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1 /*
2 * Copyright (c) 2000-2004,2007,2011-2012 Apple Inc. All Rights Reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23
24
25 /*
26 * Authorization.h -- APIs for implementing access control in applications
27 * and daemons.
28 */
29
30 #ifndef _SECURITY_AUTHORIZATION_H_
31 #define _SECURITY_AUTHORIZATION_H_
32
33 #include <TargetConditionals.h>
34 #include <MacTypes.h>
35 #include <Availability.h>
36 #include <CoreFoundation/CFAvailability.h>
37 #include <CoreFoundation/CFBase.h>
38 #include <CoreFoundation/CFArray.h>
39
40 #include <stdio.h>
41
42 #if defined(__cplusplus)
43 extern "C" {
44 #endif
45
46 CF_ASSUME_NONNULL_BEGIN
47
48 /*!
49 @header Authorization
50 Version 1.0 10/16/2000
51
52 The Authorization API contains all the APIs that a application or tool that need pre-authorization or need an authorization desision made.
53
54 A typical use cases are a preference panel that would start off calling AuthorizationCreate() (without UI) to get an authorization object. Then call AuthorizationCopyRights() to figure out what is currently allowed.
55
56 If any of the operations that the preference panel wishes to perform are currently not allowed the lock icon in the window would show up in the locked state. Otherwise it would show up unlocked.
57
58 When the user locks the lock AuthorizationFree() is called with the kAuthorizationFlagDestroyRights to destroy any authorization rights that have been acquired.
59
60 When the user unlocks the lock AuthorizationCreate() is called with the kAuthorizationFlagInteractionAllowed and kAuthorizationFlagExtendRights flags to obtain all required rights. The old authorization object can be freed by calling AuthorizationFree() with no flags.
61
62 */
63
64
65
66 /*!
67 @defined kAuthorizationEmptyEnvironment
68 Parameter to specify to AuthorizationCreate when no environment is being provided.
69 */
70 #define kAuthorizationEmptyEnvironment NULL
71
72
73 /*!
74 @enum AuthorizationStatus
75 Error codes returned by Authorization API.
76 */
77
78 /*
79 Note: the comments that appear after these errors are used to create SecErrorMessages.strings.
80 The comments must not be multi-line, and should be in a form meaningful to an end user. If
81 a different or additional comment is needed, it can be put in the header doc format, or on a
82 line that does not start with errZZZ.
83
84 errAuthorizationSuccess can't include a string as it's also errSecSuccess in libsecurity_keychain/lib/SecBase.h
85 */
86
87 CF_ENUM(OSStatus) {
88 errAuthorizationSuccess = 0,
89 errAuthorizationInvalidSet = -60001, /* The authorization rights are invalid. */
90 errAuthorizationInvalidRef = -60002, /* The authorization reference is invalid. */
91 errAuthorizationInvalidTag = -60003, /* The authorization tag is invalid. */
92 errAuthorizationInvalidPointer = -60004, /* The returned authorization is invalid. */
93 errAuthorizationDenied = -60005, /* The authorization was denied. */
94 errAuthorizationCanceled = -60006, /* The authorization was canceled by the user. */
95 errAuthorizationInteractionNotAllowed = -60007, /* The authorization was denied since no user interaction was possible. */
96 errAuthorizationInternal = -60008, /* Unable to obtain authorization for this operation. */
97 errAuthorizationExternalizeNotAllowed = -60009, /* The authorization is not allowed to be converted to an external format. */
98 errAuthorizationInternalizeNotAllowed = -60010, /* The authorization is not allowed to be created from an external format. */
99 errAuthorizationInvalidFlags = -60011, /* The provided option flag(s) are invalid for this authorization operation. */
100 errAuthorizationToolExecuteFailure = -60031, /* The specified program could not be executed. */
101 errAuthorizationToolEnvironmentError = -60032, /* An invalid status was returned during execution of a privileged tool. */
102 errAuthorizationBadAddress = -60033, /* The requested socket address is invalid (must be 0-1023 inclusive). */
103 };
104
105
106 /*!
107 @typedef AuthorizationFlags
108 Optional flags passed in to several Authorization APIs.
109 See the description of AuthorizationCreate, AuthorizationCopyRights and AuthorizationFree for a description of how they affect those calls.
110 */
111 typedef CF_OPTIONS(UInt32, AuthorizationFlags) {
112 kAuthorizationFlagDefaults = 0,
113 kAuthorizationFlagInteractionAllowed = (1 << 0),
114 kAuthorizationFlagExtendRights = (1 << 1),
115 kAuthorizationFlagPartialRights = (1 << 2),
116 kAuthorizationFlagDestroyRights = (1 << 3),
117 kAuthorizationFlagPreAuthorize = (1 << 4),
118
119 // private bits (do not use)
120 kAuthorizationFlagNoData = (1 << 20)
121 };
122
123
124 /*!
125 @enum AuthorizationRightFlags
126 Flags returned in the flags field of ItemSet Items when calling AuthorizationCopyRights().
127 */
128 enum {
129 kAuthorizationFlagCanNotPreAuthorize = (1 << 0)
130 };
131
132
133 /*!
134 @typedef AuthorizationRef
135 Opaque reference to an authorization object.
136 */
137 typedef const struct AuthorizationOpaqueRef *AuthorizationRef;
138
139
140 /*!
141 @typedef AuthorizationString
142 A zero terminated string in UTF-8 encoding.
143 */
144 typedef const char *AuthorizationString;
145
146
147 /*!
148 @typedef AuthorizationItem
149 Each AuthorizationItem describes a single string-named item with optional
150 parameter value. The value must be contiguous memory of valueLength bytes;
151 internal structure is defined separately for each name.
152
153 @field name name of the item, as an AuthorizationString. Mandatory.
154 @field valueLength Number of bytes in parameter value. Must be 0 if no parameter value.
155 @field value Pointer to the optional parameter value associated with name.
156 Must be NULL if no parameter value.
157 @field flags Reserved field. Must be set to 0 on creation. Do not modify after that.
158 */
159 typedef struct {
160 AuthorizationString name;
161 size_t valueLength;
162 void * __nullable value;
163 UInt32 flags;
164 } AuthorizationItem;
165
166
167 /*!
168 @typedef AuthorizationItemSet
169 An AuthorizationItemSet structure represents a set of zero or more AuthorizationItems. Since it is a set it should not contain any identical AuthorizationItems.
170
171 @field count Number of items identified by items.
172 @field items Pointer to an array of items.
173 */
174 typedef struct {
175 UInt32 count;
176 AuthorizationItem * __nullable items;
177 } AuthorizationItemSet;
178
179
180 static const size_t kAuthorizationExternalFormLength = 32;
181 /*!
182 @typedef AuthorizationExternalForm
183 An AuthorizationExternalForm structure can hold the externalized form of
184 an AuthorizationRef. As such, it can be transmitted across IPC channels
185 to other processes, which can re-internalize it to recover a valid AuthorizationRef
186 handle.
187 The data contained in an AuthorizationExternalForm should be considered opaque.
188
189 SECURITY NOTE: Applications should take care to not disclose the AuthorizationExternalForm to
190 potential attackers since it would authorize rights to them.
191 */
192 typedef struct {
193 char bytes[kAuthorizationExternalFormLength];
194 } AuthorizationExternalForm;
195
196
197
198 /*!
199 @typedef AuthorizationRights
200 An AuthorizationItemSet representing a set of rights each with an associated argument (value).
201 Each argument value is as defined for the specific right they belong to. Argument values may not contain pointers as the should be copyable to different address spaces.
202 */
203 typedef AuthorizationItemSet AuthorizationRights;
204
205
206 /*!
207 @typedef AuthorizationEnvironment
208 An AuthorizationItemSet representing environmental information of potential use
209 to authorization decisions.
210 */
211 typedef AuthorizationItemSet AuthorizationEnvironment;
212
213
214 /*!
215 @function AuthorizationCreate
216 Create a new autorization object which can be used in other authorization calls. When the authorization is no longer needed AuthorizationFree should be called.
217
218 When the kAuthorizationFlagInteractionAllowed flag is set, user interaction will happen when required. Failing to set this flag will result in this call failing with a errAuthorizationInteractionNotAllowed status when interaction is required.
219
220 Setting the kAuthorizationFlagExtendRights flag will extend the currently available rights. If this flag is set the returned AuthorizationRef will grant all the rights requested when errAuthorizationSuccess is returned. If this flag is not set the operation will almost certainly succeed, but no attempt will be made to make the requested rights availible.
221 Call AuthorizationCopyRights to figure out which of the requested rights are granted by the returned AuthorizationRef.
222
223 Setting the kAuthorizationFlagPartialRights flag will cause this call to succeed if only some of the requested rights are being granted by the returned AuthorizationRef. Unless this flag is set this API will fail if not all the requested rights could be obtained.
224
225 Setting the kAuthorizationFlagDestroyRights flag will prevent any rights obtained during this call from being preserved after returning from this API (This is most useful when the authorization parameter is NULL and the caller doesn't want to affect the session state in any way).
226
227 Setting the kAuthorizationFlagPreAuthorize flag will pre authorize the requested rights so that at a later time -- by calling AuthorizationMakeExternalForm() follow by AuthorizationCreateFromExternalForm() -- the obtained rights can be used in a different process. Rights that can't be preauthorized will be treated as if they were authorized for the sake of returning an error (in other words if all rights are either authorized or could not be preauthorized this call will still succeed).
228 The rights which could not be preauthorized are not currently authorized and may fail to authorize when a later call to AuthorizationCopyRights() is made, unless the kAuthorizationFlagExtendRights and kAuthorizationFlagInteractionAllowed flags are set. Even then they might still fail if the user does not supply the correct credentials.
229 The reason for passing in this flag is to provide correct audit trail information and to avoid unnecessary user interaction.
230
231 @param rights (input/optional) An AuthorizationItemSet containing rights for which authorization is being requested. If none are specified the resulting AuthorizationRef will authorize nothing at all.
232 @param environment (input/optional) An AuthorizationItemSet containing environment state used when making the autorization decision. See the AuthorizationEnvironment type for details.
233 @param flags (input) options specified by the AuthorizationFlags enum. set all unused bits to zero to allow for future expansion.
234 @param authorization (output optional) A pointer to an AuthorizationRef to be returned. When the returned AuthorizationRef is no longer needed AuthorizationFree should be called to prevent anyone from using the acquired rights. If NULL is specified no new rights are returned, but the system will attempt to authorize all the requested rights and return the appropriate status.
235
236 @result errAuthorizationSuccess 0 authorization or all requested rights succeeded.
237
238 errAuthorizationDenied -60005 The authorization for one or more of the requested rights was denied.
239
240 errAuthorizationCanceled -60006 The authorization was canceled by the user.
241
242 errAuthorizationInteractionNotAllowed -60007 The authorization was denied since no interaction with the user was allowed.
243 */
244 OSStatus AuthorizationCreate(const AuthorizationRights * __nullable rights,
245 const AuthorizationEnvironment * __nullable environment,
246 AuthorizationFlags flags,
247 AuthorizationRef __nullable * __nullable authorization);
248
249
250 /*!
251 @function AuthorizationFree
252 Destroy an AutorizationRef object. If the kAuthorizationFlagDestroyRights flag is passed,
253 any rights associated with the authorization are lost. Otherwise, only local resources
254 are released, and the rights may still be available to other clients.
255
256 Setting the kAuthorizationFlagDestroyRights flag will prevent any rights that were obtained by the specified authorization object to be preserved after returning from this API. This effectivaly locks down all potentially shared authorizations.
257
258 @param authorization (input) The authorization object on which this operation is performed.
259
260 @param flags (input) Bit mask of option flags to this call.
261
262 @result errAuthorizationSuccess 0 No error.
263
264 errAuthorizationInvalidRef -60002 The authorization parameter is invalid.
265 */
266 OSStatus AuthorizationFree(AuthorizationRef authorization, AuthorizationFlags flags);
267
268
269 /*!
270 @function AuthorizationCopyRights
271 Given a set of rights, return the subset that is currently authorized
272 by the AuthorizationRef given.
273
274 When the kAuthorizationFlagInteractionAllowed flag is set, user interaction will happen when required. Failing to set this flag will result in this call failing with a errAuthorizationInteractionNotAllowed status when interaction is required.
275
276 Setting the kAuthorizationFlagExtendRights flag will extend the currently available rights.
277
278 Setting the kAuthorizationFlagPartialRights flag will cause this call to succeed if only some of the requested rights are being granted by the returned AuthorizationRef. Unless this flag is set this API will fail if not all the requested rights could be obtained.
279
280 Setting the kAuthorizationFlagDestroyRights flag will prevent any additional rights obtained during this call from being preserved after returning from this API.
281
282 Setting the kAuthorizationFlagPreAuthorize flag will pre authorize the requested rights so that at a later time -- by calling AuthorizationMakeExternalForm() follow by AuthorizationCreateFromExternalForm() -- the obtained rights can be used in a different process. Rights that can't be preauthorized will be treated as if they were authorized for the sake of returning an error (in other words if all rights are either authorized or could not be preauthorized this call will still succeed), and they will be returned in authorizedRights with their kAuthorizationFlagCanNotPreAuthorize bit in the flags field set to 1.
283 The rights which could not be preauthorized are not currently authorized and may fail to authorize when a later call to AuthorizationCopyRights() is made, unless the kAuthorizationFlagExtendRights and kAuthorizationFlagInteractionAllowed flags are set. Even then they might still fail if the user does not supply the correct credentials.
284 The reason for passing in this flag is to provide correct audit trail information and to avoid unnecessary user interaction.
285
286 Setting the kAuthorizationFlagPreAuthorize flag will pre authorize the requested rights so that at a later time -- by calling AuthorizationMakeExternalForm() follow by AuthorizationCreateFromExternalForm() -- the obtained rights can be used in a different process. When this flags is specified rights that can't be preauthorized will be returned as if they were authorized with their kAuthorizationFlagCanNotPreAuthorize bit in the flags field set to 1. These rights are not currently authorized and may fail to authorize later unless kAuthorizationFlagExtendRights and kAuthorizationFlagInteractionAllowed flags are set when the actual authorization is done. And even then they might still fail if the user does not supply the correct credentials.
287
288 @param authorization (input) The authorization object on which this operation is performed.
289 @param rights (input) A rights set (see AuthorizationCreate).
290 @param environment (input/optional) An AuthorizationItemSet containing environment state used when making the autorization decision. See the AuthorizationEnvironment type for details.
291 @param flags (input) options specified by the AuthorizationFlags enum. set all unused bits to zero to allow for future expansion.
292 @param authorizedRights (output/optional) A pointer to a newly allocated AuthorizationInfoSet in which the authorized subset of rights are returned (authorizedRights should be deallocated by calling AuthorizationFreeItemSet() when it is no longer needed). If NULL the only information returned is the status. Note that if the kAuthorizationFlagPreAuthorize flag was specified rights that could not be preauthorized are returned in authorizedRights, but their flags contains the kAuthorizationFlagCanNotPreAuthorize bit.
293
294 @result errAuthorizationSuccess 0 No error.
295
296 errAuthorizationInvalidRef -60002 The authorization parameter is invalid.
297
298 errAuthorizationInvalidSet -60001 The rights parameter is invalid.
299
300 errAuthorizationInvalidPointer -60004 The authorizedRights parameter is invalid.
301 */
302 OSStatus AuthorizationCopyRights(AuthorizationRef authorization,
303 const AuthorizationRights *rights,
304 const AuthorizationEnvironment * __nullable environment,
305 AuthorizationFlags flags,
306 AuthorizationRights * __nullable * __nullable authorizedRights);
307
308
309 #ifdef __BLOCKS__
310
311 /*!
312 @typedef AuthorizationAsyncCallback
313 Callback block passed to AuthorizationCopyRightsAsync.
314
315 @param err (output) The result of the AuthorizationCopyRights call.
316 @param blockAuthorizedRights (output) The authorizedRights from the AuthorizationCopyRights call to be deallocated by calling AuthorizationFreeItemSet() when it is no longer needed.
317 */
318 typedef void (^AuthorizationAsyncCallback)(OSStatus err, AuthorizationRights * __nullable blockAuthorizedRights);
319
320 /*!
321 @function AuthorizationCopyRightsAsync
322 An asynchronous version of AuthorizationCopyRights.
323
324 @param callbackBlock (input) The callback block to be called upon completion.
325 */
326 void AuthorizationCopyRightsAsync(AuthorizationRef authorization,
327 const AuthorizationRights *rights,
328 const AuthorizationEnvironment * __nullable environment,
329 AuthorizationFlags flags,
330 AuthorizationAsyncCallback callbackBlock);
331
332
333 #endif /* __BLOCKS__ */
334
335
336 /*!
337 @function AuthorizationCopyInfo
338 Returns sideband information (e.g. access credentials) obtained from a call to AuthorizationCreate. The format of this data depends of the tag specified.
339
340 @param authorization (input) The authorization object on which this operation is performed.
341 @param tag (input/optional) An optional string tag specifing which sideband information should be returned. When NULL is specified all available information is returned.
342 @param info (output) A pointer to a newly allocated AuthorizationInfoSet in which the requested sideband infomation is returned (info should be deallocated by calling AuthorizationFreeItemSet() when it is no longer needed).
343
344 @result errAuthorizationSuccess 0 No error.
345
346 errAuthorizationInvalidRef -60002 The authorization parameter is invalid.
347
348 errAuthorizationInvalidTag -60003 The tag parameter is invalid.
349
350 errAuthorizationInvalidPointer -60004 The info parameter is invalid.
351 */
352 OSStatus AuthorizationCopyInfo(AuthorizationRef authorization,
353 AuthorizationString __nullable tag,
354 AuthorizationItemSet * __nullable * __nonnull info);
355
356
357 /*!
358 @function AuthorizationMakeExternalForm
359 Turn an Authorization into an external "byte blob" form so it can be
360 transmitted to another process.
361 Note that *storing* the external form somewhere will probably not do what
362 you want, since authorizations are bounded by sessions, processes, and possibly
363 time limits. This is for online transmission of authorizations.
364
365 @param authorization The (valid) authorization reference to externalize
366 @param extForm Pointer to an AuthorizationExternalForm variable to fill.
367
368 @result errAuthorizationSuccess 0 No error.
369
370 errAuthorizationExternalizeNotAllowed -60009 Externalizing this authorization is not allowed.
371
372 errAuthorizationInvalidRef -60002 The authorization parameter is invalid.
373
374
375 */
376 OSStatus AuthorizationMakeExternalForm(AuthorizationRef authorization,
377 AuthorizationExternalForm * __nonnull extForm);
378
379
380 /*!
381 @function AuthorizationCreateFromExternalForm
382 Internalize the external "byte blob" form of an authorization reference.
383
384 @param extForm Pointer to an AuthorizationExternalForm value.
385 @param authorization Will be filled with a valid AuthorizationRef on success.
386
387 @result errAuthorizationInternalizeNotAllowed -60010 Internalizing this authorization is not allowed.
388 */
389 OSStatus AuthorizationCreateFromExternalForm(const AuthorizationExternalForm *extForm,
390 AuthorizationRef __nullable * __nonnull authorization);
391
392
393 /*!
394 @function AuthorizationFreeItemSet
395 Release the memory allocated for an AuthorizationItemSet that was allocated
396 by an API call.
397
398 @param set The AuthorizationItemSet to deallocate.
399
400 @result errAuthorizationSuccess 0 No error.
401
402 errAuthorizationInvalidSet -60001 The set parameter is invalid.
403 */
404 OSStatus AuthorizationFreeItemSet(AuthorizationItemSet *set);
405
406
407 /*!
408 @function AuthorizationExecuteWithPrivileges
409 Run an executable tool with enhanced privileges after passing
410 suitable authorization procedures.
411
412 @param authorization An authorization reference that is used to authorize
413 access to the enhanced privileges. It is also passed to the tool for
414 further access control.
415 @param pathToTool Full pathname to the tool that should be executed
416 with enhanced privileges.
417 @param options Option bits (reserved). Must be zero.
418 @param arguments An argv-style vector of strings to be passed to the tool.
419 @param communicationsPipe Assigned a UNIX stdio FILE pointer for
420 a bidirectional pipe to communicate with the tool. The tool will have
421 this pipe as its standard I/O channels (stdin/stdout). If NULL, do not
422 establish a communications pipe.
423
424 @discussion This function has been deprecated and should no longer be used.
425 Use a launchd-launched helper tool and/or the Service Mangement framework
426 for this functionality.
427 */
428 OSStatus AuthorizationExecuteWithPrivileges(AuthorizationRef authorization,
429 const char *pathToTool,
430 AuthorizationFlags options,
431 char * __nonnull const * __nonnull arguments,
432 FILE * __nullable * __nullable communicationsPipe) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_7,__IPHONE_NA,__IPHONE_NA);
433
434
435 /*!
436 @function AuthorizationCopyPrivilegedReference
437 From within a tool launched via the AuthorizationExecuteWithPrivileges function
438 ONLY, retrieve the AuthorizationRef originally passed to that function.
439 While AuthorizationExecuteWithPrivileges already verified the authorization to
440 launch your tool, the tool may want to avail itself of any additional pre-authorizations
441 the caller may have obtained through that reference.
442
443 @discussion This function has been deprecated and should no longer be used.
444 Use a launchd-launched helper tool and/or the Service Mangement framework
445 for this functionality.
446 */
447 OSStatus AuthorizationCopyPrivilegedReference(AuthorizationRef __nullable * __nonnull authorization,
448 AuthorizationFlags flags) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_1,__MAC_10_7,__IPHONE_NA,__IPHONE_NA);
449
450 CF_ASSUME_NONNULL_END
451
452 #if defined(__cplusplus)
453 }
454 #endif
455
456 #endif /* !_SECURITY_AUTHORIZATION_H_ */