Crypto plug-in

From NSIS Wiki

Author: GAG (talk, contrib)


Author: Anders (talk, contrib)


Plug-in Info

  • Version: 1.4
  • Type: Runtime plug-in (Ansi & Unicode)
  • Minimum OS: Win95.OSR2 (IE3+), WinNT4 (IE3+)
  • Minimum NSIS version: 2.45
  • License: Freeware
  • Download: Crypto.zip (3 KB)


Version 1.2 and earlier fails on Windows Server with the NTE_BAD_KEYSET error and should not be used!


Introduction

This plug-in allows you to generate cryptographic hashes and random numbers. It uses the Microsoft Cryptography API (MS-CAPI).


Supported hash algorithms

MD2, MD4, MD5, SHA1, SHA2, SHA2-384, SHA2-512.

The SHA-2 family is only supported on Windows XP.SP3, Windows 2003 with KB938397, and Vista or higher.


Examples

String hash

Crypto::HashData "SHA1" "The quick brown fox jumps over the lazy dog"
Pop $0
DetailPrint Hash=$0 ; 2FD4E1C67A2D28FCED849EE1BB76E7391B93EB12
!include LogicLib.nsh
ClearErrors
Crypto::HashData "SHA2" "Hello World"
Pop $0
${If} ${Errors}
	DetailPrint "SHA2 not supported, cannot calculate hash!"
${Else}
	DetailPrint "$0"
${EndIf}


File hash

!include LogicLib.nsh
ClearErrors
Crypto::HashFile "MD5" "$ExePath"
Pop $0
${If} ${Errors}
	DetailPrint "Unable to compute the hash!"
${Else}
	DetailPrint "MD5 of myself is $0"
${EndIf}


Random number generator

Crypto::RNG
Pop $0 ; $0 now contains 100 bytes of random data in hex format
StrCpy $0 "0x$0" 18 ; Extract the first 8 bytes
DetailPrint "64-bit random number: $0"


History

1.4 - 20160412 - Anders

  • Added RNG


1.3 - 20160406 - Anders

  • Rewritten from scratch
  • Supports SHA-2 on systems with PROV_RSA_AES
  • Sets the error flag on errors


1.2 - November 25, 2013 - GAG

  • Fixed CryptAcquireContext NTE_BAD_KEYSET (0x80090016) and NTE_KEYSET_ENTRY_BAD (0x8009001A) errors
  • Technical note: original Crypto.dll was unpacked and patched (CryptAcquireContext call parameters patched; corresponding relocation records removed; version information updated)


1.1 - May 6, 2004 - GAG

  • Created Hash Calculator example
  • Improved documentation


1.0 - April 7, 2004 - GAG

  • Initial release
  • Supported algorithms: MD5|SHA1|MD2|MD4|MAC


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