1 files changed, 76 insertions, 0 deletions
diff --git a/ready_se/google/keymint/KM200/Applet/src/com/android/javacard/keymaster/KMCosePairSimpleValueTag.java b/ready_se/google/keymint/KM200/Applet/src/com/android/javacard/keymaster/KMCosePairSimpleValueTag.java
new file mode 100644
index 0000000..a0d7da8
--- /dev/null
+++ b/ready_se/google/keymint/KM200/Applet/src/com/android/javacard/keymaster/KMCosePairSimpleValueTag.java
@@ -0,0 +1,76 @@
+package com.android.javacard.keymaster;
+
+import javacard.framework.ISO7816;
+import javacard.framework.ISOException;
+import javacard.framework.Util;
+
+/**
+ * KMCosePairSimpleValueTag represents a key-value type, where key can be KMInteger or KMNInteger
+ * and value is KMSimpleValue type. struct{byte TAG_TYPE; short length; struct{short
+ * SIMPLE_VALUE_TYPE; short key; short value}}.
+ */
+public class KMCosePairSimpleValueTag extends KMCosePairTagType {
+
+  private static KMCosePairSimpleValueTag prototype;
+
+  private KMCosePairSimpleValueTag() {}
+
+  private static KMCosePairSimpleValueTag proto(short ptr) {
+    if (prototype == null) {
+      prototype = new KMCosePairSimpleValueTag();
+    }
+    instanceTable[KM_COSE_KEY_SIMPLE_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_SIMPLE_VALUE_TAG_TYPE);
+    Util.setShort(heap, (short) (ptr + TLV_HEADER_SIZE + 2), KMType.INVALID_VALUE);
+    Util.setShort(heap, (short) (ptr + TLV_HEADER_SIZE + 4), KMSimpleValue.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, KMSimpleValue.cast(valuePtr).getValue())) {
+      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_SIMPLE_VALUE_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 KMCosePairSimpleValueTag cast(short ptr) {
+    byte[] heap = repository.getHeap();
+    if (heap[ptr] != COSE_PAIR_TAG_TYPE) {
+      ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
+    }
+    // Validate the value pointer.
+    short valuePtr = Util.getShort(heap, (short) (ptr + TLV_HEADER_SIZE + 4));
+    if (KMType.getType(valuePtr) != SIMPLE_VALUE_TYPE) {
+      ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
+    }
+    return proto(ptr);
+  }
+
+  public short getValueType() {
+    return SIMPLE_VALUE_TYPE;
+  }
+
+  @Override
+  public short getKeyPtr() {
+    return Util.getShort(
+        heap, (short) (instanceTable[KM_COSE_KEY_SIMPLE_VAL_OFFSET] + TLV_HEADER_SIZE + 2));
+  }
+
+  @Override
+  public short getValuePtr() {
+    return Util.getShort(
+        heap, (short) (instanceTable[KM_COSE_KEY_SIMPLE_VAL_OFFSET] + TLV_HEADER_SIZE + 4));
+  }
+}