Crypto Plugin

[GAG]

Introduction


This plugin provides you cryptographic interface using CryptoAPI.
Using this plugin you can get common cryptographic hashes like MD5, SHA1, MD2, MD4.

Plugin DLL size: 3 660 bytes (not packed), 2 886 bytes (upx packed)


How to use

1. Hash of string

Crypto::HashData "MD5" "String to be hashed"
Pop $0


Supported algorithms: MD5|SHA1|MD2|MD4

2. Hash of file

Crypto::HashFile "MD5" "$WINDIR\notepad.exe"
Pop $0


Supported algorithms: MD5|SHA1|MD2|MD4

Examples

Hash Calculator: HashCalc.nsi
Simple test: CryptoTest.nsi

[GAG]

Hash Calculator based on Crypto.dll

Hash Calculator:
Example usage of Crypto plugin

[CryptoNut]

SHA-256

Will this possibly support SHA-256 in the future?

[{ truparu }]

Great Plugin!

Great Plugin Is there source available for this plugin anywhere?

[GAG]

CryptoNut
Hashing realized via Microsoft CryptoAPI, so if CryptoAPI supports such algo, this algo is supported by plugin too. SHA-1 is already supported.

http://msdn.microsoft.com/library/en-us/seccrypto/security/cryptcreatehash.asp

{ truparu }
Thank you!
Yep, source will be available, when I'll rewrote it from scratch coz I lost my sources [no backup while crash... as always]

[marcpeterson]

CryptAcquireContext error 0x80090016

I've used this dll on my development system without a problem. But when I run the installer on some other systems, I get a CryptAcquireContext error 0x80090016.

I did a bit of digging and found this:

http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B238187

Do you know if your check for the NTE_BAD_KEYSET as it states on this line?

code:
if (GetLastError() == NTE_BAD_KEYSET)

What are the chances of a new version coming out any time soon? Thanks,

Marc

[GAG]

Hi, Marc
I know about CryptAcquireContext error 0x80090016
It's not related to link you posted.
I used enhanced crypto provider instead of basic one. On some OS enhanced version isn't installed (due to old stupid export limitations or on Win98 w/o IE6 with strong crypto support)
New version of this plugin will be published when I rewrote it from scratch
as i already said in prev post, I lost my sources.

[sag47]

Originally posted by GAG
Hi, Marc
I know about CryptAcquireContext error 0x80090016
It's not related to link you posted.
I used enhanced crypto provider instead of basic one. On some OS enhanced version isn't installed (due to old stupid export limitations or on Win98 w/o IE6 with strong crypto support)
New version of this plugin will be published when I rewrote it from scratch
as i already said in prev post, I lost my sources.

When you rewrite it can you include support for Whirlpool algorithm possibly? Also your installer puts the documentation in the wrong place. It goes in NSISDIR/Docs/Crypto and the source code (when you rewrite it) should go in NSISDIR/Contrib/Crypto.
SAM

[sag47]

Re: SHA-256

Originally posted by CryptoNut
Will this possibly support SHA-256 in the future?

http :// msdn2. microsoft. com/en-us/library/ms937738.aspx
(had to link this way because now this forum has some dumb link approval system)

Take out the spaces and you'll have your link.
That is all of the supported hash algorithms supported by the CryptAPI.

I've also added a link in the plugin's wiki page on nsis.

[sag47]

Hi GAG,
Hopefully this little snippet will help you rewrite your code faster. Here is a code example I downloaded from another community I belong to that uses the CryptoAPI.
SAM

[sag47]

Here is a slightly modified version of the the one above.

[GAG]

CryptoAPI Plugin NEWS

Hi sag47

Thank you for you support and updated NSIS Wiki page about my plugin.

When you rewrite it can you include support for Whirlpool algorithm possibly?

Whirlpool isn't included in any CrypoAPI implementation, so it can be implemented only using non-CryptoAPI method. If you can explain why Whirlpool is better than SHA-256|512, I'll try to add this algo.

Also your installer puts the documentation in the wrong place.

ok, will be placed in accordance to NSIS folder structure

That is all of the supported hash algorithms supported by the CryptAPI.

just check ALG_ID at MSDN and you'll see this note above CALG_SHA_256:
Windows XP and Windows 2000/NT:: This algorithm is not supported.

the only way to include support for SHA >=256 bits is to create a CryptoAPI-independent implementation which will increase plugin size (I do not really care about disk space anymore

well, I'll try to find more time now to implement some of your wishes

P.S. url tag needs to be approved? (see above)
P.P.S. ALG_ID at MSDN: http://msdn2.microsoft.com/en-us/library/aa375549.aspx

[********]

Well, the plug is broken not only on 98, but on 2000 as well.

CryptAcquireContext=0x80090016

[GAG]

what do you mean 'broken' ?
plugin was developed on Win2k sp4 and it works OK on many systems

[sag47]

Why was this added to the Wiki?

code:
Note that it will likely to fail with CryptAcquireContext=0x80090016 error on systems prior to WinXP.

http://nsis.sourceforge.net/mediawiki/index.php?title=Crypto_plug-in&diff=14789&oldid=12942

At the moment there doesn't appear to be sufficient research to indicate this problem with the exception of one person whose configuration could itself possibly be broken.

I just tested the cryto 1.1 with the following script test using NSIS v2.34 on Windows 2000 SP4 user privileges only.

code:
 Crypto::HashFile "MD5"  "$WINDIR\notepad.exe"

 Pop $0

 MessageBox MB_OK $0

The message returned was null and no hash was return yet I didn't get the error like the user above specified so I think before the wiki is edited that further testing is required.
SAM