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goodixmoc: Cleanup the byte reader usage

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Marco Trevisan (Treviño)
2026-07-13 08:13:46 +00:00
committed by Marco Trevisan
parent 0c0baf639e
commit 3138ad0c8a
2 changed files with 15 additions and 22 deletions
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libfprint/drivers/goodixmoc/goodix.c
+11 -7
View File
@@ -157,8 +157,7 @@ fp_cmd_receive_cb (FpiUsbTransfer *transfer,
return; return;
} }
reader.data = transfer->buffer; fpi_byte_reader_init (&reader, transfer->buffer, transfer->actual_length);
reader.size = transfer->actual_length;
if (gx_proto_parse_header (&reader, &header) != 0) if (gx_proto_parse_header (&reader, &header) != 0)
{ {
@@ -168,7 +167,8 @@ fp_cmd_receive_cb (FpiUsbTransfer *transfer,
return; return;
} }
if (!fpi_byte_reader_set_pos (&reader, PACKAGE_HEADER_SIZE + header.len)) if (header.len < PACKAGE_CRC_SIZE ||
!fpi_byte_reader_set_pos (&reader, PACKAGE_HEADER_SIZE + header.len - PACKAGE_CRC_SIZE))
{ {
fpi_ssm_mark_failed (transfer->ssm, fpi_ssm_mark_failed (transfer->ssm,
fpi_device_error_new_msg (FP_DEVICE_ERROR_PROTO, fpi_device_error_new_msg (FP_DEVICE_ERROR_PROTO,
@@ -176,7 +176,13 @@ fp_cmd_receive_cb (FpiUsbTransfer *transfer,
return; return;
} }
gx_proto_crc32_calc (transfer->buffer, PACKAGE_HEADER_SIZE + header.len, (uint8_t *) &crc32_calc); /* Exclude the CRC from the package length */
header.len -= PACKAGE_CRC_SIZE;
/* The reader is positioned right at the CRC, i.e. at the end of the data the
* CRC is computed over, so use its position as the length. */
gx_proto_crc32_calc (transfer->buffer, fpi_byte_reader_get_pos (&reader),
(uint8_t *) &crc32_calc);
if (!fpi_byte_reader_get_uint32_le (&reader, &crc32) || if (!fpi_byte_reader_get_uint32_le (&reader, &crc32) ||
GUINT32_FROM_LE (crc32_calc) != crc32) GUINT32_FROM_LE (crc32_calc) != crc32)
@@ -189,9 +195,7 @@ fp_cmd_receive_cb (FpiUsbTransfer *transfer,
cmd = MAKE_CMD_EX (header.cmd0, header.cmd1); cmd = MAKE_CMD_EX (header.cmd0, header.cmd1);
fpi_byte_reader_set_pos (&reader, 0); fpi_byte_reader_init (&reader, &transfer->buffer[PACKAGE_HEADER_SIZE], header.len);
reader.data = &transfer->buffer[PACKAGE_HEADER_SIZE];
reader.size = header.len;
if (gx_proto_parse_body (cmd, &reader, &cmd_reponse) != 0) if (gx_proto_parse_body (cmd, &reader, &cmd_reponse) != 0)
{ {
libfprint/drivers/goodixmoc/goodix_proto.c
+4 -15
View File
@@ -253,11 +253,6 @@ gx_proto_parse_header (FpiByteReader *reader,
if (!fpi_byte_reader_get_uint8 (reader, &pheader->rev_crc8)) if (!fpi_byte_reader_get_uint8 (reader, &pheader->rev_crc8))
g_return_val_if_reached (-1); g_return_val_if_reached (-1);
if (pheader->len < PACKAGE_CRC_SIZE)
return -1;
pheader->len -= PACKAGE_CRC_SIZE;
return 0; return 0;
} }
@@ -266,7 +261,6 @@ gx_proto_parse_fingerid (FpiByteReader *reader,
ptemplate_format_t template) ptemplate_format_t template)
{ {
uint8_t byte; uint8_t byte;
const uint8_t *buffer;
if (!template) if (!template)
return -1; return -1;
@@ -283,16 +277,12 @@ gx_proto_parse_fingerid (FpiByteReader *reader,
if (!fpi_byte_reader_skip (reader, 1)) if (!fpi_byte_reader_skip (reader, 1))
g_return_val_if_reached (-1); g_return_val_if_reached (-1);
if (!fpi_byte_reader_get_data (reader, sizeof (template->accountid), &buffer)) if (!fpi_byte_reader_get_data_static (reader, template->accountid))
g_return_val_if_reached (-1); g_return_val_if_reached (-1);
memcpy (template->accountid, buffer, sizeof (template->accountid)); if (!fpi_byte_reader_get_data_static (reader, template->tid))
if (!fpi_byte_reader_get_data (reader, sizeof (template->tid), &buffer))
g_return_val_if_reached (-1); g_return_val_if_reached (-1);
memcpy (template->tid, buffer, sizeof (template->tid));
if (!fpi_byte_reader_get_uint8 (reader, &template->payload.size)) if (!fpi_byte_reader_get_uint8 (reader, &template->payload.size))
g_return_val_if_reached (-1); g_return_val_if_reached (-1);
@@ -302,11 +292,10 @@ gx_proto_parse_fingerid (FpiByteReader *reader,
return -1; return -1;
} }
if (!fpi_byte_reader_get_data (reader, template->payload.size, &buffer)) if (!(fpi_byte_reader_get_data_static) (reader, template->payload.size,
template->payload.data))
g_return_val_if_reached (-1); g_return_val_if_reached (-1);
memcpy (template->payload.data, buffer, template->payload.size);
return 0; return 0;
} }