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#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/select.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <sys/errno.h>
#include <cstring>
#include <cstdlib>
#include <map>
using namespace std;
#define PICA_REGISTRAR_PORT 2299
#define READ_BUF_SIZE 4096
#define WRITE_BUF_SIZE 8192
char read_buf[READ_BUF_SIZE];
char write_buf[WRITE_BUF_SIZE];
unsigned int current_id = 30 000;
int read_CSR(int client_socket, int *bytes_read)
{
int pos = 0;
int disconnect_flag = 0;
do
{
ret = recv(client_socket, read_buf + pos, READ_BUF_SIZE - 1 - pos, 0);
if (ret > 0)
pos += ret;
else
{
disconnect_flag = 1;
if (ret < 0)
perror("recv");
}
read_buf[pos + 1] = '\0';
*bytes_read = pos;
}
while(pos < READ_BUF_SIZE && !disconnect_flag && !std::strstr(read_buf, "-----END CERTIFICATE REQUEST-----"));
return disconnect_flag;
}
int store_CSR(std::string csr_filename, int csr_size)
{
FILE *csr_temp;
csr_temp = fopen(csr_filename.c_str, "w");
if (!csr_temp)
{
perror("fopen");
return 1;
}
ret = fwrite(read_buf, csr_size, 1, csr_temp);
if (ret != 1)
{
perror("fwrite");
fclose(csr_temp);
remove(csr_filename.c_str);
return 1;
}
fclose(csr_temp);
return 0;
}
int main(int argc, char *argv[])
{
int socket, client_socket, ret, pos, disconnect_flag, bytes_read, cert_size;
struct sockaddr_in sd, sc;
socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
memset(&sd,0,sizeof(sd));
sd.sin_family = AF_INET;
sd.sin_addr.s_addr = INADDR_ANY;
sd.sin_port = htons(PICA_REGISTRAR_PORT);
ret = bind(socket,(struct sockaddr*)&sd,sizeof(sd));
ret = listen(socket, 60);
while (1)
{
memset(&sc, 0, sizeof(sc));
client_socket = accept(socket, (struct sockaddr*)&sc, sizeof(sc) );
if (client_socket >= 0)
{
disconnect_flag = read_CSR(client_socket, &bytes_read);
if (disconnect_flag)
continue;
{
FILE *cert;
std::string filename = (string("/tmp/CSR-") + inet_ntoa(sc.sin_addr) );
if (store_CSR(filename, bytes_read))
continue;
std::string cert_filename = atoi(current_id) + ".pem";
std::string sign_command = "openssl ca -config ca_config.txt -utf8 -subj /CN=" + atoi(current_id) + "\\#tester -batch -notext -out " + cert_filename + " -in " + csr_temp;
puts(sign_command.c_str);//debug
system(sign_command.c_str);
//get file size
{
struct stat st;
if (stat(cert_filename.c_str(), &st))
continue;
cert_size = st.st_size;
}
cert = fopen(cert_filename, "r");
if (!cert)
{
perror("fopen");
remove(filename.c_str);
remove(cert_filename);
continue;
}
//send
current_id++;
remove(filename.c_str);
}
}
else
perror("accept");
}
return 0;
}
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