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Optional decryption of communication using keystream
[proxmark3-svn] / client / cmdlft55xx.c
diff --git a/client/cmdlft55xx.c b/client/cmdlft55xx.c
index 564ad29dbeb3ba29ccd98cb1c2c79f83a0d7a804..d4b72b3279bbbaf0844f0703334c1d016d6c4176 100644 (file)
--- a/client/cmdlft55xx.c
+++ b/client/cmdlft55xx.c
@@ -271,7 +271,6 @@ bool DecodeT55xxBlock(){
        //trim 1/2 a clock from beginning\r
        snprintf(cmdStr, sizeof(buf),"%d", bitRate[config.bitrate]/2 );\r
        CmdLtrim(cmdStr);\r
-\r
        switch( config.modulation ){\r
                case DEMOD_FSK:\r
                        snprintf(cmdStr, sizeof(buf),"%d %d", bitRate[config.bitrate], config.inverted );\r
@@ -337,8 +336,9 @@ bool tryDetectModulation(){
        uint8_t hits = 0;\r
        t55xx_conf_block_t tests[15];\r
        int bitRate=0;\r
+       uint8_t fc1 = 0, fc2 = 0, clk=0;\r
+       save_restoreGB(1);\r
        if (GetFskClock("", FALSE, FALSE)){ \r
-               uint8_t fc1 = 0, fc2 = 0, clk=0;\r
                fskClocks(&fc1, &fc2, &clk, FALSE);\r
                sprintf(cmdStr,"%d", clk/2);\r
                CmdLtrim(cmdStr);\r
@@ -366,91 +366,105 @@ bool tryDetectModulation(){
                        ++hits;\r
                }\r
        } else {\r
-               if ( ASKDemod("0 0 1", FALSE, FALSE, 1) && test(DEMOD_ASK, &tests[hits].offset, &bitRate)) {\r
-                       tests[hits].modulation = DEMOD_ASK;\r
-                       tests[hits].bitrate = bitRate;\r
-                       tests[hits].inverted = FALSE;\r
-                       tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
-                       ++hits;\r
-               }\r
-\r
-               if ( ASKDemod("0 1 1", FALSE, FALSE, 1)  && test(DEMOD_ASK, &tests[hits].offset, &bitRate)) {\r
-                       tests[hits].modulation = DEMOD_ASK;\r
-                       tests[hits].bitrate = bitRate;\r
-                       tests[hits].inverted = TRUE;\r
-                       tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
-                       ++hits;\r
-               }\r
-               \r
-               if ( NRZrawDemod("0 0 1", FALSE)  && test(DEMOD_NRZ, &tests[hits].offset, &bitRate)) {\r
-                       tests[hits].modulation = DEMOD_NRZ;\r
-                       tests[hits].bitrate = bitRate;\r
-                       tests[hits].inverted = FALSE;\r
-                       tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
-                       ++hits;\r
+               clk = GetAskClock("", FALSE, FALSE);\r
+               if (clk>0) {\r
+                       sprintf(cmdStr,"%d", clk/2);\r
+                       CmdLtrim(cmdStr);\r
+                       if ( ASKDemod("0 0 0", FALSE, FALSE, 1) && test(DEMOD_ASK, &tests[hits].offset, &bitRate)) {\r
+                               tests[hits].modulation = DEMOD_ASK;\r
+                               tests[hits].bitrate = bitRate;\r
+                               tests[hits].inverted = FALSE;\r
+                               tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
+                               ++hits;\r
+                       }\r
+                       if ( ASKDemod("0 1 0", FALSE, FALSE, 1)  && test(DEMOD_ASK, &tests[hits].offset, &bitRate)) {\r
+                               tests[hits].modulation = DEMOD_ASK;\r
+                               tests[hits].bitrate = bitRate;\r
+                               tests[hits].inverted = TRUE;\r
+                               tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
+                               ++hits;\r
+                       }\r
+                       if ( ASKbiphaseDemod("0 0 0 0", FALSE) && test(DEMOD_BI, &tests[hits].offset, &bitRate) ) {\r
+                               tests[hits].modulation = DEMOD_BI;\r
+                               tests[hits].bitrate = bitRate;\r
+                               tests[hits].inverted = FALSE;\r
+                               tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
+                               ++hits;\r
+                       }\r
+                       if ( ASKbiphaseDemod("0 0 1 0", FALSE) && test(DEMOD_BIa, &tests[hits].offset, &bitRate) ) {\r
+                               tests[hits].modulation = DEMOD_BIa;\r
+                               tests[hits].bitrate = bitRate;\r
+                               tests[hits].inverted = TRUE;\r
+                               tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
+                               ++hits;\r
+                       }\r
                }\r
+               //undo trim from ask\r
+               save_restoreGB(0);\r
+               clk = GetNrzClock("", FALSE, FALSE);\r
+               if (clk>0) {\r
+                       sprintf(cmdStr,"%d", clk/2);\r
+                       CmdLtrim(cmdStr);\r
+                       if ( NRZrawDemod("0 0 1", FALSE)  && test(DEMOD_NRZ, &tests[hits].offset, &bitRate)) {\r
+                               tests[hits].modulation = DEMOD_NRZ;\r
+                               tests[hits].bitrate = bitRate;\r
+                               tests[hits].inverted = FALSE;\r
+                               tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
+                               ++hits;\r
+                       }\r
 \r
-               if ( NRZrawDemod("0 1 1", FALSE)  && test(DEMOD_NRZ, &tests[hits].offset, &bitRate)) {\r
-                       tests[hits].modulation = DEMOD_NRZ;\r
-                       tests[hits].bitrate = bitRate;\r
-                       tests[hits].inverted = TRUE;\r
-                       tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
-                       ++hits;\r
-               }\r
-               \r
-               if ( PSKDemod("0 0 1", FALSE) && test(DEMOD_PSK1, &tests[hits].offset, &bitRate)) {\r
-                       tests[hits].modulation = DEMOD_PSK1;\r
-                       tests[hits].bitrate = bitRate;\r
-                       tests[hits].inverted = FALSE;\r
-                       tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
-                       ++hits;\r
+                       if ( NRZrawDemod("0 1 1", FALSE)  && test(DEMOD_NRZ, &tests[hits].offset, &bitRate)) {\r
+                               tests[hits].modulation = DEMOD_NRZ;\r
+                               tests[hits].bitrate = bitRate;\r
+                               tests[hits].inverted = TRUE;\r
+                               tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
+                               ++hits;\r
+                       }\r
                }\r
                \r
-               if ( PSKDemod("0 1 1", FALSE) && test(DEMOD_PSK1, &tests[hits].offset, &bitRate)) {\r
-                       tests[hits].modulation = DEMOD_PSK1;\r
-                       tests[hits].bitrate = bitRate;\r
-                       tests[hits].inverted = TRUE;\r
-                       tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
-                       ++hits;\r
-               }\r
-\r
-               // PSK2 - needs a call to psk1TOpsk2.\r
-               if ( PSKDemod("0 0 1", FALSE)) {\r
-                       psk1TOpsk2(DemodBuffer, DemodBufferLen);\r
-                       if (test(DEMOD_PSK2, &tests[hits].offset, &bitRate)){\r
-                               tests[hits].modulation = DEMOD_PSK2;\r
+               //undo trim from nrz\r
+               save_restoreGB(0);\r
+               clk = GetPskClock("", FALSE, FALSE);\r
+               if (clk>0) {\r
+                       PrintAndLog("clk %d",clk);\r
+                       sprintf(cmdStr,"%d", clk/2);\r
+                       CmdLtrim(cmdStr);       \r
+                       if ( PSKDemod("0 0 1", FALSE) && test(DEMOD_PSK1, &tests[hits].offset, &bitRate)) {\r
+                               tests[hits].modulation = DEMOD_PSK1;\r
                                tests[hits].bitrate = bitRate;\r
                                tests[hits].inverted = FALSE;\r
                                tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
                                ++hits;\r
                        }\r
-               } // inverse waves does not affect this demod\r
-\r
-               // PSK3 - needs a call to psk1TOpsk2.\r
-               if ( PSKDemod("0 0 1", FALSE)) {\r
-                       psk1TOpsk2(DemodBuffer, DemodBufferLen);\r
-                       if (test(DEMOD_PSK3, &tests[hits].offset, &bitRate)){\r
-                               tests[hits].modulation = DEMOD_PSK3;\r
+                       if ( PSKDemod("0 1 1", FALSE) && test(DEMOD_PSK1, &tests[hits].offset, &bitRate)) {\r
+                               tests[hits].modulation = DEMOD_PSK1;\r
                                tests[hits].bitrate = bitRate;\r
-                               tests[hits].inverted = FALSE;\r
+                               tests[hits].inverted = TRUE;\r
                                tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
                                ++hits;\r
                        }\r
-               } // inverse waves does not affect this demod\r
-       \r
-               if ( ASKbiphaseDemod("0 0 0 1", FALSE) && test(DEMOD_BI, &tests[hits].offset, &bitRate) ) {\r
-                       tests[hits].modulation = DEMOD_BI;\r
-                       tests[hits].bitrate = bitRate;\r
-                       tests[hits].inverted = FALSE;\r
-                       tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
-                       ++hits;\r
-               }\r
-               if ( ASKbiphaseDemod("0 0 1 1", FALSE) && test(DEMOD_BIa, &tests[hits].offset, &bitRate) ) {\r
-                       tests[hits].modulation = DEMOD_BIa;\r
-                       tests[hits].bitrate = bitRate;\r
-                       tests[hits].inverted = TRUE;\r
-                       tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
-                       ++hits;\r
+                       // PSK2 - needs a call to psk1TOpsk2.\r
+                       if ( PSKDemod("0 0 1", FALSE)) {\r
+                               psk1TOpsk2(DemodBuffer, DemodBufferLen);\r
+                               if (test(DEMOD_PSK2, &tests[hits].offset, &bitRate)){\r
+                                       tests[hits].modulation = DEMOD_PSK2;\r
+                                       tests[hits].bitrate = bitRate;\r
+                                       tests[hits].inverted = FALSE;\r
+                                       tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
+                                       ++hits;\r
+                               }\r
+                       } // inverse waves does not affect this demod\r
+                       // PSK3 - needs a call to psk1TOpsk2.\r
+                       if ( PSKDemod("0 0 1", FALSE)) {\r
+                               psk1TOpsk2(DemodBuffer, DemodBufferLen);\r
+                               if (test(DEMOD_PSK3, &tests[hits].offset, &bitRate)){\r
+                                       tests[hits].modulation = DEMOD_PSK3;\r
+                                       tests[hits].bitrate = bitRate;\r
+                                       tests[hits].inverted = FALSE;\r
+                                       tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);\r
+                                       ++hits;\r
+                               }\r
+                       } // inverse waves does not affect this demod\r
                }\r
        }               \r
        if ( hits == 1) {\r
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