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chg: analyse chksum - now respects the mask variable,

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iceman1001 2017-02-19 00:13:32 +01:00
commit f054036a10
1 changed files with 8 additions and 10 deletions
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16
client/cmdanalyse.c
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@ -87,7 +87,7 @@ static uint16_t calcSumCrumbAdd( uint8_t* bytes, uint8_t len, uint32_t mask) {
return sum; return sum;
} }
static uint16_t calcSumCrumbAddOnes( uint8_t* bytes, uint8_t len, uint32_t mask) { static uint16_t calcSumCrumbAddOnes( uint8_t* bytes, uint8_t len, uint32_t mask) {
return ~calcSumCrumbAdd(bytes, len, mask); return (~calcSumCrumbAdd(bytes, len, mask) & mask);
} }
static uint16_t calcSumNibbleAdd( uint8_t* bytes, uint8_t len, uint32_t mask) { static uint16_t calcSumNibbleAdd( uint8_t* bytes, uint8_t len, uint32_t mask) {
uint8_t sum = 0; uint8_t sum = 0;
@ -99,7 +99,7 @@ static uint16_t calcSumNibbleAdd( uint8_t* bytes, uint8_t len, uint32_t mask) {
return sum; return sum;
} }
static uint16_t calcSumNibbleAddOnes( uint8_t* bytes, uint8_t len, uint32_t mask){ static uint16_t calcSumNibbleAddOnes( uint8_t* bytes, uint8_t len, uint32_t mask){
return ~calcSumNibbleAdd(bytes, len, mask); return (~calcSumNibbleAdd(bytes, len, mask) & mask);
} }
static uint16_t calcSumCrumbXor( uint8_t* bytes, uint8_t len, uint32_t mask) { static uint16_t calcSumCrumbXor( uint8_t* bytes, uint8_t len, uint32_t mask) {
uint8_t sum = 0; uint8_t sum = 0;
@ -137,7 +137,7 @@ static uint16_t calcSumByteAdd( uint8_t* bytes, uint8_t len, uint32_t mask) {
} }
// Ones complement // Ones complement
static uint16_t calcSumByteAddOnes( uint8_t* bytes, uint8_t len, uint32_t mask) { static uint16_t calcSumByteAddOnes( uint8_t* bytes, uint8_t len, uint32_t mask) {
return ~calcSumByteAdd(bytes, len, mask); return (~calcSumByteAdd(bytes, len, mask) & mask);
} }
static uint16_t calcSumByteSub( uint8_t* bytes, uint8_t len, uint32_t mask) { static uint16_t calcSumByteSub( uint8_t* bytes, uint8_t len, uint32_t mask) {
@ -148,7 +148,7 @@ static uint16_t calcSumByteSub( uint8_t* bytes, uint8_t len, uint32_t mask) {
return sum; return sum;
} }
static uint16_t calcSumByteSubOnes( uint8_t* bytes, uint8_t len, uint32_t mask){ static uint16_t calcSumByteSubOnes( uint8_t* bytes, uint8_t len, uint32_t mask){
return ~calcSumByteSub(bytes, len, mask); return (~calcSumByteSub(bytes, len, mask) & mask);
} }
static uint16_t calcSumNibbleSub( uint8_t* bytes, uint8_t len, uint32_t mask) { static uint16_t calcSumNibbleSub( uint8_t* bytes, uint8_t len, uint32_t mask) {
uint8_t sum = 0; uint8_t sum = 0;
@ -160,7 +160,7 @@ static uint16_t calcSumNibbleSub( uint8_t* bytes, uint8_t len, uint32_t mask) {
return sum; return sum;
} }
static uint16_t calcSumNibbleSubOnes( uint8_t* bytes, uint8_t len, uint32_t mask) { static uint16_t calcSumNibbleSubOnes( uint8_t* bytes, uint8_t len, uint32_t mask) {
return ~calcSumNibbleSub(bytes, len, mask); return (~calcSumNibbleSub(bytes, len, mask) & mask);
} }
// BSD shift checksum 8bit version // BSD shift checksum 8bit version
@ -189,8 +189,6 @@ static uint16_t calcBSDchecksum4( uint8_t* bytes, uint8_t len, uint32_t mask){
return sum; return sum;
} }
// measuring LFSR maximum length // measuring LFSR maximum length
int CmdAnalyseLfsr(const char *Cmd){ int CmdAnalyseLfsr(const char *Cmd){
@ -324,10 +322,10 @@ int CmdAnalyseCHKSUM(const char *Cmd){
if (useHeader) { if (useHeader) {
PrintAndLog(" add | sub | add 1's compl | sub 1's compl | xor"); PrintAndLog(" add | sub | add 1's compl | sub 1's compl | xor");
PrintAndLog("byte nibble crumb | byte nibble | byte nibble cumb | byte nibble | byte nibble cumb | BSD"); PrintAndLog("byte nibble crumb | byte nibble | byte nibble cumb | byte nibble | byte nibble cumb | BSD |");
PrintAndLog("------------------+-------------+------------------+-----------------+--------------------"); PrintAndLog("------------------+-------------+------------------+-----------------+--------------------");
} }
PrintAndLog("0x%X 0x%X 0x%X | 0x%X 0x%X | 0x%X 0x%X 0x%X | 0x%X 0x%X | 0x%X 0x%X 0x%X | 0x%X 0x%X\n", PrintAndLog("0x%X 0x%X 0x%X | 0x%X 0x%X | 0x%X 0x%X 0x%X | 0x%X 0x%X | 0x%X 0x%X 0x%X | 0x%X 0x%X |\n",
calcSumByteAdd(data, len, mask) calcSumByteAdd(data, len, mask)
, calcSumNibbleAdd(data, len, mask) , calcSumNibbleAdd(data, len, mask)
, calcSumCrumbAdd(data, len, mask) , calcSumCrumbAdd(data, len, mask)