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rockchip: mkimage: simplify start/size calculation for rc4_encode
[u-boot] / tools / default_image.c
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 "mkimage.h"
19
20 #include <image.h>
21 #include <u-boot/crc.h>
22
23 static image_header_t header;
24
25 static int image_check_image_types(uint8_t type)
26 {
27         if (((type > IH_TYPE_INVALID) && (type < IH_TYPE_FLATDT)) ||
28             (type == IH_TYPE_KERNEL_NOLOAD) || (type == IH_TYPE_FIRMWARE_IVT))
29                 return EXIT_SUCCESS;
30         else
31                 return EXIT_FAILURE;
32 }
33
34 static int image_check_params(struct image_tool_params *params)
35 {
36         return  ((params->dflag && (params->fflag || params->lflag)) ||
37                 (params->fflag && (params->dflag || params->lflag)) ||
38                 (params->lflag && (params->dflag || params->fflag)));
39 }
40
41 static int image_verify_header(unsigned char *ptr, int image_size,
42                         struct image_tool_params *params)
43 {
44         uint32_t len;
45         const unsigned char *data;
46         uint32_t checksum;
47         image_header_t header;
48         image_header_t *hdr = &header;
49
50         /*
51          * create copy of header so that we can blank out the
52          * checksum field for checking - this can't be done
53          * on the PROT_READ mapped data.
54          */
55         memcpy(hdr, ptr, sizeof(image_header_t));
56
57         if (be32_to_cpu(hdr->ih_magic) != IH_MAGIC) {
58                 debug("%s: Bad Magic Number: \"%s\" is no valid image\n",
59                       params->cmdname, params->imagefile);
60                 return -FDT_ERR_BADMAGIC;
61         }
62
63         data = (const unsigned char *)hdr;
64         len  = sizeof(image_header_t);
65
66         checksum = be32_to_cpu(hdr->ih_hcrc);
67         hdr->ih_hcrc = cpu_to_be32(0);  /* clear for re-calculation */
68
69         if (crc32(0, data, len) != checksum) {
70                 debug("%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                 debug("%s: ERROR: \"%s\" has corrupted data!\n",
81                       params->cmdname, params->imagefile);
82                 return -FDT_ERR_BADSTRUCTURE;
83         }
84         return 0;
85 }
86
87 static void image_set_header(void *ptr, struct stat *sbuf, int ifd,
88                                 struct image_tool_params *params)
89 {
90         uint32_t checksum;
91         time_t time;
92         uint32_t imagesize;
93
94         image_header_t * hdr = (image_header_t *)ptr;
95
96         checksum = crc32(0,
97                         (const unsigned char *)(ptr +
98                                 sizeof(image_header_t)),
99                         sbuf->st_size - sizeof(image_header_t));
100
101         time = imagetool_get_source_date(params, sbuf->st_mtime);
102         if (params->type == IH_TYPE_FIRMWARE_IVT)
103                 /* Add size of CSF minus IVT */
104                 imagesize = sbuf->st_size - sizeof(image_header_t) + 0x1FE0;
105         else
106                 imagesize = sbuf->st_size - sizeof(image_header_t);
107
108         /* Build new header */
109         image_set_magic(hdr, IH_MAGIC);
110         image_set_time(hdr, time);
111         image_set_size(hdr, imagesize);
112         image_set_load(hdr, params->addr);
113         image_set_ep(hdr, params->ep);
114         image_set_dcrc(hdr, checksum);
115         image_set_os(hdr, params->os);
116         image_set_arch(hdr, params->arch);
117         image_set_type(hdr, params->type);
118         image_set_comp(hdr, params->comp);
119
120         image_set_name(hdr, params->imagename);
121
122         checksum = crc32(0, (const unsigned char *)hdr,
123                                 sizeof(image_header_t));
124
125         image_set_hcrc(hdr, checksum);
126 }
127
128 static int image_extract_subimage(void *ptr, struct image_tool_params *params)
129 {
130         const image_header_t *hdr = (const image_header_t *)ptr;
131         ulong file_data;
132         ulong file_len;
133
134         if (image_check_type(hdr, IH_TYPE_MULTI)) {
135                 ulong idx = params->pflag;
136                 ulong count;
137
138                 /* get the number of data files present in the image */
139                 count = image_multi_count(hdr);
140
141                 /* retrieve the "data file" at the idx position */
142                 image_multi_getimg(hdr, idx, &file_data, &file_len);
143
144                 if ((file_len == 0) || (idx >= count)) {
145                         fprintf(stderr, "%s: No such data file %ld in \"%s\"\n",
146                                 params->cmdname, idx, params->imagefile);
147                         return -1;
148                 }
149         } else {
150                 file_data = image_get_data(hdr);
151                 file_len = image_get_size(hdr);
152         }
153
154         /* save the "data file" into the file system */
155         return imagetool_save_subimage(params->outfile, file_data, file_len);
156 }
157
158 /*
159  * Default image type parameters definition
160  */
161 U_BOOT_IMAGE_TYPE(
162         defimage,
163         "Default Image support",
164         sizeof(image_header_t),
165         (void *)&header,
166         image_check_params,
167         image_verify_header,
168         image_print_contents,
169         image_set_header,
170         image_extract_subimage,
171         image_check_image_types,
172         NULL,
173         NULL
174 );