Building OpenSSL with Emscripten

Jakob Bohm jb-openssl at
Fri May 10 06:03:53 UTC 2019

By the way, has anyone worked on a feature or patch to use browser
provided crypto functions (WebCrypto etc.) when compiled to
pseudo-javascript via EmScripten or WebAssembly?

On 10/05/2019 07:43, Dr Paul Dale wrote:
> Configure with the _no-asm_ option.
> It will be a **lot** slower.
>> On 10 May 2019, at 3:33 pm, Sunghyun Park <sunggg at 
>> <mailto:sunggg at>> wrote:
>> Nice to meet you all :)
>> I faced a problem while building assembly code in OpenSSL (e.g., 
>> crypto/x86_64cpuid.s) with Emscripten.
>> Since Emscripten does not support compilation for assembly code (As 
>> far as I know), I'm wondering if there is any version of OpenSSL that 
>> does not require compiling assembly code.
>> Or, if there is anyone who experienced the similar problem, please 
>> share your experience.


Jakob Bohm, CIO, Partner, WiseMo A/S.
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