`hf emv challenge` works

diff --git a/client/emv/cmdemv.c b/client/emv/cmdemv.c
index 030eaa0b5ae28fabe83544594c82ea328059b6a3..3114c46a7c0ffdbf91974ed22656ff435233dea0 100644 (file)
--- a/client/emv/cmdemv.c
+++ b/client/emv/cmdemv.c
@@ -321,6 +321,41 @@ int CmdHFEMVAC(const char *cmd) {
 
 int CmdHFEMVGenerateChallenge(const char *cmd) {
 
+       CLIParserInit("hf 14a challenge", 
+               "Executes Generate Challenge command. It returns 4-byte random number from card:\n", 
+               "Usage:\n\thf emv challenge -> get challenge\n\thf emv challenge -k -> get challenge, keep fileld ON\n");
+
+       void* argtable[] = {
+               arg_param_begin,
+               arg_lit0("kK",  "keep",    "keep field ON for next command"),
+               arg_lit0("aA",  "apdu",    "show APDU reqests and responses"),
+               arg_param_end
+       };
+       CLIExecWithReturn(cmd, argtable, true);
+       
+       bool leaveSignalON = arg_get_lit(1);
+       bool APDULogging = arg_get_lit(2);
+       CLIParserFree();        
+       
+       SetAPDULogging(APDULogging);
+       
+       // exec
+       uint8_t buf[APDU_RES_LEN] = {0};
+       size_t len = 0;
+       uint16_t sw = 0;
+       int res = EMVGenerateChallenge(leaveSignalON, buf, sizeof(buf), &len, &sw, NULL);
+       
+       if (sw)
+               PrintAndLog("APDU response status: %04x - %s", sw, GetAPDUCodeDescription(sw >> 8, sw & 0xff)); 
+
+       if (res)
+               return res;
+
+       PrintAndLog("Challenge: %s", sprint_hex(buf, len));
+       
+       if (len != 4 && len != 8)
+               PrintAndLog("WARNING: length of challenge must be 4 or 8, but it %d", len);
+       
        return 0;
 }