Overview
Comment: | Initial commit |
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Timelines: | family | descendants | trunk |
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SHA3-256: |
436404486438d930e5f23b94f527263d |
User & Date: | js on 2016-10-01 22:46:44 |
Other Links: | manifest | tags |
Context
2016-10-03
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11:40 | Move actual password derivation to separate class check-in: 617d8a7cfb user: js tags: trunk | |
2016-10-01
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22:46 | Initial commit check-in: 4364044864 user: js tags: trunk | |
Changes
Added Makefile version [5e950ed0ff].
> > | 1 2 | all: @objfw-compile -o scrypt-pwgen *.m |
Added ScryptPWGen.h version [ec12f8880c].
> > > > > > > > | 1 2 3 4 5 6 7 8 | #import <ObjFW/ObjFW.h> @interface ScryptPWGen: OFObject <OFApplicationDelegate> { size_t _length; bool _repeat; } @end |
Added ScryptPWGen.m version [8240695fb9].
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 | #include <string.h> #include <unistd.h> #import "ScryptPWGen.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" @" -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 }, { 'r', @"repeat", 0, &_repeat, NULL }, { '\0', nil, 0, NULL, NULL } }; OFOptionsParser *optionsParser = [OFOptionsParser parserWithOptions: options]; of_unichar_t option; OFString *site, *prompt; char *passphrase; OFSHA256Hash *siteHash; unsigned char *output; 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 (lengthStr != nil) { @try { _length = (size_t)[lengthStr decimalValue]; if (_length < 3) @throw [OFInvalidFormatException exception]; } @catch (OFInvalidFormatException *e) { [of_stderr writeFormat: @"%@: Invalid length: %@\n", [OFApplication programName], lengthStr]; [OFApplication terminateWithStatus: 1]; } } else _length = 16; if ([[optionsParser remainingArguments] count] != 1) { showHelp(of_stderr, false); [OFApplication terminateWithStatus: 1]; } site = [[optionsParser remainingArguments] firstObject]; siteHash = [OFSHA256Hash cryptoHash]; [siteHash updateWithBuffer: [site UTF8String] length: [site UTF8StringLength]]; prompt = [OFString stringWithFormat: @"Passphrase for site \"%@\": ", site]; passphrase = getpass([prompt cStringWithEncoding: [OFSystemInfo native8BitEncoding]]); output = [self allocMemoryWithSize: _length + 1]; of_scrypt(8, 524288, 2, [siteHash digest], [[siteHash class] digestSize], passphrase, strlen(passphrase), output, _length); of_explicit_memset(passphrase, 0, strlen(passphrase)); /* * This has a bias, but is what scrypt-genpass does. This should be * compatible to passwords generated by scrypt-genpass for now to allow * an easy migration. * * This will be replaced with something better later on and the current * code only available in legacy mode (which can be enabled using a * flag). */ output[0] = "abcdefghijklmnopqrstuvwxyz"[output[0] % 26]; output[1] = "0123456789"[output[1] % 10]; output[2] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"[output[2] % 26]; for (size_t i = 3; i < _length; i++) output[i] = "abcdefghijklmnopqrstuvwxyz" "ABCDEFGHIJKLMNOPQRSTUVWXYZ" "0123456789"[output[i] % (26 + 26 + 10)]; output[_length] = '\n'; [of_stdout writeBuffer: output length: _length + 1]; of_explicit_memset(output, 0, _length + 1); [OFApplication terminate]; } @end |