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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 * default_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 "imagetool.h"
18 #include <image.h>
19 #include <u-boot/crc.h>
20
21 static image_header_t header;
22
23 static int image_check_image_types(uint8_t type)
24 {
25 if (((type > IH_TYPE_INVALID) && (type < IH_TYPE_FLATDT)) ||
26 (type == IH_TYPE_KERNEL_NOLOAD))
27 return EXIT_SUCCESS;
28 else
29 return EXIT_FAILURE;
30 }
31
32 static int image_check_params(struct image_tool_params *params)
33 {
34 return ((params->dflag && (params->fflag || params->lflag)) ||
35 (params->fflag && (params->dflag || params->lflag)) ||
36 (params->lflag && (params->dflag || params->fflag)));
37 }
38
39 static int image_verify_header(unsigned char *ptr, int image_size,
40 struct image_tool_params *params)
41 {
42 uint32_t len;
43 const unsigned char *data;
44 uint32_t checksum;
45 image_header_t header;
46 image_header_t *hdr = &header;
47
48 /*
49 * create copy of header so that we can blank out the
50 * checksum field for checking - this can't be done
51 * on the PROT_READ mapped data.
52 */
53 memcpy(hdr, ptr, sizeof(image_header_t));
54
55 if (be32_to_cpu(hdr->ih_magic) != IH_MAGIC) {
56 fprintf(stderr,
57 "%s: Bad Magic Number: \"%s\" is no valid image\n",
58 params->cmdname, params->imagefile);
59 return -FDT_ERR_BADMAGIC;
60 }
61
62 data = (const unsigned char *)hdr;
63 len = sizeof(image_header_t);
64
65 checksum = be32_to_cpu(hdr->ih_hcrc);
66 hdr->ih_hcrc = cpu_to_be32(0); /* clear for re-calculation */
67
68 if (crc32(0, data, len) != checksum) {
69 fprintf(stderr,
70 "%s: ERROR: \"%s\" has bad header checksum!\n",
71 params->cmdname, params->imagefile);
72 return -FDT_ERR_BADSTATE;
73 }
74
75 data = (const unsigned char *)ptr + sizeof(image_header_t);
76 len = image_size - sizeof(image_header_t) ;
77
78 checksum = be32_to_cpu(hdr->ih_dcrc);
79 if (crc32(0, data, len) != checksum) {
80 fprintf(stderr,
81 "%s: ERROR: \"%s\" has corrupted data!\n",
82 params->cmdname, params->imagefile);
83 return -FDT_ERR_BADSTRUCTURE;
84 }
85 return 0;
86 }
87
88 static void image_set_header(void *ptr, struct stat *sbuf, int ifd,
89 struct image_tool_params *params)
90 {
91 uint32_t checksum;
92
93 image_header_t * hdr = (image_header_t *)ptr;
94
95 checksum = crc32(0,
96 (const unsigned char *)(ptr +
97 sizeof(image_header_t)),
98 sbuf->st_size - sizeof(image_header_t));
99
100 /* Build new header */
101 image_set_magic(hdr, IH_MAGIC);
102 image_set_time(hdr, sbuf->st_mtime);
103 image_set_size(hdr, sbuf->st_size - sizeof(image_header_t));
104 image_set_load(hdr, params->addr);
105 image_set_ep(hdr, params->ep);
106 image_set_dcrc(hdr, checksum);
107 image_set_os(hdr, params->os);
108 image_set_arch(hdr, params->arch);
109 image_set_type(hdr, params->type);
110 image_set_comp(hdr, params->comp);
111
112 image_set_name(hdr, params->imagename);
113
114 checksum = crc32(0, (const unsigned char *)hdr,
115 sizeof(image_header_t));
116
117 image_set_hcrc(hdr, checksum);
118 }
119
120 static int image_save_datafile(struct image_tool_params *params,
121 ulong file_data, ulong file_len)
122 {
123 int dfd;
124 const char *datafile = params->outfile;
125
126 dfd = open(datafile, O_RDWR | O_CREAT | O_TRUNC | O_BINARY,
127 S_IRUSR | S_IWUSR);
128 if (dfd < 0) {
129 fprintf(stderr, "%s: Can't open \"%s\": %s\n",
130 params->cmdname, datafile, strerror(errno));
131 return -1;
132 }
133
134 if (write(dfd, (void *)file_data, file_len) != (ssize_t)file_len) {
135 fprintf(stderr, "%s: Write error on \"%s\": %s\n",
136 params->cmdname, datafile, strerror(errno));
137 close(dfd);
138 return -1;
139 }
140
141 close(dfd);
142
143 return 0;
144 }
145
146 static int image_extract_datafile(void *ptr, struct image_tool_params *params)
147 {
148 const image_header_t *hdr = (const image_header_t *)ptr;
149 ulong file_data;
150 ulong file_len;
151
152 if (image_check_type(hdr, IH_TYPE_MULTI)) {
153 ulong idx = params->pflag;
154 ulong count;
155
156 /* get the number of data files present in the image */
157 count = image_multi_count(hdr);
158
159 /* retrieve the "data file" at the idx position */
160 image_multi_getimg(hdr, idx, &file_data, &file_len);
161
162 if ((file_len == 0) || (idx >= count)) {
163 fprintf(stderr, "%s: No such data file %ld in \"%s\"\n",
164 params->cmdname, idx, params->imagefile);
165 return -1;
166 }
167 } else {
168 file_data = image_get_data(hdr);
169 file_len = image_get_size(hdr);
170 }
171
172 /* save the "data file" into the file system */
173 return image_save_datafile(params, file_data, file_len);
174 }
175
176 /*
177 * Default image type parameters definition
178 */
179 static struct image_type_params defimage_params = {
180 .name = "Default Image support",
181 .header_size = sizeof(image_header_t),
182 .hdr = (void*)&header,
183 .check_image_type = image_check_image_types,
184 .verify_header = image_verify_header,
185 .print_header = image_print_contents,
186 .set_header = image_set_header,
187 .extract_datafile = image_extract_datafile,
188 .check_params = image_check_params,
189 };
190
191 void init_default_image_type(void)
192 {
193 register_image_type(&defimage_params);
194 }