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What is this

implementation of the MD5 high performance algorithm with delphi

platform and architecture

processor architecture: x86,x64

supports platform: Win32,Win64

compatible: https and openssl

file support: greater than 4G

about author

fastMD5 assembler algorithm by Maxim Masiutin

https://github.com/maximmasiutin/MD5_Transform-x64

Advantages and Tech details

The main advantage of this 64-bit version is that it loads 64 bytes of hashed message into 8 64-bit registers (RBP, R8, R9, R10, R11, R12, R13, R14) at the beginning, to avoid excessive memory load operations througout the routine.

To operate with 32-bit values store in higher bits of a 64-bit register (bits 32-63) uses "Ror" by 32; 8 macro variables (M1-M8) are used to keep record or corrent state of whether the register has been Ror'ed or not.

It also has an ability to use Lea instruction instead of two sequental Adds (uncomment UseLea=1), but it is slower on Skylake processors. Also, Intel in the Optimization Reference Maual discourages us of Lea as a replacement of two adds, since it is slower on the Atom processors.

MD5_Transform-x64 is released under a dual license, and you may choose to use it under either the Mozilla Public License 2.0 (MPL 2.1, available from https://www.mozilla.org/en-US/MPL/2.0/) or the GNU Lesser General Public License Version 3, dated 29 June 2007 (LGPL 3, available from https://www.gnu.org/licenses/lgpl.html).

MD5_Transform-x64 is based on the following code by Peter Sawatzki.

The original notice by Peter Sawatzki follows.

Usage delphi

FastMD5(@buff[0], length(buff));

delphi implementation by [email protected]

https://github.com/PassByYou888/FastMD5/

2018-1-27