我正在使用AndroidKeystore生成RSA密钥对,并使用该密钥对进行加密和解密
我的密钥对生成代码如下:
var keypairGen:KeyPairGenerator = KeyPairGenerator.getInstance(KeyProperties.KEY_ALGORITHM_RSA, "AndroidKeyStore")
var keyPairGeneratorSpec: KeyGenParameterSpec = KeyGenParameterSpec
.Builder(this.Key_Name, KeyProperties.PURPOSE_ENCRYPT or KeyProperties.PURPOSE_DECRYPT)
.setDigests(KeyProperties.DIGEST_SHA256, KeyProperties.DIGEST_SHA512)
.setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_RSA_PKCS1)
.setRandomizedEncryptionRequired(false)
.build()
keypairGen.initialize(keyPairGeneratorSpec, SecureRandom())
keypairGen.genKeyPair()
我的加密代码看起来像
val keyStore:KeyStore = KeyStore.getInstance("AndroidKeyStore")
keyStore.load(null)
val String:String = "Test_String"
val publicKey:PublicKey = keyStore.getCertificate(this.Key_Name).publicKey
val privateKeyEntry:KeyStore.PrivateKeyEntry = keyStore.getEntry(this.Key_Name,null) as KeyStore.PrivateKeyEntry
val privateKey:PrivateKey = privateKeyEntry.privateKey
val cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding")
cipher.init(Cipher.ENCRYPT_MODE,publicKey)
val encryptedByte = cipher.doFinal(privateKeyString.toByteArray())
val stringEncrypt:String = Base64.encodeToString(encryptedByte,Base64.DEFAULT)
还有我的解密代码
val cipher1=Cipher.getInstance("RSA/ECB/PKCS1Padding")
cipher1.init(Cipher.DECRYPT_MODE, privateKey);
val decryptedBytes = cipher1.doFinal(Base64.decode(stringEncrypt,Base64.DEFAULT));
val decrypted = String(decryptedBytes);
但是当我运行此加密时,工作正常,但是在解密中出现以下错误
java.lang.RuntimeException: Unable to create service com.example.myapplication.service.Myservice: java.security.InvalidKeyException: Keystore operation failed
at android.app.ActivityThread.handleCreateService(ActivityThread.java:3201)
at android.app.ActivityThread.-wrap5(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1567)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.security.InvalidKeyException: Keystore operation failed
at android.security.KeyStore.getInvalidKeyException(KeyStore.java:727)
at android.security.KeyStore.getInvalidKeyException(KeyStore.java:748)
at android.security.keystore.KeyStoreCryptoOperationUtils.getInvalidKeyExceptionForInit(KeyStoreCryptoOperationUtils.java:54)
at android.security.keystore.KeyStoreCryptoOperationUtils.getExceptionForCipherInit(KeyStoreCryptoOperationUtils.java:89)
at android.security.keystore.AndroidKeyStoreCipherSpiBase.ensureKeystoreOperationInitialized(AndroidKeyStoreCipherSpiBase.java:265)
at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineInit(AndroidKeyStoreCipherSpiBase.java:109)
at javax.crypto.Cipher.tryTransformWithProvider(Cipher.java:2977)
at javax.crypto.Cipher.tryCombinations(Cipher.java:2884)
at javax.crypto.Cipher$SpiAndProviderUpdater.updateAndGetSpiAndProvider(Cipher.java:2789)
at javax.crypto.Cipher.chooseProvider(Cipher.java:956)
at javax.crypto.Cipher.init(Cipher.java:1199)
at javax.crypto.Cipher.init(Cipher.java:1143)
at com.example.myapplication.component.Component.encryptKey(Component.kt:82)
at com.example.myapplication.service.Myservice.keypairGenerator(Myservice.kt:92)
at com.example.myapplication.service.Myservice.onCreate(Myservice.kt:55)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:3191)
at android.app.ActivityThread.-wrap5(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1567)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: android.security.KeyStoreException: Incompatible padding mode
at android.security.KeyStore.getKeyStoreException(KeyStore.java:666)
at android.security.KeyStore.getInvalidKeyException(KeyStore.java:748)
at android.security.keystore.KeyStoreCryptoOperationUtils.getInvalidKeyExceptionForInit(KeyStoreCryptoOperationUtils.java:54)
at android.security.keystore.KeyStoreCryptoOperationUtils.getExceptionForCipherInit(KeyStoreCryptoOperationUtils.java:89)
at android.security.keystore.AndroidKeyStoreCipherSpiBase.ensureKeystoreOperationInitialized(AndroidKeyStoreCipherSpiBase.java:265)
at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineInit(AndroidKeyStoreCipherSpiBase.java:109)
at javax.crypto.Cipher.tryTransformWithProvider(Cipher.java:2977)
at javax.crypto.Cipher.tryCombinations(Cipher.java:2884)
at javax.crypto.Cipher$SpiAndProviderUpdater.updateAndGetSpiAndProvider(Cipher.java:2789)
at javax.crypto.Cipher.chooseProvider(Cipher.java:956)
at javax.crypto.Cipher.init(Cipher.java:1199)
at javax.crypto.Cipher.init(Cipher.java:1143)
at com.example.myapplication.component.Component.encryptKey(Component.kt:82)
at com.example.myapplication.service.Myservice.keypairGenerator(Myservice.kt:92)
at com.example.myapplication.service.Myservice.onCreate(Myservice.kt:55)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:3191)
at android.app.ActivityThread.-wrap5(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1567)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
请帮我解决这个问题。我尝试了大多数填充和摘要的组合。
答案 0 :(得分:0)
在解密之前尝试放置
stringEncrypt = stringEncrypt.replace("/n","");
val decryptedBytes = cipher1.doFinal(Base64.decode(stringEncrypt,Base64.DEFAULT));
val decrypted = String(decryptedBytes);
如果您的密钥太长,则密钥是错误的,或者是Base64编码正在添加内容。因此看到大小不匹配。