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Add BLS12-377 support #73

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@p4u p4u commented Jan 8, 2026

  • Added BLS12-377 curve implementation with correct parameters.
  • Updated build_f2m.js to support square root for q % 4 == 1 (general norm-based algorithm), required for BLS12-377 G2.
  • Cleaned up build_curve_jacobian_a0.js.

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Add BLS12-377 support
818d8ae 
- Added BLS12-377 curve implementation with correct parameters.
- Updated build_f2m.js to support square root for q % 4 == 1 (general norm-based algorithm), essential for BLS12-377 G2.
- Cleaned up build_curve_jacobian_a0.js.
@p4u p4u mentioned this pull request Jan 8, 2026
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p4u commented Jan 8, 2026

Add an if/else (q % 4n === 3n) block because of the different properties of the base field modulus $q$.

Curves BN128 and BLS12-381 have a modulus $q$ where $q \equiv 3 \pmod 4$. But BLS12-377 has a modulus $q \equiv 1 \pmod 4$.

The if block preserves the performance optimization for existing curves ($3 \pmod 4$), while the else block adds the necessary support for BLS12-377 ($1 \pmod 4$) by employing the generic Tonelli-Shanks algorithm.

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