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Diffstat (limited to 'ready_se/google/keymint/KM300/Applet/src/com/android/javacard/keymaster/KMCosePairIntegerTag.java')
-rw-r--r--ready_se/google/keymint/KM300/Applet/src/com/android/javacard/keymaster/KMCosePairIntegerTag.java92
1 files changed, 92 insertions, 0 deletions
diff --git a/ready_se/google/keymint/KM300/Applet/src/com/android/javacard/keymaster/KMCosePairIntegerTag.java b/ready_se/google/keymint/KM300/Applet/src/com/android/javacard/keymaster/KMCosePairIntegerTag.java
new file mode 100644
index 0000000..ea052a6
--- /dev/null
+++ b/ready_se/google/keymint/KM300/Applet/src/com/android/javacard/keymaster/KMCosePairIntegerTag.java
@@ -0,0 +1,92 @@
+/*
+ * Copyright(C) 2021 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;
+
+/**
+ * KMCosePairIntegerTag represents a key-value type, where key can be KMInteger or KMNInteger and
+ * value is KMInteger type. struct{byte TAG_TYPE; short length; struct{short INT_VALUE_TYPE; short
+ * key; short value}}.
+ */
+public class KMCosePairIntegerTag extends KMCosePairTagType {
+
+ private static KMCosePairIntegerTag prototype;
+
+ private KMCosePairIntegerTag() {}
+
+ private static KMCosePairIntegerTag proto(short ptr) {
+ if (prototype == null) {
+ prototype = new KMCosePairIntegerTag();
+ }
+ instanceTable[KM_COSE_KEY_INT_VAL_OFFSET] = ptr;
+ return prototype;
+ }
+
+ // pointer to an empty instance used as expression
+ public static short exp() {
+ short ptr = instance(COSE_PAIR_TAG_TYPE, (short) 6);
+ Util.setShort(heap, (short) (ptr + TLV_HEADER_SIZE), KMType.COSE_PAIR_INT_TAG_TYPE);
+ Util.setShort(heap, (short) (ptr + TLV_HEADER_SIZE + 2), KMType.INVALID_VALUE);
+ Util.setShort(heap, (short) (ptr + TLV_HEADER_SIZE + 4), KMInteger.exp());
+ return ptr;
+ }
+
+ public static short instance(short keyPtr, short valuePtr) {
+ short offset = KMCosePairTagType.getKeyStartOffset(keyPtr);
+ if (!KMCosePairTagType.isKeyPairValid(
+ heap, offset, KMCose.COSE_KEY_MAX_SIZE, KMInteger.cast(valuePtr).getShort())) {
+ ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
+ }
+ short ptr = KMType.instance(COSE_PAIR_TAG_TYPE, (short) 6);
+ Util.setShort(heap, (short) (ptr + TLV_HEADER_SIZE), KMType.COSE_PAIR_INT_TAG_TYPE);
+ Util.setShort(heap, (short) (ptr + TLV_HEADER_SIZE + 2), keyPtr);
+ Util.setShort(heap, (short) (ptr + TLV_HEADER_SIZE + 4), valuePtr);
+ return ptr;
+ }
+
+ public static KMCosePairIntegerTag cast(short ptr) {
+ byte[] heap = repository.getHeap();
+ if (heap[ptr] != COSE_PAIR_TAG_TYPE) {
+ ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
+ }
+ // Validate the value ptr.
+ short valuePtr = Util.getShort(heap, (short) (ptr + TLV_HEADER_SIZE + 4));
+ if (INTEGER_TYPE != getType(valuePtr)) {
+ ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
+ }
+ return proto(ptr);
+ }
+
+ public short getValueType() {
+ return INTEGER_TYPE;
+ }
+
+ @Override
+ public short getKeyPtr() {
+ return Util.getShort(
+ heap, (short) (instanceTable[KM_COSE_KEY_INT_VAL_OFFSET] + TLV_HEADER_SIZE + 2));
+ }
+
+ @Override
+ public short getValuePtr() {
+ return Util.getShort(
+ heap, (short) (instanceTable[KM_COSE_KEY_INT_VAL_OFFSET] + TLV_HEADER_SIZE + 4));
+ }
+}