Android证书安装
z9722 人气:0一.证书在源码中的路径
5.1系统证书(命名是 openssl x509 -subject_hash_old -in filename)
libcore/luni/src/main/files/cacerts
7.1及以后系统证书
/system/ca-certificates/files
二.证书在固件中的路径
/system/etc/security/cacerts
三.手动安装流程
设置-->安全-->从SD卡安装证书:
在AndroidManif.xml里
<Preference android:key="credentials_install" android:title="@string/credentials_install" android:summary="@string/credentials_install_summary" android:persistent="false"> <intent android:action="android.credentials.INSTALL" android:targetPackage="com.android.certinstaller" android:targetClass="com.android.certinstaller.CertInstallerMain"/> </Preference>
packages/apps/CertInstaller
CertInstallerMain打开Document,选择证书文件,选择好后。启动CerInstaller
然后根据证书类型区分createPkcs12PasswordDialog和createNameCredentialDialog,看个简单的createNameCredentialDialog
try { startActivityForResult( mCredentials.createSystemInstallIntent(), //Intent intent = new Intent("com.android.credentials.INSTALL"); REQUEST_SYSTEM_INSTALL_CODE); } catch (ActivityNotFoundException e) { Log.w(TAG, "systemInstall(): " + e); toastErrorAndFinish(R.string.cert_not_saved); }
看intent,又到了Settings的CredentialStorage
Settings/src/com/android/settings/CredentialStorage.java installIfAvailable
添加证书:Settings/src/com/android/settings/CredentialStorage.java installIfAvailable()
删除证书:Settings/src/com/android/settings/TrustedCredentialsSettings.java AliasOperation#doInBackground
显示证书:Settings/src/com/android/settings/TrustedCredentialsSettings.java AdapterData#AliasLoader#doInBackground
证书内容:Settings/src/com/android/settings/TrustedCredentialsSettings.java CertHolder SslCertificate
安装类型两种: userKey和Ca证书(pk12要处理密码)
CertInstaller\src\com\android\certinstaller\CredentialHelper.java
异常码:
机器未设置密码锁
机器未解锁
锁屏方式不符合要求还是packages/apps/CertInstaller/CertInstallerMain,startActivityForResult结果回调
if (requestCode == REQUEST_SYSTEM_INSTALL_CODE) { if (resultCode == RESULT_OK) { Log.d(TAG, "credential is added: " + mCredentials.getName()); Toast.makeText(this, getString(R.string.cert_is_added, mCredentials.getName()), Toast.LENGTH_LONG).show(); if (mCredentials.hasCaCerts()) { // more work to do, don't finish just yet new InstallCaCertsToKeyChainTask().execute(); return; } setResult(RESULT_OK); } else { Log.d(TAG, "credential not saved, err: " + resultCode); toastErrorAndFinish(R.string.cert_not_saved); } }
如果是CaCerts,还要进行 new InstallCaCertsToKeyChainTask().execute() --> mCredentials.installCaCertsToKeyChain --> keyChainService.installCaCertificate
keyChainService实现在packages/apps/KeyChain mTrustedCertificateStore.installCertificate
external/conscrypt/src/platform/java/org/conscrypt/TrustedCertificateStore installCertificate --> writeCertificate
四.c层
system/security/keystore/keystore.cpp
添加证书 installIfAvailable -> mKeyStore.put -> mBinder.insert (这里还是java层)
-> KeyStoreProxy::insert -> KeyStore::put (这里getEncryptionKey用到一个AESkey,哪里来的?)
五.为什么要锁屏密码
以设置密码为例
Settings/src/com/android/settings/ChooseLockPassword.java mLockPatternUtils.saveLockPassword
frameworks/base/core/java/com/android/internal/widget/LockPatternUtils.java getLockSettings().setLockPassword
frameworks/base/services/core/java/com/android/server/LockSettingsService.java setLockPassword -> maybeUpdateKeystore -> ks.passwordUid
-> 到keystore.cpp的password_uid
password_uid 有三种状态,其中STATE_UNINITIALIZED和STATE_LOCKED都会调用setupMasterKeys,经锁屏密码设置AESkey
这里就解答了添加证书时的AESKey是哪来的
这个是基于Android5.1分析的,高版本可能文件名不同,但是知道大概位置,搜索下,应该没什么难度
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