Question

How do I use PasswordSalt and MD5 hashing in asp.net formsauthentication- based on a php salt

Asked by: DidiahProd

I'm migrating a vbulletin php application into an asp.net application.  I have passwords that were created using the following code:

$phphashedpassword = md5(md5(password) + salt) ;

now i have an md5 based password and hex driven salt.

How do i authenticate with these parameters using formsauthenticaiton?
the following code doesn't work:

Dim saltAndPwd As String = String.Concat(clearpassword, salt)
hashedpassword = FormsAuthentication.HashPasswordForStoringInConfigFile(saltAndPwd, "md5").ToLower


in my opinion, hashedpassword should be the same as $phphashedpassword.


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Asked On
2009-01-26 at 21:26:46ID24086038
Tags

MD5

,

SHA1 passwordsalt hashing formsauthentication membershipuser

Topics

Programming for ASP.NET

,

PHP Scripting Language

Participating Experts
2
Points
500
Comments
3

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Answers

 

by: DropZonePosted on 2009-01-27 at 10:40:12ID: 23479598

Try the following.

    -dZ.

' We need to hash the clear pwd and concatenate the salt
' then hash the resulting string:
' $phphashedpassword = md5(md5(password) + salt) ;
Dim pwdHash As String = FormsAuthentication.HashPasswordForStoringInConfigFile(clearpassword, "md5")
hashedpassword = FormsAuthentication.HashPasswordForStoringInConfigFile(pwdHash & salt, "md5").ToLower()
                                              
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by: jorge_torizPosted on 2009-02-09 at 15:42:58ID: 23595857

FormsAuthentication.HashPasswordForStoringInConfigFile(FormsAuthentication.HashPasswordForStoringInConfigFile(clearpassword, "md5") + salt, "md5")

20120131-EE-VQP-002

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