| 43 |
|
|
| 44 |
/*** |
/*** |
| 45 |
ftp_connect: |
ftp_connect: |
| 46 |
- char *host => HostName/IP |
- char *host => HostName/IP |
| 47 |
- int port => Port to connect to |
- int port => Port to connect to |
| 48 |
- struct sockaddr_in * => pointer to sockaddr_in structure |
- struct sockaddr_in * => pointer to sockaddr_in structure |
| 49 |
- int verbose => Verbose? |
- int verbose => Verbose? |
| 50 |
. 0 Do not Print |
. 0 Do not Print |
| 51 |
. 1 Print |
. 1 Print |
| 52 |
- ret => Success? |
- ret => Success? |
| 53 |
. sock Socket Descriptor Returned |
. sock Socket Descriptor Returned |
| 54 |
.-1 Error |
.-1 Error |
| 55 |
***/ |
***/ |
| 56 |
|
|
| 57 |
|
|
| 58 |
|
|
| 59 |
int ftp_auth(int sck, char *usr, char *pwd, int verbose) { |
int ftp_auth(int sck, char *usr, char *pwd, int verbose) |
| 60 |
|
{ |
| 61 |
|
char *auth; |
| 62 |
|
char buf[1024]={'\0'}; |
| 63 |
|
int n = 0; |
| 64 |
|
struct timeval tm; //tv_sec - tv_usec |
| 65 |
|
fd_set readfds; |
| 66 |
|
|
| 67 |
if (strlen(usr) > 50) { |
|
| 68 |
|
if (strlen(usr) > 50) { |
| 69 |
|
|
| 70 |
return USR_TOO_LONG; |
return USR_TOO_LONG; |
| 71 |
|
|
| 72 |
} |
} |
| 73 |
|
|
| 74 |
char *auth = malloc(strlen("USER ")+strlen(usr)+2); |
auth = malloc(strlen("USER ")+strlen(usr)+2); |
|
char buf[1024]={'\0'}; |
|
|
int n = 0; |
|
| 75 |
|
|
| 76 |
sprintf(auth, "%s %s\n", "USER", usr); |
sprintf(auth, "%s %s\n", "USER", usr); |
| 77 |
|
|
| 78 |
if (write(sck, auth, strlen(auth)) == -1) { |
if (write(sck, auth, strlen(auth)) == -1) { |
| 79 |
|
|
| 80 |
if (verbose) { |
if (verbose) { |
| 81 |
|
|
| 82 |
if (errno == EBADF) { |
if (errno == EBADF) { |
| 83 |
|
|
| 84 |
fprintf(stderr, "Socket Descriptor Not Valid!\n"); |
fprintf(stderr, "Socket Descriptor Not Valid!\n"); |
| 85 |
free(auth); |
free(auth); |
| 86 |
return -1; |
return -1; |
| 87 |
} else if (errno == EIO) { |
} else if (errno == EIO) { |
| 88 |
|
|
| 89 |
fprintf(stderr, "I/O Error!\n"); |
fprintf(stderr, "I/O Error!\n"); |
| 90 |
free(auth); |
free(auth); |
| 91 |
|
|
| 92 |
return -1; |
return -1; |
| 93 |
} else if (errno == EINTR) { |
} else if (errno == EINTR) { |
| 94 |
|
|
| 95 |
fprintf(stderr, "Signal Interrupted The write() Function\n"); |
fprintf(stderr, "Signal Interrupted The write() Function\n"); |
| 96 |
free(auth); |
free(auth); |
| 97 |
return -1; |
return -1; |
| 98 |
} |
} |
| 99 |
|
|
| 100 |
} else { |
} else { |
| 101 |
|
|
| 102 |
if (errno == EBADF) { |
if (errno == EBADF) { |
| 103 |
free(auth); |
free(auth); |
| 104 |
return -1; |
return -1; |
| 105 |
} else if (errno == EIO) { |
} else if (errno == EIO) { |
| 106 |
free(auth); |
free(auth); |
| 107 |
|
|
| 108 |
return -1; |
return -1; |
| 109 |
} else if (errno == EINTR) { |
} else if (errno == EINTR) { |
| 110 |
free(auth); |
free(auth); |
| 111 |
return -1; |
return -1; |
| 112 |
} |
} |
| 113 |
|
|
| 114 |
} |
} |
| 115 |
|
|
| 116 |
free(auth); |
free(auth); |
| 117 |
|
|
| 118 |
return -1; |
return -1; |
| 119 |
|
|
| 120 |
} |
} |
| 121 |
|
|
| 122 |
free(auth); |
free(auth); |
| 123 |
|
|
| 124 |
buf[1023] = '\0'; |
buf[1023] = '\0'; |
| 125 |
|
|
| 126 |
struct timeval tm; //tv_sec - tv_usec |
tm.tv_sec = 3; |
| 127 |
fd_set readfds; |
tm.tv_usec = 0; |
|
tm.tv_sec = 3; |
|
|
tm.tv_usec = 0; |
|
| 128 |
|
|
| 129 |
FD_ZERO(&readfds); |
FD_ZERO(&readfds); |
| 130 |
|
|
| 131 |
FD_SET(sck, &readfds); |
FD_SET(sck, &readfds); |
| 132 |
sleep(1); //wait a little bit |
sleep(1); //wait a little bit |
| 133 |
|
|
| 134 |
if (select(sck+1, &readfds, NULL, NULL, &tm) < 0 ) { |
if (select(sck+1, &readfds, NULL, NULL, &tm) < 0 ) { |
| 135 |
|
if (verbose) { |
| 136 |
|
perror("select()"); |
| 137 |
|
} |
| 138 |
|
return -1; |
| 139 |
|
} else { |
| 140 |
|
|
| 141 |
|
if (FD_ISSET(sck, &readfds)) { |
| 142 |
|
|
| 143 |
|
if ( (n = recv(sck, buf, 1022, 0)) < 0) { |
| 144 |
if (verbose) { |
if (verbose) { |
| 145 |
perror("select()"); |
perror("recv()"); |
| 146 |
} |
} |
| 147 |
return -1; |
return -1; |
| 148 |
} else { |
} |
| 149 |
|
|
| 150 |
if (FD_ISSET(sck, &readfds)) { |
if (verbose) |
| 151 |
|
printf("[Server] %s\n", buf); |
|
if ( (n = recv(sck, buf, 1022, 0)) < 0) { |
|
|
if (verbose) { |
|
|
perror("recv()"); |
|
|
} |
|
|
return -1; |
|
|
} |
|
|
|
|
|
if (verbose) |
|
|
printf("[Server] %s\n", buf); |
|
| 152 |
|
|
| 153 |
} |
} |
| 154 |
else { |
else { |
| 155 |
if (verbose) |
if (verbose) |
| 156 |
printf("[-] Timeout\n"); |
printf("[-] Timeout\n"); |
| 157 |
|
|
| 158 |
return -1; |
return -1; |
|
} |
|
| 159 |
} |
} |
| 160 |
|
} |
| 161 |
|
|
| 162 |
buf[n] = '\0'; |
buf[n] = '\0'; |
| 163 |
|
|
| 164 |
if (ftp_login_handler(buf, 0) != 2) { //2? Yes.. Need a Password |
if (ftp_login_handler(buf, 0) != 2) { //2? Yes.. Need a Password |
| 165 |
return -1; |
return -1; |
| 166 |
} |
} |
| 167 |
|
|
| 168 |
memset(buf, 0x0, 1024); |
memset(buf, 0x0, 1024); |
| 169 |
|
|
| 170 |
if (strlen(pwd) > 50) { |
if (strlen(pwd) > 50) { |
| 171 |
|
|
| 172 |
return PWD_TOO_LONG; |
return PWD_TOO_LONG; |
| 173 |
|
|
| 174 |
} |
} |
| 175 |
|
|
| 176 |
auth = malloc(strlen("PASS ")+strlen(pwd)+2); |
auth = malloc(strlen("PASS ")+strlen(pwd)+2); |
| 177 |
|
|
| 178 |
sprintf(auth, "%s %s\n", "PASS", pwd); |
sprintf(auth, "%s %s\n", "PASS", pwd); |
| 179 |
|
|
| 180 |
if (write(sck, auth, strlen(auth)) == -1) { |
if (write(sck, auth, strlen(auth)) == -1) { |
| 181 |
|
|
| 182 |
if (verbose) { |
if (verbose) { |
| 183 |
if (errno == EBADF) { |
if (errno == EBADF) { |
| 184 |
fprintf(stderr, "Socket Descriptor Not Valid!\n"); |
fprintf(stderr, "Socket Descriptor Not Valid!\n"); |
| 185 |
free(auth); |
free(auth); |
| 186 |
|
|
| 187 |
return -1; |
return -1; |
| 188 |
|
|
| 189 |
} else if (errno == EIO) { |
} else if (errno == EIO) { |
| 190 |
|
|
| 191 |
fprintf(stderr, "I/O Error!\n"); |
fprintf(stderr, "I/O Error!\n"); |
| 192 |
free(auth); |
free(auth); |
| 193 |
|
|
| 194 |
return -1; |
return -1; |
| 195 |
|
|
| 196 |
} else if (errno == EINTR) { |
} else if (errno == EINTR) { |
| 197 |
|
|
| 198 |
fprintf(stderr, "Signal Interrupted The write() Function\n"); |
fprintf(stderr, "Signal Interrupted The write() Function\n"); |
| 199 |
free(auth); |
free(auth); |
| 200 |
|
|
| 201 |
return -1; |
return -1; |
| 202 |
} |
} |
| 203 |
|
|
| 204 |
} else { |
} else { |
| 205 |
|
|
| 206 |
if (errno == EBADF) { |
if (errno == EBADF) { |
| 207 |
free(auth); |
free(auth); |
| 208 |
|
|
| 209 |
return -1; |
return -1; |
| 210 |
|
|
| 211 |
} else if (errno == EIO) { |
} else if (errno == EIO) { |
| 212 |
free(auth); |
free(auth); |
| 213 |
|
|
| 214 |
return -1; |
return -1; |
| 215 |
|
|
| 216 |
} else if (errno == EINTR) { |
} else if (errno == EINTR) { |
| 217 |
free(auth); |
free(auth); |
| 218 |
|
|
| 219 |
return -1; |
return -1; |
| 220 |
} |
} |
| 221 |
|
|
| 222 |
} |
} |
| 223 |
|
|
| 224 |
free(auth); |
free(auth); |
| 225 |
|
|
| 226 |
return -1; |
return -1; |
| 227 |
|
|
| 228 |
} |
} |
| 229 |
|
|
| 230 |
pwd_len = strlen(pwd) - 1; |
pwd_len = strlen(pwd) - 1; |
| 231 |
|
|
| 232 |
free(auth); |
free(auth); |
| 233 |
|
|
| 234 |
|
|
| 235 |
FD_ZERO(&readfds); |
FD_ZERO(&readfds); |
| 236 |
|
|
| 237 |
FD_SET(sck, &readfds); |
FD_SET(sck, &readfds); |
| 238 |
|
|
| 239 |
sleep(1); |
sleep(1); |
| 240 |
|
|
| 241 |
if (select(sck+1, &readfds, NULL, NULL, &tm) < 0 ) { |
if (select(sck+1, &readfds, NULL, NULL, &tm) < 0 ) { |
| 242 |
|
if (verbose) { |
| 243 |
|
perror("select()"); |
| 244 |
|
} |
| 245 |
|
return -1; |
| 246 |
|
} else { |
| 247 |
|
|
| 248 |
|
if (FD_ISSET(sck, &readfds)) { |
| 249 |
|
|
| 250 |
|
if ( (n= recv(sck, buf, 1022, 0)) < 0) { |
| 251 |
if (verbose) { |
if (verbose) { |
| 252 |
perror("select()"); |
perror("recv()"); |
| 253 |
} |
} |
| 254 |
return -1; |
return -1; |
| 255 |
} else { |
} |
| 256 |
|
buf[n] = '\0'; |
|
if (FD_ISSET(sck, &readfds)) { |
|
| 257 |
|
|
| 258 |
if ( (n= recv(sck, buf, 1022, 0)) < 0) { |
if (verbose) |
| 259 |
if (verbose) { |
printf("[Server] %s\n", buf); |
|
perror("recv()"); |
|
|
} |
|
|
return -1; |
|
|
} |
|
|
buf[n] = '\0'; |
|
|
|
|
|
if (verbose) |
|
|
printf("[Server] %s\n", buf); |
|
| 260 |
|
|
| 261 |
} |
} |
| 262 |
else { |
else { |
| 263 |
if (verbose) |
if (verbose) |
| 264 |
printf("[-] Timeout\n"); |
printf("[-] Timeout\n"); |
| 265 |
|
|
| 266 |
return -1; |
return -1; |
|
} |
|
| 267 |
} |
} |
| 268 |
|
} |
| 269 |
|
|
| 270 |
if (ftp_login_handler(buf, 0) != 0) { |
if (ftp_login_handler(buf, 0) != 0) { |
| 271 |
|
|
| 272 |
return -1; |
return -1; |
| 273 |
} |
} |
| 274 |
|
|
| 275 |
memset(buf, 0x0, 1024); |
memset(buf, 0x0, 1024); |
| 276 |
|
|
| 277 |
return 0; |
return 0; |
| 278 |
|
|
| 279 |
} |
} |