[openssl-users] OpenSSL v1.1.1 static library size reduction

Matt Caswell matt at openssl.org
Mon Dec 24 12:31:18 UTC 2018

On 21/12/2018 06:12, prithiraj das wrote:
> I am using OpenSSL 1.1.1 from OpenSSL's website and trying to build OpenSSL on a
> Windows 64 bit machine using Perl 64 bit version and nasm v2.13.03. I have used
> the *no-shared* option in the Perl Configure to only build the static library
> and the resulting size of the *libcrypto.lib* file is almost 19 MB. The *.exe*
> file generated is 3173 KB. RSA functionality (keypair generation, encryption,
> decryption) is what we all need and as per the need, the goal is to
> reduce *libcrypto.lib *to less than 3 MB. Using the generated .exe file is not
> an option.
> Please suggest ways to reduce the libcrypto.lib size to less than 3 MB on this
> 64 bit machine keeping only RSA functionality.
>  And, is it possible by any chance that the size of libcrypto.lib will be
> smaller if OpenSSL is being built on a Windows 32 bit machine using a Windows 32
> bit configuration option VC-WIN32?

You can try adding "-DOPENSSL_SMALL_FOOTPRINT" onto the end of your Configure
line. You might also want to experiment with the various "no-*" options
described in the INSTALL file.


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