详解iOS使用Keychain中的kSecClassGenericPassword存储数据

// // MyKeychainh // UUIDdemo // // Created by 555chy on 6/10/ // Copyright © 2016 555chy All rights reserved //  #import <Foundation/Foundationh> #import <Security/Securityh>  @interface MyKeychain : NSObject  + (BOOL)save:(NSString*)service data:(id)data; + (id)load:(NSString*)service; + (void)delete:(NSString*)service;  @end b）MyKeychainm// // MyKeychainm // UUIDdemo // // Created by 555chy on 6/10/ // Copyright © 2016 555chy All rights reserved //  #import "MyKeychainh"  @implementation MyKeychain  + (NSMutableDictionary*) getKeychainQuery: (NSString*)service {   return [NSMutableDictionary dictionaryWithObjectsAndKeys:     (id)kSecClassGenericPassword, (id)kSecClass,     service, (id)kSecAttrService,     service, (id)kSecAttrAccount,     (id)kSecAttrAccessibleAfterFirstUnlock, (id)kSecAttrAccessible,    nil nil]; }  + (BOOL) save:(NSString*)service data:(id)data {   NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];   SecItemDelete((CFDictionaryRef)keychainQuery);   [keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(id)kSecValueData];   return SecItemAdd((CFDictionaryRef)keychainQuery, NULL) == noErr; }  + (id) load:(NSString*)service {   id ret = NULL;   NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];   [keychainQuery setObject:(id)kCFBooleanTrue forKey:(id)kSecReturnData];   [keychainQuery setObject:(id)kSecMatchLimitOne forKey:(id)kSecMatchLimit];   NSData *keyData = NULL;   if(SecItemCopyMatching((CFDictionaryRef)keychainQuery, (CFTypeRef*)(void*)&keyData) == noErr) {     @try {       ret = [NSKeyedUnarchiver unarchiveObjectWithData:keyData];     }     @catch (NSException *exception) {       NSLog(@"Unarchive of %@ failed: %@", service, exception);     }     @finally {     }   }   return ret; }  + (void) delete:(NSString*)service {   NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];   SecItemDelete((CFDictionaryRef)keychainQuery); }  @end 

// // ViewControllerm // UUIDdemo // // Created by 555chy on 6/10/ // Copyright © 2016 555chy All rights reserved //  #import "ViewControllerh" #import "MyKeychainh"  @interface ViewController ()  @end  @implementation ViewController  NSString *KEY_PACKAGE_NAME = @"comchyuuiddemouuid"; NSString *KEY_UUID = @"uuid";  -(void) saveIdfv {   NSString *idfv = [[[UIDevice currentDevice] identifierForVendor] UUIDString];   NSLog(@"get from UIDevice, idfv is %@", idfv);      NSMutableDictionary *dataDict = [NSMutableDictionary dictionary];   [dataDict setObject:idfv forKey:KEY_UUID];   BOOL ret = [MyKeychain save:KEY_PACKAGE_NAME data:dataDict];   NSLog(@"save %@ %@", idfv, ret?@"succ":@"fail"); }  -(void) reloadIdfv {   NSMutableDictionary *loadData = [MyKeychain load:KEY_PACKAGE_NAME];   NSString *loadIdfv = [loadData objectForKey:KEY_UUID];   if(loadIdfv) {     NSLog(@"load idfv is %@", loadIdfv);   } else {     NSLog(@"load idfv, but it not exist");   } }  - (void)viewDidLoad {   [super viewDidLoad];   // Do any additional setup after loading the view, typically from a nib      [self reloadIdfv];      [self saveIdfv];      [self reloadIdfv];    [MyKeychain delete:KEY_PACKAGE_NAME];   NSLog(@"delete idfv from keychain");      [self reloadIdfv];      [self saveIdfv]; }  - (void)didReceiveMemoryWarning {   [super didReceiveMemoryWarning];   // Dispose of any resources that can be recreated }  @end 

/*  * Copyright (c) 2006-2014 Apple Inc All Rights Reserved  *  * @APPLE_LICENSE_HEADER_START@  *  * This file contains Original Code and/or Modifications of Original Code  * as defined in and that are subject to the Apple Public Source License  * Version 0 (the 'License') You may not use this file except in  * compliance with the License Please obtain a copy of the License at  * http://wwwopensourceapplecom/apsl/ and read it before using this  * file  *  * The Original Code and all software distributed under the License are  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT  * Please see the License for the specific language governing rights and  * limitations under the License  *  * @APPLE_LICENSE_HEADER_END@  */  /*!   @header SecItem   SecItem defines CoreFoundation-based constants and functions for   access to Security items (certificates, keys, identities, and   passwords) */  #ifndef _SECURITY_SECITEM_H_ #define _SECURITY_SECITEM_H_  #include <Security/SecBaseh> #include <CoreFoundation/CFArrayh> #include <CoreFoundation/CFDictionaryh>  __BEGIN_DECLS  CF_ASSUME_NONNULL_BEGIN CF_IMPLICIT_BRIDGING_ENABLED  /*!   @enum Class Key Constant   @discussion Predefined key constant used to get or set item class values in     a dictionary Its value is one of the constants defined in the Value     Constants for kSecClass   @constant kSecClass Specifies a dictionary key whose value is the item's     class code You use this key to get or set a value of type CFTypeRef     that contains the item class code */ extern const CFStringRef kSecClass   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0);  /*!   @enum Class Value Constants   @discussion Predefined item class constants used to get or set values in     a dictionary The kSecClass constant is the key and its value is one     of the constants defined here   @constant kSecClassGenericPassword Specifies generic password items   @constant kSecClassInternetPassword Specifies Internet password items   @constant kSecClassCertificate Specifies certificate items   @constant kSecClassKey Specifies key items   @constant kSecClassIdentity Specifies identity items */ extern const CFStringRef kSecClassGenericPassword   __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_2_0); extern const CFStringRef kSecClassInternetPassword   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecClassCertificate   __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_2_0); extern const CFStringRef kSecClassKey   __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_2_0); extern const CFStringRef kSecClassIdentity   __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_2_0);   /*!   @enum Attribute Key Constants   @discussion Predefined item attribute keys used to get or set values in a     dictionary Not all attributes apply to each item class The table     below lists the currently defined attributes for each item class:    kSecClassGenericPassword item attributes:     kSecAttrAccessible     kSecAttrAccessControl     kSecAttrAccessGroup     kSecAttrCreationDate     kSecAttrModificationDate     kSecAttrDescription     kSecAttrComment     kSecAttrCreator     kSecAttrType     kSecAttrLabel     kSecAttrIsInvisible     kSecAttrIsNegative     kSecAttrAccount     kSecAttrService     kSecAttrGeneric     kSecAttrSynchronizable    kSecClassInternetPassword item attributes:     kSecAttrAccessible     kSecAttrAccessControl     kSecAttrAccessGroup     kSecAttrCreationDate     kSecAttrModificationDate     kSecAttrDescription     kSecAttrComment     kSecAttrCreator     kSecAttrType     kSecAttrLabel     kSecAttrIsInvisible     kSecAttrIsNegative     kSecAttrAccount     kSecAttrSecurityDomain     kSecAttrServer     kSecAttrProtocol     kSecAttrAuthenticationType     kSecAttrPort     kSecAttrPath     kSecAttrSynchronizable    kSecClassCertificate item attributes:     kSecAttrAccessible     kSecAttrAccessControl     kSecAttrAccessGroup     kSecAttrCertificateType     kSecAttrCertificateEncoding     kSecAttrLabel     kSecAttrSubject     kSecAttrIssuer     kSecAttrSerialNumber     kSecAttrSubjectKeyID     kSecAttrPublicKeyHash     kSecAttrSynchronizable    kSecClassKey item attributes:     kSecAttrAccessible     kSecAttrAccessControl     kSecAttrAccessGroup     kSecAttrKeyClass     kSecAttrLabel     kSecAttrApplicationLabel     kSecAttrIsPermanent     kSecAttrApplicationTag     kSecAttrKeyType     kSecAttrKeySizeInBits     kSecAttrEffectiveKeySize     kSecAttrCanEncrypt     kSecAttrCanDecrypt     kSecAttrCanDerive     kSecAttrCanSign     kSecAttrCanVerify     kSecAttrCanWrap     kSecAttrCanUnwrap     kSecAttrSynchronizable    kSecClassIdentity item attributes:     Since an identity is the combination of a private key and a     certificate, this class shares attributes of both kSecClassKey and     kSecClassCertificate     @constant kSecAttrAccessible Specifies a dictionary key whose value    indicates when your application needs access to an item's data You    should choose the most restrictive option that meets your application's    needs to allow the system to protect that item in the best way possible    See the "kSecAttrAccessible Value Constants" section for a list of    values which can be specified    IMPORTANT: This attribute is currently not supported for OS X keychain    items, unless the kSecAttrSynchronizable attribute is also present If    both attributes are specified on either OS X or iOS, the value for the    kSecAttrAccessible key may only be one whose name does not end with    "ThisDeviceOnly", as those cannot sync to another device     @constant kSecAttrAccessControl Specifies a dictionary key whose value    is SecAccessControl instance which contains access control conditions    for item     @constant kSecAttrAccessGroup Specifies a dictionary key whose value is    a CFStringRef indicating which access group a item is in The access    groups that a particular application has membership in are determined by    two entitlements for that application The application-identifier    entitlement contains the application's single access group, unless    there is a keychain-access-groups entitlement present The latter    has as its value a list of access groups; the first item in this list    is the default access group Unless a specific access group is provided    as the value of kSecAttrAccessGroup when SecItemAdd is called, new items    are created in the application's default access group Specifying this    attribute in SecItemCopyMatching, SecItemUpdate, or SecItemDelete calls    limits the search to the specified access group (of which the calling    application must be a member to obtain matching results) To share    keychain items between multiple applications, each application must have    a common group listed in its keychain-access-groups entitlement, and each    must specify this shared access group name as the value for the    kSecAttrAccessGroup key in the dictionary passed to SecItem functions     @constant kSecAttrSynchronizable Specifies a dictionary key whose value is    a CFBooleanRef indicating whether the item in question can be synchronized    To add a new item which can be synced to other devices, or to obtain    synchronizable results from a query, supply this key with a value of    kCFBooleanTrue If the key is not supplied, or has a value of    kCFBooleanFalse, then no synchronizable items will be added or returned    A predefined value, kSecAttrSynchronizableAny, may be provided instead of    kCFBooleanTrue if both synchronizable and non-synchronizable results are    desired     IMPORTANT: Specifying the kSecAttrSynchronizable key has several caveats:       - Updating or deleting items using the kSecAttrSynchronizable key will       affect all copies of the item, not just the one on your local device       Be sure that it makes sense to use the same password on all devices       before deciding to make a password synchronizable      - Only password items can currently be synchronized Keychain syncing       is not supported for certificates or cryptographic keys      - Items stored or obtained using the kSecAttrSynchronizable key cannot       specify SecAccessRef-based access control with kSecAttrAccess If a       password is intended to be shared between multiple applications, the       kSecAttrAccessGroup key must be specified, and each application       using this password must have a 'keychain-access-groups' entitlement       with the specified access group value      - Items stored or obtained using the kSecAttrSynchronizable key may       not also specify a kSecAttrAccessible value which is incompatible       with syncing (namely, those whose names end with "ThisDeviceOnly")      - Items stored or obtained using the kSecAttrSynchronizable key cannot       be specified by reference You must pass kSecReturnAttributes and/or       kSecReturnData to retrieve results; kSecReturnRef is currently not       supported for synchronizable items      - Persistent references to synchronizable items should be avoided;       while they may work locally, they cannot be moved between devices,       and may not resolve if the item is modified on some other device      - When specifying a query that uses the kSecAttrSynchronizable key,       search keys are limited to the item's class and attributes       The only search constant which may be used is kSecMatchLimit; other       constants using the kSecMatch prefix are not supported at this time    @constant kSecAttrCreationDate (read-only) Specifies a dictionary key whose     value is the item's creation date You use this key to get a value     of type CFDateRef that represents the date the item was created   @constant kSecAttrModificationDate (read-only) Specifies a dictionary key     whose value is the item's modification date You use this key to get     a value of type CFDateRef that represents the last time the item was     updated   @constant kSecAttrDescription Specifies a dictionary key whose value is     the item's description attribute You use this key to set or get a     value of type CFStringRef that represents a user-visible string     describing this particular kind of item (eg, "disk image password")   @constant kSecAttrComment Specifies a dictionary key whose value is the     item's comment attribute You use this key to set or get a value of     type CFStringRef containing the user-editable comment for this item   @constant kSecAttrCreator Specifies a dictionary key whose value is the     item's creator attribute You use this key to set or get a value of     type CFNumberRef that represents the item's creator This number is     the unsigned integer representation of a four-character code (eg,     'aCrt')   @constant kSecAttrType Specifies a dictionary key whose value is the item's     type attribute You use this key to set or get a value of type     CFNumberRef that represents the item's type This number is the     unsigned integer representation of a four-character code (eg,     'aTyp')   @constant kSecAttrLabel Specifies a dictionary key whose value is the     item's label attribute You use this key to set or get a value of     type CFStringRef containing the user-visible label for this item   @constant kSecAttrIsInvisible Specifies a dictionary key whose value is the     item's invisible attribute You use this key to set or get a value     of type CFBooleanRef that indicates whether the item is invisible     (ie, should not be displayed)   @constant kSecAttrIsNegative Specifies a dictionary key whose value is the     item's negative attribute You use this key to set or get a value of     type CFBooleanRef that indicates whether there is a valid password     associated with this keychain item This is useful if your application     doesn't want a password for some particular service to be stored in     the keychain, but prefers that it always be entered by the user   @constant kSecAttrAccount Specifies a dictionary key whose value is the     item's account attribute You use this key to set or get a CFStringRef     that contains an account name (Items of class     kSecClassGenericPassword, kSecClassInternetPassword have this     attribute)   @constant kSecAttrService Specifies a dictionary key whose value is the     item's service attribute You use this key to set or get a CFStringRef     that represents the service associated with this item (Items of class     kSecClassGenericPassword have this attribute)   @constant kSecAttrGeneric Specifies a dictionary key whose value is the     item's generic attribute You use this key to set or get a value of     CFDataRef that contains a user-defined attribute (Items of class     kSecClassGenericPassword have this attribute)   @constant kSecAttrSecurityDomain Specifies a dictionary key whose value     is the item's security domain attribute You use this key to set or     get a CFStringRef value that represents the Internet security domain     (Items of class kSecClassInternetPassword have this attribute)   @constant kSecAttrServer Specifies a dictionary key whose value is the     item's server attribute You use this key to set or get a value of     type CFStringRef that contains the server's domain name or IP address     (Items of class kSecClassInternetPassword have this attribute)   @constant kSecAttrProtocol Specifies a dictionary key whose value is the     item's protocol attribute You use this key to set or get a value of     type CFNumberRef that denotes the protocol for this item (see the     SecProtocolType enum in SecKeychainItemh) (Items of class     kSecClassInternetPassword have this attribute)   @constant kSecAttrAuthenticationType Specifies a dictionary key whose value     is the item's authentication type attribute You use this key to set     or get a value of type CFNumberRef that denotes the authentication     scheme for this item (see the kSecAttrAuthenticationType value     constants below)   @constant kSecAttrPort Specifies a dictionary key whose value is the item's     port attribute You use this key to set or get a CFNumberRef value     that represents an Internet port number (Items of class     kSecClassInternetPassword have this attribute)   @constant kSecAttrPath Specifies a dictionary key whose value is the item's     path attribute, typically this is the path component of the URL You use     this key to set or get a CFStringRef value that represents a path (Items     of class kSecClassInternetPassword have this attribute)   @constant kSecAttrSubject (read-only) Specifies a dictionary key whose     value is the item's subject You use this key to get a value of type     CFDataRef that contains the X500 subject name of a certificate     (Items of class kSecClassCertificate have this attribute)   @constant kSecAttrIssuer (read-only) Specifies a dictionary key whose value     is the item's issuer You use this key to get a value of type     CFDataRef that contains the X500 issuer name of a certificate (Items     of class kSecClassCertificate have this attribute)   @constant kSecAttrSerialNumber (read-only) Specifies a dictionary key whose     value is the item's serial number You use this key to get a value     of type CFDataRef that contains the serial number data of a     certificate (Items of class kSecClassCertificate have this     attribute)   @constant kSecAttrSubjectKeyID (read-only) Specifies a dictionary key whose     value is the item's subject key ID You use this key to get a value     of type CFDataRef that contains the subject key ID of a certificate     (Items of class kSecClassCertificate have this attribute)   @constant kSecAttrPublicKeyHash (read-only) Specifies a dictionary key     whose value is the item's public key hash You use this key to get a     value of type CFDataRef that contains the hash of a certificate's     public key (Items of class kSecClassCertificate have this attribute)   @constant kSecAttrCertificateType (read-only) Specifies a dictionary key     whose value is the item's certificate type You use this key to get     a value of type CFNumberRef that denotes the certificate type     (Currently only the value of this attribute must be equal to the     version of the X509 certificate So 1 for v1 2 for v2 and 3 for v3     certificates) Only items of class kSecClassCertificate have this     attribute   @constant kSecAttrCertificateEncoding (read-only) Specifies a dictionary     key whose value is the item's certificate encoding You use this key     to get a value of type CFNumberRef that denotes the certificate     encoding (Currently only the value 3 meaning     kSecAttrCertificateEncodingDER is supported) Only items of class     kSecClassCertificate have this attribute   @constant kSecAttrKeyClass (read only) Specifies a dictionary key whose     value is one of kSecAttrKeyClassPublic, kSecAttrKeyClassPrivate or     kSecAttrKeyClassSymmetric   @constant kSecAttrApplicationLabel Specifies a dictionary key whose value     is the key's application label attribute This is different from the     kSecAttrLabel (which is intended to be human-readable) This attribute     is used to look up a key programmatically; in particular, for keys of     class kSecAttrKeyClassPublic and kSecAttrKeyClassPrivate, the value of     this attribute is the hash of the public key   @constant kSecAttrIsPermanent Specifies a dictionary key whose value is a     CFBooleanRef indicating whether the key in question will be stored     permanently   @constant kSecAttrApplicationTag Specifies a dictionary key whose value is a     CFDataRef containing private tag data   @constant kSecAttrKeyType Specifies a dictionary key whose value is a     CFNumberRef indicating the algorithm associated with this key     (Currently only the value 42 is supported, alternatively you can use     kSecAttrKeyTypeRSA)   @constant kSecAttrKeySizeInBits Specifies a dictionary key whose value     is a CFNumberRef indicating the number of bits in this key   @constant kSecAttrEffectiveKeySize Specifies a dictionary key whose value     is a CFNumberRef indicating the effective number of bits in this key     For example, a DES key has a kSecAttrKeySizeInBits of 64, but a     kSecAttrEffectiveKeySize of 56 bits   @constant kSecAttrCanEncrypt Specifies a dictionary key whole value is a     CFBooleanRef indicating whether the key in question can be used to     encrypt data   @constant kSecAttrCanDecrypt Specifies a dictionary key whose value is a     CFBooleanRef indicating whether the key in question can be used to     decrypt data   @constant kSecAttrCanDerive Specifies a dictionary key whole value is a     CFBooleanRef indicating whether the key in question can be used to     derive another key   @constant kSecAttrCanSign Specifies a dictionary key whole value is a     CFBooleanRef indicating whether the key in question can be used to     create a digital signature   @constant kSecAttrCanVerify Specifies a dictionary key whole value is a     CFBooleanRef indicating whether the key in question can be used to     verify a digital signature   @constant kSecAttrCanWrap Specifies a dictionary key whole value is a     CFBooleanRef indicating whether the key in question can be used to     wrap another key   @constant kSecAttrCanUnwrap Specifies a dictionary key whole value is a     CFBooleanRef indicating whether the key in question can be used to     unwrap another key   @constant kSecAttrSyncViewHint Specifies a dictionary key whose value is   a CFStringRef This value is part of the primary key of each item, and   can be used to help distiguish Sync Views when defining their   queries   @constant kSecAttrTokenID Specifies a dictionary key whose presence   indicates that item is backed by external token Value of this attribute   is CFStringRef uniquely identifying containing token When this attribute   is not present, item is stored in internal keychain database   Note that once item is created, this attribute cannot be changed - in other   words it is not possible to migrate existing items to, from or between tokens   Currently the only available value for this attribute is   kSecAttrTokenIDSecureEnclave, which indicates that item (private key) is   backed by device's Secure Enclave  */ extern const CFStringRef kSecAttrAccessible   __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_4_0); extern const CFStringRef kSecAttrAccessControl   __OSX_AVAILABLE_STARTING(__MAC_10_10, __IPHONE_8_0); extern const CFStringRef kSecAttrAccessGroup   __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_3_0); extern const CFStringRef kSecAttrSynchronizable   __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_7_0); extern const CFStringRef kSecAttrCreationDate   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrModificationDate   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrDescription   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrComment   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrCreator   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrType   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrLabel   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrIsInvisible   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrIsNegative   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrAccount   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrService   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrGeneric   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrSecurityDomain   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrServer   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocol   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrAuthenticationType   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrPort   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrPath   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrSubject   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrIssuer   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrSerialNumber   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrSubjectKeyID   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrPublicKeyHash   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrCertificateType   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrCertificateEncoding   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrKeyClass   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrApplicationLabel   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrIsPermanent   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrApplicationTag   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrKeyType   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrKeySizeInBits   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrEffectiveKeySize   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrCanEncrypt   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrCanDecrypt   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrCanDerive   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrCanSign   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrCanVerify   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrCanWrap   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrCanUnwrap   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrSyncViewHint   __OSX_AVAILABLE_STARTING(__MAC_10_11, __IPHONE_9_0); extern const CFStringRef kSecAttrTokenID   __OSX_AVAILABLE_STARTING(__MAC_10_11, __IPHONE_9_0);  /*!   @enum kSecAttrAccessible Value Constants   @discussion Predefined item attribute constants used to get or set values     in a dictionary The kSecAttrAccessible constant is the key and its     value is one of the constants defined here     When asking SecItemCopyMatching to return the item's data, the error     errSecInteractionNotAllowed will be returned if the item's data is not     available until a device unlock occurs   @constant kSecAttrAccessibleWhenUnlocked Item data can only be accessed     while the device is unlocked This is recommended for items that only     need be accesible while the application is in the foreground Items     with this attribute will migrate to a new device when using encrypted     backups   @constant kSecAttrAccessibleAfterFirstUnlock Item data can only be     accessed once the device has been unlocked after a restart This is     recommended for items that need to be accesible by background     applications Items with this attribute will migrate to a new device     when using encrypted backups   @constant kSecAttrAccessibleAlways Item data can always be accessed     regardless of the lock state of the device This is not recommended     for anything except system use Items with this attribute will migrate     to a new device when using encrypted backups   @constant kSecAttrAccessibleWhenPasscodeSetThisDeviceOnly Item data can      only be accessed while the device is unlocked This class is only      available if a passcode is set on the device This is recommended for      items that only need to be accessible while the application is in the      foreground Items with this attribute will never migrate to a new      device, so after a backup is restored to a new device, these items      will be missing No items can be stored in this class on devices      without a passcode Disabling the device passcode will cause all      items in this class to be deleted   @constant kSecAttrAccessibleWhenUnlockedThisDeviceOnly Item data can only     be accessed while the device is unlocked This is recommended for items     that only need be accesible while the application is in the foreground     Items with this attribute will never migrate to a new device, so after     a backup is restored to a new device, these items will be missing   @constant kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly Item data can     only be accessed once the device has been unlocked after a restart     This is recommended for items that need to be accessible by background     applications Items with this attribute will never migrate to a new     device, so after a backup is restored to a new device these items will     be missing   @constant kSecAttrAccessibleAlwaysThisDeviceOnly Item data can always     be accessed regardless of the lock state of the device This option     is not recommended for anything except system use Items with this     attribute will never migrate to a new device, so after a backup is     restored to a new device, these items will be missing */ extern const CFStringRef kSecAttrAccessibleWhenUnlocked   __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_4_0); extern const CFStringRef kSecAttrAccessibleAfterFirstUnlock   __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_4_0); extern const CFStringRef kSecAttrAccessibleAlways   __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_4_0); extern const CFStringRef kSecAttrAccessibleWhenPasscodeSetThisDeviceOnly   __OSX_AVAILABLE_STARTING(__MAC_10_10, __IPHONE_8_0); extern const CFStringRef kSecAttrAccessibleWhenUnlockedThisDeviceOnly   __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_4_0); extern const CFStringRef kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly   __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_4_0); extern const CFStringRef kSecAttrAccessibleAlwaysThisDeviceOnly   __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_4_0);  /*!   @enum kSecAttrProtocol Value Constants   @discussion Predefined item attribute constants used to get or set values     in a dictionary The kSecAttrProtocol constant is the key and its     value is one of the constants defined here   @constant kSecAttrProtocolFTP   @constant kSecAttrProtocolFTPAccount   @constant kSecAttrProtocolHTTP   @constant kSecAttrProtocolIRC   @constant kSecAttrProtocolNNTP   @constant kSecAttrProtocolPOP   @constant kSecAttrProtocolSMTP   @constant kSecAttrProtocolSOCKS   @constant kSecAttrProtocolIMAP   @constant kSecAttrProtocolLDAP   @constant kSecAttrProtocolAppleTalk   @constant kSecAttrProtocolAFP   @constant kSecAttrProtocolTelnet   @constant kSecAttrProtocolSSH   @constant kSecAttrProtocolFTPS   @constant kSecAttrProtocolHTTPS   @constant kSecAttrProtocolHTTPProxy   @constant kSecAttrProtocolHTTPSProxy   @constant kSecAttrProtocolFTPProxy   @constant kSecAttrProtocolSMB   @constant kSecAttrProtocolRTSP   @constant kSecAttrProtocolRTSPProxy   @constant kSecAttrProtocolDAAP   @constant kSecAttrProtocolEPPC   @constant kSecAttrProtocolIPP   @constant kSecAttrProtocolNNTPS   @constant kSecAttrProtocolLDAPS   @constant kSecAttrProtocolTelnetS   @constant kSecAttrProtocolIMAPS   @constant kSecAttrProtocolIRCS   @constant kSecAttrProtocolPOP3S */ extern const CFStringRef kSecAttrProtocolFTP   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolFTPAccount   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolHTTP   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolIRC   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolNNTP   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolPOP3   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolSMTP   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolSOCKS   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolIMAP   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolLDAP   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolAppleTalk   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolAFP   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolTelnet   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolSSH   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolFTPS   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolHTTPS   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolHTTPProxy   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolHTTPSProxy   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolFTPProxy   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolSMB   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolRTSP   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolRTSPProxy   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolDAAP   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolEPPC   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolIPP   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolNNTPS   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolLDAPS   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolTelnetS   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolIMAPS   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolIRCS   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrProtocolPOP3S   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0);  /*!   @enum kSecAttrAuthenticationType Value Constants   @discussion Predefined item attribute constants used to get or set values     in a dictionary The kSecAttrAuthenticationType constant is the key     and its value is one of the constants defined here   @constant kSecAttrAuthenticationTypeNTLM   @constant kSecAttrAuthenticationTypeMSN   @constant kSecAttrAuthenticationTypeDPA   @constant kSecAttrAuthenticationTypeRPA   @constant kSecAttrAuthenticationTypeHTTPBasic   @constant kSecAttrAuthenticationTypeHTTPDigest   @constant kSecAttrAuthenticationTypeHTMLForm   @constant kSecAttrAuthenticationTypeDefault */ extern const CFStringRef kSecAttrAuthenticationTypeNTLM   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrAuthenticationTypeMSN   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrAuthenticationTypeDPA   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrAuthenticationTypeRPA   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrAuthenticationTypeHTTPBasic   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrAuthenticationTypeHTTPDigest   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrAuthenticationTypeHTMLForm   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecAttrAuthenticationTypeDefault   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0);  /*!   @enum kSecAttrKeyClass Value Constants   @discussion Predefined item attribute constants used to get or set values     in a dictionary The kSecAttrKeyClass constant is the key     and its value is one of the constants defined here   @constant kSecAttrKeyClassPublic   @constant kSecAttrKeyClassPrivate   @constant kSecAttrKeyClassSymmetric */ extern const CFStringRef kSecAttrKeyClassPublic   __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_2_0); extern const CFStringRef kSecAttrKeyClassPrivate   __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_2_0); extern const CFStringRef kSecAttrKeyClassSymmetric   __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_2_0);  /*!   @enum kSecAttrKeyType Value Constants   @discussion Predefined item attribute constants used to get or set values     in a dictionary The kSecAttrKeyType constant is the key     and its value is one of the constants defined here   @constant kSecAttrKeyTypeRSA   @constant kSecAttrKeyTypeEC */ extern const CFStringRef kSecAttrKeyTypeRSA   __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_2_0); extern const CFStringRef kSecAttrKeyTypeEC   __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_4_0);  /*!   @enum kSecAttrSynchronizable Value Constants   @discussion Predefined item attribute constants used to get or set values     in a dictionary The kSecAttrSynchronizable constant is the key     and its value is one of the constants defined here   @constant kSecAttrSynchronizableAny Specifies that both synchronizable and     non-synchronizable results should be returned from this query This may     be used as a value for the kSecAttrSynchronizable dictionary key in a     call to SecItemCopyMatching, SecItemUpdate, or SecItemDelete */ extern const CFStringRef kSecAttrSynchronizableAny   __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_7_0);  /*!   @enum Search Constants   @discussion Predefined search constants used to set values in a query     dictionary You can specify a combination of search attributes and     item attributes when looking for matching items with the     SecItemCopyMatching function   @constant kSecMatchPolicy Specifies a dictionary key whose value is a     SecPolicyRef If provided, returned certificates or identities must     verify with this policy   @constant kSecMatchIssuers Specifies a dictionary key whose value is a     CFArray of X500 names (of type CFDataRef) If provided, returned     certificates or identities will be limited to those whose     certificate chain contains one of the issuers provided in this list   @constant kSecMatchEmailAddressIfPresent Specifies a dictionary key whose     value is a CFStringRef containing an RFC822 email address If     provided, returned certificates or identities will be limited to those     that contain the address, or do not contain any email address   @constant kSecMatchSubjectContains Specifies a dictionary key whose value     is a CFStringRef If provided, returned certificates or identities     will be limited to those containing this string in the subject   @constant kSecMatchCaseInsensitive Specifies a dictionary key whose value     is a CFBooleanRef If this value is kCFBooleanFalse, or is not     provided, then case-sensitive string matching is performed   @constant kSecMatchTrustedOnly Specifies a dictionary key whose value is     a CFBooleanRef If provided with a value of kCFBooleanTrue, only     certificates which can be verified back to a trusted anchor will be     returned If this value is kCFBooleanFalse, or is not provided, then     both trusted and untrusted certificates may be returned   @constant kSecMatchValidOnDate Specifies a dictionary key whose value is     of type CFDateRef If provided, returned keys, certificates or     identities will be limited to those which are valid for the given date     Pass a value of kCFNull to indicate the current date   @constant kSecMatchLimit Specifies a dictionary key whose value is a     CFNumberRef If provided, this value specifies the maximum number of     results to return If not provided, results are limited to the first     item found Predefined values are provided for a single item     (kSecMatchLimitOne) and all matching items (kSecMatchLimitAll)   @constant kSecMatchLimitOne Specifies that results are limited to the first     item found; used as a value for the kSecMatchLimit dictionary key   @constant kSecMatchLimitAll Specifies that an unlimited number of results     may be returned; used as a value for the kSecMatchLimit dictionary     key */ extern const CFStringRef kSecMatchPolicy   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecMatchItemList   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecMatchSearchList   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecMatchIssuers   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecMatchEmailAddressIfPresent   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecMatchSubjectContains   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecMatchCaseInsensitive   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecMatchTrustedOnly   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecMatchValidOnDate   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecMatchLimit   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecMatchLimitOne   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecMatchLimitAll   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0);   /*!   @enum Return Type Key Constants   @discussion Predefined return type keys used to set values in a dictionary     You use these keys to specify the type of results which should be     returned by the SecItemCopyMatching or SecItemAdd function You can     specify zero or more of these return types If more than one of these     result types is specified, the result is returned as a CFDictionaryRef     whose keys are the result types and values are the requested data   @constant kSecReturnData Specifies a dictionary key whose value is of type     CFBooleanRef A value of kCFBooleanTrue indicates that the data of     an item (CFDataRef) should be returned For keys and password     items, data is secret (encrypted) and may require the user to enter     a password for access   @constant kSecReturnAttributes Specifies a dictionary key whose value is     of type CFBooleanRef A value of kCFBooleanTrue indicates that the     (non-encrypted) attributes of an item (CFDictionaryRef) should be     returned   @constant kSecReturnRef Specifies a dictionary key whose value is a     CFBooleanRef A value of kCFBooleanTrue indicates that a reference     should be returned Depending on the item class requested, the     returned reference(s) may be of type SecKeychainItemRef, SecKeyRef,     SecCertificateRef, or SecIdentityRef   @constant kSecReturnPersistentRef Specifies a dictionary key whose value     is of type CFBooleanRef A value of kCFBooleanTrue indicates that a     persistent reference to an item (CFDataRef) should be returned */ extern const CFStringRef kSecReturnData   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecReturnAttributes   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecReturnRef   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecReturnPersistentRef   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0);   /*!   @enum Value Type Key Constants   @discussion Predefined value type keys used to pass values in a dictionary     You can specify zero or more of these types depending on the function     you are calling For SecItemCopyMatching or SecItemAdd these are     used as keys in the results dictionary   @constant kSecValueData Specifies a dictionary key whose value is of type     CFDataRef For keys and password items, data is secret (encrypted)     and may require the user to enter a password for access   @constant kSecValueRef Specifies a dictionary key whose value, depending     on the item class requested, is of type SecKeychainItemRef, SecKeyRef,     SecCertificateRef, or SecIdentityRef   @constant kSecValuePersistentRef Specifies a dictionary key whose value     is of type CFDataRef The bytes in this CFDataRef can be stored by     the caller and used on a subsequent invocation of the application (or     even a different application) to retrieve the item referenced by it */ extern const CFStringRef kSecValueData   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecValueRef   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecValuePersistentRef   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0);   /*!   @enum Other Constants   @discussion Predefined constants used to set values in a dictionary   @constant kSecUseItemList Specifies a dictionary key whose value is a     CFArray of items If provided, this array is treated as the set of     all possible items to search, or add if the API being called is     SecItemAdd The items in this array may be of type SecKeyRef,     SecCertificateRef, SecIdentityRef, or CFDataRef (for a persistent     item reference) The items in the array must all be of the same     type When this attribute is provided, no keychains are searched   @constant kSecUseOperationPrompt Specifies a dictionary key whose value     is a CFStringRef that represents a user-visible string describing     the operation for which the application is attempting to authenticate     The application is responsible for the text localization   @constant kSecUseNoAuthenticationUI Specifies a dictionary key whose value     is a CFBooleanRef If provided with a value of kCFBooleanTrue, the error     errSecInteractionNotAllowed will be returned if the item is attempting     to authenticate with UI   @constant kSecUseAuthenticationUI Specifies a dictionary key whose value     is one of kSecUseAuthenticationUIAllow, kSecUseAuthenticationUIFail, kSecUseAuthenticationUISkip   @constant kSecUseAuthenticationContext Specifies a dictionary key whose value     is LAContext to be used for keychain item authentication     * If the item requires authentication and this key is omitted, a new context      will be created just for the purpose of the single call     * If the specified context has been previously authenticated, the operation      will succeed without asking user for authentication     * If the specified context has not been previously authenticated, the new      authentication will be started on this context, allowing caller to      eventually reuse the sucessfully authenticated context in subsequent      keychain operations */ extern const CFStringRef kSecUseItemList   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0); extern const CFStringRef kSecUseOperationPrompt   __OSX_AVAILABLE_STARTING(__MAC_10_10, __IPHONE_8_0); extern const CFStringRef kSecUseNoAuthenticationUI   __OSX_AVAILABLE_BUT_DEPRECATED_MSG(__MAC_10_10, __MAC_10_11, __IPHONE_8_0, __IPHONE_9_0, "Use a kSecAuthenticationUI instead"); extern const CFStringRef kSecUseAuthenticationUI   __OSX_AVAILABLE_STARTING(__MAC_10_11, __IPHONE_9_0); extern const CFStringRef kSecUseAuthenticationContext   __OSX_AVAILABLE_STARTING(__MAC_10_11, __IPHONE_9_0);  /*!   @enum kSecUseAuthenticationUI Value Constants   @discussion Predefined item attribute constants used to get or set values     in a dictionary The kSecUseAuthenticationUI constant is the key and its     value is one of the constants defined here     If the key kSecUseAuthenticationUI not provided then kSecUseAuthenticationUIAllow     is used as default   @constant kSecUseAuthenticationUIAllow Specifies that authenticate UI can appear   @constant kSecUseAuthenticationUIFail Specifies that the error     errSecInteractionNotAllowed will be returned if an item needs     to authenticate with UI   @constant kSecUseAuthenticationUIAllowSkip Specifies that all items which need     to authenticate with UI will be silently skipped This value can be used     only with SecItemCopyMatching  */ extern const CFStringRef kSecUseAuthenticationUIAllow   __OSX_AVAILABLE_STARTING(__MAC_10_11, __IPHONE_9_0); extern const CFStringRef kSecUseAuthenticationUIFail   __OSX_AVAILABLE_STARTING(__MAC_10_11, __IPHONE_9_0); extern const CFStringRef kSecUseAuthenticationUISkip   __OSX_AVAILABLE_STARTING(__MAC_10_11, __IPHONE_9_0);  /*!    @enum kSecAttrTokenID Value Constants    @discussion Predefined item attribute constant used to get or set values      in a dictionary The kSecAttrTokenID constant is the key and its value      can be kSecAttrTokenIDSecureEnclave    @constant kSecAttrTokenIDSecureEnclave Specifies well-known identifier of the      token implemented using device's Secure Enclave The only keychain items      supported by the Secure Enclave token are 256-bit elliptic curve keys      (kSecAttrKeyTypeEC) Keys must be generated on the secure enclave using      SecKeyGenerateKeyPair call with kSecAttrTokenID set to      kSecAttrTokenIDSecureEnclave in the parameters dictionary, it is not      possible to import pregenerated keys to kSecAttrTokenIDSecureEnclave token */ extern const CFStringRef kSecAttrTokenIDSecureEnclave   __OSX_AVAILABLE_STARTING(__MAC_NA, __IPHONE_9_0);  /*!   @function SecItemCopyMatching   @abstract Returns one or more items which match a search query   @param query A dictionary containing an item class specification and     optional attributes for controlling the search See the "Keychain     Search Attributes" section for a description of currently defined     search attributes   @param result On return, a CFTypeRef reference to the found item(s) The     exact type of the result is based on the search attributes supplied     in the query, as discussed below   @result A result code See "Security Error Codes" (SecBaseh)   @discussion Attributes defining a search are specified by adding key/value     pairs to the query dictionary    A typical query consists of:     * a kSecClass key, whose value is a constant from the Class     Constants section that specifies the class of item(s) to be searched    * one or more keys from the "Attribute Key Constants" section, whose value     is the attribute data to be matched    * one or more keys from the "Search Constants" section, whose value is     used to further refine the search    * a key from the "Return Type Key Constants" section, specifying the type of     results desired    Result types are specified as follows:     * To obtain the data of a matching item (CFDataRef), specify     kSecReturnData with a value of kCFBooleanTrue    * To obtain the attributes of a matching item (CFDictionaryRef), specify     kSecReturnAttributes with a value of kCFBooleanTrue    * To obtain a reference to a matching item (SecKeychainItemRef,     SecKeyRef, SecCertificateRef, or SecIdentityRef), specify kSecReturnRef     with a value of kCFBooleanTrue    * To obtain a persistent reference to a matching item (CFDataRef),     specify kSecReturnPersistentRef with a value of kCFBooleanTrue Note     that unlike normal references, a persistent reference may be stored     on disk or passed between processes    * If more than one of these result types is specified, the result is     returned as a CFDictionaryRef containing all the requested data    * If a result type is not specified, no results are returned    By default, this function returns only the first match found To obtain   more than one matching item at a time, specify kSecMatchLimit with a value   greater than The result will be a CFArrayRef containing up to that   number of matching items; the items' types are described above    To filter a provided list of items down to those matching the query,   specify a kSecMatchItemList whose value is a CFArray of SecKeychainItemRef,   SecKeyRef, SecCertificateRef, or SecIdentityRef items The objects in the   provided array must be of the same type    To convert from a persistent item reference to a normal item reference,   specify a kSecValuePersistentRef whose value a CFDataRef (the persistent   reference), and a kSecReturnRef whose value is kCFBooleanTrue */ OSStatus SecItemCopyMatching(CFDictionaryRef query, CFTypeRef * __nullable CF_RETURNS_RETAINED result)   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0);  /*!   @function SecItemAdd   @abstract Add one or more items to a keychain   @param attributes A dictionary containing an item class specification and     optional entries specifying the item's attribute values See the     "Attribute Key Constants" section for a description of currently defined     attributes   @param result On return, a CFTypeRef reference to the newly added item(s)     The exact type of the result is based on the values supplied     in attributes, as discussed below Pass NULL if this result is not     required   @result A result code See "Security Error Codes" (SecBaseh)   @discussion Attributes defining an item are specified by adding key/value     pairs to the attributes dictionary To add multiple items to a keychain     at once use the kSecUseItemList key with an array of items as its value     This is currently only supported for non password items    Result types are specified as follows:     * To obtain the data of the added item (CFDataRef), specify     kSecReturnData with a value of kCFBooleanTrue    * To obtain all the attributes of the added item (CFDictionaryRef),     specify kSecReturnAttributes with a value of kCFBooleanTrue    * To obtain a reference to the added item (SecKeychainItemRef, SecKeyRef,     SecCertificateRef, or SecIdentityRef), specify kSecReturnRef with a     value of kCFBooleanTrue    * To obtain a persistent reference to the added item (CFDataRef), specify     kSecReturnPersistentRef with a value of kCFBooleanTrue Note that     unlike normal references, a persistent reference may be stored on disk     or passed between processes    * If more than one of these result types is specified, the result is     returned as a CFDictionaryRef containing all the requested data    * If a result type is not specified, no results are returned */ OSStatus SecItemAdd(CFDictionaryRef attributes, CFTypeRef * __nullable CF_RETURNS_RETAINED result)   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0);  /*!   @function SecItemUpdate   @abstract Modify zero or more items which match a search query   @param query A dictionary containing an item class specification and     optional attributes for controlling the search See the "Attribute     Constants" and "Search Constants" sections for a description of     currently defined search attributes   @param attributesToUpdate A dictionary containing one or more attributes     whose values should be set to the ones specified Only real keychain     attributes are permitted in this dictionary (no "meta" attributes are     allowed) See the "Attribute Key Constants" section for a description of     currently defined value attributes   @result A result code See "Security Error Codes" (SecBaseh)   @discussion Attributes defining a search are specified by adding key/value     pairs to the query dictionary */ OSStatus SecItemUpdate(CFDictionaryRef query,   CFDictionaryRef attributesToUpdate)   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0);  /*!   @function SecItemDelete   @abstract Delete zero or more items which match a search query   @param query A dictionary containing an item class specification and     optional attributes for controlling the search See the "Attribute     Constants" and "Search Constants" sections for a description of     currently defined search attributes   @result A result code See "Security Error Codes" (SecBaseh)   @discussion Attributes defining a search are specified by adding key/value     pairs to the query dictionary    By default, this function deletes all items matching the specified query   You can change this behavior by specifying one of the follow keys:     * To delete an item identified by a transient reference, specify     kSecValueRef with a reference returned by using the kSecReturnRef     key in a previous call to SecItemCopyMatching or SecItemAdd    * To delete an item identified by a persistent reference, specify     kSecValuePersistentRef with a persistent reference returned by     using the kSecReturnPersistentRef key to SecItemCopyMatching or     SecItemAdd    * To delete multiple items specify kSecMatchItemList with an array     of references    * If more than one of these result keys is specified, the behavior is     undefined */ OSStatus SecItemDelete(CFDictionaryRef query)   __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_2_0);  CF_IMPLICIT_BRIDGING_DISABLED CF_ASSUME_NONNULL_END  __END_DECLS  #endif /* !_SECURITY_SECITEM_H_ */ 

/*    File: KeychainItemWrapperm  Abstract:  Objective-C wrapper for accessing a single keychain item    Version: 2    Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple  Inc ("Apple") in consideration of your agreement to the following  terms, and your use, installation, modification or redistribution of  this Apple software constitutes acceptance of these terms If you do  not agree with these terms, please do not use, install, modify or  redistribute this Apple software    In consideration of your agreement to abide by the following terms, and  subject to these terms, Apple grants you a personal, non-exclusive  license, under Apple's copyrights in this original Apple software (the  "Apple Software"), to use, reproduce, modify and redistribute the Apple  Software, with or without modifications, in source and/or binary forms;  provided that if you redistribute the Apple Software in its entirety and  without modifications, you must retain this notice and the following  text and disclaimers in all such redistributions of the Apple Software  Neither the name, trademarks, service marks or logos of Apple Inc may  be used to endorse or promote products derived from the Apple Software  without specific prior written permission from Apple Except as  expressly stated in this notice, no other rights or licenses, express or  implied, are granted by Apple herein, including but not limited to any  patent rights that may be infringed by your derivative works or by other  works in which the Apple Software may be incorporated    The Apple Software is provided by Apple on an "AS IS" basis APPLE  MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION  THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS  FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND  OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS    IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL  OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS  INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,  MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED  AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),  STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE  POSSIBILITY OF SUCH DAMAGE    Copyright (C) 2010 Apple Inc All Rights Reserved   */    #import "KeychainItemWrapperh" #import <Security/Securityh>   /*  These are the default constants and their respective types, available for the kSecClassGenericPassword Keychain Item class:  kSecAttrAccessGroup     -    CFStringRef kSecAttrCreationDate    -    CFDateRef kSecAttrModificationDate  -    CFDateRef kSecAttrDescription     -    CFStringRef kSecAttrComment       -    CFStringRef kSecAttrCreator       -    CFNumberRef kSecAttrType        -    CFNumberRef kSecAttrLabel        -    CFStringRef kSecAttrIsInvisible     -    CFBooleanRef kSecAttrIsNegative     -    CFBooleanRef kSecAttrAccount       -    CFStringRef kSecAttrService       -    CFStringRef kSecAttrGeneric       -    CFDataRef  See the header file Security/SecItemh for more details  */   @interface KeychainItemWrapper (PrivateMethods) /* The decision behind the following two methods (secItemFormatToDictionary and dictionaryToSecItemFormat) was to encapsulate the transition between what the detail view controller was expecting (NSString *) and what the Keychain API expects as a validly constructed container class */ - (NSMutableDictionary *)secItemFormatToDictionary:(NSDictionary *)dictionaryToConvert; - (NSMutableDictionary *)dictionaryToSecItemFormat:(NSDictionary *)dictionaryToConvert;   // Updates the item in the keychain, or adds it if it doesn't exist - (void)writeToKeychain;   @end   @implementation KeychainItemWrapper   @synthesize keychainItemData, genericPasswordQuery;   - (id)initWithIdentifier: (NSString *)identifier accessGroup:(NSString *) accessGroup; {   if (self = [super init])   {     // Begin Keychain search setup The genericPasswordQuery leverages the special user     // defined attribute kSecAttrGeneric to distinguish itself between other generic Keychain     // items which may be included by the same application     genericPasswordQuery = [[NSMutableDictionary alloc] init];          [genericPasswordQuery setObject:(id)kSecClassGenericPassword forKey:(id)kSecClass];     [genericPasswordQuery setObject:identifier forKey:(id)kSecAttrGeneric];          // The keychain access group attribute determines if this item can be shared     // amongst multiple apps whose code signing entitlements contain the same keychain access group     if (accessGroup != nil)     { #if TARGET_IPHONE_SIMULATOR       // Ignore the access group if running on the iPhone simulator       //        // Apps that are built for the simulator aren't signed, so there's no keychain access group       // for the simulator to check This means that all apps can see all keychain items when run       // on the simulator       //       // If a SecItem contains an access group attribute, SecItemAdd and SecItemUpdate on the       // simulator will return -25243 (errSecNoAccessForItem) #else             [genericPasswordQuery setObject:accessGroup forKey:(id)kSecAttrAccessGroup]; #endif     }          // Use the proper search constants, return only the attributes of the first match     [genericPasswordQuery setObject:(id)kSecMatchLimitOne forKey:(id)kSecMatchLimit];     [genericPasswordQuery setObject:(id)kCFBooleanTrue forKey:(id)kSecReturnAttributes];          NSDictionary *tempQuery = [NSDictionary dictionaryWithDictionary:genericPasswordQuery];          NSMutableDictionary *outDictionary = nil;          if (! SecItemCopyMatching((CFDictionaryRef)tempQuery, (CFTypeRef *)&outDictionary) == noErr)     {       // Stick these default values into keychain item if nothing found       [self resetKeychainItem];              // Add the generic attribute and the keychain access group       [keychainItemData setObject:identifier forKey:(id)kSecAttrGeneric];       if (accessGroup != nil)       { #if TARGET_IPHONE_SIMULATOR         // Ignore the access group if running on the iPhone simulator         //          // Apps that are built for the simulator aren't signed, so there's no keychain access group         // for the simulator to check This means that all apps can see all keychain items when run         // on the simulator         //         // If a SecItem contains an access group attribute, SecItemAdd and SecItemUpdate on the         // simulator will return -25243 (errSecNoAccessForItem) #else               [keychainItemData setObject:accessGroup forKey:(id)kSecAttrAccessGroup]; #endif       }     }     else     {       // load the saved data from Keychain       selfkeychainItemData = [self secItemFormatToDictionary:outDictionary];     }          [outDictionary release];   }      return self; }   - (void)dealloc {   [keychainItemData release];   [genericPasswordQuery release];      [super dealloc]; }   - (void)setObject:(id)inObject forKey:(id)key  {   if (inObject == nil) return;   id currentObject = [keychainItemData objectForKey:key];   if (![currentObject isEqual:inObject])   {     [keychainItemData setObject:inObject forKey:key];     [self writeToKeychain];   } }   - (id)objectForKey:(id)key {   return [keychainItemData objectForKey:key]; }   - (void)resetKeychainItem {   OSStatus junk = noErr;   if (!keychainItemData)    {     selfkeychainItemData = [[NSMutableDictionary alloc] init];   }   else if (keychainItemData)   {     NSMutableDictionary *tempDictionary = [self dictionaryToSecItemFormat:keychainItemData];     junk = SecItemDelete((CFDictionaryRef)tempDictionary);     NSAssert( junk == noErr || junk == errSecItemNotFound, @"Problem deleting current dictionary" );   }      // Default attributes for keychain item   [keychainItemData setObject:@"" forKey:(id)kSecAttrAccount];   [keychainItemData setObject:@"" forKey:(id)kSecAttrLabel];   [keychainItemData setObject:@"" forKey:(id)kSecAttrDescription];      // Default data for keychain item   [keychainItemData setObject:@"" forKey:(id)kSecValueData]; }   - (NSMutableDictionary *)dictionaryToSecItemFormat:(NSDictionary *)dictionaryToConvert {   // The assumption is that this method will be called with a properly populated dictionary   // containing all the right key/value pairs for a SecItem      // Create a dictionary to return populated with the attributes and data   NSMutableDictionary *returnDictionary = [NSMutableDictionary dictionaryWithDictionary:dictionaryToConvert];      // Add the Generic Password keychain item class attribute   [returnDictionary setObject:(id)kSecClassGenericPassword forKey:(id)kSecClass];      // Convert the NSString to NSData to meet the requirements for the value type kSecValueData   // This is where to store sensitive data that should be encrypted   NSString *passwordString = [dictionaryToConvert objectForKey:(id)kSecValueData];   [returnDictionary setObject:[passwordString dataUsingEncoding:NSUTF8StringEncoding] forKey:(id)kSecValueData];      return returnDictionary; }   - (NSMutableDictionary *)secItemFormatToDictionary:(NSDictionary *)dictionaryToConvert {   // The assumption is that this method will be called with a properly populated dictionary   // containing all the right key/value pairs for the UI element      // Create a dictionary to return populated with the attributes and data   NSMutableDictionary *returnDictionary = [NSMutableDictionary dictionaryWithDictionary:dictionaryToConvert];      // Add the proper search key and class attribute   [returnDictionary setObject:(id)kCFBooleanTrue forKey:(id)kSecReturnData];   [returnDictionary setObject:(id)kSecClassGenericPassword forKey:(id)kSecClass];      // Acquire the password data from the attributes   NSData *passwordData = NULL;   if (SecItemCopyMatching((CFDictionaryRef)returnDictionary, (CFTypeRef *)&passwordData) == noErr)   {     // Remove the search, class, and identifier key/value, we don't need them anymore     [returnDictionary removeObjectForKey:(id)kSecReturnData];          // Add the password to the dictionary, converting from NSData to NSString     NSString *password = [[[NSString alloc] initWithBytes:[passwordData bytes] length:[passwordData length]                             encoding:NSUTF8StringEncoding] autorelease];     [returnDictionary setObject:password forKey:(id)kSecValueData];   }   else   {     // Don't do anything if nothing is found     NSAssert(NO, @"Serious error, no matching item found in the keychain/n");   }      [passwordData release];      return returnDictionary; }   - (void)writeToKeychain {   NSDictionary *attributes = NULL;   NSMutableDictionary *updateItem = NULL;   OSStatus result;      if (SecItemCopyMatching((CFDictionaryRef)genericPasswordQuery, (CFTypeRef *)&attributes) == noErr)   {     // First we need the attributes from the Keychain     updateItem = [NSMutableDictionary dictionaryWithDictionary:attributes];     // Second we need to add the appropriate search key/values     [updateItem setObject:[genericPasswordQuery objectForKey:(id)kSecClass] forKey:(id)kSecClass];          // Lastly, we need to set up the updated attribute list being careful to remove the class     NSMutableDictionary *tempCheck = [self dictionaryToSecItemFormat:keychainItemData];     [tempCheck removeObjectForKey:(id)kSecClass];      #if TARGET_IPHONE_SIMULATOR     // Remove the access group if running on the iPhone simulator     //      // Apps that are built for the simulator aren't signed, so there's no keychain access group     // for the simulator to check This means that all apps can see all keychain items when run     // on the simulator     //     // If a SecItem contains an access group attribute, SecItemAdd and SecItemUpdate on the     // simulator will return -25243 (errSecNoAccessForItem)     //     // The access group attribute will be included in items returned by SecItemCopyMatching,     // which is why we need to remove it before updating the item     [tempCheck removeObjectForKey:(id)kSecAttrAccessGroup]; #endif          // An implicit assumption is that you can only update a single item at a time          result = SecItemUpdate((CFDictionaryRef)updateItem, (CFDictionaryRef)tempCheck);     NSAssert( result == noErr, @"Couldn't update the Keychain Item" );   }   else   {     // No previous item found; add the new one     result = SecItemAdd((CFDictionaryRef)[self dictionaryToSecItemFormat:keychainItemData], NULL);     NSAssert( result == noErr, @"Couldn't add the Keychain Item" );   } }   @end