Quick and dirty tool to convert RSA-PSS test cases using OpenSSL

convert.js

// Used to create test vectors for five-bells-condition
// https://github.com/interledger/five-bells-condition

'use strict'

const fs = require('fs')
const execSync = require('child_process').execSync
const Rsa = require('./src/crypto/rsa')
const pem = require('./src/util/pem')
const sha1Data = require('./test/data/rsa/sha1.json')

const HASH_ALGORITHM = 'sha256'

const rsa = new Rsa({
  hashAlgorithm: HASH_ALGORITHM
})
const outputData = sha1Data.map((group) => {
  fs.writeFileSync('priv.pem', group.privateKey)
  group.cases = group.cases.map((caseSpec) => {
    const message = new Buffer(caseSpec.message, 'hex')
    fs.writeFileSync('tmp.data', message)
    execSync('sh -c "openssl dgst -' + HASH_ALGORITHM + ' -sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:-1 -sign priv.pem -out tmp.data.sig tmp.data"')
    const signature = fs.readFileSync('tmp.data.sig')
    caseSpec.signature = signature.toString('hex')
    rsa.verify(pem.modulusFromPrivateKey(group.privateKey), message, signature)
    caseSpec.salt = rsa.pss.lastSalt.toString('hex')
    return caseSpec
  })
  return group
})

console.log(JSON.stringify(outputData, null, 2))