DevSec: JWT & Crypto Toolkit

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ืžื™ื“ืข ืขืœ ื”ืืคืœื™ืงืฆื™ื” ื”ื–ื•

DevSec Toolkit ื”ื•ื ื›ืœื™ ืคื™ืชื•ื— ืœื ืžืงื•ื•ืŸ ืฉืชื•ื›ื ืŸ ืขื‘ื•ืจ ืžื”ื ื“ืกื™ ืื‘ื˜ื—ื”, ืืจื›ื™ื˜ืงื˜ื™ backend ื•ืžืคืชื—ื™ ืชื•ื›ื ื”. ื‘ื“ื•ืง ื˜ื•ืงื ื™ื ืฉืœ ืื™ืžื•ืช, ื—ืฉื‘ ืชืงืฆื™ืจ ืงืจื™ืคื˜ื•ื’ืจืคื™ ื•ืคืขื ื— ืคื•ืจืžื˜ื™ื ืฉืœ ื ืชื•ื ื™ื ื™ืฉื™ืจื•ืช ื‘ืžื›ืฉื™ืจ ื”ืื ื“ืจื•ืื™ื“ ืฉืœืš ืœืœื ื˜ืœืžื˜ืจื™ื” ืื• ื“ืœื™ืคืช ื ืชื•ื ื™ื.

ื›ืœ ื˜ืจื ืกืคื•ืจืžืฆื™ื”, ืฉื’ืจืช ื’ื™ื‘ื•ื‘ ื•ืฉืœื‘ ืคืขื ื•ื— ืคื•ืขืœื™ื ื‘ืฆื“ ื”ืœืงื•ื—. ื”ื˜ื•ืงื ื™ื ื”ืจื’ื™ืฉื™ื ื•ืกื•ื“ื•ืช ื”ืงืจื™ืคื˜ื•ื’ืจืคื™ื™ื ืฉืœืš ืœืขื•ืœื ืœื ืขื•ื–ื‘ื™ื ืืช ืžืื’ืจ ื”ื–ื™ื›ืจื•ืŸ ืฉืœืš.

ื›ืœื™ ืฉื™ืจื•ืช ืžืคืชื— ืžืจื›ื–ื™ื™ื:

1. ื‘ื•ื“ืง JWT ื•ืžืคืขื ื— ื˜ื•ืงื ื™ื
โ€ข ื‘ื“ื™ืงืช JWT (Web Token) ืžื™ื™ื“ื™ืช: ืคืขื ื•ื— ื›ื•ืชืจื•ืช, ืชื‘ื™ืขื•ืช ื•ื’ื•ืคื™ ืžื˜ืขืŸ.

โ€ข ืชืฆื•ื’ืช JSON ืžืขื•ืฆื‘ืช ืขื ื”ื“ื’ืฉืช ืชื—ื‘ื™ืจ.

โ€ข ื”ืžืจืช epoch ืื•ื˜ื•ืžื˜ื™ืช ืฉืœ UNIX ืขื‘ื•ืจ ื—ื•ืชืžื•ืช ื–ืžืŸ ืฉืœ issued-at (iat), expiry (exp) ื•-not-before (nbf) ืขื ืกื˜ื˜ื•ืก ืชื•ืงืฃ ื˜ื•ืงื ื™ื ื—ื™.

2. ืžืคืขื ื— ื—ื›ื ืจื‘-ืคื•ืจืžื˜ื™ื
โ€ข ื–ื™ื”ื•ื™ ืื•ื˜ื•ืžื˜ื™ ื•ื ื™ืชื•ื— ืฉืœ ื˜ืขื•ื ื™ ื ืชื•ื ื™ื ืฉืจื™ืจื•ืชื™ื™ื ื‘ืื•ืคืŸ ืžื™ื™ื“ื™.
โ€ข ื”ืžืจื•ืช ื“ื•-ื›ื™ื•ื•ื ื™ื•ืช: Base64, Base64URL, ื”ืงืกื“ืฆื™ืžืœื™ (Base16), ืงื™ื“ื•ื“ ืื—ื•ื–ื™ URL ื•ื™ืฉื•ื™ื•ืช HTML.
โ€ข ื–ืจื™ืžื•ืช ืขื‘ื•ื“ื” ื ืงื™ื•ืช ืœื”ืขืชืงื” ื•ื‘ื“ื™ืงื” ื‘ื ื’ื™ืขื” ืื—ืช ืขื‘ื•ืจ ืื‘ื—ื•ืŸ ืžืคืชื—ื™ื.

3. ืžื—ืฉื‘ื•ืŸ ื’ื™ื‘ื•ื‘ ืงืจื™ืคื˜ื•ื’ืจืคื™
โ€ข ื—ืฉื‘ ืขื™ื›ื•ืœื™ ื’ื™ื‘ื•ื‘ ื—ื“-ื›ื™ื•ื•ื ื™ื™ื ื‘ืžืฆื‘ ืœื ืžืงื•ื•ืŸ.

โ€ข ืืœื’ื•ืจื™ืชืžื™ื ื ืชืžื›ื™ื: MD5, SHA-1, SHA-224, SHA-256, SHA-384 ื•-SHA-512.

โ€ข ื™ืฆื™ืจืช HMAC: ื—ืฉื‘ ืงื•ื“ื™ ืื™ืžื•ืช ื”ื•ื“ืขื•ืช ื’ื™ื‘ื•ื‘ ืขื ืžืคืชื— (HMAC-SHA256, HMAC-SHA512) ืœืื™ืžื•ืช webhook ื•ืื™ืžื•ืช ื—ืชื™ืžืช API.

4. ืžื—ื•ืœืœ ืžื–ื”ื™ื ื•ืกื•ื“ื•ืช ืงืจื™ืคื˜ื•ื’ืจืคื™ื™ื
โ€ข ืฆื•ืจ ืžื–ื”ื™ UUID v4 ืžืื•ื‘ื˜ื—ื™ื ืงืจื™ืคื˜ื•ื’ืจืคื™ืช.

โ€ข ื™ืฆื™ืจืช NanoID ื‘ืขืœ ืื ื˜ืจื•ืคื™ื” ื’ื‘ื•ื”ื” ื•ืกื•ื“ื•ืช ืืœืคืื ื•ืžืจื™ื™ื ืžื•ืชืืžื™ื ืื™ืฉื™ืช.
โ€ข ืื‘ื˜ื—ืช ื‘ืชื™ื ื”ืงืกื“ืฆื™ืžืœื™ื™ื ืืงืจืื™ื™ื ืขื‘ื•ืจ ืžืคืชื—ื•ืช ื”ืคืขืœื”, ืžืœื—ื™ื ื•ืžืฉืชื ื™ ืกื‘ื™ื‘ื”.

โ€ข ืžืขื‘ืจ ืžืชื’ืžืœ: ืฆืคื” ื‘ืคืจืกื•ืžืช ืงืฆืจื” ื›ื“ื™ ืœืคืชื•ื— ื™ืฆื™ืจืช ืงื‘ื•ืฆื•ืช ื‘ื›ืžื•ืช ื’ื“ื•ืœื” ืœืœื ื”ื’ื‘ืœื” ืœืžืฉืš 30 ื“ืงื•ืช ื•ื™ืฆื•ื ืจื‘-ืคื•ืจืžื˜ื™ื.

5. ืชืขื•ื“ืช X.509 ื•ื‘ื•ื“ืง ืžืคืชื—ื•ืช

โ€ข ื‘ื“ื™ืงืช ืชืขื•ื“ื•ืช ืžืคืชื— ืฆื™ื‘ื•ืจื™ X.509 ืžืงื•ื“ื“ื•ืช PEM ื•ืงื‘ืฆื™ SubjectPublicKeyInfo (SPKI).

โ€ข ื ื™ืชื•ื— ืฉืžื•ืช ื™ื™ื—ื•ื“ื™ื™ื ืฉืœ ื ื•ืฉืื™ื (DN), ืžื ืคื™ืงื™ื, ื˜ื•ื•ื—ื™ ืชื•ืงืฃ ื•ืžืกืคืจื™ื ืกื™ื“ื•ืจื™ื™ื.

โ€ข ื–ื™ื”ื•ื™ ืื•ืจื›ื™ ืกื™ื‘ื™ื•ืช ืฉืœ ืžื•ื“ื•ืœ RSA/ืืงืกืคื•ื ื ื˜ ื•ืขืงื•ืžื•ืช ื‘ืขืœื•ืช ืฉื ืฉืœ ืขืงื•ืžื” ืืœื™ืคื˜ื™ืช (EC) ื‘ืžืฆื‘ ืœื ืžืงื•ื•ืŸ.

6. ื ื™ืงื•ื™ ืœื•ื—ื•ืช

โ€ข ื˜ื™ื™ืžืจ ืžื—ื™ืงื” ืื•ื˜ื•ืžื˜ื™ืช ืฉืœ ืœื•ื—ื•ืช ื”ืœื•ื— ื”ื ื™ืชืŸ ืœื”ื’ื“ืจื”: ืžื•ื—ืงืช ืื•ื˜ื•ืžื˜ื™ืช ืืกื™ืžื•ื ื™ื, ืžืคืชื—ื•ืช ื•ืื™ืฉื•ืจื™ื ืจื’ื™ืฉื™ื ืฉื”ื•ืขืชืงื• ืžืœื•ื— ื”ืœื•ื— ืฉืœ ื”ืžื›ืฉื™ืจ ืฉืœืš ืœืื—ืจ 60 ืฉื ื™ื•ืช.

ืชื•ื›ื ืŸ ืขื‘ื•ืจ ืžืคืชื—ื™ื ืžื•ื“ืจื ื™ื™ื:
ืขืจื›ืช ื”ื›ืœื™ื DevSec ื ื•ืขื“ื” ืœื”ื™ื•ืช ืงืœืช ืžืฉืงืœ, ืจืกืคื•ื ืกื™ื‘ื™ืช ื•ืœืœื ื”ืกื—ื•ืช ื“ืขืช. ื‘ื™ืŸ ืื ืืชื ืžื ืงื™ื ื ื™ืคื•ื™ ื‘ืื’ื™ื ื‘ืžื™ืงืจื•-ืฉื™ืจื•ืชื™ื, ืžืืžืชื™ื ืขื•ืžืกื™ ืื™ืžื•ืช ืื• ืžื˜ืคืœื™ื ื‘ืžืฉื™ืžื•ืช ืฉื™ืœื•ื‘ ืžืขืจื›ื•ืช, DevSec ืžืกืคืง ืืช ืขืจื›ืช ื”ื›ืœื™ื ื”ืงืจื™ืคื˜ื•ื’ืจืคื™ืช ื”ืœื™ื‘ื” ื™ืฉื™ืจื•ืช ืœื›ื™ืก ืฉืœื›ื.

ืคื•ืชื— ืขืœ ื™ื“ื™ LKPixel.
ืชืžื™ื›ื” ื•ืžืฉื•ื‘: contact@lkpixel.com
ื‘ื•ื“ืง JWT ืœื ืžืงื•ื•ืŸ, ื’ื™ื‘ื•ื‘ื™ ืงืจื™ืคื˜ื•, ืžืคืขื ื— base64 ื—ื›ื ื•ืžื—ื•ืœืœ ื–ื™ื”ื•ื™ ืžืื•ื‘ื˜ื—
ืขื“ื›ื•ืŸ ืื—ืจื•ืŸ ื‘ืชืืจื™ืš
22 ื‘ืกืคื˜ืณ 2026
ืกื™ืคื•ืจื™ื ืžื•ืžืœืฆื™ื

ืื‘ื˜ื—ืช ื ืชื•ื ื™ื

ื›ื“ื™ ืœืฉืžื•ืจ ืขืœ ื”ื‘ื˜ื™ื—ื•ืช ืฆืจื™ืš ืงื•ื“ื ื›ืœ ืœื”ื‘ื™ืŸ ืื™ืš ื”ืžืคืชื—ื™ื ืื•ืกืคื™ื ื•ืžืฉืชืคื™ื ืืช ื”ื ืชื•ื ื™ื ืฉืœืš. ื ื•ื”ืœื™ ืคืจื˜ื™ื•ืช ื”ื ืชื•ื ื™ื ื•ืื‘ื˜ื—ืช ื”ื ืชื•ื ื™ื ืขืฉื•ื™ื™ื ืœื”ืฉืชื ื•ืช ื‘ื”ืชืื ืœืฉื™ืžื•ืฉ, ืœืื–ื•ืจ ื•ืœื’ื™ืœ ื”ืžืฉืชืžืฉ. ื”ืžืคืชื— ืกื™ืคืง ืืช ื”ืžื™ื“ืข ื”ื–ื” ื•ื”ื•ื ืขืฉื•ื™ ืœืขื“ื›ืŸ ืื•ืชื• ืžื“ื™ ืคืขื.

ืžื” ื—ื“ืฉ?

Initial Release (v1.0.0):
โ€ข Offline JWT Inspector with real-time expiration validation and timestamp formatting.
โ€ข Smart Decoder supporting Base64, Hex, URL, and HTML entity encoding.
โ€ข Cryptographic Hashes (MD5, SHA-256, SHA-512) and HMAC calculation.
โ€ข Cryptographically secure UUID v4, NanoID, and Hex token generator.
โ€ข 30-minute Bulk Export Pass via rewarded access.
โ€ข X.509 Certificate and Public Key (RSA/EC) inspector.
โ€ข Auto-Wipe clipboard privacy protection.

ืชืžื™ื›ื” ื‘ืืคืœื™ืงืฆื™ื”

ืžื™ื“ืข ืขืœ ืžืคืชื—ื™ ื”ืืคืœื™ืงืฆื™ื”
R.M. Dulanka Sheshan Rathnayaka
lkpixel.developer@gmail.com
647, Magulagama Padeniya Wariyapola 60461 Sri Lanka

โ€ซืขื•ื“ ืžื‘ื™ืช LKPixelโ€Žโ€