PassByYou888 / Fastmd5
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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