text: /********************************************************************************/
  /*										*/
  /*			   EncryptDecrypt					*/
  /*			     Written by Ken Goldman				*/
  /*		       IBM Thomas J. Watson Research Center			*/
  /*										*/
  /* (c) Copyright IBM Corporation 2015 - 2019.					*/
  /*										*/
  /* All rights reserved.								*/
  /* 										*/
  /* Redistribution and use in source and binary forms, with or without		*/
  /* modification, are permitted provided that the following conditions are	*/
  /* met:										*/
  /* 										*/
  /* Redistributions of source code must retain the above copyright notice,	*/
  /* this list of conditions and the following disclaimer.			*/
  /* 										*/
  /* Redistributions in binary form must reproduce the above copyright		*/
  /* notice, this list of conditions and the following disclaimer in the		*/
  /* documentation and/or other materials provided with the distribution.		*/
  /* 										*/
  /* Neither the names of the IBM Corporation nor the names of its		*/
  /* contributors may be used to endorse or promote products derived from		*/
  /* this software without specific prior written permission.			*/
  /* 										*/
  /* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS		*/
  /* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT		*/
  /* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR	*/
  /* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT		*/
  /* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,	*/
  /* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT		*/
  /* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	*/
  /* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	*/
  /* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT		*/
  /* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	*/
  /* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.		*/
  /********************************************************************************/
  
  /* 
  
  */
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <stdint.h>
  
  #include <ibmtss/tss.h>
  #include <ibmtss/tssutils.h>
  #include <ibmtss/tssresponsecode.h>
  #include <ibmtss/tssmarshal.h>
  
  
  static void printDecrypt(EncryptDecrypt_Out *out);
  static void printUsage(void);
  
  extern int tssUtilsVerbose;
  
  int main(int argc, char *argv[])
  {
      TPM_RC			rc = 0;
      int				i;    /* argc iterator */
      TSS_CONTEXT			*tssContext = NULL;
      EncryptDecrypt_In 		in;
      EncryptDecrypt_Out 		out;
      EncryptDecrypt2_In 		in2;
      TPMI_DH_OBJECT		keyHandle = 0;
      const char			*inFilename = NULL;
      const char			*outFilename = NULL;
      TPMI_YES_NO			decrypt = NO;
      int				two = FALSE;
      const char			*keyPassword = NULL; 
      TPMI_SH_AUTH_SESSION    	sessionHandle0 = TPM_RS_PW;
      unsigned int		sessionAttributes0 = 0;
      TPMI_SH_AUTH_SESSION    	sessionHandle1 = TPM_RH_NULL;
      unsigned int		sessionAttributes1 = 0;
      TPMI_SH_AUTH_SESSION    	sessionHandle2 = TPM_RH_NULL;
      unsigned int		sessionAttributes2 = 0;
  
      uint16_t			written;
      size_t			length;
      uint8_t			*buffer = NULL;		/* for the free */
      uint8_t			*buffer1 = NULL;	/* for marshaling */
  
      setvbuf(stdout, 0, _IONBF, 0);      /* output may be going through pipe to log file */
      TSS_SetProperty(NULL, TPM_TRACE_LEVEL, "1");
      tssUtilsVerbose = FALSE;
      
      /* command line argument defaults */
      
      for (i=1 ; (i<argc) && (rc == 0) ; i++) {
  	if (strcmp(argv[i],"-hk") == 0) {
  	    i++;
  	    if (i < argc) {
  		sscanf(argv[i],"%x",&keyHandle);
  	    }
  	    else {
  		printf("Missing parameter for -hk\n");
  		printUsage();
  	    }
  	}
  	else if (strcmp(argv[i],"-pwdk") == 0) {
  	    i++;
  	    if (i < argc) {
  		keyPassword = argv[i];
  	    }
  	    else {
  		printf("-pwdk option needs a value\n");
  		printUsage();
  	    }
  	}
  	else if (strcmp(argv[i],"-if") == 0) {
  	    i++;
  	    if (i < argc) {
  		inFilename = argv[i];
  	    }
  	    else {
  		printf("-if option needs a value\n");
  		printUsage();
  	    }
  	}
  	else if (strcmp(argv[i],"-of") == 0) {
  	    i++;
  	    if (i < argc) {
  		outFilename = argv[i];
  	    }
  	    else {
  		printf("-of option needs a value\n");
  		printUsage();
  	    }
  	}
   	else if (strcmp(argv[i],"-d") == 0) {
  	    decrypt = YES;
  	}
   	else if (strcmp(argv[i],"-2") == 0) {
  	    two = TRUE;
  	}
   	else if (strcmp(argv[i],"-se0") == 0) {
  	    i++;
  	    if (i < argc) {
  		sscanf(argv[i],"%x", &sessionHandle0);
  	    }
  	    else {
  		printf("Missing parameter for -se0\n");
  		printUsage();
  	    }
  	    i++;
  	    if (i < argc) {
  		sscanf(argv[i],"%x", &sessionAttributes0);
  		if (sessionAttributes0 > 0xff) {
  		    printf("Out of range session attributes for -se0\n");
  		    printUsage();
  		}
  	    }
  	    else {
  		printf("Missing parameter for -se0\n");
  		printUsage();
  	    }
  	}
  	else if (strcmp(argv[i],"-se1") == 0) {
  	    i++;
  	    if (i < argc) {
  		sscanf(argv[i],"%x", &sessionHandle1);
  	    }
  	    else {
  		printf("Missing parameter for -se1\n");
  		printUsage();
  	    }
  	    i++;
  	    if (i < argc) {
  		sscanf(argv[i],"%x", &sessionAttributes1);
  		if (sessionAttributes1 > 0xff) {
  		    printf("Out of range session attributes for -se1\n");
  		    printUsage();
  		}
  	    }
  	    else {
  		printf("Missing parameter for -se1\n");
  		printUsage();
  	    }
  	}
  	else if (strcmp(argv[i],"-se2") == 0) {
  	    i++;
  	    if (i < argc) {
  		sscanf(argv[i],"%x", &sessionHandle2);
  	    }
  	    else {
  		printf("Missing parameter for -se2\n");
  		printUsage();
  	    }
  	    i++;
  	    if (i < argc) {
  		sscanf(argv[i],"%x", &sessionAttributes2);
  		if (sessionAttributes2 > 0xff) {
  		    printf("Out of range session attributes for -se2\n");
  		    printUsage();
  		}
  	    }
  	    else {
  		printf("Missing parameter for -se2\n");
  		printUsage();
  	    }
  	}
  	else if (strcmp(argv[i],"-h") == 0) {
  	    printUsage();
  	}
  	else if (strcmp(argv[i],"-v") == 0) {
  	    tssUtilsVerbose = TRUE;
  	    TSS_SetProperty(NULL, TPM_TRACE_LEVEL, "2");
  	}
  	else {
  	    printf("\n%s is not a valid option\n", argv[i]);
  	    printUsage();
  	}
      }
      if (keyHandle == 0) {
  	printf("Missing handle parameter -hk\n");
  	printUsage();
      }
      if (inFilename == NULL) {
  	printf("Missing encrypted message -if\n");
  	printUsage();
      }
      if (rc == 0) {
  	rc = TSS_File_ReadBinaryFile(&buffer,     /* freed @1 */
  				     &length,
  				     inFilename);
      }
      if (rc == 0) {
  	if (length > sizeof(in.inData.t.buffer)) {
  	    printf("Input data too long %u\n", (uint32_t)length);
  	    rc = TSS_RC_INSUFFICIENT_BUFFER;
  	}
      }
      if (rc == 0) {
  	if (!two) {	/* use TPM_CC_EncryptDecrypt */
  	    /* the symmetric key used for the operation */
  	    in.keyHandle = keyHandle;
  	    /* if YES, then the operation is decryption; if NO, the operation is encryption */
  	    in.decrypt = decrypt;
  	    /* symmetric mode */
  	    in.mode = TPM_ALG_NULL;
  	    /* an initial value as required by the algorithm */
  	    in.ivIn.t.size = MAX_SYM_BLOCK_SIZE;
  	    memset(in.ivIn.t.buffer, 0, MAX_SYM_BLOCK_SIZE);
  	    /* the data to be encrypted/decrypted */
  	    in.inData.t.size = (uint16_t)length;
  	    if (length > 0) {	/* if length is 0, buffer is NULL */
  		memcpy(in.inData.t.buffer, buffer, length);
  	    }
  	}
  	else {
  	    /* the symmetric key used for the operation */
  	    in2.keyHandle = keyHandle;
  	    /* if YES, then the operation is decryption; if NO, the operation is encryption */
  	    in2.decrypt = decrypt;
  	    /* symmetric mode */
  	    in2.mode = TPM_ALG_NULL;
  	    /* an initial value as required by the algorithm */
  	    in2.ivIn.t.size = MAX_SYM_BLOCK_SIZE;
  	    memset(in2.ivIn.t.buffer, 0, MAX_SYM_BLOCK_SIZE);
  	    /* the data to be encrypted/decrypted */
  	    in2.inData.t.size = (uint16_t)length;
  	    if (length > 0) {	/* if length is 0, buffer is NULL */
  		memcpy(in2.inData.t.buffer, buffer, length);
  	    }
  	}
      }
      free (buffer);	/* @1 */
      buffer = NULL;
  
      /* Start a TSS context */
      if (rc == 0) {
  	rc = TSS_Create(&tssContext);
      }
      /* call TSS to execute the command */
      if (rc == 0) {
  	if (!two) {	/* use TPM_CC_EncryptDecrypt */
  	    rc = TSS_Execute(tssContext,
  			     (RESPONSE_PARAMETERS *)&out,
  			     (COMMAND_PARAMETERS *)&in,
  			     NULL,
  			     TPM_CC_EncryptDecrypt,
  			     sessionHandle0, keyPassword, sessionAttributes0,
  			     sessionHandle1, NULL, sessionAttributes1,
  			     sessionHandle2, NULL, sessionAttributes2,
  			     TPM_RH_NULL, NULL, 0);
  	}
  	else {	/* use TPM_CC_EncryptDecrypt2 */
  	    rc = TSS_Execute(tssContext,
  			     (RESPONSE_PARAMETERS *)&out,
  			     (COMMAND_PARAMETERS *)&in2,
  			     NULL,
  			     TPM_CC_EncryptDecrypt2,
  			     sessionHandle0, keyPassword, sessionAttributes0,
  			     sessionHandle1, NULL, sessionAttributes1,
  			     sessionHandle2, NULL, sessionAttributes2,
  			     TPM_RH_NULL, NULL, 0);
  	}
      }
      {
  	TPM_RC rc1 = TSS_Delete(tssContext);
  	if (rc == 0) {
  	    rc = rc1;
  	}
      }
      if ((rc == 0) && (outFilename != NULL)) {
  	written = 0;
  	rc = TSS_TPM2B_MAX_BUFFER_Marshalu(&out.outData, &written, NULL, NULL);
      }
      if ((rc == 0) && (outFilename != NULL)) {
  	buffer = realloc(buffer, written);	/* freed @2 */
  	buffer1 = buffer;
  	written = 0;
  	rc = TSS_TPM2B_MAX_BUFFER_Marshalu(&out.outData, &written, &buffer1, NULL);
      }    
      if ((rc == 0) && (outFilename != NULL)) {
  	rc = TSS_File_WriteBinaryFile(buffer + sizeof(uint16_t),
  				      written - sizeof(uint16_t),
  				      outFilename);
      }    
      free(buffer);	/* @2 */
      if (rc == 0) {
  	if (tssUtilsVerbose) printDecrypt(&out);
  	if (tssUtilsVerbose) printf("encryptdecrypt: success\n");
      }
      else {
  	const char *msg;
  	const char *submsg;
  	const char *num;
  	printf("encryptdecrypt: failed, rc %08x\n", rc);
  	TSS_ResponseCode_toString(&msg, &submsg, &num, rc);
  	printf("%s%s%s\n", msg, submsg, num);
  	rc = EXIT_FAILURE;
      }
      return rc;
  }
  
  static void printDecrypt(EncryptDecrypt_Out *out)
  {
      TSS_PrintAll("outData", out->outData.t.buffer, out->outData.t.size);
  }
  
  static void printUsage(void)
  {
      printf("\n");
      printf("encryptdecrypt\n");
      printf("\n");
      printf("Runs TPM2_EncryptDecrypt\n");
      printf("\n");
      printf("\t-hk\tkey handle\n");
      printf("\t-pwdk\tpassword for key (default empty)\n");
      printf("\t-d\tdecrypt (default encrypt)\n");
      printf("\t-if\tinput file name\n");
      printf("\t[-of\toutput file name (default do not save)]\n");
      printf("\t[-2\tuse TPM2_EncryptDecrypt2]\n");
      printf("\n");
      printf("\t-se[0-2] session handle / attributes (default PWAP)\n");
      printf("\t01\tcontinue\n");
      printf("\t20\tcommand decrypt\n");
      printf("\t40\tresponse encrypt\n");
      exit(1);	
  }
  