[Assignment-7] working implementation of untrusted

7-SGX_Hands-on/src/app/util.c

@@ -1,13 +1,17 @@
+#include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 
 #include "util.h"
 #include "proxy.h"
+#include "proxysetup.h"
 #include "intermediary.h"
 
 
 static char* BIN_NAME = "SignatureProxy";
 
+static sgx_enclave_id_t global_eid = 0;
+
 void syntax_exit(void) {
     char* syntax =
         "SignatureProxy Version 0.0.0\n"
@@ -16,12 +20,166 @@ void syntax_exit(void) {
         "Commands:\n"
         "%s"
         "\n"
+        "%s"
+        "\n"
         "%s";
 
-    printf(syntax, BIN_NAME, intermediary_syntax(), proxy_syntax());
+    printf(syntax, BIN_NAME, intermediary_syntax(), proxy_syntax(), proxysetup_syntax());
     exit(1);
 }
 
 void set_bin_name(char* bin_name) {
     BIN_NAME = bin_name;
 }
+
+typedef struct _sgx_errlist_t {
+    sgx_status_t err;
+    const char *msg;
+    const char *sug; /* Suggestion */
+} sgx_errlist_t;
+
+/* Error code returned by sgx_create_enclave */
+static sgx_errlist_t sgx_errlist[] = {
+    {
+        SGX_ERROR_UNEXPECTED,
+        "Unexpected error occurred.",
+        NULL
+    },
+    {
+        SGX_ERROR_INVALID_PARAMETER,
+        "Invalid parameter.",
+        NULL
+    },
+    {
+        SGX_ERROR_OUT_OF_MEMORY,
+        "Out of memory.",
+        NULL
+    },
+    {
+        SGX_ERROR_ENCLAVE_LOST,
+        "Power transition occurred.",
+        "Please refer to the sample \"PowerTransition\" for details."
+    },
+    {
+        SGX_ERROR_INVALID_ENCLAVE,
+        "Invalid enclave image.",
+        NULL
+    },
+    {
+        SGX_ERROR_INVALID_ENCLAVE_ID,
+        "Invalid enclave identification.",
+        NULL
+    },
+    {
+        SGX_ERROR_INVALID_SIGNATURE,
+        "Invalid enclave signature.",
+        NULL
+    },
+    {
+        SGX_ERROR_OUT_OF_EPC,
+        "Out of EPC memory.",
+        NULL
+    },
+    {
+        SGX_ERROR_NO_DEVICE,
+        "Invalid SGX device.",
+        "Please make sure SGX module is enabled in the BIOS, and install SGX driver afterwards."
+    },
+    {
+        SGX_ERROR_MEMORY_MAP_CONFLICT,
+        "Memory map conflicted.",
+        NULL
+    },
+    {
+        SGX_ERROR_INVALID_METADATA,
+        "Invalid enclave metadata.",
+        NULL
+    },
+    {
+        SGX_ERROR_DEVICE_BUSY,
+        "SGX device was busy.",
+        NULL
+    },
+    {
+        SGX_ERROR_INVALID_VERSION,
+        "Enclave version was invalid.",
+        NULL
+    },
+    {
+        SGX_ERROR_INVALID_ATTRIBUTE,
+        "Enclave was not authorized.",
+        NULL
+    },
+    {
+        SGX_ERROR_ENCLAVE_FILE_ACCESS,
+        "Can't open enclave file.",
+        NULL
+    },
+};
+
+/* Check error conditions for loading enclave */
+void print_error_message(sgx_status_t ret)
+{
+    size_t idx = 0;
+    size_t ttl = sizeof sgx_errlist/sizeof sgx_errlist[0];
+
+    for (idx = 0; idx < ttl; idx++) {
+        if(ret == sgx_errlist[idx].err) {
+            if(NULL != sgx_errlist[idx].sug)
+                printf("Info: %s\n", sgx_errlist[idx].sug);
+            printf("Error: %s\n", sgx_errlist[idx].msg);
+            break;
+        }
+    }
+    
+    if (idx == ttl)
+    	printf("Error code is 0x%X. Please refer to the \"Intel SGX SDK Developer Reference\" for more details.\n", ret);
+}
+
+int initialize_enclave(char* token_path) {
+    FILE* sgx_token_file = NULL;
+    sgx_launch_token_t token = {0};
+    sgx_status_t ret;
+    int updated = 0;
+
+    if (token_path != NULL) {
+        sgx_token_file = fopen(token_path, "rb");
+    }
+
+    if(sgx_token_file == NULL){
+        if (errno != ENOENT && token_path != NULL) {
+            perror("Error opening sgx token file");
+            exit(1);
+        }
+    }else{
+        size_t read_num = fread(token, 1, sizeof(sgx_launch_token_t), sgx_token_file);
+        if (read_num != 0 && read_num != sizeof(sgx_launch_token_t)) {
+            fprintf(stderr, "sgx token file is corrupted");
+            return (1);
+        }
+    }
+
+    ret = sgx_create_enclave("enclave.signed.so", SGX_DEBUG_FLAG, &token, &updated, &global_eid, NULL);
+    if (ret != SGX_SUCCESS) {
+        print_error_message(ret);
+        return (1);
+    }
+
+    if (updated && token_path != NULL) {
+        sgx_token_file = freopen(token_path, "wb", sgx_token_file);
+        if(sgx_token_file == NULL){
+            perror("Error opening sgx token file");
+            return (1);
+        }
+        size_t write_num = fwrite(token, 1, sizeof(sgx_launch_token_t), sgx_token_file);
+        if (write_num != sizeof(sgx_launch_token_t)){
+            fprintf(stderr,"Warning: Failed to save launch token to \"%s\".\n", token_path);
+            return (1);
+        }
+    }
+    return (0);
+}
+
+sgx_enclave_id_t get_global_eid(void){
+    return global_eid;
+}