How to generate an MD5 data from the string

[Peter Afonin]

Hello,

I've never been dealing with the security before. Could you please help me
to write a code to generate an MD5 data from a string? I've been using this
example from MSDN:

Function MD5hash(data() As Byte) As Byte()
' This is one implementation of the abstract class MD5.
Dim md5 As New MD5CryptoServiceProvider()

Dim result As Byte() = md5.ComputeHash(data)

Return result
End Function

but perhaps made a mistake converting string to byte and couldn't fix it.

My string looks like this:

sCRC = "avp:" & dblSum.ToString & ":" & CLng(Format(Now, "yyyyMMddHHmmss"))
_
& ":pa0107THOP:shp_UserID=" & sUser _
& ":shp_Price=" & dblPrice.ToString & ":shp_PaymentNo=" _
& CLng(Format(Now, "yyyyMMddHHmmss")) & ":shp_Term=" _
& sTerm & ":shp_Email=" & sEmail

I will be passing this parameter as a querystring.

I would really appreciate your help.

Thank you,

--
Peter Afonin

[Patrice]

And the exact problem is (how do you convert) ?

I would suggest
[url]http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnnetsec/html/cryptosimplified.asp[/url]

Patrice
--

"Peter Afonin" <pva@speakeasy.net> a écrit dans le message de
news:OBsIoDnhEHA.1568@TK2MSFTNGP09.phx.gbl...

> Hello,
>
> I've never been dealing with the security before. Could you please help me
> to write a code to generate an MD5 data from a string? I've been using

this

> example from MSDN:
>
> Function MD5hash(data() As Byte) As Byte()
> ' This is one implementation of the abstract class MD5.
> Dim md5 As New MD5CryptoServiceProvider()
>
> Dim result As Byte() = md5.ComputeHash(data)
>
> Return result
> End Function
>
> but perhaps made a mistake converting string to byte and couldn't fix it.
>
> My string looks like this:
>
> sCRC = "avp:" & dblSum.ToString & ":" & CLng(Format(Now,

"yyyyMMddHHmmss"))

> _
> & ":pa0107THOP:shp_UserID=" & sUser _
> & ":shp_Price=" & dblPrice.ToString & ":shp_PaymentNo=" _
> & CLng(Format(Now, "yyyyMMddHHmmss")) & ":shp_Term=" _
> & sTerm & ":shp_Email=" & sEmail
>
> I will be passing this parameter as a querystring.
>
> I would really appreciate your help.
>
> Thank you,
>
> --
> Peter Afonin
>
>

[Peter Afonin]

Thank you, Patrice.

I'll try this, if it doesn't work I'll post my conversion here.

Peter

"Patrice" <nobody@nowhere.com> wrote in message
news:OL9PaRqhEHA.712@TK2MSFTNGP09.phx.gbl...

> And the exact problem is (how do you convert) ?
>
> I would suggest
>

[url]http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnnetsec/html/cryptosimplified.asp[/url]

>
> Patrice
> --
>
> "Peter Afonin" <pva@speakeasy.net> a écrit dans le message de
> news:OBsIoDnhEHA.1568@TK2MSFTNGP09.phx.gbl...

> > Hello,
> >
> > I've never been dealing with the security before. Could you please help

me

> > to write a code to generate an MD5 data from a string? I've been using

> this

> > example from MSDN:
> >
> > Function MD5hash(data() As Byte) As Byte()
> > ' This is one implementation of the abstract class MD5.
> > Dim md5 As New MD5CryptoServiceProvider()
> >
> > Dim result As Byte() = md5.ComputeHash(data)
> >
> > Return result
> > End Function
> >
> > but perhaps made a mistake converting string to byte and couldn't fix

it.

> >
> > My string looks like this:
> >
> > sCRC = "avp:" & dblSum.ToString & ":" & CLng(Format(Now,

> "yyyyMMddHHmmss"))

> > _
> > & ":pa0107THOP:shp_UserID=" & sUser _
> > & ":shp_Price=" & dblPrice.ToString & ":shp_PaymentNo=" _
> > & CLng(Format(Now, "yyyyMMddHHmmss")) & ":shp_Term=" _
> > & sTerm & ":shp_Email=" & sEmail
> >
> > I will be passing this parameter as a querystring.
> >
> > I would really appreciate your help.
> >
> > Thank you,
> >
> > --
> > Peter Afonin
> >
> >

>
>

[PL]

The absolute simplest way is to use:

string md5= System.Web.Security.FormsAuthentication.HashPasswo rdForStoringInConfigFile( str,"MD5");

where str is your string you want to computer the hash from and the last argument can
be "MD5" or "SHA1"

For more info look this up in the docs.

PL.


"Peter Afonin" <pva@speakeasy.net> wrote in message news:OBsIoDnhEHA.1568@TK2MSFTNGP09.phx.gbl...

> Hello,
>
> I've never been dealing with the security before. Could you please help me
> to write a code to generate an MD5 data from a string? I've been using this
> example from MSDN:
>
> Function MD5hash(data() As Byte) As Byte()
> ' This is one implementation of the abstract class MD5.
> Dim md5 As New MD5CryptoServiceProvider()
>
> Dim result As Byte() = md5.ComputeHash(data)
>
> Return result
> End Function
>
> but perhaps made a mistake converting string to byte and couldn't fix it.
>
> My string looks like this:
>
> sCRC = "avp:" & dblSum.ToString & ":" & CLng(Format(Now, "yyyyMMddHHmmss"))
> _
> & ":pa0107THOP:shp_UserID=" & sUser _
> & ":shp_Price=" & dblPrice.ToString & ":shp_PaymentNo=" _
> & CLng(Format(Now, "yyyyMMddHHmmss")) & ":shp_Term=" _
> & sTerm & ":shp_Email=" & sEmail
>
> I will be passing this parameter as a querystring.
>
> I would really appreciate your help.
>
> Thank you,
>
> --
> Peter Afonin
>
>