Examples with KeymasterArguments android.security.keymaster.KeymasterArguments used on opensource projects

Example 1 with KeymasterArguments

use of android.security.keymaster.KeymasterArguments in project platform_frameworks_base by android.

the class AndroidKeyStoreKeyGeneratorSpi method engineGenerateKey.

@Override
protected SecretKey engineGenerateKey() {
    KeyGenParameterSpec spec = mSpec;
    if (spec == null) {
        throw new IllegalStateException("Not initialized");
    }
    KeymasterArguments args = new KeymasterArguments();
    args.addUnsignedInt(KeymasterDefs.KM_TAG_KEY_SIZE, mKeySizeBits);
    args.addEnum(KeymasterDefs.KM_TAG_ALGORITHM, mKeymasterAlgorithm);
    args.addEnums(KeymasterDefs.KM_TAG_PURPOSE, mKeymasterPurposes);
    args.addEnums(KeymasterDefs.KM_TAG_BLOCK_MODE, mKeymasterBlockModes);
    args.addEnums(KeymasterDefs.KM_TAG_PADDING, mKeymasterPaddings);
    args.addEnums(KeymasterDefs.KM_TAG_DIGEST, mKeymasterDigests);
    KeymasterUtils.addUserAuthArgs(args, spec.isUserAuthenticationRequired(), spec.getUserAuthenticationValidityDurationSeconds(), spec.isUserAuthenticationValidWhileOnBody(), spec.isInvalidatedByBiometricEnrollment());
    KeymasterUtils.addMinMacLengthAuthorizationIfNecessary(args, mKeymasterAlgorithm, mKeymasterBlockModes, mKeymasterDigests);
    args.addDateIfNotNull(KeymasterDefs.KM_TAG_ACTIVE_DATETIME, spec.getKeyValidityStart());
    args.addDateIfNotNull(KeymasterDefs.KM_TAG_ORIGINATION_EXPIRE_DATETIME, spec.getKeyValidityForOriginationEnd());
    args.addDateIfNotNull(KeymasterDefs.KM_TAG_USAGE_EXPIRE_DATETIME, spec.getKeyValidityForConsumptionEnd());
    if (((spec.getPurposes() & KeyProperties.PURPOSE_ENCRYPT) != 0) && (!spec.isRandomizedEncryptionRequired())) {
        // Permit caller-provided IV when encrypting with this key
        args.addBoolean(KeymasterDefs.KM_TAG_CALLER_NONCE);
    }
    byte[] additionalEntropy = KeyStoreCryptoOperationUtils.getRandomBytesToMixIntoKeystoreRng(mRng, (mKeySizeBits + 7) / 8);
    int flags = 0;
    String keyAliasInKeystore = Credentials.USER_SECRET_KEY + spec.getKeystoreAlias();
    KeyCharacteristics resultingKeyCharacteristics = new KeyCharacteristics();
    boolean success = false;
    try {
        Credentials.deleteAllTypesForAlias(mKeyStore, spec.getKeystoreAlias(), spec.getUid());
        int errorCode = mKeyStore.generateKey(keyAliasInKeystore, args, additionalEntropy, spec.getUid(), flags, resultingKeyCharacteristics);
        if (errorCode != KeyStore.NO_ERROR) {
            throw new ProviderException("Keystore operation failed", KeyStore.getKeyStoreException(errorCode));
        }
        @KeyProperties.KeyAlgorithmEnum String keyAlgorithmJCA;
        try {
            keyAlgorithmJCA = KeyProperties.KeyAlgorithm.fromKeymasterSecretKeyAlgorithm(mKeymasterAlgorithm, mKeymasterDigest);
        } catch (IllegalArgumentException e) {
            throw new ProviderException("Failed to obtain JCA secret key algorithm name", e);
        }
        SecretKey result = new AndroidKeyStoreSecretKey(keyAliasInKeystore, spec.getUid(), keyAlgorithmJCA);
        success = true;
        return result;
    } finally {
        if (!success) {
            Credentials.deleteAllTypesForAlias(mKeyStore, spec.getKeystoreAlias(), spec.getUid());
        }
    }
}

Example 2 with KeymasterArguments

use of android.security.keymaster.KeymasterArguments in project platform_frameworks_base by android.

the class KeyStoreTest method testAppId.

public void testAppId() throws Exception {
    String name = "test";
    byte[] id = new byte[] { 0x01, 0x02, 0x03 };
    KeymasterArguments args = new KeymasterArguments();
    args.addEnum(KeymasterDefs.KM_TAG_PURPOSE, KeymasterDefs.KM_PURPOSE_ENCRYPT);
    args.addEnum(KeymasterDefs.KM_TAG_PURPOSE, KeymasterDefs.KM_PURPOSE_DECRYPT);
    args.addEnum(KeymasterDefs.KM_TAG_ALGORITHM, KeymasterDefs.KM_ALGORITHM_RSA);
    args.addEnum(KeymasterDefs.KM_TAG_PADDING, KeymasterDefs.KM_PAD_NONE);
    args.addUnsignedInt(KeymasterDefs.KM_TAG_KEY_SIZE, 2048);
    args.addEnum(KeymasterDefs.KM_TAG_BLOCK_MODE, KeymasterDefs.KM_MODE_ECB);
    args.addBoolean(KeymasterDefs.KM_TAG_NO_AUTH_REQUIRED);
    args.addBytes(KeymasterDefs.KM_TAG_APPLICATION_ID, id);
    args.addUnsignedLong(KeymasterDefs.KM_TAG_RSA_PUBLIC_EXPONENT, RSAKeyGenParameterSpec.F4);
    KeyCharacteristics outCharacteristics = new KeyCharacteristics();
    int result = mKeyStore.generateKey(name, args, null, 0, outCharacteristics);
    assertEquals("generateRsaKey should succeed", KeyStore.NO_ERROR, result);
    assertEquals("getKeyCharacteristics should fail without application ID", KeymasterDefs.KM_ERROR_INVALID_KEY_BLOB, mKeyStore.getKeyCharacteristics(name, null, null, outCharacteristics));
    assertEquals("getKeyCharacteristics should succeed with application ID", KeyStore.NO_ERROR, mKeyStore.getKeyCharacteristics(name, new KeymasterBlob(id), null, outCharacteristics));
}

Example 3 with KeymasterArguments

use of android.security.keymaster.KeymasterArguments in project platform_frameworks_base by android.

the class KeyStoreTest method importAesKey.

private int importAesKey(String name, byte[] key, int size, int mode) {
    KeymasterArguments args = new KeymasterArguments();
    args.addEnum(KeymasterDefs.KM_TAG_PURPOSE, KeymasterDefs.KM_PURPOSE_ENCRYPT);
    args.addEnum(KeymasterDefs.KM_TAG_PURPOSE, KeymasterDefs.KM_PURPOSE_DECRYPT);
    args.addEnum(KeymasterDefs.KM_TAG_ALGORITHM, KeymasterDefs.KM_ALGORITHM_AES);
    args.addEnum(KeymasterDefs.KM_TAG_PADDING, KeymasterDefs.KM_PAD_NONE);
    args.addEnum(KeymasterDefs.KM_TAG_BLOCK_MODE, mode);
    args.addUnsignedInt(KeymasterDefs.KM_TAG_KEY_SIZE, size);
    args.addBoolean(KeymasterDefs.KM_TAG_NO_AUTH_REQUIRED);
    return mKeyStore.importKey(name, args, KeymasterDefs.KM_KEY_FORMAT_RAW, key, 0, new KeyCharacteristics());
}

Example 4 with KeymasterArguments

use of android.security.keymaster.KeymasterArguments in project platform_frameworks_base by android.

the class KeyStoreTest method testGenerateRsaWithEntropy.

public void testGenerateRsaWithEntropy() throws Exception {
    byte[] entropy = new byte[] { 1, 2, 3, 4, 5 };
    String name = "test";
    KeymasterArguments args = new KeymasterArguments();
    args.addEnum(KeymasterDefs.KM_TAG_PURPOSE, KeymasterDefs.KM_PURPOSE_ENCRYPT);
    args.addEnum(KeymasterDefs.KM_TAG_PURPOSE, KeymasterDefs.KM_PURPOSE_DECRYPT);
    args.addEnum(KeymasterDefs.KM_TAG_ALGORITHM, KeymasterDefs.KM_ALGORITHM_RSA);
    args.addEnum(KeymasterDefs.KM_TAG_PADDING, KeymasterDefs.KM_PAD_NONE);
    args.addBoolean(KeymasterDefs.KM_TAG_NO_AUTH_REQUIRED);
    args.addUnsignedInt(KeymasterDefs.KM_TAG_KEY_SIZE, 2048);
    args.addUnsignedLong(KeymasterDefs.KM_TAG_RSA_PUBLIC_EXPONENT, RSAKeyGenParameterSpec.F4);
    KeyCharacteristics outCharacteristics = new KeyCharacteristics();
    int result = mKeyStore.generateKey(name, args, entropy, 0, outCharacteristics);
    assertEquals("generateKey should succeed", KeyStore.NO_ERROR, result);
}

Example 5 with KeymasterArguments

use of android.security.keymaster.KeymasterArguments in project platform_frameworks_base by android.

the class KeyStoreTest method testOperationPruning.

// This is a very implementation specific test and should be thrown out eventually, however it
// is nice for now to test that keystore is properly pruning operations.
public void testOperationPruning() throws Exception {
    String name = "test";
    KeymasterArguments args = new KeymasterArguments();
    args.addEnum(KeymasterDefs.KM_TAG_PURPOSE, KeymasterDefs.KM_PURPOSE_ENCRYPT);
    args.addEnum(KeymasterDefs.KM_TAG_PURPOSE, KeymasterDefs.KM_PURPOSE_DECRYPT);
    args.addEnum(KeymasterDefs.KM_TAG_ALGORITHM, KeymasterDefs.KM_ALGORITHM_AES);
    args.addEnum(KeymasterDefs.KM_TAG_PADDING, KeymasterDefs.KM_PAD_NONE);
    args.addUnsignedInt(KeymasterDefs.KM_TAG_KEY_SIZE, 256);
    args.addEnum(KeymasterDefs.KM_TAG_BLOCK_MODE, KeymasterDefs.KM_MODE_CTR);
    args.addBoolean(KeymasterDefs.KM_TAG_NO_AUTH_REQUIRED);
    KeyCharacteristics outCharacteristics = new KeyCharacteristics();
    int rc = mKeyStore.generateKey(name, args, null, 0, outCharacteristics);
    assertEquals("Generate should succeed", KeyStore.NO_ERROR, rc);
    args = new KeymasterArguments();
    args.addEnum(KeymasterDefs.KM_TAG_ALGORITHM, KeymasterDefs.KM_ALGORITHM_AES);
    args.addEnum(KeymasterDefs.KM_TAG_BLOCK_MODE, KeymasterDefs.KM_MODE_CTR);
    args.addEnum(KeymasterDefs.KM_TAG_PADDING, KeymasterDefs.KM_PAD_NONE);
    OperationResult result = mKeyStore.begin(name, KeymasterDefs.KM_PURPOSE_ENCRYPT, true, args, null);
    assertEquals("Begin should succeed", KeyStore.NO_ERROR, result.resultCode);
    IBinder first = result.token;
    // Implementation detail: softkeymaster supports 16 concurrent operations
    for (int i = 0; i < 16; i++) {
        result = mKeyStore.begin(name, KeymasterDefs.KM_PURPOSE_ENCRYPT, true, args, null);
        assertEquals("Begin should succeed", KeyStore.NO_ERROR, result.resultCode);
    }
    // At this point the first operation should be pruned.
    assertEquals("Operation should be pruned", KeymasterDefs.KM_ERROR_INVALID_OPERATION_HANDLE, mKeyStore.update(first, null, new byte[] { 0x01 }).resultCode);
}