added files via upload

Tweaks/FLEX/GlobalStateExplorers/Keychain/FLEXKeychain.m

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+//
+//  FLEXKeychain.m
+//
+//  Forked from:
+//  SSKeychain.m in SSKeychain
+//  Created by Sam Soffes on 5/19/10.
+//  Copyright (c) 2010-2014 Sam Soffes. All rights reserved.
+//
+
+#import "FLEXKeychain.h"
+#import "FLEXKeychainQuery.h"
+
+NSString * const kFLEXKeychainErrorDomain = @"com.flipboard.flex";
+NSString * const kFLEXKeychainAccountKey = @"acct";
+NSString * const kFLEXKeychainCreatedAtKey = @"cdat";
+NSString * const kFLEXKeychainClassKey = @"labl";
+NSString * const kFLEXKeychainDescriptionKey = @"desc";
+NSString * const kFLEXKeychainGroupKey = @"agrp";
+NSString * const kFLEXKeychainLabelKey = @"labl";
+NSString * const kFLEXKeychainLastModifiedKey = @"mdat";
+NSString * const kFLEXKeychainWhereKey = @"svce";
+
+#if __IPHONE_4_0 && TARGET_OS_IPHONE
+static CFTypeRef FLEXKeychainAccessibilityType = NULL;
+#endif
+
+@implementation FLEXKeychain
+
++ (NSString *)passwordForService:(NSString *)serviceName account:(NSString *)account {
+    return [self passwordForService:serviceName account:account error:nil];
+}
+
++ (NSString *)passwordForService:(NSString *)serviceName account:(NSString *)account error:(NSError *__autoreleasing *)error {
+    FLEXKeychainQuery *query = [FLEXKeychainQuery new];
+    query.service = serviceName;
+    query.account = account;
+    [query fetch:error];
+    return query.password;
+}
+
++ (NSData *)passwordDataForService:(NSString *)serviceName account:(NSString *)account {
+    return [self passwordDataForService:serviceName account:account error:nil];
+}
+
++ (NSData *)passwordDataForService:(NSString *)serviceName account:(NSString *)account error:(NSError **)error {
+    FLEXKeychainQuery *query = [FLEXKeychainQuery new];
+    query.service = serviceName;
+    query.account = account;
+    [query fetch:error];
+    
+    return query.passwordData;
+}
+
++ (BOOL)deletePasswordForService:(NSString *)serviceName account:(NSString *)account {
+    return [self deletePasswordForService:serviceName account:account error:nil];
+}
+
++ (BOOL)deletePasswordForService:(NSString *)serviceName account:(NSString *)account error:(NSError *__autoreleasing *)error {
+    FLEXKeychainQuery *query = [FLEXKeychainQuery new];
+    query.service = serviceName;
+    query.account = account;
+    return [query deleteItem:error];
+}
+
++ (BOOL)setPassword:(NSString *)password forService:(NSString *)serviceName account:(NSString *)account {
+    return [self setPassword:password forService:serviceName account:account error:nil];
+}
+
++ (BOOL)setPassword:(NSString *)password forService:(NSString *)serviceName account:(NSString *)account error:(NSError *__autoreleasing *)error {
+    FLEXKeychainQuery *query = [FLEXKeychainQuery new];
+    query.service = serviceName;
+    query.account = account;
+    query.password = password;
+    return [query save:error];
+}
+
++ (BOOL)setPasswordData:(NSData *)password forService:(NSString *)serviceName account:(NSString *)account {
+    return [self setPasswordData:password forService:serviceName account:account error:nil];
+}
+
++ (BOOL)setPasswordData:(NSData *)password forService:(NSString *)serviceName account:(NSString *)account error:(NSError **)error {
+    FLEXKeychainQuery *query = [FLEXKeychainQuery new];
+    query.service = serviceName;
+    query.account = account;
+    query.passwordData = password;
+    return [query save:error];
+}
+
++ (NSArray *)allAccounts {
+    return [self allAccounts:nil] ?: @[];
+}
+
++ (NSArray *)allAccounts:(NSError *__autoreleasing *)error {
+    return [self accountsForService:nil error:error];
+}
+
++ (NSArray *)accountsForService:(NSString *)serviceName {
+    return [self accountsForService:serviceName error:nil];
+}
+
++ (NSArray *)accountsForService:(NSString *)serviceName error:(NSError *__autoreleasing *)error {
+    FLEXKeychainQuery *query = [FLEXKeychainQuery new];
+    query.service = serviceName;
+    return [query fetchAll:error];
+}
+
+#if __IPHONE_4_0 && TARGET_OS_IPHONE
++ (CFTypeRef)accessibilityType {
+    return FLEXKeychainAccessibilityType;
+}
+
++ (void)setAccessibilityType:(CFTypeRef)accessibilityType {
+    CFRetain(accessibilityType);
+    if (FLEXKeychainAccessibilityType) {
+        CFRelease(FLEXKeychainAccessibilityType);
+    }
+    FLEXKeychainAccessibilityType = accessibilityType;
+}
+#endif
+
+@end