/*
* Copyright (c) 2016, Jonathan Schleifer <js@heap.zone>
*
* https://heap.zone/git/?p=scrypt-pwgen.git
*
* 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.
*/
#include <unistd.h>
#import "ScryptPWGen.h"
#import "NewPasswordGenerator.h"
#import "LegacyPasswordGenerator.h"
OF_APPLICATION_DELEGATE(ScryptPWGen)
static void
showHelp(OFStream *output, bool verbose)
{
[output writeFormat: @"Usage: %@ [-hlr] site\n",
[OFApplication programName]];
if (verbose)
[output writeString:
@"\n"
@"Options:\n"
@" -h --help Show this help\n"
@" -l --length Length for the derived password\n"
@" -L --legacy Use the legacy algorithm "
@"(compatible with scrypt-genpass)\n"
@" -r --repeat Repeat input\n"];
}
@implementation ScryptPWGen
- (void)applicationDidFinishLaunching
{
OFString *lengthStr;
const of_options_parser_option_t options[] = {
{ 'h', @"help", 0, NULL, NULL },
{ 'l', @"length", 1, NULL, &lengthStr },
{ 'L', @"legacy", 0, &_legacy, NULL },
{ 'r', @"repeat", 0, &_repeat, NULL },
{ '\0', nil, 0, NULL, NULL }
};
OFOptionsParser *optionsParser =
[OFOptionsParser parserWithOptions: options];
of_unichar_t option;
char *passphrase;
OFString *prompt;
while ((option = [optionsParser nextOption]) != '\0') {
switch (option) {
case 'h':
showHelp(of_stdout, true);
[OFApplication terminate];
break;
case ':':
if (optionsParser.lastLongOption != nil)
[of_stderr writeFormat:
@"%@: Argument for option --%@ missing\n",
[OFApplication programName],
optionsParser.lastLongOption];
else
[of_stderr writeFormat:
@"%@: Argument for option -%C missing\n",
[OFApplication programName],
optionsParser.lastOption];
[OFApplication terminateWithStatus: 1];
break;
case '?':
if (optionsParser.lastLongOption != nil)
[of_stderr writeFormat:
@"%@: Unknown option: --%@\n",
[OFApplication programName],
optionsParser.lastLongOption];
else
[of_stderr writeFormat:
@"%@: Unknown option: -%C\n",
[OFApplication programName],
optionsParser.lastOption];
[OFApplication terminateWithStatus: 1];
break;
}
}
if ([[optionsParser remainingArguments] count] != 1) {
showHelp(of_stderr, false);
[OFApplication terminateWithStatus: 1];
}
id <PasswordGenerator> generator = (_legacy
? [LegacyPasswordGenerator generator]
: [NewPasswordGenerator generator]);
generator.site = [[optionsParser remainingArguments] firstObject];
if (lengthStr != nil) {
bool invalid = false;
@try {
generator.length = (size_t)[lengthStr decimalValue];
} @catch (OFInvalidFormatException *e) {
invalid = true;
} @catch (OFOutOfRangeException *e) {
invalid = true;
}
if (invalid) {
[of_stderr writeFormat:
@"%@: Invalid length: %@\n",
[OFApplication programName], lengthStr];
[OFApplication terminateWithStatus: 1];
}
}
prompt = [OFString stringWithFormat: @"Passphrase for site \"%@\": ",
generator.site];
passphrase = getpass(
[prompt cStringWithEncoding: [OFLocalization encoding]]);
@try {
if (_repeat) {
char *passphraseCopy = of_strdup(passphrase);
if (passphraseCopy == NULL)
@throw [OFOutOfMemoryException exception];
@try {
of_string_encoding_t encoding =
[OFLocalization encoding];
prompt = [OFString stringWithFormat:
@"Repeat passphrase for site \"%@\": ",
generator.site];
passphrase = getpass(
[prompt cStringWithEncoding: encoding]);
if (strcmp(passphrase, passphraseCopy) != 0) {
[of_stderr writeString:
@"Passphrases do not match!\n"];
[OFApplication terminateWithStatus: 1];
}
} @finally {
of_explicit_memset(passphraseCopy, 0,
strlen(passphraseCopy));
free(passphraseCopy);
}
}
generator.passphrase = passphrase;
[generator derivePassword];
@try {
[of_stdout writeBuffer: generator.output
length: generator.length];
[of_stdout writeBuffer: "\n"
length: 1];
} @finally {
of_explicit_memset(generator.output, 0,
generator.length);
}
} @finally {
of_explicit_memset(passphrase, 0, strlen(passphrase));
}
[OFApplication terminate];
}
@end