On Fri, Jul 18, 2014 at 3:02 AM, <nicolas....@free.fr> wrote: > > Actually, there's no default digest. > When created, the EVP_MD_CTX struct is initialized to 0, then all pointers > are NULL by default, in particular ctx->type. > If a a digest was previously used, it can be reused if no EVP_MD is given, > otherwise the initialization will fail. > Hmmm... something does not sound correct.
I was tracing in the context of md_rand (crypto/rand/md_rand.c). When ssleay_rand_add() or ssleay_rand_bytes() is called, md_rand is mixing with something. Its clearly not setting `m` to something like EVP_md5(); rather its using the default implementation discussed in the docs. Jeff > ----- Mail d'origine ----- > De: Jeffrey Walton <noloa...@gmail.com> > À: OpenSSL Users List <openssl-users@openssl.org> > Envoyé: Fri, 18 Jul 2014 06:04:17 +0200 (CEST) > Objet: Default digest implementation? > > https://www.openssl.org/docs/crypto/EVP_DigestInit.html > > The doc states the default default digest implementation is used if > 'impl' is NULL. The docs also state "OpenSSL 1.0 and later does not > include the MD2 digest algorithm in the default configuration...". > > I found the call to EVP_DigestInit which calls EVP_DigestInit_ex. But > I'm getting lost in EVP_DigestInit_ex: > > if(impl) > { > ... > } > else > { > /* Ask if an ENGINE is reserved for this job */ > impl = ENGINE_get_digest_engine(type->type); > } > > I'm having trouble tracking down 'type' used by ENGINE_get_digest_engine. > > What is the default digest implementation for 1.0 and later? Or where > can I find the source file that sets the default? ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org
