90 lines
2.8 KiB
JavaScript
90 lines
2.8 KiB
JavaScript
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import merge from './util/merge';
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import assertString from './util/assertString';
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var upperCaseRegex = /^[A-Z]$/;
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var lowerCaseRegex = /^[a-z]$/;
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var numberRegex = /^[0-9]$/;
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var symbolRegex = /^[-#!$@£%^&*()_+|~=`{}\[\]:";'<>?,.\/\\ ]$/;
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var defaultOptions = {
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minLength: 8,
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minLowercase: 1,
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minUppercase: 1,
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minNumbers: 1,
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minSymbols: 1,
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returnScore: false,
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pointsPerUnique: 1,
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pointsPerRepeat: 0.5,
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pointsForContainingLower: 10,
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pointsForContainingUpper: 10,
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pointsForContainingNumber: 10,
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pointsForContainingSymbol: 10
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};
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/* Counts number of occurrences of each char in a string
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* could be moved to util/ ?
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*/
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function countChars(str) {
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var result = {};
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Array.from(str).forEach(function (_char) {
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var curVal = result[_char];
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if (curVal) {
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result[_char] += 1;
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} else {
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result[_char] = 1;
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}
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});
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return result;
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}
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/* Return information about a password */
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function analyzePassword(password) {
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var charMap = countChars(password);
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var analysis = {
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length: password.length,
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uniqueChars: Object.keys(charMap).length,
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uppercaseCount: 0,
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lowercaseCount: 0,
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numberCount: 0,
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symbolCount: 0
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};
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Object.keys(charMap).forEach(function (_char2) {
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/* istanbul ignore else */
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if (upperCaseRegex.test(_char2)) {
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analysis.uppercaseCount += charMap[_char2];
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} else if (lowerCaseRegex.test(_char2)) {
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analysis.lowercaseCount += charMap[_char2];
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} else if (numberRegex.test(_char2)) {
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analysis.numberCount += charMap[_char2];
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} else if (symbolRegex.test(_char2)) {
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analysis.symbolCount += charMap[_char2];
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}
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});
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return analysis;
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}
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function scorePassword(analysis, scoringOptions) {
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var points = 0;
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points += analysis.uniqueChars * scoringOptions.pointsPerUnique;
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points += (analysis.length - analysis.uniqueChars) * scoringOptions.pointsPerRepeat;
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if (analysis.lowercaseCount > 0) {
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points += scoringOptions.pointsForContainingLower;
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}
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if (analysis.uppercaseCount > 0) {
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points += scoringOptions.pointsForContainingUpper;
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}
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if (analysis.numberCount > 0) {
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points += scoringOptions.pointsForContainingNumber;
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}
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if (analysis.symbolCount > 0) {
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points += scoringOptions.pointsForContainingSymbol;
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}
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return points;
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}
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export default function isStrongPassword(str) {
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var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : null;
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assertString(str);
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var analysis = analyzePassword(str);
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options = merge(options || {}, defaultOptions);
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if (options.returnScore) {
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return scorePassword(analysis, options);
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}
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return analysis.length >= options.minLength && analysis.lowercaseCount >= options.minLowercase && analysis.uppercaseCount >= options.minUppercase && analysis.numberCount >= options.minNumbers && analysis.symbolCount >= options.minSymbols;
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}
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