2013-02-14 17:59:12 +04:00
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//
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// SFHFKeychainUtils.m
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//
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// Created by Buzz Andersen on 10/20/08.
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// Based partly on code by Jonathan Wight, Jon Crosby, and Mike Malone.
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// Copyright 2008 Sci-Fi Hi-Fi. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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//
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#import "SFHFKeychainUtils.h"
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#import <Security/Security.h>
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static NSString *SFHFKeychainUtilsErrorDomain = @"SFHFKeychainUtilsErrorDomain";
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#if __IPHONE_OS_VERSION_MIN_REQUIRED < 30000 && TARGET_IPHONE_SIMULATOR
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@interface SFHFKeychainUtils (PrivateMethods)
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2019-11-06 17:24:51 +03:00
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+ (SecKeychainItemRef)getKeychainItemReferenceForUsername:(NSString *)username
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andServerName:(NSString *)serverName
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error:(NSError **)error;
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2013-02-14 17:59:12 +04:00
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@end
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#endif
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@implementation SFHFKeychainUtils
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#if __IPHONE_OS_VERSION_MIN_REQUIRED < 30000 && TARGET_IPHONE_SIMULATOR
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2019-11-06 17:24:51 +03:00
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+ (NSString *)getPasswordForUsername:(NSString *)username
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andServerName:(NSString *)serverName
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error:(NSError **)error
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{
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if (!username || !serviceName)
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{
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*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain code:-2000 userInfo:nil];
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2013-02-14 17:59:12 +04:00
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return nil;
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}
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2019-11-06 17:24:51 +03:00
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SecKeychainItemRef item = [SFHFKeychainUtils getKeychainItemReferenceForUsername:username
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andServerName:serverName
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error:error];
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if (*error || !item)
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{
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2013-02-14 17:59:12 +04:00
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return nil;
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}
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2019-11-06 17:24:51 +03:00
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2013-02-14 17:59:12 +04:00
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// from Advanced Mac OS X Programming, ch. 16
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2019-11-06 17:24:51 +03:00
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UInt32 length;
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char *password;
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SecKeychainAttribute attributes[8];
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SecKeychainAttributeList list;
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attributes[0].tag = kSecAccountItemAttr;
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attributes[1].tag = kSecDescriptionItemAttr;
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attributes[2].tag = kSecLabelItemAttr;
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attributes[3].tag = kSecModDateItemAttr;
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list.count = 4;
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list.attr = attributes;
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OSStatus status = SecKeychainItemCopyContent(item, NULL, &list, &length, (void **)&password);
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if (status != noErr)
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{
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*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain code:status userInfo:nil];
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2013-02-14 17:59:12 +04:00
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return nil;
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2019-11-06 17:24:51 +03:00
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}
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2013-02-14 17:59:12 +04:00
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NSString *passwordString = nil;
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2019-11-06 17:24:51 +03:00
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if (password != NULL)
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{
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2013-02-14 17:59:12 +04:00
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char passwordBuffer[1024];
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2019-11-06 17:24:51 +03:00
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if (length > 1023)
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{
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2013-02-14 17:59:12 +04:00
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length = 1023;
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}
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strncpy(passwordBuffer, password, length);
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2019-11-06 17:24:51 +03:00
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2013-02-14 17:59:12 +04:00
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passwordBuffer[length] = '\0';
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2022-02-01 18:19:43 +03:00
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passwordString = [NSString stringWithCString:passwordBuffer encoding:NSUTF8StringEncoding];
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2013-02-14 17:59:12 +04:00
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}
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2019-11-06 17:24:51 +03:00
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2013-02-14 17:59:12 +04:00
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SecKeychainItemFreeContent(&list, password);
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2019-11-06 17:24:51 +03:00
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CFRelease(item);
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return passwordString;
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2013-02-14 17:59:12 +04:00
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}
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2019-11-06 17:24:51 +03:00
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+ (void)storeUsername:(NSString *)username
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andPassword:(NSString *)password
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forServerName:(NSString *)serverName
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updateExisting:(BOOL)updateExisting
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error:(NSError **)error
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{
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if (!username || !password || !serverName)
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{
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*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain code:-2000 userInfo:nil];
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2013-02-14 17:59:12 +04:00
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return;
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}
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2019-11-06 17:24:51 +03:00
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2013-02-14 17:59:12 +04:00
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OSStatus status = noErr;
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2019-11-06 17:24:51 +03:00
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SecKeychainItemRef item = [SFHFKeychainUtils getKeychainItemReferenceForUsername:username
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andServerName:serverName
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error:error];
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if (*error && [*error code] != noErr)
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{
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2013-02-14 17:59:12 +04:00
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return;
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}
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2019-11-06 17:24:51 +03:00
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2013-02-14 17:59:12 +04:00
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*error = nil;
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2019-11-06 17:24:51 +03:00
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if (item)
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{
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status = SecKeychainItemModifyAttributesAndData(item, NULL, strlen([password UTF8String]),
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[password UTF8String]);
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2013-02-14 17:59:12 +04:00
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CFRelease(item);
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}
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2019-11-06 17:24:51 +03:00
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else
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{
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status = SecKeychainAddGenericPassword(
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NULL, strlen([serverName UTF8String]), [serverName UTF8String],
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strlen([username UTF8String]), [username UTF8String], strlen([password UTF8String]),
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[password UTF8String], NULL);
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2013-02-14 17:59:12 +04:00
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}
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2019-11-06 17:24:51 +03:00
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if (status != noErr)
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{
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*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain code:status userInfo:nil];
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2013-02-14 17:59:12 +04:00
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}
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}
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2019-11-06 17:24:51 +03:00
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+ (void)deleteItemForUsername:(NSString *)username
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andServerName:(NSString *)serverName
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error:(NSError **)error
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{
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if (!username || !serverName)
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{
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*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain code:2000 userInfo:nil];
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2013-02-14 17:59:12 +04:00
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return;
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}
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2019-11-06 17:24:51 +03:00
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2013-02-14 17:59:12 +04:00
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*error = nil;
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2019-11-06 17:24:51 +03:00
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SecKeychainItemRef item = [SFHFKeychainUtils getKeychainItemReferenceForUsername:username
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andServerName:serverName
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error:error];
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if (*error && [*error code] != noErr)
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{
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2013-02-14 17:59:12 +04:00
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return;
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}
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2019-11-06 17:24:51 +03:00
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2013-02-14 17:59:12 +04:00
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OSStatus status;
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2019-11-06 17:24:51 +03:00
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if (item)
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{
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2013-02-14 17:59:12 +04:00
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status = SecKeychainItemDelete(item);
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2019-11-06 17:24:51 +03:00
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2013-02-14 17:59:12 +04:00
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CFRelease(item);
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}
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2019-11-06 17:24:51 +03:00
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if (status != noErr)
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{
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*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain code:status userInfo:nil];
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2013-02-14 17:59:12 +04:00
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}
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}
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2019-11-06 17:24:51 +03:00
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+ (SecKeychainItemRef)getKeychainItemReferenceForUsername:(NSString *)username
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andServerName:(NSString *)serverName
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error:(NSError **)error
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{
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if (!username || !serverName)
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{
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*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain code:-2000 userInfo:nil];
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2013-02-14 17:59:12 +04:00
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return nil;
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}
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2019-11-06 17:24:51 +03:00
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2013-02-14 17:59:12 +04:00
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*error = nil;
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2019-11-06 17:24:51 +03:00
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2013-02-14 17:59:12 +04:00
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SecKeychainItemRef item;
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2019-11-06 17:24:51 +03:00
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OSStatus status = SecKeychainFindGenericPassword(
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NULL, strlen([serverName UTF8String]), [serverName UTF8String],
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strlen([username UTF8String]), [username UTF8String], NULL, NULL, &item);
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if (status != noErr)
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{
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if (status != errSecItemNotFound)
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{
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*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain
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code:status
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userInfo:nil];
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2013-02-14 17:59:12 +04:00
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}
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2019-11-06 17:24:51 +03:00
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return nil;
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2013-02-14 17:59:12 +04:00
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}
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2019-11-06 17:24:51 +03:00
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2013-02-14 17:59:12 +04:00
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return item;
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}
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#else
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2019-11-06 17:24:51 +03:00
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+ (NSString *)getPasswordForUsername:(NSString *)username
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andServerName:(NSString *)serverName
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error:(NSError **)error
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{
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if (!username || !serverName)
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{
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if (error != nil)
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{
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*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain code:-2000 userInfo:nil];
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2013-02-14 17:59:12 +04:00
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}
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return nil;
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}
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2019-11-06 17:24:51 +03:00
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if (error != nil)
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{
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2013-02-14 17:59:12 +04:00
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*error = nil;
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}
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2019-11-06 17:24:51 +03:00
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// Set up a query dictionary with the base query attributes: item type (generic), username, and
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// service
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NSArray *keys = [[[NSArray alloc]
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initWithObjects:(NSString *)kSecClass, kSecAttrAccount, kSecAttrService, nil] autorelease];
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NSArray *objects = [[[NSArray alloc] initWithObjects:(NSString *)kSecClassGenericPassword,
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username, serverName, nil] autorelease];
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NSMutableDictionary *query = [[[NSMutableDictionary alloc] initWithObjects:objects
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forKeys:keys] autorelease];
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// First do a query for attributes, in case we already have a Keychain item with no password
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// data set. One likely way such an incorrect item could have come about is due to the previous
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// (incorrect) version of this code (which set the password as a generic attribute instead of
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// password data).
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2013-02-14 17:59:12 +04:00
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NSDictionary *attributeResult = NULL;
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NSMutableDictionary *attributeQuery = [query mutableCopy];
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2019-11-06 17:24:51 +03:00
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[attributeQuery setObject:(id)kCFBooleanTrue forKey:(id)kSecReturnAttributes];
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OSStatus status =
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SecItemCopyMatching((CFDictionaryRef)attributeQuery, (CFTypeRef *)&attributeResult);
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2013-02-14 17:59:12 +04:00
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[attributeResult release];
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[attributeQuery release];
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2019-11-06 17:24:51 +03:00
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if (status != noErr)
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{
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2013-02-14 17:59:12 +04:00
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// No existing item found--simply return nil for the password
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2019-11-06 17:24:51 +03:00
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if (error != nil && status != errSecItemNotFound)
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{
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// Only return an error if a real exception happened--not simply for "not found."
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*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain
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code:status
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userInfo:nil];
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2013-02-14 17:59:12 +04:00
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}
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2019-11-06 17:24:51 +03:00
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2013-02-14 17:59:12 +04:00
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return nil;
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}
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2019-11-06 17:24:51 +03:00
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2013-02-14 17:59:12 +04:00
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// We have an existing item, now query for the password data associated with it.
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2019-11-06 17:24:51 +03:00
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2013-02-14 17:59:12 +04:00
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NSData *resultData = nil;
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NSMutableDictionary *passwordQuery = [query mutableCopy];
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2019-11-06 17:24:51 +03:00
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[passwordQuery setObject:(id)kCFBooleanTrue forKey:(id)kSecReturnData];
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status = SecItemCopyMatching((CFDictionaryRef)passwordQuery, (CFTypeRef *)&resultData);
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2013-02-14 17:59:12 +04:00
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[resultData autorelease];
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[passwordQuery release];
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2019-11-06 17:24:51 +03:00
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if (status != noErr)
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{
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if (status == errSecItemNotFound)
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{
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// We found attributes for the item previously, but no password now, so return a special
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// error. Users of this API will probably want to detect this error and prompt the user
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// to re-enter their credentials. When you attempt to store the re-entered credentials
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2013-02-14 17:59:12 +04:00
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// using storeUsername:andPassword:forServiceName:updateExisting:error
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// the old, incorrect entry will be deleted and a new one with a properly encrypted
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// password will be added.
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2019-11-06 17:24:51 +03:00
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if (error != nil)
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{
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*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain
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code:-1999
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userInfo:nil];
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2013-02-14 17:59:12 +04:00
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}
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}
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2019-11-06 17:24:51 +03:00
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else
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{
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2013-02-14 17:59:12 +04:00
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// Something else went wrong. Simply return the normal Keychain API error code.
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2019-11-06 17:24:51 +03:00
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if (error != nil)
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{
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*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain
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code:status
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userInfo:nil];
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2013-02-14 17:59:12 +04:00
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}
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}
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2019-11-06 17:24:51 +03:00
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2013-02-14 17:59:12 +04:00
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return nil;
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}
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2019-11-06 17:24:51 +03:00
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NSString *password = nil;
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|
|
|
|
|
|
if (resultData)
|
|
|
|
{
|
|
|
|
password = [[NSString alloc] initWithData:resultData encoding:NSUTF8StringEncoding];
|
2013-02-14 17:59:12 +04:00
|
|
|
}
|
2019-11-06 17:24:51 +03:00
|
|
|
else
|
|
|
|
{
|
|
|
|
// There is an existing item, but we weren't able to get password data for it for some
|
|
|
|
// reason, Possibly as a result of an item being incorrectly entered by the previous code.
|
2013-02-14 17:59:12 +04:00
|
|
|
// Set the -1999 error so the code above us can prompt the user again.
|
2019-11-06 17:24:51 +03:00
|
|
|
if (error != nil)
|
|
|
|
{
|
|
|
|
*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain code:-1999 userInfo:nil];
|
2013-02-14 17:59:12 +04:00
|
|
|
}
|
|
|
|
}
|
2019-11-06 17:24:51 +03:00
|
|
|
|
2013-02-14 17:59:12 +04:00
|
|
|
return [password autorelease];
|
|
|
|
}
|
|
|
|
|
2019-11-06 17:24:51 +03:00
|
|
|
+ (BOOL)storeUsername:(NSString *)username
|
|
|
|
andPassword:(NSString *)password
|
|
|
|
forServerName:(NSString *)serverName
|
|
|
|
updateExisting:(BOOL)updateExisting
|
|
|
|
error:(NSError **)error
|
|
|
|
{
|
|
|
|
if (!username || !password || !serverName)
|
|
|
|
{
|
|
|
|
if (error != nil)
|
|
|
|
{
|
|
|
|
*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain code:-2000 userInfo:nil];
|
2013-02-14 17:59:12 +04:00
|
|
|
}
|
|
|
|
return NO;
|
|
|
|
}
|
2019-11-06 17:24:51 +03:00
|
|
|
|
2013-02-14 17:59:12 +04:00
|
|
|
// See if we already have a password entered for these credentials.
|
|
|
|
NSError *getError = nil;
|
2019-11-06 17:24:51 +03:00
|
|
|
NSString *existingPassword = [SFHFKeychainUtils getPasswordForUsername:username
|
|
|
|
andServerName:serverName
|
|
|
|
error:&getError];
|
|
|
|
|
|
|
|
if ([getError code] == -1999)
|
|
|
|
{
|
|
|
|
// There is an existing entry without a password properly stored (possibly as a result of
|
|
|
|
// the previous incorrect version of this code. Delete the existing item before moving on
|
|
|
|
// entering a correct one.
|
|
|
|
|
2013-02-14 17:59:12 +04:00
|
|
|
getError = nil;
|
2019-11-06 17:24:51 +03:00
|
|
|
|
|
|
|
[self deleteItemForUsername:username andServerName:serverName error:&getError];
|
|
|
|
|
|
|
|
if ([getError code] != noErr)
|
|
|
|
{
|
|
|
|
if (error != nil)
|
|
|
|
{
|
2013-02-14 17:59:12 +04:00
|
|
|
*error = getError;
|
|
|
|
}
|
|
|
|
return NO;
|
|
|
|
}
|
|
|
|
}
|
2019-11-06 17:24:51 +03:00
|
|
|
else if ([getError code] != noErr)
|
|
|
|
{
|
|
|
|
if (error != nil)
|
|
|
|
{
|
2013-02-14 17:59:12 +04:00
|
|
|
*error = getError;
|
|
|
|
}
|
|
|
|
return NO;
|
|
|
|
}
|
2019-11-06 17:24:51 +03:00
|
|
|
|
|
|
|
if (error != nil)
|
|
|
|
{
|
2013-02-14 17:59:12 +04:00
|
|
|
*error = nil;
|
|
|
|
}
|
2019-11-06 17:24:51 +03:00
|
|
|
|
2013-02-14 17:59:12 +04:00
|
|
|
OSStatus status = noErr;
|
2019-11-06 17:24:51 +03:00
|
|
|
|
|
|
|
if (existingPassword)
|
|
|
|
{
|
2013-02-14 17:59:12 +04:00
|
|
|
// We have an existing, properly entered item with a password.
|
|
|
|
// Update the existing item.
|
2019-11-06 17:24:51 +03:00
|
|
|
|
|
|
|
if (![existingPassword isEqualToString:password] && updateExisting)
|
|
|
|
{
|
|
|
|
// Only update if we're allowed to update existing. If not, simply do nothing.
|
|
|
|
|
|
|
|
NSArray *keys =
|
|
|
|
[[[NSArray alloc] initWithObjects:(NSString *)kSecClass, kSecAttrService,
|
|
|
|
kSecAttrLabel, kSecAttrAccount, nil] autorelease];
|
|
|
|
|
|
|
|
NSArray *objects =
|
|
|
|
[[[NSArray alloc] initWithObjects:(NSString *)kSecClassGenericPassword, serverName,
|
|
|
|
serverName, username, nil] autorelease];
|
|
|
|
|
|
|
|
NSDictionary *query = [[[NSDictionary alloc] initWithObjects:objects
|
|
|
|
forKeys:keys] autorelease];
|
|
|
|
|
|
|
|
status = SecItemUpdate(
|
|
|
|
(CFDictionaryRef)query,
|
|
|
|
(CFDictionaryRef)[NSDictionary
|
|
|
|
dictionaryWithObject:[password dataUsingEncoding:NSUTF8StringEncoding]
|
|
|
|
forKey:(NSString *)kSecValueData]);
|
2013-02-14 17:59:12 +04:00
|
|
|
}
|
|
|
|
}
|
2019-11-06 17:24:51 +03:00
|
|
|
else
|
|
|
|
{
|
2013-02-14 17:59:12 +04:00
|
|
|
// No existing entry (or an existing, improperly entered, and therefore now
|
|
|
|
// deleted, entry). Create a new entry.
|
2019-11-06 17:24:51 +03:00
|
|
|
|
|
|
|
NSArray *keys =
|
|
|
|
[[[NSArray alloc] initWithObjects:(NSString *)kSecClass, kSecAttrService, kSecAttrLabel,
|
|
|
|
kSecAttrAccount, kSecValueData, nil] autorelease];
|
|
|
|
|
|
|
|
NSArray *objects = [[[NSArray alloc]
|
|
|
|
initWithObjects:(NSString *)kSecClassGenericPassword, serverName, serverName, username,
|
|
|
|
[password dataUsingEncoding:NSUTF8StringEncoding], nil] autorelease];
|
|
|
|
|
|
|
|
NSDictionary *query = [[[NSDictionary alloc] initWithObjects:objects
|
|
|
|
forKeys:keys] autorelease];
|
|
|
|
|
|
|
|
status = SecItemAdd((CFDictionaryRef)query, NULL);
|
2013-02-14 17:59:12 +04:00
|
|
|
}
|
2019-11-06 17:24:51 +03:00
|
|
|
|
|
|
|
if (error != nil && status != noErr)
|
|
|
|
{
|
2013-02-14 17:59:12 +04:00
|
|
|
// Something went wrong with adding the new item. Return the Keychain error code.
|
2019-11-06 17:24:51 +03:00
|
|
|
*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain code:status userInfo:nil];
|
|
|
|
|
|
|
|
return NO;
|
2013-02-14 17:59:12 +04:00
|
|
|
}
|
2019-11-06 17:24:51 +03:00
|
|
|
|
|
|
|
return YES;
|
2013-02-14 17:59:12 +04:00
|
|
|
}
|
|
|
|
|
2019-11-06 17:24:51 +03:00
|
|
|
+ (BOOL)deleteItemForUsername:(NSString *)username
|
|
|
|
andServerName:(NSString *)serverName
|
|
|
|
error:(NSError **)error
|
2013-02-14 17:59:12 +04:00
|
|
|
{
|
2019-11-06 17:24:51 +03:00
|
|
|
if (!username || !serverName)
|
|
|
|
{
|
|
|
|
if (error != nil)
|
|
|
|
{
|
|
|
|
*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain code:-2000 userInfo:nil];
|
2013-02-14 17:59:12 +04:00
|
|
|
}
|
|
|
|
return NO;
|
|
|
|
}
|
2019-11-06 17:24:51 +03:00
|
|
|
|
|
|
|
if (error != nil)
|
|
|
|
{
|
2013-02-14 17:59:12 +04:00
|
|
|
*error = nil;
|
|
|
|
}
|
2019-11-06 17:24:51 +03:00
|
|
|
|
|
|
|
NSArray *keys =
|
|
|
|
[[[NSArray alloc] initWithObjects:(NSString *)kSecClass, kSecAttrAccount, kSecAttrService,
|
|
|
|
kSecReturnAttributes, nil] autorelease];
|
|
|
|
NSArray *objects =
|
|
|
|
[[[NSArray alloc] initWithObjects:(NSString *)kSecClassGenericPassword, username,
|
|
|
|
serverName, kCFBooleanTrue, nil] autorelease];
|
|
|
|
|
|
|
|
NSDictionary *query = [[[NSDictionary alloc] initWithObjects:objects forKeys:keys] autorelease];
|
|
|
|
|
|
|
|
OSStatus status = SecItemDelete((CFDictionaryRef)query);
|
|
|
|
|
|
|
|
if (error != nil && status != noErr)
|
|
|
|
{
|
|
|
|
*error = [NSError errorWithDomain:SFHFKeychainUtilsErrorDomain code:status userInfo:nil];
|
|
|
|
|
|
|
|
return NO;
|
2013-02-14 17:59:12 +04:00
|
|
|
}
|
2019-11-06 17:24:51 +03:00
|
|
|
|
|
|
|
return YES;
|
2013-02-14 17:59:12 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
2022-02-01 18:19:43 +03:00
|
|
|
@end
|