Hello Hanno, Thanks for your thanks for you quickly replay.

I have an error compilation, I'm using nios2-linux-uclibc for my cross compilation and uclinux architecture, the linux kernel is 2.60 but I have this error when I try to compile the library, I want to use the library as a simple client using TLS1.2

$ make static CC aes.c CC aesni.c CC arc4.c CC aria.c CC asn1parse.c CC asn1write.c CC base64.c CC bignum.c CC blowfish.c CC camellia.c CC ccm.c CC chacha20.c CC chachapoly.c CC cipher.c CC cipher_wrap.c CC cmac.c CC ctr_drbg.c CC des.c CC dhm.c CC ecdh.c CC ecdsa.c CC ecjpake.c CC ecp.c CC ecp_curves.c CC entropy.c CC entropy_poll.c entropy_poll.c:56:2: #error "Platform entropy sources only work on Unix and Windows, see MBEDTLS_NO_PLATFORM_ENTROPY in config.h" Makefile:285: recipe for target 'entropy_poll.o' failed make: *** [entropy_poll.o] Error 1

BTW the article is not found https://tls.mbed.org/kb/how-to/add-a-random-generator.

Many thanks!!

On Tue, May 19, 2020 at 9:01 AM Hanno Becker Hanno.Becker@arm.com wrote:

Hi Palomo,

Please take a look at the recent thread https://lists.trustedfirmware.org/pipermail/mbed-tls/2020-April/000069.html

which should give you a better understanding of how Mbed TLS manages and uses entropy from the underlying system.

Regards, Hanno

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*From:* mbed-tls mbed-tls-bounces@lists.trustedfirmware.org on behalf of Jesus Gualberto Palomo Garcia via mbed-tls < mbed-tls@lists.trustedfirmware.org> *Sent:* Tuesday, May 19, 2020 2:56 PM *To:* mbed-tls@lists.trustedfirmware.org < mbed-tls@lists.trustedfirmware.org> *Subject:* [mbed-tls] support mbedTLS no entropy source

Hi all!

I'm Palomo and I've been working with your library a few weeks ago, I'm using Linux kernel 2.60 but my embedded system has a limit entropy source, i now that this is a critical point, but How can I use your library if I want to use a other entropy source?

Thanks and waiting for you!

-- *¡Saludos! Best wishes!*

• Jesus Palomo México, D.F. *