AndroidKeyStore KeyPairGenerator 在少量设备上崩溃

Question

我的应用程序仅针对 Android 6.0+。在我的应用程序中，我使用以下内容在

AndroidKeyStore

中生成 RSA 密钥：

KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA", "AndroidKeyStore");
kpg.initialize(new KeyGenParameterSpec.Builder(
    "myKey", KeyProperties.PURPOSE_ENCRYPT | KeyProperties.PURPOSE_DECRYPT)
    .setCertificateSubject(new X500Principal("CN=myKey"))
    .setDigests("SHA-1")
    .setEncryptionPaddings("OAEPPadding")
    .build());

KeyPair kp = kpg.generateKeyPair();

这在我们测试过的 20 多种设备以及近 100% 的用户上运行良好。

但是，当使用以下命令执行

kpg.generateKeyPair()

时，有少数用户该应用程序崩溃：

java.security.ProviderException: Failed to load generated key pair from keystore
at android.security.keystore.AndroidKeyStoreKeyPairGeneratorSpi.loadKeystoreKeyPair(AndroidKeyStoreKeyPairGeneratorSpi.java:518)
at android.security.keystore.AndroidKeyStoreKeyPairGeneratorSpi.generateKeyPair(AndroidKeyStoreKeyPairGeneratorSpi.java:470)
at java.security.KeyPairGenerator$Delegate.generateKeyPair(KeyPairGenerator.java:699)
at md5fb78b69c5ddbc157f4db38fd738139a6.MainApplication.n_onCreate(Native Method)
at md5fb78b69c5ddbc157f4db38fd738139a6.MainApplication.onCreate(MainApplication.java:34)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1025)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5448)
at android.app.ActivityThread.-wrap2(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1564)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6186)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)
Caused by: java.security.UnrecoverableKeyException: Failed to obtain X.509 form of public key
at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStorePublicKeyFromKeystore(AndroidKeyStoreProvider.java:230)
at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStoreKeyPairFromKeystore(AndroidKeyStoreProvider.java:259)
at android.security.keystore.AndroidKeyStoreKeyPairGeneratorSpi.loadKeystoreKeyPair(AndroidKeyStoreKeyPairGeneratorSpi.java:509)
... 14 more
Caused by: android.security.KeyStoreException: -22
at android.security.KeyStore.getKeyStoreException(KeyStore.java:676)
at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStorePublicKeyFromKeystore(AndroidKeyStoreProvider.java:231)
... 16 more


java.security.UnrecoverableKeyException: Failed to obtain X.509 form of public key
at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStorePublicKeyFromKeystore(AndroidKeyStoreProvider.java:230)
at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStoreKeyPairFromKeystore(AndroidKeyStoreProvider.java:259)
at android.security.keystore.AndroidKeyStoreKeyPairGeneratorSpi.loadKeystoreKeyPair(AndroidKeyStoreKeyPairGeneratorSpi.java:509)
at android.security.keystore.AndroidKeyStoreKeyPairGeneratorSpi.generateKeyPair(AndroidKeyStoreKeyPairGeneratorSpi.java:470)
at java.security.KeyPairGenerator$Delegate.generateKeyPair(KeyPairGenerator.java:699)
at md5fb78b69c5ddbc157f4db38fd738139a6.MainApplication.n_onCreate(Native Method)
at md5fb78b69c5ddbc157f4db38fd738139a6.MainApplication.onCreate(MainApplication.java:34)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1025)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5448)
at android.app.ActivityThread.-wrap2(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1564)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6186)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)
Caused by: android.security.KeyStoreException: -22
at android.security.KeyStore.getKeyStoreException(KeyStore.java:676)
at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStorePublicKeyFromKeystore(AndroidKeyStoreProvider.java:231)
... 16 more


android.security.KeyStoreException: -22
at android.security.KeyStore.getKeyStoreException(KeyStore.java:676)
at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStorePublicKeyFromKeystore(AndroidKeyStoreProvider.java:231)
at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStoreKeyPairFromKeystore(AndroidKeyStoreProvider.java:259)
at android.security.keystore.AndroidKeyStoreKeyPairGeneratorSpi.loadKeystoreKeyPair(AndroidKeyStoreKeyPairGeneratorSpi.java:509)
at android.security.keystore.AndroidKeyStoreKeyPairGeneratorSpi.generateKeyPair(AndroidKeyStoreKeyPairGeneratorSpi.java:470)
at java.security.KeyPairGenerator$Delegate.generateKeyPair(KeyPairGenerator.java:699)
at md5fb78b69c5ddbc157f4db38fd738139a6.MainApplication.n_onCreate(Native Method)
at md5fb78b69c5ddbc157f4db38fd738139a6.MainApplication.onCreate(MainApplication.java:34)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1025)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5448)
at android.app.ActivityThread.-wrap2(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1564)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6186)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)

我在互联网上能找到的关于这个

Failed to obtain X.509 form of public key

错误的唯一内容是一些没有真正解决方案的文章。参见：

• https://github.com/AzureAD/azure-activedirectory-library-for-android/issues/740
• https://jira.lineageos.org/browse/BUGBASH-454

我们收到的少数报告来自使用运行 Android 7.1 的 OnePlus 设备的用户，这也是上述文章中提到的设备之一，但肯定还有其他设备受到影响。

• 为什么会出现这种情况？
• 有什么解决办法吗？

Answer 1

你一定要尝试一下这个...

• "SHA-256"

  而不是

  "SHA-1"

setDigests("SHA-256")

Answer 2

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