buffer_get_bignum(&auth->identities, key->rsa->e);
buffer_get_bignum(&auth->identities, key->rsa->n);
*comment = buffer_get_string(&auth->identities, NULL);
buffer_get_bignum(&auth->identities, key->rsa->e);
buffer_get_bignum(&auth->identities, key->rsa->n);
*comment = buffer_get_string(&auth->identities, NULL);