2 * Authentication functions for CUPS.
4 * Copyright 2007-2018 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"
20 #if defined(WIN32) || defined(__EMX__)
24 #endif /* WIN32 || __EMX__ */
26 #if HAVE_AUTHORIZATION_H
27 # include <Security/Authorization.h>
28 # ifdef HAVE_SECBASEPRIV_H
29 # include <Security/SecBasePriv.h>
31 extern const char *cssmErrorString(int error
);
32 # endif /* HAVE_SECBASEPRIV_H */
33 #endif /* HAVE_AUTHORIZATION_H */
35 #if defined(SO_PEERCRED) && defined(AF_LOCAL)
37 #endif /* SO_PEERCRED && AF_LOCAL */
44 static const char *cups_auth_find(const char *www_authenticate
, const char *scheme
);
45 static const char *cups_auth_param(const char *scheme
, const char *name
, char *value
, size_t valsize
);
46 static const char *cups_auth_scheme(const char *www_authenticate
, char *scheme
, size_t schemesize
);
49 # ifdef HAVE_GSS_ACQUIRE_CRED_EX_F
50 # ifdef HAVE_GSS_GSSAPI_SPI_H
51 # include <GSS/gssapi_spi.h>
53 # define GSS_AUTH_IDENTITY_TYPE_1 1
54 # define gss_acquire_cred_ex_f __ApplePrivate_gss_acquire_cred_ex_f
55 typedef struct gss_auth_identity
/* @private@ */
62 gss_buffer_t
*credentialsRef
;
63 } gss_auth_identity_desc
;
64 extern OM_uint32
gss_acquire_cred_ex_f(gss_status_id_t
, const gss_name_t
,
65 OM_uint32
, OM_uint32
, const gss_OID
,
66 gss_cred_usage_t
, gss_auth_identity_t
,
67 void *, void (*)(void *, OM_uint32
,
72 # endif /* HAVE_GSS_GSSAPI_SPI_H */
73 # include <dispatch/dispatch.h>
74 typedef struct _cups_gss_acquire_s
/* Acquire callback data */
76 dispatch_semaphore_t sem
; /* Synchronization semaphore */
77 OM_uint32 major
; /* Returned status code */
78 gss_cred_id_t creds
; /* Returned credentials */
79 } _cups_gss_acquire_t
;
81 static void cups_gss_acquire(void *ctx
, OM_uint32 major
,
82 gss_status_id_t status
,
83 gss_cred_id_t creds
, gss_OID_set oids
,
85 # endif /* HAVE_GSS_ACQUIRE_CRED_EX_F */
86 static gss_name_t
cups_gss_getname(http_t
*http
, const char *service_name
);
88 static void cups_gss_printf(OM_uint32 major_status
, OM_uint32 minor_status
,
91 # define cups_gss_printf(major, minor, message)
93 #endif /* HAVE_GSSAPI */
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...
176 if (!_cups_strcasecmp(scheme
, "Negotiate"))
179 * Kerberos authentication...
182 if (_cupsSetNegotiateAuthString(http
, method
, resource
))
184 http
->status
= HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED
;
191 #endif /* HAVE_GSSAPI */
192 if (_cups_strcasecmp(scheme
, "Basic") && _cups_strcasecmp(scheme
, "Digest"))
193 continue; /* Not supported (yet) */
196 * See if we should retry the current username:password...
199 if ((http
->digest_tries
> 1 || !http
->userpass
[0]) && (!_cups_strcasecmp(scheme
, "Basic") || (!_cups_strcasecmp(scheme
, "Digest"))))
202 * Nope - get a new password from the user...
205 char default_username
[HTTP_MAX_VALUE
];
206 /* Default username */
210 if (!cg
->lang_default
)
211 cg
->lang_default
= cupsLangDefault();
213 if (cups_auth_param(schemedata
, "username", default_username
, sizeof(default_username
)))
214 cupsSetUser(default_username
);
216 snprintf(prompt
, sizeof(prompt
), _cupsLangString(cg
->lang_default
, _("Password for %s on %s? ")), cupsUser(), http
->hostname
[0] == '/' ? "localhost" : http
->hostname
);
218 http
->digest_tries
= _cups_strncasecmp(scheme
, "Digest", 6) != 0;
219 http
->userpass
[0] = '\0';
221 if ((password
= cupsGetPassword2(prompt
, http
, method
, resource
)) == NULL
)
223 http
->status
= HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED
;
227 snprintf(http
->userpass
, sizeof(http
->userpass
), "%s:%s", cupsUser(), password
);
229 else if (http
->status
== HTTP_STATUS_UNAUTHORIZED
)
230 http
->digest_tries
++;
232 if (http
->status
== HTTP_STATUS_UNAUTHORIZED
&& http
->digest_tries
>= 3)
234 DEBUG_printf(("1cupsDoAuthentication: Too many authentication tries (%d)", http
->digest_tries
));
236 http
->status
= HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED
;
241 * Got a password; encode it for the server...
244 if (!_cups_strcasecmp(scheme
, "Basic"))
247 * Basic authentication...
250 char encode
[256]; /* Base64 buffer */
252 httpEncode64_2(encode
, sizeof(encode
), http
->userpass
, (int)strlen(http
->userpass
));
253 httpSetAuthString(http
, "Basic", encode
);
256 else if (!_cups_strcasecmp(scheme
, "Digest"))
259 * Digest authentication...
262 char nonce
[HTTP_MAX_VALUE
]; /* nonce="xyz" string */
264 cups_auth_param(schemedata
, "algorithm", http
->algorithm
, sizeof(http
->algorithm
));
265 cups_auth_param(schemedata
, "opaque", http
->opaque
, sizeof(http
->opaque
));
266 cups_auth_param(schemedata
, "nonce", nonce
, sizeof(nonce
));
267 cups_auth_param(schemedata
, "realm", http
->realm
, sizeof(http
->realm
));
269 if (_httpSetDigestAuthString(http
, nonce
, method
, resource
))
274 if (http
->authstring
)
276 DEBUG_printf(("1cupsDoAuthentication: authstring=\"%s\"", http
->authstring
));
282 DEBUG_printf(("1cupsDoAuthentication: Unknown auth type: \"%s\"", www_auth
));
283 http
->status
= HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED
;
292 * '_cupsSetNegotiateAuthString()' - Set the Kerberos authentication string.
295 int /* O - 0 on success, -1 on error */
296 _cupsSetNegotiateAuthString(
297 http_t
*http
, /* I - Connection to server */
298 const char *method
, /* I - Request method ("GET", "POST", "PUT") */
299 const char *resource
) /* I - Resource path */
301 OM_uint32 minor_status
, /* Minor status code */
302 major_status
; /* Major status code */
303 gss_buffer_desc output_token
= GSS_C_EMPTY_BUFFER
;
312 * If the weak-linked GSSAPI/Kerberos library is not present, don't try
316 if (&gss_init_sec_context
== NULL
)
318 DEBUG_puts("1_cupsSetNegotiateAuthString: Weak-linked GSSAPI/Kerberos "
319 "framework is not present");
322 # endif /* __APPLE__ */
324 if (http
->gssname
== GSS_C_NO_NAME
)
326 http
->gssname
= cups_gss_getname(http
, _cupsGSSServiceName());
329 if (http
->gssctx
!= GSS_C_NO_CONTEXT
)
331 gss_delete_sec_context(&minor_status
, &http
->gssctx
, GSS_C_NO_BUFFER
);
332 http
->gssctx
= GSS_C_NO_CONTEXT
;
335 major_status
= gss_init_sec_context(&minor_status
, GSS_C_NO_CREDENTIAL
,
337 http
->gssname
, http
->gssmech
,
338 GSS_C_MUTUAL_FLAG
| GSS_C_INTEG_FLAG
,
340 GSS_C_NO_CHANNEL_BINDINGS
,
341 GSS_C_NO_BUFFER
, &http
->gssmech
,
342 &output_token
, NULL
, NULL
);
344 # ifdef HAVE_GSS_ACQUIRE_CRED_EX_F
345 if (major_status
== GSS_S_NO_CRED
)
348 * Ask the user for credentials...
351 char prompt
[1024], /* Prompt for user */
352 userbuf
[256]; /* Kerberos username */
353 const char *username
, /* Username string */
354 *password
; /* Password string */
355 _cups_gss_acquire_t data
; /* Callback data */
356 gss_auth_identity_desc identity
; /* Kerberos user identity */
357 _cups_globals_t
*cg
= _cupsGlobals();
358 /* Per-thread global data */
360 if (!cg
->lang_default
)
361 cg
->lang_default
= cupsLangDefault();
363 snprintf(prompt
, sizeof(prompt
),
364 _cupsLangString(cg
->lang_default
, _("Password for %s on %s? ")),
365 cupsUser(), http
->gsshost
);
367 if ((password
= cupsGetPassword2(prompt
, http
, method
, resource
)) == NULL
)
371 * Try to acquire credentials...
374 username
= cupsUser();
375 if (!strchr(username
, '@'))
377 snprintf(userbuf
, sizeof(userbuf
), "%s@%s", username
, http
->gsshost
);
381 identity
.type
= GSS_AUTH_IDENTITY_TYPE_1
;
383 identity
.username
= (char *)username
;
384 identity
.realm
= (char *)"";
385 identity
.password
= (char *)password
;
386 identity
.credentialsRef
= NULL
;
388 data
.sem
= dispatch_semaphore_create(0);
394 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
);
396 if (major_status
== GSS_S_COMPLETE
)
398 dispatch_semaphore_wait(data
.sem
, DISPATCH_TIME_FOREVER
);
399 major_status
= data
.major
;
402 dispatch_release(data
.sem
);
404 if (major_status
== GSS_S_COMPLETE
)
406 OM_uint32 release_minor
; /* Minor status from releasing creds */
408 major_status
= gss_init_sec_context(&minor_status
, data
.creds
,
410 http
->gssname
, http
->gssmech
,
411 GSS_C_MUTUAL_FLAG
| GSS_C_INTEG_FLAG
,
413 GSS_C_NO_CHANNEL_BINDINGS
,
414 GSS_C_NO_BUFFER
, &http
->gssmech
,
415 &output_token
, NULL
, NULL
);
416 gss_release_cred(&release_minor
, &data
.creds
);
420 # endif /* HAVE_GSS_ACQUIRED_CRED_EX_F */
422 if (GSS_ERROR(major_status
))
424 cups_gss_printf(major_status
, minor_status
,
425 "_cupsSetNegotiateAuthString: Unable to initialize "
431 else if (major_status
== GSS_S_CONTINUE_NEEDED
)
432 cups_gss_printf(major_status
, minor_status
,
433 "_cupsSetNegotiateAuthString: Continuation needed!");
436 if (output_token
.length
> 0 && output_token
.length
<= 65536)
439 * Allocate the authorization string since Windows KDCs can have
440 * arbitrarily large credentials...
443 int authsize
= 10 + /* "Negotiate " */
444 (int)output_token
.length
* 4 / 3 + 1 + 1;
447 httpSetAuthString(http
, NULL
, NULL
);
449 if ((http
->authstring
= malloc((size_t)authsize
)) == NULL
)
451 http
->authstring
= http
->_authstring
;
452 authsize
= sizeof(http
->_authstring
);
455 strlcpy(http
->authstring
, "Negotiate ", (size_t)authsize
);
456 httpEncode64_2(http
->authstring
+ 10, authsize
- 10, output_token
.value
,
457 (int)output_token
.length
);
459 gss_release_buffer(&minor_status
, &output_token
);
463 DEBUG_printf(("1_cupsSetNegotiateAuthString: Kerberos credentials too "
464 "large - %d bytes!", (int)output_token
.length
));
465 gss_release_buffer(&minor_status
, &output_token
);
472 #endif /* HAVE_GSSAPI */
476 * 'cups_auth_find()' - Find the named WWW-Authenticate scheme.
478 * The "www_authenticate" parameter points to the current position in the header.
480 * Returns @code NULL@ if the auth scheme is not present.
483 static const char * /* O - Start of matching scheme or @code NULL@ if not found */
484 cups_auth_find(const char *www_authenticate
, /* I - Pointer into WWW-Authenticate header */
485 const char *scheme
) /* I - Authentication scheme */
487 size_t schemelen
= strlen(scheme
); /* Length of scheme */
490 DEBUG_printf(("8cups_auth_find(www_authenticate=\"%s\", scheme=\"%s\"(%d))", www_authenticate
, scheme
, (int)schemelen
));
492 while (*www_authenticate
)
495 * Skip leading whitespace and commas...
498 DEBUG_printf(("9cups_auth_find: Before whitespace: \"%s\"", www_authenticate
));
499 while (isspace(*www_authenticate
& 255) || *www_authenticate
== ',')
501 DEBUG_printf(("9cups_auth_find: After whitespace: \"%s\"", www_authenticate
));
504 * See if this is "Scheme" followed by whitespace or the end of the string.
507 if (!strncmp(www_authenticate
, scheme
, schemelen
) && (isspace(www_authenticate
[schemelen
] & 255) || www_authenticate
[schemelen
] == ',' || !www_authenticate
[schemelen
]))
510 * Yes, this is the start of the scheme-specific information...
513 DEBUG_printf(("9cups_auth_find: Returning \"%s\".", www_authenticate
));
515 return (www_authenticate
);
519 * Skip the scheme name or param="value" string...
522 while (!isspace(*www_authenticate
& 255) && *www_authenticate
)
524 if (*www_authenticate
== '\"')
527 * Skip quoted value...
531 while (*www_authenticate
&& *www_authenticate
!= '\"')
534 DEBUG_printf(("9cups_auth_find: After quoted: \"%s\"", www_authenticate
));
540 DEBUG_printf(("9cups_auth_find: After skip: \"%s\"", www_authenticate
));
543 DEBUG_puts("9cups_auth_find: Returning NULL.");
550 * 'cups_auth_param()' - Copy the value for the named authentication parameter,
554 static const char * /* O - Parameter value or @code NULL@ if not present */
555 cups_auth_param(const char *scheme
, /* I - Pointer to auth data */
556 const char *name
, /* I - Name of parameter */
557 char *value
, /* I - Value buffer */
558 size_t valsize
) /* I - Size of value buffer */
560 char *valptr
= value
, /* Pointer into value buffer */
561 *valend
= value
+ valsize
- 1; /* Pointer to end of buffer */
562 size_t namelen
= strlen(name
); /* Name length */
563 int param
; /* Is this a parameter? */
566 DEBUG_printf(("8cups_auth_param(scheme=\"%s\", name=\"%s\", value=%p, valsize=%d)", scheme
, name
, (void *)value
, (int)valsize
));
568 while (!isspace(*scheme
& 255) && *scheme
)
573 while (isspace(*scheme
& 255) || *scheme
== ',')
576 if (!strncmp(scheme
, name
, namelen
) && scheme
[namelen
] == '=')
579 * Found the parameter, copy the value...
582 scheme
+= namelen
+ 1;
587 while (*scheme
&& *scheme
!= '\"')
597 while (*scheme
&& strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~+/=", *scheme
))
608 DEBUG_printf(("9cups_auth_param: Returning \"%s\".", value
));
614 * Skip the param=value string...
619 while (!isspace(*scheme
& 255) && *scheme
)
623 else if (*scheme
== '\"')
626 * Skip quoted value...
630 while (*scheme
&& *scheme
!= '\"')
638 * If this wasn't a parameter, we are at the end of this scheme's
648 DEBUG_puts("9cups_auth_param: Returning NULL.");
655 * 'cups_auth_scheme()' - Get the (next) WWW-Authenticate scheme.
657 * The "www_authenticate" parameter points to the current position in the header.
659 * Returns @code NULL@ if there are no (more) auth schemes present.
662 static const char * /* O - Start of scheme or @code NULL@ if not found */
663 cups_auth_scheme(const char *www_authenticate
, /* I - Pointer into WWW-Authenticate header */
664 char *scheme
, /* I - Scheme name buffer */
665 size_t schemesize
) /* I - Size of buffer */
667 const char *start
; /* Start of scheme data */
668 char *sptr
= scheme
, /* Pointer into scheme buffer */
669 *send
= scheme
+ schemesize
- 1;/* End of scheme buffer */
670 int param
; /* Is this a parameter? */
673 DEBUG_printf(("8cups_auth_scheme(www_authenticate=\"%s\", scheme=%p, schemesize=%d)", www_authenticate
, (void *)scheme
, (int)schemesize
));
675 while (*www_authenticate
)
678 * Skip leading whitespace and commas...
681 while (isspace(*www_authenticate
& 255) || *www_authenticate
== ',')
685 * Parse the scheme name or param="value" string...
688 for (sptr
= scheme
, start
= www_authenticate
, param
= 0; *www_authenticate
&& *www_authenticate
!= ',' && !isspace(*www_authenticate
& 255); www_authenticate
++)
690 if (*www_authenticate
== '=')
692 else if (!param
&& sptr
< send
)
693 *sptr
++ = *www_authenticate
;
694 else if (*www_authenticate
== '\"')
697 * Skip quoted value...
701 while (*www_authenticate
&& *www_authenticate
!= '\"')
706 if (sptr
> scheme
&& !param
)
710 DEBUG_printf(("9cups_auth_scheme: Returning \"%s\".", start
));
718 DEBUG_puts("9cups_auth_scheme: Returning NULL.");
725 # ifdef HAVE_GSS_ACQUIRE_CRED_EX_F
727 * 'cups_gss_acquire()' - Kerberos credentials callback.
731 void *ctx
, /* I - Caller context */
732 OM_uint32 major
, /* I - Major error code */
733 gss_status_id_t status
, /* I - Status (unused) */
734 gss_cred_id_t creds
, /* I - Credentials (if any) */
735 gss_OID_set oids
, /* I - Mechanism OIDs (unused) */
736 OM_uint32 time_rec
) /* I - Timestamp (unused) */
738 uint32_t min
; /* Minor error code */
739 _cups_gss_acquire_t
*data
; /* Callback data */
745 data
= (_cups_gss_acquire_t
*)ctx
;
749 gss_release_oid_set(&min
, &oids
);
750 dispatch_semaphore_signal(data
->sem
);
752 # endif /* HAVE_GSS_ACQUIRE_CRED_EX_F */
756 * 'cups_gss_getname()' - Get CUPS service credentials for authentication.
759 static gss_name_t
/* O - Server name */
761 http_t
*http
, /* I - Connection to server */
762 const char *service_name
) /* I - Service name */
764 gss_buffer_desc token
= GSS_C_EMPTY_BUFFER
;
766 OM_uint32 major_status
, /* Major status code */
767 minor_status
; /* Minor status code */
768 gss_name_t server_name
; /* Server name */
769 char buf
[1024]; /* Name buffer */
772 DEBUG_printf(("7cups_gss_getname(http=%p, service_name=\"%s\")", http
,
777 * Get the hostname...
780 if (!http
->gsshost
[0])
782 httpGetHostname(http
, http
->gsshost
, sizeof(http
->gsshost
));
784 if (!strcmp(http
->gsshost
, "localhost"))
786 if (gethostname(http
->gsshost
, sizeof(http
->gsshost
)) < 0)
788 DEBUG_printf(("1cups_gss_getname: gethostname() failed: %s",
790 http
->gsshost
[0] = '\0';
794 if (!strchr(http
->gsshost
, '.'))
797 * The hostname is not a FQDN, so look it up...
800 struct hostent
*host
; /* Host entry to get FQDN */
802 if ((host
= gethostbyname(http
->gsshost
)) != NULL
&& host
->h_name
)
805 * Use the resolved hostname...
808 strlcpy(http
->gsshost
, host
->h_name
, sizeof(http
->gsshost
));
812 DEBUG_printf(("1cups_gss_getname: gethostbyname(\"%s\") failed.",
814 http
->gsshost
[0] = '\0';
822 * Get a service name we can use for authentication purposes...
825 snprintf(buf
, sizeof(buf
), "%s@%s", service_name
, http
->gsshost
);
827 DEBUG_printf(("8cups_gss_getname: Looking up \"%s\".", buf
));
830 token
.length
= strlen(buf
);
831 server_name
= GSS_C_NO_NAME
;
832 major_status
= gss_import_name(&minor_status
, &token
,
833 GSS_C_NT_HOSTBASED_SERVICE
,
836 if (GSS_ERROR(major_status
))
838 cups_gss_printf(major_status
, minor_status
,
839 "cups_gss_getname: gss_import_name() failed");
843 return (server_name
);
849 * 'cups_gss_printf()' - Show debug error messages from GSSAPI.
853 cups_gss_printf(OM_uint32 major_status
,/* I - Major status code */
854 OM_uint32 minor_status
,/* I - Minor status code */
855 const char *message
) /* I - Prefix for error message */
857 OM_uint32 err_major_status
, /* Major status code for display */
858 err_minor_status
; /* Minor status code for display */
859 OM_uint32 msg_ctx
; /* Message context */
860 gss_buffer_desc major_status_string
= GSS_C_EMPTY_BUFFER
,
861 /* Major status message */
862 minor_status_string
= GSS_C_EMPTY_BUFFER
;
863 /* Minor status message */
867 err_major_status
= gss_display_status(&err_minor_status
,
872 &major_status_string
);
874 if (!GSS_ERROR(err_major_status
))
875 gss_display_status(&err_minor_status
, minor_status
, GSS_C_MECH_CODE
,
876 GSS_C_NULL_OID
, &msg_ctx
, &minor_status_string
);
878 DEBUG_printf(("1%s: %s, %s", message
, (char *)major_status_string
.value
,
879 (char *)minor_status_string
.value
));
881 gss_release_buffer(&err_minor_status
, &major_status_string
);
882 gss_release_buffer(&err_minor_status
, &minor_status_string
);
885 #endif /* HAVE_GSSAPI */
889 * 'cups_local_auth()' - Get the local authorization certificate if
890 * available/applicable.
893 static int /* O - 0 if available */
894 /* 1 if not available */
896 cups_local_auth(http_t
*http
) /* I - HTTP connection to server */
898 #if defined(WIN32) || defined(__EMX__)
900 * Currently WIN32 and OS-2 do not support the CUPS server...
905 int pid
; /* Current process ID */
906 FILE *fp
; /* Certificate file */
907 char trc
[16], /* Try Root Certificate parameter */
908 filename
[1024]; /* Certificate filename */
909 const char *www_auth
, /* WWW-Authenticate header */
910 *schemedata
; /* Data for the named auth scheme */
911 _cups_globals_t
*cg
= _cupsGlobals(); /* Global data */
912 # if defined(HAVE_AUTHORIZATION_H)
913 OSStatus status
; /* Status */
914 AuthorizationItem auth_right
; /* Authorization right */
915 AuthorizationRights auth_rights
; /* Authorization rights */
916 AuthorizationFlags auth_flags
; /* Authorization flags */
917 AuthorizationExternalForm auth_extrn
; /* Authorization ref external */
918 char auth_key
[1024]; /* Buffer */
919 char buffer
[1024]; /* Buffer */
920 # endif /* HAVE_AUTHORIZATION_H */
923 DEBUG_printf(("7cups_local_auth(http=%p) hostaddr=%s, hostname=\"%s\"", (void *)http
, httpAddrString(http
->hostaddr
, filename
, sizeof(filename
)), http
->hostname
));
926 * See if we are accessing localhost...
929 if (!httpAddrLocalhost(http
->hostaddr
) && _cups_strcasecmp(http
->hostname
, "localhost") != 0)
931 DEBUG_puts("8cups_local_auth: Not a local connection!");
935 www_auth
= httpGetField(http
, HTTP_FIELD_WWW_AUTHENTICATE
);
937 # if defined(HAVE_AUTHORIZATION_H)
939 * Delete any previous authorization reference...
944 AuthorizationFree(http
->auth_ref
, kAuthorizationFlagDefaults
);
945 http
->auth_ref
= NULL
;
948 if (!getenv("GATEWAY_INTERFACE") && (schemedata
= cups_auth_find(www_auth
, "AuthRef")) != NULL
&& cups_auth_param(schemedata
, "key", auth_key
, sizeof(auth_key
)))
950 status
= AuthorizationCreate(NULL
, kAuthorizationEmptyEnvironment
, kAuthorizationFlagDefaults
, &http
->auth_ref
);
951 if (status
!= errAuthorizationSuccess
)
953 DEBUG_printf(("8cups_local_auth: AuthorizationCreate() returned %d (%s)",
954 (int)status
, cssmErrorString(status
)));
958 auth_right
.name
= auth_key
;
959 auth_right
.valueLength
= 0;
960 auth_right
.value
= NULL
;
961 auth_right
.flags
= 0;
963 auth_rights
.count
= 1;
964 auth_rights
.items
= &auth_right
;
966 auth_flags
= kAuthorizationFlagDefaults
|
967 kAuthorizationFlagPreAuthorize
|
968 kAuthorizationFlagInteractionAllowed
|
969 kAuthorizationFlagExtendRights
;
971 status
= AuthorizationCopyRights(http
->auth_ref
, &auth_rights
,
972 kAuthorizationEmptyEnvironment
,
974 if (status
== errAuthorizationSuccess
)
975 status
= AuthorizationMakeExternalForm(http
->auth_ref
, &auth_extrn
);
977 if (status
== errAuthorizationSuccess
)
980 * Set the authorization string and return...
983 httpEncode64_2(buffer
, sizeof(buffer
), (void *)&auth_extrn
,
986 httpSetAuthString(http
, "AuthRef", buffer
);
988 DEBUG_printf(("8cups_local_auth: Returning authstring=\"%s\"",
992 else if (status
== errAuthorizationCanceled
)
995 DEBUG_printf(("9cups_local_auth: AuthorizationCopyRights() returned %d (%s)",
996 (int)status
, cssmErrorString(status
)));
999 * Fall through to try certificates...
1002 # endif /* HAVE_AUTHORIZATION_H */
1005 if (cups_auth_find(www_auth
, "Negotiate"))
1007 # endif /* HAVE_GSSAPI */
1009 # if defined(SO_PEERCRED) && defined(AF_LOCAL)
1011 * See if we can authenticate using the peer credentials provided over a
1012 * domain socket; if so, specify "PeerCred username" as the authentication
1016 if (http
->hostaddr
->addr
.sa_family
== AF_LOCAL
&&
1017 !getenv("GATEWAY_INTERFACE") && /* Not via CGI programs... */
1018 cups_auth_find(www_auth
, "PeerCred"))
1021 * Verify that the current cupsUser() matches the current UID...
1024 struct passwd
*pwd
; /* Password information */
1025 const char *username
; /* Current username */
1027 username
= cupsUser();
1029 if ((pwd
= getpwnam(username
)) != NULL
&& pwd
->pw_uid
== getuid())
1031 httpSetAuthString(http
, "PeerCred", username
);
1033 DEBUG_printf(("8cups_local_auth: Returning authstring=\"%s\"",
1039 # endif /* SO_PEERCRED && AF_LOCAL */
1041 if ((schemedata
= cups_auth_find(www_auth
, "Local")) == NULL
)
1045 * Try opening a certificate file for this PID. If that fails,
1046 * try the root certificate...
1050 snprintf(filename
, sizeof(filename
), "%s/certs/%d", cg
->cups_statedir
, pid
);
1051 if ((fp
= fopen(filename
, "r")) == NULL
&& pid
> 0)
1054 * No certificate for this PID; see if we can get the root certificate...
1057 DEBUG_printf(("9cups_local_auth: Unable to open file \"%s\": %s", filename
, strerror(errno
)));
1059 if (!cups_auth_param(schemedata
, "trc", trc
, sizeof(trc
)))
1062 * Scheduler doesn't want us to use the root certificate...
1068 snprintf(filename
, sizeof(filename
), "%s/certs/0", cg
->cups_statedir
);
1069 if ((fp
= fopen(filename
, "r")) == NULL
)
1070 DEBUG_printf(("9cups_local_auth: Unable to open file \"%s\": %s", filename
, strerror(errno
)));
1076 * Read the certificate from the file...
1079 char certificate
[33], /* Certificate string */
1080 *certptr
; /* Pointer to certificate string */
1082 certptr
= fgets(certificate
, sizeof(certificate
), fp
);
1088 * Set the authorization string and return...
1091 httpSetAuthString(http
, "Local", certificate
);
1093 DEBUG_printf(("8cups_local_auth: Returning authstring=\"%s\"",
1101 #endif /* WIN32 || __EMX__ */