#include <string.h>
#include <string>
#include <unistd.h>
#include <errno.h>

#include <fcntl.h>
#include <sys/types.h> 
#include <sys/stat.h> 


#include "ipc.h"
#include "SgxLAInititator.h"
#include "SealerWrapper.h"
#include "SgxCrypto.h" 
using namespace std;

#define DECRYPTOR_PORT 3825
#define SGX_HASH_SIZE 32
int __ImageBase=0;
int verify_apache(std::string& path, std::string& keypair) {return 0; }

int local_attestation(int port, uint8_t* mr_enclave, uint8_t* mr_signer, uint8_t* send_mr_signer)
{
  int decryptor_fd;
  setbuf(stdout,NULL);
  decryptor_fd=set_up_socket_connect(port);
  if(decryptor_fd!=-1)
  {
    printf("Set up a socket with the other module\n");
    return create_session(decryptor_fd, mr_enclave, mr_signer, send_mr_signer);
  }
  else
    return 0xFFFFFFFF;
}

int main(int argc, char** argv)
{
  // TODO: Generation of keys used to sign Apache Enclave.
  uint8_t expected_apache_mr_signer[SGX_HASH_SIZE] = {0x3};
  std::string apache_signature_keypair_private("1234567890");
  std::string apache_public_key;
  uint8_t decryptor_mr_enclave[SGX_HASH_SIZE] = {0x1};
  uint8_t decryptor_mr_signer[SGX_HASH_SIZE] = {0x2};
  uint32_t return_sgx; uint32_t return_internal;
  std::string recovered_plaintext;
  uint32_t expected_sealed_msg_size=0;
/*
  printf("about to generate rsa key pair\n");
  fflush(stdout); 
  return_sgx=create_rsa_key_pair_for_signing_manifest();
  if(return_sgx!=0)
  {
	printf("Could not successfully create rsa key pair.\n"); 
	fflush(stdout); 
	return 0xFFFFFFFF;
  }
  printf("generated rsa key pair\n");
  fflush(stdout); */

  int sealed_file_fd = open("sealed_msg.txt", O_CREAT | O_RDWR, S_IRUSR | S_IWUSR);
  if(sealed_file_fd == -1)
  {
    perror("\nError in opening or creating the file sealed_msg.txt - ");
    fflush(stderr);
    return 0xFFFFFFFF;
  }
  printf("\nSuccessfully opened a file to seal the apache signature keypair to.\n");
  fflush(stdout);
  return_sgx = seal_message_to_file(sealed_file_fd, apache_signature_keypair_private, &expected_sealed_msg_size);
  if(return_sgx!=0 && return_sgx!=0xFFFFFFFF)
  {
    printf("Sealing SGX error %x", return_sgx);
    fflush(stdout);
    return return_sgx;
  }
  else if(return_sgx == 0xFFFFFFFF)
  {
    perror("Successful SGX sealing, but error in writing to a file or write returned 0 bytes because the disk was full etc.\n");
    fflush(stdout);
    return return_sgx;
  }
  printf("\n Successfully sealed the plaintext %s to length 0x%x.\n", apache_signature_keypair_private.c_str(), expected_sealed_msg_size);
  fflush(stdout);

  return_sgx = local_attestation(DECRYPTOR_PORT, decryptor_mr_enclave, decryptor_mr_signer, expected_apache_mr_signer);
  if(return_sgx != 0)
  {
    if(return_sgx== 0xFFFFFFFF)
    {
      perror("\nCould not set up the socket: had the following error: ");
      fflush(stderr);
    }
    else
    {
      printf("\nHad the following error in SGX local attestation: %d", return_sgx);
      fflush(stdout);
    }
    return return_sgx;
  }
  printf("\nSuccessful LA with port %d.\n", DECRYPTOR_PORT);
  fflush(stdout);

  sleep(50);
  printf("\n z z z z z z  z z z z z z z  (sleeping for a bit) z z z z z  z z z (meant to emulate the '2nd' stage of validator, that will be rerun whenever Apache changes)\n");
  return_sgx = unseal_message_from_file(sealed_file_fd, recovered_plaintext, &expected_sealed_msg_size);
  if(return_sgx!=0 && return_sgx!=0xFFFFFFFF)
  {
    printf("Successful read from file, but error in SGX unsealing: %x.\n", return_sgx);
    fflush(stdout);
    return return_sgx;
  }
  else if(return_sgx == 0xFFFFFFFF)
  {
    perror("\n Could not read the file.\n");
    fflush(stdout);
    return return_sgx;
  }
  printf("\n Unsealed the keypair.\n");
  fflush(stdout);

  std::string path("../apache/source/code/path");
  return_internal = verify_apache(path, apache_signature_keypair_private);
  if(return_internal != 0)
  {
    printf("\nThe signed manifest was not created due to the above errors.\n");
    fflush(stdout);
    return return_internal;
  }
  printf("Successfully verified the Apache enclave and signed its manifest.\n");
  fflush(stdout);
  return 0;


}