2 * Authentication functions for CUPS.
4 * Copyright 2007-2019 by Apple Inc.
5 * Copyright 1997-2007 by Easy Software Products.
7 * This file contains Kerberos support code, copyright 2006 by
10 * Licensed under Apache License v2.0. See the file "LICENSE" for more information.
14 * Include necessary headers...
17 #include "cups-private.h"
18 #include "debug-internal.h"
21 #if defined(_WIN32) || defined(__EMX__)
25 #endif /* _WIN32 || __EMX__ */
27 #if HAVE_AUTHORIZATION_H
28 # include <Security/Authorization.h>
29 #endif /* HAVE_AUTHORIZATION_H */
31 #if defined(SO_PEERCRED) && defined(AF_LOCAL)
33 #endif /* SO_PEERCRED && AF_LOCAL */
40 static const char *cups_auth_find(const char *www_authenticate
, const char *scheme
);
41 static const char *cups_auth_param(const char *scheme
, const char *name
, char *value
, size_t valsize
);
42 static const char *cups_auth_scheme(const char *www_authenticate
, char *scheme
, size_t schemesize
);
45 # define CUPS_GSS_OK 0 /* Successfully set credentials */
46 # define CUPS_GSS_NONE -1 /* No credentials */
47 # define CUPS_GSS_FAIL -2 /* Failed credentials/authentication */
48 # ifdef HAVE_GSS_ACQUIRE_CRED_EX_F
49 # ifdef HAVE_GSS_GSSAPI_SPI_H
50 # include <GSS/gssapi_spi.h>
52 # define GSS_AUTH_IDENTITY_TYPE_1 1
53 # define gss_acquire_cred_ex_f __ApplePrivate_gss_acquire_cred_ex_f
54 typedef struct gss_auth_identity
/* @private@ */
61 gss_buffer_t
*credentialsRef
;
62 } gss_auth_identity_desc
;
63 extern OM_uint32
gss_acquire_cred_ex_f(gss_status_id_t
, const gss_name_t
,
64 OM_uint32
, OM_uint32
, const gss_OID
,
65 gss_cred_usage_t
, gss_auth_identity_t
,
66 void *, void (*)(void *, OM_uint32
,
71 # endif /* HAVE_GSS_GSSAPI_SPI_H */
72 # include <dispatch/dispatch.h>
73 typedef struct _cups_gss_acquire_s
/* Acquire callback data */
75 dispatch_semaphore_t sem
; /* Synchronization semaphore */
76 OM_uint32 major
; /* Returned status code */
77 gss_cred_id_t creds
; /* Returned credentials */
78 } _cups_gss_acquire_t
;
80 static void cups_gss_acquire(void *ctx
, OM_uint32 major
,
81 gss_status_id_t status
,
82 gss_cred_id_t creds
, gss_OID_set oids
,
84 # endif /* HAVE_GSS_ACQUIRE_CRED_EX_F */
85 static gss_name_t
cups_gss_getname(http_t
*http
, const char *service_name
);
87 static void cups_gss_printf(OM_uint32 major_status
, OM_uint32 minor_status
,
90 # define cups_gss_printf(major, minor, message)
92 #endif /* HAVE_GSSAPI */
93 static int cups_is_local_connection(http_t
*http
);
94 static int cups_local_auth(http_t
*http
);
98 * 'cupsDoAuthentication()' - Authenticate a request.
100 * This function should be called in response to a @code HTTP_STATUS_UNAUTHORIZED@
101 * status, prior to resubmitting your request.
103 * @since CUPS 1.1.20/macOS 10.4@
106 int /* O - 0 on success, -1 on error */
107 cupsDoAuthentication(
108 http_t
*http
, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
109 const char *method
, /* I - Request method ("GET", "POST", "PUT") */
110 const char *resource
) /* I - Resource path */
112 const char *password
, /* Password string */
113 *www_auth
, /* WWW-Authenticate header */
114 *schemedata
; /* Scheme-specific data */
115 char scheme
[256], /* Scheme name */
116 prompt
[1024]; /* Prompt for user */
117 int localauth
; /* Local authentication result */
118 _cups_globals_t
*cg
; /* Global data */
121 DEBUG_printf(("cupsDoAuthentication(http=%p, method=\"%s\", resource=\"%s\")", (void *)http
, method
, resource
));
124 http
= _cupsConnect();
126 if (!http
|| !method
|| !resource
)
129 DEBUG_printf(("2cupsDoAuthentication: digest_tries=%d, userpass=\"%s\"",
130 http
->digest_tries
, http
->userpass
));
131 DEBUG_printf(("2cupsDoAuthentication: WWW-Authenticate=\"%s\"",
132 httpGetField(http
, HTTP_FIELD_WWW_AUTHENTICATE
)));
135 * Clear the current authentication string...
138 httpSetAuthString(http
, NULL
, NULL
);
141 * See if we can do local authentication...
144 if (http
->digest_tries
< 3)
146 if ((localauth
= cups_local_auth(http
)) == 0)
148 DEBUG_printf(("2cupsDoAuthentication: authstring=\"%s\"",
151 if (http
->status
== HTTP_STATUS_UNAUTHORIZED
)
152 http
->digest_tries
++;
156 else if (localauth
== -1)
158 http
->status
= HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED
;
159 return (-1); /* Error or canceled */
164 * Nope, loop through the authentication schemes to find the first we support.
167 www_auth
= httpGetField(http
, HTTP_FIELD_WWW_AUTHENTICATE
);
169 for (schemedata
= cups_auth_scheme(www_auth
, scheme
, sizeof(scheme
)); schemedata
; schemedata
= cups_auth_scheme(schemedata
+ strlen(scheme
), scheme
, sizeof(scheme
)))
172 * Check the scheme name...
175 DEBUG_printf(("2cupsDoAuthentication: Trying scheme \"%s\"...", scheme
));
178 if (!_cups_strcasecmp(scheme
, "Negotiate") && !cups_is_local_connection(http
))
181 * Kerberos authentication to remote server...
184 int gss_status
; /* Auth status */
186 if ((gss_status
= _cupsSetNegotiateAuthString(http
, method
, resource
)) == CUPS_GSS_FAIL
)
188 DEBUG_puts("1cupsDoAuthentication: Negotiate failed.");
189 http
->status
= HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED
;
192 else if (gss_status
== CUPS_GSS_NONE
)
194 DEBUG_puts("2cupsDoAuthentication: No credentials for Negotiate.");
199 DEBUG_puts("2cupsDoAuthentication: Using Negotiate.");
204 #endif /* HAVE_GSSAPI */
205 if (_cups_strcasecmp(scheme
, "Basic") &&
206 _cups_strcasecmp(scheme
, "Digest") &&
207 _cups_strcasecmp(scheme
, "Negotiate"))
210 * Other schemes not yet supported...
213 DEBUG_printf(("2cupsDoAuthentication: Scheme \"%s\" not yet supported.", scheme
));
218 * See if we should retry the current username:password...
221 if (http
->digest_tries
> 1 || !http
->userpass
[0])
224 * Nope - get a new password from the user...
227 char default_username
[HTTP_MAX_VALUE
];
228 /* Default username */
232 if (!cg
->lang_default
)
233 cg
->lang_default
= cupsLangDefault();
235 if (cups_auth_param(schemedata
, "username", default_username
, sizeof(default_username
)))
236 cupsSetUser(default_username
);
238 snprintf(prompt
, sizeof(prompt
), _cupsLangString(cg
->lang_default
, _("Password for %s on %s? ")), cupsUser(), http
->hostname
[0] == '/' ? "localhost" : http
->hostname
);
240 http
->digest_tries
= _cups_strncasecmp(scheme
, "Digest", 6) != 0;
241 http
->userpass
[0] = '\0';
243 if ((password
= cupsGetPassword2(prompt
, http
, method
, resource
)) == NULL
)
245 DEBUG_puts("1cupsDoAuthentication: User canceled password request.");
246 http
->status
= HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED
;
250 snprintf(http
->userpass
, sizeof(http
->userpass
), "%s:%s", cupsUser(), password
);
252 else if (http
->status
== HTTP_STATUS_UNAUTHORIZED
)
253 http
->digest_tries
++;
255 if (http
->status
== HTTP_STATUS_UNAUTHORIZED
&& http
->digest_tries
>= 3)
257 DEBUG_printf(("1cupsDoAuthentication: Too many authentication tries (%d)", http
->digest_tries
));
259 http
->status
= HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED
;
264 * Got a password; encode it for the server...
267 if (!_cups_strcasecmp(scheme
, "Basic"))
270 * Basic authentication...
273 char encode
[256]; /* Base64 buffer */
275 DEBUG_puts("2cupsDoAuthentication: Using Basic.");
276 httpEncode64_2(encode
, sizeof(encode
), http
->userpass
, (int)strlen(http
->userpass
));
277 httpSetAuthString(http
, "Basic", encode
);
280 else if (!_cups_strcasecmp(scheme
, "Digest"))
283 * Digest authentication...
286 char nonce
[HTTP_MAX_VALUE
]; /* nonce="xyz" string */
288 cups_auth_param(schemedata
, "algorithm", http
->algorithm
, sizeof(http
->algorithm
));
289 cups_auth_param(schemedata
, "opaque", http
->opaque
, sizeof(http
->opaque
));
290 cups_auth_param(schemedata
, "nonce", nonce
, sizeof(nonce
));
291 cups_auth_param(schemedata
, "realm", http
->realm
, sizeof(http
->realm
));
293 if (_httpSetDigestAuthString(http
, nonce
, method
, resource
))
295 DEBUG_puts("2cupsDoAuthentication: Using Digest.");
301 if (http
->authstring
&& http
->authstring
[0])
303 DEBUG_printf(("1cupsDoAuthentication: authstring=\"%s\".", http
->authstring
));
309 DEBUG_puts("1cupsDoAuthentication: No supported schemes.");
310 http
->status
= HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED
;
319 * '_cupsSetNegotiateAuthString()' - Set the Kerberos authentication string.
322 int /* O - 0 on success, negative on error */
323 _cupsSetNegotiateAuthString(
324 http_t
*http
, /* I - Connection to server */
325 const char *method
, /* I - Request method ("GET", "POST", "PUT") */
326 const char *resource
) /* I - Resource path */
328 OM_uint32 minor_status
, /* Minor status code */
329 major_status
; /* Major status code */
330 gss_buffer_desc output_token
= GSS_C_EMPTY_BUFFER
;
335 * If the weak-linked GSSAPI/Kerberos library is not present, don't try
339 if (&gss_init_sec_context
== NULL
)
341 DEBUG_puts("1_cupsSetNegotiateAuthString: Weak-linked GSSAPI/Kerberos "
342 "framework is not present");
343 return (CUPS_GSS_NONE
);
345 # endif /* __APPLE__ */
347 if (!strcmp(http
->hostname
, "localhost") || http
->hostname
[0] == '/' || isdigit(http
->hostname
[0] & 255) || !strchr(http
->hostname
, '.'))
349 DEBUG_printf(("1_cupsSetNegotiateAuthString: Kerberos not available for host \"%s\".", http
->hostname
));
350 return (CUPS_GSS_NONE
);
353 if (http
->gssname
== GSS_C_NO_NAME
)
355 http
->gssname
= cups_gss_getname(http
, _cupsGSSServiceName());
358 if (http
->gssctx
!= GSS_C_NO_CONTEXT
)
360 gss_delete_sec_context(&minor_status
, &http
->gssctx
, GSS_C_NO_BUFFER
);
361 http
->gssctx
= GSS_C_NO_CONTEXT
;
364 major_status
= gss_init_sec_context(&minor_status
, GSS_C_NO_CREDENTIAL
,
366 http
->gssname
, http
->gssmech
,
367 GSS_C_MUTUAL_FLAG
| GSS_C_INTEG_FLAG
,
369 GSS_C_NO_CHANNEL_BINDINGS
,
370 GSS_C_NO_BUFFER
, &http
->gssmech
,
371 &output_token
, NULL
, NULL
);
373 # ifdef HAVE_GSS_ACQUIRE_CRED_EX_F
374 if (major_status
== GSS_S_NO_CRED
)
377 * Ask the user for credentials...
380 char prompt
[1024], /* Prompt for user */
381 userbuf
[256]; /* Kerberos username */
382 const char *username
, /* Username string */
383 *password
; /* Password string */
384 _cups_gss_acquire_t data
; /* Callback data */
385 gss_auth_identity_desc identity
; /* Kerberos user identity */
386 _cups_globals_t
*cg
= _cupsGlobals();
387 /* Per-thread global data */
389 if (!cg
->lang_default
)
390 cg
->lang_default
= cupsLangDefault();
392 snprintf(prompt
, sizeof(prompt
),
393 _cupsLangString(cg
->lang_default
, _("Password for %s on %s? ")),
394 cupsUser(), http
->gsshost
);
396 if ((password
= cupsGetPassword2(prompt
, http
, method
, resource
)) == NULL
)
397 return (CUPS_GSS_FAIL
);
400 * Try to acquire credentials...
403 username
= cupsUser();
404 if (!strchr(username
, '@'))
406 snprintf(userbuf
, sizeof(userbuf
), "%s@%s", username
, http
->gsshost
);
410 identity
.type
= GSS_AUTH_IDENTITY_TYPE_1
;
412 identity
.username
= (char *)username
;
413 identity
.realm
= (char *)"";
414 identity
.password
= (char *)password
;
415 identity
.credentialsRef
= NULL
;
417 data
.sem
= dispatch_semaphore_create(0);
423 major_status
= gss_acquire_cred_ex_f(NULL
, GSS_C_NO_NAME
, 0, GSS_C_INDEFINITE
, GSS_KRB5_MECHANISM
, GSS_C_INITIATE
, (gss_auth_identity_t
)&identity
, &data
, cups_gss_acquire
);
425 if (major_status
== GSS_S_COMPLETE
)
427 dispatch_semaphore_wait(data
.sem
, DISPATCH_TIME_FOREVER
);
428 major_status
= data
.major
;
431 dispatch_release(data
.sem
);
433 if (major_status
== GSS_S_COMPLETE
)
435 OM_uint32 release_minor
; /* Minor status from releasing creds */
437 major_status
= gss_init_sec_context(&minor_status
, data
.creds
,
439 http
->gssname
, http
->gssmech
,
440 GSS_C_MUTUAL_FLAG
| GSS_C_INTEG_FLAG
,
442 GSS_C_NO_CHANNEL_BINDINGS
,
443 GSS_C_NO_BUFFER
, &http
->gssmech
,
444 &output_token
, NULL
, NULL
);
445 gss_release_cred(&release_minor
, &data
.creds
);
452 # endif /* HAVE_GSS_ACQUIRED_CRED_EX_F */
454 if (major_status
== GSS_S_NO_CRED
)
456 cups_gss_printf(major_status
, minor_status
, "_cupsSetNegotiateAuthString: No credentials");
457 return (CUPS_GSS_NONE
);
459 else if (GSS_ERROR(major_status
))
461 cups_gss_printf(major_status
, minor_status
, "_cupsSetNegotiateAuthString: Unable to initialize security context");
462 return (CUPS_GSS_FAIL
);
466 else if (major_status
== GSS_S_CONTINUE_NEEDED
)
467 cups_gss_printf(major_status
, minor_status
, "_cupsSetNegotiateAuthString: Continuation needed");
470 if (output_token
.length
> 0 && output_token
.length
<= 65536)
473 * Allocate the authorization string since Windows KDCs can have
474 * arbitrarily large credentials...
477 int authsize
= 10 + /* "Negotiate " */
478 (((int)output_token
.length
* 4 / 3 + 3) & ~3) + 1;
481 httpSetAuthString(http
, NULL
, NULL
);
483 if ((http
->authstring
= malloc((size_t)authsize
)) == NULL
)
485 http
->authstring
= http
->_authstring
;
486 authsize
= sizeof(http
->_authstring
);
489 strlcpy(http
->authstring
, "Negotiate ", (size_t)authsize
);
490 httpEncode64_2(http
->authstring
+ 10, authsize
- 10, output_token
.value
,
491 (int)output_token
.length
);
493 gss_release_buffer(&minor_status
, &output_token
);
497 DEBUG_printf(("1_cupsSetNegotiateAuthString: Kerberos credentials too "
498 "large - %d bytes!", (int)output_token
.length
));
499 gss_release_buffer(&minor_status
, &output_token
);
501 return (CUPS_GSS_FAIL
);
504 return (CUPS_GSS_OK
);
506 #endif /* HAVE_GSSAPI */
510 * 'cups_auth_find()' - Find the named WWW-Authenticate scheme.
512 * The "www_authenticate" parameter points to the current position in the header.
514 * Returns @code NULL@ if the auth scheme is not present.
517 static const char * /* O - Start of matching scheme or @code NULL@ if not found */
518 cups_auth_find(const char *www_authenticate
, /* I - Pointer into WWW-Authenticate header */
519 const char *scheme
) /* I - Authentication scheme */
521 size_t schemelen
= strlen(scheme
); /* Length of scheme */
524 DEBUG_printf(("8cups_auth_find(www_authenticate=\"%s\", scheme=\"%s\"(%d))", www_authenticate
, scheme
, (int)schemelen
));
526 while (*www_authenticate
)
529 * Skip leading whitespace and commas...
532 DEBUG_printf(("9cups_auth_find: Before whitespace: \"%s\"", www_authenticate
));
533 while (isspace(*www_authenticate
& 255) || *www_authenticate
== ',')
535 DEBUG_printf(("9cups_auth_find: After whitespace: \"%s\"", www_authenticate
));
538 * See if this is "Scheme" followed by whitespace or the end of the string.
541 if (!strncmp(www_authenticate
, scheme
, schemelen
) && (isspace(www_authenticate
[schemelen
] & 255) || www_authenticate
[schemelen
] == ',' || !www_authenticate
[schemelen
]))
544 * Yes, this is the start of the scheme-specific information...
547 DEBUG_printf(("9cups_auth_find: Returning \"%s\".", www_authenticate
));
549 return (www_authenticate
);
553 * Skip the scheme name or param="value" string...
556 while (!isspace(*www_authenticate
& 255) && *www_authenticate
)
558 if (*www_authenticate
== '\"')
561 * Skip quoted value...
566 while (*www_authenticate
&& *www_authenticate
!= '\"');
568 DEBUG_printf(("9cups_auth_find: After quoted: \"%s\"", www_authenticate
));
574 DEBUG_printf(("9cups_auth_find: After skip: \"%s\"", www_authenticate
));
577 DEBUG_puts("9cups_auth_find: Returning NULL.");
584 * 'cups_auth_param()' - Copy the value for the named authentication parameter,
588 static const char * /* O - Parameter value or @code NULL@ if not present */
589 cups_auth_param(const char *scheme
, /* I - Pointer to auth data */
590 const char *name
, /* I - Name of parameter */
591 char *value
, /* I - Value buffer */
592 size_t valsize
) /* I - Size of value buffer */
594 char *valptr
= value
, /* Pointer into value buffer */
595 *valend
= value
+ valsize
- 1; /* Pointer to end of buffer */
596 size_t namelen
= strlen(name
); /* Name length */
597 int param
; /* Is this a parameter? */
600 DEBUG_printf(("8cups_auth_param(scheme=\"%s\", name=\"%s\", value=%p, valsize=%d)", scheme
, name
, (void *)value
, (int)valsize
));
602 while (!isspace(*scheme
& 255) && *scheme
)
607 while (isspace(*scheme
& 255) || *scheme
== ',')
610 if (!strncmp(scheme
, name
, namelen
) && scheme
[namelen
] == '=')
613 * Found the parameter, copy the value...
616 scheme
+= namelen
+ 1;
621 while (*scheme
&& *scheme
!= '\"')
631 while (*scheme
&& strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~+/=", *scheme
))
642 DEBUG_printf(("9cups_auth_param: Returning \"%s\".", value
));
648 * Skip the param=value string...
653 while (!isspace(*scheme
& 255) && *scheme
)
657 else if (*scheme
== '\"')
660 * Skip quoted value...
664 while (*scheme
&& *scheme
!= '\"')
672 * If this wasn't a parameter, we are at the end of this scheme's
682 DEBUG_puts("9cups_auth_param: Returning NULL.");
689 * 'cups_auth_scheme()' - Get the (next) WWW-Authenticate scheme.
691 * The "www_authenticate" parameter points to the current position in the header.
693 * Returns @code NULL@ if there are no (more) auth schemes present.
696 static const char * /* O - Start of scheme or @code NULL@ if not found */
697 cups_auth_scheme(const char *www_authenticate
, /* I - Pointer into WWW-Authenticate header */
698 char *scheme
, /* I - Scheme name buffer */
699 size_t schemesize
) /* I - Size of buffer */
701 const char *start
; /* Start of scheme data */
702 char *sptr
= scheme
, /* Pointer into scheme buffer */
703 *send
= scheme
+ schemesize
- 1;/* End of scheme buffer */
704 int param
; /* Is this a parameter? */
707 DEBUG_printf(("8cups_auth_scheme(www_authenticate=\"%s\", scheme=%p, schemesize=%d)", www_authenticate
, (void *)scheme
, (int)schemesize
));
709 while (*www_authenticate
)
712 * Skip leading whitespace and commas...
715 while (isspace(*www_authenticate
& 255) || *www_authenticate
== ',')
719 * Parse the scheme name or param="value" string...
722 for (sptr
= scheme
, start
= www_authenticate
, param
= 0; *www_authenticate
&& *www_authenticate
!= ',' && !isspace(*www_authenticate
& 255); www_authenticate
++)
724 if (*www_authenticate
== '=')
726 else if (!param
&& sptr
< send
)
727 *sptr
++ = *www_authenticate
;
728 else if (*www_authenticate
== '\"')
731 * Skip quoted value...
735 while (*www_authenticate
&& *www_authenticate
!= '\"')
740 if (sptr
> scheme
&& !param
)
744 DEBUG_printf(("9cups_auth_scheme: Returning \"%s\".", start
));
752 DEBUG_puts("9cups_auth_scheme: Returning NULL.");
759 # ifdef HAVE_GSS_ACQUIRE_CRED_EX_F
761 * 'cups_gss_acquire()' - Kerberos credentials callback.
765 void *ctx
, /* I - Caller context */
766 OM_uint32 major
, /* I - Major error code */
767 gss_status_id_t status
, /* I - Status (unused) */
768 gss_cred_id_t creds
, /* I - Credentials (if any) */
769 gss_OID_set oids
, /* I - Mechanism OIDs (unused) */
770 OM_uint32 time_rec
) /* I - Timestamp (unused) */
772 uint32_t min
; /* Minor error code */
773 _cups_gss_acquire_t
*data
; /* Callback data */
779 data
= (_cups_gss_acquire_t
*)ctx
;
783 gss_release_oid_set(&min
, &oids
);
784 dispatch_semaphore_signal(data
->sem
);
786 # endif /* HAVE_GSS_ACQUIRE_CRED_EX_F */
790 * 'cups_gss_getname()' - Get CUPS service credentials for authentication.
793 static gss_name_t
/* O - Server name */
795 http_t
*http
, /* I - Connection to server */
796 const char *service_name
) /* I - Service name */
798 gss_buffer_desc token
= GSS_C_EMPTY_BUFFER
;
800 OM_uint32 major_status
, /* Major status code */
801 minor_status
; /* Minor status code */
802 gss_name_t server_name
; /* Server name */
803 char buf
[1024]; /* Name buffer */
806 DEBUG_printf(("7cups_gss_getname(http=%p, service_name=\"%s\")", http
,
811 * Get the hostname...
814 if (!http
->gsshost
[0])
816 httpGetHostname(http
, http
->gsshost
, sizeof(http
->gsshost
));
818 if (!strcmp(http
->gsshost
, "localhost"))
820 if (gethostname(http
->gsshost
, sizeof(http
->gsshost
)) < 0)
822 DEBUG_printf(("1cups_gss_getname: gethostname() failed: %s",
824 http
->gsshost
[0] = '\0';
828 if (!strchr(http
->gsshost
, '.'))
831 * The hostname is not a FQDN, so look it up...
834 struct hostent
*host
; /* Host entry to get FQDN */
836 if ((host
= gethostbyname(http
->gsshost
)) != NULL
&& host
->h_name
)
839 * Use the resolved hostname...
842 strlcpy(http
->gsshost
, host
->h_name
, sizeof(http
->gsshost
));
846 DEBUG_printf(("1cups_gss_getname: gethostbyname(\"%s\") failed.",
848 http
->gsshost
[0] = '\0';
856 * Get a service name we can use for authentication purposes...
859 snprintf(buf
, sizeof(buf
), "%s@%s", service_name
, http
->gsshost
);
861 DEBUG_printf(("8cups_gss_getname: Looking up \"%s\".", buf
));
864 token
.length
= strlen(buf
);
865 server_name
= GSS_C_NO_NAME
;
866 major_status
= gss_import_name(&minor_status
, &token
,
867 GSS_C_NT_HOSTBASED_SERVICE
,
870 if (GSS_ERROR(major_status
))
872 cups_gss_printf(major_status
, minor_status
,
873 "cups_gss_getname: gss_import_name() failed");
877 return (server_name
);
883 * 'cups_gss_printf()' - Show debug error messages from GSSAPI.
887 cups_gss_printf(OM_uint32 major_status
,/* I - Major status code */
888 OM_uint32 minor_status
,/* I - Minor status code */
889 const char *message
) /* I - Prefix for error message */
891 OM_uint32 err_major_status
, /* Major status code for display */
892 err_minor_status
; /* Minor status code for display */
893 OM_uint32 msg_ctx
; /* Message context */
894 gss_buffer_desc major_status_string
= GSS_C_EMPTY_BUFFER
,
895 /* Major status message */
896 minor_status_string
= GSS_C_EMPTY_BUFFER
;
897 /* Minor status message */
901 err_major_status
= gss_display_status(&err_minor_status
,
906 &major_status_string
);
908 if (!GSS_ERROR(err_major_status
))
909 gss_display_status(&err_minor_status
, minor_status
, GSS_C_MECH_CODE
,
910 GSS_C_NULL_OID
, &msg_ctx
, &minor_status_string
);
912 DEBUG_printf(("1%s: %s, %s", message
, (char *)major_status_string
.value
,
913 (char *)minor_status_string
.value
));
915 gss_release_buffer(&err_minor_status
, &major_status_string
);
916 gss_release_buffer(&err_minor_status
, &minor_status_string
);
919 #endif /* HAVE_GSSAPI */
921 static int /* O - 0 if not a local connection */
922 /* 1 if local connection */
923 cups_is_local_connection(http_t
*http
) /* I - HTTP connection to server */
925 if (!httpAddrLocalhost(http
->hostaddr
) && _cups_strcasecmp(http
->hostname
, "localhost") != 0)
931 * 'cups_local_auth()' - Get the local authorization certificate if
932 * available/applicable.
935 static int /* O - 0 if available */
936 /* 1 if not available */
938 cups_local_auth(http_t
*http
) /* I - HTTP connection to server */
940 #if defined(_WIN32) || defined(__EMX__)
942 * Currently _WIN32 and OS-2 do not support the CUPS server...
947 int pid
; /* Current process ID */
948 FILE *fp
; /* Certificate file */
949 char trc
[16], /* Try Root Certificate parameter */
950 filename
[1024]; /* Certificate filename */
951 const char *www_auth
, /* WWW-Authenticate header */
952 *schemedata
; /* Data for the named auth scheme */
953 _cups_globals_t
*cg
= _cupsGlobals(); /* Global data */
954 # if defined(HAVE_AUTHORIZATION_H)
955 OSStatus status
; /* Status */
956 AuthorizationItem auth_right
; /* Authorization right */
957 AuthorizationRights auth_rights
; /* Authorization rights */
958 AuthorizationFlags auth_flags
; /* Authorization flags */
959 AuthorizationExternalForm auth_extrn
; /* Authorization ref external */
960 char auth_key
[1024]; /* Buffer */
961 char buffer
[1024]; /* Buffer */
962 # endif /* HAVE_AUTHORIZATION_H */
965 DEBUG_printf(("7cups_local_auth(http=%p) hostaddr=%s, hostname=\"%s\"", (void *)http
, httpAddrString(http
->hostaddr
, filename
, sizeof(filename
)), http
->hostname
));
968 * See if we are accessing localhost...
971 if (!cups_is_local_connection(http
))
973 DEBUG_puts("8cups_local_auth: Not a local connection!");
977 www_auth
= httpGetField(http
, HTTP_FIELD_WWW_AUTHENTICATE
);
979 # if defined(HAVE_AUTHORIZATION_H)
981 * Delete any previous authorization reference...
986 AuthorizationFree(http
->auth_ref
, kAuthorizationFlagDefaults
);
987 http
->auth_ref
= NULL
;
990 if (!getenv("GATEWAY_INTERFACE") && (schemedata
= cups_auth_find(www_auth
, "AuthRef")) != NULL
&& cups_auth_param(schemedata
, "key", auth_key
, sizeof(auth_key
)))
992 status
= AuthorizationCreate(NULL
, kAuthorizationEmptyEnvironment
, kAuthorizationFlagDefaults
, &http
->auth_ref
);
993 if (status
!= errAuthorizationSuccess
)
995 DEBUG_printf(("8cups_local_auth: AuthorizationCreate() returned %d",
1000 auth_right
.name
= auth_key
;
1001 auth_right
.valueLength
= 0;
1002 auth_right
.value
= NULL
;
1003 auth_right
.flags
= 0;
1005 auth_rights
.count
= 1;
1006 auth_rights
.items
= &auth_right
;
1008 auth_flags
= kAuthorizationFlagDefaults
|
1009 kAuthorizationFlagPreAuthorize
|
1010 kAuthorizationFlagInteractionAllowed
|
1011 kAuthorizationFlagExtendRights
;
1013 status
= AuthorizationCopyRights(http
->auth_ref
, &auth_rights
,
1014 kAuthorizationEmptyEnvironment
,
1016 if (status
== errAuthorizationSuccess
)
1017 status
= AuthorizationMakeExternalForm(http
->auth_ref
, &auth_extrn
);
1019 if (status
== errAuthorizationSuccess
)
1022 * Set the authorization string and return...
1025 httpEncode64_2(buffer
, sizeof(buffer
), (void *)&auth_extrn
,
1026 sizeof(auth_extrn
));
1028 httpSetAuthString(http
, "AuthRef", buffer
);
1030 DEBUG_printf(("8cups_local_auth: Returning authstring=\"%s\"",
1034 else if (status
== errAuthorizationCanceled
)
1037 DEBUG_printf(("9cups_local_auth: AuthorizationCopyRights() returned %d", (int)status
));
1040 * Fall through to try certificates...
1043 # endif /* HAVE_AUTHORIZATION_H */
1045 # if defined(SO_PEERCRED) && defined(AF_LOCAL)
1047 * See if we can authenticate using the peer credentials provided over a
1048 * domain socket; if so, specify "PeerCred username" as the authentication
1052 if (http
->hostaddr
->addr
.sa_family
== AF_LOCAL
&&
1053 !getenv("GATEWAY_INTERFACE") && /* Not via CGI programs... */
1054 cups_auth_find(www_auth
, "PeerCred"))
1057 * Verify that the current cupsUser() matches the current UID...
1060 struct passwd
*pwd
; /* Password information */
1061 const char *username
; /* Current username */
1063 username
= cupsUser();
1065 if ((pwd
= getpwnam(username
)) != NULL
&& pwd
->pw_uid
== getuid())
1067 httpSetAuthString(http
, "PeerCred", username
);
1069 DEBUG_printf(("8cups_local_auth: Returning authstring=\"%s\"",
1075 # endif /* SO_PEERCRED && AF_LOCAL */
1077 if ((schemedata
= cups_auth_find(www_auth
, "Local")) == NULL
)
1081 * Try opening a certificate file for this PID. If that fails,
1082 * try the root certificate...
1086 snprintf(filename
, sizeof(filename
), "%s/certs/%d", cg
->cups_statedir
, pid
);
1087 if ((fp
= fopen(filename
, "r")) == NULL
&& pid
> 0)
1090 * No certificate for this PID; see if we can get the root certificate...
1093 DEBUG_printf(("9cups_local_auth: Unable to open file \"%s\": %s", filename
, strerror(errno
)));
1095 if (!cups_auth_param(schemedata
, "trc", trc
, sizeof(trc
)))
1098 * Scheduler doesn't want us to use the root certificate...
1104 snprintf(filename
, sizeof(filename
), "%s/certs/0", cg
->cups_statedir
);
1105 if ((fp
= fopen(filename
, "r")) == NULL
)
1106 DEBUG_printf(("9cups_local_auth: Unable to open file \"%s\": %s", filename
, strerror(errno
)));
1112 * Read the certificate from the file...
1115 char certificate
[33], /* Certificate string */
1116 *certptr
; /* Pointer to certificate string */
1118 certptr
= fgets(certificate
, sizeof(certificate
), fp
);
1124 * Set the authorization string and return...
1127 httpSetAuthString(http
, "Local", certificate
);
1129 DEBUG_printf(("8cups_local_auth: Returning authstring=\"%s\"",
1137 #endif /* _WIN32 || __EMX__ */