#include "hydra-mod.h"
#include "sasl.h"
//openssl s_client -starttls pop3 -crlf -connect 192.168.0.10:110
extern int module_auth_type;
extern char *HYDRA_EXIT;
char *buf;
int pop3_auth_mechanism = AUTH_CLEAR;
char apop_challenge[300] = "";
char *pop3_read_server_capacity(int sock) {
char *ptr = NULL;
int resp = 0;
char *buf = NULL;
do {
if (buf != NULL)
free(buf);
ptr = buf = hydra_receive_line(sock);
if (buf != NULL) {
if (strstr(buf, "SASL") != NULL && buf[0] == '+') {
resp = 1;
/* we got the capability info then get the completed warning info from server */
while (hydra_data_ready(sock)) {
free(buf);
buf = hydra_receive_line(sock);
}
} else {
if (buf[strlen(buf) - 1] == '\n')
buf[strlen(buf) - 1] = 0;
if (buf[strlen(buf) - 1] == '\r')
buf[strlen(buf) - 1] = 0;
if (*(ptr) == '.' || *(ptr) == '-')
resp = 1;
}
}
} while (buf != NULL && resp == 0);
return buf;
}
int start_pop3(int s, char *ip, int port, unsigned char options, char *miscptr, FILE * fp) {
char *empty = "\"\"";
char *login, *pass, buffer[500], buffer2[500];
if (strlen(login = hydra_get_next_login()) == 0)
login = empty;
if (strlen(pass = hydra_get_next_password()) == 0)
pass = empty;
while (hydra_data_ready(s) > 0) {
if ((buf = hydra_receive_line(s)) == NULL)
return (1);
free(buf);
}
switch (pop3_auth_mechanism) {
#ifdef LIBOPENSSLNEW
case AUTH_APOP:{
MD5_CTX c;
unsigned char md5_raw[MD5_DIGEST_LENGTH];
MD5_Init(&c);
MD5_Update(&c, apop_challenge, strlen(apop_challenge));
MD5_Update(&c, pass, strlen(pass));
MD5_Final(md5_raw, &c);
int i;
char *pbuffer = buffer2;
for (i = 0; i < MD5_DIGEST_LENGTH; i++) {
sprintf(pbuffer, "%02x", md5_raw[i]);
pbuffer += 2;
}
sprintf(buffer, "APOP %s %s\r\n", login, buffer2);
}
break;
#endif
case AUTH_LOGIN:{
sprintf(buffer, "AUTH 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[0] != '+') {
hydra_report(stderr, "[ERROR] POP3 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[0] != '+') {
hydra_report(stderr, "[ERROR] POP3 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, "AUTH 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[0] != '+') {
hydra_report(stderr, "[ERROR] POP3 PLAIN AUTH : %s\n", buf);
free(buf);
return 3;
}
free(buf);
memset(buffer, 0, sizeof(buffer));
sasl_plain(buffer, login, pass);
sprintf(buffer, "%.250s\r\n", buffer);
}
break;
#ifdef LIBOPENSSLNEW
case AUTH_CRAMMD5:
case AUTH_CRAMSHA1:
case AUTH_CRAMSHA256:{
int rc = 0;
char *preplogin;
rc = sasl_saslprep(login, SASL_ALLOW_UNASSIGNED, &preplogin);
if (rc) {
return 3;
}
switch (pop3_auth_mechanism) {
case AUTH_CRAMMD5:
sprintf(buffer, "AUTH CRAM-MD5\r\n");
break;
case AUTH_CRAMSHA1:
sprintf(buffer, "AUTH CRAM-SHA1\r\n");
break;
case AUTH_CRAMSHA256:
sprintf(buffer, "AUTH CRAM-SHA256\r\n");
break;
}
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[0] != '+') {
switch (pop3_auth_mechanism) {
case AUTH_CRAMMD5:
hydra_report(stderr, "[ERROR] POP3 CRAM-MD5 AUTH : %s\n", buf);
break;
case AUTH_CRAMSHA1:
hydra_report(stderr, "[ERROR] POP3 CRAM-SHA1 AUTH : %s\n", buf);
break;
case AUTH_CRAMSHA256:
hydra_report(stderr, "[ERROR] POP3 CRAM-SHA256 AUTH : %s\n", buf);
break;
}
free(buf);
return 3;
}
memset(buffer, 0, sizeof(buffer));
from64tobits((char *) buffer, buf + 2);
free(buf);
memset(buffer2, 0, sizeof(buffer2));
switch (pop3_auth_mechanism) {
case AUTH_CRAMMD5:{
sasl_cram_md5(buffer2, pass, buffer);
sprintf(buffer, "%s %.250s", preplogin, buffer2);
}
break;
case AUTH_CRAMSHA1:{
sasl_cram_sha1(buffer2, pass, buffer);
sprintf(buffer, "%s %.250s", preplogin, buffer2);
}
break;
case AUTH_CRAMSHA256:{
sasl_cram_sha256(buffer2, pass, buffer);
sprintf(buffer, "%s %.250s", preplogin, buffer2);
}
break;
}
hydra_tobase64((unsigned char *) buffer, strlen(buffer), sizeof(buffer));
sprintf(buffer, "%.250s\r\n", buffer);
free(preplogin);
}
break;
case AUTH_DIGESTMD5:{
sprintf(buffer, "AUTH 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[0] != '+') {
hydra_report(stderr, "[ERROR] POP3 DIGEST-MD5 AUTH : %s\n", buf);
free(buf);
return 3;
}
memset(buffer, 0, sizeof(buffer));
from64tobits((char *) buffer, buf);
free(buf);
if (verbose)
hydra_report(stderr, "[VERBOSE] S: %s\n", buffer);
sasl_digest_md5(buffer2, login, pass, buffer, miscptr, "pop", NULL, 0, NULL);
if (buffer2 == NULL)
return 3;
if (verbose)
hydra_report(stderr, "[VERBOSE] 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 request
sprintf(buffer, "AUTH NTLM\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[0] != '+') {
hydra_report(stderr, "[ERROR] POP3 NTLM AUTH : %s\n", buf);
free(buf);
return 3;
}
free(buf);
//send auth and receive challenge
//send auth request: lst the server send it's own hostname and domainname
buildAuthRequest((tSmbNtlmAuthRequest *) buf2, 0, NULL, NULL);
to64frombits(buf1, buf2, SmbLength((tSmbNtlmAuthRequest *) buf2));
sprintf(buffer, "%s\r\n", buf1);
if (hydra_send(s, buffer, strlen(buffer), 0) < 0)
return 1;
if ((buf = hydra_receive_line(s)) == NULL)
return (1);
//recover challenge
from64tobits((char *) buf1, buf + 2);
free(buf);
//Send response
buildAuthResponse((tSmbNtlmAuthChallenge *) buf1, (tSmbNtlmAuthResponse *) buf2, 0, login, pass, NULL, NULL);
to64frombits(buf1, buf2, SmbLength((tSmbNtlmAuthResponse *) buf2));
sprintf(buffer, "%s\r\n", buf1);
}
break;
default:
sprintf(buffer, "USER %.250s\r\n", login);
if (hydra_send(s, buffer, strlen(buffer), 0) < 0) {
return 1;
}
if ((buf = hydra_receive_line(s)) == NULL)
return (1);
if (buf[0] != '+') {
hydra_report(stderr, "[ERROR] POP3 protocol or service shutdown: %s\n", buf);
free(buf);
return (3);
}
free(buf);
sprintf(buffer, "PASS %.250s\r\n", pass);
}
if (hydra_send(s, buffer, strlen(buffer), 0) < 0) {
return 1;
}
if ((buf = hydra_receive_line(s)) == NULL)
return (1);
if (buf[0] == '+') {
hydra_report_found_host(port, ip, "pop3", fp);
hydra_completed_pair_found();
free(buf);
if (memcmp(hydra_get_next_pair(), &HYDRA_EXIT, sizeof(HYDRA_EXIT)) == 0)
return 3;
return 1;
}
/* special AS/400 hack */
if (strstr(buf, "CPF2204") != NULL || strstr(buf, "CPF22E3") != NULL || strstr(buf, "CPF22E4") != NULL || strstr(buf, "CPF22E5") != NULL) {
hydra_completed_pair_skip();
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_pop3(char *ip, int sp, unsigned char options, char *miscptr, FILE * fp, int port) {
int run = 1, next_run = 1, sock = -1;
int myport = PORT_POP3, mysslport = PORT_POP3_SSL, disable_tls = 0;
char *ptr = NULL;
char *buffer1 = "CAPA\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);
// usleep(300000);
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);
port = myport;
}
if (sock < 0) {
hydra_report(stderr, "[ERROR] Child with pid %d terminating, can not connect\n", (int) getpid());
hydra_child_exit(1);
}
buf = hydra_receive_line(sock);
if (buf == NULL || buf[0] != '+') { /* check the first line */
if (verbose || debug) hydra_report(stderr, "[ERROR] Not an POP3 protocol or service shutdown: %s\n", buf);
hydra_child_exit(2);
}
ptr = strstr(buf, "<");
if (ptr != NULL && buf[0] == '+') {
if (ptr[strlen(ptr) - 1] == '\n')
ptr[strlen(ptr) - 1] = 0;
if (ptr[strlen(ptr) - 1] == '\r')
ptr[strlen(ptr) - 1] = 0;
strcpy(apop_challenge, ptr);
}
free(buf);
/* send capability request */
if (hydra_send(sock, buffer1, strlen(buffer1), 0) < 0)
hydra_child_exit(2);
buf = pop3_read_server_capacity(sock);
if (buf == NULL) {
hydra_child_exit(2);
}
#ifdef LIBOPENSSLNEW
if (!disable_tls) {
/* check for STARTTLS, if available we may have access to more basic auth methods */
if (strstr(buf, "STLS") != NULL) {
hydra_send(sock, "STLS\r\n", strlen("STLS\r\n"), 0);
free(buf);
buf = hydra_receive_line(sock);
if (buf[0] != '+') {
if (verbose)
hydra_report(stderr, "[VERBOSE] TLS negotiation failed\n");
} else {
free(buf);
if ((hydra_connect_to_ssl(sock) == -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);
buf = pop3_read_server_capacity(sock);
if (buf == NULL)
hydra_child_exit(2);
}
}
}
#endif
if ((strstr(buf, "LOGIN") == NULL) && (strstr(buf, "NTLM") != NULL)) {
pop3_auth_mechanism = AUTH_NTLM;
}
#ifdef LIBOPENSSLNEW
if ((strstr(buf, "LOGIN") == NULL) && (strstr(buf, "DIGEST-MD5") != NULL)) {
pop3_auth_mechanism = AUTH_DIGESTMD5;
}
if ((strstr(buf, "LOGIN") == NULL) && (strstr(buf, "CRAM-SHA256") != NULL)) {
pop3_auth_mechanism = AUTH_CRAMSHA256;
}
if ((strstr(buf, "LOGIN") == NULL) && (strstr(buf, "CRAM-SHA1") != NULL)) {
pop3_auth_mechanism = AUTH_CRAMSHA1;
}
if ((strstr(buf, "LOGIN") == NULL) && (strstr(buf, "CRAM-MD5") != NULL)) {
pop3_auth_mechanism = AUTH_CRAMMD5;
}
#endif
if ((strstr(buf, "LOGIN") == NULL) && (strstr(buf, "PLAIN") != NULL)) {
pop3_auth_mechanism = AUTH_PLAIN;
}
if (strstr(buf, "LOGIN") != NULL) {
pop3_auth_mechanism = AUTH_LOGIN;
}
if (strstr(buf, "SASL") == NULL) {
#ifdef LIBOPENSSLNEW
if (strlen(apop_challenge) == 0) {
pop3_auth_mechanism = AUTH_CLEAR;
} else {
pop3_auth_mechanism = AUTH_APOP;
}
#else
pop3_auth_mechanism = AUTH_CLEAR;
#endif
}
free(buf);
if ((miscptr != NULL) && (strlen(miscptr) > 0)) {
int i;
for (i = 0; i < strlen(miscptr); i++)
miscptr[i] = (char) toupper((int) miscptr[i]);
if (strncmp(miscptr, "CLEAR", 5) == 0)
pop3_auth_mechanism = AUTH_CLEAR;
if (strncmp(miscptr, "LOGIN", 5) == 0)
pop3_auth_mechanism = AUTH_LOGIN;
if (strncmp(miscptr, "PLAIN", 5) == 0)
pop3_auth_mechanism = AUTH_PLAIN;
#ifdef LIBOPENSSLNEW
if (strncmp(miscptr, "APOP", 4) == 0)
pop3_auth_mechanism = AUTH_APOP;
if (strncmp(miscptr, "CRAM-MD5", 8) == 0)
pop3_auth_mechanism = AUTH_CRAMMD5;
if (strncmp(miscptr, "CRAM-SHA1", 9) == 0)
pop3_auth_mechanism = AUTH_CRAMSHA1;
if (strncmp(miscptr, "CRAM-SHA256", 11) == 0)
pop3_auth_mechanism = AUTH_CRAMSHA256;
if (strncmp(miscptr, "DIGEST-MD5", 10) == 0)
pop3_auth_mechanism = AUTH_DIGESTMD5;
#endif
if (strncmp(miscptr, "NTLM", 4) == 0)
pop3_auth_mechanism = AUTH_NTLM;
}
if (verbose) {
switch (pop3_auth_mechanism) {
case AUTH_CLEAR:
hydra_report(stderr, "[VERBOSE] using POP3 CLEAR LOGIN mechanism\n");
break;
case AUTH_LOGIN:
hydra_report(stderr, "[VERBOSE] using POP3 LOGIN AUTH mechanism\n");
break;
case AUTH_PLAIN:
hydra_report(stderr, "[VERBOSE] using POP3 PLAIN AUTH mechanism\n");
break;
case AUTH_APOP:
#ifdef LIBOPENSSLNEW
if (strlen(apop_challenge) == 0) {
hydra_report(stderr, "[VERBOSE] APOP not supported by server, using clear login\n");
pop3_auth_mechanism = AUTH_CLEAR;
} else {
hydra_report(stderr, "[VERBOSE] using POP3 APOP AUTH mechanism\n");
}
#else
pop3_auth_mechanism = AUTH_CLEAR;
#endif
break;
#ifdef LIBOPENSSLNEW
case AUTH_CRAMMD5:
hydra_report(stderr, "[VERBOSE] using POP3 CRAM-MD5 AUTH mechanism\n");
break;
case AUTH_CRAMSHA1:
hydra_report(stderr, "[VERBOSE] using POP3 CRAM-SHA1 AUTH mechanism\n");
break;
case AUTH_CRAMSHA256:
hydra_report(stderr, "[VERBOSE] using POP3 CRAM-SHA256 AUTH mechanism\n");
break;
case AUTH_DIGESTMD5:
hydra_report(stderr, "[VERBOSE] using POP3 DIGEST-MD5 AUTH mechanism\n");
break;
#endif
case AUTH_NTLM:
hydra_report(stderr, "[VERBOSE] using POP3 NTLM AUTH mechanism\n");
break;
}
}
next_run = 2;
break;
case 2: /* run the cracking function */
next_run = start_pop3(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;
}
}