59 lines
2.5 KiB
JavaScript
59 lines
2.5 KiB
JavaScript
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'use strict';
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var assert = require('assert');
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var constants = require('./constants');
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var util = require('util');
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var bufferUtil = require('./buffer-utils');
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module.exports = {
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validateString: function (value, name) {
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assert(typeof value === 'string' || (value instanceof String), util.format('%s should be a string', name));
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assert(value.length !== 0, util.format('%s should not be empty', name));
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},
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validateHex: function (value, name) {
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module.exports.validateString(value, name);
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assert(/^[0-9A-F]+$/i.test(value), util.format('%s does not represent a valid hex', name));
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assert(value.length % 2 === 0, 'Hex string must contain even number of characters');
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},
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validateASCII: function (value, name) {
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var buffer = bufferUtil.create(value, 'utf8');
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assert(value.length === buffer.length, util.format('%s should contain only ASCII characters', name));
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},
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validateObject: function (value, name) {
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var isObject = value && typeof value === 'object' && !Array.isArray(value);
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assert(isObject, util.format('%s should be an object', name));
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},
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validateBufferLength: function (buffer, fieldDisplayName, start, length) {
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assert(buffer.length >= start + length,
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util.format('Cannot read/write to field %s starting at byte %d with length %d byte(s). Passport length is %d byte(s).',
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fieldDisplayName, start, length, buffer.length));
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},
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validatePreviousComponent: function (value) {
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var descriptor = require('./field-descriptors').fields.PREVIOUS_COMPONENT;
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var name = descriptor.name;
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module.exports.validateString(value, name);
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module.exports.validateASCII(value, name);
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var maxLength = descriptor.length;
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assert(value.length <= maxLength, util.format('%s should be not more than %d characters', name, maxLength));
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},
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validateConnectionID: function (value) {
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var name = require('./field-descriptors').fields.CONNECTION_ID.name;
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module.exports.validateHex(value, name);
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assert(value.length === 32, util.format('%s should contain 32 hexadecimal characters (16 bytes)', name));
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},
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validateConnectionCounter: function (value) {
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var name = require('./field-descriptors').fields.CONNECTION_COUNTER.name;
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assert(typeof value === 'number' || (value instanceof Number), util.format('%s should be a number', name));
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assert(value % 1 === 0, util.format('%s should be an integer', name));
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assert(value <= constants.UINT_32_MAX, util.format('%s should not be greater than a 4-byte integer', name));
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}
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};
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