void show_alloc_mem(void)
{
size_t total_size;
total_size = 0;
total_size += show_memory(g_memory.tiny, "TINY : ");
total_size += show_memory(g_memory.small, "SMALL : ");
total_size += show_memory(g_memory.large, "LARGE : ");
ft_putstr("Total : ");
ft_putnbr_base(total_size, 10);
ft_putstr(" octets\n");
}
int process_tcp_pkt2(char *pkt, int pkt_len, int *last_recv_pkt_num) {
int ret;
RC4_crypt(pkt, pkt_len, &rc4_save, 0);
memcpy(last_recv_pkt_num,pkt+1,2);
*last_recv_pkt_num=bswap16(*last_recv_pkt_num);
(*last_recv_pkt_num)++;
*last_recv_pkt_num=bswap16(*last_recv_pkt_num);
show_memory(pkt,pkt_len,"result2:");
// supernode check
// if yet 06 0x21 blob, this is supernode reply
ret=main_unpack_test(pkt, pkt_len, 0x06, 0x21) ;
if (ret==0){
//printf("skype client, dumping nodes\n");
//main_unpack_saveip(pkt,pkt_len);
return -1;
};
return 0;
};
int process_tcp_pkt1(char *pkt, int pkt_len, u32 *remote_tcp_rnd) {
u32 newrnd;
u32 iv;
if (pkt_len<0x0E) {
//printf("too short packet\n");
//printf("not skype\n");
return -1;
};
memcpy(&newrnd,pkt,4);
iv = bswap32(newrnd);
Skype_RC4_Expand_IV (&rc4_save, iv, 1);
RC4_crypt (pkt+4, 10, &rc4_save, 1);
if (pkt_len > 0x0E) {
RC4_crypt (pkt+14, pkt_len-14, &rc4_save, 0);
};
show_memory(pkt,pkt_len,"result1:");
if (strncmp(pkt+4+2,"\x00\x00\x00\x01\x00\x00\x00\x03",8)!=0) {
//printf("first answer wrong\n");
//printf("not skype\n");
return -1;
};
*remote_tcp_rnd=newrnd;
return 0;
};
static size_t
show_section(struct mca_section_header *sh)
{
static uuid_t uuid_cpu = MCA_UUID_CPU;
static uuid_t uuid_memory = MCA_UUID_MEMORY;
static uuid_t uuid_sel = MCA_UUID_SEL;
static uuid_t uuid_pci_bus = MCA_UUID_PCI_BUS;
static uuid_t uuid_smbios = MCA_UUID_SMBIOS;
static uuid_t uuid_pci_dev = MCA_UUID_PCI_DEV;
static uuid_t uuid_generic = MCA_UUID_GENERIC;
printf(" <section>\n");
show_value(4, "uuid", "%s", uuid(&sh->sh_uuid));
show_value(4, "revision", "%d.%d", BCD(sh->sh_major),
BCD(sh->sh_minor));
if (uuid_equal(&sh->sh_uuid, &uuid_cpu, NULL))
show_cpu((void*)(sh + 1));
else if (uuid_equal(&sh->sh_uuid, &uuid_memory, NULL))
show_memory((void*)(sh + 1));
else if (uuid_equal(&sh->sh_uuid, &uuid_sel, NULL))
show_sel();
else if (uuid_equal(&sh->sh_uuid, &uuid_pci_bus, NULL))
show_pci_bus((void*)(sh + 1));
else if (uuid_equal(&sh->sh_uuid, &uuid_smbios, NULL))
show_smbios();
else if (uuid_equal(&sh->sh_uuid, &uuid_pci_dev, NULL))
show_pci_dev((void*)(sh + 1));
else if (uuid_equal(&sh->sh_uuid, &uuid_generic, NULL))
show_generic();
printf(" </section>\n");
return (sh->sh_length);
}
int process_tcp_pkt5(char *pkt, int pkt_len) {
RC4_crypt (pkt, pkt_len, &rc4_save, 0);
show_memory(pkt,pkt_len,"result:");
//process_pkt(pkt,pkt_len,1);
main_unpack(pkt,pkt_len);
return 0;
};
///////////////////////////////
//tcp second packet
////////////////////////////////
int make_tcp_pkt2(u16 seqnum, u32 rnd, char *pkt, int *pkt_len) {
int len;
u32 iv;
u8 result[0x1000];
int result_len;
//42394 - 0xA59A my iport
skype_thing mythings[] = {
{0, 0x01, 0x00000003, 0},
{1, 0x0D, 0xD6BA8CD9, 0x9205E2CD},
{0, 0x10, 0xA59A, 0},
};
int mythings_len=3;
u8 send_probe_pkt[]="\x30\xFF\xFF\x13\xF2\x01\xFF\xFF\x42\x44\x40\xFA\x3B\x4C\xE4\xAF\x94\xD9\x8C\xBA\xD6\xCD\xE2\x05\x92";
len=sizeof(send_probe_pkt)-1;
//main_unpack(send_probe_pkt,len);
result_len=main_pack(mythings, mythings_len, result, sizeof(result)-1 );
//show_memory(result,nlen,"packed42:");
//main_unpack(result,nlen);
memcpy(send_probe_pkt+8,result,result_len);
show_memory(send_probe_pkt,len,"send pkt2:");
seqnum=bswap16(seqnum);
memcpy(send_probe_pkt+1,(char *)&seqnum,2);
seqnum=bswap16(seqnum);
seqnum=bswap16(seqnum-1);
memcpy(send_probe_pkt+6,(char *)&seqnum,2);
seqnum=bswap16(seqnum-1);
iv = rnd;
Skype_RC4_Expand_IV (&rc4, iv, 1);
RC4_crypt (send_probe_pkt, len, &rc4, 0);
memcpy(pkt,send_probe_pkt,len);
*pkt_len=len;
return 0;
};
int process_udp_push_pkt1(char *globalptr, char *pkt,int pkt_len,char *ourip,char *destip) {
RC4_context rc4;
u32 newrnd;
u32 targetip;
u32 publicip;
u32 iv3[3];
u32 iv;
int header_len;
int ret;
struct global_s *global;
global=(struct global_s *)globalptr;
//show_memory(pkt,pkt_len,"result len:");
targetip=inet_addr(destip);
publicip=inet_addr(ourip);
newrnd = bswap32(dword(pkt+3));
iv3[2] = bswap16(word(pkt));
iv3[1] = bswap32(publicip);
iv3[0] = bswap32(targetip);
iv = crc32(iv3,3) ^ newrnd;
Skype_RC4_Expand_IV (&rc4, iv, 1);
header_len=11;
//show_memory(pkt+header_len,pkt_len-header_len,"bef rc4:");
RC4_crypt (pkt+header_len, pkt_len-header_len, &rc4, 0);
if (DEBUG_LEVEL>=100) show_memory(pkt+header_len,pkt_len-header_len,"aft rc4:");
//main_unpack(pkt+header_len,pkt_len-header_len);
ret=memcmp(pkt+header_len+1,"\xB3\x04",2);
if (ret!=0){
if (DEBUG_LEVEL>=100) printf("push reply negative\n");
return -1;
};
if (DEBUG_LEVEL>=100) printf("push reply ok\n");
return 1;
};
///////////////////////////////
//tcp third packet
////////////////////////////////
int make_tcp_pkt3(u16 seqnum, u32 rnd, char *pkt, int *pkt_len) {
int len;
u8 result[0x1000];
int result_len;
skype_thing mythings[] = {
{0, 0x04, 0x10, 0},
{0, 0x05, 0x06, 0},
};
int mythings_len=2;
//u8 send_probe_pkt[]="\x16\xFF\xFF\x06\x82\x03\xFF\xFF\x42\x33\x48\x93";
u8 send_probe_pkt[]="\x14\xFF\xFF\x06\x32\xFF\xFF\x42\x85\x14\xC9";
len=sizeof(send_probe_pkt)-1;
//main_unpack(send_probe_pkt,len);
result_len=main_pack(mythings, mythings_len, result, sizeof(result)-1 );
//show_memory(result,result_len,"packed42:");
//main_unpack(result,result_len);
memcpy(send_probe_pkt+7,result,result_len);
show_memory(send_probe_pkt,len,"send pkt3:");
//seq
seqnum=bswap16(seqnum);
memcpy(send_probe_pkt+1,(char *)&seqnum,2);
seqnum=bswap16(seqnum);
seqnum--;
seqnum=bswap16(seqnum);
memcpy(send_probe_pkt+5,(char *)&seqnum,2);
seqnum=bswap16(seqnum);
len=0;
memcpy(pkt+len,send_probe_pkt,sizeof(send_probe_pkt)-1);
len+=sizeof(send_probe_pkt)-1;
RC4_crypt (pkt, len, &rc4, 0);
*pkt_len=len;
return 0;
};
int process_tcp_pkt3(char *pkt, int pkt_len, int *last_recv_pkt_num) {
RC4_crypt (pkt, pkt_len, &rc4_save, 0);
memcpy(last_recv_pkt_num,pkt+2,2);
/*
*last_recv_pkt_num=bswap16(*last_recv_pkt_num);
(*last_recv_pkt_num)++;
*last_recv_pkt_num=bswap16(*last_recv_pkt_num);
*/
show_memory(pkt,pkt_len,"result3:");
main_unpack(pkt,pkt_len);
main_unpack_saveip(pkt,pkt_len);
return 0;
};
int main() {
unsigned char membuf[0x1000];
int header_len;
int tmplen;
//memcpy(membuf, "\xA1\x85\x02", 3);
memcpy(membuf, "\x93\x8D\x02", 3);
memcpy(membuf, "\xC9\x6E", 2);
show_memory(membuf, 2, "Input:");
// pass 1-3 bytes of header
header_len = 0;
tmplen = get_packet_size2(membuf, 4, &header_len);
//tmplen = tmplen-1;
printf("7bit decoded len: %d\n", tmplen);
};
int parse_cmd_lines(_MIPD_ int argc, char* argv[], char *globalptr) {
int len;
u32 secret_p[17], secret_q[17];
char public_key[0x81];
char secret_key[0x81];
u8 userhex[0x1000];
char str_skypename[0x1000];
char user_cred[0x101];
char str_remote_skype[1024];
char tmpdestip[1024];
char tmpdestport[1024];
char line1[0x1000];
char line2[0x1000];
int retcode;
int fd;
struct global_s *global;
global=(struct global_s *)globalptr;
memset(public_key,0,sizeof(public_key));
memset(secret_key,0,sizeof(secret_key));
if (argc!=2){
printf("usege: skydirect <our public ip>\n");
return -1;
};
strncpy(global->our_public_ip,argv[1],0x100);
fd=open("a_cred.txt",O_RDONLY);
len=read(fd,&line1,0x1000);
close(fd);
if (len<=0){
if(DEBUG_LEVEL>=100) printf("file open error\n");
return -1;
};
if (len>=0x1000){
if(DEBUG_LEVEL>=100) printf("file too big\n");
return -1;
};
line1[len]=0;
parse_input_line(line1, secret_p, secret_q, (char*)&str_skypename, (char*)&user_cred);
if(DEBUG_LEVEL>=100) printf("skypename=%s\n",str_skypename);
show_memory(user_cred,0x100,"cred:");
memcpy(global->CREDENTIALS,"\x00\x00\x00\x01",4);
memcpy(global->CREDENTIALS+4,user_cred,0x100);
global->CREDENTIALS_LEN=0x104;
//
fd=open("a_sendto.txt",O_RDONLY);
len=read(fd,&line2,0x1000);
close(fd);
if (len<=0){
if(DEBUG_LEVEL>=100) printf("file open error\n");
return -1;
};
if (len>=0x1000){
if(DEBUG_LEVEL>=100) printf("file too big\n");
return -1;
};
line2[len]=0;
retcode=parse_input_line2(line2, (u8 *)&userhex, (char *)&str_remote_skype, (char *)&tmpdestip, (char *)&tmpdestport);
if(DEBUG_LEVEL>=100) show_memory(userhex,0x08,"userhex id:");
memcpy(global->USERHEX,userhex,0x08);
if (retcode==-1){
printf("load parsing, at sendto file parsing error\n");
return -1;
};
if(DEBUG_LEVEL>=100) printf("remote_skypename=%s\n",str_remote_skype);
if(DEBUG_LEVEL>=100) printf("destip=%s\n",tmpdestip);
if(DEBUG_LEVEL>=100) printf("destport=%s\n",tmpdestport);
strncpy(global->user_snodeip,tmpdestip,1024);
global->user_snodeport=atoi(tmpdestport);
restore_user_keypair(_MIPP_ secret_p, secret_q, public_key, secret_key);
memcpy(global->xoteg_pub,public_key,0x80);
memcpy(global->xoteg_sec,secret_key,0x80);
show_memory(global->xoteg_pub,0x80,"xoteg_pubkey:");
show_memory(global->xoteg_sec,0x80,"xoteg_seckey:");
show_memory(global->CREDENTIALS,0x104,"CREDENTIALS:");
strcpy(global->REMOTE_NAME,str_remote_skype);
strcat(global->CHAT_STRING,"#");
strcat(global->CHAT_STRING,str_skypename);
strcat(global->CHAT_STRING,"/$");
strcat(global->CHAT_STRING,global->REMOTE_NAME);
strcat(global->CHAT_STRING,";");
strcat(global->CHAT_STRING,global->CHAT_RND_ID);
strcat(global->CHAT_PEERS,global->REMOTE_NAME);
strcat(global->CHAT_PEERS," ");
strcat(global->CHAT_PEERS,str_skypename);
if(DEBUG_LEVEL>=100) printf("CHAT_STRING: %s\n",global->CHAT_STRING);
if(DEBUG_LEVEL>=100) printf("REMOTE_NAME: %s\n",global->REMOTE_NAME);
if(DEBUG_LEVEL>=100) printf("CHAT_PEERS: %s\n",global->CHAT_PEERS);
fd=open("a_msg.txt",O_RDONLY);
len=read(fd,&global->MSG_TEXT,0x1000);
close(fd);
if (len<=0){
if(DEBUG_LEVEL>=100) printf("file open error\n");
return -1;
};
if (len>=0x1000){
if(DEBUG_LEVEL>=100) printf("file too big\n");
return -1;
};
global->MSG_TEXT[len]=0;
if(DEBUG_LEVEL>=100) printf("\nMSG_TEXT: %s\n",global->MSG_TEXT);
return 1;
}
///////////////////////////////
//tcp third packet
////////////////////////////////
int make_tcp_pkt3(u16 seqnum, u32 rnd, int last_recv_pkt_num, int start_slot, char *pkt, int *pkt_len) {
int len;
u16 seqnum42;
u8 result[0x2000];
int result_len;
u8 bufheader[0x10];
int bufheader_len;
u8 pkt_tmp[0x2000];
int pkt_tmp_len;
u32 num_nodes_from_slot=0x0A;
skype_thing mythings[] = {
{0, 0, 0xFF, 0x00},
{0, 5, 0xFF, 0x00},
};
int mythings_len=2;
u8 send_pkt1[] = "\x07\x01\xFF\xFF";
// pkt1 confirm
len=0;
memcpy(send_pkt1+2,&last_recv_pkt_num,2);
memcpy(pkt+len,send_pkt1,sizeof(send_pkt1)-1);
len+=sizeof(send_pkt1)-1;
mythings[0].m=start_slot;
mythings[0].n=0;
mythings[1].m=num_nodes_from_slot;
mythings[1].n=0;
result_len=main_pack(mythings, mythings_len, result, sizeof(result)-1 );
// 42 header
seqnum42=seqnum+1;
bufheader_len=first_bytes_header2(seqnum42, bufheader, sizeof(bufheader)-1, result, result_len);
if (bufheader_len==-1){
return -1;
};
// 42 header and data
pkt_tmp_len=0;
memcpy(pkt_tmp+pkt_tmp_len,bufheader,bufheader_len);
pkt_tmp_len+=bufheader_len;
memcpy(pkt_tmp+pkt_tmp_len,result,result_len);
pkt_tmp_len+=result_len;
// pkt header
seqnum42=seqnum+2;
bufheader_len=first_bytes_size(seqnum42, bufheader, sizeof(bufheader)-1, pkt_tmp, pkt_tmp_len);
if (bufheader_len==-1){
return -1;
};
memcpy(pkt+len,bufheader,bufheader_len);
len+=bufheader_len;
memcpy(pkt+len,pkt_tmp,pkt_tmp_len);
len+=pkt_tmp_len;
show_memory(pkt,len,"send pkt3:");
RC4_crypt (pkt, len, &rc4, 0);
*pkt_len=len;
return 0;
};
////////////////////////
// udp push prepare //
////////////////////////
int make_udp_push_prepare(char *globalptr, u16 seqnum, char *send_pkt, int *s_len) {
int ret=0;
u8 result[0x1000];
int result_len;
u8 header[0x100];
int header_len=5;
int send_len;
//u8 req_user[]="xoteg_iam";
// xot_iam card
//u8 req_ipblock[]="\x95\x21\x7E\x88\xF4\x6D\x4E\x06\x01\xC0\xA8\x01\x14\x84\x48\x4E\x55\xDF\xE8\xF7\x94";
// random
u8 req_ipblock[]="\xAA\x21\xBB\x77\x6D\x6D\xAB\xF5\x01\xAA\xB8\xC1\x24\x87\x78\x3A\x44\xCE\x68\xF3\x14";
u32 req_ipblock_len=sizeof(req_ipblock)-1;
//xoteg_iam card
u8 INIT_UNK[]="\xFF\xFF\xFF\xFF\xff\xff\xff\xff\x01\xB2\xB6\x7F\x47\xEF\x32";
u32 INIT_UNK_len=sizeof(INIT_UNK)-1;
u8 rnd64bit_[]="\x33\x50\x82\x48\xF9\xF9\xA4\x59";
u32 rnd64bit_1=0x48825033;
u32 rnd64bit_2=0x59A4F9F9;
u32 ip1;
u32 port1;
skype_thing mythings3[] = {
{00, 0x03, 0x2A7E, 0x00},
{02, 0x08, 0x00, 0x00},
{00, 0x10, 0x0A, 0x00},
};
int mythings3_len=3;
skype_list list3 = {&list3, mythings3, mythings3_len, mythings3_len};
skype_thing mythings2[] = {
{03, 0x00, 0x0F/*(u32 )req_user*/, 0x00},
{04, 0x01, (u32 )req_ipblock, req_ipblock_len},
{00, 0x03, 0x63E0, 0x00},
{05, 0x07, (u32 )&list3, 0x00},
{01, 0x09, rnd64bit_1, rnd64bit_2},
{00, 0x18, 0x01, 0x00},
{00, 0x1B, 0x06, 0x00},
};
int mythings2_len=7;
skype_list list2 = {&list2, mythings2, mythings2_len, mythings2_len};
skype_thing mythings[] = {
{00, 0x00, 0x02, 0x00},
{04, 0x01, 0x0F/*(u32 )INIT_UNK*/, INIT_UNK_len},
{00, 0x02, 0x43, 0x00},
{05, 0x03, (u32 )&list2, 0x00},
{00, 0x04, 0x1E, 0x00},
};
int mythings_len=5;
skype_list list = {&list, mythings, mythings_len, mythings_len};
struct global_s *global;
global=(struct global_s *)globalptr;
//userid
memcpy(INIT_UNK,global->USERHEX,0x08);
mythings[1].m=(u32 )INIT_UNK;
mythings2[0].m=(u32 )global->REMOTE_NAME;
mythings2[2].m=global->LOCAL_SESSION_ID;
ip1=inet_addr(global->relayip);
port1=global->relayport;
mythings3[0].m=global->connid;
mythings3[1].m=htonl(ip1);
mythings3[1].n=port1;
result_len=main_pack_into(&list, result, sizeof(result)-1 );
if (DEBUG_LEVEL>=100) show_memory(result,result_len,"packed42:");
if (DEBUG_LEVEL>=100) main_unpack(result,result_len);
header_len=encode_to_7bit(header, result_len+2, header_len);
if (header_len==-1){
return -1;
};
// pkt size
send_len=0;
memcpy(send_pkt+send_len,header,header_len);
send_len+=header_len;
// cmd
send_pkt[send_len]=(char )0xAA;
send_len++;
send_pkt[send_len]=(char )0x03;
send_len++;
// seqnum
seqnum=bswap16(seqnum);
memcpy(send_pkt+send_len,(char *)&seqnum,2);
seqnum=bswap16(seqnum);
send_len+=2;
// 42 data
memcpy(send_pkt+send_len,result,result_len);
send_len+=result_len;
//show_memory(send_pkt,send_len,"push prepare pkt");
*s_len=send_len;
return 0;
};
int parse_cmd_lines(_MIPD_ int argc, char* argv[], char *globalptr) {
int len;
u32 secret_p[17], secret_q[17];
char public_key[0x81];
char secret_key[0x81];
char str_skypename[0x1000];
char user_cred[0x101];
char str_remote_skype[1024];
char tmpdestip[1024];
char tmpdestport[1024];
char line1[0x1000];
char line2[0x1000];
int fd;
struct global_s *global;
global=(struct global_s *)globalptr;
memset(public_key,0,sizeof(public_key));
memset(secret_key,0,sizeof(secret_key));
fd=open("a_cred.txt",O_RDONLY);
len=read(fd,&line1,0x1000);
close(fd);
if (len<=0){
if(DEBUG_LEVEL>=100) printf("file open error\n");
return -1;
};
if (len>=0x1000){
if(DEBUG_LEVEL>=100) printf("file too big\n");
return -1;
};
line1[len]=0;
while(len>0){
if (line1[len]==0x0D){
line1[len]=0;
};
if (line1[len]==0x0A){
line1[len]=0;
};
len--;
}
len=strlen(line1);
//printf("%c %c\n",line1[len-2], line1[len-1] );
if ( (line1[len-2]==':') && (line1[len-1]=='2') ){
if (DEBUG_LEVEL>=100) printf("format version 2\n");
parse_input_line_type2(line1, (char*)&public_key, (char*)&secret_key, (char*)&str_skypename, (char*)&user_cred);
memcpy(global->xoteg_pub,public_key,0x80);
memcpy(global->xoteg_sec,secret_key,0x80);
show_memory(global->xoteg_pub,0x80,"xoteg_pubkey:");
show_memory(global->xoteg_sec,0x80,"xoteg_seckey:");
}else{
if (DEBUG_LEVEL>=100) printf("format version 1\n");
parse_input_line(line1, secret_p, secret_q, (char*)&str_skypename, (char*)&user_cred);
restore_user_keypair(_MIPP_ secret_p, secret_q, public_key, secret_key);
memcpy(global->xoteg_pub,public_key,0x80);
memcpy(global->xoteg_sec,secret_key,0x80);
show_memory(global->xoteg_pub,0x80,"xoteg_pubkey:");
show_memory(global->xoteg_sec,0x80,"xoteg_seckey:");
};
if(DEBUG_LEVEL>=100) printf("skypename=%s\n",str_skypename);
show_memory(user_cred,0x100,"cred:");
memcpy(global->CREDENTIALS,"\x00\x00\x00\x01",4);
memcpy(global->CREDENTIALS+4,user_cred,0x100);
global->CREDENTIALS_LEN=0x104;
//
fd=open("a_sendto.txt",O_RDONLY);
len=read(fd,&line2,0x1000);
close(fd);
if (len<=0){
if(DEBUG_LEVEL>=100) printf("file open error\n");
return -1;
};
if (len>=0x1000){
if(DEBUG_LEVEL>=100) printf("file too big\n");
return -1;
};
line2[len]=0;
parse_input_line2(line2, (char *)&str_remote_skype, (char *)&tmpdestip, (char *)&tmpdestport);
if(DEBUG_LEVEL>=100) printf("remote_skypename=%s\n",str_remote_skype);
if(DEBUG_LEVEL>=100) printf("destip=%s\n",tmpdestip);
if(DEBUG_LEVEL>=100) printf("destport=%s\n",tmpdestport);
strncpy(global->remoteip,tmpdestip,1024);
global->remoteport=atoi(tmpdestport);
show_memory(global->CREDENTIALS,0x104,"CREDENTIALS:");
strcpy(global->REMOTE_NAME,str_remote_skype);
strcat(global->CHAT_STRING,"#");
strcat(global->CHAT_STRING,str_skypename);
strcat(global->CHAT_STRING,"/$");
strcat(global->CHAT_STRING,global->REMOTE_NAME);
strcat(global->CHAT_STRING,";");
strcat(global->CHAT_STRING,global->CHAT_RND_ID);
strcat(global->CHAT_PEERS,global->REMOTE_NAME);
strcat(global->CHAT_PEERS," ");
strcat(global->CHAT_PEERS,str_skypename);
if(DEBUG_LEVEL>=100) printf("CHAT_STRING: %s\n",global->CHAT_STRING);
if(DEBUG_LEVEL>=100) printf("REMOTE_NAME: %s\n",global->REMOTE_NAME);
if(DEBUG_LEVEL>=100) printf("CHAT_PEERS: %s\n",global->CHAT_PEERS);
fd=open("a_msg.txt",O_RDONLY);
len=read(fd,&global->MSG_TEXT,0x1000);
close(fd);
if (len<=0){
if(DEBUG_LEVEL>=100) printf("file open error\n");
return -1;
};
if (len>=0x1000){
if(DEBUG_LEVEL>=100) printf("file too big\n");
return -1;
};
global->MSG_TEXT[len]=0;
if(DEBUG_LEVEL>=100) printf("\nMSG_TEXT: %s\n",global->MSG_TEXT);
return 0;
}
main()
{
show_memory();
}
/////////////////////////////////////////
// aes crypt
/////////////////////////////////////////
int process_aes_crypt(char *globalptr, char *data, int datalen, int usekey, int blkseq, int need_xor){
static u8 zero[32];
static u32 ks[60];
u32 blk[0x10];
int j;
int k;
char *ptr;
struct global_s *global;
global=(struct global_s *)globalptr;
memset(ks,0,sizeof(ks));
// if no key, use zero
memset(zero,0,sizeof(zero));
// use real key
if (usekey){
memcpy(zero,global->AES_KEY,0x20);
};
// setup key
aes_256_setkey (zero, ks);
// for debug aes encoding
// print key material
if (0) {
ptr=(char *)ks;
show_memory(ptr, 60*4, "KeyMat");
};
// setup control block
memset (blk, 0, 0x10);
//if using key, control block have local and remote session id data.
if (usekey){
blk[0]=global->LOCAL_SESSION_ID * 0x10000 + global->REMOTE_SESSION_ID;
};
// need xor session id in control block
if (need_xor){
blk[0]=blk[0] ^ 0xFFFFFFFF;
};
blk[1]=blk[0];
blk[3]=blk[3] + (blkseq * 0x10000);
show_memory(data, datalen, "Before AES crypt");
// process aes crypt
for (j = 0; j+16 < datalen; j += 16){
aes_256_encrypt (blk, blk+4, ks);
dword(data+j+ 0) ^= bswap32(blk[4]);
dword(data+j+ 4) ^= bswap32(blk[5]);
dword(data+j+ 8) ^= bswap32(blk[6]);
dword(data+j+12) ^= bswap32(blk[7]);
blk[3]++;
};
if (j < datalen){
aes_256_encrypt (blk, blk+4, ks);
for (k = 0; j < datalen; j++, k++) data[j] ^= ((u8 *)(blk+4))[k^3];
};
show_memory(data, datalen, "After AES crypt");
return 0;
};
