forked from kherel/selfprivacy.org.app
change password generator
parent
8ea1b28d73
commit
1202e4ad53
@ -1,138 +1,99 @@
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import 'dart:math';
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var generator = PasswordGenerator();
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String genPass() {
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generator.generate(8);
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return generator.getGeneratedValue();
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}
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///Generates a password.
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///
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///The password [_generatedValue] is of a specified length, including letters [_letterGen] of mixed cases,
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///numbers [_numGen], and symbols[_symGen] depending on user choice.
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class PasswordGenerator {
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late bool _letterGen;
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late bool _numGen;
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late bool _symGen;
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late String _generatedValue;
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///Constructor.
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///
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///[_letterGen] is true to make password generation possible from the opening of the application, and
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///[_generatedValue] is intialized to the value below so the text containing it can be first generated
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///upon users request
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PasswordGenerator() {
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_letterGen = true;
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_numGen = true;
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_symGen = false;
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_generatedValue = "Press Generate";
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}
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///Call to generate a value, of [n] length
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void generate(int n) {
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//Discards the old value
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_generatedValue = "";
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///Cannot generate a value without any character types selected
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if (!_letterGen && !_numGen && !_symGen) {
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_generatedValue = "No character type selected";
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return;
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Random _rnd = Random();
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typedef StringGeneratorFunction = String Function();
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class StringGenerators {
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static const letters = 'abcdefghijklmnopqrstuvwxyz';
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static const numbers = '1234567890';
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static const symbols = '_';
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static String getRandomString(
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int length, {
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hasLowercaseLetters = false,
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hasUppercaseLetters = false,
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hasNumbers = false,
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hasSymbols = false,
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isStrict = false,
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}) {
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var chars = '';
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if (hasLowercaseLetters) chars += letters;
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if (hasUppercaseLetters) chars += letters.toUpperCase();
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if (hasNumbers) chars += numbers;
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if (hasSymbols) chars += symbols;
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assert(chars.isNotEmpty, 'chart empty');
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if (!isStrict) {
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return genString(length, chars);
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}
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///'Randomly' selectes caracter type to generate and append [toAppend] to [_generatedValue]
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// ignore: unnecessary_statements
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for (n; n > 0; n--) {
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String? toAppend;
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var random = new Random();
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///loops until a valid character is generated, meaning the user has to check the character value
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///to be generated. 'Randomly' picks a character type.
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while (toAppend == null) {
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int selector = random.nextInt(3);
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if (selector == 0) {
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toAppend = _generateLetter();
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} else if (selector == 1) {
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toAppend = _generateNumber();
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} else {
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toAppend = _generateSymbol();
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}
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}
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_generatedValue += toAppend;
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toAppend = null;
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var res = '';
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var loose = length;
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if (hasLowercaseLetters) {
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loose -= 1;
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res += genString(1, letters);
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}
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}
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///Generates a letter when called.
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String _generateLetter() {
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if (!_letterGen) return '';
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///Finds the integer value for the range between a-z and A-Z, with [base] UTF-16 value for lowercase letters and
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///[baseUpper] UTF-16 value for uppercase letters
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int base = "a".codeUnitAt(0);
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int baseUpper = "A".codeUnitAt(0);
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int maxRand = ("z".codeUnitAt(0) - base) + 1;
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Random random = new Random();
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///Randomly selects between upper and lower case generation, randomly generates value from [maxRand], then adding base,
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///which creates a UTF-16 encoded character to be converted into a string of one character between a-z/A-Z.
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///This string is then returned.
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if (random.nextInt(2) == 0) {
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return String.fromCharCodes([random.nextInt(maxRand) + base]);
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} else {
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return String.fromCharCodes([random.nextInt(maxRand) + baseUpper]);
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if (hasUppercaseLetters) {
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loose -= 1;
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res += genString(1, letters.toUpperCase());
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}
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}
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///Generates a number when called
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String? _generateNumber() {
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if (!_numGen) return null;
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///Finds the integer value for the range between 0-9
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int base = "0".codeUnitAt(0);
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int maxRand = ("9".codeUnitAt(0) - base) + 1;
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Random random = new Random();
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///Randomly generates value from [maxRand], then adding base, which creates a UTF-16 encoded character to be converted into a
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///string of one character between 0-9. This string is then returned.
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return String.fromCharCodes([random.nextInt(maxRand) + base]);
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}
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///Generates a symbol when called
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String? _generateSymbol() {
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if (!_symGen) return null;
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///Finds the integer value for the range between symbols !-.
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///(note) which includes symbols !"#$%&'()*+,=.
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int base = "!".codeUnitAt(0);
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int maxRand = (".".codeUnitAt(0) - base) + 1;
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Random random = new Random();
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///Randomly generates value from [maxRand], then adding base, which creates a UTF-16 encoded character to be
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///converted into a string of one character between !-. . This string is then returned.
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return String.fromCharCodes([random.nextInt(maxRand) + base]);
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}
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///Toggles letter generation
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void checkLetterGen(bool value) {
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_letterGen = value;
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}
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if (hasNumbers) {
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loose -= 1;
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res += genString(1, numbers.toUpperCase());
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}
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if (hasSymbols) {
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loose -= 1;
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res += genString(1, symbols);
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}
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res += genString(loose, chars);
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///Toggles number generation
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void checkNumGen(bool value) {
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_numGen = value;
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var shuffledlist = res.split('')..shuffle();
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return shuffledlist.join();
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}
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///Toggles symbol generation
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void checkSymGen(bool value) {
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_symGen = value;
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static String genString(int length, String chars) {
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return String.fromCharCodes(
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Iterable.generate(
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length,
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(_) => chars.codeUnitAt(
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_rnd.nextInt(chars.length),
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),
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),
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);
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}
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///Returns the generated value to be used by generator app
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String getGeneratedValue() {
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return _generatedValue;
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}
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static StringGeneratorFunction userPassword = () => getRandomString(
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8,
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hasLowercaseLetters: true,
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hasUppercaseLetters: true,
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hasNumbers: true,
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isStrict: true,
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);
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static StringGeneratorFunction passwordSalt = () => getRandomString(
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8,
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hasLowercaseLetters: true,
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);
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static StringGeneratorFunction simpleId = () => getRandomString(
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5,
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hasLowercaseLetters: true,
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);
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static StringGeneratorFunction dbPassword = () => getRandomString(
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40,
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hasLowercaseLetters: true,
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hasUppercaseLetters: true,
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hasNumbers: true,
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hasSymbols: true,
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);
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static StringGeneratorFunction dbStorageName = () => getRandomString(
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6,
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hasLowercaseLetters: true,
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hasUppercaseLetters: true,
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hasNumbers: true,
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);
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}
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@ -1,14 +0,0 @@
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import 'dart:math';
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const _chars =
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'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz1234567890_';
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Random _rnd = Random();
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String getRandomString(int length, [chars = _chars]) => String.fromCharCodes(
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Iterable.generate(
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length,
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(_) => chars.codeUnitAt(
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_rnd.nextInt(chars.length),
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),
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),
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);
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@ -1,30 +1,122 @@
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// This is a basic Flutter widget test.
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//
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// To perform an interaction with a widget in your test, use the WidgetTester
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// utility that Flutter provides. For example, you can send tap and scroll
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// gestures. You can also use WidgetTester to find child widgets in the widget
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// tree, read text, and verify that the values of widget properties are correct.
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import 'package:flutter/material.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:selfprivacy/main.dart';
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import 'package:selfprivacy/utils/password_generator.dart';
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void main() {
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testWidgets('Counter increments smoke test', (WidgetTester tester) async {
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// Build our app and trigger a frame.
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await tester.pumpWidget(MyApp());
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group('StringGenerators', () {
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group('Basic', () {
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test('assert chart empty', () {
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expect(() {
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StringGenerators.getRandomString(8);
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}, throwsAssertionError);
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});
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// Verify that our counter starts at 0.
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expect(find.text('0'), findsOneWidget);
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expect(find.text('1'), findsNothing);
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test('only lowercase string', () {
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var length = 8;
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var generatedString =
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StringGenerators.getRandomString(length, hasLowercaseLetters: true);
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// Tap the '+' icon and trigger a frame.
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await tester.tap(find.byIcon(Icons.add));
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await tester.pump();
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expect(generatedString, isNot(matches(regExpNewLines)));
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expect(generatedString, isNot(matches(regExpWhiteSpaces)));
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expect(generatedString, isNot(matches(regExpNumbers)));
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expect(generatedString, isNot(matches(regExpUppercaseLetters)));
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expect(generatedString, isNot(matches(regExpSymbols)));
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expect(generatedString.length, equals(length));
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expect(generatedString, matches(regExpLowercaseLetters));
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});
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// Verify that our counter has incremented.
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expect(find.text('0'), findsNothing);
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expect(find.text('1'), findsOneWidget);
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test('only uppercase string', () {
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var length = 8;
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var generatedString = StringGenerators.getRandomString(length,
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hasLowercaseLetters: false, hasUppercaseLetters: true);
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expect(generatedString, isNot(matches(regExpNewLines)));
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expect(generatedString, isNot(matches(regExpWhiteSpaces)));
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expect(generatedString, isNot(matches(regExpNumbers)));
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expect(generatedString, isNot(matches(regExpLowercaseLetters)));
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expect(generatedString, isNot(matches(regExpSymbols)));
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expect(generatedString.length, equals(length));
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expect(generatedString, matches(regExpUppercaseLetters));
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});
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test('only numbers string', () {
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var length = 8;
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var generatedString = StringGenerators.getRandomString(length,
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hasLowercaseLetters: false,
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hasUppercaseLetters: false,
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hasNumbers: true);
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expect(generatedString, isNot(matches(regExpNewLines)));
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expect(generatedString, isNot(matches(regExpWhiteSpaces)));
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expect(generatedString, isNot(matches(regExpUppercaseLetters)));
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expect(generatedString, isNot(matches(regExpLowercaseLetters)));
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expect(generatedString, isNot(matches(regExpSymbols)));
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expect(generatedString.length, equals(length));
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expect(generatedString, matches(regExpNumbers));
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});
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test('only symbols string', () {
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var length = 8;
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var generatedString = StringGenerators.getRandomString(
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length,
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hasLowercaseLetters: false,
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hasUppercaseLetters: false,
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hasNumbers: false,
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hasSymbols: true,
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);
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expect(generatedString, isNot(matches(regExpNewLines)));
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expect(generatedString, isNot(matches(regExpWhiteSpaces)));
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expect(generatedString, isNot(matches(regExpUppercaseLetters)));
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expect(generatedString, isNot(matches(regExpLowercaseLetters)));
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expect(generatedString, isNot(matches(regExpNumbers)));
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expect(generatedString.length, equals(length));
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expect(generatedString, matches(regExpSymbols));
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});
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});
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group('Strict mode', () {
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test('All', () {
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var length = 5;
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var generatedString = StringGenerators.getRandomString(length,
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hasLowercaseLetters: true,
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hasUppercaseLetters: true,
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hasNumbers: true,
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hasSymbols: true,
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isStrict: true);
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expect(generatedString, isNot(matches(regExpNewLines)));
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expect(generatedString, isNot(matches(regExpWhiteSpaces)));
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expect(generatedString, matches(regExpLowercaseLetters));
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expect(generatedString, matches(regExpUppercaseLetters));
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expect(generatedString, matches(regExpNumbers));
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expect(generatedString, matches(regExpSymbols));
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expect(generatedString.length, equals(length));
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});
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test('Lowercase letters and numbers', () {
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var length = 3;
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var generatedString = StringGenerators.getRandomString(length,
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hasLowercaseLetters: true,
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hasUppercaseLetters: false,
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hasNumbers: true,
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hasSymbols: false,
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isStrict: true);
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expect(generatedString, isNot(matches(regExpNewLines)));
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expect(generatedString, isNot(matches(regExpWhiteSpaces)));
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expect(generatedString, isNot(matches(regExpUppercaseLetters)));
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expect(generatedString, isNot(matches(regExpSymbols)));
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expect(generatedString, matches(regExpLowercaseLetters));
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expect(generatedString, matches(regExpNumbers));
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expect(generatedString.length, equals(length));
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});
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});
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});
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}
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var regExpNewLines = RegExp(r"[\n\r]+");
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var regExpWhiteSpaces = RegExp(r"[\s]+");
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var regExpUppercaseLetters = RegExp(r"[A-Z]");
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var regExpLowercaseLetters = RegExp(r"[a-z]");
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var regExpNumbers = RegExp(r"[0-9]");
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var regExpSymbols = RegExp(r'(?:_|[^\w\s])+');
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