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Instantiate key signatures on demand

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Christian Grigis 2021-11-02 14:52:04 +01:00 committed by Marvin W
parent dd617e27b6
commit 9067f66f0c
1 changed files with 12 additions and 12 deletions
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24
play-services-nearby-core/src/main/kotlin/org/microg/gms/nearby/exposurenotification/ExposureNotificationServiceImpl.kt
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@ -48,14 +48,14 @@ class ExposureNotificationServiceImpl(private val context: Context, private val
// Table of back-end public keys, used to verify the signature of the diagnosed TEKs.
// The table is indexed by package names.
private val backendPubKeyForPackage = mapOf<String, String>(
Pair("ch.admin.bag.dp3t.dev",
"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEsFcEnOPY4AOAKkpv9HSdW2BrhUCWwL15Hpqu5zHaWy1Wno2KR8G6dYJ8QO0uZu1M6j8z6NGXFVZcpw7tYeXAqQ=="),
Pair("ch.admin.bag.dp3t.test",
"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEsFcEnOPY4AOAKkpv9HSdW2BrhUCWwL15Hpqu5zHaWy1Wno2KR8G6dYJ8QO0uZu1M6j8z6NGXFVZcpw7tYeXAqQ=="),
Pair("ch.admin.bag.dp3t.abnahme",
"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEsFcEnOPY4AOAKkpv9HSdW2BrhUCWwL15Hpqu5zHaWy1Wno2KR8G6dYJ8QO0uZu1M6j8z6NGXFVZcpw7tYeXAqQ=="),
Pair("ch.admin.bag.dp3t",
"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEK2k9nZ8guo7JP2ELPQXnUkqDyjjJmYmpt9Zy0HPsiGXCdI3SFmLr204KNzkuITppNV5P7+bXRxiiY04NMrEITg=="),
"ch.admin.bag.dp3t.dev" to
"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEsFcEnOPY4AOAKkpv9HSdW2BrhUCWwL15Hpqu5zHaWy1Wno2KR8G6dYJ8QO0uZu1M6j8z6NGXFVZcpw7tYeXAqQ==",
"ch.admin.bag.dp3t.test" to
"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEsFcEnOPY4AOAKkpv9HSdW2BrhUCWwL15Hpqu5zHaWy1Wno2KR8G6dYJ8QO0uZu1M6j8z6NGXFVZcpw7tYeXAqQ==",
"ch.admin.bag.dp3t.abnahme" to
"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEsFcEnOPY4AOAKkpv9HSdW2BrhUCWwL15Hpqu5zHaWy1Wno2KR8G6dYJ8QO0uZu1M6j8z6NGXFVZcpw7tYeXAqQ==",
"ch.admin.bag.dp3t" to
"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEK2k9nZ8guo7JP2ELPQXnUkqDyjjJmYmpt9Zy0HPsiGXCdI3SFmLr204KNzkuITppNV5P7+bXRxiiY04NMrEITg==",
)
// Back-end public key for this package
@ -70,9 +70,9 @@ class ExposureNotificationServiceImpl(private val context: Context, private val
// Table of supported signature algorithms for the diagnosed TEKs.
// The table is indexed by ASN.1 OIDs as specified in https://tools.ietf.org/html/rfc5758#section-3.2
private val sigAlgoForOid = mapOf<String, Signature>(
Pair("1.2.840.10045.4.3.2", Signature.getInstance("SHA256withECDSA")),
Pair("1.2.840.10045.4.3.4", Signature.getInstance("SHA512withECDSA")),
private val sigAlgoForOid = mapOf<String, Function0<Signature>>(
"1.2.840.10045.4.3.2" to { Signature.getInstance("SHA256withECDSA") },
"1.2.840.10045.4.3.4" to { Signature.getInstance("SHA512withECDSA") },
)
private fun LifecycleCoroutineScope.launchSafely(block: suspend CoroutineScope.() -> Unit): Job = launchWhenStarted { try { block() } catch (e: Exception) { Log.w(TAG, "Error in coroutine", e) } }
@ -481,7 +481,7 @@ class ExposureNotificationServiceImpl(private val context: Context, private val
Log.d(TAG, "Signature info: algo=${sigInfo.signature_algorithm} key={id=${sigInfo.verification_key_id}, version=${sigInfo.verification_key_version}}")
val signature = sig.signature?.toByteArray() ?: throw Exception("Signature contents is missing")
val sigVerifier = sigAlgoForOid.get(sigInfo.signature_algorithm) ?: throw Exception("Signature algorithm not supported: ${sigInfo.signature_algorithm}")
val sigVerifier = (sigAlgoForOid.get(sigInfo.signature_algorithm) ?: throw Exception("Signature algorithm not supported: ${sigInfo.signature_algorithm}"))()
sigVerifier.initVerify(backendPublicKey)
val stream = zip.getInputStream(dataEntry)