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89a4d6b1 PW |
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 | * | |
1a459660 | 14 | * SPDX-License-Identifier: GPL-2.0+ |
89a4d6b1 PW |
15 | */ |
16 | ||
f86ed6a8 | 17 | #include "imagetool.h" |
6bf4ca07 | 18 | #include "fit_common.h" |
89a4d6b1 PW |
19 | #include "mkimage.h" |
20 | #include <image.h> | |
21 | #include <u-boot/crc.h> | |
22 | ||
23 | static image_header_t header; | |
24 | ||
a9468115 SG |
25 | static int fit_add_file_data(struct image_tool_params *params, size_t size_inc, |
26 | const char *tmpfile) | |
27 | { | |
28 | int tfd, destfd = 0; | |
29 | void *dest_blob = NULL; | |
30 | off_t destfd_size = 0; | |
31 | struct stat sbuf; | |
32 | void *ptr; | |
33 | int ret = 0; | |
34 | ||
35 | tfd = mmap_fdt(params->cmdname, tmpfile, size_inc, &ptr, &sbuf, true); | |
36 | if (tfd < 0) | |
37 | return -EIO; | |
38 | ||
39 | if (params->keydest) { | |
40 | struct stat dest_sbuf; | |
41 | ||
42 | destfd = mmap_fdt(params->cmdname, params->keydest, size_inc, | |
43 | &dest_blob, &dest_sbuf, false); | |
44 | if (destfd < 0) { | |
45 | ret = -EIO; | |
46 | goto err_keydest; | |
47 | } | |
48 | destfd_size = dest_sbuf.st_size; | |
49 | } | |
50 | ||
51 | /* for first image creation, add a timestamp at offset 0 i.e., root */ | |
52 | if (params->datafile) | |
53 | ret = fit_set_timestamp(ptr, 0, sbuf.st_mtime); | |
54 | ||
55 | if (!ret) { | |
56 | ret = fit_add_verification_data(params->keydir, dest_blob, ptr, | |
57 | params->comment, | |
58 | params->require_keys); | |
59 | } | |
60 | ||
61 | if (dest_blob) { | |
62 | munmap(dest_blob, destfd_size); | |
63 | close(destfd); | |
64 | } | |
65 | ||
66 | err_keydest: | |
67 | munmap(ptr, sbuf.st_size); | |
68 | close(tfd); | |
69 | ||
70 | return ret; | |
71 | } | |
72 | ||
89a4d6b1 PW |
73 | /** |
74 | * fit_handle_file - main FIT file processing function | |
75 | * | |
76 | * fit_handle_file() runs dtc to convert .its to .itb, includes | |
77 | * binary data, updates timestamp property and calculates hashes. | |
78 | * | |
79 | * datafile - .its file | |
80 | * imagefile - .itb file | |
81 | * | |
82 | * returns: | |
83 | * only on success, otherwise calls exit (EXIT_FAILURE); | |
84 | */ | |
f86ed6a8 | 85 | static int fit_handle_file(struct image_tool_params *params) |
89a4d6b1 PW |
86 | { |
87 | char tmpfile[MKIMAGE_MAX_TMPFILE_LEN]; | |
88 | char cmd[MKIMAGE_MAX_DTC_CMDLINE_LEN]; | |
a9468115 SG |
89 | size_t size_inc; |
90 | int ret; | |
89a4d6b1 PW |
91 | |
92 | /* Flattened Image Tree (FIT) format handling */ | |
93 | debug ("FIT format handling\n"); | |
94 | ||
95 | /* call dtc to include binary properties into the tmp file */ | |
96 | if (strlen (params->imagefile) + | |
97 | strlen (MKIMAGE_TMPFILE_SUFFIX) + 1 > sizeof (tmpfile)) { | |
98 | fprintf (stderr, "%s: Image file name (%s) too long, " | |
99 | "can't create tmpfile", | |
100 | params->imagefile, params->cmdname); | |
101 | return (EXIT_FAILURE); | |
102 | } | |
103 | sprintf (tmpfile, "%s%s", params->imagefile, MKIMAGE_TMPFILE_SUFFIX); | |
104 | ||
95d77b44 SG |
105 | /* We either compile the source file, or use the existing FIT image */ |
106 | if (params->datafile) { | |
107 | /* dtc -I dts -O dtb -p 500 datafile > tmpfile */ | |
108 | snprintf(cmd, sizeof(cmd), "%s %s %s > %s", | |
109 | MKIMAGE_DTC, params->dtc, params->datafile, tmpfile); | |
110 | debug("Trying to execute \"%s\"\n", cmd); | |
111 | } else { | |
112 | snprintf(cmd, sizeof(cmd), "cp %s %s", | |
113 | params->imagefile, tmpfile); | |
114 | } | |
89a4d6b1 PW |
115 | if (system (cmd) == -1) { |
116 | fprintf (stderr, "%s: system(%s) failed: %s\n", | |
117 | params->cmdname, cmd, strerror(errno)); | |
aa6d6db4 | 118 | goto err_system; |
89a4d6b1 PW |
119 | } |
120 | ||
a9468115 SG |
121 | /* |
122 | * Set hashes for images in the blob. Unfortunately we may need more | |
123 | * space in either FDT, so keep trying until we succeed. | |
124 | * | |
125 | * Note: this is pretty inefficient for signing, since we must | |
126 | * calculate the signature every time. It would be better to calculate | |
127 | * all the data and then store it in a separate step. However, this | |
128 | * would be considerably more complex to implement. Generally a few | |
129 | * steps of this loop is enough to sign with several keys. | |
130 | */ | |
131 | for (size_inc = 0; size_inc < 64 * 1024; size_inc += 1024) { | |
132 | ret = fit_add_file_data(params, size_inc, tmpfile); | |
133 | if (!ret || ret != -ENOSPC) | |
134 | break; | |
e29495d3 SG |
135 | } |
136 | ||
a9468115 | 137 | if (ret) { |
399c744b SG |
138 | fprintf(stderr, "%s Can't add hashes to FIT blob\n", |
139 | params->cmdname); | |
a9468115 | 140 | goto err_system; |
e29495d3 | 141 | } |
89a4d6b1 PW |
142 | |
143 | if (rename (tmpfile, params->imagefile) == -1) { | |
144 | fprintf (stderr, "%s: Can't rename %s to %s: %s\n", | |
145 | params->cmdname, tmpfile, params->imagefile, | |
146 | strerror (errno)); | |
147 | unlink (tmpfile); | |
148 | unlink (params->imagefile); | |
a9468115 | 149 | return EXIT_FAILURE; |
89a4d6b1 | 150 | } |
a9468115 | 151 | return EXIT_SUCCESS; |
aa6d6db4 | 152 | |
aa6d6db4 SG |
153 | err_system: |
154 | unlink(tmpfile); | |
155 | return -1; | |
89a4d6b1 PW |
156 | } |
157 | ||
f86ed6a8 | 158 | static int fit_check_params(struct image_tool_params *params) |
89a4d6b1 PW |
159 | { |
160 | return ((params->dflag && (params->fflag || params->lflag)) || | |
161 | (params->fflag && (params->dflag || params->lflag)) || | |
162 | (params->lflag && (params->dflag || params->fflag))); | |
163 | } | |
164 | ||
165 | static struct image_type_params fitimage_params = { | |
166 | .name = "FIT Image support", | |
167 | .header_size = sizeof(image_header_t), | |
168 | .hdr = (void*)&header, | |
169 | .verify_header = fit_verify_header, | |
170 | .print_header = fit_print_contents, | |
171 | .check_image_type = fit_check_image_types, | |
172 | .fflag_handle = fit_handle_file, | |
8e1c8966 | 173 | .set_header = NULL, /* FIT images use DTB header */ |
89a4d6b1 PW |
174 | .check_params = fit_check_params, |
175 | }; | |
176 | ||
177 | void init_fit_image_type (void) | |
178 | { | |
f86ed6a8 | 179 | register_image_type(&fitimage_params); |
89a4d6b1 | 180 | } |