Val fileContent = "MY SUPER-SECRET INFORMATION" Val fileToWrite = "my_sensitive_data.txt" and the file name cannot contain path separators. Note that you cannot append to an existing file, Create a file with this name, or replace an entire existing file InputStream inputStream = encryptedFile.openFileInput() īyteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream() īyte plaintext = byteArrayOutputStream.toByteArray() String fileToRead = "my_sensitive_data.txt" ĮncryptedFile encryptedFile = new EncryptedFile.Builder( String mainKeyAlias = MasterKeys.getOrCreate(keyGenParameterSpec) KeyGenParameterSpec keyGenParameterSpec = MasterKeys.AES256_GCM_SPEC Val plaintext: ByteArray = byteArrayOutputStream.toByteArray()Ĭontext context = getApplicationContext() Val byteArrayOutputStream = ByteArrayOutputStream() Val inputStream = encryptedFile.openFileInput() Val encryptedFile = EncryptedFile.Builder(Į256_GCM_HKDF_4KB Val mainKeyAlias = MasterKeys.getOrCreate(keyGenParameterSpec) Val keyGenParameterSpec = MasterKeys.AES256_GCM_SPEC recommended that you use the value specified here. Although you can define your own key generation parameter specification, it's The following sections include snippets that demonstrates how you can completeĬommon cryptographic operations in your app. The library specifies a recommended encryption algorithm for you to use. Library to perform these actions in a more secure manner. Note: When reading and writing local files, your app can use the Security SHA-2 family with ECDSA (eg, SHA256withECDSA) Not require compatibility with a third-party system), we recommend using theĪES in either CBC or GCM mode with 256-bit keys (such as AES/GCM/NoPadding) When you have the freedom to choose which algorithm to use (such as when you do
System could cause compatibility problems in future releases. Specifying a provider without using the Android Keystore In other situations, however, Android doesn't guarantee a particular providerįor a given algorithm. If you're using the Android Keystore system, Specify a provider only with the Android Keystore system
Note: Except where specified, this advice applies to all Android versions. Security, use the Android Keystore system. This document describes the proper way to use Android's cryptographic facilitiesĪnd includes some examples of its use.
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