Son CV dans un terminal web en Javascript!
https://terminal-cv.gregandev.fr
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36 lines
1.1 KiB
36 lines
1.1 KiB
1 year ago
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var BN = require('bn.js')
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var randomBytes = require('randombytes')
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function blind (priv) {
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var r = getr(priv)
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var blinder = r.toRed(BN.mont(priv.modulus)).redPow(new BN(priv.publicExponent)).fromRed()
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return { blinder: blinder, unblinder: r.invm(priv.modulus) }
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}
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function getr (priv) {
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var len = priv.modulus.byteLength()
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var r
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do {
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r = new BN(randomBytes(len))
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} while (r.cmp(priv.modulus) >= 0 || !r.umod(priv.prime1) || !r.umod(priv.prime2))
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return r
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}
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function crt (msg, priv) {
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var blinds = blind(priv)
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var len = priv.modulus.byteLength()
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var blinded = new BN(msg).mul(blinds.blinder).umod(priv.modulus)
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var c1 = blinded.toRed(BN.mont(priv.prime1))
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var c2 = blinded.toRed(BN.mont(priv.prime2))
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var qinv = priv.coefficient
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var p = priv.prime1
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var q = priv.prime2
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var m1 = c1.redPow(priv.exponent1).fromRed()
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var m2 = c2.redPow(priv.exponent2).fromRed()
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var h = m1.isub(m2).imul(qinv).umod(p).imul(q)
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return m2.iadd(h).imul(blinds.unblinder).umod(priv.modulus).toArrayLike(Buffer, 'be', len)
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}
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crt.getr = getr
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module.exports = crt
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