source: trip-planner-front/node_modules/@angular/platform-browser/esm2015/src/security/dom_sanitization_service.js@ 6a3a178

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { DOCUMENT } from '@angular/common';
import { forwardRef, Inject, Injectable, Injector, SecurityContext, ɵ_sanitizeHtml as _sanitizeHtml, ɵ_sanitizeUrl as _sanitizeUrl, ɵallowSanitizationBypassAndThrow as allowSanitizationBypassOrThrow, ɵbypassSanitizationTrustHtml as bypassSanitizationTrustHtml, ɵbypassSanitizationTrustResourceUrl as bypassSanitizationTrustResourceUrl, ɵbypassSanitizationTrustScript as bypassSanitizationTrustScript, ɵbypassSanitizationTrustStyle as bypassSanitizationTrustStyle, ɵbypassSanitizationTrustUrl as bypassSanitizationTrustUrl, ɵgetSanitizationBypassType as getSanitizationBypassType, ɵunwrapSafeValue as unwrapSafeValue } from '@angular/core';
import * as i0 from "@angular/core";
export { SecurityContext };
/**
 * DomSanitizer helps preventing Cross Site Scripting Security bugs (XSS) by sanitizing
 * values to be safe to use in the different DOM contexts.
 *
 * For example, when binding a URL in an `<a [href]="someValue">` hyperlink, `someValue` will be
 * sanitized so that an attacker cannot inject e.g. a `javascript:` URL that would execute code on
 * the website.
 *
 * In specific situations, it might be necessary to disable sanitization, for example if the
 * application genuinely needs to produce a `javascript:` style link with a dynamic value in it.
 * Users can bypass security by constructing a value with one of the `bypassSecurityTrust...`
 * methods, and then binding to that value from the template.
 *
 * These situations should be very rare, and extraordinary care must be taken to avoid creating a
 * Cross Site Scripting (XSS) security bug!
 *
 * When using `bypassSecurityTrust...`, make sure to call the method as early as possible and as
 * close as possible to the source of the value, to make it easy to verify no security bug is
 * created by its use.
 *
 * It is not required (and not recommended) to bypass security if the value is safe, e.g. a URL that
 * does not start with a suspicious protocol, or an HTML snippet that does not contain dangerous
 * code. The sanitizer leaves safe values intact.
 *
 * @security Calling any of the `bypassSecurityTrust...` APIs disables Angular's built-in
 * sanitization for the value passed in. Carefully check and audit all values and code paths going
 * into this call. Make sure any user data is appropriately escaped for this security context.
 * For more detail, see the [Security Guide](https://g.co/ng/security).
 *
 * @publicApi
 */
export class DomSanitizer {
}
DomSanitizer.ɵprov = i0.ɵɵdefineInjectable({ factory: function DomSanitizer_Factory() { return i0.ɵɵinject(DomSanitizerImpl); }, token: DomSanitizer, providedIn: "root" });
DomSanitizer.decorators = [
    { type: Injectable, args: [{ providedIn: 'root', useExisting: forwardRef(() => DomSanitizerImpl) },] }
];
export function domSanitizerImplFactory(injector) {
    return new DomSanitizerImpl(injector.get(DOCUMENT));
}
export class DomSanitizerImpl extends DomSanitizer {
    constructor(_doc) {
        super();
        this._doc = _doc;
    }
    sanitize(ctx, value) {
        if (value == null)
            return null;
        switch (ctx) {
            case SecurityContext.NONE:
                return value;
            case SecurityContext.HTML:
                if (allowSanitizationBypassOrThrow(value, "HTML" /* Html */)) {
                    return unwrapSafeValue(value);
                }
                return _sanitizeHtml(this._doc, String(value)).toString();
            case SecurityContext.STYLE:
                if (allowSanitizationBypassOrThrow(value, "Style" /* Style */)) {
                    return unwrapSafeValue(value);
                }
                return value;
            case SecurityContext.SCRIPT:
                if (allowSanitizationBypassOrThrow(value, "Script" /* Script */)) {
                    return unwrapSafeValue(value);
                }
                throw new Error('unsafe value used in a script context');
            case SecurityContext.URL:
                const type = getSanitizationBypassType(value);
                if (allowSanitizationBypassOrThrow(value, "URL" /* Url */)) {
                    return unwrapSafeValue(value);
                }
                return _sanitizeUrl(String(value));
            case SecurityContext.RESOURCE_URL:
                if (allowSanitizationBypassOrThrow(value, "ResourceURL" /* ResourceUrl */)) {
                    return unwrapSafeValue(value);
                }
                throw new Error('unsafe value used in a resource URL context (see https://g.co/ng/security#xss)');
            default:
                throw new Error(`Unexpected SecurityContext ${ctx} (see https://g.co/ng/security#xss)`);
        }
    }
    bypassSecurityTrustHtml(value) {
        return bypassSanitizationTrustHtml(value);
    }
    bypassSecurityTrustStyle(value) {
        return bypassSanitizationTrustStyle(value);
    }
    bypassSecurityTrustScript(value) {
        return bypassSanitizationTrustScript(value);
    }
    bypassSecurityTrustUrl(value) {
        return bypassSanitizationTrustUrl(value);
    }
    bypassSecurityTrustResourceUrl(value) {
        return bypassSanitizationTrustResourceUrl(value);
    }
}
DomSanitizerImpl.ɵprov = i0.ɵɵdefineInjectable({ factory: function DomSanitizerImpl_Factory() { return domSanitizerImplFactory(i0.ɵɵinject(i0.INJECTOR)); }, token: DomSanitizerImpl, providedIn: "root" });
DomSanitizerImpl.decorators = [
    { type: Injectable, args: [{ providedIn: 'root', useFactory: domSanitizerImplFactory, deps: [Injector] },] }
];
DomSanitizerImpl.ctorParameters = () => [
    { type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] }
];
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {forwardRef, Inject, Injectable, Injector, Sanitizer, SecurityContext, ɵ_sanitizeHtml as _sanitizeHtml, ɵ_sanitizeUrl as _sanitizeUrl, ɵallowSanitizationBypassAndThrow as allowSanitizationBypassOrThrow, ɵbypassSanitizationTrustHtml as bypassSanitizationTrustHtml, ɵbypassSanitizationTrustResourceUrl as bypassSanitizationTrustResourceUrl, ɵbypassSanitizationTrustScript as bypassSanitizationTrustScript, ɵbypassSanitizationTrustStyle as bypassSanitizationTrustStyle, ɵbypassSanitizationTrustUrl as bypassSanitizationTrustUrl, ɵBypassType as BypassType, ɵgetSanitizationBypassType as getSanitizationBypassType, ɵunwrapSafeValue as unwrapSafeValue} from '@angular/core';\n\nexport {SecurityContext};\n\n\n\n/**\n * Marker interface for a value that's safe to use in a particular context.\n *\n * @publicApi\n */\nexport interface SafeValue {}\n\n/**\n * Marker interface for a value that's safe to use as HTML.\n *\n * @publicApi\n */\nexport interface SafeHtml extends SafeValue {}\n\n/**\n * Marker interface for a value that's safe to use as style (CSS).\n *\n * @publicApi\n */\nexport interface SafeStyle extends SafeValue {}\n\n/**\n * Marker interface for a value that's safe to use as JavaScript.\n *\n * @publicApi\n */\nexport interface SafeScript extends SafeValue {}\n\n/**\n * Marker interface for a value that's safe to use as a URL linking to a document.\n *\n * @publicApi\n */\nexport interface SafeUrl extends SafeValue {}\n\n/**\n * Marker interface for a value that's safe to use as a URL to load executable code from.\n *\n * @publicApi\n */\nexport interface SafeResourceUrl extends SafeValue {}\n\n/**\n * DomSanitizer helps preventing Cross Site Scripting Security bugs (XSS) by sanitizing\n * values to be safe to use in the different DOM contexts.\n *\n * For example, when binding a URL in an `<a [href]=\"someValue\">` hyperlink, `someValue` will be\n * sanitized so that an attacker cannot inject e.g. a `javascript:` URL that would execute code on\n * the website.\n *\n * In specific situations, it might be necessary to disable sanitization, for example if the\n * application genuinely needs to produce a `javascript:` style link with a dynamic value in it.\n * Users can bypass security by constructing a value with one of the `bypassSecurityTrust...`\n * methods, and then binding to that value from the template.\n *\n * These situations should be very rare, and extraordinary care must be taken to avoid creating a\n * Cross Site Scripting (XSS) security bug!\n *\n * When using `bypassSecurityTrust...`, make sure to call the method as early as possible and as\n * close as possible to the source of the value, to make it easy to verify no security bug is\n * created by its use.\n *\n * It is not required (and not recommended) to bypass security if the value is safe, e.g. a URL that\n * does not start with a suspicious protocol, or an HTML snippet that does not contain dangerous\n * code. The sanitizer leaves safe values intact.\n *\n * @security Calling any of the `bypassSecurityTrust...` APIs disables Angular's built-in\n * sanitization for the value passed in. Carefully check and audit all values and code paths going\n * into this call. Make sure any user data is appropriately escaped for this security context.\n * For more detail, see the [Security Guide](https://g.co/ng/security).\n *\n * @publicApi\n */\n@Injectable({providedIn: 'root', useExisting: forwardRef(() => DomSanitizerImpl)})\nexport abstract class DomSanitizer implements Sanitizer {\n  /**\n   * Sanitizes a value for use in the given SecurityContext.\n   *\n   * If value is trusted for the context, this method will unwrap the contained safe value and use\n   * it directly. Otherwise, value will be sanitized to be safe in the given context, for example\n   * by replacing URLs that have an unsafe protocol part (such as `javascript:`). The implementation\n   * is responsible to make sure that the value can definitely be safely used in the given context.\n   */\n  abstract sanitize(context: SecurityContext, value: SafeValue|string|null): string|null;\n\n  /**\n   * Bypass security and trust the given value to be safe HTML. Only use this when the bound HTML\n   * is unsafe (e.g. contains `<script>` tags) and the code should be executed. The sanitizer will\n   * leave safe HTML intact, so in most situations this method should not be used.\n   *\n   * **WARNING:** calling this method with untrusted user data exposes your application to XSS\n   * security risks!\n   */\n  abstract bypassSecurityTrustHtml(value: string): SafeHtml;\n\n  /**\n   * Bypass security and trust the given value to be safe style value (CSS).\n   *\n   * **WARNING:** calling this method with untrusted user data exposes your application to XSS\n   * security risks!\n   */\n  abstract bypassSecurityTrustStyle(value: string): SafeStyle;\n\n  /**\n   * Bypass security and trust the given value to be safe JavaScript.\n   *\n   * **WARNING:** calling this method with untrusted user data exposes your application to XSS\n   * security risks!\n   */\n  abstract bypassSecurityTrustScript(value: string): SafeScript;\n\n  /**\n   * Bypass security and trust the given value to be a safe style URL, i.e. a value that can be used\n   * in hyperlinks or `<img src>`.\n   *\n   * **WARNING:** calling this method with untrusted user data exposes your application to XSS\n   * security risks!\n   */\n  abstract bypassSecurityTrustUrl(value: string): SafeUrl;\n\n  /**\n   * Bypass security and trust the given value to be a safe resource URL, i.e. a location that may\n   * be used to load executable code from, like `<script src>`, or `<iframe src>`.\n   *\n   * **WARNING:** calling this method with untrusted user data exposes your application to XSS\n   * security risks!\n   */\n  abstract bypassSecurityTrustResourceUrl(value: string): SafeResourceUrl;\n}\n\nexport function domSanitizerImplFactory(injector: Injector) {\n  return new DomSanitizerImpl(injector.get(DOCUMENT));\n}\n\n@Injectable({providedIn: 'root', useFactory: domSanitizerImplFactory, deps: [Injector]})\nexport class DomSanitizerImpl extends DomSanitizer {\n  constructor(@Inject(DOCUMENT) private _doc: any) {\n    super();\n  }\n\n  override sanitize(ctx: SecurityContext, value: SafeValue|string|null): string|null {\n    if (value == null) return null;\n    switch (ctx) {\n      case SecurityContext.NONE:\n        return value as string;\n      case SecurityContext.HTML:\n        if (allowSanitizationBypassOrThrow(value, BypassType.Html)) {\n          return unwrapSafeValue(value);\n        }\n        return _sanitizeHtml(this._doc, String(value)).toString();\n      case SecurityContext.STYLE:\n        if (allowSanitizationBypassOrThrow(value, BypassType.Style)) {\n          return unwrapSafeValue(value);\n        }\n        return value as string;\n      case SecurityContext.SCRIPT:\n        if (allowSanitizationBypassOrThrow(value, BypassType.Script)) {\n          return unwrapSafeValue(value);\n        }\n        throw new Error('unsafe value used in a script context');\n      case SecurityContext.URL:\n        const type = getSanitizationBypassType(value);\n        if (allowSanitizationBypassOrThrow(value, BypassType.Url)) {\n          return unwrapSafeValue(value);\n        }\n        return _sanitizeUrl(String(value));\n      case SecurityContext.RESOURCE_URL:\n        if (allowSanitizationBypassOrThrow(value, BypassType.ResourceUrl)) {\n          return unwrapSafeValue(value);\n        }\n        throw new Error(\n            'unsafe value used in a resource URL context (see https://g.co/ng/security#xss)');\n      default:\n        throw new Error(`Unexpected SecurityContext ${ctx} (see https://g.co/ng/security#xss)`);\n    }\n  }\n\n  override bypassSecurityTrustHtml(value: string): SafeHtml {\n    return bypassSanitizationTrustHtml(value);\n  }\n  override bypassSecurityTrustStyle(value: string): SafeStyle {\n    return bypassSanitizationTrustStyle(value);\n  }\n  override bypassSecurityTrustScript(value: string): SafeScript {\n    return bypassSanitizationTrustScript(value);\n  }\n  override bypassSecurityTrustUrl(value: string): SafeUrl {\n    return bypassSanitizationTrustUrl(value);\n  }\n  override bypassSecurityTrustResourceUrl(value: string): SafeResourceUrl {\n    return bypassSanitizationTrustResourceUrl(value);\n  }\n}\n"]}