samplecode/sealeddata/app/app.c - incubator-teaclave-sgx-sdk - Git at Google

 /*
  * Copyright (C) 2011-2016 2017 Baidu, Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  *   * Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  *   * Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in
  *     the documentation and/or other materials provided with the
  *     distribution.
  *   * Neither the name of Baidu, Inc., nor the names of its
  *     contributors may be used to endorse or promote products derived
  *     from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
 #include <stdio.h>
 #include <string.h>
 #include <assert.h>

 #include <unistd.h>
 #include <pwd.h>
 #define MAX_PATH FILENAME_MAX

 #include "sgx_urts.h"
 #include "sgx_tseal.h"
 #include "app.h"
 #include "Enclave_u.h"


 sgx_enclave_id_t global_eid = 0;

 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: Unexpected error occurred.\n");
 }

 /* Initialize the enclave:
  *   Step 1: try to retrieve the launch token saved by last transaction
  *   Step 2: call sgx_create_enclave to initialize an enclave instance
  *   Step 3: save the launch token if it is updated
  */
 int initialize_enclave(void)
 {
     char token_path[MAX_PATH] = {'\0'};
     sgx_launch_token_t token = {0};
     sgx_status_t ret = SGX_ERROR_UNEXPECTED;
     int updated = 0;

     /* Step 1: try to retrieve the launch token saved by last transaction
      *         if there is no token, then create a new one.
      */
     /* try to get the token saved in $HOME */
     const char *home_dir = getpwuid(getuid())->pw_dir;

     if (home_dir != NULL &&
         (strlen(home_dir)+strlen("/")+sizeof(TOKEN_FILENAME)+1) <= MAX_PATH) {
         /* compose the token path */
         strncpy(token_path, home_dir, strlen(home_dir));
         strncat(token_path, "/", strlen("/"));
         strncat(token_path, TOKEN_FILENAME, sizeof(TOKEN_FILENAME)+1);
     } else {
         /* if token path is too long or $HOME is NULL */
         strncpy(token_path, TOKEN_FILENAME, sizeof(TOKEN_FILENAME));
     }

     FILE *fp = fopen(token_path, "rb");
     if (fp == NULL && (fp = fopen(token_path, "wb")) == NULL) {
         printf("Warning: Failed to create/open the launch token file \"%s\".\n", token_path);
     }

     if (fp != NULL) {
         /* read the token from saved file */
         size_t read_num = fread(token, 1, sizeof(sgx_launch_token_t), fp);
         if (read_num != 0 && read_num != sizeof(sgx_launch_token_t)) {
             /* if token is invalid, clear the buffer */
             memset(&token, 0x0, sizeof(sgx_launch_token_t));
             printf("Warning: Invalid launch token read from \"%s\".\n", token_path);
         }
     }
     /* Step 2: call sgx_create_enclave to initialize an enclave instance */
     /* Debug Support: set 2nd parameter to 1 */
     ret = sgx_create_enclave(ENCLAVE_FILENAME, SGX_DEBUG_FLAG, &token, &updated, &global_eid, NULL);
     if (ret != SGX_SUCCESS) {
         print_error_message(ret);
         if (fp != NULL) fclose(fp);
         return -1;
     }
     printf("global_eid: %ld\n", global_eid);

     /* Step 3: save the launch token if it is updated */
     if (updated == FALSE || fp == NULL) {
         /* if the token is not updated, or file handler is invalid, do not perform saving */
         if (fp != NULL) fclose(fp);
         return 0;
     }

     /* reopen the file with write capablity */
     fp = freopen(token_path, "wb", fp);
     if (fp == NULL) return 0;
     size_t write_num = fwrite(token, 1, sizeof(sgx_launch_token_t), fp);
     if (write_num != sizeof(sgx_launch_token_t))
         printf("Warning: Failed to save launch token to \"%s\".\n", token_path);
     fclose(fp);
     return 0;
 }

 /* Application entry */
 int SGX_CDECL main(int argc, char *argv[])
 {
 	sgx_status_t sgx_ret = SGX_SUCCESS;
 	sgx_status_t enclave_ret = SGX_SUCCESS;
 	uint32_t sealed_log_size = 1024;
 	uint8_t sealed_log[1024] = {0};
     sgx_sealed_data_t * sealed_data = 0;

     (void)(argc);
     (void)(argv);

     /* Initialize the enclave */
     if(initialize_enclave() < 0){
         printf("Enter a character before exit ...\n");
         getchar();
         return -1;
     }

  	sgx_ret = create_sealeddata(global_eid, &enclave_ret, sealed_log, sealed_log_size);
  	if(sgx_ret != SGX_SUCCESS) {
         print_error_message(sgx_ret);
         return -1;
     }
     if(enclave_ret != SGX_SUCCESS) {
         print_error_message(enclave_ret);
         return -1;
     }
     printf("create_sealeddata success ...\n");

     sealed_data = (sgx_sealed_data_t *)sealed_log;
     printf("sealed_data.key_request.key_name 0x%x\n", sealed_data->key_request.key_name);
     printf("sealed_data.key_request.key_policy 0x%x\n", sealed_data->key_request.key_policy);
     printf("sealed_data.plain_text_offset 0x%x\n", sealed_data->plain_text_offset);
     printf("sealed_data.aes_data.payload_size 0x%x\n", sealed_data->aes_data.payload_size);

     sgx_ret = verify_sealeddata(global_eid, &enclave_ret, sealed_log, sealed_log_size);
     if(sgx_ret != SGX_SUCCESS) {
         print_error_message(sgx_ret);
         return -1;
     }
     if(enclave_ret != SGX_SUCCESS) {
         print_error_message(sgx_ret);
         return -1;
     }

     printf("verify_sealeddata success ...\n");

     /* Destroy the enclave */
     sgx_destroy_enclave(global_eid);

     printf("Enter a character before exit ...\n");
     getchar();
     return 0;
 }

 void ocall_print_string(const char *str, size_t len)
 {
     char * string = (char *)malloc(len + (size_t)sizeof(char));
     if (string == NULL) {
     	printf("malloc failed\n");
     	return;
     }

     memcpy(string, str, len);
     char * ptr = string + len;
     * ptr = 0;
     printf("%s\n", string);
     free(string);
 }
	/*
	* Copyright (C) 2011-2016 2017 Baidu, Inc. All Rights Reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	*
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in
	* the documentation and/or other materials provided with the
	* distribution.
	* * Neither the name of Baidu, Inc., nor the names of its
	* contributors may be used to endorse or promote products derived
	* from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*
	*/
	#include <stdio.h>
	#include <string.h>
	#include <assert.h>

	#include <unistd.h>
	#include <pwd.h>
	#define MAX_PATH FILENAME_MAX

	#include "sgx_urts.h"
	#include "sgx_tseal.h"
	#include "app.h"
	#include "Enclave_u.h"


	sgx_enclave_id_t global_eid = 0;

	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: Unexpected error occurred.\n");
	}

	/* Initialize the enclave:
	* Step 1: try to retrieve the launch token saved by last transaction
	* Step 2: call sgx_create_enclave to initialize an enclave instance
	* Step 3: save the launch token if it is updated
	*/
	int initialize_enclave(void)
	{
	char token_path[MAX_PATH] = {'\0'};
	sgx_launch_token_t token = {0};
	sgx_status_t ret = SGX_ERROR_UNEXPECTED;
	int updated = 0;

	/* Step 1: try to retrieve the launch token saved by last transaction
	* if there is no token, then create a new one.
	*/
	/* try to get the token saved in $HOME */
	const char *home_dir = getpwuid(getuid())->pw_dir;

	if (home_dir != NULL &&
	(strlen(home_dir)+strlen("/")+sizeof(TOKEN_FILENAME)+1) <= MAX_PATH) {
	/* compose the token path */
	strncpy(token_path, home_dir, strlen(home_dir));
	strncat(token_path, "/", strlen("/"));
	strncat(token_path, TOKEN_FILENAME, sizeof(TOKEN_FILENAME)+1);
	} else {
	/* if token path is too long or $HOME is NULL */
	strncpy(token_path, TOKEN_FILENAME, sizeof(TOKEN_FILENAME));
	}

	FILE *fp = fopen(token_path, "rb");
	if (fp == NULL && (fp = fopen(token_path, "wb")) == NULL) {
	printf("Warning: Failed to create/open the launch token file \"%s\".\n", token_path);
	}

	if (fp != NULL) {
	/* read the token from saved file */
	size_t read_num = fread(token, 1, sizeof(sgx_launch_token_t), fp);
	if (read_num != 0 && read_num != sizeof(sgx_launch_token_t)) {
	/* if token is invalid, clear the buffer */
	memset(&token, 0x0, sizeof(sgx_launch_token_t));
	printf("Warning: Invalid launch token read from \"%s\".\n", token_path);
	}
	}
	/* Step 2: call sgx_create_enclave to initialize an enclave instance */
	/* Debug Support: set 2nd parameter to 1 */
	ret = sgx_create_enclave(ENCLAVE_FILENAME, SGX_DEBUG_FLAG, &token, &updated, &global_eid, NULL);
	if (ret != SGX_SUCCESS) {
	print_error_message(ret);
	if (fp != NULL) fclose(fp);
	return -1;
	}
	printf("global_eid: %ld\n", global_eid);

	/* Step 3: save the launch token if it is updated */
	if (updated == FALSE \|\| fp == NULL) {
	/* if the token is not updated, or file handler is invalid, do not perform saving */
	if (fp != NULL) fclose(fp);
	return 0;
	}

	/* reopen the file with write capablity */
	fp = freopen(token_path, "wb", fp);
	if (fp == NULL) return 0;
	size_t write_num = fwrite(token, 1, sizeof(sgx_launch_token_t), fp);
	if (write_num != sizeof(sgx_launch_token_t))
	printf("Warning: Failed to save launch token to \"%s\".\n", token_path);
	fclose(fp);
	return 0;
	}

	/* Application entry */
	int SGX_CDECL main(int argc, char *argv[])
	{
	sgx_status_t sgx_ret = SGX_SUCCESS;
	sgx_status_t enclave_ret = SGX_SUCCESS;
	uint32_t sealed_log_size = 1024;
	uint8_t sealed_log[1024] = {0};
	sgx_sealed_data_t * sealed_data = 0;

	(void)(argc);
	(void)(argv);

	/* Initialize the enclave */
	if(initialize_enclave() < 0){
	printf("Enter a character before exit ...\n");
	getchar();
	return -1;
	}

	sgx_ret = create_sealeddata(global_eid, &enclave_ret, sealed_log, sealed_log_size);
	if(sgx_ret != SGX_SUCCESS) {
	print_error_message(sgx_ret);
	return -1;
	}
	if(enclave_ret != SGX_SUCCESS) {
	print_error_message(enclave_ret);
	return -1;
	}
	printf("create_sealeddata success ...\n");

	sealed_data = (sgx_sealed_data_t *)sealed_log;
	printf("sealed_data.key_request.key_name 0x%x\n", sealed_data->key_request.key_name);
	printf("sealed_data.key_request.key_policy 0x%x\n", sealed_data->key_request.key_policy);
	printf("sealed_data.plain_text_offset 0x%x\n", sealed_data->plain_text_offset);
	printf("sealed_data.aes_data.payload_size 0x%x\n", sealed_data->aes_data.payload_size);

	sgx_ret = verify_sealeddata(global_eid, &enclave_ret, sealed_log, sealed_log_size);
	if(sgx_ret != SGX_SUCCESS) {
	print_error_message(sgx_ret);
	return -1;
	}
	if(enclave_ret != SGX_SUCCESS) {
	print_error_message(sgx_ret);
	return -1;
	}

	printf("verify_sealeddata success ...\n");

	/* Destroy the enclave */
	sgx_destroy_enclave(global_eid);

	printf("Enter a character before exit ...\n");
	getchar();
	return 0;
	}

	void ocall_print_string(const char *str, size_t len)
	{
	char * string = (char *)malloc(len + (size_t)sizeof(char));
	if (string == NULL) {
	printf("malloc failed\n");
	return;
	}

	memcpy(string, str, len);
	char * ptr = string + len;
	* ptr = 0;
	printf("%s\n", string);
	free(string);
	}