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egismoc: Use FpiByteReader to read the enrolled IDs

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Marco Trevisan (Treviño)
2024-02-20 05:04:52 +01:00
parent dd5a71695f
commit 28c26c7d7e
1 changed files with 17 additions and 5 deletions
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22
libfprint/drivers/egismoc/egismoc.c
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@@ -457,17 +457,29 @@ egismoc_list_fill_enrolled_ids_cb (FpDevice *device,
g_clear_pointer (&self->enrolled_ids, g_ptr_array_unref);
self->enrolled_ids = g_ptr_array_new_with_free_func (g_free);
FpiByteReader reader;
gboolean read = TRUE;
fpi_byte_reader_init (&reader, buffer_in, length_in);
read &= fpi_byte_reader_set_pos (&reader, EGISMOC_LIST_RESPONSE_PREFIX_SIZE);
/*
* Each fingerprint ID will be returned in this response as a 32 byte array
* The other stuff in the payload is 16 bytes long, so if there is at least 1
* print then the length should be at least 16+32=48 bytes long
*/
for (int pos = EGISMOC_LIST_RESPONSE_PREFIX_SIZE;
pos < length_in - EGISMOC_LIST_RESPONSE_SUFFIX_SIZE;
pos += EGISMOC_FINGERPRINT_DATA_SIZE)
while (read)
{
g_autofree gchar *print_id = g_strndup ((gchar *) buffer_in + pos,
EGISMOC_FINGERPRINT_DATA_SIZE);
const guint8 *data;
g_autofree gchar *print_id = NULL;
read &= fpi_byte_reader_get_data (&reader, EGISMOC_FINGERPRINT_DATA_SIZE,
&data);
if (!read)
break;
print_id = g_strndup ((gchar *) data, EGISMOC_FINGERPRINT_DATA_SIZE);
fp_dbg ("Device fingerprint %0d: %.*s", self->enrolled_ids->len + 1,
EGISMOC_FINGERPRINT_DATA_SIZE, print_id);
g_ptr_array_add (self->enrolled_ids, g_steal_pointer (&print_id));