GCC Code Coverage Report

Directory: ./
Coverage: low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%
Coverage Exec / Excl / Total
Lines: 77.8% 165 / 0 / 212
Functions: 100.0% 10 / 0 / 10
Branches: 59.2% 84 / 0 / 142
libfprint/drivers/goodixmoc/goodix_proto.c
Line Branch Exec Source
1 /*
2 * Goodix Moc driver for libfprint
3 * Copyright (C) 2019 Shenzhen Goodix Technology Co., Ltd.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 #include <glib.h>
21 #include <stdint.h>
22
23 #include "goodix_proto.h"
24
25 /*
26 * Crc functions
27 */
28
29 #define WIDTH (8 * sizeof (uint32_t))
30 #define FINAL_XOR_VALUE 0xFFFFFFFF
31 #define REFLECT_DATA(X) ((uint8_t) reflect ((X), 8))
32 #define REFLECT_REMAINDER(X) ((unsigned int) reflect ((X), WIDTH))
33
34
35 uint8_t
36 63 gx_proto_crc8_calc (uint8_t *lubp_date, uint32_t lui_len)
37 {
38 63 const uint8_t *data = lubp_date;
39 63 unsigned int crc = 0;
40 63 int i, j;
41
42
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 441 for (j = lui_len; j; j--, data++)
43 {
44 378 crc ^= (*data << 8);
45
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 3402 for (i = 8; i; i--)
46 {
47
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 3024 if (crc & 0x8000)
48 1428 crc ^= (0x1070 << 3);
49 3024 crc <<= 1;
50 }
51 }
52
53 63 crc >>= 8;
54 63 crc = ~crc;
55 63 return (uint8_t) crc;
56 }
57
58 typedef struct
59 {
60 uint32_t crc;
61 } gf_crc32_context;
62
63 static uint32_t s_crc_table[256] =
64 { 0x0, 0x4c11db7, 0x9823b6e, 0xd4326d9, 0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005,
65 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd,
66 0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
67 0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd,
68 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039, 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,
69 0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
70 0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95,
71 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1, 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d,
72 0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
73 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x18aeb13, 0x54bf6a4, 0x808d07d, 0xcc9cdca,
74 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde, 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02,
75 0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
76 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692,
77 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6, 0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a,
78 0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
79 0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a,
80 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637, 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb,
81 0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
82 0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b,
83 0x315d626, 0x7d4cb91, 0xa97ed48, 0xe56f0ff, 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623,
84 0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
85 0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3,
86 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7, 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b,
87 0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
88 0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c,
89 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8, 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24,
90 0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30, 0x29f3d35, 0x65e2082, 0xb1d065b, 0xfdc1bec,
91 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654,
92 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0, 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c,
93 0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
94 0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c,
95 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668, 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4};
96
97 static uint32_t
98 4317 reflect (uint32_t data, uint8_t n_bits)
99 {
100 4317 unsigned long reflection = 0x00000000;
101 4317 uint8_t bit;
102
103 /*
104 * Reflect the data about the center bit.
105 */
106
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 43413 for (bit = 0; bit < n_bits; ++bit)
107 {
108 /*
109 * If the LSB bit is set, set the reflection of it.
110 */
111
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 39096 if (data & 0x01)
112 9153 reflection |= (1LU << ((n_bits - 1) - bit));
113
114 39096 data = (data >> 1);
115 }
116
117 4317 return reflection;
118
119 }
120
121 static void
122 190 crc32_init (gf_crc32_context *ctx)
123 {
124 190 ctx->crc = 0xFFFFFFFF;
125 }
126
127 static void
128 190 crc32_update (gf_crc32_context *ctx, const uint8_t *message, uint32_t n_bytes)
129 {
130 190 uint8_t data;
131 190 uint32_t byte;
132
133 /*
134 * Divide the message by the polynomial, a byte at a time.
135 */
136
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 4317 for (byte = 0; byte < n_bytes; ++byte)
137 {
138 4127 data = REFLECT_DATA (message[byte]) ^ (ctx->crc >> (WIDTH - 8));
139 4127 ctx->crc = s_crc_table[data] ^ (ctx->crc << 8);
140 }
141 190 }
142
143 static void
144 190 crc32_final (gf_crc32_context *ctx, uint8_t *md)
145 {
146 190 uint32_t crc = 0;
147
148 190 ctx->crc = (REFLECT_REMAINDER (ctx->crc) ^ FINAL_XOR_VALUE);
149 190 crc = GUINT32_TO_LE (ctx->crc);
150 190 memcpy (md, &crc, 4);
151 190 }
152
153 uint8_t
154 190 gx_proto_crc32_calc (uint8_t *pchMsg, uint32_t wDataLen, uint8_t *pchMsgDst)
155 {
156 190 gf_crc32_context context = { 0 };
157
158
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 190 if (!pchMsg)
159 return 0;
160
161 190 crc32_init (&context);
162
163 190 crc32_update (&context, pchMsg, wDataLen);
164
165 190 crc32_final (&context, pchMsgDst);
166
167
168 190 return 1;
169 }
170 /*
171 * protocol
172 *
173 */
174
175 static uint8_t dump_seq = 0;
176
177 static void
178 63 init_pack_header (
179 ppack_header pheader,
180 uint16_t len,
181 uint16_t cmd,
182 uint8_t packagenum
183 )
184 {
185
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 63 g_assert (pheader);
186
187 63 memset (pheader, 0, sizeof (*pheader));
188 63 pheader->cmd0 = HIBYTE (cmd);
189 63 pheader->cmd1 = LOBYTE (cmd);
190 63 pheader->packagenum = packagenum;
191 63 pheader->reserved = dump_seq++;
192 63 pheader->len = GUINT16_TO_LE (len + PACKAGE_CRC_SIZE);
193 63 pheader->crc8 = gx_proto_crc8_calc ((uint8_t *) pheader, 6);
194 63 pheader->rev_crc8 = ~pheader->crc8;
195 63 }
196
197
198 int
199 63 gx_proto_build_package (uint8_t *ppackage,
200 uint32_t *package_len,
201 uint16_t cmd,
202 const uint8_t *payload,
203 uint32_t payload_size)
204 {
205 63 pack_header header;
206
207
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 63 if (!ppackage || !package_len)
208 return -1;
209
210
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 63 if(*package_len < (payload_size + PACKAGE_HEADER_SIZE + PACKAGE_CRC_SIZE))
211 return -1;
212
213 63 init_pack_header (&header, payload_size, cmd, 0);
214
215 63 memcpy (ppackage, &header, PACKAGE_HEADER_SIZE);
216
217
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 63 if (payload)
218 56 memcpy (ppackage + PACKAGE_HEADER_SIZE, payload, payload_size);
219 else
220 7 ppackage[PACKAGE_HEADER_SIZE] = 0;
221
222 63 gx_proto_crc32_calc (ppackage, PACKAGE_HEADER_SIZE + payload_size, ppackage + PACKAGE_HEADER_SIZE + payload_size);
223
224 63 return 0;
225 }
226
227
228 int
229 126 gx_proto_parse_header (FpiByteReader *reader,
230 pack_header *pheader)
231 {
232
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 126 if (!pheader)
233 return -1;
234
235
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 126 if (!fpi_byte_reader_get_uint8 (reader, &pheader->cmd0))
236 ✗ g_return_val_if_reached (-1);
237
238
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 126 if (!fpi_byte_reader_get_uint8 (reader, &pheader->cmd1))
239 ✗ g_return_val_if_reached (-1);
240
241
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 126 if (!fpi_byte_reader_get_uint8 (reader, &pheader->packagenum))
242 ✗ g_return_val_if_reached (-1);
243
244
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 126 if (!fpi_byte_reader_get_uint8 (reader, &pheader->reserved))
245 ✗ g_return_val_if_reached (-1);
246
247
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 126 if (!fpi_byte_reader_get_uint16_le (reader, &pheader->len))
248 ✗ g_return_val_if_reached (-1);
249
250
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 126 if (!fpi_byte_reader_get_uint8 (reader, &pheader->crc8))
251 ✗ g_return_val_if_reached (-1);
252
253
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 126 if (!fpi_byte_reader_get_uint8 (reader, &pheader->rev_crc8))
254 ✗ g_return_val_if_reached (-1);
255
256 return 0;
257 }
258
259 static int
260 3 gx_proto_parse_fingerid (FpiByteReader *reader,
261 ptemplate_format_t template)
262 {
263 3 uint8_t byte;
264
265
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 3 if (!template)
266 return -1;
267
268
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 3 if (!fpi_byte_reader_get_uint8 (reader, &byte) || byte != 67)
269 ✗ g_return_val_if_reached (-1);
270
271
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 3 if (!fpi_byte_reader_get_uint8 (reader, &template->type))
272 ✗ g_return_val_if_reached (-1);
273
274
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 3 if (!fpi_byte_reader_get_uint8 (reader, &template->finger_index))
275 ✗ g_return_val_if_reached (-1);
276
277
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 3 if (!fpi_byte_reader_skip (reader, 1))
278 ✗ g_return_val_if_reached (-1);
279
280
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 3 if (!fpi_byte_reader_get_data_static (reader, template->accountid))
281 ✗ g_return_val_if_reached (-1);
282
283
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 3 if (!fpi_byte_reader_get_data_static (reader, template->tid))
284 ✗ g_return_val_if_reached (-1);
285
286
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 3 if (!fpi_byte_reader_get_uint8 (reader, &template->payload.size))
287 ✗ g_return_val_if_reached (-1);
288
289
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 3 if (template->payload.size > sizeof (template->payload.data))
290 {
291 ✗ g_warning ("Device reported oversized payload (%d)", template->payload.size);
292 ✗ return -1;
293 }
294
295
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 3 if (!(fpi_byte_reader_get_data_static) (reader, template->payload.size,
296 3 template->payload.data))
297 ✗ g_return_val_if_reached (-1);
298
299 return 0;
300 }
301
302 int
303 126 gx_proto_parse_body (uint16_t cmd, FpiByteReader *byte_reader, pgxfp_cmd_response_t presp)
304 {
305
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 126 if (!presp)
306 return -1;
307
308
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 126 if (!fpi_byte_reader_get_uint8 (byte_reader, &presp->result))
309 ✗ g_return_val_if_reached (-1);
310
311
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 126 switch (HIBYTE (cmd))
312 {
313 63 case RESPONSE_PACKAGE_CMD:
314 {
315
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 63 if (!fpi_byte_reader_get_uint8 (byte_reader, &presp->parse_msg.ack_cmd))
316 ✗ g_return_val_if_reached (-1);
317 }
318 126 break;
319
320 1 case MOC_CMD0_UPDATE_CONFIG:
321 {
322 1 presp->finger_config.status = presp->result;
323 /* to compatiable old version firmware */
324 1 presp->finger_config.max_stored_prints = FP_MAX_FINGERNUM;
325
326
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 1 if (fpi_byte_reader_skip (byte_reader, 1))
327 1 fpi_byte_reader_get_uint8 (byte_reader,
328 &presp->finger_config.max_stored_prints);
329 }
330 break;
331
332 case MOC_CMD0_COMMITENROLLMENT:
333 case MOC_CMD0_DELETETEMPLATE:
334 /* just check result */
335 break;
336
337 6 case MOC_CMD0_PWR_BTN_SHIELD:
338 6 presp->power_button_shield_resp.resp_cmd1 = LOBYTE (cmd);
339 6 uint8_t support_pwr_shield;
340
341
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 6 if (fpi_byte_reader_get_uint8 (byte_reader, &support_pwr_shield) &&
342
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 6 support_pwr_shield == 0xFF)
343 ✗ g_debug ("Power button shield feature not supported!\n");
344 break;
345
346 1 case MOC_CMD0_GET_VERSION:
347 1 const uint8_t *version_info;
348
349
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 1 if (!fpi_byte_reader_get_data (byte_reader, sizeof (gxfp_version_info_t), &version_info))
350 ✗ g_return_val_if_reached (-1);
351
352 1 memcpy (&presp->version_info, version_info, sizeof (gxfp_version_info_t));
353 1 break;
354
355 16 case MOC_CMD0_CAPTURE_DATA:
356
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 16 if (LOBYTE (cmd) == MOC_CMD1_DEFAULT)
357 {
358
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 16 if (!fpi_byte_reader_get_uint8 (byte_reader,
359 &presp->capture_data_resp.img_quality))
360 ✗ g_return_val_if_reached (-1);
361
362
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 16 if (!fpi_byte_reader_get_uint8 (byte_reader,
363 &presp->capture_data_resp.img_coverage))
364 ✗ g_return_val_if_reached (-1);
365 }
366 break;
367
368 1 case MOC_CMD0_ENROLL_INIT:
369
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 1 if (presp->result != GX_SUCCESS)
370 break;
371 1 const uint8_t *tid;
372
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 1 if (!fpi_byte_reader_get_data (byte_reader, TEMPLATE_ID_SIZE, &tid))
373 ✗ g_return_val_if_reached (-1);
374 1 memcpy (presp->enroll_create.tid, tid, TEMPLATE_ID_SIZE);
375 1 break;
376
377 14 case MOC_CMD0_ENROLL:
378 14 presp->enroll_update.rollback = (presp->result < 0x80) ? false : true;
379
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 14 if (!fpi_byte_reader_get_uint8 (byte_reader,
380 &presp->enroll_update.img_overlay))
381 ✗ g_return_val_if_reached (-1);
382
383
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 14 if (!fpi_byte_reader_get_uint8 (byte_reader,
384 &presp->enroll_update.img_preoverlay))
385 ✗ g_return_val_if_reached (-1);
386 break;
387
388 1 case MOC_CMD0_CHECK4DUPLICATE:
389 1 presp->check_duplicate_resp.duplicate = (presp->result == 0) ? false : true;
390
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 1 if (presp->check_duplicate_resp.duplicate)
391 {
392 ✗ uint16_t tid_size;
393 ✗ FpiByteReader tid_reader;
394
395 ✗ if (!fpi_byte_reader_get_uint16_le (byte_reader, &tid_size))
396 ✗ g_return_val_if_reached (-1);
397
398 ✗ if (!fpi_byte_reader_get_sub_reader (byte_reader, &tid_reader, tid_size))
399 ✗ g_return_val_if_reached (-1);
400
401 ✗ if (gx_proto_parse_fingerid (&tid_reader, &presp->check_duplicate_resp.template) != 0)
402 ✗ g_return_val_if_reached (-1);
403 }
404 break;
405
406 3 case MOC_CMD0_GETFINGERLIST:
407
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 3 if (presp->result != GX_SUCCESS)
408 break;
409
410
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 3 if (!fpi_byte_reader_get_uint8 (byte_reader,
411 &presp->finger_list_resp.finger_num))
412 ✗ g_return_val_if_reached (-1);
413
414
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 3 if (presp->finger_list_resp.finger_num > FP_MAX_FINGERNUM)
415 {
416 ✗ g_warning ("Device reported too many fingers (%d)",
417 presp->finger_list_resp.finger_num);
418 ✗ return -1;
419 }
420
421
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 4 for(uint8_t num = 0; num < presp->finger_list_resp.finger_num; num++)
422 {
423 1 uint16_t fingerid_length;
424 1 FpiByteReader fingerid_reader;
425
426
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 1 if (!fpi_byte_reader_get_uint16_le (byte_reader, &fingerid_length))
427 ✗ g_return_val_if_reached (-1);
428
429
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 1 if (!fpi_byte_reader_get_sub_reader (byte_reader, &fingerid_reader,
430 fingerid_length))
431 ✗ g_return_val_if_reached (-1);
432
433
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 1 if (gx_proto_parse_fingerid (&fingerid_reader,
434 1 &presp->finger_list_resp.finger_list[num]) != 0)
435 {
436 ✗ g_warning ("Failed to parse finger list");
437 1 g_return_val_if_reached (-1);
438 }
439 }
440 break;
441
442 2 case MOC_CMD0_IDENTIFY:
443 {
444 2 uint32_t score = 0;
445 2 uint8_t study = 0;
446 2 uint16_t fingerid_size = 0;
447
448 2 presp->verify.match = (presp->result == 0) ? true : false;
449
450
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 2 if (presp->verify.match)
451 {
452 2 FpiByteReader finger_reader;
453
454
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 2 if (!fpi_byte_reader_get_uint16_le (byte_reader,
455 &presp->verify.rejectdetail))
456 ✗ g_return_val_if_reached (-1);
457
458
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 2 if (!fpi_byte_reader_get_uint32_le (byte_reader, &score))
459 ✗ g_return_val_if_reached (-1);
460
461
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 2 if (!fpi_byte_reader_get_uint8 (byte_reader, &study))
462 ✗ g_return_val_if_reached (-1);
463
464
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 2 if (!fpi_byte_reader_get_uint16_le (byte_reader, &fingerid_size))
465 ✗ g_return_val_if_reached (-1);
466
467
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 2 if (!fpi_byte_reader_get_sub_reader (byte_reader, &finger_reader,
468 fingerid_size))
469 ✗ g_return_val_if_reached (-1);
470
471
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 2 if (gx_proto_parse_fingerid (&finger_reader,
472 2 &presp->verify.template) != 0)
473 {
474 ✗ presp->result = GX_FAILED;
475 ✗ break;
476 }
477 2 g_debug ("match, score: %d, study: %d", score, study);
478 }
479 }
480 2 break;
481
482 15 case MOC_CMD0_FINGER_MODE:
483 15 presp->finger_status.status = presp->result;
484 15 break;
485
486 default:
487 break;
488 }
489
490 126 return 0;
491 }
492
493 static uint8_t sensor_config[26] = {
494 0x00, 0x00, 0x64, 0x50, 0x0f, 0x41, 0x08, 0x0a, 0x18, 0x00, 0x00, 0x23, 0x00,
495 0x00, 0x01, 0x01, 0x00, 0x01, 0x01, 0x01, 0x01, 0x00, 0x01, 0x01, 0x05, 0x05
496 };
497
498 int
499 1 gx_proto_init_sensor_config (pgxfp_sensor_cfg_t pconfig)
500 {
501
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 1 if (!pconfig)
502 return -1;
503 1 memset (pconfig, 0, sizeof (*pconfig));
504
505 //NOTICE: Do not change any value!
506 1 memcpy (&pconfig->config, sensor_config, G_N_ELEMENTS (sensor_config));
507 1 pconfig->reserved[0] = 1;
508
509 1 gx_proto_crc32_calc ((uint8_t *) pconfig, sizeof (*pconfig) - PACKAGE_CRC_SIZE, pconfig->crc_value);
510
511 1 return 0;
512 }
513