Added submodule contents into tree

externals/mbedtls/programs/fuzz/onefile.c

@@ -0,0 +1,69 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+/* This file doesn't use any Mbed TLS function, but grab mbedtls_config.h anyway
+ * in case it contains platform-specific #defines related to malloc or
+ * stdio functions. */
+#include "mbedtls/build_info.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size);
+
+int main(int argc, char **argv)
+{
+    FILE *fp;
+    uint8_t *Data;
+    size_t Size;
+    const char *argv0 = argv[0] == NULL ? "PROGRAM_NAME" : argv[0];
+
+    if (argc != 2) {
+        fprintf(stderr, "Usage: %s REPRODUCER_FILE\n", argv0);
+        return 1;
+    }
+    //opens the file, get its size, and reads it into a buffer
+    fp = fopen(argv[1], "rb");
+    if (fp == NULL) {
+        fprintf(stderr, "%s: Error in fopen\n", argv0);
+        perror(argv[1]);
+        return 2;
+    }
+    if (fseek(fp, 0L, SEEK_END) != 0) {
+        fprintf(stderr, "%s: Error in fseek(SEEK_END)\n", argv0);
+        perror(argv[1]);
+        fclose(fp);
+        return 2;
+    }
+    Size = ftell(fp);
+    if (Size == (size_t) -1) {
+        fprintf(stderr, "%s: Error in ftell\n", argv0);
+        perror(argv[1]);
+        fclose(fp);
+        return 2;
+    }
+    if (fseek(fp, 0L, SEEK_SET) != 0) {
+        fprintf(stderr, "%s: Error in fseek(0)\n", argv0);
+        perror(argv[1]);
+        fclose(fp);
+        return 2;
+    }
+    Data = malloc(Size);
+    if (Data == NULL) {
+        fprintf(stderr, "%s: Could not allocate memory\n", argv0);
+        perror(argv[1]);
+        fclose(fp);
+        return 2;
+    }
+    if (fread(Data, Size, 1, fp) != 1) {
+        fprintf(stderr, "%s: Error in fread\n", argv0);
+        perror(argv[1]);
+        free(Data);
+        fclose(fp);
+        return 2;
+    }
+
+    //launch fuzzer
+    LLVMFuzzerTestOneInput(Data, Size);
+    free(Data);
+    fclose(fp);
+    return 0;
+}