X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/fb2d24882e31c4a9915a87e28081c3f7d6f3bea4..62f0edfb8ea6f6c6a087bb54769dc717b0eeaecb:/armsrc/epa.c?ds=inline diff --git a/armsrc/epa.c b/armsrc/epa.c index 9012bf11..68061512 100644 --- a/armsrc/epa.c +++ b/armsrc/epa.c @@ -5,7 +5,7 @@ // at your option, any later version. See the LICENSE.txt file for the text of // the license. //----------------------------------------------------------------------------- -// Routines to support the German eletronic "Personalausweis" (ID card) +// Routines to support the German electronic "Personalausweis" (ID card) // Note that the functions which do not implement USB commands do NOT initialize // the card (with iso14443a_select_card etc.). If You want to use these // functions, You need to do the setup before calling them! @@ -13,8 +13,7 @@ #include "iso14443a.h" #include "epa.h" -#include "../common/cmd.h" - +#include "cmd.h" // Protocol and Parameter Selection Request // use regular (1x) speed in both directions @@ -75,6 +74,32 @@ static const uint8_t oid_pace_start[] = { 0x04 // id-PACE }; +// APDUs for replaying: +// MSE: Set AT (initiate PACE) +static uint8_t apdu_replay_mse_set_at_pace[41]; +// General Authenticate (Get Nonce) +static uint8_t apdu_replay_general_authenticate_pace_get_nonce[8]; +// General Authenticate (Map Nonce) +static uint8_t apdu_replay_general_authenticate_pace_map_nonce[75]; +// General Authenticate (Mutual Authenticate) +static uint8_t apdu_replay_general_authenticate_pace_mutual_authenticate[75]; +// General Authenticate (Perform Key Agreement) +static uint8_t apdu_replay_general_authenticate_pace_perform_key_agreement[18]; +// pointers to the APDUs (for iterations) +static struct { + uint8_t len; + uint8_t *data; +} const apdus_replay[] = { + {sizeof(apdu_replay_mse_set_at_pace), apdu_replay_mse_set_at_pace}, + {sizeof(apdu_replay_general_authenticate_pace_get_nonce), apdu_replay_general_authenticate_pace_get_nonce}, + {sizeof(apdu_replay_general_authenticate_pace_map_nonce), apdu_replay_general_authenticate_pace_map_nonce}, + {sizeof(apdu_replay_general_authenticate_pace_mutual_authenticate), apdu_replay_general_authenticate_pace_mutual_authenticate}, + {sizeof(apdu_replay_general_authenticate_pace_perform_key_agreement), apdu_replay_general_authenticate_pace_perform_key_agreement} +}; + +// lengths of the replay APDUs +static uint8_t apdu_lengths_replay[5]; + //----------------------------------------------------------------------------- // Closes the communication channel and turns off the field //----------------------------------------------------------------------------- @@ -216,11 +241,6 @@ int EPA_Read_CardAccess(uint8_t *buffer, size_t max_length) //----------------------------------------------------------------------------- static void EPA_PACE_Collect_Nonce_Abort(uint8_t step, int func_return) { -// // step in which the failure occured -// ack->arg[0] = step; -// // last return code -// ack->arg[1] = func_return; - // power down the field EPA_Finish(); @@ -247,15 +267,10 @@ void EPA_PACE_Collect_Nonce(UsbCommand *c) // return value of a function int func_return = 0; -// // initialize ack with 0s -// memset(ack->arg, 0, 12); -// memset(ack->d.asBytes, 0, 48); - // set up communication func_return = EPA_Setup(); if (func_return != 0) { EPA_PACE_Collect_Nonce_Abort(1, func_return); - Dbprintf("epa: setup fucked up! %d", func_return); return; } @@ -265,13 +280,10 @@ void EPA_PACE_Collect_Nonce(UsbCommand *c) int card_access_length = EPA_Read_CardAccess(card_access, 256); // the response has to be at least this big to hold the OID if (card_access_length < 18) { - Dbprintf("epa: Too small!"); EPA_PACE_Collect_Nonce_Abort(2, card_access_length); return; } - Dbprintf("epa: foo!"); - // this will hold the PACE info of the card pace_version_info_t pace_version_info; // search for the PACE OID @@ -283,8 +295,6 @@ void EPA_PACE_Collect_Nonce(UsbCommand *c) return; } - Dbprintf("epa: bar!"); - // initiate the PACE protocol // use the CAN for the password since that doesn't change func_return = EPA_PACE_MSE_Set_AT(pace_version_info, 2); @@ -304,8 +314,6 @@ void EPA_PACE_Collect_Nonce(UsbCommand *c) EPA_Finish(); // save received information -// ack->arg[1] = func_return; -// memcpy(ack->d.asBytes, nonce, func_return); cmd_send(CMD_ACK,0,func_return,0,nonce,func_return); } @@ -414,13 +422,79 @@ int EPA_PACE_MSE_Set_AT(pace_version_info_t pace_version_info, uint8_t password) return 0; } +//----------------------------------------------------------------------------- +// Perform the PACE protocol by replaying given APDUs +//----------------------------------------------------------------------------- +void EPA_PACE_Replay(UsbCommand *c) +{ + uint32_t timings[sizeof(apdu_lengths_replay) / sizeof(apdu_lengths_replay[0])] = {0}; + + // if an APDU has been passed, save it + if (c->arg[0] != 0) { + // make sure it's not too big + if(c->arg[2] > apdus_replay[c->arg[0] - 1].len) + { + cmd_send(CMD_ACK, 1, 0, 0, NULL, 0); + } + memcpy(apdus_replay[c->arg[0] - 1].data + c->arg[1], + c->d.asBytes, + c->arg[2]); + // save/update APDU length + if (c->arg[1] == 0) { + apdu_lengths_replay[c->arg[0] - 1] = c->arg[2]; + } else { + apdu_lengths_replay[c->arg[0] - 1] += c->arg[2]; + } + cmd_send(CMD_ACK, 0, 0, 0, NULL, 0); + return; + } + + // return value of a function + int func_return; + + // set up communication + func_return = EPA_Setup(); + if (func_return != 0) { + EPA_Finish(); + cmd_send(CMD_ACK, 2, func_return, 0, NULL, 0); + return; + } + + // increase the timeout (at least some cards really do need this!)///////////// + // iso14a_set_timeout(0x0003FFFF); + + // response APDU + uint8_t response_apdu[300] = {0}; + + // now replay the data and measure the timings + for (int i = 0; i < sizeof(apdu_lengths_replay); i++) { + StartCountUS(); + func_return = iso14_apdu(apdus_replay[i].data, + apdu_lengths_replay[i], + response_apdu); + timings[i] = GetCountUS(); + // every step but the last one should succeed + if (i < sizeof(apdu_lengths_replay) - 1 + && (func_return < 6 + || response_apdu[func_return - 4] != 0x90 + || response_apdu[func_return - 3] != 0x00)) + { + EPA_Finish(); + cmd_send(CMD_ACK, 3 + i, func_return, 0, timings, 20); + return; + } + } + EPA_Finish(); + cmd_send(CMD_ACK,0,0,0,timings,20); + return; +} + //----------------------------------------------------------------------------- // Set up a communication channel (Card Select, PPS) // Returns 0 on success or a non-zero error code on failure //----------------------------------------------------------------------------- int EPA_Setup() { - int return_code = 0; uint8_t uid[10]; uint8_t pps_response[3]; @@ -429,20 +503,16 @@ int EPA_Setup() // power up the field iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD); - // select the card return_code = iso14443a_select_card(uid, &card_select_info, NULL); if (return_code != 1) { - Dbprintf("Epa: Can't select card"); return 1; } - // send the PPS request ReaderTransmit((uint8_t *)pps, sizeof(pps), NULL); return_code = ReaderReceive(pps_response, pps_response_par); if (return_code != 3 || pps_response[0] != 0xD0) { return return_code == 0 ? 2 : return_code; } - return 0; -} \ No newline at end of file +}