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Base64 no wrap and extension for the reverse operation

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This commit is contained in:
Benoit Marty 2020-01-23 10:17:07 +01:00
parent d2fab91e9d
commit 37b950897f
5 changed files with 140 additions and 40 deletions
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46
matrix-sdk-android/src/androidTest/java/im/vector/matrix/android/internal/crypto/verification/qrcode/SharedSecretTest.kt Normal file
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@ -0,0 +1,46 @@
/*
* Copyright 2020 New Vector Ltd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package im.vector.matrix.android.internal.crypto.verification.qrcode
import androidx.test.ext.junit.runners.AndroidJUnit4
import im.vector.matrix.android.InstrumentedTest
import org.amshove.kluent.shouldBe
import org.amshove.kluent.shouldNotBeEqualTo
import org.junit.FixMethodOrder
import org.junit.Test
import org.junit.runner.RunWith
import org.junit.runners.MethodSorters
@RunWith(AndroidJUnit4::class)
@FixMethodOrder(MethodSorters.JVM)
class SharedSecretTest : InstrumentedTest {
@Test
fun testSharedSecretLengthCase() {
val sharedSecret = generateSharedSecret()
sharedSecret.length shouldBe 43
}
@Test
fun testSharedDiffCase() {
val sharedSecret1 = generateSharedSecret()
val sharedSecret2 = generateSharedSecret()
sharedSecret1 shouldNotBeEqualTo sharedSecret2
}
}

81
matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/crosssigning/DefaultCrossSigningService.kt
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@ -16,7 +16,6 @@
package im.vector.matrix.android.internal.crypto.crosssigning
import android.util.Base64
import dagger.Lazy
import im.vector.matrix.android.api.MatrixCallback
import im.vector.matrix.android.api.auth.data.Credentials
@ -83,40 +82,43 @@ internal class DefaultCrossSigningService @Inject constructor(
Timber.i("## CrossSigning - Found Existing self signed keys")
Timber.i("## CrossSigning - Checking if private keys are known")
cryptoStore.getCrossSigningPrivateKeys()?.let { privateKeyinfo ->
privateKeyinfo.master?.let { privateKey ->
val keySeed = Base64.decode(privateKey, Base64.NO_PADDING)
val pkSigning = OlmPkSigning()
if (pkSigning.initWithSeed(keySeed) == mxCrossSigningInfo.masterKey()?.unpaddedBase64PublicKey) {
masterPkSigning = pkSigning
Timber.i("## CrossSigning - Loading master key success")
} else {
Timber.w("## CrossSigning - Public master key does not match the private key")
// TODO untrust
}
}
privateKeyinfo.user?.let { privateKey ->
val keySeed = Base64.decode(privateKey, Base64.NO_PADDING)
val pkSigning = OlmPkSigning()
if (pkSigning.initWithSeed(keySeed) == mxCrossSigningInfo.userKey()?.unpaddedBase64PublicKey) {
userPkSigning = pkSigning
Timber.i("## CrossSigning - Loading User Signing key success")
} else {
Timber.w("## CrossSigning - Public User key does not match the private key")
// TODO untrust
}
}
privateKeyinfo.selfSigned?.let { privateKey ->
val keySeed = Base64.decode(privateKey, Base64.NO_PADDING)
val pkSigning = OlmPkSigning()
if (pkSigning.initWithSeed(keySeed) == mxCrossSigningInfo.selfSigningKey()?.unpaddedBase64PublicKey) {
selfSigningPkSigning = pkSigning
Timber.i("## CrossSigning - Loading Self Signing key success")
} else {
Timber.w("## CrossSigning - Public Self Signing key does not match the private key")
// TODO untrust
}
}
cryptoStore.getCrossSigningPrivateKeys()?.let { privateKeysInfo ->
privateKeysInfo.master
?.fromBase64NoPadding()
?.let { privateKeySeed ->
val pkSigning = OlmPkSigning()
if (pkSigning.initWithSeed(privateKeySeed) == mxCrossSigningInfo.masterKey()?.unpaddedBase64PublicKey) {
masterPkSigning = pkSigning
Timber.i("## CrossSigning - Loading master key success")
} else {
Timber.w("## CrossSigning - Public master key does not match the private key")
// TODO untrust
}
}
privateKeysInfo.user
?.fromBase64NoPadding()
?.let { privateKeySeed ->
val pkSigning = OlmPkSigning()
if (pkSigning.initWithSeed(privateKeySeed) == mxCrossSigningInfo.userKey()?.unpaddedBase64PublicKey) {
userPkSigning = pkSigning
Timber.i("## CrossSigning - Loading User Signing key success")
} else {
Timber.w("## CrossSigning - Public User key does not match the private key")
// TODO untrust
}
}
privateKeysInfo.selfSigned
?.fromBase64NoPadding()
?.let { privateKeySeed ->
val pkSigning = OlmPkSigning()
if (pkSigning.initWithSeed(privateKeySeed) == mxCrossSigningInfo.selfSigningKey()?.unpaddedBase64PublicKey) {
selfSigningPkSigning = pkSigning
Timber.i("## CrossSigning - Loading Self Signing key success")
} else {
Timber.w("## CrossSigning - Public Self Signing key does not match the private key")
// TODO untrust
}
}
}
}
} catch (e: Throwable) {
@ -365,7 +367,9 @@ internal class DefaultCrossSigningService @Inject constructor(
// Is the master key trusted
// 1) check if I know the private key
val masterPrivateKey = cryptoStore.getCrossSigningPrivateKeys()?.master
val masterPrivateKey = cryptoStore.getCrossSigningPrivateKeys()
?.master
?.fromBase64NoPadding()
var isMaterKeyTrusted = false
if (masterPrivateKey != null) {
@ -373,11 +377,12 @@ internal class DefaultCrossSigningService @Inject constructor(
var olmPkSigning: OlmPkSigning? = null
try {
olmPkSigning = OlmPkSigning()
val expectedPK = olmPkSigning.initWithSeed(Base64.decode(masterPrivateKey, Base64.NO_PADDING))
val expectedPK = olmPkSigning.initWithSeed(masterPrivateKey)
isMaterKeyTrusted = myMasterKey.unpaddedBase64PublicKey == expectedPK
} catch (failure: Throwable) {
olmPkSigning?.releaseSigning()
Timber.e(failure)
}
olmPkSigning?.releaseSigning()
} else {
// Maybe it's signed by a locally trusted device?
myMasterKey.signatures?.get(myUserId)?.forEach { (key, value) ->

8
matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/crosssigning/Extensions.kt
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@ -28,6 +28,10 @@ fun CryptoCrossSigningKey.canonicalSignable(): String {
return JsonCanonicalizer.getCanonicalJson(Map::class.java, signalableJSONDictionary())
}
fun ByteArray.toBase64NoPadding() : String? {
return Base64.encodeToString(this, Base64.NO_PADDING)
fun ByteArray.toBase64NoPadding(): String {
return Base64.encodeToString(this, Base64.NO_PADDING or Base64.NO_WRAP)
}
fun String.fromBase64NoPadding(): ByteArray {
return Base64.decode(this, Base64.NO_PADDING or Base64.NO_WRAP)
}

16
matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/store/PrivateKeysInfo.kt
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@ -1,3 +1,19 @@
/*
* Copyright 2020 New Vector Ltd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package im.vector.matrix.android.internal.crypto.store
data class PrivateKeysInfo(

29
matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/qrcode/SharedSecret.kt Normal file
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@ -0,0 +1,29 @@
/*
* Copyright 2020 New Vector Ltd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package im.vector.matrix.android.internal.crypto.verification.qrcode
import im.vector.matrix.android.internal.crypto.crosssigning.toBase64NoPadding
import java.security.SecureRandom
fun generateSharedSecret(): String {
val secureRandom = SecureRandom()
// 256 bits long
val secretBytes = ByteArray(32)
secureRandom.nextBytes(secretBytes)
return secretBytes.toBase64NoPadding()
}