1 /* This source code was modified by Martin Hedenfalk <mhe@stacken.kth.se> for
2 * use in Curl. His latest changes were done 2000-09-18.
4 * It has since been patched and modified a lot by Daniel Stenberg
5 * <daniel@haxx.se> to make it better applied to curl conditions, and to make
6 * it not use globals, pollute name space and more. This source code awaits a
7 * rewrite to work around the paragraph 2 in the BSD licenses as explained
10 * Copyright (c) 1998, 1999 Kungliga Tekniska Högskolan
11 * (Royal Institute of Technology, Stockholm, Sweden).
12 * All rights reserved.
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
25 * 3. Neither the name of the Institute nor the names of its contributors
26 * may be used to endorse or promote products derived from this software
27 * without specific prior written permission.
29 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
45 #define _MPRINTF_REPLACE /* we want curl-functions instead of native ones */
46 #include <curl/mprintf.h>
61 /* The last #include file should be: */
66 #define min(a, b) ((a) < (b) ? (a) : (b))
69 enum protection_level level;
72 { prot_clear, "clear" },
73 { prot_safe, "safe" },
74 { prot_confidential, "confidential" },
75 { prot_private, "private" }
78 static enum protection_level
79 name_to_level(const char *name)
82 for(i = 0; i < (int)sizeof(level_names)/(int)sizeof(level_names[0]); i++)
83 if(!strncasecmp(level_names[i].name, name, strlen(name)))
84 return level_names[i].level;
85 return (enum protection_level)-1;
88 static struct Curl_sec_client_mech *mechs[] = {
93 &Curl_krb4_client_mech,
99 Curl_sec_getc(struct connectdata *conn, FILE *F)
101 if(conn->sec_complete && conn->data_prot) {
103 if(Curl_sec_read(conn, fileno(F), &c, 1) <= 0)
112 block_read(int fd, void *buf, size_t len)
114 unsigned char *p = buf;
117 b = read(fd, p, len);
125 return p - (unsigned char*)buf;
129 block_write(int fd, void *buf, size_t len)
131 unsigned char *p = buf;
134 b = write(fd, p, len);
140 return p - (unsigned char*)buf;
144 sec_get_data(struct connectdata *conn,
145 int fd, struct krb4buffer *buf)
150 b = block_read(fd, &len, sizeof(len));
156 buf->data = realloc(buf->data, len);
157 b = block_read(fd, buf->data, len);
162 buf->size = (conn->mech->decode)(conn->app_data, buf->data, len,
163 conn->data_prot, conn);
169 buffer_read(struct krb4buffer *buf, void *data, size_t len)
171 len = min(len, buf->size - buf->index);
172 memcpy(data, (char*)buf->data + buf->index, len);
178 buffer_write(struct krb4buffer *buf, void *data, size_t len)
180 if(buf->index + len > buf->size) {
182 if(buf->data == NULL)
185 tmp = realloc(buf->data, buf->index + len);
189 buf->size = buf->index + len;
191 memcpy((char*)buf->data + buf->index, data, len);
197 Curl_sec_read(struct connectdata *conn, int fd, void *buffer, int length)
202 if(conn->sec_complete == 0 || conn->data_prot == 0)
203 return read(fd, buffer, length);
205 if(conn->in_buffer.eof_flag){
206 conn->in_buffer.eof_flag = 0;
210 len = buffer_read(&conn->in_buffer, buffer, length);
213 buffer = (char*)buffer + len;
216 if(sec_get_data(conn, fd, &conn->in_buffer) < 0)
218 if(conn->in_buffer.size == 0) {
220 conn->in_buffer.eof_flag = 1;
223 len = buffer_read(&conn->in_buffer, buffer, length);
226 buffer = (char*)buffer + len;
232 sec_send(struct connectdata *conn, int fd, char *from, int length)
236 bytes = (conn->mech->encode)(conn->app_data, from, length, conn->data_prot,
238 bytes = htonl(bytes);
239 block_write(fd, &bytes, sizeof(bytes));
240 block_write(fd, buf, ntohl(bytes));
246 Curl_sec_fflush_fd(struct connectdata *conn, int fd)
248 if(conn->data_prot != prot_clear) {
249 if(conn->out_buffer.index > 0){
250 Curl_sec_write(conn, fd,
251 conn->out_buffer.data, conn->out_buffer.index);
252 conn->out_buffer.index = 0;
254 sec_send(conn, fd, NULL, 0);
260 Curl_sec_write(struct connectdata *conn, int fd, char *buffer, int length)
262 int len = conn->buffer_size;
265 if(conn->data_prot == prot_clear)
266 return write(fd, buffer, length);
268 len -= (conn->mech->overhead)(conn->app_data, conn->data_prot, len);
272 sec_send(conn, fd, buffer, len);
281 Curl_sec_vfprintf2(struct connectdata *conn, FILE *f, const char *fmt, va_list ap)
285 if(conn->data_prot == prot_clear)
286 return vfprintf(f, fmt, ap);
288 buf = aprintf(fmt, ap);
289 ret = buffer_write(&conn->out_buffer, buf, strlen(buf));
296 Curl_sec_fprintf2(struct connectdata *conn, FILE *f, const char *fmt, ...)
301 ret = Curl_sec_vfprintf2(conn, f, fmt, ap);
307 Curl_sec_putc(struct connectdata *conn, int c, FILE *F)
310 if(conn->data_prot == prot_clear)
313 buffer_write(&conn->out_buffer, &ch, 1);
314 if(c == '\n' || conn->out_buffer.index >= 1024 /* XXX */) {
315 Curl_sec_write(conn, fileno(F), conn->out_buffer.data, conn->out_buffer.index);
316 conn->out_buffer.index = 0;
322 Curl_sec_read_msg(struct connectdata *conn, char *s, int level)
328 buf = malloc(strlen(s));
329 len = Curl_base64_decode(s + 4, buf); /* XXX */
331 len = (conn->mech->decode)(conn->app_data, buf, len, level, conn);
340 sscanf(buf, "%d", &code);
341 if(buf[len-1] == '\n')
348 /* modified to return how many bytes written, or -1 on error ***/
350 Curl_sec_vfprintf(struct connectdata *conn, FILE *f, const char *fmt, va_list ap)
356 if(!conn->sec_complete)
357 return vfprintf(f, fmt, ap);
359 buf = aprintf(fmt, ap);
360 len = (conn->mech->encode)(conn->app_data, buf, strlen(buf),
361 conn->command_prot, &enc,
365 failf(conn->data, "Failed to encode command.");
368 if(Curl_base64_encode(enc, len, &buf) < 0){
369 failf(conn->data, "Out of memory base64-encoding.");
372 if(conn->command_prot == prot_safe)
373 ret = fprintf(f, "MIC %s", buf);
374 else if(conn->command_prot == prot_private)
375 ret = fprintf(f, "ENC %s", buf);
376 else if(conn->command_prot == prot_confidential)
377 ret = fprintf(f, "CONF %s", buf);
384 Curl_sec_fprintf(struct connectdata *conn, FILE *f, const char *fmt, ...)
389 ret = Curl_sec_vfprintf(conn, f, fmt, ap);
395 enum protection_level
396 Curl_set_command_prot(struct connectdata *conn, enum protection_level level)
398 enum protection_level old = conn->command_prot;
399 conn->command_prot = level;
404 sec_prot_internal(struct connectdata *conn, int level)
407 unsigned int s = 1048576;
410 if(!conn->sec_complete){
411 infof(conn->data, "No security data exchange has taken place.\n");
416 if(Curl_ftpsendf(conn, "PBSZ %u", s))
419 nread = Curl_GetFTPResponse(conn->data->state.buffer, conn, NULL);
423 if(conn->data->state.buffer[0] != '2'){
424 failf(conn->data, "Failed to set protection buffer size.");
427 conn->buffer_size = s;
429 p = strstr(conn->data->state.buffer, "PBSZ=");
431 sscanf(p, "PBSZ=%u", &s);
432 if(s < conn->buffer_size)
433 conn->buffer_size = s;
436 if(Curl_ftpsendf(conn, "PROT %c", level["CSEP"]))
439 nread = Curl_GetFTPResponse(conn->data->state.buffer, conn, NULL);
443 if(conn->data->state.buffer[0] != '2'){
444 failf(conn->data, "Failed to set protection level.");
448 conn->data_prot = (enum protection_level)level;
453 Curl_sec_set_protection_level(struct connectdata *conn)
455 if(conn->sec_complete && conn->data_prot != conn->request_data_prot)
456 sec_prot_internal(conn, conn->request_data_prot);
461 Curl_sec_request_prot(struct connectdata *conn, const char *level)
463 int l = name_to_level(level);
466 conn->request_data_prot = (enum protection_level)l;
471 Curl_sec_login(struct connectdata *conn)
474 struct Curl_sec_client_mech **m;
476 struct SessionHandle *data=conn->data;
479 for(m = mechs; *m && (*m)->name; m++) {
482 tmp = realloc(conn->app_data, (*m)->size);
484 failf (data, "realloc %u failed", (*m)->size);
487 conn->app_data = tmp;
489 if((*m)->init && (*(*m)->init)(conn->app_data) != 0) {
490 infof(data, "Skipping %s...\n", (*m)->name);
493 infof(data, "Trying %s...\n", (*m)->name);
495 if(Curl_ftpsendf(conn, "AUTH %s", (*m)->name))
498 nread = Curl_GetFTPResponse(conn->data->state.buffer, conn, &ftpcode);
502 if(conn->data->state.buffer[0] != '3'){
506 "%s is not supported by the server.\n", (*m)->name);
509 infof(data, "%s rejected as security mechanism.\n", (*m)->name);
512 if(conn->data->state.buffer[0] == '5') {
513 infof(data, "The server doesn't support the FTP "
514 "security extensions.\n");
522 ret = (*(*m)->auth)(conn->app_data, conn);
524 if(ret == AUTH_CONTINUE)
526 else if(ret != AUTH_OK){
527 /* mechanism is supposed to output error string */
531 conn->sec_complete = 1;
532 conn->command_prot = prot_safe;
540 Curl_sec_end(struct connectdata *conn)
542 if (conn->mech != NULL) {
544 (conn->mech->end)(conn->app_data);
545 memset(conn->app_data, 0, conn->mech->size);
546 free(conn->app_data);
547 conn->app_data = NULL;
549 conn->sec_complete = 0;
550 conn->data_prot = (enum protection_level)0;
558 * eval: (load-file "../curl-mode.el")
561 * vim: et sw=2 ts=2 sts=2 tw=78