Add the new modulus and the residue structures
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
diff --git a/library/bignum_mod.h b/library/bignum_mod.h
new file mode 100644
index 0000000..378c58d
--- /dev/null
+++ b/library/bignum_mod.h
@@ -0,0 +1,68 @@
+/**
+ * Internal bignum functions
+ *
+ * Copyright The Mbed TLS Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MBEDTLS_BIGNUM_MOD_H
+#define MBEDTLS_BIGNUM_MOD_H
+
+#include "common.h"
+
+#if defined(MBEDTLS_BIGNUM_C)
+#include "mbedtls/bignum.h"
+#endif
+
+
+typedef struct
+{
+ size_t n;
+ mbedtls_mpi_uint *p;
+} mbedtls_mpi_mod_residue;
+
+typedef void* mbedtls_mpi_mont_struct;
+typedef void* mbedtls_mpi_opt_red_struct;
+
+typedef struct {
+ mbedtls_mpi_uint *p;
+ size_t n; // number of limbs
+ size_t plen; // bitlen of p
+ int ext_rep; // signals external representation (eg. byte order)
+ int int_rep; // selector to signal the active member of the union
+ union rep
+ {
+ mbedtls_mpi_mont_struct mont;
+ mbedtls_mpi_opt_red_struct ored;
+ } rep;
+} mbedtls_mpi_mod_modulus;
+
+void mbedtls_mpi_mod_residue_release( mbedtls_mpi_mod_residue *r );
+
+int mbedtls_mpi_mod_residue_setup( mbedtls_mpi_mod_residue *r,
+ mbedtls_mpi_mod_modulus *m,
+ mbedtls_mpi_uint *p );
+
+void mbedtls_mpi_mod_modulus_init( mbedtls_mpi_mod_modulus *m );
+
+void mbedtls_mpi_mod_modulus_init( mbedtls_mpi_mod_modulus *m );
+
+int mbedtls_mpi_mod_modulus_setup( mbedtls_mpi_mod_modulus *m,
+ mbedtls_mpi_uint *p,
+ size_t n,
+ int ext_rep,
+ int int_rep );
+
+#endif /* MBEDTLS_BIGNUM_MOD_H */