On 26/04/18 23:48, Ken Goldman wrote: > On 04/26/18 16:37, Matt Caswell wrote: >> >> >> On 26/04/18 21:17, Ken Goldman wrote: >>> I have to get the raw public modulus, but I cannot X509_get_pubkey() >>> because of a non-standard object identifier. >>> >>> I can use X509_get_X509_PUBKEY() to get part way there. I see the DER >>> wrapped key in the public_key.data element, but I don't know an API to >>> get to that element. >> >> How about X509_PUBKEY_get0_param(): >> >> https://www.openssl.org/docs/man1.1.0/crypto/X509_PUBKEY_get0_param.html >> > > Thanks! That got me halfway there. > > That gives me a DER steam that is a SEQUENCE of two INTEGERs. The first > is the public modulus and the second one is the exponent. > > How do I go from that SEQUENCE to the components, and then from the > components to their byte streams and lengths? > > I assume it's some raw DER function like d2i_something. > How about create a mem-bio backed by the buffer containing the raw data and then call d2i_RSAPublicKey_bio()? Matt -- openssl-users mailing list To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users
