Merge pull request #337 from bitcoinjs/rfc6979fix
RF6979 compliance in regards to invalid ECDSA signatures
This commit is contained in:
Wei Lu
commit
6f373899f2
4 changed files with 258 additions and 92 deletions
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@ -52,7 +52,7 @@
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"bs58check": "1.0.3",
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"crypto-browserify": "^3.2.6",
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"ecurve": "1.0.0",
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"typeforce": "0.0.2"
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"typeforce": "0.1.0"
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},
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"devDependencies": {
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"async": "^0.9.0",
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62
src/ecdsa.js
62
src/ecdsa.js
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@ -9,10 +9,38 @@ var ZERO = new Buffer([0])
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var ONE = new Buffer([1])
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// https://tools.ietf.org/html/rfc6979#section-3.2
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function deterministicGenerateK(curve, hash, d) {
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function deterministicGenerateK(curve, hash, d, checkSig) {
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typeForce('Buffer', hash)
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typeForce('BigInteger', d)
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// FIXME: remove/uncomment for 2.0.0
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// typeForce('Function', checkSig)
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if (typeof checkSig !== 'function') {
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console.warn('deterministicGenerateK requires a checkSig callback in 2.0.0, see #337 for more information')
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checkSig = function(k) {
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var G = curve.G
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var n = curve.n
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var e = BigInteger.fromBuffer(hash)
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var Q = G.multiply(k)
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if (curve.isInfinity(Q))
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return false
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var r = Q.affineX.mod(n)
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if (r.signum() === 0)
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return false
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var s = k.modInverse(n).multiply(e.add(d.multiply(r))).mod(n)
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if (s.signum() === 0)
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return false
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return true
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}
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}
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// sanity check
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assert.equal(hash.length, 32, 'Hash must be 256 bit')
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@ -20,6 +48,7 @@ function deterministicGenerateK(curve, hash, d) {
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var k = new Buffer(32)
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var v = new Buffer(32)
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// Step A, ignored as hash already provided
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// Step B
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v.fill(1)
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@ -54,8 +83,8 @@ function deterministicGenerateK(curve, hash, d) {
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var T = BigInteger.fromBuffer(v)
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// Step H3, repeat until T is within the interval [1, n - 1]
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while ((T.signum() <= 0) || (T.compareTo(curve.n) >= 0)) {
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// Step H3, repeat until T is within the interval [1, n - 1] and is suitable for ECDSA
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while ((T.signum() <= 0) || (T.compareTo(curve.n) >= 0) || !checkSig(T)) {
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k = crypto.createHmac('sha256', k)
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.update(v)
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.update(ZERO)
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@ -63,6 +92,9 @@ function deterministicGenerateK(curve, hash, d) {
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v = crypto.createHmac('sha256', k).update(v).digest()
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// Step H1/H2a, again, ignored as tlen === qlen (256 bit)
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// Step H2b again
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v = crypto.createHmac('sha256', k).update(v).digest()
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T = BigInteger.fromBuffer(v)
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}
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@ -70,18 +102,28 @@ function deterministicGenerateK(curve, hash, d) {
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}
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function sign(curve, hash, d) {
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var k = deterministicGenerateK(curve, hash, d)
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var r, s
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var e = BigInteger.fromBuffer(hash)
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var n = curve.n
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var G = curve.G
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var Q = G.multiply(k)
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var e = BigInteger.fromBuffer(hash)
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var r = Q.affineX.mod(n)
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assert.notEqual(r.signum(), 0, 'Invalid R value')
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deterministicGenerateK(curve, hash, d, function(k) {
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var Q = G.multiply(k)
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var s = k.modInverse(n).multiply(e.add(d.multiply(r))).mod(n)
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assert.notEqual(s.signum(), 0, 'Invalid S value')
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if (curve.isInfinity(Q))
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return false
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r = Q.affineX.mod(n)
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if (r.signum() === 0)
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return false
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s = k.modInverse(n).multiply(e.add(d.multiply(r))).mod(n)
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if (s.signum() === 0)
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return false
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return true
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})
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var N_OVER_TWO = n.shiftRight(1)
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@ -15,12 +15,25 @@ var fixtures = require('./fixtures/ecdsa.json')
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describe('ecdsa', function() {
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describe('deterministicGenerateK', function() {
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fixtures.valid.forEach(function(f) {
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function checkSig() { return true }
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fixtures.valid.ecdsa.forEach(function(f) {
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it('for \"' + f.message + '\"', function() {
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var d = BigInteger.fromHex(f.d)
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var h1 = crypto.sha256(f.message)
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var k = ecdsa.deterministicGenerateK(curve, h1, d)
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var k = ecdsa.deterministicGenerateK(curve, h1, d, checkSig)
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assert.equal(k.toHex(), f.k)
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})
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})
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// FIXME: remove in 2.0.0
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fixtures.valid.ecdsa.forEach(function(f) {
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it('(deprecated) for \"' + f.message + '\"', function() {
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var d = BigInteger.fromHex(f.d)
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var h1 = crypto.sha256(f.message)
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var k = ecdsa.deterministicGenerateK(curve, h1, d) // default checkSig
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assert.equal(k.toHex(), f.k)
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})
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})
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@ -28,21 +41,58 @@ describe('ecdsa', function() {
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it('loops until an appropriate k value is found', sinon.test(function() {
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this.mock(BigInteger).expects('fromBuffer')
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.exactly(3)
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.onCall(0).returns(new BigInteger('0'))
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.onCall(1).returns(curve.n)
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.onCall(2).returns(new BigInteger('42'))
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.onCall(0).returns(new BigInteger('0')) // < 1
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.onCall(1).returns(curve.n) // > n-1
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.onCall(2).returns(new BigInteger('42')) // valid
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var d = new BigInteger('1')
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var h1 = new Buffer(32)
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var k = ecdsa.deterministicGenerateK(curve, h1, d)
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var k = ecdsa.deterministicGenerateK(curve, h1, d, checkSig)
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assert.equal(k.toString(), '42')
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}))
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it('loops until a suitable signature is found', sinon.test(function() {
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this.mock(BigInteger).expects('fromBuffer')
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.exactly(4)
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.onCall(0).returns(new BigInteger('0')) // < 1
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.onCall(1).returns(curve.n) // > n-1
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.onCall(2).returns(new BigInteger('42')) // valid, but 'bad' signature
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.onCall(3).returns(new BigInteger('53')) // valid, good signature
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var checkSig = this.mock()
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checkSig.exactly(2)
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checkSig.onCall(0).returns(false) // bad signature
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checkSig.onCall(1).returns(true) // good signature
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var d = new BigInteger('1')
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var h1 = new Buffer(32)
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var k = ecdsa.deterministicGenerateK(curve, h1, d, checkSig)
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assert.equal(k.toString(), '53')
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}))
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fixtures.valid.rfc6979.forEach(function(f) {
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it('produces the expected k values for ' + f.message + ' if k wasn\'t suitable', function() {
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var d = BigInteger.fromHex(f.d)
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var h1 = crypto.sha256(f.message)
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var results = []
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ecdsa.deterministicGenerateK(curve, h1, d, function(k) {
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results.push(k)
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return results.length === 16
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})
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assert.equal(results[0].toHex(), f.k0)
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assert.equal(results[1].toHex(), f.k1)
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assert.equal(results[15].toHex(), f.k15)
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})
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})
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})
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describe('recoverPubKey', function() {
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fixtures.valid.forEach(function(f) {
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fixtures.valid.ecdsa.forEach(function(f) {
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it('recovers the pubKey for ' + f.d, function() {
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var d = BigInteger.fromHex(f.d)
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var Q = curve.G.multiply(d)
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@ -94,7 +144,7 @@ describe('ecdsa', function() {
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})
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describe('sign', function() {
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fixtures.valid.forEach(function(f) {
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fixtures.valid.ecdsa.forEach(function(f) {
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it('produces a deterministic signature for \"' + f.message + '\"', function() {
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var d = BigInteger.fromHex(f.d)
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var hash = crypto.sha256(f.message)
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@ -116,7 +166,7 @@ describe('ecdsa', function() {
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})
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describe('verify/verifyRaw', function() {
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fixtures.valid.forEach(function(f) {
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fixtures.valid.ecdsa.forEach(function(f) {
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it('verifies a valid signature for \"' + f.message + '\"', function() {
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var d = BigInteger.fromHex(f.d)
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var H = crypto.sha256(f.message)
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216
test/fixtures/ecdsa.json
vendored
216
test/fixtures/ecdsa.json
vendored
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@ -1,76 +1,150 @@
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{
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"valid": [
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{
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"d": "01",
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"k": "ec633bd56a5774a0940cb97e27a9e4e51dc94af737596a0c5cbb3d30332d92a5",
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"message": "Everything should be made as simple as possible, but not simpler.",
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"i": 0,
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"signature": {
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"r": "23362334225185207751494092901091441011938859014081160902781146257181456271561",
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"s": "50433721247292933944369538617440297985091596895097604618403996029256432099938"
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"valid": {
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"ecdsa": [
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{
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"d": "01",
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"k": "ec633bd56a5774a0940cb97e27a9e4e51dc94af737596a0c5cbb3d30332d92a5",
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"message": "Everything should be made as simple as possible, but not simpler.",
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"i": 0,
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"signature": {
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"r": "23362334225185207751494092901091441011938859014081160902781146257181456271561",
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"s": "50433721247292933944369538617440297985091596895097604618403996029256432099938"
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}
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},
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{
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"d": "fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364140",
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"k": "9dc74cbfd383980fb4ae5d2680acddac9dac956dca65a28c80ac9c847c2374e4",
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"message": "Equations are more important to me, because politics is for the present, but an equation is something for eternity.",
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"i": 0,
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"signature": {
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"r": "38341707918488238920692284707283974715538935465589664377561695343399725051885",
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"s": "3180566392414476763164587487324397066658063772201694230600609996154610926757"
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}
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},
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{
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"d": "fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364140",
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"k": "fd27071f01648ebbdd3e1cfbae48facc9fa97edc43bbbc9a7fdc28eae13296f5",
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"message": "Not only is the Universe stranger than we think, it is stranger than we can think.",
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"i": 0,
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"signature": {
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"r": "115464191557905790016094131873849783294273568009648050793030031933291767741904",
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"s": "50562520307781850052192542766631199590053690478900449960232079510155113443971"
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}
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},
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{
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"d": "0000000000000000000000000000000000000000000000000000000000000001",
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"k": "f0cd2ba5fc7c183de589f6416220a36775a146740798756d8d949f7166dcc87f",
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"message": "How wonderful that we have met with a paradox. Now we have some hope of making progress.",
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"i": 1,
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"signature": {
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"r": "87230998027579607140680851455601772643840468630989315269459846730712163783123",
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"s": "53231320085894623106179381504478252331065330583563809963303318469380290929875"
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}
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},
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{
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"d": "69ec59eaa1f4f2e36b639716b7c30ca86d9a5375c7b38d8918bd9c0ebc80ba64",
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"k": "6bb4a594ad57c1aa22dbe991a9d8501daf4688bf50a4892ef21bd7c711afda97",
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"message": "Computer science is no more about computers than astronomy is about telescopes.",
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"i": 0,
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"signature": {
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"r": "51348483531757779992459563033975330355971795607481991320287437101831125115997",
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"s": "6277080015686056199074771961940657638578000617958603212944619747099038735862"
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}
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},
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{
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"d": "00000000000000000000000000007246174ab1e92e9149c6e446fe194d072637",
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"k": "097b5c8ee22c3ea78a4d3635e0ff6fe85a1eb92ce317ded90b9e71aab2b861cb",
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"message": "...if you aren't, at any given time, scandalized by code you wrote five or even three years ago, you're not learning anywhere near enough",
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"i": 1,
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"signature": {
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"r": "113979859486826658566290715281614250298918272782414232881639314569529560769671",
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"s": "6517071009538626957379450615706485096874328019806177698938278220732027419959"
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}
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},
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{
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"d": "000000000000000000000000000000000000000000056916d0f9b31dc9b637f3",
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"k": "19355c36c8cbcdfb2382e23b194b79f8c97bf650040fc7728dfbf6b39a97c25b",
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"message": "The question of whether computers can think is like the question of whether submarines can swim.",
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"i": 1,
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"signature": {
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"r": "93122007060065279508564838030979550535085999589142852106617159184757394422777",
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"s": "3078539468410661027472930027406594684630312677495124015420811882501887769839"
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}
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}
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},
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{
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"d": "fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364140",
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"k": "9dc74cbfd383980fb4ae5d2680acddac9dac956dca65a28c80ac9c847c2374e4",
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"message": "Equations are more important to me, because politics is for the present, but an equation is something for eternity.",
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"i": 0,
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"signature": {
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"r": "38341707918488238920692284707283974715538935465589664377561695343399725051885",
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"s": "3180566392414476763164587487324397066658063772201694230600609996154610926757"
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],
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"rfc6979": [
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{
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"message": "test data",
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"d": "fee0a1f7afebf9d2a5a80c0c98a31c709681cce195cbcd06342b517970c0be1e",
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"k0": "fcce1de7a9bcd6b2d3defade6afa1913fb9229e3b7ddf4749b55c4848b2a196e",
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"k1": "727fbcb59eb48b1d7d46f95a04991fc512eb9dbf9105628e3aec87428df28fd8",
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"k15": "398f0e2c9f79728f7b3d84d447ac3a86d8b2083c8f234a0ffa9c4043d68bd258"
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},
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{
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"message": "Everything should be made as simple as possible, but not simpler.",
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"d": "0000000000000000000000000000000000000000000000000000000000000001",
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"k0": "ec633bd56a5774a0940cb97e27a9e4e51dc94af737596a0c5cbb3d30332d92a5",
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"k1": "df55b6d1b5c48184622b0ead41a0e02bfa5ac3ebdb4c34701454e80aabf36f56",
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"k15": "def007a9a3c2f7c769c75da9d47f2af84075af95cadd1407393dc1e26086ef87"
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},
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{
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"message": "Satoshi Nakamoto",
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"d": "0000000000000000000000000000000000000000000000000000000000000002",
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"k0": "d3edc1b8224e953f6ee05c8bbf7ae228f461030e47caf97cde91430b4607405e",
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"k1": "f86d8e43c09a6a83953f0ab6d0af59fb7446b4660119902e9967067596b58374",
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"k15": "241d1f57d6cfd2f73b1ada7907b199951f95ef5ad362b13aed84009656e0254a"
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},
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{
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"message": "Diffie Hellman",
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"d": "7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f",
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"k0": "c378a41cb17dce12340788dd3503635f54f894c306d52f6e9bc4b8f18d27afcc",
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"k1": "90756c96fef41152ac9abe08819c4e95f16da2af472880192c69a2b7bac29114",
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"k15": "7b3f53300ab0ccd0f698f4d67db87c44cf3e9e513d9df61137256652b2e94e7c"
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},
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{
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"message": "Japan",
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"d": "8080808080808080808080808080808080808080808080808080808080808080",
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"k0": "f471e61b51d2d8db78f3dae19d973616f57cdc54caaa81c269394b8c34edcf59",
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"k1": "6819d85b9730acc876fdf59e162bf309e9f63dd35550edf20869d23c2f3e6d17",
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"k15": "d8e8bae3ee330a198d1f5e00ad7c5f9ed7c24c357c0a004322abca5d9cd17847"
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},
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{
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"message": "Bitcoin",
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"d": "fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364140",
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"k0": "36c848ffb2cbecc5422c33a994955b807665317c1ce2a0f59c689321aaa631cc",
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"k1": "4ed8de1ec952a4f5b3bd79d1ff96446bcd45cabb00fc6ca127183e14671bcb85",
|
||||
"k15": "56b6f47babc1662c011d3b1f93aa51a6e9b5f6512e9f2e16821a238d450a31f8"
|
||||
},
|
||||
{
|
||||
"message": "i2FLPP8WEus5WPjpoHwheXOMSobUJVaZM1JPMQZq",
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||||
"d": "fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364140",
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"k0": "6e9b434fcc6bbb081a0463c094356b47d62d7efae7da9c518ed7bac23f4e2ed6",
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||||
"k1": "ae5323ae338d6117ce8520a43b92eacd2ea1312ae514d53d8e34010154c593bb",
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||||
"k15": "3eaa1b61d1b8ab2f1ca71219c399f2b8b3defa624719f1e96fe3957628c2c4ea"
|
||||
},
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||||
{
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||||
"message": "lEE55EJNP7aLrMtjkeJKKux4Yg0E8E1SAJnWTCEh",
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||||
"d": "3881e5286abc580bb6139fe8e83d7c8271c6fe5e5c2d640c1f0ed0e1ee37edc9",
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"k0": "5b606665a16da29cc1c5411d744ab554640479dd8abd3c04ff23bd6b302e7034",
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||||
"k1": "f8b25263152c042807c992eacd2ac2cc5790d1e9957c394f77ea368e3d9923bd",
|
||||
"k15": "ea624578f7e7964ac1d84adb5b5087dd14f0ee78b49072aa19051cc15dab6f33"
|
||||
},
|
||||
{
|
||||
"message": "2SaVPvhxkAPrayIVKcsoQO5DKA8Uv5X/esZFlf+y",
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||||
"d": "7259dff07922de7f9c4c5720d68c9745e230b32508c497dd24cb95ef18856631",
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||||
"k0": "3ab6c19ab5d3aea6aa0c6da37516b1d6e28e3985019b3adb388714e8f536686b",
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||||
"k1": "19af21b05004b0ce9cdca82458a371a9d2cf0dc35a813108c557b551c08eb52e",
|
||||
"k15": "117a32665fca1b7137a91c4739ac5719fec0cf2e146f40f8e7c21b45a07ebc6a"
|
||||
},
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||||
{
|
||||
"message": "00A0OwO2THi7j5Z/jp0FmN6nn7N/DQd6eBnCS+/b",
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"d": "0d6ea45d62b334777d6995052965c795a4f8506044b4fd7dc59c15656a28f7aa",
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"k0": "79487de0c8799158294d94c0eb92ee4b567e4dc7ca18addc86e49d31ce1d2db6",
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"k1": "9561d2401164a48a8f600882753b3105ebdd35e2358f4f808c4f549c91490009",
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||||
"k15": "b0d273634129ff4dbdf0df317d4062a1dbc58818f88878ffdb4ec511c77976c0"
|
||||
}
|
||||
},
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||||
{
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||||
"d": "fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364140",
|
||||
"k": "fd27071f01648ebbdd3e1cfbae48facc9fa97edc43bbbc9a7fdc28eae13296f5",
|
||||
"message": "Not only is the Universe stranger than we think, it is stranger than we can think.",
|
||||
"i": 0,
|
||||
"signature": {
|
||||
"r": "115464191557905790016094131873849783294273568009648050793030031933291767741904",
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||||
"s": "50562520307781850052192542766631199590053690478900449960232079510155113443971"
|
||||
}
|
||||
},
|
||||
{
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||||
"d": "0000000000000000000000000000000000000000000000000000000000000001",
|
||||
"k": "f0cd2ba5fc7c183de589f6416220a36775a146740798756d8d949f7166dcc87f",
|
||||
"message": "How wonderful that we have met with a paradox. Now we have some hope of making progress.",
|
||||
"i": 1,
|
||||
"signature": {
|
||||
"r": "87230998027579607140680851455601772643840468630989315269459846730712163783123",
|
||||
"s": "53231320085894623106179381504478252331065330583563809963303318469380290929875"
|
||||
}
|
||||
},
|
||||
{
|
||||
"d": "69ec59eaa1f4f2e36b639716b7c30ca86d9a5375c7b38d8918bd9c0ebc80ba64",
|
||||
"k": "6bb4a594ad57c1aa22dbe991a9d8501daf4688bf50a4892ef21bd7c711afda97",
|
||||
"message": "Computer science is no more about computers than astronomy is about telescopes.",
|
||||
"i": 0,
|
||||
"signature": {
|
||||
"r": "51348483531757779992459563033975330355971795607481991320287437101831125115997",
|
||||
"s": "6277080015686056199074771961940657638578000617958603212944619747099038735862"
|
||||
}
|
||||
},
|
||||
{
|
||||
"d": "00000000000000000000000000007246174ab1e92e9149c6e446fe194d072637",
|
||||
"k": "097b5c8ee22c3ea78a4d3635e0ff6fe85a1eb92ce317ded90b9e71aab2b861cb",
|
||||
"message": "...if you aren't, at any given time, scandalized by code you wrote five or even three years ago, you're not learning anywhere near enough",
|
||||
"i": 1,
|
||||
"signature": {
|
||||
"r": "113979859486826658566290715281614250298918272782414232881639314569529560769671",
|
||||
"s": "6517071009538626957379450615706485096874328019806177698938278220732027419959"
|
||||
}
|
||||
},
|
||||
{
|
||||
"d": "000000000000000000000000000000000000000000056916d0f9b31dc9b637f3",
|
||||
"k": "19355c36c8cbcdfb2382e23b194b79f8c97bf650040fc7728dfbf6b39a97c25b",
|
||||
"message": "The question of whether computers can think is like the question of whether submarines can swim.",
|
||||
"i": 1,
|
||||
"signature": {
|
||||
"r": "93122007060065279508564838030979550535085999589142852106617159184757394422777",
|
||||
"s": "3078539468410661027472930027406594684630312677495124015420811882501887769839"
|
||||
}
|
||||
}
|
||||
],
|
||||
]
|
||||
},
|
||||
"invalid": {
|
||||
"recoverPubKey": [
|
||||
{
|
||||
|
|
@ -219,4 +293,4 @@
|
|||
}
|
||||
]
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue