schnorr 0.0.3

A pure dart package for generic schnorr signature algorithm, supporting all curves in elliptic package.

0.0.3

• SECURITY: remove print() calls in deterministicSign that leaked the secret nonce and intermediate values to stdout.
• SECURITY: fix highestFactorsOf2, which returned 0 for exact powers of two and corrupted the jacobi symbol used by verify() (residuosity) and getK() (signing nonce parity).
• Fix batchVerify: return the real result (was always false), select the Jacobi-1 root for R, validate R is on-curve, and encode (a*e) mod n correctly.
• Fix deterministicGetRandA: uniform coefficient in [1, n-1] (nextInt(1) always returned 0); reuse a single Random.secure().
• Fix hashToInt to apply the excess right-shift (was a no-op).
• Require elliptic 0.4.x for constant-time (Montgomery-ladder) scalar multiplication.
• Add a comprehensive test suite (33 tests).

0.0.2

• Update doc

0.0.1

• Initial version.
• Pass test cases based on S256