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-rw-r--r--examples/04-turboshake128/main.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/examples/04-turboshake128/main.c b/examples/04-turboshake128/main.c
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+++ b/examples/04-turboshake128/main.c
@@ -0,0 +1,56 @@
+//
+// turboshake128-example: Absorb 4096 bytes of data from /dev/urandom in
+// 1024 byte chunks, hash it with TurboShake128, then print 128 bytes of
+// result in 32 byte chunks (hex-encoded) to standard output.
+// output.
+//
+#include <stdint.h>
+#include <stdio.h>
+#include <err.h>
+#include "hex.h"
+#include "sha3.h"
+
+int main() {
+ // init turboshake
+ turboshake_t ts;
+ turboshake128_init(&ts);
+
+ // open source
+ FILE *fh = fopen("/dev/urandom", "rb");
+ if (!fh) {
+ err(-1, "fopen()");
+ }
+
+ {
+ // read and absorb
+ uint8_t buf[1024] = { 0 };
+ for (size_t i = 0; i < 4096/sizeof(buf); i++) {
+ // read data
+ if (!fread(buf, sizeof(buf), 1, fh)) {
+ err(-1, "fread()");
+ }
+
+ // absorb
+ turboshake128_absorb(&ts, buf, sizeof(buf));
+ }
+ }
+
+ // close source
+ if (!fclose(fh)) {
+ warn("fclose()");
+ }
+
+
+ printf("TurboShake128 output:\n");
+ {
+ // squeeze in 32 byte chunks, write to stdout
+ uint8_t buf[32] = { 0 };
+ for (size_t ofs = 0; ofs < 128; ofs += sizeof(buf)) {
+ turboshake128_squeeze(&ts, buf, sizeof(buf));
+ hex_write(stdout, buf, sizeof(buf));
+ }
+ }
+ printf("\n");
+
+ return 0;
+}