jedisct1/wasm-crypto

A WebAssembly (via AssemblyScript) set of cryptographic primitives for building authentication and key exchange protocols.

TypeScript

248

247 commits

updated Jun 18, 2026

See the code

README

A WebAssembly (via AssemblyScript) set of cryptographic primitives for building authentication and key exchange protocols.

Currently provides:

RFC 8032/libsodium-compatible detached EdDSA signatures
Ed25519 deterministic and non-deterministic signatures with cofactored verification.
Deterministic and non-deterministic signatures over the Ristretto group.
Hashing (simple + multi-parts)
Authentication (HMAC-SHA-512, HMAC-SHA-256)
Point validation, point addition, scalar multiplication with and without clamping over Edwards25519 using the standard Ed25519 point encoding.
Fast encoded element validation, hash-to-group, addition, scalar multiplication over the Ristretto prime-order group.
Scalar reduction, scalar multiplication, scalar inversion mod the order of the prime-order groups for multiparty computation and oblivious pseudorandom functions.
Constant-time comparison and encoding.

Example use case.

assemblyscript

cryptography

ed25519

eddsa

wasm

webassembly

Contributors

jedisct1

224 commits

MaxGraey

14 commits

jtenner

3 commits

dependabot-preview[bot]

3 commits

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jedisct1/wasm-crypto

A WebAssembly (via AssemblyScript) set of cryptographic primitives for building authentication and key exchange protocols.

TypeScript

248

247 commits

updated Jun 18, 2026

See the code

README

A WebAssembly (via AssemblyScript) set of cryptographic primitives for building authentication and key exchange protocols.

Currently provides:

RFC 8032/libsodium-compatible detached EdDSA signatures
Ed25519 deterministic and non-deterministic signatures with cofactored verification.
Deterministic and non-deterministic signatures over the Ristretto group.
Hashing (simple + multi-parts)
Authentication (HMAC-SHA-512, HMAC-SHA-256)
Point validation, point addition, scalar multiplication with and without clamping over Edwards25519 using the standard Ed25519 point encoding.
Fast encoded element validation, hash-to-group, addition, scalar multiplication over the Ristretto prime-order group.
Scalar reduction, scalar multiplication, scalar inversion mod the order of the prime-order groups for multiparty computation and oblivious pseudorandom functions.
Constant-time comparison and encoding.