mbedtls_oid_get_oid_by_sig_alg() function
Translate md_type and pk_type into SignatureAlgorithm OID
Arguments
pk_alg
public key algorithm
md_alg
message digest algorithm
oid
place to store ASN.1 OID string pointer
Return value
0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND