mirror of
https://github.com/samsonjs/arq_restore.git
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113 lines
4.6 KiB
Objective-C
113 lines
4.6 KiB
Objective-C
/*
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Copyright (c) 2009-2014, Stefan Reitshamer http://www.haystacksoftware.com
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the names of PhotoMinds LLC or Haystack Software, nor the names of
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their contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#import "ArqSalt.h"
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#import "NSFileManager_extra.h"
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#import "UserLibrary_Arq.h"
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#import "Target.h"
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#import "TargetConnection.h"
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#import "Streams.h"
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#define SALT_LENGTH (8)
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@implementation ArqSalt
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- (id)initWithTarget:(Target *)theTarget
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targetUID:(uid_t)theTargetUID
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targetGID:(gid_t)theTargetGID
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computerUUID:(NSString *)theComputerUUID {
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if (self = [super init]) {
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target = [theTarget retain];
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uid = theTargetUID;
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gid = theTargetGID;
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computerUUID = [theComputerUUID retain];
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}
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return self;
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}
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- (void)dealloc {
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[target release];
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[computerUUID release];
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[super dealloc];
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}
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- (NSData *)saltWithTargetConnectionDelegate:(id<TargetConnectionDelegate>)theDelegate error:(NSError **)error {
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NSData *ret = [NSData dataWithContentsOfFile:[self localPath] options:NSUncachedRead error:error];
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if (ret == nil) {
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id <TargetConnection> targetConnection = [target newConnection];
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do {
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ret = [targetConnection saltDataForComputerUUID:computerUUID delegate:theDelegate error:error];
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if (ret != nil) {
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NSError *myError = nil;
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if (![[NSFileManager defaultManager] ensureParentPathExistsForPath:[self localPath] targetUID:uid targetGID:gid error:&myError]
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|| ![Streams writeData:ret atomicallyToFile:[self localPath] targetUID:uid targetGID:gid bytesWritten:NULL error:&myError]) {
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HSLogError(@"error caching salt data to %@: %@", [self localPath], myError);
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}
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}
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} while(0);
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[targetConnection release];
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}
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return ret;
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}
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- (BOOL)saveSalt:(NSData *)theSalt targetConnectionDelegate:(id<TargetConnectionDelegate>)theDelegate error:(NSError **)error {
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id <TargetConnection> targetConnection = [target newConnection];
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BOOL ret = YES;
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do {
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ret = [targetConnection setSaltData:theSalt forComputerUUID:computerUUID delegate:theDelegate error:error]
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&& [[NSFileManager defaultManager] ensureParentPathExistsForPath:[self localPath] targetUID:uid targetGID:gid error:error]
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&& [Streams writeData:theSalt atomicallyToFile:[self localPath] targetUID:uid targetGID:gid bytesWritten:NULL error:error];
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} while (0);
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[targetConnection release];
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return ret;
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}
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- (NSData *)createSaltWithTargetConnectionDelegate:(id<TargetConnectionDelegate>)theDelegate error:(NSError **)error {
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NSData *theSalt = [self createRandomSalt];
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if (![self saveSalt:theSalt targetConnectionDelegate:theDelegate error:error]) {
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return nil;
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}
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return theSalt;
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}
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#pragma mark internal
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- (NSData *)createRandomSalt {
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unsigned char buf[SALT_LENGTH];
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for (NSUInteger i = 0; i < SALT_LENGTH; i++) {
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buf[i] = (unsigned char)(rand() % 256);
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}
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return [[[NSData alloc] initWithBytes:buf length:SALT_LENGTH] autorelease];
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}
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- (NSString *)localPath {
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return [NSString stringWithFormat:@"%@/Cache.noindex/%@/%@/salt.dat", [UserLibrary arqUserLibraryPath], [target targetUUID], computerUUID];
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}
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@end
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