mcl-wasm

A portable and fast pairing-based cryptography library for Node.js by WebAssembly

Abstract

see mcl

News

• 2021/Mar/02 improve performance
• 2020/Nov/10 setup function has changed.
• add mulVec(xVec, yVec) where xVec is an array of G1 or G2 and yVec is an array of Fr, which returns sum of xVec[i] yVec[i].
• G1.setHashOf is compatible with hash-to-curve-09 BLS12381G1_XMD:SHA-256_SSWU_RO_
• support only BN254, ZKSNARK, BLS12-381 to remove mcl_c512.js
• add mcl.precomputedMillerLoop2 and mcl.precomputedMillerLoop2mixed

How to use

The version v0.6.0 breaks backward compatibility of the entry point.

• Node.js : const mcl = require('mcl-wasm')
• React : const mcl = require('mcl-wasm/browser')
• HTML : <script src="https://herumi.github.io/mcl-wasm/browser/mcl.js"></script>

for Node.js

node test/test.js

browser demo

ID-based encryption

usages

init

// Ethereum 2.0 spec mode
mcl.init(mcl.BLS12_381)
  .then(() => {
    mcl.setETHserialization(true) // Ethereum serialization
    mcl.setMapToMode(mcl.IRTF) // for G2.setHashOf(msg)
    ...
  })

string conversion

a = new mcl.Fr()
a.setStr('255') // set 255
a.setStr('0xff') // set 0xff = 255
a.setStr('ff', 16) // set ff as hex-string

a.getStr() // '255'
a.getStr(16) // 'ff'

serialization

// byte array serialization
b.deserialize(a.serialize()) // b.isEqualTo(a)
// hex string of serialization()
b.deserializeHexStr(a.serializeToHexStr())

// serialization like Ethereum 2.0 only for BLS12-381
mcl.setETHserialization(true)

deserialization

/*
  it is big cost to to verify the order
  call once after init() if you want to disable it
  cf. sub group problem
*/
mcl.verifyOrderG1(false)
mcl.verifyOrderG2(false)

see test.js

License

modified new BSD License http://opensource.org/licenses/BSD-3-Clause

History

2019/Jan/31 add Fp.mapToG1

Author

MITSUNARI Shigeo([e-mail])

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