diff options
Diffstat (limited to 'ready_se/google/keymint/KM200/Applet/src/com/android/javacard/keymaster/KMKeyCharacteristics.java')
-rw-r--r-- | ready_se/google/keymint/KM200/Applet/src/com/android/javacard/keymaster/KMKeyCharacteristics.java | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/ready_se/google/keymint/KM200/Applet/src/com/android/javacard/keymaster/KMKeyCharacteristics.java b/ready_se/google/keymint/KM200/Applet/src/com/android/javacard/keymaster/KMKeyCharacteristics.java new file mode 100644 index 0000000..37b8b7f --- /dev/null +++ b/ready_se/google/keymint/KM200/Applet/src/com/android/javacard/keymaster/KMKeyCharacteristics.java @@ -0,0 +1,124 @@ +/* + * Copyright(C) 2020 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.android.javacard.keymaster; + +import javacard.framework.ISO7816; +import javacard.framework.ISOException; +import javacard.framework.Util; + +/** + * KMKeyCharacteristics represents KeyCharacteristics structure from android keymaster hal + * specifications. It corresponds to CBOR array type. struct{byte KEY_CHAR_TYPE; short length=3; + * short arrayPtr} where arrayPtr is a pointer to ordered array with 1 or 3 following elements: + * {KMKeyParameters sb; KMKeyParameters tee; KMKeyParameters keystore} + */ +public class KMKeyCharacteristics extends KMType { + + public static final byte STRONGBOX_ENFORCED = 0x00; + public static final byte TEE_ENFORCED = 0x01; + public static final byte KEYSTORE_ENFORCED = 0x02; + private static KMKeyCharacteristics prototype; + + private KMKeyCharacteristics() {} + + public static short exp() { + short keyParamExp = KMKeyParameters.exp(); + short arrPtr = KMArray.instance((short) 3); + + KMArray arr = KMArray.cast(arrPtr); + arr.add(STRONGBOX_ENFORCED, keyParamExp); + arr.add(TEE_ENFORCED, keyParamExp); + arr.add(KEYSTORE_ENFORCED, keyParamExp); + return instance(arrPtr); + } + + private static KMKeyCharacteristics proto(short ptr) { + if (prototype == null) { + prototype = new KMKeyCharacteristics(); + } + KMType.instanceTable[KM_KEY_CHARACTERISTICS_OFFSET] = ptr; + return prototype; + } + + public static short instance() { + short arrPtr = KMArray.instance((short) 3); + return instance(arrPtr); + } + + public static short instance(short vals) { + short ptr = KMType.instance(KEY_CHAR_TYPE, (short) 3); + if (KMArray.cast(vals).length() != 3) { + ISOException.throwIt(ISO7816.SW_WRONG_LENGTH); + } + Util.setShort(heap, (short) (ptr + TLV_HEADER_SIZE), vals); + return ptr; + } + + public static KMKeyCharacteristics cast(short ptr) { + if (heap[ptr] != KEY_CHAR_TYPE) { + ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED); + } + short arrPtr = Util.getShort(heap, (short) (ptr + TLV_HEADER_SIZE)); + if (heap[arrPtr] != ARRAY_TYPE) { + ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED); + } + return proto(ptr); + } + + public short getVals() { + return Util.getShort( + heap, (short) (KMType.instanceTable[KM_KEY_CHARACTERISTICS_OFFSET] + TLV_HEADER_SIZE)); + } + + public short length() { + short arrPtr = getVals(); + return KMArray.cast(arrPtr).length(); + } + + public short getKeystoreEnforced() { + short arrPtr = getVals(); + return KMArray.cast(arrPtr).get(KEYSTORE_ENFORCED); + } + + public void setKeystoreEnforced(short ptr) { + KMKeyParameters.cast(ptr); + short arrPtr = getVals(); + KMArray.cast(arrPtr).add(KEYSTORE_ENFORCED, ptr); + } + + public short getTeeEnforced() { + short arrPtr = getVals(); + return KMArray.cast(arrPtr).get(TEE_ENFORCED); + } + + public void setTeeEnforced(short ptr) { + KMKeyParameters.cast(ptr); + short arrPtr = getVals(); + KMArray.cast(arrPtr).add(TEE_ENFORCED, ptr); + } + + public short getStrongboxEnforced() { + short arrPtr = getVals(); + return KMArray.cast(arrPtr).get(STRONGBOX_ENFORCED); + } + + public void setStrongboxEnforced(short ptr) { + KMKeyParameters.cast(ptr); + short arrPtr = getVals(); + KMArray.cast(arrPtr).add(STRONGBOX_ENFORCED, ptr); + } +} |