[Feature]Upload Modem source code
Change-Id: Id4294f30faced84d3e6fd6d5e61e1111bf287a37
diff --git a/mcu/driver/che/include/dhm.h b/mcu/driver/che/include/dhm.h
new file mode 100644
index 0000000..85f1bef
--- /dev/null
+++ b/mcu/driver/che/include/dhm.h
@@ -0,0 +1,127 @@
+/**
+ * \file dhm.h
+ */
+#ifndef XYSSL_DHM_H
+#define XYSSL_DHM_H
+
+#include "bignum.h"
+
+#define XYSSL_ERR_DHM_BAD_INPUT_DATA -0x0480
+#define XYSSL_ERR_DHM_READ_PARAMS_FAILED -0x0490
+#define XYSSL_ERR_DHM_MAKE_PARAMS_FAILED -0x04A0
+#define XYSSL_ERR_DHM_READ_PUBLIC_FAILED -0x04B0
+#define XYSSL_ERR_DHM_MAKE_PUBLIC_FAILED -0x04C0
+#define XYSSL_ERR_DHM_CALC_SECRET_FAILED -0x04D0
+
+typedef struct
+{
+ int len; /*!< size(P) in chars */
+ mpi P; /*!< prime modulus */
+ mpi G; /*!< generator */
+ mpi X; /*!< secret value */
+ mpi GX; /*!< self = G^X mod P */
+ mpi GY; /*!< peer = G^Y mod P */
+ mpi K; /*!< key = GY^X mod P */
+ mpi RP; /*!< cached R^2 mod P */
+}dhm_context;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief Parse the ServerKeyExchange parameters
+ *
+ * \param ctx DHM context
+ * \param p &(start of input buffer)
+ * \param end end of buffer
+ *
+ * \return 0 if successful, or an XYSSL_ERR_DHM_XXX error code
+ */
+int dhm_read_params( dhm_context *ctx,
+ unsigned char **p,
+ unsigned char *end );
+
+/**
+ * \brief Setup and write the ServerKeyExchange parameters
+ *
+ * \param ctx DHM context
+ * \param x_size private value size in bits
+ * \param output destination buffer
+ * \param olen number of chars written
+ * \param f_rng RNG function
+ * \param p_rng RNG parameter
+ *
+ * \note This function assumes that ctx->P and ctx->G
+ * have already been properly set (for example
+ * using che_mpi_read_string or che_mpi_read_binary).
+ *
+ * \return 0 if successful, or an XYSSL_ERR_DHM_XXX error code
+ */
+int dhm_make_params( dhm_context *ctx, int s_size,
+ unsigned char *output, int *olen,
+ int (*f_rng)(void *), void *p_rng );
+
+int dhm_make_params_internal( dhm_context *ctx, int x_size,
+ int (*f_rng)(void *), void *p_rng );
+
+/**
+ * \brief Import the peer's public value G^Y
+ *
+ * \param ctx DHM context
+ * \param input input buffer
+ * \param ilen size of buffer
+ *
+ * \return 0 if successful, or an XYSSL_ERR_DHM_XXX error code
+ */
+int dhm_read_public( dhm_context *ctx,
+ unsigned char *input, int ilen );
+
+/**
+ * \brief Create own private value X and export G^X
+ *
+ * \param ctx DHM context
+ * \param x_size private value size in bits
+ * \param output destination buffer
+ * \param olen must be equal to ctx->P.len
+ * \param f_rng RNG function
+ * \param p_rng RNG parameter
+ *
+ * \return 0 if successful, or an XYSSL_ERR_DHM_XXX error code
+ */
+int dhm_make_public( dhm_context *ctx, int s_size,
+ unsigned char *output, int olen,
+ int (*f_rng)(void *), void *p_rng );
+int dhm_make_public_internal( dhm_context *ctx, int x_size,
+ int (*f_rng)(void *), void *p_rng );
+
+/**
+ * \brief Derive and export the shared secret (G^Y)^X mod P
+ *
+ * \param ctx DHM context
+ * \param output destination buffer
+ * \param olen number of chars written
+ *
+ * \return 0 if successful, or an XYSSL_ERR_DHM_XXX error code
+ */
+int dhm_calc_secret( dhm_context *ctx,
+ unsigned char *output, int *olen );
+int dhm_calc_secret_internal( dhm_context *ctx);
+
+/*
+ * \brief Free the components of a DHM key
+ */
+void dhm_free( dhm_context *ctx );
+
+/**
+ * \brief Checkup routine
+ *
+ * \return 0 if successful, or 1 if the test failed
+ */
+int dhm_self_test( int verbose );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif