michaelkuc6/U2FDevice
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Reformatting.

Browse Source
This commit is contained in:
Michael Kuc
2019-08-23 13:27:30 +01:00
parent 03dba21ad4
commit 01dad2ee0a
42 changed files with 859 additions and 987 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
Signature.cpp
View File

@@ -21,27 +21,24 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
using namespace std;
//Ripped from https://github.com/pratikd650/Teensy_U2F/blob/master/Teensy_U2F.cpp
void appendSignatureAsDER(vector<uint8_t> &response, const array<uint8_t, 64> &signature)
{
// Ripped from https://github.com/pratikd650/Teensy_U2F/blob/master/Teensy_U2F.cpp
void appendSignatureAsDER(vector<uint8_t>& response, const array<uint8_t, 64>& signature) {
response.push_back(0x30); // Start of ASN.1 SEQUENCE
response.push_back(68); //total length from (2 * (32 + 2)) to (2 * (33 + 2))
response.push_back(68); // total length from (2 * (32 + 2)) to (2 * (33 + 2))
size_t countByte = response.size() - 1;
// Loop twice - for R and S
for(unsigned int i = 0; i < 2; i++)
{
for (unsigned int i = 0; i < 2; i++) {
unsigned int sigOffs = i * 32;
auto offset = signature.begin() + sigOffs;
response.push_back(0x02); //header: integer
response.push_back(32); //32 byte
if (signature[sigOffs] > 0x7f)
{
response.push_back(0x02); // header: integer
response.push_back(32); // 32 byte
if (signature[sigOffs] > 0x7f) {
// Integer needs to be represented in 2's completement notion
response.back()++;
response.push_back(0); // add leading 0, to indicate it is a positive number
response[countByte]++;
}
copy(offset, offset + 32, back_inserter(response)); //R or S value
copy(offset, offset + 32, back_inserter(response)); // R or S value
}
}