thc-hydra/hydra-imap.c
2020-02-17 11:16:51 +01:00

599 lines
19 KiB
C

#include "hydra-mod.h"
#include "sasl.h"
extern char *HYDRA_EXIT;
char *buf;
int32_t counter;
int32_t imap_auth_mechanism = AUTH_CLEAR;
char *imap_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 (strstr(buf, "CAPABILITY") != NULL && buf[0] == '*') {
resp = 1;
usleepn(300);
/* 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 (isdigit((int32_t)*ptr) && *(ptr + 1) == ' ') {
resp = 1;
}
}
}
} while (buf != NULL && resp == 0);
return buf;
}
int32_t start_imap(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;
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)) {
if ((buf = hydra_receive_line(s)) == NULL)
return (1);
free(buf);
}
switch (imap_auth_mechanism) {
case AUTH_LOGIN:
sprintf(buffer, "%d AUTHENTICATE LOGIN\r\n", counter);
if (hydra_send(s, buffer, strlen(buffer), 0) < 0) {
return 1;
}
if ((buf = hydra_receive_line(s)) == NULL)
return 1;
if (strstr(buf, " NO ") != NULL || strstr(buf, "failed") != NULL || strstr(buf, " BAD ") != NULL) {
hydra_report(stderr, "[ERROR] IMAP 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 (strstr(buf, " NO ") != NULL || strstr(buf, "failed") != NULL || strstr(buf, " BAD ") != NULL) {
hydra_report(stderr, "[ERROR] IMAP 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, "%d AUTHENTICATE PLAIN\r\n", counter);
if (hydra_send(s, buffer, strlen(buffer), 0) < 0) {
return 1;
}
if ((buf = hydra_receive_line(s)) == NULL)
return 1;
if (strstr(buf, " NO ") != NULL || strstr(buf, "failed") != NULL || strstr(buf, " BAD ") != NULL) {
hydra_report(stderr, "[ERROR] IMAP PLAIN AUTH : %s\n", buf);
free(buf);
return 3;
}
free(buf);
memset(buffer2, 0, sizeof(buffer2));
result = sasl_plain(buffer2, login, pass);
if (result == NULL)
return 3;
sprintf(buffer, "%.250s\r\n", buffer2);
break;
#ifdef LIBOPENSSL
case AUTH_CRAMMD5:
case AUTH_CRAMSHA1:
case AUTH_CRAMSHA256: {
int32_t rc = 0;
char *preplogin;
rc = sasl_saslprep(login, SASL_ALLOW_UNASSIGNED, &preplogin);
if (rc) {
return 3;
}
switch (imap_auth_mechanism) {
case AUTH_CRAMMD5:
sprintf(buffer, "%d AUTHENTICATE CRAM-MD5\r\n", counter);
break;
case AUTH_CRAMSHA1:
sprintf(buffer, "%d AUTHENTICATE CRAM-SHA1\r\n", counter);
break;
case AUTH_CRAMSHA256:
sprintf(buffer, "%d AUTHENTICATE CRAM-SHA256\r\n", counter);
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 (strstr(buf, " NO ") != NULL || strstr(buf, "failed") != NULL || strstr(buf, " BAD ") != NULL || strstr(buf, "BYE") != NULL) {
switch (imap_auth_mechanism) {
case AUTH_CRAMMD5:
hydra_report(stderr, "[ERROR] IMAP CRAM-MD5 AUTH : %s\n", buf);
break;
case AUTH_CRAMSHA1:
hydra_report(stderr, "[ERROR] IMAP CRAM-SHA1 AUTH : %s\n", buf);
break;
case AUTH_CRAMSHA256:
hydra_report(stderr, "[ERROR] IMAP 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 (imap_auth_mechanism) {
case AUTH_CRAMMD5: {
result = sasl_cram_md5(buffer2, pass, buffer);
if (result == NULL)
return 3;
sprintf(buffer, "%s %.250s", preplogin, buffer2);
} break;
case AUTH_CRAMSHA1: {
result = sasl_cram_sha1(buffer2, pass, buffer);
if (result == NULL)
return 3;
sprintf(buffer, "%s %.250s", preplogin, buffer2);
} break;
case AUTH_CRAMSHA256: {
result = sasl_cram_sha256(buffer2, pass, buffer);
if (result == NULL)
return 3;
sprintf(buffer, "%s %.250s", preplogin, buffer2);
} break;
}
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, "%d AUTHENTICATE DIGEST-MD5\r\n", counter);
if (hydra_send(s, buffer, strlen(buffer), 0) < 0)
return 1;
// receive
if ((buf = hydra_receive_line(s)) == NULL)
return 1;
if (strstr(buf, " NO ") != NULL || strstr(buf, "failed") != NULL || strstr(buf, " BAD ") != NULL || strstr(buf, "BYE") != NULL) {
hydra_report(stderr, "[ERROR] IMAP DIGEST-MD5 AUTH : %s\n", buf);
free(buf);
return 3;
}
memset(buffer, 0, sizeof(buffer));
from64tobits((char *)buffer, buf);
free(buf);
if (debug)
hydra_report(stderr, "DEBUG S: %s\n", buffer);
fooptr = buffer2;
result = sasl_digest_md5(fooptr, login, pass, buffer, miscptr, "imap", 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;
case AUTH_SCRAMSHA1: {
char clientfirstmessagebare[200];
char serverfirstmessage[200];
char *preplogin;
int32_t rc = sasl_saslprep(login, SASL_ALLOW_UNASSIGNED, &preplogin);
if (rc) {
return 3;
}
sprintf(buffer, "%d AUTHENTICATE SCRAM-SHA-1\r\n", counter);
if (hydra_send(s, buffer, strlen(buffer), 0) < 0) {
return 1;
}
if ((buf = hydra_receive_line(s)) == NULL)
return 1;
if (strstr(buf, " NO ") != NULL || strstr(buf, "failed") != NULL || strstr(buf, " BAD ") != NULL || strstr(buf, "BYE") != NULL) {
hydra_report(stderr, "[ERROR] IMAP SCRAM-SHA1 AUTH : %s\n", buf);
free(buf);
return 3;
}
free(buf);
snprintf(clientfirstmessagebare, sizeof(clientfirstmessagebare), "n=%s,r=hydra", preplogin);
free(preplogin);
memset(buffer2, 0, sizeof(buffer2));
sprintf(buffer2, "n,,%.200s", clientfirstmessagebare);
hydra_tobase64((unsigned char *)buffer2, strlen(buffer2), sizeof(buffer2));
snprintf(buffer, sizeof(buffer), "%s\r\n", buffer2);
if (hydra_send(s, buffer, strlen(buffer), 0) < 0) {
return 1;
}
buf = hydra_receive_line(s);
if (buf == NULL)
return 1;
if (strstr(buf, " NO ") != NULL || strstr(buf, "failed") != NULL || strstr(buf, " BAD ") != NULL || strstr(buf, "BYE") != NULL) {
if (verbose || debug)
hydra_report(stderr, "[ERROR] Not a valid server challenge\n");
free(buf);
return 1;
} else {
/* recover server challenge */
memset(buffer, 0, sizeof(buffer));
//+ cj1oeWRyYU9VNVZqcHQ5RjNqcmVXRVFWTCxzPWhGbTNnRGw0akdidzJVVHosaT00MDk2
from64tobits((char *)buffer, buf + 2);
free(buf);
strncpy(serverfirstmessage, buffer, sizeof(serverfirstmessage) - 1);
serverfirstmessage[sizeof(serverfirstmessage) - 1] = '\0';
memset(buffer2, 0, sizeof(buffer2));
fooptr = buffer2;
result = sasl_scram_sha1(fooptr, pass, clientfirstmessagebare, serverfirstmessage);
if (result == NULL) {
hydra_report(stderr, "[ERROR] Can't compute client response\n");
return 1;
}
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, "%d AUTHENTICATE NTLM\r\n", counter);
if (hydra_send(s, buffer, strlen(buffer), 0) < 0)
return 1;
// receive
if ((buf = hydra_receive_line(s)) == NULL)
return 1;
if (strstr(buf, " NO ") != NULL || strstr(buf, "failed") != NULL || strstr(buf, " BAD ") != NULL || strstr(buf, "BYE") != NULL) {
hydra_report(stderr, "[ERROR] IMAP 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;
if (strlen(buf) < 6) {
free(buf);
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:
// clear authentication
sprintf(buffer, "%d LOGIN \"%.100s\" \"%.100s\"\r\n", counter, login, pass);
}
if (hydra_send(s, buffer, strlen(buffer), 0) < 0) {
return 1;
}
if ((buf = hydra_receive_line(s)) == NULL)
return (1);
if (strstr(buf, " NO ") != NULL || strstr(buf, "failed") != NULL || strstr(buf, " BAD ") != NULL || strstr(buf, "BYE") != NULL) {
if (verbose)
hydra_report(stderr, "[ERROR] %s\n", buf);
free(buf);
hydra_completed_pair();
if (memcmp(hydra_get_next_pair(), &HYDRA_EXIT, sizeof(HYDRA_EXIT)) == 0)
return 3;
if (counter == 4)
return 1;
return (2);
}
free(buf);
hydra_report_found_host(port, ip, "imap", fp);
hydra_completed_pair_found();
if (memcmp(hydra_get_next_pair(), &HYDRA_EXIT, sizeof(HYDRA_EXIT)) == 0)
return 3;
return 1;
}
void service_imap(char *ip, int32_t sp, unsigned char options, char *miscptr, FILE *fp, int32_t port, char *hostname) {
int32_t run = 1, next_run = 1, sock = -1;
int32_t myport = PORT_IMAP, mysslport = PORT_IMAP_SSL, disable_tls = 1;
char *buffer1 = "1 CAPABILITY\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(275);
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);
}
buf = hydra_receive_line(sock);
if ((buf == NULL) || (strstr(buf, "OK") == NULL && buf[0] != '*')) { /* check the first line */
if (verbose || debug)
hydra_report(stderr, "[ERROR] Not an IMAP protocol or service shutdown:\n");
if (buf != NULL)
free(buf);
hydra_child_exit(2);
}
free(buf);
/* send capability request */
if (hydra_send(sock, buffer1, strlen(buffer1), 0) < 0)
exit(-1);
counter = 2;
buf = imap_read_server_capacity(sock);
if (buf == NULL) {
hydra_child_exit(2);
}
if ((miscptr != NULL) && (strlen(miscptr) > 0)) {
int32_t i;
for (i = 0; i < strlen(miscptr); i++)
miscptr[i] = (char)toupper((int32_t)miscptr[i]);
if (strstr(miscptr, "TLS") || strstr(miscptr, "SSL") || strstr(miscptr, "STARTTLS")) {
disable_tls = 0;
}
}
#ifdef LIBOPENSSL
if (!disable_tls) {
/* check for STARTTLS, if available we may have access to more basic
* auth methods */
if (strstr(buf, "STARTTLS") != NULL) {
hydra_send(sock, "2 STARTTLS\r\n", strlen("2 STARTTLS\r\n"), 0);
counter++;
free(buf);
buf = hydra_receive_line(sock);
if (buf == NULL || (strstr(buf, " NO ") != NULL || strstr(buf, "failed") != NULL || strstr(buf, " BAD ") != NULL)) {
hydra_report(stderr, "[ERROR] TLS negotiation failed, no answer "
"received from STARTTLS request\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, "3 CAPABILITY\r\n", strlen("3 CAPABILITY\r\n"), 0) < 0)
hydra_child_exit(2);
buf = imap_read_server_capacity(sock);
counter++;
if (buf == NULL)
hydra_child_exit(2);
}
} else
hydra_report(stderr, "[ERROR] option to use TLS/SSL failed as it is "
"not supported by the server\n");
}
#endif
if (verbose)
hydra_report(stderr, "[VERBOSE] CAPABILITY: %s", buf);
// authentication should be listed AUTH= like in the extract below
// STARTTLS LOGINDISABLED AUTH=GSSAPI AUTH=DIGEST-MD5 AUTH=CRAM-MD5
if ((strstr(buf, "=LOGIN") == NULL) && (strstr(buf, "=NTLM") != NULL)) {
imap_auth_mechanism = AUTH_NTLM;
}
#ifdef LIBOPENSSL
if ((strstr(buf, "=LOGIN") == NULL) && (strstr(buf, "=SCRAM-SHA-1") != NULL)) {
imap_auth_mechanism = AUTH_SCRAMSHA1;
}
if ((strstr(buf, "=LOGIN") == NULL) && (strstr(buf, "=DIGEST-MD5") != NULL)) {
imap_auth_mechanism = AUTH_DIGESTMD5;
}
if ((strstr(buf, "=LOGIN") == NULL) && (strstr(buf, "=CRAM-SHA256") != NULL)) {
imap_auth_mechanism = AUTH_CRAMSHA256;
}
if ((strstr(buf, "=LOGIN") == NULL) && (strstr(buf, "=CRAM-SHA1") != NULL)) {
imap_auth_mechanism = AUTH_CRAMSHA1;
}
if ((strstr(buf, "=LOGIN") == NULL) && (strstr(buf, "=CRAM-MD5") != NULL)) {
imap_auth_mechanism = AUTH_CRAMMD5;
}
#endif
if ((strstr(buf, "=LOGIN") == NULL) && (strstr(buf, "=PLAIN") != NULL)) {
imap_auth_mechanism = AUTH_PLAIN;
}
if (strstr(buf, "=LOGIN") != NULL) {
imap_auth_mechanism = AUTH_LOGIN;
}
free(buf);
if ((miscptr != NULL) && (strlen(miscptr) > 0)) {
if (strstr(miscptr, "CLEAR"))
imap_auth_mechanism = AUTH_CLEAR;
if (strstr(miscptr, "LOGIN"))
imap_auth_mechanism = AUTH_LOGIN;
if (strstr(miscptr, "PLAIN"))
imap_auth_mechanism = AUTH_PLAIN;
#ifdef LIBOPENSSL
if (strstr(miscptr, "CRAM-MD5"))
imap_auth_mechanism = AUTH_CRAMMD5;
if (strstr(miscptr, "CRAM-SHA1"))
imap_auth_mechanism = AUTH_CRAMSHA1;
if (strstr(miscptr, "CRAM-SHA256"))
imap_auth_mechanism = AUTH_CRAMSHA256;
if (strstr(miscptr, "DIGEST-MD5"))
imap_auth_mechanism = AUTH_DIGESTMD5;
if (strstr(miscptr, "SCRAM-SHA1"))
imap_auth_mechanism = AUTH_SCRAMSHA1;
#endif
if (strstr(miscptr, "NTLM"))
imap_auth_mechanism = AUTH_NTLM;
}
if (verbose) {
switch (imap_auth_mechanism) {
case AUTH_CLEAR:
hydra_report(stderr, "[VERBOSE] using IMAP CLEAR LOGIN mechanism\n");
break;
case AUTH_LOGIN:
hydra_report(stderr, "[VERBOSE] using IMAP LOGIN AUTH mechanism\n");
break;
case AUTH_PLAIN:
hydra_report(stderr, "[VERBOSE] using IMAP PLAIN AUTH mechanism\n");
break;
#ifdef LIBOPENSSL
case AUTH_CRAMMD5:
hydra_report(stderr, "[VERBOSE] using IMAP CRAM-MD5 AUTH mechanism\n");
break;
case AUTH_CRAMSHA1:
hydra_report(stderr, "[VERBOSE] using IMAP CRAM-SHA1 AUTH mechanism\n");
break;
case AUTH_CRAMSHA256:
hydra_report(stderr, "[VERBOSE] using IMAP CRAM-SHA256 AUTH mechanism\n");
break;
case AUTH_DIGESTMD5:
hydra_report(stderr, "[VERBOSE] using IMAP DIGEST-MD5 AUTH mechanism\n");
break;
case AUTH_SCRAMSHA1:
hydra_report(stderr, "[VERBOSE] using IMAP SCRAM-SHA1 AUTH mechanism\n");
break;
#endif
case AUTH_NTLM:
hydra_report(stderr, "[VERBOSE] using IMAP NTLM AUTH mechanism\n");
break;
}
}
next_run = 2;
break;
case 2: /* run the cracking function */
next_run = start_imap(sock, ip, port, options, miscptr, fp);
counter++;
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(2);
}
run = next_run;
}
}
int32_t service_imap_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_imap(const char *service) {
printf("Module imap is optionally taking one authentication type of:\n"
" CLEAR or APOP (default), LOGIN, PLAIN, CRAM-MD5, CRAM-SHA1,\n"
" CRAM-SHA256, DIGEST-MD5, NTLM\n"
"Additionally TLS encryption via STARTTLS can be enforced with the "
"TLS option.\n\n"
"Example: imap://target/TLS:PLAIN\n");
}