Annotation of libwww/Library/src/HTAABrow.c, revision 2.45
2.15 frystyk 1: /* HTAABrow.c
2.32 frystyk 2: ** BROWSER SIDE ACCESS AUTHORIZATION MODULE
2.15 frystyk 3: **
2.19 frystyk 4: ** (c) COPYRIGHT MIT 1995.
2.15 frystyk 5: ** Please first read the full copyright statement in the file COPYRIGH.
2.45 ! frystyk 6: ** @(#) $Id: HTAABrow.c,v 2.44 1996/09/08 22:08:02 frystyk Exp $
2.1 luotonen 7: **
2.32 frystyk 8: ** Contains code for parsing challenges and creating credentials for
2.36 frystyk 9: ** basic authentication schemes. See also the HTAAUtil module
2.32 frystyk 10: ** for how to handle other authentication schemes. You don't have to use
11: ** this code at all.
2.1 luotonen 12: **
13: ** AUTHORS:
14: ** AL Ari Luotonen luotonen@dxcern.cern.ch
2.32 frystyk 15: ** HFN Henrik Frystyk
2.1 luotonen 16: **
17: ** HISTORY:
2.5 luotonen 18: ** Oct 17 AL Made corrections suggested by marca:
19: ** Added if (!realm->username) return NULL;
20: ** Changed some ""s to NULLs.
2.33 frystyk 21: ** Now doing HT_CALLOC() to init uuencode source;
2.5 luotonen 22: ** otherwise HTUU_encode() reads uninitialized memory
23: ** every now and then (not a real bug but not pretty).
24: ** Corrected the formula for uuencode destination size.
2.32 frystyk 25: ** Feb 96 HFN Rewritten to make it scheme independent and based on
26: ** callback functions and an info structure
2.1 luotonen 27: */
28:
2.17 frystyk 29: /* Library include files */
2.27 frystyk 30: #include "WWWLib.h"
31: #include "HTAAUtil.h"
32: #include "HTAABrow.h" /* Implemented here */
2.1 luotonen 33:
2.36 frystyk 34: #define BASIC_AUTH "basic"
2.44 frystyk 35: #define DIGEST_AUTH "digest"
2.36 frystyk 36:
2.32 frystyk 37: typedef struct _HTBasic { /* Basic challenge and credentials */
38: char * uid;
39: char * pw;
2.38 frystyk 40: BOOL retry; /* Should we ask the user again? */
2.40 frystyk 41: BOOL proxy; /* Proxy authentication */
2.32 frystyk 42: } HTBasic;
43:
2.44 frystyk 44: typedef struct _HTDigest { /* Digest challenge and credentials */
45: char * uid;
46: char * pw;
47: char * nounce;
48: char * opaque;
49: BOOL stale;
50: BOOL retry; /* Should we ask the user again? */
51: BOOL proxy; /* Proxy authentication */
52: int references; /* Number of pointers to this object */
53: } HTDigest;
54:
2.36 frystyk 55: /* ------------------------------------------------------------------------- */
56:
2.32 frystyk 57: /*
58: ** Create a protection template for the files
59: ** in the same directory as the given file
60: ** Returns a template matching docname, and other files in that directory.
61: **
62: ** E.g. /foo/bar/x.html => /foo/bar/ *
63: ** ^
64: ** Space only to prevent it from
65: ** being a comment marker here,
66: ** there really isn't any space.
2.1 luotonen 67: */
2.33 frystyk 68: PRIVATE char * make_template (const char * docname)
2.1 luotonen 69: {
2.39 frystyk 70: char * tmplate = NULL;
2.32 frystyk 71: if (docname) {
2.39 frystyk 72: char * host = HTParse(docname, "", PARSE_ACCESS|PARSE_HOST|PARSE_PUNCTUATION);
73: char * path = HTParse(docname, "", PARSE_PATH|PARSE_PUNCTUATION);
74: char * slash = strrchr(path, '/');
75: if (slash) {
76: if (*(slash+1)) {
77: strcpy(slash, "*");
78: StrAllocCat(host, path);
79: } else
2.43 frystyk 80: StrAllocCat(host, "/*");
2.39 frystyk 81: }
82: HT_FREE(path);
83: tmplate = host;
84: } else
85: StrAllocCopy(tmplate, "*");
2.32 frystyk 86: if (AUTH_TRACE)
87: HTTrace("Template.... Made template `%s' for file `%s'\n",
2.39 frystyk 88: tmplate, docname ? docname : "<null>");
2.32 frystyk 89: return tmplate;
2.1 luotonen 90: }
91:
2.44 frystyk 92: /* ------------------------------------------------------------------------- */
93: /* Basic Authentication */
94: /* ------------------------------------------------------------------------- */
95:
96: /*
97: ** Prompt the user for username and password.
98: ** Returns YES if user name was typed in, else NO
99: */
100: PRIVATE int prompt_user (HTRequest * request, const char * realm,
101: HTBasic * basic)
102: {
103: HTAlertCallback * cbf = HTAlert_find(HT_A_USER_PW);
104: if (request && cbf) {
105: HTAlertPar * reply = HTAlert_newReply();
106: int msg = basic->proxy ? HT_MSG_PROXY_UID : HT_MSG_UID;
107: BOOL res = (*cbf)(request, HT_A_USER_PW, msg,
108: basic->uid, (char *) realm, reply);
109: if (res) {
110: HT_FREE(basic->uid);
111: HT_FREE(basic->pw);
112: basic->uid = HTAlert_replyMessage(reply);
113: basic->pw = HTAlert_replySecret(reply);
114: }
115: HTAlert_deleteReply(reply);
116: return res ? HT_OK : HT_ERROR;
117: }
118: return HT_OK;
119: }
120:
121: PRIVATE HTBasic * HTBasic_new()
122: {
123: HTBasic * me = NULL;
124: if ((me = (HTBasic *) HT_CALLOC(1, sizeof(HTBasic))) == NULL)
125: HT_OUTOFMEM("HTBasic_new");
126: me->retry = YES; /* Ask the first time through */
127: return me;
128: }
129:
130: /* HTBasic_delete
131: ** --------------
132: ** Deletes a "basic" information object
133: */
134: PUBLIC int HTBasic_delete (void * context)
135: {
136: HTBasic * basic = (HTBasic *) context;
137: if (basic) {
138: HT_FREE(basic->uid);
139: HT_FREE(basic->pw);
140: HT_FREE(basic);
141: return YES;
142: }
143: return NO;
144: }
145:
2.32 frystyk 146: /*
147: ** Make basic authentication scheme credentials and register this
148: ** information in the request object as credentials. They will then
149: ** be included in the request header. An example is
150: **
151: ** "Basic AkRDIhEF8sdEgs72F73bfaS=="
152: **
2.40 frystyk 153: ** The function can both create normal and proxy credentials
2.36 frystyk 154: ** Returns HT_OK or HT_ERROR
2.32 frystyk 155: */
2.36 frystyk 156: PRIVATE BOOL basic_credentials (HTRequest * request, HTBasic * basic)
2.32 frystyk 157: {
158: if (request && basic) {
159: char * cleartext = NULL;
160: char * cipher = NULL;
161: int cl_len = strlen(basic->uid ? basic->uid : "") +
2.42 frystyk 162: strlen(basic->pw ? basic->pw : "") + 5;
2.37 frystyk 163: int ci_len = 4 * (((cl_len+2)/3) + 1);
164: if ((cleartext = (char *) HT_CALLOC(1, cl_len)) == NULL)
2.32 frystyk 165: HT_OUTOFMEM("basic_credentials");
166: *cleartext = '\0';
167: if (basic->uid) strcpy(cleartext, basic->uid);
168: strcat(cleartext, ":");
169: if (basic->pw) strcat(cleartext, basic->pw);
2.37 frystyk 170: if ((cipher = (char *) HT_CALLOC(1, ci_len + 3)) == NULL)
2.32 frystyk 171: HT_OUTOFMEM("basic_credentials");
2.37 frystyk 172: HTUU_encode((unsigned char *) cleartext, strlen(cleartext), cipher);
2.1 luotonen 173:
2.32 frystyk 174: /* Create the credentials and assign them to the request object */
175: {
2.37 frystyk 176: int cr_len = strlen("basic") + ci_len + 3;
2.32 frystyk 177: char * cookie = (char *) HT_MALLOC(cr_len+1);
178: if (!cookie) HT_OUTOFMEM("basic_credentials");
179: strcpy(cookie, "Basic ");
180: strcat(cookie, cipher);
2.37 frystyk 181: if (AUTH_TRACE) HTTrace("Basic Cookie `%s\'\n", cookie);
2.40 frystyk 182:
183: /* Check whether it is proxy or normal credentials */
184: if (basic->proxy)
185: HTRequest_addCredentials(request, "Proxy-Authorization", cookie);
186: else
187: HTRequest_addCredentials(request, "Authorization", cookie);
188:
2.32 frystyk 189: HT_FREE(cookie);
2.1 luotonen 190: }
2.32 frystyk 191: HT_FREE(cleartext);
192: HT_FREE(cipher);
2.36 frystyk 193: return HT_OK;
2.32 frystyk 194: }
2.36 frystyk 195: return HT_ERROR;
2.1 luotonen 196: }
197:
2.32 frystyk 198: /* HTBasic_generate
199: ** ----------------
200: ** This function generates "basic" credentials for the challenge found in
201: ** the authentication information base for this request. The result is
202: ** stored as an association list in the request object.
203: ** This is a callback function for the AA handler.
204: */
2.45 ! frystyk 205: PUBLIC int HTBasic_generate (HTRequest * request, void * context, int mode)
2.32 frystyk 206: {
2.36 frystyk 207: HTBasic * basic = (HTBasic *) context;
2.45 ! frystyk 208: BOOL proxy = mode==HT_NO_PROXY_ACCESS ? YES : NO;
2.36 frystyk 209: if (request) {
210: const char * realm = HTRequest_realm(request);
211:
2.40 frystyk 212: /*
213: ** If we don't have a basic context then add a new one to the tree.
2.42 frystyk 214: ** We use different trees for normal and proxy authentication
2.40 frystyk 215: */
2.36 frystyk 216: if (!basic) {
2.42 frystyk 217: if (proxy) {
218: char * url = HTRequest_proxy(request);
219: basic = HTBasic_new();
220: basic->proxy = YES;
221: HTAA_updateNode(proxy, BASIC_AUTH, realm, url, basic);
222: } else {
223: char * url = HTAnchor_address((HTAnchor*)HTRequest_anchor(request));
224: basic = HTBasic_new();
225: HTAA_updateNode(proxy, BASIC_AUTH, realm, url, basic);
226: HT_FREE(url);
227: }
2.36 frystyk 228: }
229:
2.32 frystyk 230: /*
2.36 frystyk 231: ** If we have a set of credentials (or the user provides a new set)
232: ** then store it in the request object as the credentials
2.32 frystyk 233: */
2.39 frystyk 234: if ((basic->retry && prompt_user(request, realm, basic) == HT_OK) ||
235: (!basic->retry && basic->uid)) {
2.38 frystyk 236: basic->retry = NO;
2.36 frystyk 237: return basic_credentials(request, basic);
2.38 frystyk 238: } else
2.37 frystyk 239: return HT_ERROR;
2.1 luotonen 240: }
2.36 frystyk 241: return HT_OK;
2.1 luotonen 242: }
243:
2.32 frystyk 244: /* HTBasic_parse
245: ** -------------
246: ** This function parses the contents of a "basic" challenge
247: ** and stores the challenge in our authentication information datebase.
248: ** We also store the realm in the request object which will help finding
249: ** the right set of credentials to generate.
250: ** The function is a callback function for the AA handler.
251: */
2.45 ! frystyk 252: PUBLIC int HTBasic_parse (HTRequest * request, HTResponse * response,
! 253: void * context, int status)
2.32 frystyk 254: {
2.45 ! frystyk 255: HTAssocList * challenge = HTResponse_challenge(response);
2.38 frystyk 256: HTBasic * basic = NULL;
2.40 frystyk 257: BOOL proxy = status==HT_NO_PROXY_ACCESS ? YES : NO;
2.36 frystyk 258: if (request && challenge) {
259: char * p = HTAssocList_findObject(challenge, BASIC_AUTH);
260: char * realm = HTNextField(&p);
261: char * rm = HTNextField(&p);
2.38 frystyk 262:
2.32 frystyk 263: /*
2.36 frystyk 264: ** If valid challenge then make a template for the resource and
265: ** store this information in our authentication URL Tree
2.32 frystyk 266: */
2.36 frystyk 267: if (realm && !strcasecomp(realm, "realm") && rm) {
268: if (AUTH_TRACE) HTTrace("Basic Parse. Realm `%s\' found\n", rm);
269: HTRequest_setRealm(request, rm);
2.40 frystyk 270:
271: /*
272: ** If we are in proxy mode then add the proxy - not the final URL
273: */
274: if (proxy) {
275: char * url = HTRequest_proxy(request);
2.42 frystyk 276: if (AUTH_TRACE) HTTrace("Basic Parse. Proxy authentication\n");
2.40 frystyk 277: basic = (HTBasic *) HTAA_updateNode(proxy, BASIC_AUTH, rm,
278: url, NULL);
279: } else {
280: char * url = HTAnchor_address((HTAnchor *)
281: HTRequest_anchor(request));
282: char * tmplate = make_template(url);
283: basic = (HTBasic *) HTAA_updateNode(proxy, BASIC_AUTH, rm,
284: tmplate, NULL);
285: HT_FREE(url);
286: HT_FREE(tmplate);
287: }
2.1 luotonen 288: }
2.38 frystyk 289:
290: /*
291: ** For some reason the authentication failed so we have to ask the user
292: ** if we should try again. It may be because the user typed the wrong
293: ** user name and password
294: */
295: if (basic) {
296: HTAlertCallback * prompt = HTAlert_find(HT_A_CONFIRM);
2.40 frystyk 297:
298: /*
2.42 frystyk 299: ** Do we haev a method registered for prompting the user whether
300: ** we should retry
2.40 frystyk 301: */
2.38 frystyk 302: if (prompt) {
2.40 frystyk 303: int code = proxy ?
304: HT_MSG_RETRY_PROXY_AUTH : HT_MSG_RETRY_AUTHENTICATION;
305: if ((*prompt)(request, HT_A_CONFIRM, code,
2.38 frystyk 306: NULL, NULL, NULL) != YES)
307: return HT_ERROR;
308: basic->retry = YES;
309: }
310: }
2.36 frystyk 311: return HT_OK;
2.1 luotonen 312: }
2.36 frystyk 313: if (AUTH_TRACE) HTTrace("Auth........ No challenges found\n");
2.38 frystyk 314: return HT_ERROR;
2.7 luotonen 315: }
2.44 frystyk 316:
317: /* ------------------------------------------------------------------------- */
318: /* Digest Authentication */
319: /* ------------------------------------------------------------------------- */
320:
321: /*
322: ** Prompt the user for username and password.
323: ** Returns YES if user name was typed in, else NO
324: */
325: PRIVATE int prompt_digest_user (HTRequest * request, const char * realm,
326: HTDigest * digest)
327: {
328: HTAlertCallback * cbf = HTAlert_find(HT_A_USER_PW);
329: if (request && cbf) {
330: HTAlertPar * reply = HTAlert_newReply();
331: int msg = digest->proxy ? HT_MSG_PROXY_UID : HT_MSG_UID;
332: BOOL res = (*cbf)(request, HT_A_USER_PW, msg,
333: digest->uid, (char *) realm, reply);
334: if (res) {
335: HT_FREE(digest->uid);
336: HT_FREE(digest->pw);
337: digest->uid = HTAlert_replyMessage(reply);
338: digest->pw = HTAlert_replySecret(reply);
339: }
340: HTAlert_deleteReply(reply);
341: return res ? HT_OK : HT_ERROR;
342: }
343: return HT_OK;
344: }
345:
346: PRIVATE HTDigest * HTDigest_new()
347: {
348: HTDigest * me = NULL;
349: if ((me = (HTDigest *) HT_CALLOC(1, sizeof(HTDigest))) == NULL)
350: HT_OUTOFMEM("HTDigest_new");
351: me->retry = YES; /* Ask the first time through */
352: return me;
353: }
354:
355: /* HTDigest_delete
356: ** --------------
357: ** Deletes a "digest" information object
358: ** A single object may be registered multiple places in the URL tree.
359: ** We keep a simple reference count on the object so that we know
360: ** when to delete the object.
361: */
362: PUBLIC int HTDigest_delete (void * context)
363: {
364: HTDigest * digest = (HTDigest *) context;
365: if (digest) {
366: if (digest->references <= 0) {
367: HT_FREE(digest->uid);
368: HT_FREE(digest->pw);
369: HT_FREE(digest->nounce);
370: HT_FREE(digest->opaque);
371: HT_FREE(digest);
372: } else
373: digest->references--;
374: return YES;
375: }
376: return NO;
377: }
378:
379: /*
380: ** Make digest authentication scheme credentials and register this
381: ** information in the request object as credentials. They will then
382: ** be included in the request header.
383: ** The function can both create normal and proxy credentials
384: ** Returns HT_OK or HT_ERROR
385: */
386: PRIVATE BOOL digest_credentials (HTRequest * request, HTDigest * digest)
387: {
388: if (request && digest) {
389:
390: /* THIS IS CURRENTLY FOR BASIC AUTH. CHANGE THIS TO DIGEST */
391:
392: char * cleartext = NULL;
393: char * cipher = NULL;
394: int cl_len = strlen(digest->uid ? digest->uid : "") +
395: strlen(digest->pw ? digest->pw : "") + 5;
396: int ci_len = 4 * (((cl_len+2)/3) + 1);
397: if ((cleartext = (char *) HT_CALLOC(1, cl_len)) == NULL)
398: HT_OUTOFMEM("digest_credentials");
399: *cleartext = '\0';
400: if (digest->uid) strcpy(cleartext, digest->uid);
401: strcat(cleartext, ":");
402: if (digest->pw) strcat(cleartext, digest->pw);
403: if ((cipher = (char *) HT_CALLOC(1, ci_len + 3)) == NULL)
404: HT_OUTOFMEM("digest_credentials");
405: HTUU_encode((unsigned char *) cleartext, strlen(cleartext), cipher);
406:
407: /* Create the credentials and assign them to the request object */
408: {
409: int cr_len = strlen("digest") + ci_len + 3;
410: char * cookie = (char *) HT_MALLOC(cr_len+1);
411: if (!cookie) HT_OUTOFMEM("digest_credentials");
412: strcpy(cookie, "Digest ");
413: strcat(cookie, cipher);
414: if (AUTH_TRACE) HTTrace("Digest Cookie `%s\'\n", cookie);
415:
416: /* Check whether it is proxy or normal credentials */
417: if (digest->proxy)
418: HTRequest_addCredentials(request, "Proxy-Authorization", cookie);
419: else
420: HTRequest_addCredentials(request, "Authorization", cookie);
421:
422: HT_FREE(cookie);
423: }
424: HT_FREE(cleartext);
425: HT_FREE(cipher);
426: return HT_OK;
427: }
428: return HT_ERROR;
429: }
430:
431: /* HTDigest_generate
432: ** ----------------
433: ** This function generates "digest" credentials for the challenge found in
434: ** the authentication information base for this request. The result is
435: ** stored as an association list in the request object.
436: ** This is a callback function for the AA handler.
437: */
2.45 ! frystyk 438: PUBLIC int HTDigest_generate (HTRequest * request, void * context, int mode)
2.44 frystyk 439: {
440: HTDigest * digest = (HTDigest *) context;
2.45 ! frystyk 441: BOOL proxy = mode==HT_NO_PROXY_ACCESS ? YES : NO;
2.44 frystyk 442: if (request) {
443: const char * realm = HTRequest_realm(request);
444:
445: /*
446: ** If we don't have a digest context then add a new one to the tree.
447: ** We use different trees for normal and proxy authentication
448: */
449: if (!digest) {
450: if (proxy) {
451: char * url = HTRequest_proxy(request);
452: digest = HTDigest_new();
453: digest->proxy = YES;
454: HTAA_updateNode(proxy, DIGEST_AUTH, realm, url, digest);
455: } else {
456: char * url = HTAnchor_address((HTAnchor*)HTRequest_anchor(request));
457: digest = HTDigest_new();
458: HTAA_updateNode(proxy, DIGEST_AUTH, realm, url, digest);
459: HT_FREE(url);
460: }
461: }
462:
463: /*
464: ** If we have a set of credentials (or the user provides a new set)
465: ** then store it in the request object as the credentials
466: */
467: if ((digest->retry &&
468: prompt_digest_user(request, realm, digest) == HT_OK) ||
469: (!digest->retry && digest->uid)) {
470: digest->retry = NO;
471: return digest_credentials(request, digest);
472: } else
473: return HT_ERROR;
474: }
475: return HT_OK;
476: }
477:
478: /* HTDigest_parse
479: ** -------------
480: ** This function parses the contents of a "digest" challenge
481: ** and stores the challenge in our authentication information datebase.
482: ** We also store the realm in the request object which will help finding
483: ** the right set of credentials to generate.
484: ** The function is a callback function for the AA handler.
485: */
2.45 ! frystyk 486: PUBLIC int HTDigest_parse (HTRequest * request, HTResponse * response,
! 487: void * context, int status)
2.44 frystyk 488: {
2.45 ! frystyk 489: HTAssocList * challenge = HTResponse_challenge(response);
2.44 frystyk 490: HTDigest * digest = NULL;
491: BOOL proxy = status==HT_NO_PROXY_ACCESS ? YES : NO;
492: if (request && challenge) {
493: char * p = HTAssocList_findObject(challenge, DIGEST_AUTH);
494: char * realm = HTNextField(&p);
495: char * value = HTNextField(&p);
496: char * token = NULL;
497: char * uris = NULL;
498: BOOL found = NO;
499:
500: /*
501: ** Search for the realm and see if we have an entry for it. If not
502: ** then create a new entry.
503: */
504: if (realm && !strcasecomp(realm, "realm") && value) {
505: if (AUTH_TRACE) HTTrace("Basic Parse. Realm `%s\' found\n", value);
506: HTRequest_setRealm(request, value);
507: digest = (HTDigest *)
508: HTAA_updateNode(proxy, DIGEST_AUTH, value, NULL, NULL);
509: }
510: if (!digest)
511: digest = HTDigest_new();
512: else
513: found = YES;
514:
515: /*
516: ** Search through the set of parameters in the digest header.
517: ** If valid challenge then make a template for the resource and
518: ** store this information in our authentication URL Tree
519: */
520: while ((token = HTNextField(&p))) {
521: if (!strcasecomp(token, "domain")) {
522: if ((value = HTNextField(&p)))
523: uris = value;
524: } else if (!strcasecomp(token, "nounce")) {
525: if ((value = HTNextField(&p)))
526: StrAllocCopy(digest->nounce, value);
527: } else if (!strcasecomp(token, "opaque")) {
528: if ((value = HTNextField(&p)))
529: StrAllocCopy(digest->opaque, value);
530: } else if (!strcasecomp(token, "stale")) {
531: if ((value = HTNextField(&p)) && !strcasecomp(value, "true"))
532: digest->stale = YES;
533: } else if (!strcasecomp(token, "algorithm")) {
534: if ((value = HTNextField(&p)) && strcasecomp(value, "md5")) {
535: /*
536: ** We only support MD5 for the moment
537: */
538: if (AUTH_TRACE) HTTrace("Digest Parse Unknown algorithm `%s\'\n", value);
539: HTDigest_delete(digest);
540: return HT_ERROR;
541: }
542: }
543: }
544:
545: /*
546: ** Now as we have parsed the full digest header we update the URL tree
547: ** with the new information. If we didn't get a "domain" token then
548: ** add the node using a template. If we have multiple URIs in the
549: ** domain token then add a digest node at each URI.
550: */
551: if (!uris) {
552: if (proxy) {
553: char * location = HTRequest_proxy(request);
554: if (AUTH_TRACE) HTTrace("Digest Parse Proxy authentication\n");
555: HTAA_updateNode(proxy, DIGEST_AUTH, realm, location, digest);
556: } else {
557: char * url = HTAnchor_address((HTAnchor *) HTRequest_anchor(request));
558: char * tmplate = make_template(url);
559: HTAA_updateNode(proxy, DIGEST_AUTH, realm, tmplate, digest);
560: HT_FREE(url);
561: HT_FREE(tmplate);
562: }
563: } else {
564:
565: /*
566: ** ADD THE DIGEST FOR EACH URL IN THE LIST AND INCREMENT THE
567: ** REFERENCE COUNT IN THE DIGEST BY ONE
568: */
569:
570: }
571:
572: /*
573: ** For some reason the authentication failed so we have to ask the user
574: ** if we should try again. It may be because the user typed the wrong
575: ** user name and password
576: */
577: if (found) {
578: HTAlertCallback * prompt = HTAlert_find(HT_A_CONFIRM);
579:
580: /*
581: ** Do we have a method registered for prompting the user whether
582: ** we should retry
583: */
584: if (prompt) {
585: int code = proxy ?
586: HT_MSG_RETRY_PROXY_AUTH : HT_MSG_RETRY_AUTHENTICATION;
587: if ((*prompt)(request, HT_A_CONFIRM, code,
588: NULL, NULL, NULL) != YES)
589: return HT_ERROR;
590: digest->retry = YES;
591: }
592: }
593: return HT_OK;
594: }
595: if (AUTH_TRACE) HTTrace("Auth........ No challenges found\n");
596: return HT_ERROR;
597: }
598:
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