Add a set of I/O functions for the modulus structure
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
diff --git a/library/bignum_mod.h b/library/bignum_mod.h
index 378c58d..62ecf2b 100644
--- a/library/bignum_mod.h
+++ b/library/bignum_mod.h
@@ -49,6 +49,16 @@
} rep;
} mbedtls_mpi_mod_modulus;
+typedef enum
+{
+ MBEDTLS_MPI_MOD_REP_INVALID = 0,
+ MBEDTLS_MPI_MOD_REP_MONTGOMERY,
+ MBEDTLS_MPI_MOD_REP_OPT_RED
+} mbedtls_mpi_mod_rep_selector;
+
+#define MBEDTLS_MI_MOD_EXT_REP_LE 0x1
+#define MBEDTLS_MI_MOD_EXT_REP_BE 0x2
+
void mbedtls_mpi_mod_residue_release( mbedtls_mpi_mod_residue *r );
int mbedtls_mpi_mod_residue_setup( mbedtls_mpi_mod_residue *r,
diff --git a/library/bignum_mod_raw.h b/library/bignum_mod_raw.h
new file mode 100644
index 0000000..8a202ba
--- /dev/null
+++ b/library/bignum_mod_raw.h
@@ -0,0 +1,39 @@
+/**
+ * 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_CORE_H
+#define MBEDTLS_BIGNUM_CORE_H
+
+#include "common.h"
+
+#if defined(MBEDTLS_BIGNUM_C)
+#include "mbedtls/bignum.h"
+#endif
+
+int mbedtls_mpi_mod_raw_read( mbedtls_mpi_uint *X,
+ mbedtls_mpi_mod_modulus *m,
+ unsigned char *buf,
+ size_t buflen );
+
+int mbedtls_mpi_mod_raw_write( mbedtls_mpi_uint *X,
+ mbedtls_mpi_mod_modulus *m,
+ unsigned char *buf,
+ size_t buflen );
+
+#endif /* MBEDTLS_BIGNUM_CORE_H */
diff --git a/library/bignum_new.c b/library/bignum_new.c
index 977b5d7..976301d 100644
--- a/library/bignum_new.c
+++ b/library/bignum_new.c
@@ -28,6 +28,7 @@
#include "mbedtls/bignum.h"
#include "bignum_core.h"
#include "bignum_mod.h"
+#include "bignum_mod_raw.h"
#define MPI_VALIDATE_RET( cond ) \
MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_MPI_BAD_INPUT_DATA )
@@ -407,4 +408,38 @@
return( 0 );
}
+int mbedtls_mpi_mod_raw_read( mbedtls_mpi_uint *X,
+ mbedtls_mpi_mod_modulus *m,
+ unsigned char *buf,
+ size_t buflen )
+{
+ if( m->ext_rep & MBEDTLS_MI_MOD_EXT_REP_LE )
+ return mbedtls_mpi_core_read_le( X, m->n, buf, buflen );
+
+ else if( m->ext_rep & MBEDTLS_MI_MOD_EXT_REP_BE )
+ return mbedtls_mpi_core_read_be( X, m->n, buf, buflen );
+
+ else
+ return( MBEDTLS_ERR_MPI_BAD_INPUT_DATA );
+
+ return( 0 );
+}
+
+int mbedtls_mpi_mod_raw_write( mbedtls_mpi_uint *X,
+ mbedtls_mpi_mod_modulus *m,
+ unsigned char *buf,
+ size_t buflen )
+{
+ if( m->ext_rep & MBEDTLS_MI_MOD_EXT_REP_LE )
+ return mbedtls_mpi_core_write_le( X, m->n, buf, buflen );
+
+ else if( m->ext_rep & MBEDTLS_MI_MOD_EXT_REP_BE )
+ return mbedtls_mpi_core_write_be( X, m->n, buf, buflen );
+
+ else
+ return( MBEDTLS_ERR_MPI_BAD_INPUT_DATA );
+
+ return( 0 );
+}
+
#endif /* MBEDTLS_BIGNUM_C */