1 /* 2 * (C) Copyright 2008 Semihalf 3 * 4 * (C) Copyright 2000-2004 5 * DENX Software Engineering 6 * Wolfgang Denk, wd@denx.de 7 * 8 * Updated-by: Prafulla Wadaskar <prafulla@marvell.com> 9 * FIT image specific code abstracted from mkimage.c 10 * some functions added to address abstraction 11 * 12 * All rights reserved. 13 * 14 * SPDX-License-Identifier: GPL-2.0+ 15 */ 16 17 #include "mkimage.h" 18 #include <image.h> 19 #include <u-boot/crc.h> 20 21 static image_header_t header; 22 23 static int fit_verify_header (unsigned char *ptr, int image_size, 24 struct mkimage_params *params) 25 { 26 return fdt_check_header ((void *)ptr); 27 } 28 29 static int fit_check_image_types (uint8_t type) 30 { 31 if (type == IH_TYPE_FLATDT) 32 return EXIT_SUCCESS; 33 else 34 return EXIT_FAILURE; 35 } 36 37 int mmap_fdt(struct mkimage_params *params, const char *fname, void **blobp, 38 struct stat *sbuf) 39 { 40 void *ptr; 41 int fd; 42 43 /* Load FIT blob into memory (we need to write hashes/signatures) */ 44 fd = open(fname, O_RDWR | O_BINARY); 45 46 if (fd < 0) { 47 fprintf(stderr, "%s: Can't open %s: %s\n", 48 params->cmdname, fname, strerror(errno)); 49 unlink(fname); 50 return -1; 51 } 52 53 if (fstat(fd, sbuf) < 0) { 54 fprintf(stderr, "%s: Can't stat %s: %s\n", 55 params->cmdname, fname, strerror(errno)); 56 unlink(fname); 57 return -1; 58 } 59 60 ptr = mmap(0, sbuf->st_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); 61 if (ptr == MAP_FAILED) { 62 fprintf(stderr, "%s: Can't read %s: %s\n", 63 params->cmdname, fname, strerror(errno)); 64 unlink(fname); 65 return -1; 66 } 67 68 /* check if ptr has a valid blob */ 69 if (fdt_check_header(ptr)) { 70 fprintf(stderr, "%s: Invalid FIT blob\n", params->cmdname); 71 unlink(fname); 72 return -1; 73 } 74 75 *blobp = ptr; 76 return fd; 77 } 78 79 /** 80 * fit_handle_file - main FIT file processing function 81 * 82 * fit_handle_file() runs dtc to convert .its to .itb, includes 83 * binary data, updates timestamp property and calculates hashes. 84 * 85 * datafile - .its file 86 * imagefile - .itb file 87 * 88 * returns: 89 * only on success, otherwise calls exit (EXIT_FAILURE); 90 */ 91 static int fit_handle_file (struct mkimage_params *params) 92 { 93 char tmpfile[MKIMAGE_MAX_TMPFILE_LEN]; 94 char cmd[MKIMAGE_MAX_DTC_CMDLINE_LEN]; 95 int tfd, destfd = 0; 96 void *dest_blob = NULL; 97 struct stat sbuf; 98 void *ptr; 99 off_t destfd_size = 0; 100 101 /* Flattened Image Tree (FIT) format handling */ 102 debug ("FIT format handling\n"); 103 104 /* call dtc to include binary properties into the tmp file */ 105 if (strlen (params->imagefile) + 106 strlen (MKIMAGE_TMPFILE_SUFFIX) + 1 > sizeof (tmpfile)) { 107 fprintf (stderr, "%s: Image file name (%s) too long, " 108 "can't create tmpfile", 109 params->imagefile, params->cmdname); 110 return (EXIT_FAILURE); 111 } 112 sprintf (tmpfile, "%s%s", params->imagefile, MKIMAGE_TMPFILE_SUFFIX); 113 114 /* We either compile the source file, or use the existing FIT image */ 115 if (params->datafile) { 116 /* dtc -I dts -O dtb -p 500 datafile > tmpfile */ 117 snprintf(cmd, sizeof(cmd), "%s %s %s > %s", 118 MKIMAGE_DTC, params->dtc, params->datafile, tmpfile); 119 debug("Trying to execute \"%s\"\n", cmd); 120 } else { 121 snprintf(cmd, sizeof(cmd), "cp %s %s", 122 params->imagefile, tmpfile); 123 } 124 if (system (cmd) == -1) { 125 fprintf (stderr, "%s: system(%s) failed: %s\n", 126 params->cmdname, cmd, strerror(errno)); 127 goto err_system; 128 } 129 130 if (params->keydest) { 131 destfd = mmap_fdt(params, params->keydest, &dest_blob, &sbuf); 132 if (destfd < 0) 133 goto err_keydest; 134 destfd_size = sbuf.st_size; 135 } 136 137 tfd = mmap_fdt(params, tmpfile, &ptr, &sbuf); 138 if (tfd < 0) 139 goto err_mmap; 140 141 /* set hashes for images in the blob */ 142 if (fit_add_verification_data(params->keydir, 143 dest_blob, ptr, params->comment, 144 params->require_keys)) { 145 fprintf(stderr, "%s Can't add hashes to FIT blob\n", 146 params->cmdname); 147 goto err_add_hashes; 148 } 149 150 /* for first image creation, add a timestamp at offset 0 i.e., root */ 151 if (params->datafile && fit_set_timestamp(ptr, 0, sbuf.st_mtime)) { 152 fprintf (stderr, "%s: Can't add image timestamp\n", 153 params->cmdname); 154 goto err_add_timestamp; 155 } 156 debug ("Added timestamp successfully\n"); 157 158 munmap ((void *)ptr, sbuf.st_size); 159 close (tfd); 160 if (dest_blob) { 161 munmap(dest_blob, destfd_size); 162 close(destfd); 163 } 164 165 if (rename (tmpfile, params->imagefile) == -1) { 166 fprintf (stderr, "%s: Can't rename %s to %s: %s\n", 167 params->cmdname, tmpfile, params->imagefile, 168 strerror (errno)); 169 unlink (tmpfile); 170 unlink (params->imagefile); 171 return (EXIT_FAILURE); 172 } 173 return (EXIT_SUCCESS); 174 175 err_add_timestamp: 176 err_add_hashes: 177 munmap(ptr, sbuf.st_size); 178 err_mmap: 179 if (dest_blob) 180 munmap(dest_blob, destfd_size); 181 err_keydest: 182 err_system: 183 unlink(tmpfile); 184 return -1; 185 } 186 187 static int fit_check_params (struct mkimage_params *params) 188 { 189 return ((params->dflag && (params->fflag || params->lflag)) || 190 (params->fflag && (params->dflag || params->lflag)) || 191 (params->lflag && (params->dflag || params->fflag))); 192 } 193 194 static struct image_type_params fitimage_params = { 195 .name = "FIT Image support", 196 .header_size = sizeof(image_header_t), 197 .hdr = (void*)&header, 198 .verify_header = fit_verify_header, 199 .print_header = fit_print_contents, 200 .check_image_type = fit_check_image_types, 201 .fflag_handle = fit_handle_file, 202 .set_header = NULL, /* FIT images use DTB header */ 203 .check_params = fit_check_params, 204 }; 205 206 void init_fit_image_type (void) 207 { 208 mkimage_register (&fitimage_params); 209 } 210