Jonathan Schleifer
36f0d082b5
FossilOrigin-Name: a703cf8d6222e8aca351e4c12932a95bca938f838dff8a79c875f5ba01742596
99 lines
3.2 KiB
Objective-C
99 lines
3.2 KiB
Objective-C
/*
|
|
* Copyright (c) 2016 - 2021 Jonathan Schleifer <js@nil.im>
|
|
*
|
|
* https://fossil.nil.im/cryptopassphrase
|
|
*
|
|
* Permission to use, copy, modify, and/or distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice is present in all copies.
|
|
*
|
|
* 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, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#import "NewPasswordGenerator.h"
|
|
|
|
@implementation NewPasswordGenerator
|
|
@synthesize length = _length, site = _site, keyFile = _keyFile;
|
|
@synthesize passphrase = _passphrase, output = _output;
|
|
|
|
+ (instancetype)generator
|
|
{
|
|
return [[[self alloc] init] autorelease];
|
|
}
|
|
|
|
- (instancetype)init
|
|
{
|
|
self = [super init];
|
|
|
|
_length = 16;
|
|
|
|
return self;
|
|
}
|
|
|
|
- (void)derivePassword
|
|
{
|
|
OFSHA384Hash *siteHash = [OFSHA384Hash
|
|
cryptoHashWithAllowsSwappableMemory: true];
|
|
size_t passphraseLength, combinedPassphraseLength;
|
|
OFSecureData *combinedPassphrase;
|
|
char *combinedPassphraseItems;
|
|
unsigned char *outputItems;
|
|
|
|
[siteHash updateWithBuffer: _site.UTF8String
|
|
length: _site.UTF8StringLength];
|
|
|
|
[_output release];
|
|
_output = nil;
|
|
_output = [[OFSecureData alloc] initWithCount: _length + 1
|
|
allowsSwappableMemory: false];
|
|
|
|
passphraseLength = combinedPassphraseLength = _passphrase.count - 1;
|
|
if (_keyFile != nil) {
|
|
if (SIZE_MAX - combinedPassphraseLength < _keyFile.count)
|
|
@throw [OFOutOfRangeException exception];
|
|
|
|
combinedPassphraseLength += _keyFile.count;
|
|
}
|
|
|
|
combinedPassphrase = [OFSecureData
|
|
dataWithCount: combinedPassphraseLength
|
|
allowsSwappableMemory: false];
|
|
combinedPassphraseItems = combinedPassphrase.mutableItems;
|
|
memcpy(combinedPassphraseItems, _passphrase.items, passphraseLength);
|
|
|
|
if (_keyFile != nil)
|
|
memcpy(combinedPassphraseItems + passphraseLength,
|
|
_keyFile.items, _keyFile.count);
|
|
|
|
outputItems = _output.mutableItems;
|
|
of_scrypt((of_scrypt_parameters_t){
|
|
.blockSize = 8,
|
|
.costFactor = 524288,
|
|
.parallelization = 2,
|
|
.salt = siteHash.digest,
|
|
.saltLength = [siteHash.class digestSize],
|
|
.password = combinedPassphraseItems,
|
|
.passwordLength = combinedPassphraseLength,
|
|
.key = outputItems,
|
|
.keyLength = _length,
|
|
.allowsSwappableMemory = false
|
|
});
|
|
|
|
for (size_t i = 0; i < _length; i++)
|
|
outputItems[i] =
|
|
"123456789"
|
|
"abcdefghijkmnopqrstuvwxyz"
|
|
"ABCDEFGHJKLMNPQRSTUVWXYZ"
|
|
"#$%-=?"[outputItems[i] & 0x3F];
|
|
}
|
|
@end
|