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Merge pull request #2912 from Antiklesys/master

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Improved sam response parsing
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Iceman 2025-06-20 10:49:03 +02:00 • committed by GitHub
commit cfe9c39b89
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1 changed files with 30 additions and 2 deletions
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30
client/src/cmdhficlass.c
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@ -5886,6 +5886,15 @@ static int CmdHFiClassConfigCard(const char *Cmd) {
return PM3_SUCCESS;
}
static bool match_with_wildcard(const uint8_t *data, const uint8_t *pattern, const bool *mask, size_t length) {
for (size_t i = 0; i < length; ++i) {
if (mask[i] && data[i] != pattern[i]) {
return false;
}
}
return true;
}
static int CmdHFiClassSAM(const char *Cmd) {
CLIParserContext *ctx;
CLIParserInit(&ctx, "hf iclass sam",
@ -5964,6 +5973,12 @@ static int CmdHFiClassSAM(const char *Cmd) {
PacketResponseNG resp;
WaitForResponse(CMD_HF_SAM_PICOPASS, &resp);
bool is_snmp = false;
uint8_t snmp_pattern[] = {0xBD, 0x81, 0xFF, 0x8A, 0x81, 0xFF}; // SNMP Response header pattern, 0xFF is a wildcard value for message length
bool snmp_mask[] = {true, true, false, true, true, false}; // false means wildcard value in that position
uint8_t ack_pattern[] = {0xBD, 0xFF, 0x8A}; // Acknowledge Response header pattern, 0xFF is a wildcard value for message length
bool ack_mask[] = {true, false, true}; // false means wildcard value in that position
switch (resp.status) {
case PM3_SUCCESS:
break;
@ -6022,11 +6037,24 @@ static int CmdHFiClassSAM(const char *Cmd) {
PrintAndLogEx(SUCCESS, " hf iclass dump --nr -k %s", sprint_hex_inrow(d + 1, 8));
}
} else {
//if it is an error decode it
if (memcmp(d, "\xBE\x07\x80\x01", 4) == 0) { //if it the string is 0xbe 0x07 0x80 0x01 the next byte will indicate the error code
PrintAndLogEx(ERR,_RED_("Sam Error Code: %02x"), d[4]);
print_hex(d, resp.length);
}else if (match_with_wildcard(d, snmp_pattern, snmp_mask, 6)){
is_snmp = true;
PrintAndLogEx(SUCCESS, _YELLOW_("[samSNMPMessageResponse] ")"%s", sprint_hex(d + 6, resp.length - 6));
}else if (match_with_wildcard(d,ack_pattern, ack_mask, 3)){
PrintAndLogEx(SUCCESS, _YELLOW_("[samResponseAcknowledge] ")"%s", sprint_hex(d + 4, resp.length - 4));
}else{
print_hex(d, resp.length);
}
}
if (decodeTLV) {
if (decodeTLV && is_snmp == false) {
asn1_print(d, d[1] + 2, " ");
} else if (decodeTLV && is_snmp){
asn1_print(d + 6, resp.length - 6, " ");
}
return PM3_SUCCESS;