Login or Register ::  Home  ::  Search  ::  Your Account  ::  Forums  ::   Waraxe Advisories  ::  Tools  :: May 24, 2013 Menu  Home  Logout  Discussions  Forums  Members List  IRC chat  Tools  Base64 coder  MD5 hash  CRC32 checksum  ROT13 coder  SHA-1 hash  URL-decoder  Sql Char Encoder  Affiliates  y3dips ITsec  Md5 Cracker  User Manuals  AlbumNow  Content  Content  Sections  FAQ  Top  Info  Feedback  Recommend Us  Search  Journal  Your Account User Info Welcome, Anonymous Nickname Password (Register) Membership: Latest: derwinelvis79 New Today: 1 New Yesterday: 3 Overall: 8636 People Online: Visitors: 204 Members: 2 Total: 206 Online Now: 01: derwinelvis79 - Your Account 02: jammy99 - Forums milw0rm ·[local exploits] - Ophcrack v3.5.0 - Local Code Execution BOF ·[remote exploits] - MS Internet Explorer & MSN Explorer Arbitrary File Overwrite ·[dos / poc] - win32k!EPATHOBJ::pprFlatt enRec Uninitialized Next Pointer Testcase ·[remote exploits] - Linksys WRT160nv2 apply.cgi Remote Command Injection ·[remote exploits] - D-Link DIR615h OS Command Injection Vulnerability ·[web applications] - iOS < 5.0 Free Apps/Music Bug ·[web applications] - Haraj Script Stored XSS and File Upload Vulnerability ·[web applications] - Dsl Router D-link BZ_1.06 Multiple Vulnerabilities ·[local exploits] - Glibc 2.11.3 / 2.12.x LD_AUDIT libmemusage.so Local Root Exploit ·[web applications] - Moa Gallery 1.2.6 Multiple Vulnerabilities read more... PacketStorm News ·CAREL pCOWeb 1.5.0 Default Credential Shell Access ·Microsoft Internet Explorer 10-9 Object Confusion Sandbox Bypass ·Microsoft Internet Explorer 10-9-8-7-6 VML Remote Integer Overflow ·Debian Security Advisory 2672-1 ·Debian Security Advisory 2671-1 ·Red Hat Security Advisory 2013-0856-01 ·Red Hat Security Advisory 2013-0855-01 ·Infotecs ViPNet Products Privilege Escalation ·Slackware Security Advisory - kernel Updates ·Red Hat Security Advisory 2013-0847-01 read more... IT Security and Insecurity Portal www.waraxe.us Forum Index -> Assembler -> mmx strlen implementation    View previous topic :: View next topic  mmx strlen implementation Posted: Sat Feb 04, 2006 3:19 pm erg0t Valuable expert   Joined: Apr 08, 2005 Posts: 55 Location: Uruguay Hi, yesterday I was iluminated and it ended in a very fast and small strlen implementation. It uses 2 general registers, two mmx registers, and has only one branch. Can be modified easly to scan for another bytes. Here is the fasm macro: macro strlen Param { mov ecx, Param pxor mm1,mm1 sub ecx, 8 bucle: add ecx, 8 movq mm0, [ecx] pcmpeqb mm0,mm1 pmovmskb eax,mm0 test eax, eax jz bucle sub ecx, Param bsf eax, eax add eax, ecx } Posted: Tue Feb 07, 2006 7:54 pm erg0t Valuable expert   Joined: Apr 08, 2005 Posts: 55 Location: Uruguay I optimized a little the rutine. Benchmarks: old Quote: real 0m9.412s user 0m9.355s sys 0m0.025s new Quote: real 0m8.120s user 0m8.073s sys 0m0.019s new code: Quote: macro strlen Param { mov ecx, Param pxor mm1,mm1 bucle: movq mm0, [ecx] add ecx, 8 pcmpeqb mm0,mm1 pmovmskb eax,mm0 test eax, eax jz bucle bsf eax, eax lea eax, [ecx+eax-8] sub eax, Param } Posted: Thu Feb 09, 2006 12:00 am LINUX Moderator   Joined: May 24, 2004 Posts: 404 Location: Caiman iluminated code personal note > pone el source del bot aka no seas careta Posted: Thu Feb 09, 2006 12:05 am erg0t Valuable expert   Joined: Apr 08, 2005 Posts: 55 Location: Uruguay LINUX wrote: iluminated code personal note > pone el source del bot aka no seas careta todavia le falta xD mmx strlen implementation   www.waraxe.us Forum Index -> Assembler You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum All times are GMT   Page 1 of 1   All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First  Select a forum Security Research by waraxe----------------General discussionHow to fixMetasploit related Hash cracking requests----------------MD5 hashesAll other hashesHash related information http://www.waraxe.us portal----------------SuggestionsCooperation proposals Security bugs and issues in general----------------Newbies cornerSql injectionCross-site scripting aka XSSRemote file inclusionFull path disclosureShell commands injectionPhishing and Social EngineeringAll other security holes Various software----------------PhpNukePostNukePhpBBXMB forumvBulletin BoardInvision Power Boarde107MamboJoomlaXOOPSM$ WindowsLinux worldAll other softwareCoppermine Photo Gallery Programming languages----------------PhpMySqlPerlJavaJavascriptC and C++Visual BasicBorland Delphi and PascalPythonHTML and XMLAssembler Reverse engineering----------------Newbies cornerDisassemblingPHP script decode requests Miscellaneous stuff----------------Future of the ITNanotechnologyFun cornerLinksTry2hack sitesProxy database Direct Downloads----------------ToolsTutorialsWordlists Recycle Bin----------------Removed messagesOutdated posts   Powered by phpBB © 2001-2008 phpBB Group

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