Squashed 'lib/mbedtls/external/mbedtls/' content from commit 2ca6c285a0dd

git-subtree-dir: lib/mbedtls/external/mbedtls
git-subtree-split: 2ca6c285a0dd3f33982dd57299012dacab1ff206

1 files changed, 84 insertions, 0 deletions

diff --git a/programs/pkey/mpi_demo.c b/programs/pkey/mpi_demo.c
new file mode 100644
index 00000000000..e83aa3259ce
--- /dev/null
+++ b/programs/pkey/mpi_demo.c
@@ -0,0 +1,84 @@
+/*
+ *  Simple MPI demonstration program
+ *
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+
+#include "mbedtls/build_info.h"
+
+#include "mbedtls/platform.h"
+
+#if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_FS_IO)
+#include "mbedtls/bignum.h"
+
+#include <stdio.h>
+#endif
+
+#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_FS_IO)
+int main(void)
+{
+    mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_FS_IO not defined.\n");
+    mbedtls_exit(0);
+}
+#else
+
+
+int main(void)
+{
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
+    mbedtls_mpi E, P, Q, N, H, D, X, Y, Z;
+
+    mbedtls_mpi_init(&E); mbedtls_mpi_init(&P); mbedtls_mpi_init(&Q); mbedtls_mpi_init(&N);
+    mbedtls_mpi_init(&H); mbedtls_mpi_init(&D); mbedtls_mpi_init(&X); mbedtls_mpi_init(&Y);
+    mbedtls_mpi_init(&Z);
+
+    MBEDTLS_MPI_CHK(mbedtls_mpi_read_string(&P, 10, "2789"));
+    MBEDTLS_MPI_CHK(mbedtls_mpi_read_string(&Q, 10, "3203"));
+    MBEDTLS_MPI_CHK(mbedtls_mpi_read_string(&E, 10,  "257"));
+    MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&N, &P, &Q));
+
+    mbedtls_printf("\n  Public key:\n\n");
+    MBEDTLS_MPI_CHK(mbedtls_mpi_write_file("  N = ", &N, 10, NULL));
+    MBEDTLS_MPI_CHK(mbedtls_mpi_write_file("  E = ", &E, 10, NULL));
+
+    mbedtls_printf("\n  Private key:\n\n");
+    MBEDTLS_MPI_CHK(mbedtls_mpi_write_file("  P = ", &P, 10, NULL));
+    MBEDTLS_MPI_CHK(mbedtls_mpi_write_file("  Q = ", &Q, 10, NULL));
+
+#if defined(MBEDTLS_GENPRIME)
+    MBEDTLS_MPI_CHK(mbedtls_mpi_sub_int(&P, &P, 1));
+    MBEDTLS_MPI_CHK(mbedtls_mpi_sub_int(&Q, &Q, 1));
+    MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&H, &P, &Q));
+    MBEDTLS_MPI_CHK(mbedtls_mpi_inv_mod(&D, &E, &H));
+
+    mbedtls_mpi_write_file("  D = E^-1 mod (P-1)*(Q-1) = ",
+                           &D, 10, NULL);
+#else
+    mbedtls_printf("\nTest skipped (MBEDTLS_GENPRIME not defined).\n\n");
+#endif
+    MBEDTLS_MPI_CHK(mbedtls_mpi_read_string(&X, 10, "55555"));
+    MBEDTLS_MPI_CHK(mbedtls_mpi_exp_mod(&Y, &X, &E, &N, NULL));
+    MBEDTLS_MPI_CHK(mbedtls_mpi_exp_mod(&Z, &Y, &D, &N, NULL));
+
+    mbedtls_printf("\n  RSA operation:\n\n");
+    MBEDTLS_MPI_CHK(mbedtls_mpi_write_file("  X (plaintext)  = ", &X, 10, NULL));
+    MBEDTLS_MPI_CHK(mbedtls_mpi_write_file("  Y (ciphertext) = X^E mod N = ", &Y, 10, NULL));
+    MBEDTLS_MPI_CHK(mbedtls_mpi_write_file("  Z (decrypted)  = Y^D mod N = ", &Z, 10, NULL));
+    mbedtls_printf("\n");
+
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
+cleanup:
+    mbedtls_mpi_free(&E); mbedtls_mpi_free(&P); mbedtls_mpi_free(&Q); mbedtls_mpi_free(&N);
+    mbedtls_mpi_free(&H); mbedtls_mpi_free(&D); mbedtls_mpi_free(&X); mbedtls_mpi_free(&Y);
+    mbedtls_mpi_free(&Z);
+
+    if (exit_code != MBEDTLS_EXIT_SUCCESS) {
+        mbedtls_printf("\nAn error occurred.\n");
+    }
+
+    mbedtls_exit(exit_code);
+}
+#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_FS_IO */