This thread is for discussions of Create Hashes - MD5, SHA1, SHA256, SHA384, SHA512 .

For SHA1 and MD5 you can simply use:

string hashedText = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile("some text", "sha1");

To get the same result as the md5() function in PHP, use ASCIIEncoding!
As in: ASCIIEncoding UE = new ASCIIEncoding();

Another note:
Yes, there is a simpeler way to do md5 and sha1, but if i have a class for SHA256, 384 and 512, I'd like to combine all of them into one not doing 512 with the class and sha1 with something else.

Note, the author wrote that the result of a Hash is unique.  This is NEVER the case for a hash function.  Hashes are consistent.  Given a hash function H and a value a, H(a) = H(a) (i.e., hashes aren't random in a way which varies invocation to invocation.

But given a,b with a!=b it is not true that H(a) != H(b).  Indeed for any digest hash one can find a,b with a!=b and H(a) = H(b).

BE WARNED.  Never hash something that is used as a primary key.  E.g., HASH passwords but never hash usernames.

Thanks a lot

Hi,

I'm using SHA1 to hash the some code in vb.net(desktop app). but when i create SHA1 in PHP it doesn't match with the one i created with vb.net.I filtered out all the special chars in hash generated using vb.net (like =,+ etc).The hash thus trimmed out is only 20-22 chars but when i used php itz above 30. Pls help me

Tom

Is it possible to hash files instead of text? I know I can do it with MD5 and SHA1 (with a FileStream and "System.Security.Cryptography.MD5CryptoServiceProvider" and "System.Security.Cryptography.SHA1CryptoServiceProvider")

but when I tried generated any others it gave me a diffrent hash every time(SHA256,SHA384 and SHA512)...

 Hi just like jitz I am struggling to realise a result that matches the SHA1 result when using php can anybody help clarify how to get the same result pls

Maybe you will find this post adds more light to the issue.

I'm sure you've found the answer by now, but in case anybody else is on the same quest, maybe this will help:

Porting the Equivalent of PHP’s MD5 to .NET platform in C#