Why is the value of public key type -1 after loading the SM2 certificate?

[liu-allen]

Openssl version 3.2.0，
SM2 certificate signed by SM2-WITH-SM3, using function
X509=PEM_read_bio_X509_AUX (bio, NULL, NULL, NULL);
EVP_PKEY * pkey=X509_get0_pubkey (x509);
After loading, the value of pkey ->type is -1。
Does openssl version 3.2.0 not support SM2 certificates signed by SM2-WITH-SM3?

[t8m]

This is expected. The -1 value is EVP_PKEY_KEYMGMT which means the key is held by a provider. You can check if it has SM2 type by using the EVP_PKEY_is_a() function.