21 static void dh_clear_ctx(struct dh_ctx *ctx)  in dh_clear_ctx()  argument
23 	mpi_free(ctx->p);  in dh_clear_ctx()
24 	mpi_free(ctx->q);  in dh_clear_ctx()
25 	mpi_free(ctx->g);  in dh_clear_ctx()
26 	mpi_free(ctx->xa);  in dh_clear_ctx()
27 	memset(ctx, 0, sizeof(*ctx));  in dh_clear_ctx()
36 static int _compute_val(const struct dh_ctx *ctx, MPI base, MPI val)  in _compute_val()  argument
39 	return mpi_powm(val, base, ctx->xa, ctx->p);  in _compute_val()
52 static int dh_set_params(struct dh_ctx *ctx, struct dh *params)  in dh_set_params()  argument
57 	ctx->p = mpi_read_raw_data(params->p, params->p_size);  in dh_set_params()
58 	if (!ctx->p)  in dh_set_params()
62 		ctx->q = mpi_read_raw_data(params->q, params->q_size);  in dh_set_params()
63 		if (!ctx->q)  in dh_set_params()
67 	ctx->g = mpi_read_raw_data(params->g, params->g_size);  in dh_set_params()
68 	if (!ctx->g)  in dh_set_params()
77 	struct dh_ctx *ctx = dh_get_ctx(tfm);  in dh_set_secret()  local
81 	dh_clear_ctx(ctx);  in dh_set_secret()
86 	if (dh_set_params(ctx, &params) < 0)  in dh_set_secret()
89 	ctx->xa = mpi_read_raw_data(params.key, params.key_size);  in dh_set_secret()
90 	if (!ctx->xa)  in dh_set_secret()
96 	dh_clear_ctx(ctx);  in dh_set_secret()
109 static int dh_is_pubkey_valid(struct dh_ctx *ctx, MPI y)  in dh_is_pubkey_valid()  argument
111 	if (unlikely(!ctx->p))  in dh_is_pubkey_valid()
120 	if (mpi_cmp_ui(y, 1) < 1 || mpi_cmp(y, ctx->p) >= 0)  in dh_is_pubkey_valid()
124 	if (ctx->q) {  in dh_is_pubkey_valid()
131 		ret = mpi_powm(val, y, ctx->q, ctx->p);  in dh_is_pubkey_valid()
152 	struct dh_ctx *ctx = dh_get_ctx(tfm);  in dh_compute_value()  local
160 	if (unlikely(!ctx->xa)) {  in dh_compute_value()
171 		ret = dh_is_pubkey_valid(ctx, base);  in dh_compute_value()
175 		base = ctx->g;  in dh_compute_value()
178 	ret = _compute_val(ctx, base, val);  in dh_compute_value()
198 	struct dh_ctx *ctx = dh_get_ctx(tfm);  in dh_max_size()  local
200 	return mpi_get_size(ctx->p);  in dh_max_size()
205 	struct dh_ctx *ctx = dh_get_ctx(tfm);  in dh_exit_tfm()  local
207 	dh_clear_ctx(ctx);  in dh_exit_tfm()