Hello , thank you all for the replies. Very useful. I have seen in Openssl/crypto/RSA/rsa_local.h the definition of rsa_st has a pointer to RSA_METHOD and I can't see this filled in in any of the examples' set up or initializations, where is it filled in for the default provider , for the RSA algorithm? I can see the methods pointers are used later down in the call chain from RSA_private_decrypt() in providers/implementation/asymciphers/rsa_enc but I can't find where these methods' pointers are set and I would like to understand how I could pass a different method pointer in the parameters for a different mod_exp operation , for example, or how I could set it on a completely new RSA implementation mimicking the one in the default provider but with different methods where I need them changed, minimizing the differences with the default provider's RSA. Thank you
On Fri, 24 Sep 2021, 12:22 Matt Caswell, <m...@openssl.org> wrote: > > > On 24/09/2021 12:17, Dr Paul Dale wrote: > > What about: apps/rsa.c, apps/rsautl.c and apps/genrsa.c > > 3.0 doesn't use the RSA structure in the non-deprecated public API. > > > > You probably want the EVP_PKEY_fromdata call. > > An example of building an RSA key from its constituent parts is > available on the EVP_PKEY_fromdata() man page: > > https://www.openssl.org/docs/man3.0/man3/EVP_PKEY_fromdata.html > > Matt > > > > > > > > Pauli > > > > > > On 24/9/21 8:55 pm, Antonio Santagiuliana wrote: > >> Hello > >> Is there any app or command in the current Openssl master repository > >> that initialises and uses the new RSA provider? > >> I would like to see how the RSA* context parameter is filled in and > >> used, but I can't find an example using the RSA provider. > >> > >> > >> Thank you > >> > > >