X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/0c1cb4aef074f37ac0368103a7e26421705861aa..fd4f21b766a715303f0b1436c9970f5965e644dc:/client/cmdlfviking.c

diff --git a/client/cmdlfviking.c b/client/cmdlfviking.c
index 8c0656d2..fa073df1 100644
--- a/client/cmdlfviking.c
+++ b/client/cmdlfviking.c
@@ -47,8 +47,8 @@ int usage_lf_viking_sim(void) {
 
 uint64_t getVikingBits(uint32_t id) {
 	//calc checksum
-	uint8_t checksum = (id>>24) ^ ((id>>16) & 0xFF) ^ ((id>>8) & 0xFF) ^ (id & 0xFF) ^ 0xF2 ^ 0xA8;
-	return ((uint64_t)0xF2 << 56) | (id << 8) | checksum;
+	uint8_t checksum = ((id>>24) & 0xFF) ^ ((id>>16) & 0xFF) ^ ((id>>8) & 0xFF) ^ (id & 0xFF) ^ 0xF2 ^ 0xA8;
+	return ((uint64_t)0xF2 << 56) | ((uint64_t)id << 8) | checksum;
 }
 //by marshmellow
 //see ASKDemod for what args are accepted
@@ -66,7 +66,7 @@ int CmdVikingClone(const char *Cmd) {
 	uint64_t rawID = 0;
 	bool Q5 = false;
 	char cmdp = param_getchar(Cmd, 0);
-	if (strlen(Cmd) < 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_clone();
+	if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_clone();
 
 	id = param_get32ex(Cmd, 0, 0, 16);
 	if (id == 0) return usage_lf_viking_clone();
@@ -89,7 +89,7 @@ int CmdVikingSim(const char *Cmd) {
 	uint8_t clk = 32, encoding = 1, separator = 0, invert = 0;
 	char cmdp = param_getchar(Cmd, 0);
 
-	if (strlen(Cmd) < 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_sim();
+	if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_sim();
 	id = param_get32ex(Cmd, 0, 0, 16);
 	if (id == 0) return usage_lf_viking_sim();