123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178 |
- // Knows only protobuf_sgx objects, protobuf header.
- // For socket programming
- #include <sys/socket.h>
- #include <stdlib.h>
- #include <netinet/in.h>
- #include <string.h>
- #include <errno.h>
- #include<unistd.h>
- #include <stdio.h>
- #include "dhmsgs.pb.h"
- #include <google/protobuf/io/coded_stream.h>
- #include <google/protobuf/io/zero_copy_stream_impl.h>
- using namespace google::protobuf::io;
- #include "protobufLAInitiator.h"
- // TODO: Make these private functions
- int read_protobuf_msg_from_fd(int accept_fd, google::protobuf::MessageLite& message)
- {
- ZeroCopyInputStream* raw_input;
- CodedInputStream* coded_input;
- uint32_t size;
- CodedInputStream::Limit limit;
- raw_input = new FileInputStream(accept_fd);
- coded_input = new CodedInputStream(raw_input);
- if(!coded_input->ReadVarint32(&size))
- {
- printf("Error in reading size of msg");
- fflush(stdout);
- return -1;
- }
- //printf("size of msg was read to be %" PRIu32 " \n", size);
- fflush(stdout);
- limit = coded_input->PushLimit(size);
- if(!message.ParseFromCodedStream(coded_input))
- {
- printf("Error in parsing msg");
- fflush(stdout);
- return -1;
- }
- coded_input->PopLimit(limit);
- return 0;
- }
- // TODO: private functions
- int write_protobuf_msg_to_fd(int accept_fd, google::protobuf::MessageLite& message)
- {
- ZeroCopyOutputStream* raw_output = new FileOutputStream(accept_fd);
- CodedOutputStream* coded_output = new CodedOutputStream(raw_output);
- coded_output->WriteVarint32(message.ByteSize());
- if(!message.SerializeToCodedStream(coded_output))
- {
- printf("SerializeToCodedStream failed");
- fflush(stdout);
- return -1;
- }
- // As per this - https://stackoverflow.com/questions/22881876/protocol-buffers-how-to-serialize-and-deserialize-multiple-messages-into-a-file?noredirect=1&lq=1
- // TODO: There may be a better way to do this - 1) this happens with every accept now and 2) make it happen on the stack vs heap - destructor will be called on return from this function (main) and the items will then be written out. (We probably don't want that, actually)
- delete coded_output;
- delete raw_output;
- fflush(stdout);
- return 0;
- }
- // Sets up a socket to bind and listen to the given port. Returns FD of the socket on success, -1 on failure (and prints a msg to stdout with the errno)
- int set_up_socket(int port, sockaddr_in* address)
- {
- int server_fd = 0;
- // Creating socket file descriptor for listening for attestation requests.
- server_fd = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0);
- if (server_fd == -1)
- {
- printf("Error in creating a socket - %d", errno);
- return -1;
- }
- // Preparing the address struct for binding
- address->sin_family = AF_INET;
- address->sin_addr.s_addr = INADDR_ANY; // Todo: should this be localhost?
- address->sin_port = htons(port);
- // memset(address->sin_zero,0,sizeof(address->sin_zero));
- socklen_t addrlen = sizeof(*address);
- // Binding
- if (bind(server_fd, (sockaddr*)address, addrlen)<0)
- {
- printf("Error in binding %d - port was %d - ", errno, port);
- return -1;
- }
- // Listening
- if (listen(server_fd, 128) < 0)
- {
- printf("Error in listening %d", errno);
- return -1;
- }
- return server_fd;
- }
- int local_attestation_initiator(int port, uint32_t own_enclave_id)
- {
- // declare msg1, msg2, msg3 protobuf objects
- protobuf_sgx_dh_msg1_t protobuf_msg1;
- protobuf_sgx_dh_msg2_t protobuf_msg2;
- protobuf_sgx_dh_msg3_t protobuf_msg3;
- uint32_t protobuf_sgx_ret; uint32_t sgx_ret;
- // For socket to listen to the Apache enclave.
- int server_fd=0; int accept_fd = 0;
- struct sockaddr_in own_addr;
- struct sockaddr_storage apache_addr; socklen_t apache_addr_size = sizeof(apache_addr);
- uint32_t session_id; uint8_t read_or_write;
- size_t bytes_read_post_la; uint8_t encrypted_apache_mrsigner_and_tag[48]; uint8_t plaintext[32];
- // int counter;
- server_fd=set_up_socket(port, &own_addr);
- if(server_fd==-1)
- return -1;
- printf("Successfully set up a socket to communicate with the Apache enclave.\n");
- fflush(stdout);
- protobuf_sgx_ret = generate_protobuf_dh_msg1(own_enclave_id, protobuf_msg1, &session_id);
- if(protobuf_sgx_ret != 0)
- {
- printf("Error in generate_protobuf_dh_msg1: 0x%x", protobuf_sgx_ret); fflush(stdout); return protobuf_sgx_ret;
- }
- accept_fd = accept(server_fd, (struct sockaddr *)&apache_addr,&apache_addr_size);
- if (accept_fd <0)
- {
- printf("Error in accepting %d", errno);
- return -1;
- }
- printf("Accepted fd\n"); fflush(stdout);
- if(write_protobuf_msg_to_fd(accept_fd, protobuf_msg1)!=0)
- return -1;
- if(read_protobuf_msg_from_fd(accept_fd, protobuf_msg2)!=0)
- return -1;
- protobuf_sgx_ret = process_protobuf_dh_msg2_generate_protobuf_dh_msg3(own_enclave_id, protobuf_msg2, protobuf_msg3, &session_id, &read_or_write);
- if(protobuf_sgx_ret != 0)
- {
- printf("Error in generate_protobuf_dh_msg2: 0x%x", protobuf_sgx_ret); fflush(stdout); return protobuf_sgx_ret;
- }
- if(write_protobuf_msg_to_fd(accept_fd, protobuf_msg3)!=0)
- return -1;
- if(read_or_write)
- {
- bytes_read_post_la=read(accept_fd, encrypted_apache_mrsigner_and_tag, 32);
- if(bytes_read_post_la!=32)
- {
- printf("Not all of the encrypted apache's mrsigner was read from the verifier.\n"); fflush(stdout); return 0xfe;
- }
- bytes_read_post_la=read(accept_fd, encrypted_apache_mrsigner_and_tag+32, 16);
- if(bytes_read_post_la!=16)
- {
- printf("Not all of the encrypted apache's mrsigner **tag** was read from the verifier.\n"); fflush(stdout); return 0xfe;
- }uint32_t count;
- for(count=0;count<48;count++)
- printf("0x%02x ", encrypted_apache_mrsigner_and_tag[count]);
- printf("\n");fflush(stdout);
- sgx_ret=decrypt_wrapper(own_enclave_id, encrypted_apache_mrsigner_and_tag, 32, encrypted_apache_mrsigner_and_tag+32 , plaintext);
- if(sgx_ret!=0)
- {
- printf("Error in decryption: 0x%x\n", sgx_ret); fflush(stdout); return sgx_ret;
- }
- printf("Successful decryption\n"); fflush(stdout);
- }
- printf("Successfully done Local attestation\n");
- fflush(stdout);
- return 0;
-
- }
|