sa_ctx_info
struct sa_ctx_info *sa_ctx = req->enc ? &req->ctx->enc : &req->ctx->dec;
int sa_init_sc(struct sa_ctx_info *ctx, const struct sa_match_data *match_data,
static void sa_free_ctx_info(struct sa_ctx_info *ctx,
static int sa_init_ctx_info(struct sa_ctx_info *ctx,
struct sa_ctx_info enc;
struct sa_ctx_info dec;
struct sa_ctx_info auth;