b2i_of_void_fn
#define dsa_decode_private_key (b2i_of_void_fn *)ossl_b2i_DSA_after_header
#define dsa_decode_public_key (b2i_of_void_fn *)ossl_b2i_DSA_after_header
#define rsa_decode_private_key (b2i_of_void_fn *)ossl_b2i_RSA_after_header
#define rsa_decode_public_key (b2i_of_void_fn *)ossl_b2i_RSA_after_header
b2i_of_void_fn *read_private_key;
b2i_of_void_fn *read_public_key;