/*

 * muscle.c: Support for MuscleCard Applet from musclecard.com

 *

 * Copyright (C) 2006, Identity Alliance, Thomas Harning <support@identityalliance.com>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <string.h>

#include "internal.h"

#include "muscle.h"

#define MSC_RSA_PUBLIC    0x01

#define MSC_RSA_PRIVATE   0x02

#define MSC_RSA_PRIVATE_CRT 0x03

static msc_id inputId = { { 0xFF, 0xFF, 0xFF, 0xFF } };

static msc_id outputId = { { 0xFF, 0xFF, 0xFF, 0xFE } };

int msc_list_objects(sc_card_t* card, u8 next, mscfs_file_t* file) {

  sc_apdu_t apdu;

  u8 fileData[14];

  int r;

  sc_format_apdu(card, &apdu, SC_APDU_CASE_2, 0x58, next, 0x00);

  apdu.le = 14;

  apdu.resplen = 14;

  apdu.resp = fileData;

  r = sc_transmit_apdu(card, &apdu);

  if (r)

    return r;

  if(apdu.sw1 == 0x9C && apdu.sw2 == 0x12) {

    return 0;

  }

  r = sc_check_sw(card, apdu.sw1, apdu.sw2);

  if (r)

    return r;

  if(apdu.resplen == 0) /* No more left */

    return 0;

  if (apdu.resplen != 14) {

    sc_log(card->ctx,

       "expected 14 bytes, got %"SC_FORMAT_LEN_SIZE_T"u.\n",

       apdu.resplen);

    return SC_ERROR_UNKNOWN_DATA_RECEIVED;

  }

  memcpy(file->objectId.id, fileData, 4);

  file->size = bebytes2ulong(fileData + 4);

  file->read = bebytes2ushort(fileData + 8);

  file->write = bebytes2ushort(fileData + 10);

  file->delete = bebytes2ushort(fileData + 12);

  return 1;

}

int msc_partial_read_object(sc_card_t *card, msc_id objectId, int offset, u8 *data, size_t dataLength)

{

  u8 buffer[9];

  sc_apdu_t apdu;

  int r;

  sc_format_apdu(card, &apdu, SC_APDU_CASE_4_SHORT, 0x56, 0x00, 0x00);

  sc_log(card->ctx,

    "READ: Offset: %x\tLength: %"SC_FORMAT_LEN_SIZE_T"u\n", offset,

     dataLength);

  memcpy(buffer, objectId.id, 4);

  ulong2bebytes(buffer + 4, offset);

  buffer[8] = (u8)dataLength;

  apdu.data = buffer;

  apdu.datalen = 9;

  apdu.lc = 9;

  apdu.le = dataLength;

  apdu.resplen = dataLength;

  apdu.resp = data;

  r = sc_transmit_apdu(card, &apdu);

  LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

  if (apdu.sw1 == 0x90 && apdu.sw2 == 0x00 && dataLength <= apdu.resplen)

    return (int)dataLength;

  if (apdu.sw1 == 0x9C) {

    if (apdu.sw2 == 0x07) {

      SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, SC_ERROR_FILE_NOT_FOUND);

    } else if (apdu.sw2 == 0x06) {

      SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, SC_ERROR_NOT_ALLOWED);

    } else if (apdu.sw2 == 0x0F) {

      /* GUESSED */

      SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, SC_ERROR_INVALID_ARGUMENTS);

    }

  }

  sc_log(card->ctx,

    "got strange SWs: 0x%02X 0x%02X\n", apdu.sw1, apdu.sw2);

  SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, SC_ERROR_UNKNOWN_DATA_RECEIVED);

}

int msc_read_object(sc_card_t *card, msc_id objectId, int offset, u8 *data, size_t dataLength)

{

  int r = 0;

  unsigned int i;

  size_t max_read_unit = MSC_MAX_READ;

  for (i = 0; i < dataLength; i += r) {

    r = msc_partial_read_object(card, objectId, offset + i, data + i, MIN(dataLength - i, max_read_unit));

    LOG_TEST_RET(card->ctx, r, "Error in partial object read");

    if (r == 0)

      break;

  }

  return (int)dataLength;

}

int msc_zero_object(sc_card_t *card, msc_id objectId, size_t dataLength)

{

  u8 zeroBuffer[MSC_MAX_APDU];

  size_t i;

  size_t max_write_unit = MIN(MSC_MAX_APDU, MSC_MAX_SEND - 9); /* - 9 for object ID+length */

  memset(zeroBuffer, 0, max_write_unit);

  for(i = 0; i < dataLength; i += max_write_unit) {

    int r = msc_partial_update_object(card, objectId, i, zeroBuffer, MIN(dataLength - i, max_write_unit));

    LOG_TEST_RET(card->ctx, r, "Error in zeroing file update");

  }

  return 0;

}

int msc_create_object(sc_card_t *card, msc_id objectId, size_t objectSize, unsigned short readAcl, unsigned short writeAcl, unsigned short deleteAcl)

{

  u8 buffer[14];

  sc_apdu_t apdu;

  int r;

  sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0x5A, 0x00, 0x00);

  apdu.lc = 14;

  apdu.data = buffer,

  apdu.datalen = 14;

  memcpy(buffer, objectId.id, 4);

  ulong2bebytes(buffer + 4, objectSize);

  ushort2bebytes(buffer + 8, readAcl);

  ushort2bebytes(buffer + 10, writeAcl);

  ushort2bebytes(buffer + 12, deleteAcl);

  r = sc_transmit_apdu(card, &apdu);

  LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

  if(apdu.sw1 == 0x90 && apdu.sw2 == 0x00)

    return (int)objectSize;

  if(apdu.sw1 == 0x9C) {

    if(apdu.sw2 == 0x01) {

      SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, SC_ERROR_MEMORY_FAILURE);

    } else if(apdu.sw2 == 0x08) {

      SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, SC_ERROR_FILE_ALREADY_EXISTS);

    } else if(apdu.sw2 == 0x06) {

      SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, SC_ERROR_NOT_ALLOWED);

    }

  }

  if (card->ctx->debug >= 2) {

    sc_log(card->ctx,  "got strange SWs: 0x%02X 0x%02X\n",

         apdu.sw1, apdu.sw2);

  }

  msc_zero_object(card, objectId, objectSize);

  return (int)objectSize;

}

/* Update up to MSC_MAX_READ - 9 bytes */

int msc_partial_update_object(sc_card_t *card, msc_id objectId, size_t offset, const u8 *data, size_t dataLength)

{

  u8 buffer[MSC_MAX_APDU];

  sc_apdu_t apdu;

  int r;

  if (dataLength + 9 > MSC_MAX_APDU)

    return SC_ERROR_INVALID_ARGUMENTS;

  sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0x54, 0x00, 0x00);

  apdu.lc = dataLength + 9;

  if (card->ctx->debug >= 2)

    sc_log(card->ctx,

       "WRITE: Offset: %zx\tLength: %"SC_FORMAT_LEN_SIZE_T"u\n",

       offset, dataLength);

  memcpy(buffer, objectId.id, 4);

  ulong2bebytes(buffer + 4, offset);

  buffer[8] = (u8)dataLength;

  memcpy(buffer + 9, data, dataLength);

  apdu.data = buffer;

  apdu.datalen = apdu.lc;

  r = sc_transmit_apdu(card, &apdu);

  LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

  if(apdu.sw1 == 0x90 && apdu.sw2 == 0x00)

    return (int)dataLength;

  if(apdu.sw1 == 0x9C) {

    if(apdu.sw2 == 0x07) {

      SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, SC_ERROR_FILE_NOT_FOUND);

    } else if(apdu.sw2 == 0x06) {

      SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, SC_ERROR_NOT_ALLOWED);

    } else if(apdu.sw2 == 0x0F) {

      /* GUESSED */

      SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, SC_ERROR_INVALID_ARGUMENTS);

    }

  }

  if (card->ctx->debug >= 2) {

    sc_log(card->ctx,  "got strange SWs: 0x%02X 0x%02X\n",

         apdu.sw1, apdu.sw2);

  }

  return (int)dataLength;

}

int msc_update_object(sc_card_t *card, msc_id objectId, int offset, const u8 *data, size_t dataLength)

{

  int r;

  size_t i;

  size_t max_write_unit = MSC_MAX_SEND - 9;

  for(i = 0; i < dataLength; i += max_write_unit) {

    r = msc_partial_update_object(card, objectId, offset + i, data + i, MIN(dataLength - i, max_write_unit));

    LOG_TEST_RET(card->ctx, r, "Error in partial object update");

  }

  return (int)dataLength;

}

int msc_delete_object(sc_card_t *card, msc_id objectId, int zero)

{

  sc_apdu_t apdu;

  int r;

  sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0x52, 0x00, zero ? 0x01 : 0x00);

  apdu.lc = 4;

  apdu.data = objectId.id;

  apdu.datalen = 4;

  r = sc_transmit_apdu(card, &apdu);

  LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

  if(apdu.sw1 == 0x90 && apdu.sw2 == 0x00)

    return 0;

  if(apdu.sw1 == 0x9C) {

    if(apdu.sw2 == 0x07) {

      SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, SC_ERROR_FILE_NOT_FOUND);

    } else if(apdu.sw2 == 0x06) {

      SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, SC_ERROR_NOT_ALLOWED);

    }

  }

  if (card->ctx->debug >= 2) {

    sc_log(card->ctx,  "got strange SWs: 0x%02X 0x%02X\n",

         apdu.sw1, apdu.sw2);

  }

  return 0;

}

int msc_select_applet(sc_card_t *card, u8 *appletId, size_t appletIdLength)

{

  sc_apdu_t apdu;

  int r;

  sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0xA4, 4, 0);

  apdu.lc = appletIdLength;

  apdu.data = appletId;

  apdu.datalen = appletIdLength;

  apdu.resplen = 0;

  apdu.le = 0;

  r = sc_transmit_apdu(card, &apdu);

  LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

  if(apdu.sw1 == 0x90 && apdu.sw2 == 0x00)

    return 1;

  SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE,  SC_ERROR_CARD_CMD_FAILED);

}

/* Truncate the nulls at the end of a PIN, useful in padding is unnecessarily added */

static void truncatePinNulls(const u8* pin, size_t *pinLength) {

  for(; *pinLength > 0; (*pinLength)--) {

    if(pin[*pinLength - 1]) break;

  }

}

int msc_verify_pin(sc_card_t *card, int pinNumber, const u8 *pinValue, int pinLength, int *tries)

{

  sc_apdu_t apdu;

  int r;

  const int bufferLength = MSC_MAX_PIN_LENGTH;

  u8 buffer[MSC_MAX_PIN_LENGTH];

  if (pinLength > MSC_MAX_PIN_LENGTH)

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS);

  r = msc_verify_pin_apdu(card, &apdu, buffer, bufferLength, pinNumber, pinValue, pinLength);

  LOG_TEST_RET(card->ctx, r, "APDU verification failed");

  if(tries)

    *tries = -1;

  r = sc_transmit_apdu(card, &apdu);

  LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

  if(apdu.sw1 == 0x90 && apdu.sw2 == 0x00) {

    return 0;

  } else if(apdu.sw1 == 0x63) { /* Invalid auth */

    if(tries)

      *tries = apdu.sw2 & 0x0F;

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_PIN_CODE_INCORRECT);

  } else if(apdu.sw1 == 0x9C && apdu.sw2 == 0x02) {

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_PIN_CODE_INCORRECT);

  } else if(apdu.sw1 == 0x69 && apdu.sw2 == 0x83) {

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_AUTH_METHOD_BLOCKED);

  }

  SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE,  SC_ERROR_PIN_CODE_INCORRECT);

}

/* USE ISO_VERIFY due to tries return */

int msc_verify_pin_apdu(sc_card_t *card, sc_apdu_t *apdu, u8* buffer, size_t bufferLength, int pinNumber, const u8 *pinValue, size_t pinLength)

{

  if (!buffer || bufferLength < (size_t)pinLength || pinLength > MSC_MAX_PIN_LENGTH)

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS);

  truncatePinNulls(pinValue, &pinLength);

  memcpy(buffer, pinValue, pinLength);

  sc_format_apdu(card, apdu, SC_APDU_CASE_3_SHORT, 0x42, pinNumber, 0);

  apdu->lc = pinLength;

  apdu->data = buffer;

  apdu->datalen = pinLength;

  LOG_FUNC_RETURN(card->ctx, SC_SUCCESS);

}

int msc_unblock_pin(sc_card_t *card, int pinNumber, const u8 *pukValue, int pukLength, int *tries)

{

  sc_apdu_t apdu;

  int r;

  const int bufferLength = MSC_MAX_PIN_LENGTH;

  u8 buffer[MSC_MAX_PIN_LENGTH];

  if (pukLength > MSC_MAX_PIN_LENGTH)

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS);

  r = msc_unblock_pin_apdu(card, &apdu, buffer, bufferLength, pinNumber, pukValue, pukLength);

  LOG_TEST_RET(card->ctx, r, "APDU unblock failed");

  if(tries)

    *tries = -1;

  r = sc_transmit_apdu(card, &apdu);

  LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

  if(apdu.sw1 == 0x90 && apdu.sw2 == 0x00) {

    return 0;

  } else if(apdu.sw1 == 0x63) { /* Invalid auth */

    if(tries)

      *tries = apdu.sw2 & 0x0F;

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_PIN_CODE_INCORRECT);

  } else if(apdu.sw1 == 0x9C && apdu.sw2 == 0x02) {

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_PIN_CODE_INCORRECT);

  } else if(apdu.sw1 == 0x69 && apdu.sw2 == 0x83) {

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_AUTH_METHOD_BLOCKED);

  }

  SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE,  SC_ERROR_PIN_CODE_INCORRECT);

}

int msc_unblock_pin_apdu(sc_card_t *card, sc_apdu_t *apdu, u8* buffer, size_t bufferLength, int pinNumber, const u8 *pukValue, size_t pukLength)

{

  if (!buffer || bufferLength < (size_t)pukLength || pukLength > MSC_MAX_PIN_LENGTH)

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS);

  truncatePinNulls(pukValue, &pukLength);

  memcpy(buffer, pukValue, pukLength);

  sc_format_apdu(card, apdu, SC_APDU_CASE_3_SHORT, 0x46, pinNumber, 0);

  apdu->lc = pukLength;

  apdu->data = buffer;

  apdu->datalen = pukLength;

  LOG_FUNC_RETURN(card->ctx, SC_SUCCESS);

}

int msc_change_pin(sc_card_t *card, int pinNumber, const u8 *pinValue, int pinLength, const u8 *newPin, int newPinLength, int *tries)

{

  sc_apdu_t apdu;

  int r;

  const int bufferLength = (MSC_MAX_PIN_LENGTH + 1) * 2;

  u8 buffer[(MSC_MAX_PIN_LENGTH + 1) * 2];

  r = msc_change_pin_apdu(card, &apdu, buffer, bufferLength, pinNumber, pinValue, pinLength, newPin, newPinLength);

  LOG_TEST_RET(card->ctx, r, "APDU change failed");

  if(tries)

    *tries = -1;

  r = sc_transmit_apdu(card, &apdu);

  LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

  if(apdu.sw1 == 0x90 && apdu.sw2 == 0x00) {

    return 0;

  } else if(apdu.sw1 == 0x63) { /* Invalid auth */

    if(tries)

      *tries = apdu.sw2 & 0x0F;

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_PIN_CODE_INCORRECT);

  } else if(apdu.sw1 == 0x9C && apdu.sw2 == 0x02) {

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_PIN_CODE_INCORRECT);

  } else if(apdu.sw1 == 0x69 && apdu.sw2 == 0x83) {

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_AUTH_METHOD_BLOCKED);

  }

  SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE,  SC_ERROR_PIN_CODE_INCORRECT);

}

/* USE ISO_VERIFY due to tries return */

int msc_change_pin_apdu(sc_card_t *card, sc_apdu_t *apdu, u8* buffer, size_t bufferLength, int pinNumber, const u8 *pinValue, size_t pinLength, const u8 *newPin, size_t newPinLength)

{

  u8 *ptr;

  if (pinLength > MSC_MAX_PIN_LENGTH || newPinLength > MSC_MAX_PIN_LENGTH

    || !buffer || bufferLength < pinLength + newPinLength + 2UL)

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS);

  truncatePinNulls(pinValue, &pinLength);

  truncatePinNulls(newPin, &newPinLength);

  ptr = buffer;

  sc_format_apdu(card, apdu, SC_APDU_CASE_3_SHORT, 0x44, pinNumber, 0);

  *ptr = pinLength;

  ptr++;

  memcpy(ptr, pinValue, pinLength);

  ptr += pinLength;

  *ptr = newPinLength;

  ptr++;

  memcpy(ptr, newPin, newPinLength);

  apdu->lc = pinLength + newPinLength + 2;

  apdu->datalen = apdu->lc;

  apdu->data = buffer;

  LOG_FUNC_RETURN(card->ctx, SC_SUCCESS);

}

int msc_get_challenge(sc_card_t *card, unsigned short dataLength, unsigned short seedLength, u8 *seedData, u8 *outputData)

{

  sc_apdu_t apdu;

  int r, location, cse;

  size_t len;

  u8 *buffer, *ptr;

  location = (dataLength < MSC_MAX_READ) ? 1 : 2; /* 1 == APDU, 2 == (seed in 0xFFFFFFFE, out in 0xFFFFFFFF) */

  cse = (location == 1) ? SC_APDU_CASE_4_SHORT : SC_APDU_CASE_3_SHORT;

  len = seedLength + 4;

  if (seedLength >= MSC_MAX_SEND - 4 || dataLength >= MSC_MAX_READ - 9)/* Output buffer doesn't seem to operate as desired.... nobody can read/delete */

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS);

  buffer = malloc(len);

  if(!buffer) LOG_FUNC_RETURN(card->ctx, SC_ERROR_OUT_OF_MEMORY);

  ptr = buffer;

  ushort2bebytes(ptr, dataLength);

  ptr+=2;

  ushort2bebytes(ptr, seedLength);

  ptr+=2;

  if(seedLength > 0) {

    memcpy(ptr, seedData, seedLength);

  }

  sc_format_apdu(card, &apdu, cse, 0x62, 0x00, location);

  apdu.data = buffer;

  apdu.datalen = len;

  apdu.lc = len;

  if(location == 1) {

    u8* outputBuffer = malloc(dataLength + 2);

    if(outputBuffer == NULL) {

      free(buffer);

      LOG_FUNC_RETURN(card->ctx, SC_ERROR_OUT_OF_MEMORY);

    };

    apdu.le = dataLength + 2;

    apdu.resp = outputBuffer;

    apdu.resplen = dataLength + 2;

  }

  r = sc_transmit_apdu(card, &apdu);

  if(location == 1) {

    memcpy(outputData, apdu.resp + 2, dataLength);

    free(apdu.resp);

  }

  free(buffer);

  LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

  if(location == 1) {

    if(apdu.sw1 == 0x90 && apdu.sw2 == 0x00) {

      return SC_SUCCESS;

    } else {

      r = sc_check_sw(card, apdu.sw1, apdu.sw2);

      if (r) {

        if (card->ctx->debug >= 2) {

          sc_log(card->ctx,  "got strange SWs: 0x%02X 0x%02X\n",

               apdu.sw1, apdu.sw2);

        }

        LOG_FUNC_RETURN(card->ctx, r);

      }

      LOG_FUNC_RETURN(card->ctx, SC_ERROR_CARD_CMD_FAILED);

    }

  } else {

    if(apdu.sw1 != 0x90 || apdu.sw2 != 0x00) {

      r = sc_check_sw(card, apdu.sw1, apdu.sw2);

      if (r) {

        if (card->ctx->debug >= 2) {

          sc_log(card->ctx,  "got strange SWs: 0x%02X 0x%02X\n",

               apdu.sw1, apdu.sw2);

        }

        LOG_FUNC_RETURN(card->ctx, r);

      }

      LOG_FUNC_RETURN(card->ctx, SC_ERROR_CARD_CMD_FAILED);

    }

    r = msc_read_object(card, inputId, 2, outputData, dataLength);

    if(r < 0)

      LOG_FUNC_RETURN(card->ctx, r);

    msc_delete_object(card, inputId,0);

    LOG_FUNC_RETURN(card->ctx, r);

  }

}

int msc_generate_keypair(sc_card_t *card, int privateKey, int publicKey, int algorithm, size_t keySize, int options)

{

  sc_apdu_t apdu;

  u8 buffer[16]; /* Key pair payload length */

  u8 *ptr = buffer;

  int r;

  unsigned short prRead = 0xFFFF, prWrite = 0x0002, prCompute = 0x0002,

    puRead = 0x0000, puWrite = 0x0002, puCompute = 0x0000;

  if (privateKey > 0x0F || publicKey > 0x0F)

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS);

  sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0x30, privateKey, publicKey);

  *ptr = algorithm; ptr++;

  ushort2bebytes(ptr, keySize);

  ptr+=2;

  ushort2bebytes(ptr, prRead);

  ptr+=2;

  ushort2bebytes(ptr, prWrite);

  ptr+=2;

  ushort2bebytes(ptr, prCompute);

  ptr+=2;

  ushort2bebytes(ptr, puRead);

  ptr+=2;

  ushort2bebytes(ptr, puWrite);

  ptr+=2;

  ushort2bebytes(ptr, puCompute);

  ptr+=2;

  *ptr = 0; /* options; -- no options for now, they need extra data */

  apdu.data = buffer;

  apdu.datalen = 16;

  apdu.lc = 16;

  r = sc_transmit_apdu(card, &apdu);

  LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

  if(apdu.sw1 == 0x90 && apdu.sw2 == 0x00) {

    return 0;

  }

  r = sc_check_sw(card, apdu.sw1, apdu.sw2);

  if (r) {

    if (card->ctx->debug >= 2) {

      sc_log(card->ctx,  "got strange SWs: 0x%02X 0x%02X\n",

           apdu.sw1, apdu.sw2);

    }

    LOG_FUNC_RETURN(card->ctx, r);

  }

  LOG_FUNC_RETURN(card->ctx, SC_ERROR_CARD_CMD_FAILED);

}

int msc_extract_key(sc_card_t *card,

      int keyLocation)

{

  sc_apdu_t apdu;

  u8 encoding = 0;

  int r;

  sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0x34, keyLocation, 0x00);

  apdu.data = &encoding;

  apdu.datalen = 1;

  apdu.lc = 1;

  r = sc_transmit_apdu(card, &apdu);

  LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

  if(apdu.sw1 == 0x90 && apdu.sw2 == 0x00) {

    return 0;

  }

  r = sc_check_sw(card, apdu.sw1, apdu.sw2);

  if (r) {

    if (card->ctx->debug >= 2) {

      sc_log(card->ctx,  "got strange SWs: 0x%02X 0x%02X\n",

           apdu.sw1, apdu.sw2);

    }

    LOG_FUNC_RETURN(card->ctx, r);

  }

  LOG_FUNC_RETURN(card->ctx, SC_ERROR_CARD_CMD_FAILED);

}

int msc_extract_rsa_public_key(sc_card_t *card,

      int keyLocation,

      size_t* modLength,

      u8** modulus,

      size_t* expLength,

      u8** exponent)

{

  int r;

  u8 buffer[1024]; /* Should be plenty... */

  int fileLocation = 1;

  r = msc_extract_key(card, keyLocation);

  if(r < 0) LOG_FUNC_RETURN(card->ctx, r);

  /* Read keyType, keySize, and what should be the modulus size */

  r = msc_read_object(card, inputId, fileLocation, buffer, 5);

  fileLocation += 5;

  if(r < 0) LOG_FUNC_RETURN(card->ctx, r);

  if(buffer[0] != MSC_RSA_PUBLIC) LOG_FUNC_RETURN(card->ctx, SC_ERROR_UNKNOWN_DATA_RECEIVED);

  *modLength = (buffer[3] << 8) | buffer[4];

  /* Read the modulus and the exponent length */

  if (*modLength + 2 > sizeof buffer)

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_OUT_OF_MEMORY);

  r = msc_read_object(card, inputId, fileLocation, buffer, *modLength + 2);

  fileLocation += *modLength + 2;

  if(r < 0) LOG_FUNC_RETURN(card->ctx, r);

  *modulus = malloc(*modLength);

  if(!*modulus) LOG_FUNC_RETURN(card->ctx, SC_ERROR_OUT_OF_MEMORY);

  memcpy(*modulus, buffer, *modLength);

  *expLength = (buffer[*modLength] << 8) | buffer[*modLength + 1];

  if (*expLength > sizeof buffer) {

    free(*modulus); *modulus = NULL;

    return SC_ERROR_OUT_OF_MEMORY;

  }

  r = msc_read_object(card, inputId, fileLocation, buffer, *expLength);

  if(r < 0) {

    free(*modulus); *modulus = NULL;

    LOG_FUNC_RETURN(card->ctx, r);

  }

  *exponent = malloc(*expLength);

  if(!*exponent) {

    free(*modulus);

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_OUT_OF_MEMORY);

  }

  memcpy(*exponent, buffer, *expLength);

  return 0;

}

/* For the moment, only support streaming data to the card

  in blocks, not through file IO */

int msc_compute_crypt_init(sc_card_t *card,

      int keyLocation,

      int cipherMode,

      int cipherDirection,

      const u8* initData,

      u8* outputData,

      size_t dataLength,

      size_t* outputDataLength)

{

  sc_apdu_t apdu;

  u8 buffer[MSC_MAX_APDU];

  u8 *ptr;

  int r;

  u8 outputBuffer[MSC_MAX_APDU + 2];

  sc_format_apdu(card, &apdu, SC_APDU_CASE_4_SHORT, 0x36, keyLocation, 0x01); /* Init */

  apdu.data = buffer;

  apdu.datalen = dataLength + 5;

  apdu.lc = dataLength + 5;

  memset(outputBuffer, 0, sizeof(outputBuffer));

  apdu.resp = outputBuffer;

  apdu.resplen = dataLength + 2;

  apdu.le = dataLength + 2;

  ptr = buffer;

  *ptr = cipherMode; ptr++;

  *ptr = cipherDirection; ptr++;

  *ptr = 0x01; ptr++; /* DATA LOCATION: APDU */

  *ptr = (dataLength >> 8) & 0xFF; ptr++;

  *ptr = dataLength & 0xFF; ptr++;

  memcpy(ptr, initData, dataLength);

  r = sc_transmit_apdu(card, &apdu);

  LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

  if(apdu.sw1 == 0x90 && apdu.sw2 == 0x00) {

    short receivedData = outputBuffer[0] << 8 | outputBuffer[1];

    *outputDataLength = receivedData;

    if (receivedData > MSC_MAX_APDU)

      LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_DATA);

    memcpy(outputData, outputBuffer + 2, receivedData);

    return 0;

  }

  r = sc_check_sw(card, apdu.sw1, apdu.sw2);

  if (r) {

    if (card->ctx->debug >= 2) {

      sc_log(card->ctx,  "init: got strange SWs: 0x%02X 0x%02X\n",

           apdu.sw1, apdu.sw2);

    }

    LOG_FUNC_RETURN(card->ctx, r);

  }

  LOG_FUNC_RETURN(card->ctx, SC_ERROR_CARD_CMD_FAILED);

}

int msc_compute_crypt_final(

      sc_card_t *card,

      int keyLocation,

      const u8* inputData,

      u8* outputData,

      size_t dataLength,

      size_t* outputDataLength)

{

  sc_apdu_t apdu;

  u8 buffer[MSC_MAX_APDU];

  u8 outputBuffer[MSC_MAX_APDU + 2];

  u8 *ptr;

  int r;

  sc_format_apdu(card, &apdu, SC_APDU_CASE_4, 0x36, keyLocation, 0x03); /* Final */

  apdu.data = buffer;

  apdu.datalen = dataLength + 3;

  apdu.lc = dataLength + 3;

  memset(outputBuffer, 0, sizeof(outputBuffer));

  apdu.resp = outputBuffer;

  apdu.resplen = dataLength + 2;

  apdu.le = dataLength +2;

  ptr = buffer;

  *ptr = 0x01; ptr++; /* DATA LOCATION: APDU */

  *ptr = (dataLength >> 8) & 0xFF; ptr++;

  *ptr = dataLength & 0xFF; ptr++;

  memcpy(ptr, inputData, dataLength);

  r = sc_transmit_apdu(card, &apdu);

  LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

  if(apdu.sw1 == 0x90 && apdu.sw2 == 0x00) {

    short receivedData = outputBuffer[0] << 8 | outputBuffer[1];

    *outputDataLength = receivedData;

    if (receivedData > MSC_MAX_APDU)

      LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_DATA);

    memcpy(outputData, outputBuffer + 2, receivedData);

    return 0;

  }

  r = sc_check_sw(card, apdu.sw1, apdu.sw2);

  if (r) {

    if (card->ctx->debug >= 2) {

      sc_log(card->ctx,  "final: got strange SWs: 0x%02X 0x%02X\n",

           apdu.sw1, apdu.sw2);

    }

    LOG_FUNC_RETURN(card->ctx, r);

  }

  LOG_FUNC_RETURN(card->ctx, SC_ERROR_CARD_CMD_FAILED);

}

/* Stream data to the card through file IO */

static int msc_compute_crypt_final_object(

      sc_card_t *card,

      int keyLocation,

      const u8* inputData,

      u8* outputData,

      size_t dataLength,

      size_t* outputDataLength)

{

  sc_apdu_t apdu;

  u8 buffer[MSC_MAX_APDU];

  u8 *ptr;

  int r;

  sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0x36, keyLocation, 0x03); /* Final */

  apdu.data = buffer;

  apdu.datalen = 1;

  apdu.lc = 1;

  ptr = buffer;

  *ptr = 0x02;

  ptr++; /* DATA LOCATION: OBJECT */

  *ptr = (dataLength >> 8) & 0xFF;

  ptr++;

  *ptr = dataLength & 0xFF;

  ptr++;

  memcpy(ptr, inputData, dataLength);

  r = msc_create_object(card, outputId, dataLength + 2, 0x02, 0x02, 0x02);

  if(r < 0) {

    if(r == SC_ERROR_FILE_ALREADY_EXISTS) {

      r = msc_delete_object(card, outputId, 0);

      if(r < 0) {

        SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, r);

      }

      r = msc_create_object(card, outputId, dataLength + 2, 0x02, 0x02, 0x02);

      if(r < 0) {

        SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, r);

      }

    }

  }

  r = msc_update_object(card, outputId, 0, buffer + 1, dataLength + 2);

  if(r < 0) return r;

  r = sc_transmit_apdu(card, &apdu);

  LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

  if(apdu.sw1 == 0x90 && apdu.sw2 == 0x00) {

    r = msc_read_object(card, inputId, 2, outputData, dataLength);

    if (r >= 0)

      *outputDataLength = r;

    msc_delete_object(card, outputId, 0);

    msc_delete_object(card, inputId, 0);

    return r;

  }

  r = sc_check_sw(card, apdu.sw1, apdu.sw2);

  if (r) {

    if (card->ctx->debug >= 2) {

      sc_log(card->ctx,  "final: got strange SWs: 0x%02X 0x%02X\n",

           apdu.sw1, apdu.sw2);

    }

  } else {

    r = SC_ERROR_CARD_CMD_FAILED;

  }

  /* this is last ditch cleanup */

  msc_delete_object(card, outputId, 0);

  LOG_FUNC_RETURN(card->ctx, r);

}

int msc_compute_crypt(sc_card_t *card,

      int keyLocation,

      int cipherMode,

      int cipherDirection,

      const u8* data,

      u8* outputData,

      size_t dataLength,

      size_t outputDataLength)

{

  size_t left = dataLength;

  const u8* inPtr = data;

  u8* outPtr = outputData;

  int toSend;

  int r;

  size_t received = 0;

  if (outputDataLength < dataLength)

    LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS);

  /* Don't send data during init... apparently current version does not support it */

  toSend = 0;

  r = msc_compute_crypt_init(card,

    keyLocation,

    cipherMode,

    cipherDirection,

    inPtr,

    outPtr,

    toSend,

    &received);

  if(r < 0) LOG_FUNC_RETURN(card->ctx, r);