diff options
Diffstat (limited to 'utils/samsungtools/samsung.c')
-rw-r--r-- | utils/samsungtools/samsung.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/utils/samsungtools/samsung.c b/utils/samsungtools/samsung.c new file mode 100644 index 0000000000..decf34f208 --- /dev/null +++ b/utils/samsungtools/samsung.c | |||
@@ -0,0 +1,127 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2012 Amaury Pouly | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | #include "samsung.h" | ||
22 | #include <openssl/md5.h> | ||
23 | #include <string.h> | ||
24 | #include <stdlib.h> | ||
25 | |||
26 | #ifndef MIN | ||
27 | #define MIN(a,b) ((a) < (b) ? (a) : (b)) | ||
28 | #endif | ||
29 | |||
30 | static uint8_t g_yp_key[128] = | ||
31 | { | ||
32 | 0xa3, 0x04, 0xb9, 0xcd, 0x34, 0x13, 0x4a, 0x19, 0x19, 0x35, 0xdf, 0xbb, 0x8f, 0x3d, 0x7f, 0x09, | ||
33 | 0x42, 0x3c, 0x96, 0xc6, 0x41, 0xa9, 0x95, 0xf1, 0xd0, 0xac, 0x16, 0x37, 0x57, 0x1f, 0x28, 0xe7, | ||
34 | 0x0b, 0xc2, 0x12, 0x09, 0x39, 0x42, 0xd2, 0x96, 0xf5, 0x00, 0xd2, 0x23, 0xa4, 0x24, 0xe2, 0x8e, | ||
35 | 0x50, 0x3c, 0x6e, 0x23, 0xeb, 0x68, 0xed, 0x31, 0xb7, 0xee, 0xc0, 0xc7, 0x09, 0xf8, 0x0e, 0x9d, | ||
36 | 0x51, 0xed, 0x17, 0x95, 0x64, 0x09, 0xe0, 0xf9, 0xf0, 0xef, 0x86, 0xc0, 0x04, 0x46, 0x89, 0x8a, | ||
37 | 0x6e, 0x27, 0x69, 0xde, 0xc7, 0x9d, 0x1e, 0xee, 0x3c, 0x3f, 0x17, 0x05, 0x44, 0xbb, 0xbb, 0x1d, | ||
38 | 0x3d, 0x5d, 0x6e, 0xf2, 0xcf, 0x15, 0xd6, 0x3c, 0xcc, 0x7d, 0x67, 0x1a, 0xb8, 0xd2, 0x1b, 0x54, | ||
39 | 0x97, 0xa2, 0x58, 0x58, 0xf7, 0x4e, 0x5e, 0x50, 0x42, 0x69, 0xdc, 0xe7, 0x3a, 0x87, 0x2e, 0x22 | ||
40 | }; | ||
41 | |||
42 | static void cyclic_xor(void *data, int datasize, void *xor, int xorsize) | ||
43 | { | ||
44 | for(int i = 0; i < datasize; i++) | ||
45 | *(uint8_t *)(data + i) ^= *(uint8_t *)(xor + (i % xorsize)); | ||
46 | } | ||
47 | |||
48 | struct samsung_firmware_t *samsung_read(samsung_read_t read, | ||
49 | samsung_printf_t printf, void *user, enum samsung_error_t *err) | ||
50 | { | ||
51 | struct yp_header_t yp_hdr; | ||
52 | struct yp_md5_t yp_md5; | ||
53 | |||
54 | /* read and check header */ | ||
55 | if(read(user, 0, &yp_hdr, sizeof(yp_hdr)) != sizeof(yp_hdr)) | ||
56 | { | ||
57 | printf(user, true, "Cannot read YP header\n"); | ||
58 | *err = SAMSUNG_READ_ERROR; | ||
59 | return NULL; | ||
60 | } | ||
61 | if(strncmp(yp_hdr.signature, YP_SIGNATURE, sizeof(yp_hdr.signature)) != 0) | ||
62 | { | ||
63 | printf(user, true, "Bad YP signature\n"); | ||
64 | *err = SAMSUNG_FORMAT_ERROR; | ||
65 | return NULL; | ||
66 | } | ||
67 | |||
68 | printf(user, false, "Model: %s\n", yp_hdr.model); | ||
69 | printf(user, false, "Version: %s %s %s\n", yp_hdr.version, yp_hdr.region, yp_hdr.extra); | ||
70 | |||
71 | /* allocate and read data */ | ||
72 | struct samsung_firmware_t *fw = malloc(sizeof(struct samsung_firmware_t)); | ||
73 | memset(fw, 0, sizeof(struct samsung_firmware_t)); | ||
74 | fw->data_size = yp_hdr.datasize; | ||
75 | fw->data = malloc(fw->data_size); | ||
76 | strncpy(fw->version, yp_hdr.version, sizeof(yp_hdr.version)); | ||
77 | strncpy(fw->region, yp_hdr.region, sizeof(yp_hdr.region)); | ||
78 | strncpy(fw->extra, yp_hdr.extra, sizeof(yp_hdr.extra)); | ||
79 | strncpy(fw->model, yp_hdr.model, sizeof(yp_hdr.model)); | ||
80 | |||
81 | if(read(user, sizeof(yp_hdr), fw->data, fw->data_size) != fw->data_size) | ||
82 | { | ||
83 | printf(user, true, "Cannot read data\n"); | ||
84 | *err = SAMSUNG_READ_ERROR; | ||
85 | samsung_free(fw); | ||
86 | return NULL; | ||
87 | } | ||
88 | |||
89 | /* read and check MD5 */ | ||
90 | if(read(user, yp_hdr.datasize + sizeof(yp_hdr), &yp_md5, sizeof(yp_md5)) != sizeof(yp_md5)) | ||
91 | { | ||
92 | printf(user, true, "Cannot read MD5 sum\n"); | ||
93 | *err = SAMSUNG_READ_ERROR; | ||
94 | samsung_free(fw); | ||
95 | return NULL; | ||
96 | } | ||
97 | |||
98 | uint8_t actual_md5[MD5_DIGEST_LENGTH]; | ||
99 | MD5_CTX c; | ||
100 | MD5_Init(&c); | ||
101 | MD5_Update(&c, fw->data, fw->data_size); | ||
102 | MD5_Final(actual_md5, &c); | ||
103 | |||
104 | if(memcmp(actual_md5, yp_md5.md5, MD5_DIGEST_LENGTH) != 0) | ||
105 | { | ||
106 | printf(user, true, "MD5 mismatch\n"); | ||
107 | *err = SAMSUNG_MD5_ERROR; | ||
108 | samsung_free(fw); | ||
109 | return NULL; | ||
110 | } | ||
111 | |||
112 | /* decrypt */ | ||
113 | cyclic_xor(fw->data, fw->data_size, g_yp_key, sizeof(g_yp_key)); | ||
114 | |||
115 | /* success ! */ | ||
116 | *err = SAMSUNG_SUCCESS; | ||
117 | return fw; | ||
118 | } | ||
119 | |||
120 | void samsung_free(struct samsung_firmware_t *fw) | ||
121 | { | ||
122 | if(fw) | ||
123 | { | ||
124 | free(fw->data); | ||
125 | free(fw); | ||
126 | } | ||
127 | } | ||