feat(cipher): add Snefru hash function (Merkle, 1990, S-box-based compression, direct historical link before the Tiger/MD lineage)

[Aakif-Kohari]

Pull Request

Description

Adds a complete, step-instrumented visualizer for Snefru, Ralph Merkle's 1990 hash design. This implementation uses 4 large generated S-boxes and exposes configurable passes and output length, mirroring the configuration pattern established by HAVAL.

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Related Issue

Closes #985

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Type of Change

• Bug Fix
• New Feature
• Documentation
• UI/UX Improvement
• Refactoring
• Performance Improvement
• Accessibility

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Changes Made

• Created lib/cipher/hash/snefru.ts with generated 256x32-bit S-boxes and configurable compression
• Created tests/unit/hash/snefru.test.ts verifying multi-configuration support
• Added snefru to CipherName union in lib/cipher/types.ts
• Registered snefru in lib/cipher/registry.ts with configurable options
• Added lazy-import dispatch case in lib/workers/cipher.worker.ts

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Testing

• Tested locally
• No console errors
• Existing functionality works as expected

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Checklist

• My code follows the project guidelines.
• I have tested my changes.
• I have updated the documentation if required.
• My changes address the related issue.
• This PR focuses on a single issue.

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Additional Notes

Snefru is Merkle's own hash design, complementing the already-present merkle-hellman.ts. It shares the configuration-exposure pattern (passes/outputBits) with HAVAL.

Note

Please Merge after 03:15 PM IST (GMT +5:30) 11 August.
Please ensure PR has ECSoC26 Tag before merge.

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Hello @Aakif-Kohari,

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[Aakif-Kohari]

Note

Please Merge after 03:15 PM IST (GMT +5:30) 11 August.
Please ensure PR has ECSoC26 Tag before merge.