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Diffstat (limited to 'lib/mbedtls-2.27.0/programs/pkey/ecdh_curve25519.c')
-rw-r--r--lib/mbedtls-2.27.0/programs/pkey/ecdh_curve25519.c242
1 files changed, 242 insertions, 0 deletions
diff --git a/lib/mbedtls-2.27.0/programs/pkey/ecdh_curve25519.c b/lib/mbedtls-2.27.0/programs/pkey/ecdh_curve25519.c
new file mode 100644
index 0000000..67f1363
--- /dev/null
+++ b/lib/mbedtls-2.27.0/programs/pkey/ecdh_curve25519.c
@@ -0,0 +1,242 @@
+/*
+ * Example ECDHE with Curve25519 program
+ *
+ * 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.
+ */
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#if defined(MBEDTLS_PLATFORM_C)
+#include "mbedtls/platform.h"
+#else
+#include <stdio.h>
+#include <stdlib.h>
+#define mbedtls_printf printf
+#define mbedtls_exit exit
+#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
+
+#if !defined(MBEDTLS_ECDH_C) || !defined(MBEDTLS_ECDH_LEGACY_CONTEXT) || \
+ !defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED) || \
+ !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_CTR_DRBG_C)
+int main( void )
+{
+ mbedtls_printf( "MBEDTLS_ECDH_C and/or MBEDTLS_ECDH_LEGACY_CONTEXT and/or "
+ "MBEDTLS_ECP_DP_CURVE25519_ENABLED and/or "
+ "MBEDTLS_ENTROPY_C and/or MBEDTLS_CTR_DRBG_C "
+ "not defined\n" );
+ mbedtls_exit( 0 );
+}
+#else
+
+#include "mbedtls/entropy.h"
+#include "mbedtls/ctr_drbg.h"
+#include "mbedtls/ecdh.h"
+
+
+int main( int argc, char *argv[] )
+{
+ int ret = 1;
+ int exit_code = MBEDTLS_EXIT_FAILURE;
+ mbedtls_ecdh_context ctx_cli, ctx_srv;
+ mbedtls_entropy_context entropy;
+ mbedtls_ctr_drbg_context ctr_drbg;
+ unsigned char cli_to_srv[32], srv_to_cli[32];
+ const char pers[] = "ecdh";
+ ((void) argc);
+ ((void) argv);
+
+ mbedtls_ecdh_init( &ctx_cli );
+ mbedtls_ecdh_init( &ctx_srv );
+ mbedtls_ctr_drbg_init( &ctr_drbg );
+
+ /*
+ * Initialize random number generation
+ */
+ mbedtls_printf( " . Seeding the random number generator..." );
+ fflush( stdout );
+
+ mbedtls_entropy_init( &entropy );
+ if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
+ (const unsigned char *) pers,
+ sizeof pers ) ) != 0 )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
+ goto exit;
+ }
+
+ mbedtls_printf( " ok\n" );
+
+ /*
+ * Client: initialize context and generate keypair
+ */
+ mbedtls_printf( " . Setting up client context..." );
+ fflush( stdout );
+
+ ret = mbedtls_ecp_group_load( &ctx_cli.grp, MBEDTLS_ECP_DP_CURVE25519 );
+ if( ret != 0 )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_ecp_group_load returned %d\n", ret );
+ goto exit;
+ }
+
+ ret = mbedtls_ecdh_gen_public( &ctx_cli.grp, &ctx_cli.d, &ctx_cli.Q,
+ mbedtls_ctr_drbg_random, &ctr_drbg );
+ if( ret != 0 )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_ecdh_gen_public returned %d\n", ret );
+ goto exit;
+ }
+
+ ret = mbedtls_mpi_write_binary( &ctx_cli.Q.X, cli_to_srv, 32 );
+ if( ret != 0 )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_mpi_write_binary returned %d\n", ret );
+ goto exit;
+ }
+
+ mbedtls_printf( " ok\n" );
+
+ /*
+ * Server: initialize context and generate keypair
+ */
+ mbedtls_printf( " . Setting up server context..." );
+ fflush( stdout );
+
+ ret = mbedtls_ecp_group_load( &ctx_srv.grp, MBEDTLS_ECP_DP_CURVE25519 );
+ if( ret != 0 )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_ecp_group_load returned %d\n", ret );
+ goto exit;
+ }
+
+ ret = mbedtls_ecdh_gen_public( &ctx_srv.grp, &ctx_srv.d, &ctx_srv.Q,
+ mbedtls_ctr_drbg_random, &ctr_drbg );
+ if( ret != 0 )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_ecdh_gen_public returned %d\n", ret );
+ goto exit;
+ }
+
+ ret = mbedtls_mpi_write_binary( &ctx_srv.Q.X, srv_to_cli, 32 );
+ if( ret != 0 )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_mpi_write_binary returned %d\n", ret );
+ goto exit;
+ }
+
+ mbedtls_printf( " ok\n" );
+
+ /*
+ * Server: read peer's key and generate shared secret
+ */
+ mbedtls_printf( " . Server reading client key and computing secret..." );
+ fflush( stdout );
+
+ ret = mbedtls_mpi_lset( &ctx_srv.Qp.Z, 1 );
+ if( ret != 0 )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_mpi_lset returned %d\n", ret );
+ goto exit;
+ }
+
+ ret = mbedtls_mpi_read_binary( &ctx_srv.Qp.X, cli_to_srv, 32 );
+ if( ret != 0 )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_mpi_read_binary returned %d\n", ret );
+ goto exit;
+ }
+
+ ret = mbedtls_ecdh_compute_shared( &ctx_srv.grp, &ctx_srv.z,
+ &ctx_srv.Qp, &ctx_srv.d,
+ mbedtls_ctr_drbg_random, &ctr_drbg );
+ if( ret != 0 )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_ecdh_compute_shared returned %d\n", ret );
+ goto exit;
+ }
+
+ mbedtls_printf( " ok\n" );
+
+ /*
+ * Client: read peer's key and generate shared secret
+ */
+ mbedtls_printf( " . Client reading server key and computing secret..." );
+ fflush( stdout );
+
+ ret = mbedtls_mpi_lset( &ctx_cli.Qp.Z, 1 );
+ if( ret != 0 )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_mpi_lset returned %d\n", ret );
+ goto exit;
+ }
+
+ ret = mbedtls_mpi_read_binary( &ctx_cli.Qp.X, srv_to_cli, 32 );
+ if( ret != 0 )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_mpi_read_binary returned %d\n", ret );
+ goto exit;
+ }
+
+ ret = mbedtls_ecdh_compute_shared( &ctx_cli.grp, &ctx_cli.z,
+ &ctx_cli.Qp, &ctx_cli.d,
+ mbedtls_ctr_drbg_random, &ctr_drbg );
+ if( ret != 0 )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_ecdh_compute_shared returned %d\n", ret );
+ goto exit;
+ }
+
+ mbedtls_printf( " ok\n" );
+
+ /*
+ * Verification: are the computed secrets equal?
+ */
+ mbedtls_printf( " . Checking if both computed secrets are equal..." );
+ fflush( stdout );
+
+ ret = mbedtls_mpi_cmp_mpi( &ctx_cli.z, &ctx_srv.z );
+ if( ret != 0 )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_ecdh_compute_shared returned %d\n", ret );
+ goto exit;
+ }
+
+ mbedtls_printf( " ok\n" );
+
+ exit_code = MBEDTLS_EXIT_SUCCESS;
+
+exit:
+
+#if defined(_WIN32)
+ mbedtls_printf( " + Press Enter to exit this program.\n" );
+ fflush( stdout ); getchar();
+#endif
+
+ mbedtls_ecdh_free( &ctx_srv );
+ mbedtls_ecdh_free( &ctx_cli );
+ mbedtls_ctr_drbg_free( &ctr_drbg );
+ mbedtls_entropy_free( &entropy );
+
+ mbedtls_exit( exit_code );
+}
+#endif /* MBEDTLS_ECDH_C && MBEDTLS_ECP_DP_CURVE25519_ENABLED &&
+ MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-21 21:15:57 +0000