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added getting proxy from env PROXYCHAINS_ONE_PROXY #276

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added getting proxy from env PROXYCHAINS_ONE_PROXY #276

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6 changes: 6 additions & 0 deletions README
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Original file line number Diff line number Diff line change
Expand Up @@ -202,6 +202,12 @@ Usage Example:
in this example it will resolve targethost.com through proxy(or chained proxies)
specified by proxychains.conf

Usage Example:
$ PROXYCHAINS_ONE_PROXY="socks4 127.0.0.1 9050" proxychains telnet targethost.com

in this example it will using only proxy from envirmoment variable PROXYCHAINS_ONE_PROXY
and ignore proxy list from config file

Known Problems:
---------------
- newer versions of nmap try to determine the network interface to use
Expand Down
1 change: 1 addition & 0 deletions src/common.h
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Expand Up @@ -3,6 +3,7 @@

#define PROXYCHAINS_CONF_FILE_ENV_VAR "PROXYCHAINS_CONF_FILE"
#define PROXYCHAINS_QUIET_MODE_ENV_VAR "PROXYCHAINS_QUIET_MODE"
#define PROXYCHAINS_ONE_PROXY_ENV_VAR "PROXYCHAINS_ONE_PROXY"
#define PROXYCHAINS_CONF_FILE "proxychains.conf"
#define LOG_PREFIX "[proxychains] "
#ifndef SYSCONFDIR
Expand Down
92 changes: 53 additions & 39 deletions src/libproxychains.c
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Expand Up @@ -79,6 +79,7 @@ pthread_once_t init_once = PTHREAD_ONCE_INIT;
static int init_l = 0;

static inline void get_chain_data(proxy_data * pd, unsigned int *proxy_count, chain_type * ct);
inline int populate_proxychain(proxy_data * pd, unsigned int *proxy_count, chain_type * ct, char * buff, int count);

static void* load_sym(char* symname, void* proxyfunc) {

Expand Down Expand Up @@ -259,9 +260,10 @@ static int proxy_from_string(const char *proxystring,

/* get configuration from config file */
static void get_chain_data(proxy_data * pd, unsigned int *proxy_count, chain_type * ct) {
int count = 0, port_n = 0, list = 0;
char buff[1024], type[1024], host[1024], user[1024];
int count = 0, list = 0;
char buff[1024], user[1024];
char *env;
char *env_one_proxy_line;
char local_in_addr_port[32];
char local_in_addr[32], local_in_port[32], local_netmask[32];
FILE *file = NULL;
Expand All @@ -275,57 +277,27 @@ static void get_chain_data(proxy_data * pd, unsigned int *proxy_count, chain_typ
*ct = DYNAMIC_TYPE;

env = get_config_path(getenv(PROXYCHAINS_CONF_FILE_ENV_VAR), buff, sizeof(buff));
if( ( file = fopen(env, "r") ) == NULL )
{
if((file = fopen(env, "r")) == NULL) {
perror("couldnt read configuration file");
exit(1);
}

env_one_proxy_line = getenv(PROXYCHAINS_ONE_PROXY_ENV_VAR);
if (env_one_proxy_line)
count = populate_proxychain(pd, proxy_count, ct, env_one_proxy_line, count);

env = getenv(PROXYCHAINS_QUIET_MODE_ENV_VAR);
if(env && *env == '1')
proxychains_quiet_mode = 1;

while(fgets(buff, sizeof(buff), file)) {
if(buff[0] != '\n' && buff[strspn(buff, " ")] != '#') {
/* proxylist has to come last */
if(list) {
if(list && !env_one_proxy_line) {
if(count >= MAX_CHAIN)
break;

memset(&pd[count], 0, sizeof(proxy_data));

pd[count].ps = PLAY_STATE;
port_n = 0;

int ret = sscanf(buff, "%s %s %d %s %s", type, host, &port_n, pd[count].user, pd[count].pass);
if(ret < 3 || ret == EOF) {
if(!proxy_from_string(buff, type, host, &port_n, pd[count].user, pd[count].pass)) {
inv:
fprintf(stderr, "error: invalid item in proxylist section: %s", buff);
exit(1);
}
}

memset(&pd[count].ip, 0, sizeof(pd[count].ip));
pd[count].ip.is_v6 = !!strchr(host, ':');
pd[count].port = htons((unsigned short) port_n);
ip_type* host_ip = &pd[count].ip;
if(1 != inet_pton(host_ip->is_v6 ? AF_INET6 : AF_INET, host, host_ip->addr.v6)) {
fprintf(stderr, "proxy %s has invalid value or is not numeric\n", host);
exit(1);
}

if(!strcmp(type, "http")) {
pd[count].pt = HTTP_TYPE;
} else if(!strcmp(type, "socks4")) {
pd[count].pt = SOCKS4_TYPE;
} else if(!strcmp(type, "socks5")) {
pd[count].pt = SOCKS5_TYPE;
} else
goto inv;

if(port_n)
count++;
count = populate_proxychain(pd, proxy_count, ct, buff, count);
} else {
if(strstr(buff, "[ProxyList]")) {
list = 1;
Expand Down Expand Up @@ -419,6 +391,48 @@ static void get_chain_data(proxy_data * pd, unsigned int *proxy_count, chain_typ
PDEBUG("proxy_dns: %s\n", proxychains_resolver ? "ON" : "OFF");
}

int populate_proxychain(proxy_data * pd, unsigned int *proxy_count, chain_type * ct, char * buff, int count) {
int port_n = 0;
char type[1024], host[1024];

memset(&pd[count], 0, sizeof(proxy_data));

pd[count].ps = PLAY_STATE;
port_n = 0;

int ret = sscanf(buff, "%s %s %d %s %s", type, host, &port_n, pd[count].user, pd[count].pass);
if(ret < 3 || ret == EOF) {
if(!proxy_from_string(buff, type, host, &port_n, pd[count].user, pd[count].pass)) {
inv:
fprintf(stderr, "error: invalid item in proxylist section: %s", buff);
exit(1);
}
}

memset(&pd[count].ip, 0, sizeof(pd[count].ip));
pd[count].ip.is_v6 = !!strchr(host, ':');
pd[count].port = htons((unsigned short) port_n);
ip_type* host_ip = &pd[count].ip;
if(1 != inet_pton(host_ip->is_v6 ? AF_INET6 : AF_INET, host, host_ip->addr.v6)) {
fprintf(stderr, "proxy %s has invalid value or is not numeric\n", host);
exit(1);
}

if(!strcmp(type, "http")) {
pd[count].pt = HTTP_TYPE;
} else if(!strcmp(type, "socks4")) {
pd[count].pt = SOCKS4_TYPE;
} else if(!strcmp(type, "socks5")) {
pd[count].pt = SOCKS5_TYPE;
} else
goto inv;

if(port_n)
count++;

return count;
}

/******* HOOK FUNCTIONS *******/

int close(int fd) {
Expand Down