1 /* 2 * The Initial Developer of the Original Code is International 3 * Business Machines Corporation. Portions created by IBM 4 * Corporation are Copyright (C) 2005, 2006 International Business 5 * Machines Corporation. All Rights Reserved. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the Common Public License as published by 9 * IBM Corporation; either version 1 of the License, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * Common Public License for more details. 16 * 17 * You should have received a copy of the Common Public License 18 * along with this program; if not, a copy can be viewed at 19 * http://www.opensource.org/licenses/cpl1.0.php. 20 */ 21 #include <stdio.h> 22 #include <sys/types.h> 23 #include <sys/stat.h> 24 #include <fcntl.h> 25 #include <unistd.h> 26 #include <errno.h> 27 #include <string.h> 28 #include <netinet/in.h> 29 30 int main() { 31 32 char startup[] = { 33 0, 193, /* TPM_TAG_RQU_COMMAND */ 34 0, 0, 0, 12, /* length */ 35 0, 0, 0, 153, /* TPM_ORD_Startup */ 36 0, 1 /* ST_CLEAR */ 37 }; 38 39 char selftest[] = { 40 0, 193, /* TPM_TAG_RQU_COMMAND */ 41 0, 0, 0, 10, /* length */ 42 0, 0, 0, 80 /* TPM_ORD_SelfTestFull */ 43 }; 44 45 int fd; 46 int err; 47 int rc = 1; 48 49 fd = open( "/dev/tpm0", O_RDWR ); 50 if ( fd < 0 ) { 51 printf( "Unable to open the device.\n" ); 52 goto out_noclose; 53 } 54 55 err = write( fd, startup, sizeof(startup) ); 56 57 if ( err != sizeof( startup ) ){ 58 printf( "Error occured while writing the startup command: %d\n", errno ); 59 goto out; 60 } 61 62 err = read( fd, startup, sizeof(startup) ); 63 if ( err != 10 ) { 64 printf( "Error occured while reading the startup result: %d %d %s\n", err, errno, strerror(errno)); 65 goto out; 66 } 67 68 err = ntohl( *((uint32_t *)(startup+6)) ); 69 if ( err == 38 ) { 70 printf( "TPM already started.\n" ); 71 goto out; 72 } 73 74 if ( err != 0 ) { 75 printf( "TPM Error occured: %d\n", err ); 76 goto out; 77 } 78 79 rc = 0; 80 printf( "Startup successful\n" ); 81 82 out: 83 err = write( fd, selftest, sizeof(selftest) ); 84 85 if ( err != sizeof( selftest ) ){ 86 printf( "Error occured while writing the selftest command: %d\n", errno ); 87 goto out; 88 } 89 90 err = read( fd, selftest, sizeof(selftest) ); 91 if ( err != 10 ) { 92 printf( "Error occured while reading the selftest result: %d %d %s\n", err, errno, strerror(errno)); 93 goto out; 94 } 95 96 err = ntohl( *((uint32_t *)(selftest+6)) ); 97 if ( err != 0 ) { 98 printf( "TPM Error occured: %d\n", err ); 99 goto out; 100 } else { 101 rc = 0; 102 printf( "Selftest successful\n" ); 103 } 104 105 close(fd); 106 107 out_noclose: 108 return rc; 109 } 110 111