BlobKeyIO.m

/*
 Copyright (c) 2009-2017, Haystack Software LLC https://www.arqbackup.com
 
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 * Redistributions of source code must retain the above copyright
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 * Redistributions in binary form must reproduce the above copyright
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 documentation and/or other materials provided with the distribution.
 
 * Neither the names of PhotoMinds LLC or Haystack Software, nor the names of
 their contributors may be used to endorse or promote products derived from
 this software without specific prior written permission.
 
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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#import "BlobKeyIO.h"
#import "BooleanIO.h"
#import "StringIO.h"
#import "IntegerIO.h"
#import "StorageType.h"
#import "BlobKey.h"
#import "DateIO.h"


@implementation BlobKeyIO
+ (void)write:(BlobKey *)theBlobKey to:(NSMutableData *)data {
    [StringIO write:[theBlobKey sha1] to:data];
    [BooleanIO write:[theBlobKey stretchEncryptionKey] to:data];
    [IntegerIO writeUInt32:(uint32_t)[theBlobKey storageType] to:data];
    [StringIO write:[theBlobKey archiveId] to:data];
    [IntegerIO writeUInt64:[theBlobKey archiveSize] to:data];
    [DateIO write:[theBlobKey archiveUploadedDate] to:data];
}
+ (BOOL)write:(BlobKey *)theBlobKey to:(BufferedOutputStream *)os error:(NSError **)error {
    return [StringIO write:[theBlobKey sha1] to:os error:error]
    && [BooleanIO write:[theBlobKey stretchEncryptionKey] to:os error:error]
    && [IntegerIO writeUInt32:(uint32_t)[theBlobKey storageType] to:os error:error]
    && [StringIO write:[theBlobKey archiveId] to:os error:error]
    && [IntegerIO writeUInt64:[theBlobKey archiveSize] to:os error:error]
    && [DateIO write:[theBlobKey archiveUploadedDate] to:os error:error];
}
+ (BOOL)read:(BlobKey **)theBlobKey from:(BufferedInputStream *)is treeVersion:(int)theTreeVersion compressionType:(BlobKeyCompressionType)theCompressionType error:(NSError **)error {
    NSString *dataSHA1;
    BOOL stretchEncryptionKey = NO;
    StorageType storageType = StorageTypeS3;
    NSString *archiveId = nil;
    uint64_t archiveSize = 0;
    NSDate *archiveUploadedDate = nil;
    
    if (![StringIO read:&dataSHA1 from:is error:error]) {
        return NO;
    }
    if (theTreeVersion >= 14 && ![BooleanIO read:&stretchEncryptionKey from:is error:error]) {
        return NO;
    }
    if (theTreeVersion >= 17) {
        if (![IntegerIO readUInt32:&storageType from:is error:error]
            || ![StringIO read:&archiveId from:is error:error]
            || ![IntegerIO readUInt64:&archiveSize from:is error:error]
            || ![DateIO read:&archiveUploadedDate from:is error:error]) {
            [self release];
            return NO;
        }
    }
    if (dataSHA1 == nil) {
        // This BlobKeyIO class has been writing nil BlobKeys as if they weren't nil,
        // and then reading the values in and creating bogus BlobKeys.
        // If the sha1 is nil, it must have been a nil BlobKey, so we return nil here.
        *theBlobKey = nil;
    } else {
        *theBlobKey = [[[BlobKey alloc] initWithStorageType:storageType archiveId:archiveId archiveSize:archiveSize archiveUploadedDate:archiveUploadedDate sha1:dataSHA1 stretchEncryptionKey:stretchEncryptionKey compressionType:theCompressionType error:error] autorelease];
        if (*theBlobKey == nil) {
            return NO;
        }
    }
    return YES;
}
@end