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Fix incorrect lenght of command INS_PREFIX_HASH

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buffer_send[4] (LC) is an unsigned char, len should not
exceed 254 (255 - 1 for the option).
This commit is contained in:
François Colas 2020-05-27 14:57:05 +02:00
parent 77a008f714
commit ec46069248
1 changed files with 2 additions and 2 deletions
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4
src/device/device_ledger.cpp
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@ -1468,8 +1468,8 @@ namespace hw {
offset = set_command_header(INS_PREFIX_HASH,2,cnt);
len = pref_length - pref_offset;
//options
if (len > (BUFFER_SEND_SIZE-7)) {
len = BUFFER_SEND_SIZE-7;
if (len > (BUFFER_SEND_SIZE-offset-3)) {
len = BUFFER_SEND_SIZE-offset-3;
this->buffer_send[offset] = 0x80;
} else {
this->buffer_send[offset] = 0x00;