Merge pull request #219 from marshmellow42/master

[proxmark3-svn] / client / cmdlfviking.c

diff --git a/client/cmdlfviking.c b/client/cmdlfviking.c
index 8c0656d2b31be6a9590e7161d4f77aba901df0b2..fa073df1f6d9acaec42abe387dc029b83101b127 100644 (file)
--- 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();