From f0cb3e813a51034dd0d8051aa7165b926e0d8411 Mon Sep 17 00:00:00 2001
From: cbdev <cb@cbcdn.com>
Date: Sun, 18 Jun 2023 13:07:25 +0200
Subject: Initial basic library

---
 yhy_test.c | 96 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 yhy_test.c

(limited to 'yhy_test.c')

diff --git a/yhy_test.c b/yhy_test.c
new file mode 100644
index 0000000..65cfa4a
--- /dev/null
+++ b/yhy_test.c
@@ -0,0 +1,96 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "libyhy.h"
+
+#define ATQA_UIDSIZE_BITS(x) ((x & 0x00C0) >> 6)
+#define UID_CASCADE_TAG 0x88
+#define SAK_UID_INCOMPLETE(x) (x & 0x04)
+
+int main(int argc, char** argv){
+	size_t n;
+	uint8_t test_block = 4;
+	int fd = yhy_open("/dev/ttyUSB0");
+
+	printf("YHY Test: %d\n", fd);
+	yhy_sync_led(fd, 3);
+	//yhy_sync_beep(fd, 0x64);
+	
+	printf("Reading version\n");
+	char version[512];
+	yhy_sync_read_version(fd, version, 512);
+	printf("Version %s\n\n", version);
+
+	size_t bytes;
+	uint16_t atqa = 0;
+	uint8_t sak = 0;
+	uint8_t serial[10] = "";
+
+	//iterate cards in field
+	printf("Scanning field\n\n");
+
+	for(yhy_sync_request(fd, 1, &atqa); atqa; yhy_sync_request(fd, 0, &atqa)){
+		printf("ATQA %04X\n", atqa);
+		//ATQA and SAK should not be used for identifying PICCs.
+		//However, we don't have lower-level access to the APDUs
+		printf("ATQA UID size: %d\n\n", ATQA_UIDSIZE_BITS(atqa));
+
+		if(ATQA_UIDSIZE_BITS(atqa) == 1){
+			printf("Based on ATQA, running UL select\n");
+			bytes = yhy_sync_ulselect(fd, serial, sizeof(serial));
+			printf("Received %lu bytes\n", bytes);
+		}
+		else{
+			printf("Performing Anticollision (Cascade Level 1)\n");
+			bytes = yhy_sync_anticoll(fd, serial, sizeof(serial));
+			printf("UID %lu bytes, %02X %02X %02X %02X\n", bytes,
+					serial[0],
+					serial[1],
+					serial[2],
+					serial[3]);
+	
+			if(serial[0] == UID_CASCADE_TAG){
+				printf("UID has CT prefix, UID is yet incomplete\n");
+			}
+	
+			printf("\nSelecting (Cascade Level 1)\n");
+			yhy_sync_select(fd, serial, 4, &sak);
+			printf("SAK CL1 %02X\n", sak);
+			if(SAK_UID_INCOMPLETE(sak)){
+				printf("SAK CL1 indicates incomplete UID\n");
+			}
+		}
+
+		printf("\nHalting card\n");
+		yhy_sync_hlta(fd);
+	}
+
+	printf("\nAll PICCs enumerated\n");
+
+	/*
+	printf("Authenticating for block %d\n", test_block);
+	uint8_t key[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
+	yhy_sync_auth(fd, 1, test_block, key);
+	printf("\n");
+
+	printf("Reading block %d\n", test_block);
+	uint8_t data[16] = {0};
+	yhy_sync_read(fd, test_block, data, 16);
+	printf("Block %d data: ", test_block);
+	for(n = 0; n < 16; n++){
+		printf("%02x ", data[n]);
+	}
+	printf("\n\n");
+
+	printf("Incrementing all bytes in block %d\n", test_block);
+	for(n = 0; n < 16; n++){
+		data[n]++;
+	}
+	
+	printf("Writing block %d\n", test_block);
+	yhy_sync_write(fd, test_block, data);
+	printf("\n");
+	*/
+
+	close(fd);
+}
-- 
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