294 lines
9.1 KiB
C
294 lines
9.1 KiB
C
//////////////////////////////////////////////////
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// Bakalarska praca //
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// Meno studenta: Tomas Lukac //
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// Veduci BP: prof. Ing. Milos Drutarovsky CSc. //
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// Skola: KEMT FEI TUKE //
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// Datum poslednej upravy: 6.4.2020 //
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//////////////////////////////////////////////////
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wolfssl/ssl.h>
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#include <wolfssl/certs_test.h>
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#include <wolfssl/wolfcrypt/types.h>
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#ifdef _WIN32
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#include <Windows.h>
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#include <io.h>
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#include <fcntl.h>
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#define O_NOCTTY 0x8000
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#define O_NDELAY 0x4000
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#else
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#include <unistd.h>
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#endif
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#include "../kniznica/kryptografia.h"
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#include "../kniznica/komunikacia.h"
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#include "../kniznica/rs232.h"
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#define RSA_VELKOST 2048
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#define ECC_VELKOST 32
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#define RSA_EXPONENT 65537
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//cesty ku suborom
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#define RSA_KLUC "../certifikaty/server/server_rsa.key"
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#define RSA_CERTIFIKAT "../certifikaty/server/server_rsa.pem"
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#define ECC_KLUC "../certifikaty/server/server_ecc.key"
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#define ECC_CERTIFIKAT "../certifikaty/server/server_ecc.pem"
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#define VYGENEROVANY_KLUC "../certifikaty/server/vygenerovany_kluc.key"
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#define VYGENEROVANY_CERTIFIKAT "../certifikaty/server/vygenerovany_certifikat.pem"
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#define KOMUNIKACNY_SUBOR "server.txt"
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int rs232_prijat;
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int cislo_rozhrania = 0;
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int aktualne_data = 0;
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int rs232_citanie(WOLFSSL *ssl, char *buf, int sz, void *ctx)
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{
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int uspech = 0;
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//ziskanie dat zo serioveho rozhrania
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if(aktualne_data == 0)
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{
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FILE* f = fopen(KOMUNIKACNY_SUBOR, "ab");
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int nacitane_data = 0;
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int prebieha_nacitanie = 0;
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unsigned char znak;
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//kontrolne vzory, ktore jednoznacne identifikuju zaciatok a koniec spravy
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unsigned char zaciatok_spravy[] = {0xAA, 0xAA, 0xAA, 0xAA};
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int zaciatok_spravy_pozicia = 0; //aktualna pozicia v kontrolnom vzore
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unsigned char koniec_spravy[] = {0xBB, 0xBB, 0xBB, 0xBB};
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int koniec_spravy_pozicia = 0; //aktualna pozicia v kontrolnom vzore
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while(1)
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{
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uspech = RS232_PollComport(cislo_rozhrania, &znak, 1);
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if(uspech > 0)
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{
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//ak bol najdeny koniec kontrolneho vzoru, tak je zapnuta znacka,
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//ktora urcuje ze prebieha nacitavanie spravy
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if((znak == zaciatok_spravy[zaciatok_spravy_pozicia]) && (zaciatok_spravy_pozicia <= 2))
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{
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zaciatok_spravy_pozicia++;
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}
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else if((znak == zaciatok_spravy[zaciatok_spravy_pozicia]) && (zaciatok_spravy_pozicia > 2))
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{
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prebieha_nacitanie = 1;
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zaciatok_spravy_pozicia = 0;
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}
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else if((prebieha_nacitanie) && (znak == koniec_spravy[koniec_spravy_pozicia]) && (koniec_spravy_pozicia <= 2))
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{
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koniec_spravy_pozicia++;
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}
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//ak bol najdeny koniec kontrolneho vzoru, tak je vypnuta znacka,
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//ktora urcuje ze prebieha nacitanie spravy
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else if((prebieha_nacitanie) && (znak == koniec_spravy[koniec_spravy_pozicia]) && (koniec_spravy_pozicia > 2))
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{
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prebieha_nacitanie = 0;
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break;
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}
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else
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{
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if(prebieha_nacitanie)
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{
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fwrite((char*)&znak, 1, uspech, f);
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nacitane_data += uspech;
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}
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}
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}
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}
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aktualne_data = nacitane_data;
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printf("Nacital som %d dat\n", nacitane_data);
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fclose(f);
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}
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//nacitanie dat zo suboru do buffera
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uspech = 0;
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while(uspech <= 0)
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uspech = read(rs232_prijat, buf, sz);
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aktualne_data -= uspech;
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return uspech;
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}
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int rs232_zapis(WOLFSSL *ssl, char *buf, int sz, void *ctx)
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{
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int uspech = 0;
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//kontrolne vzory, ktore jednoznacne identifikuju zaciatok a koniec spravy
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unsigned char zaciatok_spravy[] = {0xAA, 0xAA, 0xAA, 0xAA};
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unsigned char koniec_spravy[] = {0xBB, 0xBB, 0xBB, 0xBB};
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RS232_SendBuf(cislo_rozhrania, (unsigned char*)zaciatok_spravy, 4);
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uspech = RS232_SendBuf(cislo_rozhrania, (unsigned char*)buf, sz);
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RS232_SendBuf(cislo_rozhrania, (unsigned char*)koniec_spravy, 4);
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printf("Odoslal som %d %d\n", uspech, sz);
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return uspech;
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}
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int main(int argc, char const *argv[])
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{
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WOLFSSL *ssl;
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WOLFSSL_CTX *ctx = NULL;
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int rychlost = 9600;
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char rezim[]={'8','N','1', 0};
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int zadane_rozhranie = 0;
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int generovanie_certifikatu = 0;
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int nacitanie_zo_suboru = 0;
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nastavenia_aplikacie nastavenia;
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rs232_prijat = open(KOMUNIKACNY_SUBOR, O_RDWR | O_NOCTTY | O_NDELAY);
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int uspech;
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if((ctx = nastavit_ctx_server()) == NULL)
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{
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return -1;
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}
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else
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{
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for(int i = 0; i < argc; i++)
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{
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if( (!strcmp(argv[i], "-port")) )
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{
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zadane_rozhranie = 1;
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if((argv[i+1] == NULL))
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{
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printf("Nezadali ste cislo serioveho rozhrania\n");
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return -1;
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}
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else
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{
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cislo_rozhrania = atoi(argv[i+1]);
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if(RS232_OpenComport(cislo_rozhrania, rychlost, rezim, 1))
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{
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fprintf(stderr, "Nebolo mozne otvorit seriove rozhranie\n");
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return -1;
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}
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}
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}
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else if( (!strcmp(argv[i], "-n")) )
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{
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nacitanie_zo_suboru = 1;
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if(generovanie_certifikatu)
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{
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fprintf(stderr, "Nie je mozne zvolit obidve metody nacitania certifikatov naraz\n");
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return -1;
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}
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if((argv[i+1] == NULL) || (i == argc-1))
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{
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printf("Nezadali ste typ certifikatu ktory chcete nacitat zo suboru\n");
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return -1;
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}
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else if(!strcmp(argv[i+1], "rsa"))
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{
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wolfSSL_CTX_load_verify_locations(ctx, "../certifikaty/autorita/autorita_rsa.pem", NULL);
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if(nacitat_certifikaty(ctx, RSA_CERTIFIKAT, RSA_KLUC) == -1) return -1;
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wolfSSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, 0);
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}
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else if(!strcmp(argv[i+1], "ecc"))
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{
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printf("jo\n");
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wolfSSL_CTX_load_verify_locations(ctx, "../certifikaty/autorita/autorita_ecc.pem", NULL);
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if(nacitat_certifikaty(ctx, ECC_CERTIFIKAT, ECC_KLUC) == -1) return -1;
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wolfSSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, 0);
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}
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else
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{
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printf("Zadali ste nespravny typ certifikatu\n");
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return -1;
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}
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}
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else if( (!strcmp(argv[i], "-g")) )
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{
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generovanie_certifikatu = 1;
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if(nacitanie_zo_suboru)
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{
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fprintf(stderr, "Nie je mozne zvolit obidve metody nacitania certifikatov naraz\n");
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return -1;
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}
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if((argv[i+1] == NULL) || (i == argc-1))
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{
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printf("Nezadali ste typ certifikatu ktory chcete vygenerovat\n");
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return -1;
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}
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else if(!strcmp(argv[i+1], "rsa"))
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{
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wolfSSL_CTX_load_verify_locations(ctx, "../certifikaty/autorita/autorita_rsa.pem", NULL);
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if(generovat_rsa_certifikat(RSA_VELKOST, RSA_EXPONENT, CTC_SHA256wRSA, "SR", "Kosice", "local.dev", "server@server.sk") == -1) return -1;
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if(nacitat_certifikaty(ctx, VYGENEROVANY_CERTIFIKAT, VYGENEROVANY_KLUC) == -1) return -1;
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}
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else if(!strcmp(argv[i+1], "ecc"))
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{
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wolfSSL_CTX_load_verify_locations(ctx, "../certifikaty/autorita/autorita_ecc.pem", NULL);
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if(generovat_ecc_certifikat(ECC_VELKOST, ECC_SECP256R1, CTC_SHAwECDSA, "SR", "Kosice", "local.dev", "server@server.sk") == -1) return -1;
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if(nacitat_certifikaty(ctx, VYGENEROVANY_CERTIFIKAT, VYGENEROVANY_KLUC) == -1) return -1;
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}
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else
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{
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printf("Zadali ste nespravny typ certifikatu\n");
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return -1;
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}
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}
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}
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}
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if(!zadane_rozhranie)
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{
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fprintf(stderr, "Nebol urcene seriove rozhranie\n");
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return -1;
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}
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else if(!generovanie_certifikatu && !nacitanie_zo_suboru)
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{
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fprintf(stderr, "Nebola zvolena metoda nacitania certifikatov\n");
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printf("Zadajde prepinac -g (generovanie), alebo -n (nacitanie_zo_suboru) s parametrom rsa alebo ecc\n");
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return -1;
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}
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//nastav_sifry(ctx, "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256");
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//wolfSSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, 0);
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wolfSSL_SetIOSend(ctx, rs232_zapis);
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wolfSSL_SetIORecv(ctx, rs232_citanie);
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while(1)
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{
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printf("------------\n");
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if ((ssl = wolfSSL_new(ctx)) == NULL)
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{
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printf("Nepodarilo sa vytvorit ssl relaciu\n");
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wolfSSL_CTX_free(ctx);
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return -1;
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}
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wolfSSL_set_fd(ssl, rs232_prijat);
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wolfSSL_set_using_nonblock(ssl, rs232_prijat);
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uspech = wolfSSL_accept(ssl);
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if(uspech != SSL_SUCCESS)
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{
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char* popis_chyby = calloc(100, sizeof(char));
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int chyba = wolfSSL_get_error(ssl, 0);
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wolfSSL_ERR_error_string(chyba, popis_chyby);
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fprintf(stderr, "Nastala chyba v spojeni.\nCislo chyby: %d\nDovod chyby: %s\n", chyba, popis_chyby);
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printf("Skontrolujte certifikaty.\n");
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return -1;
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}
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zobraz_sifru(ssl);
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zobraz_certifikat(ssl);
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nastav_funkciu(&nastavenia, funkcia_BLAKE2B);
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prijat_subor(ssl, ctx, &nastavenia);
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}
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RS232_CloseComport(cislo_rozhrania);
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close(rs232_prijat);
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close(open(KOMUNIKACNY_SUBOR, O_RDWR | O_NOCTTY | O_NDELAY));
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return 0;
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}
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