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#include "common.h"
int lock_file(char *filename)
{
int fd;
if (!filename)
return -1;
if ((fd = open(filename,O_RDONLY | O_CREAT , S_IRWXU)) < 0) {
print_error("lock_file","open",modsec_rpc_log_file,errno);
return -1;
}
flock(fd,LOCK_EX);
return fd;
}
int unlock_file(int fd)
{
flock(fd,LOCK_UN);
return 0;
}
int print_request(char* url,char *command,parameter_t *parameters, int num_of_parameters, int mask)
{
char time_str[64], line[1024*1024];
time_t t;
int fd;
int i;
switch (atoi(modsec_rpc_log_level)) {
case DEBUG:
time(&t);
ctime_r(&t,time_str);
time_str[strlen(time_str)-1] = '\0';
if ((fd = open(modsec_rpc_log_file,O_WRONLY | O_CREAT | O_APPEND | O_SYNC , S_IRWXU)) < 0) {
print_error("print_request","open",modsec_rpc_log_file,errno);
fd=2;
}
flock(fd,LOCK_EX);
sprintf(line,"%s:REQUEST-BEGIN:======================================\n",time_str);
line[1024*1024-1]='\0';
write(fd,line,strlen(line));
snprintf(line,1024*1024,"URL:%s\nCommand:%s\n",url,command);
line[1024*1024-1]='\0';
write(fd,line,strlen(line));
for (i=0; i<num_of_parameters; i++) {
snprintf(line,1024*1024,"%s=",parameters[i].name);
line[1024*1024-1]='\0';
write(fd,line,strlen(line));
if (i == mask) {
sprintf(line,"XXXXXXX\n");
write(fd,line,strlen(line));
} else {
if (parameters[i].value) {
snprintf(line,1024*1024,"%s\n",parameters[i].value);
line[1024*1024-1]='\0';
}
else sprintf(line,"\n");
write(fd,line,strlen(line));
}
}
sprintf(line,"%s:REQUEST-END:========================================\n",time_str);
write(fd,line,strlen(line));
flock(fd,LOCK_UN);
if (fd!=2) close(fd);
break;
}
return 0;
}
int print_request_force(char* url,char *command,parameter_t *parameters, int num_of_parameters, int mask)
{
char real_level[1024];
strcpy(real_level,modsec_rpc_log_level);
strcpy(modsec_rpc_log_level,"1");
print_request(url,command,parameters,num_of_parameters,mask);
strcpy(modsec_rpc_log_level,real_level);
return 0;
}
int print_reply(char *reply)
{
char time_str[64];
time_t t;
int fd;
printf("%s",reply);
switch (atoi(modsec_rpc_log_level)) {
case DEBUG:
time(&t);
ctime_r(&t,time_str);
time_str[strlen(time_str)-1] = '\0';
if ((fd = open(modsec_rpc_log_file,O_WRONLY | O_CREAT | O_APPEND | O_SYNC , S_IRWXU)) < 0) {
print_error("print_request","open",modsec_rpc_log_file,errno);
fd=2;
}
flock(fd,LOCK_EX);
write(fd,reply,strlen(reply));
flock(fd,LOCK_UN);
if (fd!=2) close(fd);
break;
}
return 0;
}
int print_error(char *func1, char* func2, char* str, int err)
{
char out[1024], time_str[64], line[1024*1024];
char str1[1024], str2[1024], str3[1024];
time_t t;
int fd;
time(&t);
ctime_r(&t,time_str);
time_str[strlen(time_str)-1] = '\0';
if (err)
strcpy(out,strerror(err));
else
strcpy(out,"");
if (!func1)
strcpy(str1,"");
else {
strncpy(str1,func1,1024);
str1[1023]='\0';
}
if (!func2)
strcpy(str2,"");
else {
strncpy(str2,func2,1024);
str2[1023]='\0';
}
if (!str)
strcpy(str3,"");
else {
strncpy(str3,str,1024);
str3[1023]='\0';
}
if ((fd = open(modsec_rpc_log_file,O_WRONLY | O_CREAT | O_APPEND | O_SYNC , S_IRWXU)) < 0) {
fprintf(stderr,"%s:ERROR:print_error:open:%s:%s\n",time_str,strerror(errno),modsec_rpc_log_file);
fd=2;
}
snprintf(line,1024*1024,"%s:ERROR:%s:%s:%s:%s\n",time_str,str1,str2,out,str3);
line[1024*1024-1]='\0';
flock(fd,LOCK_EX);
write(fd,line,strlen(line));
flock(fd,LOCK_UN);
if (fd!=2) close(fd);
return 0;
}
int is_proxy_up()
{
int pid;
FILE *fp;
if ((fp = fopen(modsec_proxy_pid,"r")) == NULL )
return 0;
if (fscanf(fp,"%d",&pid) == 0) {
print_error("is_proxy_up","fscanf","missing PID",0);
fclose(fp);
return 0;
}
fclose(fp);
if (!pid || kill(pid,0))
return 0;
return 1;
}
int run_cmd(char *command, char *output, int output_size)
{
char line[1024];
FILE *fp;
if (output_size > 0 && output) output[0]='\0';
if (!(fp=popen(command,"r"))) {
print_error("run_cmd","popen",command,errno);
return -1;
}
while (output_size && fgets(line,output_size>1024?1024:output_size,fp)) {
strcat(output, line);
output_size -= strlen(line);
}
if (!output_size)
while (fgets(line,1024,fp));
pclose(fp);
return 0;
}
int find_param_idx(char *parameter_name, parameter_t *parameters, int max_parameters)
{
int i, idx=-1;
for (i = 0; (i < max_parameters) && (idx < 0); i++)
if ( strstr(parameters[i].name,parameter_name) )
idx=i;
return idx;
}
int parse_file(char *filename, parameter_t *parameters, int max_parameters)
{
char line[1024], *ptr;
int i;
FILE *fp;
if (!max_parameters || (parameters == NULL) || (filename == NULL)) {
print_error("parse_file","invalid input parameters","none",0);
return 0;
}
if ((fp = fopen(filename,"r")) == NULL ) {
print_error("parse_file","fopen",filename,errno);
return 0;
}
i=0;
while ( i < max_parameters && fgets(line,1024,fp)) {
if (ptr = strstr(line,"#"))
*ptr='\0';
if (sscanf(line,"%[^=]=%s",parameters[i].name,parameters[i].value) != 2)
continue;
i++;
}
fclose(fp);
return i;
}
int change_file(char *filename, parameter_t parameter)
{
char line[1024], *name, *value;
int i, found=0;
FILE *fp;
if (filename == NULL)
return 0;
if ((fp = fopen(filename,"r+")) == NULL )
return 0;
i=0;
while ( fgets(line,1024,fp)) {
sscanf(line,"%[^=]=%s",name,value);
if (name && !strcmp(name,parameter.name)) {
fprintf(fp,"%s=%s\n",name,parameter.value);
found=1;
continue;
} else fprintf(fp,"%s",line);
}
fclose(fp);
return found;
}
int copy_file(char *src_file, char *dst_file)
{
char line[1024];
FILE *sfp, *dfp;
if (src_file == NULL || dst_file == NULL)
return 0;
if ((sfp = fopen(src_file,"r")) == NULL )
return 0;
if ((dfp = fopen(dst_file,"w")) == NULL ) {
fclose(sfp);
return 0;
}
while ( fgets(line,1024,sfp))
fprintf(dfp,"%s",line);
fclose(sfp);
fclose(dfp);
return 1;
}
int parse_query(char *query, parameter_t *parameters, int max_parameters)
{
char *ptr, *dst_ptr, num[3];
int i, len;
if (!max_parameters || (parameters == NULL) || (query == NULL))
return 0;
ptr=query;
i=0;
while ((i < max_parameters) && *ptr) {
parameters[i].name[0] = '\0';
dst_ptr = parameters[i].name;
len=0;
while (*ptr && (*ptr != '=') && (len++ < MAX_NAME_LENGTH)) {
if (*ptr == '%' && *(ptr+1) && *(ptr+2)) {
num[0]=*(ptr+1);
num[1]=*(ptr+2);
num[2]='\0';
ptr += 3;
*dst_ptr=(char)strtol(num,NULL,16);
if (*dst_ptr) dst_ptr++;
} else *dst_ptr++ = *ptr++;
}
if (len >= MAX_NAME_LENGTH)
while (*ptr && (*ptr != '='))
*ptr++;
if (*ptr) ptr++;
*dst_ptr = '\0';
parameters[i].value[0] = '\0';
dst_ptr = parameters[i].value;
len=0;
while (*ptr && (*ptr != '&') && (len++ < MAX_VALUE_LENGTH)) {
if (*ptr == '%' && *(ptr+1) && *(ptr+2)) {
num[0]=*(ptr+1);
num[1]=*(ptr+2);
num[2]='\0';
ptr += 3;
*dst_ptr=(char)strtol(num,NULL,16);
if (*dst_ptr) dst_ptr++;
} else *dst_ptr++ = *ptr++;
}
if (len >= MAX_VALUE_LENGTH)
while (*ptr && (*ptr != '&'))
*ptr++;
if (*ptr) ptr++;
*dst_ptr = '\0';
i++;
}
return i;
}
int parse_query_and_body (parameter_t *parameters, int max_parameters)
{
char *query, *content_length_env;
int i, num_of_params, body_len, content_length;
query = getenv("QUERY_STRING");
if (query && *query)
return(parse_query(query,parameters,max_parameters));
else {
content_length_env = getenv("CONTENT_LENGTH");
if (!content_length_env)
return 0;
if (! *content_length_env)
return 0;
content_length=atol(content_length_env);
if (!(query=malloc(content_length+1)))
return 0;
i = 1; body_len=0;
while ( (body_len < content_length) && (i>0) ) {
i = read(0,query+body_len,(content_length-body_len)<1024?(content_length-body_len):1024);
if (i > 0 ) body_len+=i;
}
query[body_len] = '\0';
num_of_params = parse_query(query,parameters,max_parameters);
free(query);
return num_of_params;
}
}
int parse_cli (parameter_t *parameters, int max_parameters, int num_of_args, char *args[])
{
char name[MAX_NAME_LENGTH], value[MAX_VALUE_LENGTH];
int i, num_of_params=0;
if (num_of_args > 0)
for (i=0; i<num_of_args && i<max_parameters; i++) {
if (sscanf(args[i],"%[^=]=%s",name,value) < 2)
continue;
if (strlen(name) < MAX_NAME_LENGTH)
strcpy(parameters[num_of_params].name,name);
else continue;
if (strlen(value) < MAX_VALUE_LENGTH) {
strcpy(parameters[num_of_params].value,value);
num_of_params++;
}
}
return num_of_params;
}
int send_request(char *request,char *ip,char *port,char *reply,int max_reply_size)
{
int sock, i, reply_len;
struct sockaddr_in servaddr;
reply[0]='\0';
reply_len=0;
if (!request || !*request || !ip || !port || !reply || !max_reply_size)
return -1;
memset(&servaddr, 0, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons((short)atol(port));
if ( inet_aton(ip, &servaddr.sin_addr) <= 0 )
return -1;
if ( (sock = socket(AF_INET, SOCK_STREAM, 0)) < 0 ) {
print_error("send_request","socket",ip,errno);
return -1;
}
if ( connect(sock, (struct sockaddr *) &servaddr, sizeof(servaddr) ) < 0 ) {
print_error("send_request","connect",ip,errno);
close(sock);
return -1;
}
i = strlen(request);
if ( write(sock,request,i) < i ) {
print_error("send_request","write",ip,errno);
shutdown(sock,SHUT_RDWR);
close(sock);
return -1;
}
i = 1; reply_len=0;
while ( (reply_len < max_reply_size) && (i>0) ) {
i = read(sock,reply+reply_len,(max_reply_size-reply_len)<1024?(max_reply_size-reply_len):1024);
if (i > 0 ) reply_len+=i;
}
reply[reply_len] = '\0';
shutdown(sock,SHUT_RDWR);
close(sock);
return reply_len;
}
int find_ip_idx(char *ip, blocklist_t *blocklist, int num_of_ips)
{
int i, idx=-1;
for (i = 0; (i < num_of_ips) && (idx < 0); i++)
if ( strstr(blocklist[i].ip,ip) )
idx=i;
return idx;
}
int remove_ip_idx(char *ip, blocklist_t *blocklist, int num_of_ips)
{
int i, j, idx=-1;
time_t t;
time(&t);
for (i = 0; i < num_of_ips; i++)
if ( (ip && strstr(blocklist[i].ip,ip)) || (!ip && (t > blocklist[i].end)) ) {
idx=i;
for (j=i; j<(num_of_ips-1); j++) {
strcpy(blocklist[j].ip,blocklist[j+1].ip);
blocklist[j].start = blocklist[j+1].start;
blocklist[j].duration = blocklist[j+1].duration;
blocklist[j].end = blocklist[j+1].end;
strcpy(blocklist[j].token,blocklist[j+1].token);
}
num_of_ips--;
}
return idx;
}
int read_conf_file (char *filename)
{
int idx, num_of_params;
parameter_t parameters[MAX_PARAMS];
num_of_params=parse_file(filename,parameters,MAX_PARAMS);
if ((idx = find_param_idx("MODSEC_CLI_HOME",parameters,num_of_params)) >= 0)
strcpy(modsec_cli_home,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_RPC_HOME",parameters,num_of_params)) >= 0)
strcpy(modsec_rpc_home,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_RPC_LOG_FILE",parameters,num_of_params)) >= 0)
strcpy(modsec_rpc_log_file,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_RPC_LOG_LEVEL",parameters,num_of_params)) >= 0)
strcpy(modsec_rpc_log_level,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_RPC_SSL_LOCKFILE",parameters,num_of_params)) >= 0)
strcpy(modsec_rpc_ssl_lockfile,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_RPC_SENSOR_LOCKFILE",parameters,num_of_params)) >= 0)
strcpy(modsec_rpc_sensor_lockfile,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_RPC_REVERSEPROXY_LOCKFILE",parameters,num_of_params)) >= 0)
strcpy(modsec_rpc_reverseproxy_lockfile,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_RPC_EXTERNALNIC_LOCKFILE",parameters,num_of_params)) >= 0)
strcpy(modsec_rpc_externalnic_lockfile,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_RPC_MUI_LOCKFILE",parameters,num_of_params)) >= 0)
strcpy(modsec_rpc_mui_lockfile,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_RPC_LOG_LEVEL",parameters,num_of_params)) >= 0)
strcpy(modsec_rpc_log_level,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_PROXY_HOME",parameters,num_of_params)) >= 0)
strcpy(modsec_proxy_home,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_PROXY_IP",parameters,num_of_params)) >= 0)
strcpy(modsec_proxy_ip,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_PROXY_PORT",parameters,num_of_params)) >= 0)
strcpy(modsec_proxy_port,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_PROXY_NETWORK_PREFIX",parameters,num_of_params)) >= 0)
strcpy(modsec_proxy_network_prefix,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_PROXY_BIN",parameters,num_of_params)) >= 0)
strcpy(modsec_proxy_bin,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_PROXY_CONF",parameters,num_of_params)) >= 0)
strcpy(modsec_proxy_conf,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_PROXY_EXT_NIC",parameters,num_of_params)) >= 0)
strcpy(modsec_proxy_ext_nic,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_PROXY_PID",parameters,num_of_params)) >= 0)
strcpy(modsec_proxy_pid,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_PROXY_WHITELIST",parameters,num_of_params)) >= 0)
strcpy(modsec_proxy_whitelist,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_PROXY_BLACKLIST",parameters,num_of_params)) >= 0)
strcpy(modsec_proxy_blacklist,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_PROXY_TIMEOUT",parameters,num_of_params)) >= 0)
strcpy(modsec_proxy_timeout,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_PROXY_EXCHANGE",parameters,num_of_params)) >= 0)
strcpy(modsec_proxy_exchange,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_PROXY_EXT_IPS",parameters,num_of_params)) >= 0)
strcpy(modsec_proxy_ext_ips,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_MUI_UI_ADMIN",parameters,num_of_params)) >= 0)
strcpy(modsec_mui_ui_admin,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_RPC_PASSWORD_FILE",parameters,num_of_params)) >= 0)
strcpy(modsec_rpc_password_file,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_MUI_UI_IPADDRESS",parameters,num_of_params)) >= 0)
strcpy(modsec_mui_ui_ipaddress,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_MUI_UI_PORT",parameters,num_of_params)) >= 0)
strcpy(modsec_mui_ui_port,parameters[idx].value);
if ((idx = find_param_idx("SENSOR_ID",parameters,num_of_params)) >= 0)
strcpy(sensor_id,parameters[idx].value);
if ((idx = find_param_idx("SERIAL",parameters,num_of_params)) >= 0)
strcpy(serial,parameters[idx].value);
if ((idx = find_param_idx("VERSION_NUMBER",parameters,num_of_params)) >= 0)
strcpy(version_number,parameters[idx].value);
if ((idx = find_param_idx("RELEASE_DATE",parameters,num_of_params)) >= 0)
strcpy(release_date,parameters[idx].value);
if ((idx = find_param_idx("BRIDGE_MODE",parameters,num_of_params)) >= 0)
strcpy(bridge_mode,parameters[idx].value);
if ((idx = find_param_idx("DATA_DISK_SPACE",parameters,num_of_params)) >= 0)
strcpy(data_disk_space,parameters[idx].value);
if ((idx = find_param_idx("CONN_RATE",parameters,num_of_params)) >= 0)
strcpy(conn_rate,parameters[idx].value);
if ((idx = find_param_idx("CONN_RATE_PER_ADDR",parameters,num_of_params)) >= 0)
strcpy(conn_rate_per_addr,parameters[idx].value);
if ((idx = find_param_idx("CONNS",parameters,num_of_params)) >= 0)
strcpy(conns,parameters[idx].value);
if ((idx = find_param_idx("CONNS_PER_ADDR",parameters,num_of_params)) >= 0)
strcpy(conns_per_addr,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_RPC",parameters,num_of_params)) >= 0)
strcpy(modsec_rpc,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_PROXY",parameters,num_of_params)) >= 0)
strcpy(modsec_proxy,parameters[idx].value);
if ((idx = find_param_idx("MODSEC_PROXY_SCRIPT",parameters,num_of_params)) >= 0)
strcpy(modsec_proxy_script,parameters[idx].value);
return num_of_params;
}
int init_cgi()
{
char *modsec;
setresuid(0,0,0);
setresgid(0,0,0);
strcpy(modsec_cli_home,"/opt/modsecurity-cli");
strcpy(modsec_rpc_home,"/opt/modsecurity-rpc");
strcpy(modsec_rpc_log_file,"/opt/modsecurity-rpc/var/logs/rpc.log");
strcpy(modsec_rpc_log_level,"0");
strcpy(modsec_rpc_ssl_lockfile,"/opt/modsecurity-rpc/var/run/ssl.lock");
strcpy(modsec_rpc_sensor_lockfile,"/opt/modsecurity-rpc/var/run/sensor.lock");
strcpy(modsec_rpc_externalnic_lockfile,"/opt/modsecurity-rpc/var/run/externalnic.lock");
strcpy(modsec_rpc_reverseproxy_lockfile,"/opt/modsecurity-rpc/var/run/reverseproxy.lock");
strcpy(modsec_rpc_mui_lockfile,"/opt/modsecurity-rpc/var/run/mui.lock");
strcpy(modsec_proxy_home,"/opt/modsecurity-proxy");
strcpy(modsec_proxy_ip,"127.0.0.2");
strcpy(modsec_proxy_port,"80");
strcpy(modsec_proxy_bin,"/bin/modsec-proxyd");
strcpy(modsec_proxy_script,"/etc/init.d/modsec-proxy");
strcpy(modsec_proxy_conf,"/etc/httpd.conf");
strcpy(modsec_proxy_ext_nic,"eth0");
strcpy(modsec_proxy_network_prefix,"172.16.0.0/12");
strcpy(modsec_proxy_pid,"/opt/modsecurity-proxy/var/run/httpd.pid");
strcpy(modsec_proxy_whitelist,"/opt/breach/etc/modsec_whitelist.conf");
strcpy(modsec_proxy_blacklist,"/opt/breach/etc/modsec_blacklist.conf");
strcpy(modsec_proxy_timeout,"120");
strcpy(modsec_proxy_exchange,"/opt/modsecurity-proxy/var/exchange");
strcpy(modsec_proxy_ext_ips,"/opt/breach/etc/modsec_ips.conf");
strcpy(modsec_mui_ui_ipaddress,"127.0.0.1");
strcpy(modsec_mui_ui_port,"443");
strcpy(modsec_rpc_password_file,"/opt/modsecurity-rpc/etc/.htpasswd");
strcpy(modsec_mui_ui_admin,"admin");
strcpy(sensor_id,"1");
strcpy(serial,"1");
strcpy(version_number,"2.0");
strcpy(bridge_mode,"off");
strcpy(data_disk_space,"60");
strcpy(release_date,"11-15-2006");
strcpy(conn_rate,"0");
strcpy(conn_rate_per_addr,"0");
strcpy(conns,"0");
strcpy(conns_per_addr,"0");
if (modsec = getenv("MODSEC"))
read_conf_file(modsec);
else {
if (!read_conf_file("/opt/breach/etc/modsec.conf"))
read_conf_file("/etc/modsec.conf");
}
return 0;
}
