. I don't think that .NET has any description methods for md5.

Peter is correct. MD5 is a one-way only encryption algorithm. With MD5, any given plain-text input will always result in the same output. So you certainly can use .Net to do it.

Look here for articles on it are located here:

http://aspnet.4guysfromrolla.com/articles/103002-1.aspx

Their example uses asp.net but I have used this in a windows application as well.

J

thanks for the answers planoie and katsarosj. i've figured it out that the only way is comparing the 2 strings that have been encrypted. but i don't know how to make the encryption with md5 and whether the md5 algorithm exist in .net. thanks again!! especially for katsarosj for giving me the best solution.you're the best!! =}

I know that you can hash a password in the security namespace...

System.Web.Security.FormsAuthentication.HashPasswo rdForStoringInConfigFile("password", "md5")

I imagine if it's here, it might also be somewhere else. Of course, you could just use this method as it is.

there's still a problem..!! the .net md5 algorithm returns the result in array of bytes. while in my database, the password field is encrypted by the php md5 algorithm that returns the result in hexa. so if i want to compare both of the results, so how to convert the array of bytes to hexa in .net?? please helpp!! thx before ...

The next step is to convert the bytearray to a string then compare that string:

Convert.ToBase64String(yourByteArray)

I think that's what you're looking for, I hope it helps.


I HATE COMPUTERS!

here's the link to web site that offers md5 decryption
http://md5encryption.com/?mod=encrypt

I had also same problem .
Convert.ToBase64String(yourByteArray)

  convert bytes to string .but when we compare with string that database had by PHP MD5 encryption is different as its is hexa type .so suggest any other solution.
please help me