hitag2 write (#310)
authorHenrik Johansson <henrik@johome.net>
Wed, 5 Jul 2017 18:16:54 +0000 (20:16 +0200)
committerpwpiwi <pwpiwi@users.noreply.github.com>
Wed, 5 Jul 2017 18:16:54 +0000 (20:16 +0200)
Usage is similar to hitagS write: lf hitag write 24 KEY pagenumber 32bitvalue
* added changlelog entry

CHANGELOG.md
armsrc/appmain.c
armsrc/apps.h
armsrc/hitag2.c
client/cmdlfhitag.c
include/hitag2.h

index 5df98dd637127df15aac37098197a2de78980f0e..045d9b2db926f87f3359ffd8b82564f11fab5c7e 100644 (file)
@@ -22,6 +22,9 @@ This project uses the changelog in accordance with [keepchangelog](http://keepac
 
 ## [3.0.0][2017-06-05]
 
+### Added
+- Added lf hitag write 24, the command writes a block to hitag2 tags in crypto mode (henjo)
+
 ### Added
 - Added hf mf hardnested, an attack working for hardened Mifare cards (EV1, Mifare Plus SL1) where hf mf nested fails
 - Added experimental testmode write option for t55xx (danger) (marshmellow)
index 30d5ed58aed840731bc2e462247fe4d57dde6b42..4411a0c54915778a9a29bd1dc3e2245079773c83 100644 (file)
@@ -1051,7 +1051,12 @@ void UsbPacketReceived(uint8_t *packet, int len)
                        ReadHitagS((hitag_function)c->arg[0],(hitag_data*)c->d.asBytes);
                        break;
                case CMD_WR_HITAG_S://writer for Hitag tags args=data to write,page and key or challenge
-                       WritePageHitagS((hitag_function)c->arg[0],(hitag_data*)c->d.asBytes,c->arg[2]);
+                       if ((hitag_function)c->arg[0] < 10) {
+                               WritePageHitagS((hitag_function)c->arg[0],(hitag_data*)c->d.asBytes,c->arg[2]);
+                       }
+                       else if ((hitag_function)c->arg[0] >= 10) {
+                         WriterHitag((hitag_function)c->arg[0],(hitag_data*)c->d.asBytes, c->arg[2]);
+                       }
                        break;
 #endif
 
index 1f140587d2842184afdda11a48284e3065818005..aa5b47fb4ed947700adfb144e6901130860b2128 100644 (file)
@@ -182,6 +182,7 @@ void iClass_ReadCheck(uint8_t       blockNo, uint8_t keyType);
 void SnoopHitag(uint32_t type);
 void SimulateHitagTag(bool tag_mem_supplied, byte_t* data);
 void ReaderHitag(hitag_function htf, hitag_data* htd);
+void WriterHitag(hitag_function htf, hitag_data* htd, int page);
 
 //hitagS.h
 void SimulateHitagSTag(bool tag_mem_supplied, byte_t* data);
index dd0211da98785ce6dbbf381193ae4371eb4c8714..7702025b130a57aeca1c62f3cf18e106b56e6c15 100644 (file)
@@ -64,6 +64,13 @@ static struct hitag2_tag tag = {
     },
 };
 
+static enum {
+       WRITE_STATE_START = 0x0,
+       WRITE_STATE_PAGENUM_WRITTEN,
+       WRITE_STATE_PROG
+} writestate;
+       
+
 // ToDo: define a meaningful maximum size for auth_table. The bigger this is, the lower will be the available memory for traces. 
 // Historically it used to be FREE_BUFFER_SIZE, which was 2744.
 #define AUTH_TABLE_LENGTH 2744
@@ -74,6 +81,7 @@ static size_t auth_table_len = AUTH_TABLE_LENGTH;
 static byte_t password[4];
 static byte_t NrAr[8];
 static byte_t key[8];
+static byte_t writedata[4];
 static uint64_t cipher_state;
 
 /* Following is a modified version of cryptolib.com/ciphers/hitag2/ */
@@ -106,13 +114,13 @@ static const u32 ht2_f5c = 0x7907287B;    // 0111 1001 0000 0111 0010 1000 0111 101
 
 static u32 _f20 (const u64 x)
 {
-       u32                                     i5;
-
+       u32                                     i5;
+       
        i5 = ((ht2_f4a >> i4 (x, 1, 2, 4, 5)) & 1)* 1
-          + ((ht2_f4b >> i4 (x, 7,11,13,14)) & 1)* 2
-          + ((ht2_f4b >> i4 (x,16,20,22,25)) & 1)* 4
-          + ((ht2_f4b >> i4 (x,27,28,30,32)) & 1)* 8
-          + ((ht2_f4a >> i4 (x,33,42,43,45)) & 1)*16;
+               + ((ht2_f4b >> i4 (x, 7,11,13,14)) & 1)* 2
+               + ((ht2_f4b >> i4 (x,16,20,22,25)) & 1)* 4
+               + ((ht2_f4b >> i4 (x,27,28,30,32)) & 1)* 8
+               + ((ht2_f4a >> i4 (x,33,42,43,45)) & 1)*16;
 
        return (ht2_f5c >> i5) & 1;
 }
@@ -135,10 +143,10 @@ static u64 _hitag2_round (u64 *state)
        u64                                     x = *state;
 
        x = (x >>  1) +
-        ((((x >>  0) ^ (x >>  2) ^ (x >>  3) ^ (x >>  6)
-         ^ (x >>  7) ^ (x >>  8) ^ (x >> 16) ^ (x >> 22)
-         ^ (x >> 23) ^ (x >> 26) ^ (x >> 30) ^ (x >> 41)
-         ^ (x >> 42) ^ (x >> 43) ^ (x >> 46) ^ (x >> 47)) & 1) << 47);
+               ((((x >>  0) ^ (x >>  2) ^ (x >>  3) ^ (x >>  6)
+                  ^ (x >>  7) ^ (x >>  8) ^ (x >> 16) ^ (x >> 22)
+                  ^ (x >> 23) ^ (x >> 26) ^ (x >> 30) ^ (x >> 41)
+                  ^ (x >> 42) ^ (x >> 43) ^ (x >> 46) ^ (x >> 47)) & 1) << 47);
 
        *state = x;
        return _f20 (x);
@@ -169,19 +177,19 @@ static int hitag2_init(void)
 static void hitag2_cipher_reset(struct hitag2_tag *tag, const byte_t *iv)
 {
        uint64_t key =  ((uint64_t)tag->sectors[2][2]) |
-                  ((uint64_t)tag->sectors[2][3] << 8) |
-                  ((uint64_t)tag->sectors[1][0] << 16) |
-                  ((uint64_t)tag->sectors[1][1] << 24) |
-                  ((uint64_t)tag->sectors[1][2] << 32) |
-                  ((uint64_t)tag->sectors[1][3] << 40);
+               ((uint64_t)tag->sectors[2][3] << 8) |
+               ((uint64_t)tag->sectors[1][0] << 16) |
+               ((uint64_t)tag->sectors[1][1] << 24) |
+               ((uint64_t)tag->sectors[1][2] << 32) |
+               ((uint64_t)tag->sectors[1][3] << 40);
        uint32_t uid =  ((uint32_t)tag->sectors[0][0]) |
-                  ((uint32_t)tag->sectors[0][1] << 8) |
-                  ((uint32_t)tag->sectors[0][2] << 16) |
-                  ((uint32_t)tag->sectors[0][3] << 24);
+               ((uint32_t)tag->sectors[0][1] << 8) |
+               ((uint32_t)tag->sectors[0][2] << 16) |
+               ((uint32_t)tag->sectors[0][3] << 24);
        uint32_t iv_ = (((uint32_t)(iv[0]))) |
-                       (((uint32_t)(iv[1])) << 8) |
-                       (((uint32_t)(iv[2])) << 16) |
-                       (((uint32_t)(iv[3])) << 24);
+               (((uint32_t)(iv[1])) << 8) |
+               (((uint32_t)(iv[2])) << 16) |
+               (((uint32_t)(iv[3])) << 24);
        tag->cs = _hitag2_init(rev64(key), rev32(uid), rev32(iv_));
 }
 
@@ -222,6 +230,7 @@ static int hitag2_cipher_transcrypt(uint64_t* cs, byte_t *data, unsigned int byt
 #define HITAG_T_WAIT_1 200 /* T_wresp should be 199..206 */
 #define HITAG_T_WAIT_2 90 /* T_wresp should be 199..206 */
 #define HITAG_T_WAIT_MAX 300 /* bit more than HITAG_T_WAIT_1 + HITAG_T_WAIT_2 */
+#define HITAG_T_PROG 614
 
 #define HITAG_T_TAG_ONE_HALF_PERIOD                    10
 #define HITAG_T_TAG_TWO_HALF_PERIOD                    25
@@ -293,105 +302,105 @@ static void hitag2_handle_reader_command(byte_t* rx, const size_t rxlen, byte_t*
        // Try to find out which command was send by selecting on length (in bits)
        switch (rxlen) {
                // Received 11000 from the reader, request for UID, send UID 
-               case 05: {
-                       // Always send over the air in the clear plaintext mode
-                       if(rx_air[0] != 0xC0) {
-                               // Unknown frame ?
-                               return;
-                       }
-                       *txlen = 32;
-                       memcpy(tx,tag.sectors[0],4);
-                       tag.crypto_active = 0;
+       case 05: {
+               // Always send over the air in the clear plaintext mode
+               if(rx_air[0] != 0xC0) {
+                       // Unknown frame ?
+                       return;
                }
+               *txlen = 32;
+               memcpy(tx,tag.sectors[0],4);
+               tag.crypto_active = 0;
+       }
                break;
 
                // Read/Write command: ..xx x..y  yy with yyy == ~xxx, xxx is sector number 
-               case 10: {
-                       unsigned int sector = (~( ((rx[0]<<2)&0x04) | ((rx[1]>>6)&0x03) ) & 0x07);
-                       // Verify complement of sector index
-                       if(sector != ((rx[0]>>3)&0x07)) {
-                               //DbpString("Transmission error (read/write)");
-                               return;
-                       }
+       case 10: {
+               unsigned int sector = (~( ((rx[0]<<2)&0x04) | ((rx[1]>>6)&0x03) ) & 0x07);
+               // Verify complement of sector index
+               if(sector != ((rx[0]>>3)&0x07)) {
+                       //DbpString("Transmission error (read/write)");
+                       return;
+               }
 
-                       switch (rx[0] & 0xC6) {
-                               // Read command: 11xx x00y
-                               case 0xC0:
-                                       memcpy(tx,tag.sectors[sector],4);
-                                       *txlen = 32;
-                               break;
+               switch (rx[0] & 0xC6) {
+                       // Read command: 11xx x00y
+               case 0xC0:
+                       memcpy(tx,tag.sectors[sector],4);
+                       *txlen = 32;
+                       break;
                                        
-                                // Inverted Read command: 01xx x10y
-                               case 0x44:
-                                       for (size_t i=0; i<4; i++) {
-                                               tx[i] = tag.sectors[sector][i] ^ 0xff;
-                                       }
-                                       *txlen = 32;
-                               break;
-
-                               // Write command: 10xx x01y
-                               case 0x82:
-                                       // Prepare write, acknowledge by repeating command
-                                       memcpy(tx,rx,nbytes(rxlen));
-                                       *txlen = rxlen;
-                                       tag.active_sector = sector;
-                                       tag.state=TAG_STATE_WRITING;
-                               break;
-                               
-                               // Unknown command
-                               default:
-                                       Dbprintf("Unknown command: %02x %02x",rx[0],rx[1]);
-                                       return;
-                               break;
+                       // Inverted Read command: 01xx x10y
+               case 0x44:
+                       for (size_t i=0; i<4; i++) {
+                               tx[i] = tag.sectors[sector][i] ^ 0xff;
                        }
+                       *txlen = 32;
+                       break;
+
+                       // Write command: 10xx x01y
+               case 0x82:
+                       // Prepare write, acknowledge by repeating command
+                       memcpy(tx,rx,nbytes(rxlen));
+                       *txlen = rxlen;
+                       tag.active_sector = sector;
+                       tag.state=TAG_STATE_WRITING;
+                       break;
+                               
+                       // Unknown command
+               default:
+                       Dbprintf("Unknown command: %02x %02x",rx[0],rx[1]);
+                       return;
+                       break;
                }
+       }
                break;
 
                // Writing data or Reader password
-               case 32: {
-                       if(tag.state == TAG_STATE_WRITING) {
-                               // These are the sector contents to be written. We don't have to do anything else.
-                               memcpy(tag.sectors[tag.active_sector],rx,nbytes(rxlen));
-                               tag.state=TAG_STATE_RESET;
+       case 32: {
+               if(tag.state == TAG_STATE_WRITING) {
+                       // These are the sector contents to be written. We don't have to do anything else.
+                       memcpy(tag.sectors[tag.active_sector],rx,nbytes(rxlen));
+                       tag.state=TAG_STATE_RESET;
+                       return;
+               } else {
+                       // Received RWD password, respond with configuration and our password
+                       if(memcmp(rx,tag.sectors[1],4) != 0) {
+                               DbpString("Reader password is wrong");
                                return;
-                       } else {
-                               // Received RWD password, respond with configuration and our password
-                               if(memcmp(rx,tag.sectors[1],4) != 0) {
-                                       DbpString("Reader password is wrong");
-                                       return;
-                               }
-                               *txlen = 32;
-                               memcpy(tx,tag.sectors[3],4);
                        }
+                       *txlen = 32;
+                       memcpy(tx,tag.sectors[3],4);
                }
+       }
                break;
 
                // Received RWD authentication challenge and respnse
-               case 64: {
-                       // Store the authentication attempt
-                       if (auth_table_len < (AUTH_TABLE_LENGTH-8)) {
-                               memcpy(auth_table+auth_table_len,rx,8);
-                               auth_table_len += 8;
-                       }
+       case 64: {
+               // Store the authentication attempt
+               if (auth_table_len < (AUTH_TABLE_LENGTH-8)) {
+                       memcpy(auth_table+auth_table_len,rx,8);
+                       auth_table_len += 8;
+               }
 
-                       // Reset the cipher state
-                       hitag2_cipher_reset(&tag,rx);
-                       // Check if the authentication was correct
-                       if(!hitag2_cipher_authenticate(&(tag.cs),rx+4)) {
-                               // The reader failed to authenticate, do nothing
-                               Dbprintf("auth: %02x%02x%02x%02x%02x%02x%02x%02x Failed!",rx[0],rx[1],rx[2],rx[3],rx[4],rx[5],rx[6],rx[7]);
-                               return;
-                       }
-                       // Succesful, but commented out reporting back to the Host, this may delay to much.
-                       // Dbprintf("auth: %02x%02x%02x%02x%02x%02x%02x%02x OK!",rx[0],rx[1],rx[2],rx[3],rx[4],rx[5],rx[6],rx[7]);
+               // Reset the cipher state
+               hitag2_cipher_reset(&tag,rx);
+               // Check if the authentication was correct
+               if(!hitag2_cipher_authenticate(&(tag.cs),rx+4)) {
+                       // The reader failed to authenticate, do nothing
+                       Dbprintf("auth: %02x%02x%02x%02x%02x%02x%02x%02x Failed!",rx[0],rx[1],rx[2],rx[3],rx[4],rx[5],rx[6],rx[7]);
+                       return;
+               }
+               // Succesful, but commented out reporting back to the Host, this may delay to much.
+               // Dbprintf("auth: %02x%02x%02x%02x%02x%02x%02x%02x OK!",rx[0],rx[1],rx[2],rx[3],rx[4],rx[5],rx[6],rx[7]);
 
-                       // Activate encryption algorithm for all further communication
-                       tag.crypto_active = 1;
+               // Activate encryption algorithm for all further communication
+               tag.crypto_active = 1;
 
-                       // Use the tag password as response
-                       memcpy(tx,tag.sectors[3],4);
-                       *txlen = 32;
-               }
+               // Use the tag password as response
+               memcpy(tx,tag.sectors[3],4);
+               *txlen = 32;
+       }
                break;
        }
 
@@ -459,25 +468,25 @@ static bool hitag2_password(byte_t* rx, const size_t rxlen, byte_t* tx, size_t*
        // Try to find out which command was send by selecting on length (in bits)
        switch (rxlen) {
                // No answer, try to resurrect
-               case 0: {
-                       // Stop if there is no answer (after sending password)
-                       if (bPwd) {
-                               DbpString("Password failed!");
-                               return false;
-                       }
-                       *txlen = 5;
-                       memcpy(tx,"\xc0",nbytes(*txlen));
-               } break;
+       case 0: {
+               // Stop if there is no answer (after sending password)
+               if (bPwd) {
+                       DbpString("Password failed!");
+                       return false;
+               }
+               *txlen = 5;
+               memcpy(tx,"\xc0",nbytes(*txlen));
+       } break;
                        
                // Received UID, tag password
-               case 32: {
-                       if (!bPwd) {
-                               *txlen = 32;
-                               memcpy(tx,password,4);
-                               bPwd = true;
-        memcpy(tag.sectors[blocknr],rx,4);
-        blocknr++;
-                       } else {
+       case 32: {
+               if (!bPwd) {
+                       *txlen = 32;
+                       memcpy(tx,password,4);
+                       bPwd = true;
+                       memcpy(tag.sectors[blocknr],rx,4);
+                       blocknr++;
+               } else {
                                
                        if(blocknr == 1){
                                //store password in block1, the TAG answers with Block3, but we need the password in memory
@@ -488,112 +497,173 @@ static bool hitag2_password(byte_t* rx, const size_t rxlen, byte_t* tx, size_t*
                        
                        blocknr++;
                        if (blocknr > 7) {
-                         DbpString("Read succesful!");
-        bSuccessful = true;
-                         return false;
+                               DbpString("Read succesful!");
+                               bSuccessful = true;
+                               return false;
                        }
                        *txlen = 10;
                        tx[0] = 0xc0 | (blocknr << 3) | ((blocknr^7) >> 2);
                        tx[1] = ((blocknr^7) << 6);
-                       }
-               } break;
+               }
+       } break;
                        
                // Unexpected response
-    default: {
-                       Dbprintf("Uknown frame length: %d",rxlen);
+       default: {
+               Dbprintf("Uknown frame length: %d",rxlen);
+               return false;
+       } break;
+       }
+       return true;
+}
+
+static bool hitag2_write_page(byte_t* rx, const size_t rxlen, byte_t* tx, size_t* txlen)
+{
+       switch (writestate) {
+       case WRITE_STATE_START:
+               *txlen = 10;
+               tx[0] = 0x82 | (blocknr << 3) | ((blocknr^7) >> 2);
+               tx[1] = ((blocknr^7) << 6);
+               writestate = WRITE_STATE_PAGENUM_WRITTEN;
+               break;
+       case WRITE_STATE_PAGENUM_WRITTEN:
+               // Check if page number was received correctly
+               if ((rxlen == 10) &&
+                   (rx[0] == (0x82 | (blocknr << 3) | ((blocknr^7) >> 2))) &&
+                   (rx[1] == (((blocknr & 0x3) ^ 0x3) << 6))) {
+                       *txlen = 32;
+                       memset(tx, 0, HITAG_FRAME_LEN);
+                       memcpy(tx, writedata, 4);
+                       writestate = WRITE_STATE_PROG;
+               } else {
+                       Dbprintf("hitag2_write_page: Page number was not received correctly: rxlen=%d rx=%02x%02x%02x%02x",
+                                rxlen, rx[0], rx[1], rx[2], rx[3]);
+                       bSuccessful = false;
                        return false;
-               } break;
+               }
+               break;
+       case WRITE_STATE_PROG:
+               if (rxlen == 0) {
+                       bSuccessful = true;
+               } else {
+                       bSuccessful = false;
+                       Dbprintf("hitag2_write_page: unexpected rx data (%d) after page write", rxlen);
+               }
+               return false;
+       default:
+               DbpString("hitag2_write_page: Unknown state %d");
+               bSuccessful = false;
+               return false;
        }
+
        return true;
 }
 
-static bool hitag2_crypto(byte_t* rx, const size_t rxlen, byte_t* tx, size_t* txlen) {
+static bool hitag2_crypto(byte_t* rx, const size_t rxlen, byte_t* tx, size_t* txlen, bool write) {
        // Reset the transmission frame length
        *txlen = 0;
        
-  if(bCrypto) {
+       if(bCrypto) {
                hitag2_cipher_transcrypt(&cipher_state,rx,rxlen/8,rxlen%8);
+
+       }
+
+       if (bCrypto && !bAuthenticating && write) {
+               if (!hitag2_write_page(rx, rxlen, tx, txlen)) {
+                       return false;
+               }
        }
+       else
+       {
 
        // Try to find out which command was send by selecting on length (in bits)
        switch (rxlen) {
-      // No answer, try to resurrect
-               case 0: {
-                       // Stop if there is no answer while we are in crypto mode (after sending NrAr)
-                       if (bCrypto) {
-        // Failed during authentication
-        if (bAuthenticating) {
-          DbpString("Authentication failed!");
-          return false;
-        } else {
-          // Failed reading a block, could be (read/write) locked, skip block and re-authenticate
-          if (blocknr == 1) {
-            // Write the low part of the key in memory
-            memcpy(tag.sectors[1],key+2,4);
-          } else if (blocknr == 2) {
-            // Write the high part of the key in memory
-            tag.sectors[2][0] = 0x00;
-            tag.sectors[2][1] = 0x00;
-            tag.sectors[2][2] = key[0];
-            tag.sectors[2][3] = key[1];
-          } else {
-            // Just put zero's in the memory (of the unreadable block)
-            memset(tag.sectors[blocknr],0x00,4);
-          }
-          blocknr++;
-          bCrypto = false;
-        }
+               // No answer, try to resurrect
+       case 0:
+       {
+               // Stop if there is no answer while we are in crypto mode (after sending NrAr)
+               if (bCrypto) {
+                       // Failed during authentication
+                       if (bAuthenticating) {
+                               DbpString("Authentication failed!");
+                               return false;
                        } else {
-        *txlen = 5;
-        memcpy(tx,"\xc0",nbytes(*txlen));
-      }
-               } break;
-                       
-      // Received UID, crypto tag answer
-               case 32: {
-                       if (!bCrypto) {
-        uint64_t ui64key = key[0] | ((uint64_t)key[1]) << 8 | ((uint64_t)key[2]) << 16 | ((uint64_t)key[3]) << 24 | ((uint64_t)key[4]) << 32 | ((uint64_t)key[5]) << 40;
-        uint32_t ui32uid = rx[0] | ((uint32_t)rx[1]) << 8 | ((uint32_t)rx[2]) << 16 | ((uint32_t)rx[3]) << 24;
-        cipher_state = _hitag2_init(rev64(ui64key), rev32(ui32uid), 0);
-        memset(tx,0x00,4);
-        memset(tx+4,0xff,4);
-        hitag2_cipher_transcrypt(&cipher_state,tx+4,4,0);
-                               *txlen = 64;
-                               bCrypto = true;
-        bAuthenticating = true;
+                               // Failed reading a block, could be (read/write) locked, skip block and re-authenticate
+                               if (blocknr == 1) {
+                                       // Write the low part of the key in memory
+                                       memcpy(tag.sectors[1],key+2,4);
+                               } else if (blocknr == 2) {
+                                       // Write the high part of the key in memory
+                                       tag.sectors[2][0] = 0x00;
+                                       tag.sectors[2][1] = 0x00;
+                                       tag.sectors[2][2] = key[0];
+                                       tag.sectors[2][3] = key[1];
+                               } else {
+                                       // Just put zero's in the memory (of the unreadable block)
+                                       memset(tag.sectors[blocknr],0x00,4);
+                               }
+                               blocknr++;
+                               bCrypto = false;
+                       }
+               } else {
+                       *txlen = 5;
+                       memcpy(tx,"\xc0",nbytes(*txlen));
+               }
+       break;
+       }
+       // Received UID, crypto tag answer
+       case 32: {
+               if (!bCrypto) {
+                       uint64_t ui64key = key[0] | ((uint64_t)key[1]) << 8 | ((uint64_t)key[2]) << 16 | ((uint64_t)key[3]) << 24 | ((uint64_t)key[4]) << 32 | ((uint64_t)key[5]) << 40;
+                       uint32_t ui32uid = rx[0] | ((uint32_t)rx[1]) << 8 | ((uint32_t)rx[2]) << 16 | ((uint32_t)rx[3]) << 24;
+                       Dbprintf("hitag2_crypto: key=0x%x%x uid=0x%x", (uint32_t) ((rev64(ui64key)) >> 32), (uint32_t) ((rev64(ui64key)) & 0xffffffff), rev32(ui32uid));
+                       cipher_state = _hitag2_init(rev64(ui64key), rev32(ui32uid), 0);
+                       memset(tx,0x00,4);
+                       memset(tx+4,0xff,4);
+                       hitag2_cipher_transcrypt(&cipher_state, tx+4, 4, 0);
+                       *txlen = 64;
+                       bCrypto = true;
+                       bAuthenticating = true;
+               } else {
+                       // Check if we received answer tag (at)
+                       if (bAuthenticating) {
+                               bAuthenticating = false;
+                               if (write) {
+                                       if (!hitag2_write_page(rx, rxlen, tx, txlen)) {
+                                               return false;
+                                       }
+                                       break;
+                               }
                        } else {
-        // Check if we received answer tag (at)
-        if (bAuthenticating) {
-          bAuthenticating = false;
-        } else {
-          // Store the received block
-          memcpy(tag.sectors[blocknr],rx,4);
-          blocknr++;
-        }
-        if (blocknr > 7) {
-          DbpString("Read succesful!");
-          bSuccessful = true;
-          return false;
-        }
-        *txlen = 10;
-        tx[0] = 0xc0 | (blocknr << 3) | ((blocknr^7) >> 2);
-        tx[1] = ((blocknr^7) << 6);
+                               // Store the received block
+                               memcpy(tag.sectors[blocknr],rx,4);
+                               blocknr++;
                        }
-               } break;
+
+                       if (blocknr > 7) {
+                               DbpString("Read succesful!");
+                               bSuccessful = true;
+                               return false;
+                       } else {
+                               *txlen = 10;
+                               tx[0] = 0xc0 | (blocknr << 3) | ((blocknr^7) >> 2);
+                               tx[1] = ((blocknr^7) << 6);
+                       }
+               }
+       } break;
                        
-      // Unexpected response
-               default: {
-                       Dbprintf("Uknown frame length: %d",rxlen);
-                       return false;
-               } break;
+               // Unexpected response
+       default: {
+               Dbprintf("Uknown frame length: %d",rxlen);
+               return false;
+       } break;
+       }
        }
-       
   
-  if(bCrypto) {
-    // We have to return now to avoid double encryption
-    if (!bAuthenticating) {
-      hitag2_cipher_transcrypt(&cipher_state,tx,*txlen/8,*txlen%8);
-    }
+       if(bCrypto) {
+               // We have to return now to avoid double encryption
+               if (!bAuthenticating) {
+                       hitag2_cipher_transcrypt(&cipher_state,tx,*txlen/8,*txlen%8);
+               }
        }
 
        return true;
@@ -607,34 +677,34 @@ static bool hitag2_authenticate(byte_t* rx, const size_t rxlen, byte_t* tx, size
        // Try to find out which command was send by selecting on length (in bits)
        switch (rxlen) {
                // No answer, try to resurrect
-               case 0: {
-                       // Stop if there is no answer while we are in crypto mode (after sending NrAr)
-                       if (bCrypto) {
-                               DbpString("Authentication failed!");
-                               return false;
-                       }
-                       *txlen = 5;
-                       memcpy(tx,"\xc0",nbytes(*txlen));
-               } break;
+       case 0: {
+               // Stop if there is no answer while we are in crypto mode (after sending NrAr)
+               if (bCrypto) {
+                       DbpString("Authentication failed!");
+                       return false;
+               }
+               *txlen = 5;
+               memcpy(tx,"\xc0",nbytes(*txlen));
+       } break;
                        
                // Received UID, crypto tag answer
-               case 32: {
-                       if (!bCrypto) {
-                               *txlen = 64;
-                               memcpy(tx,NrAr,8);
-                               bCrypto = true;
-                       } else {
-                               DbpString("Authentication succesful!");
-                               // We are done... for now
-                               return false;
-                       }
-               } break;
+       case 32: {
+               if (!bCrypto) {
+                       *txlen = 64;
+                       memcpy(tx,NrAr,8);
+                       bCrypto = true;
+               } else {
+                       DbpString("Authentication succesful!");
+                       // We are done... for now
+                       return false;
+               }
+       } break;
                        
                // Unexpected response
-               default: {
-                       Dbprintf("Uknown frame length: %d",rxlen);
-                       return false;
-               } break;
+       default: {
+               Dbprintf("Uknown frame length: %d",rxlen);
+               return false;
+       } break;
        }
        
        return true;
@@ -648,50 +718,50 @@ static bool hitag2_test_auth_attempts(byte_t* rx, const size_t rxlen, byte_t* tx
        
        // Try to find out which command was send by selecting on length (in bits)
        switch (rxlen) {
-                       // No answer, try to resurrect
-               case 0: {
-                       // Stop if there is no answer while we are in crypto mode (after sending NrAr)
-                       if (bCrypto) {
-                               Dbprintf("auth: %02x%02x%02x%02x%02x%02x%02x%02x Failed, removed entry!",NrAr[0],NrAr[1],NrAr[2],NrAr[3],NrAr[4],NrAr[5],NrAr[6],NrAr[7]);
-
-                               // Removing failed entry from authentiations table
-                               memcpy(auth_table+auth_table_pos,auth_table+auth_table_pos+8,8);
-                               auth_table_len -= 8;
+               // No answer, try to resurrect
+       case 0: {
+               // Stop if there is no answer while we are in crypto mode (after sending NrAr)
+               if (bCrypto) {
+                       Dbprintf("auth: %02x%02x%02x%02x%02x%02x%02x%02x Failed, removed entry!",NrAr[0],NrAr[1],NrAr[2],NrAr[3],NrAr[4],NrAr[5],NrAr[6],NrAr[7]);
 
-                               // Return if we reached the end of the authentications table
-                               bCrypto = false;
-                               if (auth_table_pos == auth_table_len) {
-                                       return false;
-                               }
+                       // Removing failed entry from authentiations table
+                       memcpy(auth_table+auth_table_pos,auth_table+auth_table_pos+8,8);
+                       auth_table_len -= 8;
 
-                               // Copy the next authentication attempt in row (at the same position, b/c we removed last failed entry)
-                               memcpy(NrAr,auth_table+auth_table_pos,8);
+                       // Return if we reached the end of the authentications table
+                       bCrypto = false;
+                       if (auth_table_pos == auth_table_len) {
+                               return false;
                        }
-                       *txlen = 5;
-                       memcpy(tx,"\xc0",nbytes(*txlen));
-               }       break;
+
+                       // Copy the next authentication attempt in row (at the same position, b/c we removed last failed entry)
+                       memcpy(NrAr,auth_table+auth_table_pos,8);
+               }
+               *txlen = 5;
+               memcpy(tx,"\xc0",nbytes(*txlen));
+       }       break;
                        
-                       // Received UID, crypto tag answer, or read block response
-               case 32: {
-                       if (!bCrypto) {
-                               *txlen = 64;
-                               memcpy(tx,NrAr,8);
-                               bCrypto = true;
-                       } else {
-                               Dbprintf("auth: %02x%02x%02x%02x%02x%02x%02x%02x OK",NrAr[0],NrAr[1],NrAr[2],NrAr[3],NrAr[4],NrAr[5],NrAr[6],NrAr[7]);
-                               bCrypto = false;
-                               if ((auth_table_pos+8) == auth_table_len) {
-                                       return false;
-                               }
-                               auth_table_pos += 8;
-                               memcpy(NrAr,auth_table+auth_table_pos,8);
+               // Received UID, crypto tag answer, or read block response
+       case 32: {
+               if (!bCrypto) {
+                       *txlen = 64;
+                       memcpy(tx,NrAr,8);
+                       bCrypto = true;
+               } else {
+                       Dbprintf("auth: %02x%02x%02x%02x%02x%02x%02x%02x OK",NrAr[0],NrAr[1],NrAr[2],NrAr[3],NrAr[4],NrAr[5],NrAr[6],NrAr[7]);
+                       bCrypto = false;
+                       if ((auth_table_pos+8) == auth_table_len) {
+                               return false;
                        }
-               } break;
+                       auth_table_pos += 8;
+                       memcpy(NrAr,auth_table+auth_table_pos,8);
+               }
+       } break;
                        
-               default: {
-                       Dbprintf("Uknown frame length: %d",rxlen);
-                       return false;
-               } break;
+       default: {
+               Dbprintf("Uknown frame length: %d",rxlen);
+               return false;
+       } break;
        }
        
        return true;
@@ -704,32 +774,32 @@ static bool hitag2_read_uid(byte_t* rx, const size_t rxlen, byte_t* tx, size_t*
        // Try to find out which command was send by selecting on length (in bits)
        switch (rxlen) {
                // No answer, try to resurrect
-               case 0: {
-                       // Just starting or if there is no answer
-                       *txlen = 5;
-                       memcpy(tx,"\xc0",nbytes(*txlen));
-               } break;
+       case 0: {
+               // Just starting or if there is no answer
+               *txlen = 5;
+               memcpy(tx,"\xc0",nbytes(*txlen));
+       } break;
                // Received UID
-               case 32: {
-                       // Check if we received answer tag (at)
-                       if (bAuthenticating) {
-                               bAuthenticating = false;
-                       } else {
-                               // Store the received block
-                               memcpy(tag.sectors[blocknr],rx,4);
-                               blocknr++;
-                       }
-                       if (blocknr > 0) {
-                               //DbpString("Read successful!");
-                               bSuccessful = true;
-                               return false;
-                       }
-               } break;
-               // Unexpected response
-               default: {
-                       Dbprintf("Uknown frame length: %d",rxlen);
+       case 32: {
+               // Check if we received answer tag (at)
+               if (bAuthenticating) {
+                       bAuthenticating = false;
+               } else {
+                       // Store the received block
+                       memcpy(tag.sectors[blocknr],rx,4);
+                       blocknr++;
+               }
+               if (blocknr > 0) {
+                       //DbpString("Read successful!");
+                       bSuccessful = true;
                        return false;
-               } break;
+               }
+       } break;
+               // Unexpected response
+       default: {
+               Dbprintf("Uknown frame length: %d",rxlen);
+               return false;
+       } break;
        }
        return true;
 }
@@ -756,7 +826,7 @@ void SnoopHitag(uint32_t type) {
        auth_table_pos = 0;
 
        BigBuf_free();
-    auth_table = (byte_t *)BigBuf_malloc(AUTH_TABLE_LENGTH);
+       auth_table = (byte_t *)BigBuf_malloc(AUTH_TABLE_LENGTH);
        memset(auth_table, 0x00, AUTH_TABLE_LENGTH);
 
        DbpString("Starting Hitag2 snoop");
@@ -792,7 +862,6 @@ void SnoopHitag(uint32_t type) {
        AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
        
        // Reset the received frame, frame count and timing info
-       memset(rx,0x00,sizeof(rx));
        frame_count = 0;
        response = 0;
        overflow = 0;
@@ -826,7 +895,7 @@ void SnoopHitag(uint32_t type) {
                                
                                // Only handle if reader frame and rising edge, or tag frame and falling edge
                                if (reader_frame != rising_edge) {
-                                 overflow += ra;
+                                       overflow += ra;
                                        continue;
                                }
                                
@@ -935,14 +1004,14 @@ void SnoopHitag(uint32_t type) {
                // Reset the timer to restart while-loop that receives frames
                AT91C_BASE_TC1->TC_CCR = AT91C_TC_SWTRG;
        }
-    LED_A_ON();
+       LED_A_ON();
        LED_B_OFF();
        LED_C_OFF();
        LED_D_OFF();
        AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS;
-    AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS;
+       AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS;
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-    LED_A_OFF();
+       LED_A_OFF();
        
 //     Dbprintf("frame received: %d",frame_count);
 //     Dbprintf("Authentication Attempts: %d",(auth_table_len/8));
@@ -968,9 +1037,9 @@ void SimulateHitagTag(bool tag_mem_supplied, byte_t* data) {
 
        auth_table_len = 0;
        auth_table_pos = 0;
-    byte_t* auth_table;
+       byte_t* auth_table;
        BigBuf_free();
-    auth_table = (byte_t *)BigBuf_malloc(AUTH_TABLE_LENGTH);
+       auth_table = (byte_t *)BigBuf_malloc(AUTH_TABLE_LENGTH);
        memset(auth_table, 0x00, AUTH_TABLE_LENGTH);
 
        DbpString("Starting Hitag2 simulation");
@@ -1012,7 +1081,7 @@ void SimulateHitagTag(bool tag_mem_supplied, byte_t* data) {
        AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_TC1);
        AT91C_BASE_PIOA->PIO_BSR = GPIO_SSC_FRAME;
        
-  // Disable timer during configuration        
+       // Disable timer during configuration   
        AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS;
 
        // Capture mode, default timer source = MCK/2 (TIMER_CLOCK1), TIOA is external trigger,
@@ -1163,52 +1232,343 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
 
        // Check configuration
        switch(htf) {
+       case RHT2F_PASSWORD: {
+               Dbprintf("List identifier in password mode");
+               memcpy(password,htd->pwd.password,4);
+               blocknr = 0;
+               bQuitTraceFull = false;
+               bQuiet = false;
+               bPwd = false;
+       } break;
+       case RHT2F_AUTHENTICATE: {
+               DbpString("Authenticating using nr,ar pair:");
+               memcpy(NrAr,htd->auth.NrAr,8);
+               Dbhexdump(8,NrAr,false);
+               bQuiet = false;
+               bCrypto = false;
+               bAuthenticating = false;
+               bQuitTraceFull = true;
+       } break;
+       case RHT2F_CRYPTO: 
+       {
+               DbpString("Authenticating using key:");
+               memcpy(key,htd->crypto.key,6);    //HACK; 4 or 6??  I read both in the code.
+               Dbhexdump(6,key,false);
+               blocknr = 0;
+               bQuiet = false;
+               bCrypto = false;
+               bAuthenticating = false;
+               bQuitTraceFull = true;
+       } break;
+       case RHT2F_TEST_AUTH_ATTEMPTS: {
+               Dbprintf("Testing %d authentication attempts",(auth_table_len/8));
+               auth_table_pos = 0;
+               memcpy(NrAr, auth_table, 8);
+               bQuitTraceFull = false;
+               bQuiet = false;
+               bCrypto = false;
+       } break;
+       case RHT2F_UID_ONLY: {
+               blocknr = 0;
+               bQuiet = false;
+               bCrypto = false;
+               bAuthenticating = false;
+               bQuitTraceFull = true;
+       } break;
+       default: {
+               Dbprintf("Error, unknown function: %d",htf);
+               return;
+       } break;
+       }
+       
+       LED_D_ON();
+       hitag2_init();
+       
+       // Configure output and enable pin that is connected to the FPGA (for modulating)
+       AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
+       AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT;
+       
+       // Set fpga in edge detect with reader field, we can modulate as reader now
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT | FPGA_LF_EDGE_DETECT_READER_FIELD);
+
+       // Set Frequency divisor which will drive the FPGA and analog mux selection
+       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
+       SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
+       RELAY_OFF();
+
+       // Disable modulation at default, which means enable the field
+       LOW(GPIO_SSC_DOUT);
+
+       // Give it a bit of time for the resonant antenna to settle.
+       SpinDelay(30);
+       
+       // Enable Peripheral Clock for TIMER_CLOCK0, used to measure exact timing before answering
+       AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_TC0);
+
+       // Enable Peripheral Clock for TIMER_CLOCK1, used to capture edges of the tag frames
+       AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_TC1);
+       AT91C_BASE_PIOA->PIO_BSR = GPIO_SSC_FRAME;
+       
+       // Disable timer during configuration   
+       AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS;
+       
+       // Capture mode, defaul timer source = MCK/2 (TIMER_CLOCK1), TIOA is external trigger,
+       // external trigger rising edge, load RA on falling edge of TIOA.
+       AT91C_BASE_TC1->TC_CMR = AT91C_TC_CLKS_TIMER_DIV1_CLOCK | AT91C_TC_ETRGEDG_FALLING | AT91C_TC_ABETRG | AT91C_TC_LDRA_FALLING;
+       
+       // Enable and reset counters
+       AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
+       AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
+
+       // Reset the received frame, frame count and timing info
+       frame_count = 0;
+       response = 0;
+       lastbit = 1;
+       bStop = false;
+
+       // Tag specific configuration settings (sof, timings, etc.)
+       if (htf < 10){
+               // hitagS settings
+               reset_sof = 1;
+               t_wait = 200;
+               //DbpString("Configured for hitagS reader");
+       } else if (htf < 20) {
+               // hitag1 settings
+               reset_sof = 1;
+               t_wait = 200;
+               //DbpString("Configured for hitag1 reader");
+       } else if (htf < 30) {
+               // hitag2 settings
+               reset_sof = 4;
+               t_wait = HITAG_T_WAIT_2;
+               //DbpString("Configured for hitag2 reader");
+       } else {
+               Dbprintf("Error, unknown hitag reader type: %d",htf);
+               return;
+       }
+       uint8_t attempt_count=0;
+       while(!bStop && !BUTTON_PRESS()) {
+               // Watchdog hit
+               WDT_HIT();
+               
+               // Check if frame was captured and store it
+               if(rxlen > 0) {
+                       frame_count++;
+                       if (!bQuiet) {
+                               if (!LogTraceHitag(rx,rxlen,response,0,false)) {
+                                       DbpString("Trace full");
+                                       if (bQuitTraceFull) {
+                                               break;
+                                       } else {
+                                               bQuiet = true;
+                                       }
+                               }
+                       }
+               }
+               
+               // By default reset the transmission buffer
+               tx = txbuf;
+               switch(htf) {
                case RHT2F_PASSWORD: {
-                       Dbprintf("List identifier in password mode");
-                       memcpy(password,htd->pwd.password,4);
-                       blocknr = 0;
-                       bQuitTraceFull = false;
-                       bQuiet = false;
-                       bPwd = false;
+                       bStop = !hitag2_password(rx,rxlen,tx,&txlen);
                } break;
                case RHT2F_AUTHENTICATE: {
-                       DbpString("Authenticating using nr,ar pair:");
-                       memcpy(NrAr,htd->auth.NrAr,8);
-                       Dbhexdump(8,NrAr,false);
-                       bQuiet = false;
-                       bCrypto = false;
-                       bAuthenticating = false;
-                       bQuitTraceFull = true;
+                       bStop = !hitag2_authenticate(rx,rxlen,tx,&txlen);
                } break;
                case RHT2F_CRYPTO: {
-                       DbpString("Authenticating using key:");
-                       memcpy(key,htd->crypto.key,6);    //HACK; 4 or 6??  I read both in the code.
-                       Dbhexdump(6,key,false);
-                       blocknr = 0;
-                       bQuiet = false;
-                       bCrypto = false;
-                       bAuthenticating = false;
-                       bQuitTraceFull = true;
+                       bStop = !hitag2_crypto(rx,rxlen,tx,&txlen, false);
                } break;
                case RHT2F_TEST_AUTH_ATTEMPTS: {
-                       Dbprintf("Testing %d authentication attempts",(auth_table_len/8));
-                       auth_table_pos = 0;
-                       memcpy(NrAr, auth_table, 8);
-                       bQuitTraceFull = false;
-                       bQuiet = false;
-                       bCrypto = false;
+                       bStop = !hitag2_test_auth_attempts(rx,rxlen,tx,&txlen);
                } break;
                case RHT2F_UID_ONLY: {
-                       blocknr = 0;
-                       bQuiet = false;
-                       bCrypto = false;
-                       bAuthenticating = false;
-                       bQuitTraceFull = true;
+                       bStop = !hitag2_read_uid(rx, rxlen, tx, &txlen);
+                       attempt_count++; //attempt 3 times to get uid then quit
+                       if (!bStop && attempt_count == 3) bStop = true;
                } break;
                default: {
                        Dbprintf("Error, unknown function: %d",htf);
                        return;
                } break;
+               }
+               
+               // Send and store the reader command
+               // Disable timer 1 with external trigger to avoid triggers during our own modulation
+               AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS;
+                       
+               // Wait for HITAG_T_WAIT_2 carrier periods after the last tag bit before transmitting,
+               // Since the clock counts since the last falling edge, a 'one' means that the
+               // falling edge occured halfway the period. with respect to this falling edge,
+               // we need to wait (T_Wait2 + half_tag_period) when the last was a 'one'.
+               // All timer values are in terms of T0 units
+               while(AT91C_BASE_TC0->TC_CV < T0*(t_wait+(HITAG_T_TAG_HALF_PERIOD*lastbit)));
+                       
+               //Dbprintf("DEBUG: Sending reader frame");
+               
+               // Transmit the reader frame
+               hitag_reader_send_frame(tx,txlen);
+
+                // Enable and reset external trigger in timer for capturing future frames
+               AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
+
+               // Add transmitted frame to total count
+               if(txlen > 0) {
+                       frame_count++;
+                       if (!bQuiet) {
+                               // Store the frame in the trace
+                               if (!LogTraceHitag(tx,txlen,HITAG_T_WAIT_2,0,true)) {
+                                       if (bQuitTraceFull) {
+                                               break;
+                                       } else {
+                                               bQuiet = true;
+                                       }
+                               }
+                       }
+               }
+
+               // Reset values for receiving frames
+               memset(rx,0x00,sizeof(rx));
+               rxlen = 0;
+               lastbit = 1;
+               bSkip = true;
+               tag_sof = reset_sof;
+               response = 0;
+               //Dbprintf("DEBUG: Waiting to receive frame");
+               uint32_t errorCount = 0;
+
+               // Receive frame, watch for at most T0*EOF periods
+               while (AT91C_BASE_TC1->TC_CV < T0*HITAG_T_WAIT_MAX) {
+                       // Check if falling edge in tag modulation is detected
+                       if(AT91C_BASE_TC1->TC_SR & AT91C_TC_LDRAS) {
+                               // Retrieve the new timing values 
+                               int ra = (AT91C_BASE_TC1->TC_RA/T0);
+                               
+                               // Reset timer every frame, we have to capture the last edge for timing
+                               AT91C_BASE_TC0->TC_CCR = AT91C_TC_SWTRG;
+                               
+                               LED_B_ON();
+                                
+                               // Capture tag frame (manchester decoding using only falling edges)
+                               if(ra >= HITAG_T_EOF) {
+                                       if (rxlen != 0) {
+                                               //Dbprintf("DEBUG: Wierd1");
+                                       }
+                                       // Capture the T0 periods that have passed since last communication or field drop (reset)
+                                       // We always recieve a 'one' first, which has the falling edge after a half period |-_|
+                                       response = ra-HITAG_T_TAG_HALF_PERIOD;
+                               } else if(ra >= HITAG_T_TAG_CAPTURE_FOUR_HALF) {
+                                       // Manchester coding example |-_|_-|-_| (101)
+
+                                       //need to test to verify we don't exceed memory...
+                                       //if ( ((rxlen+2) / 8) > HITAG_FRAME_LEN) {
+                                       //      break;
+                                       //}
+                                       rx[rxlen / 8] |= 0 << (7-(rxlen%8));
+                                       rxlen++;
+                                       rx[rxlen / 8] |= 1 << (7-(rxlen%8));
+                                       rxlen++;
+                               } else if(ra >= HITAG_T_TAG_CAPTURE_THREE_HALF) {
+                                       // Manchester coding example |_-|...|_-|-_| (0...01)
+                                       
+                                       //need to test to verify we don't exceed memory...
+                                       //if ( ((rxlen+2) / 8) > HITAG_FRAME_LEN) {
+                                       //      break;
+                                       //}
+                                       rx[rxlen / 8] |= 0 << (7-(rxlen%8));
+                                       rxlen++;
+                                       // We have to skip this half period at start and add the 'one' the second time 
+                                       if (!bSkip) {
+                                               rx[rxlen / 8] |= 1 << (7-(rxlen%8));
+                                               rxlen++;
+                                       }
+                                       lastbit = !lastbit;
+                                       bSkip = !bSkip;
+                               } else if(ra >= HITAG_T_TAG_CAPTURE_TWO_HALF) {
+                                       // Manchester coding example |_-|_-| (00) or |-_|-_| (11)
+
+                                       //need to test to verify we don't exceed memory...
+                                       //if ( ((rxlen+2) / 8) > HITAG_FRAME_LEN) {
+                                       //      break;
+                                       //}
+                                       if (tag_sof) {
+                                               // Ignore bits that are transmitted during SOF
+                                               tag_sof--;
+                                       } else {
+                                               // bit is same as last bit
+                                               rx[rxlen / 8] |= lastbit << (7-(rxlen%8));
+                                               rxlen++;
+                                       }
+                               } else {
+                                       //Dbprintf("DEBUG: Wierd2");
+                                       errorCount++;
+                                       // Ignore wierd value, is to small to mean anything
+                               }
+                       }
+                       //if we saw over 100 wierd values break it probably isn't hitag...
+                       if (errorCount >100) break;
+                       // We can break this loop if we received the last bit from a frame
+                       if (AT91C_BASE_TC1->TC_CV > T0*HITAG_T_EOF) {
+                               if (rxlen>0) break;
+                       }
+               }
+       }
+       //Dbprintf("DEBUG: Done waiting for frame");
+       
+       LED_B_OFF();
+       LED_D_OFF();
+       AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS;
+       AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS;
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       //Dbprintf("frame received: %d",frame_count);
+       //DbpString("All done");
+       cmd_send(CMD_ACK,bSuccessful,0,0,(byte_t*)tag.sectors,48);
+}
+
+void WriterHitag(hitag_function htf, hitag_data* htd, int page) {
+       int frame_count;
+       int response;
+       byte_t rx[HITAG_FRAME_LEN];
+       size_t rxlen=0;
+       byte_t txbuf[HITAG_FRAME_LEN];
+       byte_t* tx = txbuf;
+       size_t txlen=0;
+       int lastbit;
+       bool bSkip;
+       int reset_sof; 
+       int tag_sof;
+       int t_wait = HITAG_T_WAIT_MAX;
+       bool bStop;
+       bool bQuitTraceFull = false;
+  
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+       // Reset the return status
+       bSuccessful = false;
+  
+       // Clean up trace and prepare it for storing frames
+       set_tracing(TRUE);
+       clear_trace();
+
+       //DbpString("Starting Hitag reader family");
+
+       // Check configuration
+       switch(htf) {
+       case WHT2F_CRYPTO:
+       {
+               DbpString("Authenticating using key:");
+               memcpy(key,htd->crypto.key,6);    //HACK; 4 or 6??  I read both in the code.
+               memcpy(writedata, htd->crypto.data, 4);
+               Dbhexdump(6,key,false);
+               blocknr = page;
+               bQuiet = false;
+               bCrypto = false;
+               bAuthenticating = false;
+               bQuitTraceFull = true;
+               writestate = WRITE_STATE_START;
+       } break;
+       default: {
+               Dbprintf("Error, unknown function: %d",htf);
+               return;
+       } break;
        }
        
        LED_D_ON();
@@ -1239,7 +1599,7 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
        AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_TC1);
        AT91C_BASE_PIOA->PIO_BSR = GPIO_SSC_FRAME;
        
-    // Disable timer during configuration      
+       // Disable timer during configuration   
        AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS;
        
        // Capture mode, defaul timer source = MCK/2 (TIMER_CLOCK1), TIOA is external trigger,
@@ -1256,27 +1616,26 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
        lastbit = 1;
        bStop = false;
 
-  // Tag specific configuration settings (sof, timings, etc.)
-  if (htf < 10){
-    // hitagS settings
-    reset_sof = 1;
-    t_wait = 200;
-    //DbpString("Configured for hitagS reader");
-  } else if (htf < 20) {
-    // hitag1 settings
-    reset_sof = 1;
-    t_wait = 200;
-    //DbpString("Configured for hitag1 reader");
-  } else if (htf < 30) {
-    // hitag2 settings
-    reset_sof = 4;
-    t_wait = HITAG_T_WAIT_2;
-    //DbpString("Configured for hitag2 reader");
+       // Tag specific configuration settings (sof, timings, etc.)
+       if (htf < 10){
+               // hitagS settings
+               reset_sof = 1;
+               t_wait = 200;
+               //DbpString("Configured for hitagS reader");
+       } else if (htf < 20) {
+               // hitag1 settings
+               reset_sof = 1;
+               t_wait = 200;
+               //DbpString("Configured for hitag1 reader");
+       } else if (htf < 30) {
+               // hitag2 settings
+               reset_sof = 4;
+               t_wait = HITAG_T_WAIT_2;
+               //DbpString("Configured for hitag2 reader");
        } else {
-    Dbprintf("Error, unknown hitag reader type: %d",htf);
-    return;
-  }
-       uint8_t attempt_count=0;
+               Dbprintf("Error, unknown hitag reader type: %d",htf);
+               return;
+       }
        while(!bStop && !BUTTON_PRESS()) {
                // Watchdog hit
                WDT_HIT();
@@ -1299,27 +1658,13 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
                // By default reset the transmission buffer
                tx = txbuf;
                switch(htf) {
-                       case RHT2F_PASSWORD: {
-                               bStop = !hitag2_password(rx,rxlen,tx,&txlen);
-                       } break;
-                       case RHT2F_AUTHENTICATE: {
-                               bStop = !hitag2_authenticate(rx,rxlen,tx,&txlen);
-                       } break;
-                       case RHT2F_CRYPTO: {
-                               bStop = !hitag2_crypto(rx,rxlen,tx,&txlen);
-                       } break;
-                       case RHT2F_TEST_AUTH_ATTEMPTS: {
-                               bStop = !hitag2_test_auth_attempts(rx,rxlen,tx,&txlen);
-                       } break;
-                       case RHT2F_UID_ONLY: {
-                               bStop = !hitag2_read_uid(rx, rxlen, tx, &txlen);
-                               attempt_count++; //attempt 3 times to get uid then quit
-                               if (!bStop && attempt_count == 3) bStop = true;
-                       } break;
-                       default: {
-                               Dbprintf("Error, unknown function: %d",htf);
-                               return;
-                       } break;
+               case WHT2F_CRYPTO: {
+                       bStop = !hitag2_crypto(rx,rxlen,tx,&txlen, true);
+               } break;
+               default: {
+                       Dbprintf("Error, unknown function: %d",htf);
+                       return;
+               } break;
                }
                
                // Send and store the reader command
@@ -1333,12 +1678,12 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
                // All timer values are in terms of T0 units
                while(AT91C_BASE_TC0->TC_CV < T0*(t_wait+(HITAG_T_TAG_HALF_PERIOD*lastbit)));
                        
-                       //Dbprintf("DEBUG: Sending reader frame");
+               //Dbprintf("DEBUG: Sending reader frame");
                
                // Transmit the reader frame
                hitag_reader_send_frame(tx,txlen);
 
-               // Enable and reset external trigger in timer for capturing future frames
+                // Enable and reset external trigger in timer for capturing future frames
                AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
 
                // Add transmitted frame to total count
@@ -1355,7 +1700,7 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
                                }
                        }
                }
-                               
+
                // Reset values for receiving frames
                memset(rx,0x00,sizeof(rx));
                rxlen = 0;
@@ -1363,7 +1708,7 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
                bSkip = true;
                tag_sof = reset_sof;
                response = 0;
-                       //Dbprintf("DEBUG: Waiting to receive frame");
+               //Dbprintf("DEBUG: Waiting to receive frame");
                uint32_t errorCount = 0;
 
                // Receive frame, watch for at most T0*EOF periods
@@ -1377,7 +1722,7 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
                                AT91C_BASE_TC0->TC_CCR = AT91C_TC_SWTRG;
                                
                                LED_B_ON();
-                               
+                                
                                // Capture tag frame (manchester decoding using only falling edges)
                                if(ra >= HITAG_T_EOF) {
                                        if (rxlen != 0) {
@@ -1429,8 +1774,8 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
                                                rxlen++;
                                        }
                                } else {
-                                               //Dbprintf("DEBUG: Wierd2");
-                                               errorCount++;
+                                       //Dbprintf("DEBUG: Wierd2");
+                                       errorCount++;
                                        // Ignore wierd value, is to small to mean anything
                                }
                        }
@@ -1441,6 +1786,13 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
                                if (rxlen>0) break;
                        }
                }
+               
+               // Wait some extra time for flash to be programmed
+               if ((rxlen == 0) && (writestate == WRITE_STATE_PROG))
+               {
+                       AT91C_BASE_TC0->TC_CCR = AT91C_TC_SWTRG;
+                       while(AT91C_BASE_TC0->TC_CV < T0*(HITAG_T_PROG - HITAG_T_WAIT_MAX));
+               }
        }
        //Dbprintf("DEBUG: Done waiting for frame");
        
index 718cb703dc34df92563294104f06f3ad797a5342..103f2b778babba3896a2cec3a28dc8d1cab61aa7 100644 (file)
@@ -349,7 +349,9 @@ int CmdLFHitagWP(const char *Cmd) {
                        c.arg[2]= param_get32ex(Cmd, 2, 0, 10);
                        num_to_bytes(param_get32ex(Cmd,3,0,16),4,htd->auth.data);
                } break;
-               case 04: { //WHTSF_KEY
+               case 04:
+               case 24:
+               { //WHTSF_KEY
                        num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
                        c.arg[2]= param_get32ex(Cmd, 2, 0, 10);
                        num_to_bytes(param_get32ex(Cmd,3,0,16),4,htd->crypto.data);
@@ -363,6 +365,7 @@ int CmdLFHitagWP(const char *Cmd) {
                        PrintAndLog("  04 <key> (set to 0 if no authentication is needed) <page> <byte0...byte3> write page on a Hitag S tag");
                        PrintAndLog(" Hitag1 (1*)");
                        PrintAndLog(" Hitag2 (2*)");
+                       PrintAndLog("  24 <key> (set to 0 if no authentication is needed) <page> <byte0...byte3> write page on a Hitag S tag");
                        return 1;
                } break;
        }
index 66770d98c5ee0610b4f796a323d19d90961a4481..2406c6497a1673c5e32a7e906cedcc9768985c59 100644 (file)
@@ -27,8 +27,9 @@ typedef enum {
        RHT2F_PASSWORD            = 21,
        RHT2F_AUTHENTICATE        = 22,
        RHT2F_CRYPTO              = 23,
+       WHT2F_CRYPTO              = 24,
        RHT2F_TEST_AUTH_ATTEMPTS  = 25,
-       RHT2F_UID_ONLY            = 26
+       RHT2F_UID_ONLY            = 26,
 } hitag_function;
 
 typedef struct {
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