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hydra-nntp.c
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hydra-nntp.c
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#include "hydra-mod.h"
#include "sasl.h"
/*
Based on:
RFC 3977: Network News Transfer Protocol (NNTP)
RFC 4643: Network News Transfer Protocol (NNTP) Extension for Authentication
*/
int32_t nntp_auth_mechanism = AUTH_CLEAR;
extern char *HYDRA_EXIT;
char *buf;
char *nntp_read_server_capacity(int32_t sock) {
char *ptr = NULL;
int32_t resp = 0;
char *buf = NULL;
do {
if (buf != NULL)
free(buf);
ptr = buf = hydra_receive_line(sock);
if (buf != NULL) {
if (isdigit((int32_t)buf[0]) && buf[3] == ' ')
resp = 1;
else {
if (buf[strlen(buf) - 1] == '\n')
buf[strlen(buf) - 1] = 0;
if (buf[strlen(buf) - 1] == '\r')
buf[strlen(buf) - 1] = 0;
#ifdef NO_STRRCHR
if ((ptr = rindex(buf, '\n')) != NULL) {
#else
if ((ptr = strrchr(buf, '\n')) != NULL) {
#endif
ptr++;
if (isdigit((int32_t)*ptr) && *(ptr + 3) == ' ')
resp = 1;
}
}
}
} while (buf != NULL && resp == 0);
return buf;
}
int32_t start_nntp(int32_t s, char *ip, int32_t port, unsigned char options, char *miscptr, FILE *fp) {
char *empty = "\"\"", *result = NULL;
char *login, *pass, buffer[500], buffer2[500], *fooptr;
int32_t i = 1;
if (strlen(login = hydra_get_next_login()) == 0)
login = empty;
if (strlen(pass = hydra_get_next_password()) == 0)
pass = empty;
while (i > 0 && hydra_data_ready(s) > 0)
i = hydra_recv(s, buffer, 300);
if (i < 0)
i = 0;
buffer[i] = 0;
switch (nntp_auth_mechanism) {
case AUTH_LOGIN:
sprintf(buffer, "AUTHINFO SASL LOGIN\r\n");
if (hydra_send(s, buffer, strlen(buffer), 0) < 0) {
return 1;
}
if ((buf = hydra_receive_line(s)) == NULL)
return 1;
if (buf == NULL || strstr(buf, "383") == NULL) {
hydra_report(stderr, "[ERROR] NNTP LOGIN AUTH : %s\n", buf);
free(buf);
return 3;
}
free(buf);
strcpy(buffer2, login);
hydra_tobase64((unsigned char *)buffer2, strlen(buffer2), sizeof(buffer2));
sprintf(buffer, "%.250s\r\n", buffer2);
if (hydra_send(s, buffer, strlen(buffer), 0) < 0) {
return 1;
}
if ((buf = hydra_receive_line(s)) == NULL)
return 1;
if (buf == NULL || strstr(buf, "383") == NULL) {
hydra_report(stderr, "[ERROR] NNTP LOGIN AUTH : %s\n", buf);
free(buf);
return 3;
}
free(buf);
strcpy(buffer2, pass);
hydra_tobase64((unsigned char *)buffer2, strlen(buffer2), sizeof(buffer2));
sprintf(buffer, "%.250s\r\n", buffer2);
break;
case AUTH_PLAIN:
sprintf(buffer, "AUTHINFO SASL PLAIN\r\n");
if (hydra_send(s, buffer, strlen(buffer), 0) < 0) {
return 1;
}
if ((buf = hydra_receive_line(s)) == NULL)
return 1;
if (buf == NULL || strstr(buf, "383") == NULL) {
hydra_report(stderr, "[ERROR] NNTP PLAIN AUTH : %s\n", buf);
free(buf);
return 3;
}
free(buf);
memset(buffer, 0, sizeof(buffer));
result = sasl_plain(buffer, login, pass);
if (result == NULL)
return 3;
char tmp_buffer[sizeof(buffer)];
sprintf(tmp_buffer, "%.250s\r\n", buffer);
strcpy(buffer, tmp_buffer);
break;
#ifdef LIBOPENSSL
case AUTH_CRAMMD5: {
int32_t rc = 0;
char *preplogin;
rc = sasl_saslprep(login, SASL_ALLOW_UNASSIGNED, &preplogin);
if (rc) {
return 3;
}
sprintf(buffer, "AUTHINFO SASL CRAM-MD5\r\n");
if (hydra_send(s, buffer, strlen(buffer), 0) < 0) {
return 1;
}
// get the one-time BASE64 encoded challenge
if ((buf = hydra_receive_line(s)) == NULL)
return 1;
if (buf == NULL || strstr(buf, "383") == NULL) {
hydra_report(stderr, "[ERROR] NNTP CRAM-MD5 AUTH : %s\n", buf);
free(buf);
return 3;
}
memset(buffer, 0, sizeof(buffer));
from64tobits((char *)buffer, buf + 4);
free(buf);
memset(buffer2, 0, sizeof(buffer2));
result = sasl_cram_md5(buffer2, pass, buffer);
if (result == NULL)
return 3;
sprintf(buffer, "%s %.250s", preplogin, buffer2);
hydra_tobase64((unsigned char *)buffer, strlen(buffer), sizeof(buffer));
char tmp_buffer[sizeof(buffer)];
sprintf(tmp_buffer, "%.250s\r\n", buffer);
strcpy(buffer, tmp_buffer);
free(preplogin);
} break;
case AUTH_DIGESTMD5: {
sprintf(buffer, "AUTHINFO SASL DIGEST-MD5\r\n");
if (hydra_send(s, buffer, strlen(buffer), 0) < 0)
return 1;
// receive
if ((buf = hydra_receive_line(s)) == NULL)
return 1;
if (buf == NULL || strstr(buf, "383") == NULL || strlen(buf) < 8) {
hydra_report(stderr, "[ERROR] NNTP DIGEST-MD5 AUTH : %s\n", buf);
free(buf);
return 3;
}
memset(buffer, 0, sizeof(buffer));
from64tobits((char *)buffer, buf + 4);
free(buf);
if (debug)
hydra_report(stderr, "DEBUG S: %s\n", buffer);
fooptr = buffer2;
result = sasl_digest_md5(fooptr, login, pass, buffer, miscptr, "nntp", NULL, 0, NULL);
if (result == NULL)
return 3;
if (debug)
hydra_report(stderr, "DEBUG C: %s\n", buffer2);
hydra_tobase64((unsigned char *)buffer2, strlen(buffer2), sizeof(buffer2));
sprintf(buffer, "%s\r\n", buffer2);
} break;
#endif
case AUTH_NTLM: {
unsigned char buf1[4096];
unsigned char buf2[4096];
// send auth and receive challenge
buildAuthRequest((tSmbNtlmAuthRequest *)buf2, 0, NULL, NULL);
to64frombits(buf1, buf2, SmbLength((tSmbNtlmAuthRequest *)buf2));
sprintf(buffer, "AUTHINFO SASL NTLM %s\r\n", (char *)buf1);
if (hydra_send(s, buffer, strlen(buffer), 0) < 0) {
return 1;
}
if ((buf = hydra_receive_line(s)) == NULL)
return 1;
if (buf == NULL || strstr(buf, "383") == NULL || strlen(buf) < 8) {
hydra_report(stderr, "[ERROR] NNTP NTLM AUTH : %s\n", buf);
free(buf);
return 3;
}
// recover challenge
from64tobits((char *)buf1, buf + 4);
free(buf);
buildAuthResponse((tSmbNtlmAuthChallenge *)buf1, (tSmbNtlmAuthResponse *)buf2, 0, login, pass, NULL, NULL);
to64frombits(buf1, buf2, SmbLength((tSmbNtlmAuthResponse *)buf2));
sprintf(buffer, "%s\r\n", (char *)buf1);
} break;
default: {
sprintf(buffer, "AUTHINFO USER %.250s\r\n", login);
if (hydra_send(s, buffer, strlen(buffer), 0) < 0) {
return 1;
}
buf = hydra_receive_line(s);
if (buf == NULL)
return 1;
if (buf[0] != '3') {
if (verbose || debug)
hydra_report(stderr, "[ERROR] Not an NNTP protocol or service shutdown: %s\n", buf);
free(buf);
return (3);
}
free(buf);
sprintf(buffer, "AUTHINFO PASS %.250s\r\n", pass);
} break;
}
if (hydra_send(s, buffer, strlen(buffer), 0) < 0) {
return 1;
}
buf = hydra_receive_line(s);
if (buf == NULL)
return 1;
if (buf[0] == '2') {
hydra_report_found_host(port, ip, "nntp", fp);
hydra_completed_pair_found();
free(buf);
if (memcmp(hydra_get_next_pair(), &HYDRA_EXIT, sizeof(HYDRA_EXIT)) == 0)
return 3;
return 1;
}
free(buf);
hydra_completed_pair();
if (memcmp(hydra_get_next_pair(), &HYDRA_EXIT, sizeof(HYDRA_EXIT)) == 0)
return 3;
return 2;
}
void service_nntp(char *ip, int32_t sp, unsigned char options, char *miscptr, FILE *fp, int32_t port, char *hostname) {
int32_t i = 0, run = 1, next_run = 1, sock = -1;
int32_t myport = PORT_NNTP, mysslport = PORT_NNTP_SSL, disable_tls = 0;
char *buffer1 = "CAPABILITIES\r\n";
hydra_register_socket(sp);
if (memcmp(hydra_get_next_pair(), &HYDRA_EXIT, sizeof(HYDRA_EXIT)) == 0)
return;
while (1) {
switch (run) {
case 1: /* connect and service init function */
if (sock >= 0)
sock = hydra_disconnect(sock);
// usleepn(300);
if ((options & OPTION_SSL) == 0) {
if (port != 0)
myport = port;
sock = hydra_connect_tcp(ip, myport);
port = myport;
} else {
if (port != 0)
mysslport = port;
sock = hydra_connect_ssl(ip, mysslport, hostname);
port = mysslport;
}
if (sock < 0) {
if (verbose || debug)
hydra_report(stderr, "[ERROR] Child with pid %d terminating, can not connect\n", (int32_t)getpid());
hydra_child_exit(1);
}
// usleepn(300);
buf = hydra_receive_line(sock);
if (buf == NULL || buf[0] != '2') { /* check the first line */
if (verbose || debug)
hydra_report(stderr, "[ERROR] Not an NNTP protocol or service shutdown: %s\n", buf);
hydra_child_exit(2);
}
free(buf);
/* send capability request */
if (hydra_send(sock, buffer1, strlen(buffer1), 0) < 0)
hydra_child_exit(2);
buf = nntp_read_server_capacity(sock);
if (buf == NULL) {
hydra_child_exit(2);
}
#ifdef LIBOPENSSL
if (!disable_tls) {
/* if we got a positive answer */
if (strstr(buf, "STARTTLS") != NULL) {
hydra_send(sock, "STARTTLS\r\n", strlen("STARTTLS\r\n"), 0);
free(buf);
buf = hydra_receive_line(sock);
/* 382 Begin TLS negotiation now */
if (buf == NULL || strstr(buf, "382") == NULL) {
if (verbose)
hydra_report(stderr, "[VERBOSE] TLS negotiation failed\n");
} else {
free(buf);
if ((hydra_connect_to_ssl(sock, hostname) == -1)) {
if (verbose)
hydra_report(stderr, "[ERROR] Can't use TLS\n");
disable_tls = 1;
run = 1;
break;
} else {
if (verbose)
hydra_report(stderr, "[VERBOSE] TLS connection done\n");
}
/* ask again capability request but in TLS mode */
if (hydra_send(sock, buffer1, strlen(buffer1), 0) < 0)
hydra_child_exit(2);
/* we asking again cause often plain and login can only
be negociate in SSL tunnel
*/
buf = nntp_read_server_capacity(sock);
if (buf == NULL) {
hydra_child_exit(2);
}
}
}
}
#endif
/*
AUTHINFO USER SASL
SASL PLAIN DIGEST-MD5 LOGIN NTLM CRAM-MD5
*/
#ifdef HAVE_PCRE
if (hydra_string_match(buf, "SASL\\s.*NTLM")) {
#else
if (strstr(buf, "NTLM") != NULL) {
#endif
nntp_auth_mechanism = AUTH_NTLM;
}
#ifdef LIBOPENSSL
#ifdef HAVE_PCRE
if (hydra_string_match(buf, "SASL\\s.*DIGEST-MD5")) {
#else
if (strstr(buf, "DIGEST-MD5") != NULL) {
#endif
nntp_auth_mechanism = AUTH_DIGESTMD5;
}
#ifdef HAVE_PCRE
if (hydra_string_match(buf, "SASL\\s.*CRAM-MD5")) {
#else
if (strstr(buf, "CRAM-MD5") != NULL) {
#endif
nntp_auth_mechanism = AUTH_CRAMMD5;
}
#endif
#ifdef HAVE_PCRE
if (hydra_string_match(buf, "SASL\\s.*PLAIN")) {
#else
if (strstr(buf, "PLAIN") != NULL) {
#endif
nntp_auth_mechanism = AUTH_PLAIN;
}
#ifdef HAVE_PCRE
if (hydra_string_match(buf, "SASL\\s.*LOGIN")) {
#else
if (strstr(buf, "LOGIN") != NULL) {
#endif
nntp_auth_mechanism = AUTH_LOGIN;
}
#ifdef HAVE_PCRE
if (hydra_string_match(buf, "AUTHINFO\\sUSER")) {
#else
if (strstr(buf, "AUTHINFO USER") != NULL) {
#endif
nntp_auth_mechanism = AUTH_CLEAR;
}
if ((miscptr != NULL) && (strlen(miscptr) > 0)) {
for (i = 0; i < strlen(miscptr); i++)
miscptr[i] = (char)toupper((int32_t)miscptr[i]);
if (strncmp(miscptr, "USER", 4) == 0)
nntp_auth_mechanism = AUTH_CLEAR;
if (strncmp(miscptr, "LOGIN", 5) == 0)
nntp_auth_mechanism = AUTH_LOGIN;
if (strncmp(miscptr, "PLAIN", 5) == 0)
nntp_auth_mechanism = AUTH_PLAIN;
#ifdef LIBOPENSSL
if (strncmp(miscptr, "CRAM-MD5", 8) == 0)
nntp_auth_mechanism = AUTH_CRAMMD5;
if (strncmp(miscptr, "DIGEST-MD5", 10) == 0)
nntp_auth_mechanism = AUTH_DIGESTMD5;
#endif
if (strncmp(miscptr, "NTLM", 4) == 0)
nntp_auth_mechanism = AUTH_NTLM;
}
if (verbose) {
switch (nntp_auth_mechanism) {
case AUTH_CLEAR:
hydra_report(stderr, "[VERBOSE] using NNTP AUTHINFO USER mechanism\n");
break;
case AUTH_LOGIN:
hydra_report(stderr, "[VERBOSE] using NNTP LOGIN AUTH mechanism\n");
break;
case AUTH_PLAIN:
hydra_report(stderr, "[VERBOSE] using NNTP PLAIN AUTH mechanism\n");
break;
#ifdef LIBOPENSSL
case AUTH_CRAMMD5:
hydra_report(stderr, "[VERBOSE] using NNTP CRAM-MD5 AUTH mechanism\n");
break;
case AUTH_DIGESTMD5:
hydra_report(stderr, "[VERBOSE] using NNTP DIGEST-MD5 AUTH mechanism\n");
break;
#endif
case AUTH_NTLM:
hydra_report(stderr, "[VERBOSE] using NNTP NTLM AUTH mechanism\n");
break;
}
}
usleepn(25);
free(buf);
next_run = 2;
break;
case 2: /* run the cracking function */
next_run = start_nntp(sock, ip, port, options, miscptr, fp);
break;
case 3: /* clean exit */
if (sock >= 0)
sock = hydra_disconnect(sock);
hydra_child_exit(0);
return;
default:
hydra_report(stderr, "[ERROR] Caught unknown return code, exiting!\n");
hydra_child_exit(0);
}
run = next_run;
}
}
int32_t service_nntp_init(char *ip, int32_t sp, unsigned char options, char *miscptr, FILE *fp, int32_t port, char *hostname) {
// called before the childrens are forked off, so this is the function
// which should be filled if initial connections and service setup has to be
// performed once only.
//
// fill if needed.
//
// return codes:
// 0 all OK
// -1 error, hydra will exit, so print a good error message here
return 0;
}
void usage_nntp(const char *service) {
printf("Module nntp is optionally taking one authentication type of:\n"
" USER (default), LOGIN, PLAIN, CRAM-MD5, DIGEST-MD5, NTLM\n\n");
}