1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/*
This is a simple example to use libinfnoise with whitened and multiplied output.
*/
#include <stdio.h>
#include <ftdi.h>
#include <libinfnoise.h>
int main()
{
// parameters
char *serial=NULL; // can be set to a specific serial, NULL uses the first found device
bool initKeccak = true; // initialize Keccak sponge (used for whitening)
uint32_t multiplier = 1u; // multiplier for whitening
bool debug = false; // debug mode (health monitor writes to stderr)
// initialize hardware and health monitor
struct infnoise_context context;
if (!initInfnoise(&context, serial, initKeccak, debug)) {
fprintf(stderr, "Error: %s\n", context.message);
return 1; // ERROR
}
// fixed result size of 512 bit (64byte)
uint8_t resultSize = 64u;
// read and print in a loop (until 1MB is read)
uint64_t totalBytesWritten = 0u;
while (totalBytesWritten < 1000000) {
uint8_t result[resultSize];
context.errorFlag = false;
// readRawData returns the number of bytes written to result array
uint64_t bytesWritten = readData(&context, result, !initKeccak, multiplier);
// check for errors
// note: bytesWritten is also 0 in this case, but an errorFlag is needed as
// bytesWritten can also be 0 when data hasn't passed the health monitor.
// (which happens sometimes in normal operation - and is expected behaviour)
if (context.errorFlag) {
fprintf(stderr, "Error: %s\n", context.message);
return -1;
}
// print as many bytes as readData told us
fwrite(result, 1, bytesWritten, stdout);
// sum up
totalBytesWritten += bytesWritten;
fprintf(stderr, "bytes read: %lu\n", (unsigned long) totalBytesWritten);
}
return 0;
}
|
