Matthieu MALVACHEandMatthieu MALVACHE
5d273e2109
This release significantly expands internationalization support and adds comprehensive identity management features. Internationalization (i18n): - Add 5 new languages: Spanish, Italian, German, Dutch, Portuguese - Expand from 3 to 8 total supported languages - Redesign language switcher for better scalability (dropdown UI) - Complete translations for all features across all languages Identity Management: - Multiple sender identities with per-identity signatures - Sub-addressing support (user+tag@domain.com) - Context-aware tag suggestions for sub-addresses - Identity badges in email viewer and list - Full CRUD operations for managing identities Newsletter Management: - RFC 2369 List-Unsubscribe support (one-click unsubscribe) - HTTP and mailto unsubscribe methods - Security validation prevents XSS attacks - Two-step confirmation with persistent dismissal Security & Accessibility: - Dark mode email readability (intelligent color transformation) - WCAG 2.0 Level AA color contrast compliance - Comprehensive XSS prevention with validation utilities - Unit test coverage for security-critical code (57 validation tests) Testing: - Add unit tests for validation utilities - Add unit tests for email sanitization - Add unit tests for color transformation - Full test coverage for XSS attack vectors
78 lines
2.4 KiB
TypeScript
78 lines
2.4 KiB
TypeScript
import DOMPurify from 'dompurify';
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/**
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* Unified DOMPurify configuration for email content
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* Blocks all script execution vectors while preserving formatting
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* NOTE: <style> tags are forbidden to prevent global CSS injection
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* Inline style attributes are still allowed for element-specific styling
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*/
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export const EMAIL_SANITIZE_CONFIG = {
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ADD_TAGS: [],
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ADD_ATTR: ['target', 'style', 'class', 'width', 'height', 'align', 'valign', 'bgcolor', 'color'],
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ALLOW_DATA_ATTR: false,
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FORCE_BODY: true,
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FORBID_TAGS: [
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'script', 'iframe', 'object', 'embed', 'form',
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'input', 'button', 'meta', 'link', 'base',
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'svg', 'math', 'style'
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],
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FORBID_ATTR: [
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'onerror', 'onload', 'onclick', 'onmouseover',
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'onfocus', 'onblur', 'onchange', 'onsubmit',
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'onkeydown', 'onkeyup', 'onmousedown', 'onmouseup'
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],
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};
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/**
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* Sanitize email HTML content
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* @param html - Raw HTML content from email
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* @returns Sanitized HTML safe for rendering
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*/
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export function sanitizeEmailHtml(html: string): string {
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return DOMPurify.sanitize(html, EMAIL_SANITIZE_CONFIG);
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}
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/**
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* Sanitize HTML signature with stricter rules
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* Only allows basic formatting, no external resources
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*/
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export const SIGNATURE_SANITIZE_CONFIG = {
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ALLOWED_TAGS: ['p', 'br', 'b', 'strong', 'i', 'em', 'u', 'a', 'span', 'div'],
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ALLOWED_ATTR: ['href', 'style', 'class'],
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ALLOW_DATA_ATTR: false,
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FORBID_TAGS: ['script', 'iframe', 'object', 'embed', 'img', 'video', 'audio'],
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FORBID_ATTR: ['onerror', 'onload', 'onclick', 'onmouseover'],
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};
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/**
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* Sanitize HTML signature for storage and display
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* @param html - User-provided HTML signature
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* @returns Sanitized signature (no scripts, no external resources)
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*/
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export function sanitizeSignatureHtml(html: string): string {
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if (!html?.trim()) return '';
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return DOMPurify.sanitize(html, SIGNATURE_SANITIZE_CONFIG);
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}
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/**
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* Safe HTML parsing without execution
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* Use instead of innerHTML for detection/parsing
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*/
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export function parseHtmlSafely(html: string): Document {
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const parser = new DOMParser();
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return parser.parseFromString(html, 'text/html');
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}
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/**
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* Detect if HTML content has rich formatting
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* Safe alternative to innerHTML parsing
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*/
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export function hasRichFormatting(html: string): boolean {
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const doc = parseHtmlSafely(html);
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return !!doc.querySelector(
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'table, img, style, b, strong, i, em, u, font, ' +
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'div[style], span[style], p[style], ' +
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'h1, h2, h3, h4, h5, h6, ul, ol, blockquote'
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);
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}
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