[TASK-7765] fix: validate file inputs before upload#604
[TASK-7765] fix: validate file inputs before upload#604kushagrasarathe merged 2 commits intodevelopfrom
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WalkthroughThis pull request enhances file upload functionality and error handling across multiple components. It introduces a new error handling function, Changes
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Actionable comments posted: 1
🧹 Nitpick comments (7)
src/components/Global/FileUploadInput/index.tsx (2)
34-38: Improve file signature validation accuracyCurrently, the implementation reads only the first 4 bytes of the file to determine its signature. Some file types may require more bytes for accurate identification. For example, PDF files often need at least 5 bytes (
%PDF-) to confirm the file type. Consider reading more bytes (e.g., the first 8 bytes) to enhance validation accuracy and reduce false positives or negatives.Apply this diff to read more bytes:
- const arr = new Uint8Array(e.target.result as ArrayBuffer).subarray(0, 4) + const arr = new Uint8Array(e.target.result as ArrayBuffer).subarray(0, 8)
95-97: Sanitize error messages before displaying to usersWhen calling the
onErrorcallback, consider sanitizing error messages to avoid exposing sensitive information. Providing generic error messages can enhance security and provide a better user experience.Apply this diff to generalize the error message:
- onError(error instanceof Error ? error.message : 'Upload failed') + onError('File upload failed due to validation error.')src/constants/general.consts.ts (2)
174-182: Review and limit allowed MIME types carefullyEnsure that the
FILE_UPLOAD_ALLOWED_MIME_TYPESset includes only the necessary and safe MIME types. Allowing too many MIME types can increase the attack surface. Regularly review this list and consider potential security implications before adding new types.
186-199: Maintain and update valid file signaturesThe
VALID_FILE_SIGNATURESobject is crucial for file validation. Ensure that all file signatures are accurate and up-to-date. For file types like JPEG, which have multiple valid signatures, include all necessary variations. Adding comments or references can help maintain clarity.src/components/Request/Create/Views/Initial.view.tsx (2)
1-1: Remove unused import to clean up the codeThe
getTokenDetailsimport at line 1 appears to be unused in this file. Removing it can help reduce clutter and potential confusion.Apply this diff to remove the unused import:
- import { getTokenDetails } from '@/components/Create/Create.utils'
132-137: Reset error state when errors are resolvedThe
handleFileUploadErrorfunction sets theerrorState, but there is no logic to clear the error when the issue is resolved. Consider resetting theerrorStatewhen the user addresses the error to enhance user experience.You can add logic to reset the error state when necessary.
src/utils/general.utils.ts (1)
1024-1039: LGTM! Well-implemented file signature validation.The function effectively validates file headers against known signatures for PNG, JPEG, and PDF formats. The implementation is clean and well-documented.
Consider making the function more extensible by:
- Using a map to iterate over valid signatures instead of hard-coding checks.
- Adding support for more file types in the future.
Example refactor:
export const isValidFileSignature = (header: string): boolean => { - return ( - // PNG - header === consts.VALID_FILE_SIGNATURES.PNG || - // JPEG (any variant) - consts.VALID_FILE_SIGNATURES.JPEG.includes(header as 'ffd8ffe0' | 'ffd8ffe1' | 'ffd8ffe2') || - // PDF - header === consts.VALID_FILE_SIGNATURES.PDF - ) + // Check single-signature formats + if (Object.values(consts.VALID_FILE_SIGNATURES).some(sig => + !Array.isArray(sig) && header === sig + )) { + return true; + } + + // Check multi-signature formats + return Object.values(consts.VALID_FILE_SIGNATURES).some(sig => + Array.isArray(sig) && sig.includes(header) + ); }
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📒 Files selected for processing (5)
src/components/Create/Link/Input.view.tsx(3 hunks)src/components/Global/FileUploadInput/index.tsx(3 hunks)src/components/Request/Create/Views/Initial.view.tsx(3 hunks)src/constants/general.consts.ts(3 hunks)src/utils/general.utils.ts(2 hunks)
🔇 Additional comments (4)
src/components/Global/FileUploadInput/index.tsx (1)
70-72: Be cautious with MIME type fromfile.typeThe MIME type provided by
file.typecan be manipulated by a malicious user. While you perform additional validation using file signatures, relying solely onfile.typefor security checks might not be sufficient. Ensure that server-side validations are also in place to prevent any security risks associated with spoofed MIME types.src/components/Request/Create/Views/Initial.view.tsx (1)
191-195: Confirm all necessary props are passed toFileUploadInputThe
FileUploadInputcomponent now receives theonErrorprop for improved error handling. Ensure that this prop is correctly utilized within the component to handle errors as expected.src/components/Create/Link/Input.view.tsx (2)
245-250: LGTM! Well-implemented error handling.The error handling function is properly typed and follows React's state management best practices.
324-324: LGTM! Good error handling enhancement.The
onErrorprop properly connects the error handler to theFileUploadInputcomponent, improving error reporting capabilities.
| <img | ||
| src={attachmentOptions.fileUrl} | ||
| alt="" | ||
| className="h-8 w-8" | ||
| // prevent XSS via SVG | ||
| crossOrigin="anonymous" | ||
| /> |
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Prevent potential XSS attacks from user-uploaded images
Rendering user-uploaded images directly, especially SVG files, can lead to XSS vulnerabilities. SVG files can contain embedded scripts that may be executed in the browser. Even with crossOrigin="anonymous", this risk remains. Consider sanitizing SVG files before rendering or disallowing SVG uploads altogether.
Modify the code to exclude SVG files or handle them securely:
+ // Exclude SVG files to prevent potential XSS attacks
+ if (fileType === 'image/svg+xml') {
+ // Do not render the SVG image directly
+ // Optionally, show a placeholder or an alert
+ } else if (utils.checkifImageType(fileType)) {
<img
src={attachmentOptions.fileUrl}
alt=""
className="h-8 w-8"
crossOrigin="anonymous"
/>
+ }Committable suggestion skipped: line range outside the PR's diff.
kushagrasarathe
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Actionable comments posted: 0
🧹 Nitpick comments (1)
src/utils/general.utils.ts (1)
1031-1040: Consider enhancing the robustness of file signature validation.While the current implementation is good, consider these improvements:
- Add input validation for malformed headers
- Add comments explaining the magic numbers (file signatures)
- Simplify the JPEG validation using an array method
export const isValidFileSignature = (header: string): boolean => { + // Validate input + if (!header || typeof header !== 'string') { + return false; + } + return ( // PNG (starts with 89 50 4E 47) header === consts.VALID_FILE_SIGNATURES.PNG || // JPEG (starts with FF D8 FF Ex where x can be E0, E1, E2) - consts.VALID_FILE_SIGNATURES.JPEG.includes(header as 'ffd8ffe0' | 'ffd8ffe1' | 'ffd8ffe2') || + consts.VALID_FILE_SIGNATURES.JPEG.some(sig => sig === header) || // PDF (starts with 25 50 44 46) header === consts.VALID_FILE_SIGNATURES.PDF ) }
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📒 Files selected for processing (2)
src/components/Create/Link/Input.view.tsx(2 hunks)src/utils/general.utils.ts(2 hunks)
🚧 Files skipped from review as they are similar to previous changes (1)
- src/components/Create/Link/Input.view.tsx
🔇 Additional comments (3)
src/utils/general.utils.ts (3)
1024-1040: LGTM! Well-structured file signature validation.The implementation aligns well with the PR objectives for enhancing file upload security. The function is well-documented and handles multiple file formats correctly.
6-7: Consider specifying the version for the 'siwe' package.While the imports are correctly used, it's recommended to specify the version of the 'siwe' package in package.json to ensure consistent behavior across different environments.
1034-1038: Verify the VALID_FILE_SIGNATURES constant structure.Let's ensure that the required constants exist and have the correct structure.
✅ Verification successful
✓ VALID_FILE_SIGNATURES constant structure verified
The constant is properly defined in
src/constants/general.consts.tswith the correct structure for PNG, JPEG variants, and PDF signatures. The usage in the code matches the constant's structure perfectly.🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Check if VALID_FILE_SIGNATURES constant exists with correct structure ast-grep --pattern 'export const VALID_FILE_SIGNATURES = { $$$ PNG: $_, JPEG: $_, PDF: $_, $$$ }'Length of output: 109
Script:
#!/bin/bash # Search for VALID_FILE_SIGNATURES constant definition rg "VALID_FILE_SIGNATURES" -A 10 # Backup search using ast-grep with simpler pattern ast-grep --pattern 'const VALID_FILE_SIGNATURES = $_'Length of output: 1628
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Summary by CodeRabbit
New Features
Bug Fixes
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