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problem: cannot verify signature in browser

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solution: support NIST P-256 curve which is supported by browser's webcrypto
This commit is contained in:
Vyacheslav Shebanov
2022-06-17 05:08:18 +03:00
committed by GitHub
parent aeea27bb70
commit de5720897a
8 changed files with 73 additions and 21 deletions
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2
docs/reference-configuration.adoc
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@@ -578,7 +578,7 @@ signed-response:
| `algorithm`
| `SECP256K1`
| SECP256K1 only possible at this moment
| `SECP256K1` or `NIST-P256`
| `private-key`
|

14
src/main/kotlin/io/emeraldpay/dshackle/config/SignatureConfig.kt
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@@ -5,13 +5,25 @@ import java.util.Locale
class SignatureConfig {
enum class Algorithm {
SECP256K1
SECP256K1,
NIST_P256;
fun getCurveName(): String {
return if (this == SECP256K1) {
"secp256k1"
} else if (this == NIST_P256) {
"secp256r1"
} else {
throw IllegalStateException()
}
}
}
companion object {
fun algorithmOfString(algo: String): Algorithm {
val algorithm = when (algo.uppercase(Locale.getDefault())) {
"SECP256K1" -> Algorithm.SECP256K1
"NIST_P256", "NIST-P256", "NISTP256", "SECP256R1" -> Algorithm.NIST_P256
else -> throw IllegalArgumentException("Unknown algorithm or not allowed")
}
return algorithm

2
src/main/kotlin/io/emeraldpay/dshackle/upstream/signature/Secp256KSigner.kt → src/main/kotlin/io/emeraldpay/dshackle/upstream/signature/EcdsaSigner.kt
View File

@@ -6,7 +6,7 @@ import java.security.MessageDigest
import java.security.Signature
import java.security.interfaces.ECPrivateKey
class Secp256KSigner(
class EcdsaSigner(
private val privateKey: ECPrivateKey,
val keyId: Long,
) : ResponseSigner {

20
src/main/kotlin/io/emeraldpay/dshackle/upstream/signature/ResponseSignerFactory.kt
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@@ -37,28 +37,32 @@ open class ResponseSignerFactory(
private fun readKey(algorithm: SignatureConfig.Algorithm, pem: PemObject): Pair<ECPrivateKey, Long> {
val keyFactory = KeyFactory.getInstance("EC")
val key = when (algorithm) {
SignatureConfig.Algorithm.SECP256K1 -> {
SignatureConfig.Algorithm.SECP256K1, SignatureConfig.Algorithm.NIST_P256 -> {
val keySpec = PKCS8EncodedKeySpec(pem.content)
keyFactory.generatePrivate(keySpec)
}
}
if (key !is ECPrivateKey) {
throw IllegalStateException("Only ECDSA SECP256K1 keys are allowed")
throw IllegalStateException("Only EC keys are allowed")
}
if (key.params.toString() != "secp256k1 (1.3.132.0.10)") {
throw IllegalStateException("Only SECP256K1 are allowed for signing a response")
if (algorithm == SignatureConfig.Algorithm.SECP256K1 && key.params.toString().indexOf(SignatureConfig.Algorithm.SECP256K1.getCurveName()) < 0) {
throw IllegalStateException("Key is not SECP256K1, generate SECP256K1 or use another algorithm")
}
val publicKey = extractPublicKey(keyFactory, key)
if (algorithm == SignatureConfig.Algorithm.NIST_P256 && key.params.toString().indexOf(SignatureConfig.Algorithm.NIST_P256.getCurveName()) < 0) {
throw IllegalStateException("Key is not NIST P256, generate NIST P256 or use another algorithm")
}
val publicKey = extractPublicKey(keyFactory, key, algorithm)
val id = getPublicKeyId(publicKey)
return Pair(key, id)
}
fun extractPublicKey(keyFactory: KeyFactory, privateKey: ECPrivateKey): PublicKey {
val ecSpec = ECNamedCurveTable.getParameterSpec("secp256k1")
fun extractPublicKey(keyFactory: KeyFactory, privateKey: ECPrivateKey, algorithm: SignatureConfig.Algorithm): PublicKey {
val ecSpec = ECNamedCurveTable.getParameterSpec(algorithm.getCurveName())
val q: ECPoint = ecSpec.g.multiply(privateKey.s)
return keyFactory.generatePublic(ECPublicKeySpec(q, ecSpec))
}
@@ -79,7 +83,7 @@ open class ResponseSignerFactory(
return NoSigner()
}
val key = readKey(config.algorithm, config.privateKey!!)
return Secp256KSigner(key.first, key.second)
return EcdsaSigner(key.first, key.second)
}
override fun getObjectType(): Class<*>? {

37
src/test/groovy/io/emeraldpay/dshackle/upstream/signature/Secp256KSignerSpec.groovy → src/test/groovy/io/emeraldpay/dshackle/upstream/signature/EcdsaSignerSpec.groovy
View File

@@ -1,8 +1,6 @@
package io.emeraldpay.dshackle.upstream.signature
import io.emeraldpay.dshackle.config.SignatureConfig
import io.emeraldpay.dshackle.config.SignatureConfigReader
import io.emeraldpay.dshackle.test.TestingCommons
import io.emeraldpay.dshackle.upstream.Upstream
import org.apache.commons.codec.binary.Hex
import org.bouncycastle.jce.provider.BouncyCastleProvider
@@ -13,14 +11,13 @@ import spock.lang.Specification
import java.security.KeyFactory
import java.security.KeyPairGenerator
import java.security.MessageDigest
import java.security.SecureRandom
import java.security.Security
import java.security.Signature
import java.security.interfaces.ECPrivateKey
import java.security.spec.ECGenParameterSpec
import java.security.spec.PKCS8EncodedKeySpec
class Secp256KSignerSpec extends Specification {
class EcdsaSignerSpec extends Specification {
def setupSpec() {
Security.addProvider(new BouncyCastleProvider())
@@ -48,12 +45,34 @@ class Secp256KSignerSpec extends Specification {
file.delete()
}
def "Reads private key NIST P256"() {
setup:
def file = File.createTempFile("test", ".pem")
def keygen = KeyPairGenerator.getInstance("EC")
keygen.initialize(new ECGenParameterSpec("secp256r1"))
def key = keygen.generateKeyPair()
def keyBuilder = new PKCS8EncodedKeySpec(key.getPrivate().getEncoded())
def writer = new PemWriter(new FileWriter(file.path))
writer.writeObject(new PemObject("PRIVATE KEY", keyBuilder.getEncoded()))
writer.close()
when:
def signer = new ResponseSignerFactory(new SignatureConfig())
def act = signer.readKey(SignatureConfig.Algorithm.NIST_P256, file.absolutePath).first
then:
act == key.getPrivate()
cleanup:
file.delete()
}
def "Id is a hash of x509 public key"() {
setup:
def conf = new SignatureConfig()
conf.enabled = true
conf.privateKey = "testing/dshackle/test_key"
def signer = new ResponseSignerFactory(conf).getObject() as Secp256KSigner
def signer = new ResponseSignerFactory(conf).getObject() as EcdsaSigner
// To verify the test, check the hash of test key above:
//
@@ -73,7 +92,7 @@ class Secp256KSignerSpec extends Specification {
def up = Mock(Upstream) {
_ * getId() >> "infura"
}
def signer = new Secp256KSigner(Stub(ECPrivateKey), 100L)
def signer = new EcdsaSigner(Stub(ECPrivateKey), 100L)
when:
def act = signer.wrapMessage(10, "test".bytes, up)
@@ -96,7 +115,7 @@ class Secp256KSignerSpec extends Specification {
verifier.initVerify(pair.getPublic())
verifier.update("DSHACKLESIG/10/infura/9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08".getBytes())
def signer = new Secp256KSigner((pair.getPrivate() as ECPrivateKey), 100L)
def signer = new EcdsaSigner((pair.getPrivate() as ECPrivateKey), 100L)
when:
def sig = signer.sign(10, result, up)
@@ -121,12 +140,12 @@ class Secp256KSignerSpec extends Specification {
def factory = new ResponseSignerFactory(conf)
def sk = factory.readKey(conf.algorithm, conf.privateKey).first
def pk = factory.extractPublicKey(KeyFactory.getInstance("EC"), sk)
def pk = factory.extractPublicKey(KeyFactory.getInstance("EC"), sk, SignatureConfig.Algorithm.SECP256K1)
def verifier = Signature.getInstance("SHA256withECDSA")
verifier.initVerify(pk)
verifier.update("DSHACKLESIG/10/infura/${Hex.encodeHexString(sha256.digest(result))}".getBytes())
def signer = factory.getObject() as Secp256KSigner
def signer = factory.getObject() as EcdsaSigner
when:
def sig = signer.sign(10, result, up)

12
testing/simple-upstream/src/main/groovy/testing/CommonHandlers.groovy
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@@ -1,13 +1,25 @@
package testing
import com.fasterxml.jackson.databind.ObjectMapper
class CommonHandlers implements CallHandler {
ObjectMapper objectMapper
ResourceResponse resourceResponse
CommonHandlers(ObjectMapper objectMapper) {
this.objectMapper = objectMapper
this.resourceResponse = new ResourceResponse(objectMapper)
}
@Override
Result handle(String method, List<Object> params) {
if (method == "eth_syncing") {
return Result.ok(false)
}
if (method == "eth_chainId") {
return resourceResponse.respondWith("chain-id.json")
}
return null
}
}

2
testing/simple-upstream/src/main/groovy/testing/SimpleUpstream.groovy
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@@ -17,7 +17,7 @@ class SimpleUpstream {
internalHandler = new InternalHandler()
handlers << new TestcaseHandler(objectMapper)
handlers << new CommonHandlers()
handlers << new CommonHandlers(objectMapper)
handlers << new BlocksHandler(objectMapper)
handlers << new PingPongHandler()
handlers << internalHandler

5
testing/simple-upstream/src/main/resources/chain-id.json Normal file
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@@ -0,0 +1,5 @@
{
"id": 83,
"jsonrpc": "2.0",
"result": "0x3d"
}