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ota.c
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/* (c) 2018-2020 HomeAccessoryKid */
#include <stdlib.h> //for UDPLGP
#include <stdio.h>
#include <string.h>
#include <espressif/esp_common.h>
#include <lwip/sockets.h>
#include <lwip/api.h>
#include <esp8266.h>
#include <wolfssl/ssl.h>
#include <wolfssl/wolfcrypt/types.h> // needed by wolfSSL_check_domain_name()
#include <wolfssl/wolfcrypt/logging.h>
#include <wolfssl/wolfcrypt/sha512.h>
#include <wolfssl/wolfcrypt/ecc.h>
#include <ota.h>
#include <sntp.h>
//#include <time.h> //included in sntp.h
#include <spiflash.h>
#include <sysparam.h>
#include <rboot-api.h>
#include <udplogger.h>
static int verify = 1;
static byte file_first_byte[]={0xff};
ecc_key prvecckey;
ecc_key pubecckey;
WOLFSSL_CTX* ctx;
#ifdef DEBUG_WOLFSSL
void MyLoggingCallback(const int logLevel, const char* const logMessage) {
/*custom logging function*/
UDPLGP("loglevel: %d - %s\n",logLevel, logMessage);
}
#endif
bool userbeta=0;
bool otabeta=0;
char *ota_strstr(const char *full_string, const char *search) { //lowercase version of strstr()
char *lc_string = strdup(full_string);
unsigned char *ch = (unsigned char *) lc_string;
while(*ch) {
*ch = tolower(*ch);
ch++;
}
const char *found = strstr(lc_string, search);
free(lc_string);
if(found == NULL) return NULL;
const int offset = (int) found - (int) lc_string;
return (char *) ((int) full_string + offset);
}
void ota_read_rtc() {
UDPLGP("--- ota_read_rtc\n");
int sector,count=0;
int count_step=3;
sysparam_status_t status;
char *value;
bool reset_wifi=0;
bool reset_otabeta=0;
bool factory_reset=0;
rboot_rtc_data rtc;
status = sysparam_init(SYSPARAMSECTOR, 0);
if (status == SYSPARAM_OK) {
status = sysparam_get_string("ota_count_step", &value);
if (status == SYSPARAM_OK) {
if (*value<0x34 && *value>0x30 && strlen(value)==1) count_step=*value-0x30;
free(value);
}
}
UDPLGP("--- count_step=%d\n",count_step);
if (rboot_get_rtc_data(&rtc)) count=rtc.temp_rom;
UDPLGP("--- count=%d\n",count);
if (count<5+count_step*1) { //standard ota-main or ota-boot behavior
value="--- standard ota";
}
else if (count<5+count_step*2) { //reset wifi parameters and clear LCM_beta
value="--- reset wifi and clear LCM_beta";
reset_wifi=1;
reset_otabeta=1;
}
else if (count<5+count_step*3) { //reset wifi parameters and set LCM_beta
value="--- reset wifi and set LCM_beta";
reset_wifi=1;
otabeta=1;
}
else {//factory reset
value="--- factory reset";
factory_reset=1;
}
UDPLGP("%s\n",value);
if (count>4) {
UDPLGP("IF this is NOT what you wanted, reset/power-down NOW!\n");
for (int i=9;i>-1;i--) {
vTaskDelay(1000/portTICK_PERIOD_MS);
UDPLGP("%s in %d s\n",value,i);
}
}
if (factory_reset) {
spiflash_erase_sector(SYSPARAMSECTOR); spiflash_erase_sector(SYSPARAMSECTOR+SECTORSIZE);//sysparam reset
for (sector=0xfb000; sector< 0x100000; sector+=SECTORSIZE) spiflash_erase_sector(sector);//Espressif area
#ifndef OTABOOT
for(sector= 0x2000; sector<BOOT1SECTOR; sector+=SECTORSIZE) spiflash_erase_sector(sector);//user space
#endif
}
uint32_t base_addr;
uint32_t num_sectors;
status = sysparam_init(SYSPARAMSECTOR, 0);
if (status != SYSPARAM_OK) {
status = sysparam_create_area(SYSPARAMSECTOR, 2, true);
if (status == SYSPARAM_OK) {
status = sysparam_init(SYSPARAMSECTOR, 0);
}
} else {
sysparam_get_info(&base_addr, &num_sectors);
if (num_sectors!=2) {
status = sysparam_create_area(SYSPARAMSECTOR, 2, true);
if (status == SYSPARAM_OK) {
status = sysparam_init(SYSPARAMSECTOR, 0);
}
}
}
if (status != SYSPARAM_OK) {
printf("WARNING: LCM/OTA could not initialize sysparams (%d)!\n", status);
}
if (reset_wifi) {
sysparam_set_string("wifi_ssid","");
sysparam_set_string("wifi_password","");
sysparam_compact(); //to make a copy without the ssid/password (does not erase old region)
sysparam_compact(); //to make sure the information really gets wiped
struct sdk_station_config sta_config; //remove esp wifi client settings
memset(&sta_config, 0, sizeof(sta_config));
sdk_wifi_station_set_config(&sta_config); //This wipes out the info in sectors 0xfd000+
}
#ifdef OTABETA
otabeta=1; //using beta = pre-releases?
#endif
if (otabeta && !reset_otabeta) sysparam_set_bool("lcm_beta", 1);
if ( reset_otabeta) sysparam_set_data("lcm_beta", NULL,0,0);
}
void ota_active_sector() {
UDPLGP("--- ota_active_sector: ");
extern int active_cert_sector;
extern int backup_cert_sector;
// set active_cert_sector
// first byte of the sector is its state:
// 0xff backup being evaluated
// 0x30 active sector
// 0x00 deactivated
byte fourbyte[4];
active_cert_sector=HIGHERCERTSECTOR;
backup_cert_sector=LOWERCERTSECTOR;
if (!spiflash_read(active_cert_sector, (byte *)fourbyte, 4)) { //get first 4 active
UDPLGP("error reading flash\n");
} // if OTHER vvvvvv sector active
if (fourbyte[0]!=0x30 || fourbyte[1]!=0x76 || fourbyte[2]!=0x30 || fourbyte[3]!=0x10 ) {
active_cert_sector=LOWERCERTSECTOR;
backup_cert_sector=HIGHERCERTSECTOR;
if (!spiflash_read(active_cert_sector, (byte *)fourbyte, 4)) {
UDPLGP("error reading flash\n");
}
if (fourbyte[0]!=0x30 || fourbyte[1]!=0x76 || fourbyte[2]!=0x30 || fourbyte[3]!=0x10 ) {
#ifdef OTABOOT
#include "certs.h"
active_cert_sector=HIGHERCERTSECTOR;
backup_cert_sector=LOWERCERTSECTOR;
spiflash_erase_sector(active_cert_sector); //just in case
spiflash_write(active_cert_sector, certs_sector, certs_sector_len);
#else
active_cert_sector=0;
backup_cert_sector=0;
#endif
}
}
UDPLGP("0x%x\n",active_cert_sector);
}
int8_t led=16;
TaskHandle_t ledblinkHandle = NULL;
void led_blink_task(void *pvParameter) {
UDPLGP("--- led_blink_task");
if (led<6 || led>11) { //do not allow pins 6-11
UDPLGP(" blinking led pin %d\n",led);
gpio_enable(led, GPIO_OUTPUT);
while(1) {
gpio_write(led, 1); vTaskDelay(BLINKDELAY/portTICK_PERIOD_MS);
gpio_write(led, 0); vTaskDelay(BLINKDELAY/portTICK_PERIOD_MS);
}
} else {
UDPLGP(": invalid pin %d\n",led);
}
ledblinkHandle = NULL;
vTaskDelete(NULL);
}
void ota_init() {
UDPLGP("--- ota_init\n");
sysparam_get_bool("lcm_beta", &otabeta);
sysparam_get_bool("ota_beta", &userbeta);
UDPLGP("userbeta=\'%d\' otabeta=\'%d\'\n",userbeta,otabeta);
ip_addr_t target_ip;
int ret;
sysparam_status_t status;
uint8_t led_info=0;
status = sysparam_get_int8("led_pin", &led);
if (status == SYSPARAM_OK) {
if (led<0) {led_info=0x10; led=-led;}
led_info+=(led<16)?(0x40+(led&0x0f)):0;
if (led<16) xTaskCreate(led_blink_task, "ledblink", 256, NULL, 1, &ledblinkHandle);
}
//rboot setup
rboot_config conf;
conf=rboot_get_config();
UDPLGP("rboot_config.unused[1]=LEDinfo from 0x%02x to 0x%02x\n",conf.unused[1],led_info);
if (conf.count!=2 || conf.roms[0]!=BOOT0SECTOR || conf.roms[1]!=BOOT1SECTOR || conf.current_rom!=0 || conf.unused[1]!=led_info) {
conf.count =2; conf.roms[0] =BOOT0SECTOR; conf.roms[1] =BOOT1SECTOR; conf.current_rom =0; conf.unused[1] =led_info;
rboot_set_config(&conf);
}
//time support
const char *servers[] = {SNTP_SERVERS};
sntp_set_update_delay(24*60*60000); //SNTP will request an update every 24 hour
//const struct timezone tz = {1*60, 0}; //Set GMT+1 zone, daylight savings off
//sntp_initialize(&tz);
sntp_initialize(NULL);
sntp_set_servers(servers, sizeof(servers) / sizeof(char*)); //Servers must be configured right after initialization
#ifdef DEBUG_WOLFSSL
if (wolfSSL_SetLoggingCb(MyLoggingCallback)) UDPLGP("error setting debug callback\n");
#endif
wolfSSL_Init();
ctx = wolfSSL_CTX_new(wolfTLSv1_2_client_method());
if (!ctx) {
//error
}
ota_active_sector();
ota_set_verify(0);
UDPLGP("--- DNS: ");
ret = netconn_gethostbyname(HOST, &target_ip);
while(ret) {
UDPLGP("%d",ret);
vTaskDelay(200);
ret = netconn_gethostbyname(HOST, &target_ip);
}
UDPLGP("done!\n");
}
#ifdef OTABOOT
int ota_get_privkey() {
UDPLGP("--- ota_get_privkey\n");
byte buffer[PKEYSIZE]; //maybe 49 bytes would be enough
int ret;
unsigned int idx;
int length;
//load private key as produced by openssl
if (!spiflash_read(backup_cert_sector, (byte *)buffer, 24)) {
UDPLGP("error reading flash\n"); return -1;
}
if (buffer[0]!=0x30 || buffer[1]!=0x81) return -2; //not a valid keyformat
if (buffer[3]!=0x02 || buffer[4]!=0x01 || buffer[5]!=0x01) return -2; //not a valid keyformat
if (buffer[6]!=0x04) return -2; //not a valid keyformat
idx=7;
length=buffer[idx++]; //bitstring start
if (!spiflash_read(backup_cert_sector+idx, (byte *)buffer, length)) {
UDPLGP("error reading flash\n"); return -1;
}
for (idx=0;idx<length;idx++) printf(" %02x",buffer[idx]);
wc_ecc_init(&prvecckey);
ret=wc_ecc_import_private_key_ex(buffer, length, NULL, 0, &prvecckey,ECC_SECP384R1);
printf("\nret: %d\n",ret);
/*
*/
return ret;
}
#endif
int ota_get_pubkey(int sector) { //get the ecdsa key from the indicated sector, report filesize
UDPLGP("--- ota_get_pubkey\n");
byte buf[PKEYSIZE];
byte * buffer=buf;
int length,ret;
//load public key as produced by openssl
if (!spiflash_read(sector, (byte *)buffer, PKEYSIZE)) {
UDPLGP("error reading flash\n"); return -1;
}
//do not test the first byte since else the key-update routine will not be able to collect a key
if (buffer[ 1]!=0x76 || buffer[ 2]!=0x30 || buffer[ 3]!=0x10) return -2; //not a valid keyformat
if (buffer[20]!=0x03 || buffer[21]!=0x62 || buffer[22]!=0x00) return -2; //not a valid keyformat
length=97;
int idx; for (idx=0;idx<length;idx++) printf(" %02x",buffer[idx+23]);
wc_ecc_init(&pubecckey);
ret=wc_ecc_import_x963_ex(buffer+23,length,&pubecckey,ECC_SECP384R1);
printf("\n");
UDPLGP("ret: %d\n",ret);
if (!ret)return PKEYSIZE; else return ret;
}
#ifdef OTABOOT
int ota_verify_pubkey(void) { //check if public and private key are a pair
UDPLGP("--- ota_verify_pubkey\n");
byte hash[HASHSIZE];
WC_RNG rng;
wc_RNG_GenerateBlock(&rng, hash, HASHSIZE);
//int i; printf("hash: "); for (i=0;i<HASHSIZE;i++) printf("%02x ",hash[i]); printf("\n");
int answer;
unsigned int siglen=SIGNSIZE;
byte signature[SIGNSIZE];
wc_ecc_sign_hash(hash, HASHSIZE, signature, &siglen, &rng, &prvecckey);
wc_ecc_verify_hash(signature, siglen, hash, HASHSIZE, &answer, &pubecckey);
UDPLGP("key valid: %d\n",answer);
return answer-1;
}
#endif
void ota_hash(int start_sector, int filesize, byte * hash, byte first_byte) {
UDPLGP("--- ota_hash\n");
int bytes;
byte buffer[1024];
Sha384 sha;
wc_InitSha384(&sha);
//printf("bytes: ");
for (bytes=0;bytes<filesize-1024;bytes+=1024) {
//printf("%d ",bytes);
if (!spiflash_read(start_sector+bytes, (byte *)buffer, 1024)) {
UDPLGP("error reading flash\n"); break;
}
if (!bytes && first_byte!=0xff) buffer[0]=first_byte;
wc_Sha384Update(&sha, buffer, 1024);
}
//printf("%d\n",bytes);
if (!spiflash_read(start_sector+bytes, (byte *)buffer, filesize-bytes)) {
UDPLGP("error reading flash @ %d for %d bytes\n",start_sector+bytes,filesize-bytes);
}
if (!bytes && first_byte!=0xff) buffer[0]=first_byte;
//printf("filesize %d\n",filesize);
wc_Sha384Update(&sha, buffer, filesize-bytes);
wc_Sha384Final(&sha, hash);
}
#ifdef OTABOOT
void ota_sign(int start_sector, int filesize, signature_t* signature, char* file) {
UDPLGP("--- ota_sign\n");
unsigned int i,siglen=SIGNSIZE;
WC_RNG rng;
ota_hash(start_sector, filesize, signature->hash, 0xff); // 0xff=no special first byte action
wc_ecc_sign_hash(signature->hash, HASHSIZE, signature->sign, &siglen, &rng, &prvecckey);
printf("echo "); for (i=0;i<HASHSIZE;i++) printf("%02x ",signature->hash[i]); printf("> x.hex\n");
printf("echo %08x >>x.hex\n",filesize);
printf("echo "); for (i=0;i<siglen ;i++) printf("%02x ",signature->sign[i]); printf(">>x.hex\n");
printf("xxd -r -p x.hex > %s.sig\n",file); printf("rm x.hex\n");
}
#endif
int ota_compare(char* newv, char* oldv) { //(if equal,0) (if newer,1) (if pre-release or older,-1)
UDPLGP("--- ota_compare ");
printf("\n");
char* dot;
int valuen=0,valueo=0;
char news[MAXVERSIONLEN],olds[MAXVERSIONLEN];
char * new=news;
char * old=olds;
int result=0;
if (strcmp(newv,oldv)) { //https://semver.org/#spec-item-11
do {
if (strchr(newv,'-')) {result=-1;break;} //we cannot handle versions with pre-release suffix notation (yet)
//pre-release marker in github serves to identify those
strncpy(new,newv,MAXVERSIONLEN-1);
strncpy(old,oldv,MAXVERSIONLEN-1);
if ((dot=strchr(new,'.'))) {dot[0]=0; valuen=atoi(new); new=dot+1;}
if ((dot=strchr(old,'.'))) {dot[0]=0; valueo=atoi(old); old=dot+1;}
printf("%d-%d,%s-%s\n",valuen,valueo,new,old);
if (valuen>valueo) {result= 1;break;}
if (valuen<valueo) {result=-1;break;}
valuen=valueo=0;
if ((dot=strchr(new,'.'))) {dot[0]=0; valuen=atoi(new); new=dot+1;}
if ((dot=strchr(old,'.'))) {dot[0]=0; valueo=atoi(old); old=dot+1;}
printf("%d-%d,%s-%s\n",valuen,valueo,new,old);
if (valuen>valueo) {result= 1;break;}
if (valuen<valueo) {result=-1;break;}
valuen=atoi(new);
valueo=atoi(old);
printf("%d-%d\n",valuen,valueo);
if (valuen>valueo) {result= 1;break;}
if (valuen<valueo) {result=-1;break;}
} while(0);
} //they are equal
UDPLGP("%s with %s=%d\n",newv,oldv,result);
return result;
}
int local_port=0;
static int ota_connect(char* host, int port, int *socket, WOLFSSL** ssl) {
UDPLGP("--- ota_connect LocalPort=");
int ret;
ip_addr_t target_ip;
struct sockaddr_in sock_addr;
unsigned char initial_port[2];
WC_RNG rng;
if (!local_port) {
wc_RNG_GenerateBlock(&rng, initial_port, 2);
local_port=(256*initial_port[0]+initial_port[1])|0xc000;
}
UDPLGP("%04x DNS",local_port);
ret = netconn_gethostbyname(host, &target_ip);
while(ret) {
printf("%d",ret);
vTaskDelay(200);
ret = netconn_gethostbyname(host, &target_ip);
}
UDPLGP(" IP:%d.%d.%d.%d ", (unsigned char)((target_ip.addr & 0x000000ff) >> 0),
(unsigned char)((target_ip.addr & 0x0000ff00) >> 8),
(unsigned char)((target_ip.addr & 0x00ff0000) >> 16),
(unsigned char)((target_ip.addr & 0xff000000) >> 24));
//printf("create socket ......");
*socket = socket(AF_INET, SOCK_STREAM, 0);
if (*socket < 0) {
UDPLGP(FAILED);
return -3;
}
UDPLGP("local..");
memset(&sock_addr, 0, sizeof(sock_addr));
sock_addr.sin_family = AF_INET;
sock_addr.sin_addr.s_addr = 0;
sock_addr.sin_port = htons(local_port++);
if (local_port==0x10000) local_port=0xc000;
ret = bind(*socket, (struct sockaddr*)&sock_addr, sizeof(sock_addr));
if (ret) {
UDPLGP(FAILED);
return -2;
}
UDPLGP("OK ");
UDPLGP("remote..");
memset(&sock_addr, 0, sizeof(sock_addr));
sock_addr.sin_family = AF_INET;
sock_addr.sin_addr.s_addr = target_ip.addr;
sock_addr.sin_port = htons(port);
ret = connect(*socket, (struct sockaddr*)&sock_addr, sizeof(sock_addr));
if (ret) {
UDPLGP(FAILED);
return -2;
}
UDPLGP("OK ");
if (port==HTTPS_PORT) { //SSL mode, in emergency mode this is skipped
UDPLGP("SSL..");
*ssl = wolfSSL_new(ctx);
if (!*ssl) {
UDPLGP(FAILED);
return -2;
}
UDPLGP("OK ");
//wolfSSL_Debugging_ON();
wolfSSL_set_fd(*ssl, *socket);
UDPLGP("set_fd ");
if (verify) ret=wolfSSL_check_domain_name(*ssl, host);
//wolfSSL_Debugging_OFF();
UDPLGP("to %s port %d..", host, port);
ret = wolfSSL_connect(*ssl);
if (ret != SSL_SUCCESS) {
UDPLGP("failed, return [-0x%x]\n", -ret);
ret=wolfSSL_get_error(*ssl,ret);
UDPLGP("wolfSSL_send error = %d\n", ret);
return -1;
}
UDPLGP("OK\n");
} //end SSL mode
return 0;
}
int ota_load_user_app(char * *repo, char * *version, char * *file) {
UDPLGP("--- ota_load_user_app\n");
sysparam_status_t status;
char *value;
status = sysparam_get_string("ota_repo", &value);
if (status == SYSPARAM_OK) {
*repo=value;
} else return -1;
status = sysparam_get_string("ota_version", &value);
if (status == SYSPARAM_OK) {
*version=value;
} else {
*version=malloc(6);
strcpy(*version,"0.0.0");
}
status = sysparam_get_string("ota_file", &value);
if (status == SYSPARAM_OK) {
*file=value;
} else return -1;
UDPLGP("user_repo=\'%s\' user_version=\'%s\' user_file=\'%s\'\n",*repo,*version,*file);
return 0;
}
void ota_set_verify(int onoff) {
UDPLGP("--- ota_set_verify...");
int ret=0;
byte abyte[1];
if (onoff) {
UDPLGP("ON\n");
if (verify==0) {
verify= 1;
do {
if (!spiflash_read(active_cert_sector+PKEYSIZE+(ret++), (byte *)abyte, 1)) {
UDPLGP("error reading flash\n");
break;
}
} while (abyte[0]!=0xff); ret--;
UDPLGP("certs size: %d\n",ret);
byte *certs=malloc(ret);
spiflash_read(active_cert_sector+PKEYSIZE, (byte *)certs, ret);
ret=wolfSSL_CTX_load_verify_buffer(ctx, certs, ret, SSL_FILETYPE_PEM);
if ( ret != SSL_SUCCESS) {
UDPLGP("fail cert loading, return %d\n", ret);
}
free(certs);
time_t ts;
do {
ts = time(NULL);
if (ts == ((time_t)-1)) printf("ts=-1, ");
vTaskDelay(1);
} while (!(ts>1073741823)); //2^30-1 which is supposed to be like 2004
UDPLGP("TIME: %s", ctime(&ts)); //we need to have the clock right to check certificates
wolfSSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
}
} else {
UDPLGP("OFF\n");
if (verify==1) {
verify= 0;
wolfSSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, NULL);
}
}
}
void ota_copy_bootloader(int sector, int size, char * version) {
UDPLGP("--- ota_copy_bootloader\n");
byte buffer[SECTORSIZE];
byte fourbyte[4];
char versionbuff[MAXVERSIONLEN];
memset(versionbuff,0xff,MAXVERSIONLEN);
strcpy(versionbuff,version);
spiflash_read(sector, buffer, size);
spiflash_read(0, fourbyte, 4); //transfer the flash setting flags from previous boot sector...
buffer[2]=fourbyte[2]; buffer[3]=fourbyte[3];
spiflash_erase_sector(0);
spiflash_write(0, buffer, size);
//version is stored as a string in last MAXVERSIONLEN bytes of sector
spiflash_write(SECTORSIZE-MAXVERSIONLEN, (byte *)versionbuff, MAXVERSIONLEN);
//set last uint32 to zero of the config sector so rboot will reflash it
memset(versionbuff,0,4);
spiflash_write(2*SECTORSIZE-4, (byte *)versionbuff, 4);
}
char* ota_get_btl_version() {
UDPLGP("--- ota_get_btl_version\n");
char versionbuff[MAXVERSIONLEN];
char* version=NULL;
spiflash_read(SECTORSIZE-MAXVERSIONLEN, (byte *)versionbuff, MAXVERSIONLEN);
if (versionbuff[0]!=0xff) { //TODO: make this more error resistant
version=malloc(strlen(versionbuff));
strcpy(version,versionbuff);
} else {
version=malloc(6);
strcpy(version,"0.0.0");
}
UDPLGP("bootloader version:\"%s\"\n",version);
return version;
}
int ota_get_file_ex(char * repo, char * version, char * file, int sector, byte * buffer, int bufsz); //prototype needed
char* ota_get_version(char * repo) {
UDPLGP("--- ota_get_version\n");
char* version=NULL;
char prerelease[64];
int retc, ret=0;
int httpcode;
WOLFSSL* ssl;
int socket;
//host=begin(repo);
//mid =end(repo)+blabla+version
char* location;
char recv_buf[RECV_BUF_LEN];
int send_bytes; //= sizeof(send_data);
strcat(strcat(strcat(strcat(strcat(strcpy(recv_buf, \
REQUESTHEAD),repo),"/releases/latest"),REQUESTTAIL),HOST),CRLFCRLF);
send_bytes=strlen(recv_buf);
//printf("%s\n",recv_buf);
retc = ota_connect(HOST, HTTPS_PORT, &socket, &ssl); //release socket and ssl when ready
if (!retc) {
UDPLGP("%s",recv_buf);
ret = wolfSSL_write(ssl, recv_buf, send_bytes);
if (ret > 0) {
printf("sent OK\n");
//wolfSSL_shutdown(ssl); //by shutting down the connection before even reading, we reduce the payload to the minimum
ret = wolfSSL_peek(ssl, recv_buf, RECV_BUF_LEN - 1);
if (ret > 0) {
recv_buf[ret]=0; //error checking
//printf("%s\n",recv_buf);
location=ota_strstr(recv_buf,"http/1.1 ");
// strchr(location,' ')[0]=0;
location+=9; //flush "HTTP/1.1 "
httpcode=atoi(location);
UDPLGP("HTTP returns %d for ",httpcode);
if (httpcode!=302) {
wolfSSL_free(ssl);
lwip_close(socket);
return "404";
}
// recv_buf[strlen(recv_buf)]=' '; //for further headers
location=ota_strstr(recv_buf,"\nlocation:");
strchr(location,'\r')[0]=0;
//printf("%s\n",location);
location=ota_strstr(location,"tag/");
if (location[4]=='v' || location[4]=='V') location++;
version=malloc(strlen(location+4));
strcpy(version,location+4);
printf("%s@version:\"%s\" according to latest release\n",repo,version);
} else {
UDPLGP("failed, return [-0x%x]\n", -ret);
ret=wolfSSL_get_error(ssl,ret);
UDPLGP("wolfSSL_send error = %d\n", ret);
}
} else {
UDPLGP("failed, return [-0x%x]\n", -ret);
ret=wolfSSL_get_error(ssl,ret);
UDPLGP("wolfSSL_send error = %d\n", ret);
}
}
switch (retc) {
case 0:
case -1:
wolfSSL_free(ssl);
case -2:
lwip_close(socket);
case -3:
default:
;
}
// if (retc) return retc;
// if (ret <= 0) return ret;
//TODO: maybe add more error return messages... like version "99999.99.99"
//find latest-pre-release if joined beta program
bool OTAorBTL=!(strcmp(OTAREPO,repo)&&strcmp(BTLREPO,repo));
if ( (userbeta && !OTAorBTL) || (otabeta && OTAorBTL)) {
prerelease[63]=0;
ret=ota_get_file_ex(repo,version,"latest-pre-release",0,(byte *)prerelease,63);
if (ret>0) {
prerelease[ret]=0;
free(version);
version=malloc(strlen(prerelease)+1);
strcpy(version,prerelease);
}
}
if (ota_boot() && ota_compare(version,OTAVERSION)<0) { //this acts when setting up a new version
free(version);
version=malloc(strlen(OTAVERSION)+1);
strcpy(version,OTAVERSION);
}
UDPLGP("%s@version:\"%s\"\n",repo,version);
return version;
}
int ota_get_file_ex(char * repo, char * version, char * file, int sector, byte * buffer, int bufsz) { //number of bytes
UDPLGP("--- ota_get_file_ex\n");
int retc, ret=0, slash;
WOLFSSL* ssl;
int socket;
//host=begin(repo);
//mid =end(repo)+blabla+version
char* location=NULL;
char recv_buf[RECV_BUF_LEN];
int recv_bytes = 0;
int send_bytes; //= sizeof(send_data);
int length=1;
int clength=0;
int left;
int collected=0;
int writespace=0;
int header;
bool emergency=(strcmp(version,EMERGENCY))?0:1;
int port=(emergency)?HTTP_PORT:HTTPS_PORT;
if (sector==0 && buffer==NULL) return -5; //needs to be either a sector or a signature
if (!emergency) { //if not emergency, find the redirection done by GitHub
strcat(strcat(strcat(strcat(strcat(strcat(strcat(strcat(strcpy(recv_buf, \
REQUESTHEAD),repo),"/releases/download/"),version),"/"),file),REQUESTTAIL),HOST),CRLFCRLF);
send_bytes=strlen(recv_buf);
UDPLGP("%s",recv_buf);
retc = ota_connect(HOST, HTTPS_PORT, &socket, &ssl); //release socket and ssl when ready
if (!retc) {
ret = wolfSSL_write(ssl, recv_buf, send_bytes);
if (ret > 0) {
UDPLGP("sent OK\n");
//wolfSSL_shutdown(ssl); //by shutting down the connection before even reading, we reduce the payload to the minimum
ret = wolfSSL_peek(ssl, recv_buf, RECV_BUF_LEN - 1);
if (ret > 0) {
recv_buf[ret]=0; //error checking, e.g. not result=206
printf("%s\n",recv_buf);
location=ota_strstr(recv_buf,"http/1.1 ");
// strchr(location,' ')[0]=0;
location+=9; //flush "HTTP/1.1 "
slash=atoi(location);
UDPLGP("HTTP returns %d\n",slash);
if (slash!=302) {
wolfSSL_free(ssl);
lwip_close(socket);
return -1;
}
// recv_buf[strlen(recv_buf)]=' '; //for further headers
location=ota_strstr(recv_buf,"\nlocation:");
strchr(location,'\r')[0]=0;
if (location[10] == ' ') location++;
location+=18; //flush Location: https://
//printf("%s\n",location);
} else {
UDPLGP("failed, return [-0x%x]\n", -ret);
ret=wolfSSL_get_error(ssl,ret);
UDPLGP("wolfSSL_send error = %d\n", ret);
}
} else {
UDPLGP("failed, return [-0x%x]\n", -ret);
ret=wolfSSL_get_error(ssl,ret);
UDPLGP("wolfSSL_send error = %d\n", ret);
}
}
switch (retc) {
case 0:
case -1:
wolfSSL_free(ssl);
case -2:
lwip_close(socket);
case -3:
default:
;
}
if (retc) return retc;
if (ret <= 0) return ret;
} else { //emergency mode, repo is expected to have the format "not.github.com/somewhere/"
strcpy(recv_buf,repo);
location=recv_buf;
if (location[strlen(location)-1]!='/') strcat(location, "/");
strcat(location, file);
UDPLGP("emergency GET http://%s\n",location);
} //location now contains the url without https:// or http://
//process the Location
strcat(location, REQUESTTAIL);
slash=strchr(location,'/')-location;
location[slash]=0; //cut behind the hostname
char * host2=malloc(strlen(location));
strcpy(host2,location);
//printf("next host: %s\n",host2);
retc = ota_connect(host2, port, &socket, &ssl); //release socket and ssl when ready
strcat(strcat(location+slash+1,host2),RANGE); //append hostname and range to URI
location+=slash-4;
memcpy(location,REQUESTHEAD,5);
char * getlinestart=malloc(strlen(location));
strcpy(getlinestart,location);
//printf("request:\n%s\n",getlinestart);
//if (!retc) {
while (collected<length) {
sprintf(recv_buf,"%s%d-%d%s",getlinestart,collected,collected+4095,CRLFCRLF);
send_bytes=strlen(recv_buf);
//printf("request:\n%s\n",recv_buf);
printf("send request......");
if (emergency) ret = lwip_write(socket, recv_buf, send_bytes); else ret = wolfSSL_write(ssl, recv_buf, send_bytes);
recv_bytes=0;
if (ret > 0) {
printf("OK\n");
header=1;
memset(recv_buf,0,RECV_BUF_LEN);
//wolfSSL_Debugging_ON();
do {
if (emergency) ret = lwip_read(socket, recv_buf, RECV_BUF_LEN - 1); else ret = wolfSSL_read(ssl, recv_buf, RECV_BUF_LEN - 1);
if (ret > 0) {
if (header) {
//printf("%s\n-------- %d\n", recv_buf, ret);
//parse Content-Length: xxxx
location=ota_strstr(recv_buf,"\ncontent-length:");
strchr(location,'\r')[0]=0;
location+=16; //flush Content-Length://
//if (location[0] == ' ') location++; //flush a space, atoi would also do that
clength=atoi(location);
location[strlen(location)]='\r'; //in case the order changes
//parse Content-Range: bytes xxxx-yyyy/zzzz
location=ota_strstr(recv_buf,"\ncontent-range:");
strchr(location,'\r')[0]=0;
location+=15; //flush Content-Range://
location=ota_strstr(recv_buf,"bytes ");
location+=6; //flush Content-Range: bytes //
location=strstr(location,"/"); location++; //flush /
length=atoi(location);
location[strlen(location)]='\r'; //search the entire buffer again
location=strstr(recv_buf,CRLFCRLF)+4; //go to end of header
if ((left=ret-(location-recv_buf))) {
header=0; //we have body in the same IP packet as the header so we need to process it already
ret=left;
memmove(recv_buf,location,left); //move this payload to the head of the recv_buf
}
}
if (!header) {
recv_bytes += ret;
if (sector) { //write to flash
if (writespace<ret) {
UDPLGP("erasing@0x%05x>", sector+collected);
if (!spiflash_erase_sector(sector+collected)) return -6; //erase error
writespace+=SECTORSIZE;
}
if (collected) {
if (!spiflash_write(sector+collected, (byte *)recv_buf, ret )) return -7; //write error
} else { //at the very beginning, do not write the first byte yet but store it for later
file_first_byte[0]=(byte)recv_buf[0];
if (!spiflash_write(sector+1 , (byte *)recv_buf+1, ret-1)) return -7; //write error
}
writespace-=ret;
} else { //buffer
if (ret>bufsz) return -8; //too big
memcpy(buffer,recv_buf,ret);
}
collected+=ret;
int i;
for (i=0;i<3;i++) printf("%02x", recv_buf[i]);
printf("...");
for (i=3;i>0;i--) printf("%02x", recv_buf[ret-i]);
printf(" ");
}
} else {
if (ret && !emergency) {ret=wolfSSL_get_error(ssl,ret); UDPLGP("error %d\n",ret);}
if (!ret && collected<length) retc = ota_connect(host2, port, &socket, &ssl); //memory leak?
break;
}
header=0; //if header and body are separted
} while(recv_bytes<clength);
printf(" so far collected %d bytes\n", collected);
UDPLOG(" collected %d bytes\r", collected);
} else {
printf("failed, return [-0x%x]\n", -ret);
if (!emergency) {
ret=wolfSSL_get_error(ssl,ret);
printf("wolfSSL_send error = %d\n", ret);
}
if (ret==-308) {
retc = ota_connect(host2, port, &socket, &ssl); //dangerous for eternal connecting? memory leak?
} else {
break; //give up?
}
}
}
UDPLOG("\n");
switch (retc) {
case 0:
case -1:
if (!emergency) {
wolfSSL_free(ssl);
}
case -2:
lwip_close(socket);
case -3:
default:
;
}
free(host2);
free(getlinestart);
return collected;
}
void ota_finalize_file(int sector) {
UDPLGP("--- ota_finalize_file\n");
if (!spiflash_write(sector, file_first_byte, 1)) UDPLGP("error writing flash\n");
//TODO: add verification and retry and if wrong return status...
}
int ota_get_file(char * repo, char * version, char * file, int sector) { //number of bytes
UDPLGP("--- ota_get_file\n");
return ota_get_file_ex(repo,version,file,sector,NULL,0);
}
int ota_get_hash(char * repo, char * version, char * file, signature_t* signature) {
UDPLGP("--- ota_get_hash\n");
int ret;
byte buffer[HASHSIZE+4+SIGNSIZE];
char * signame=malloc(strlen(file)+5);
strcpy(signame,file);
strcat(signame,".sig");
memset(signature->hash,0,HASHSIZE);
memset(signature->sign,0,SIGNSIZE);
ret=ota_get_file_ex(repo,version,signame,0,buffer,HASHSIZE+4+SIGNSIZE);
free(signame);
if (ret<0) return ret;
memcpy(signature->hash,buffer,HASHSIZE);
signature->size=((buffer[HASHSIZE]*256 + buffer[HASHSIZE+1])*256 + buffer[HASHSIZE+2])*256 + buffer[HASHSIZE+3];
if (ret>HASHSIZE+4) memcpy(signature->sign,buffer+HASHSIZE+4,SIGNSIZE);
return 0;
}
int ota_verify_hash(int address, signature_t* signature) {
UDPLGP("--- ota_verify_hash\n");
byte hash[HASHSIZE];
ota_hash(address, signature->size, hash, file_first_byte[0]);
// int i;
// printf("signhash:"); for (i=0;i<HASHSIZE;i++) printf(" %02x",signature->hash[i]); printf("\n");
// printf("calchash:"); for (i=0;i<HASHSIZE;i++) printf(" %02x", hash[i]); printf("\n");
if (memcmp(hash,signature->hash,HASHSIZE)) ota_hash(address, signature->size, hash, 0xff);
return memcmp(hash,signature->hash,HASHSIZE);
}
int ota_verify_signature(signature_t* signature) {
UDPLGP("--- ota_verify_signature\n");
int answer=0;
wc_ecc_verify_hash(signature->sign, SIGNSIZE, signature->hash, HASHSIZE, &answer, &pubecckey);
UDPLGP("signature valid: %d\n",answer);
return answer-1;
}
void ota_kill_file(int sector) {
UDPLGP("--- ota_kill_file\n");
byte zero[]={0x00};
if (!spiflash_write(sector, zero, 1)) UDPLGP("error writing flash\n");
}
void ota_swap_cert_sector() {
UDPLGP("--- ota_swap_cert_sector\n");
ota_kill_file(active_cert_sector);