PhotoCardImplpublic class PhotoCardImpl extends CardRemoteObject implements PhotoCard
| Fields Summary |
|---|
| private Object[] | photos | | private boolean[] | photoReady | | private byte[] | buffer |
| Constructors Summary |
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PhotoCardImpl()
super(); // export it
// Initialize here
photos = new Object[(short)MAX_PHOTO_COUNT];
photoReady = new boolean[(short)MAX_PHOTO_COUNT];
buffer = new byte[(short)MAX_BUFFER_BYTES];
for (short i = (short)0; i < (short)MAX_PHOTO_COUNT; i++) {
photoReady[i] = false;
}
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| Methods Summary |
|---|
| private short | compare(byte[] src, byte[] destination, short photoOffset, short length)
try {
if (length != (short)32){
ISOException.throwIt( FAIL4 );
}
short comp = Util.arrayCompare(src, (short)0,
destination, photoOffset, length);
if(comp == 0){
return (short)0;
}
else{
return (short) FAIL1;
}
}
catch( CryptoException e ){
return FAIL3;
}
| | public void | deletePhoto(short photoID)
if (photoID > (short)MAX_PHOTO_COUNT) {
UserException.throwIt(PhotoCard.INVALID_PHOTO_ID);
}
byte[] thePhoto = (byte[])photos[(short)(photoID - (short)1)];
if (thePhoto != null) {
thePhoto = null;
JCSystem.requestObjectDeletion();
photoReady[(short)(photoID - (short)1)] = false;
} else {
UserException.throwIt(PhotoCard.NO_PHOTO_STORED);
}
| | public byte[] | getPhoto(short photoID, short offset, short size)
if (photoID > (short)MAX_PHOTO_COUNT) {
UserException.throwIt(PhotoCard.INVALID_PHOTO_ID);
}
byte[] selPhoto = (byte[])photos[(short)(photoID - (short)1)];
if ((selPhoto == null) || (photoReady[(short)(photoID - (short)1)] == false)) {
UserException.throwIt(PhotoCard.NO_PHOTO_STORED);
}
if (((short)(offset + size)) > selPhoto.length) {
UserException.throwIt(PhotoCard.INVALID_ARGUMENT);
}
Util.arrayCopy(selPhoto, offset, buffer, (short)0, size);
return buffer;
| | public short | getPhotoSize(short photoID)
if (photoID > (short)MAX_PHOTO_COUNT) {
UserException.throwIt(PhotoCard.INVALID_PHOTO_ID);
}
byte[] thePhoto = (byte[])photos[(short)(photoID - (short)1)];
if (thePhoto != null) {
return (short)(thePhoto.length);
} else {
return (short)0;
}
| | public void | loadPhoto(short photoID, byte[] data, short size, short offset, boolean more)
if (photoID > (short)MAX_PHOTO_COUNT) {
UserException.throwIt(PhotoCard.INVALID_PHOTO_ID);
}
byte[] selPhoto = (byte[])photos[(short)(photoID - (short)1)];
if (selPhoto == null) {
UserException.throwIt(PhotoCard.NO_PHOTO_STORED);
}
if (((short)(offset + size)) > selPhoto.length) {
UserException.throwIt(PhotoCard.INVALID_ARGUMENT);
}
Util.arrayCopy(data, (short)0, selPhoto, offset, size);
if (more == false) {
photoReady[(short)(photoID - (short)1)] = true;
}
| | public short | requestPhotoStorage(short size)
// 16-byte safety factor. For object header.
if (JCSystem.getAvailableMemory(JCSystem.MEMORY_TYPE_PERSISTENT) <
(short)(size + (short)16) ) {
UserException.throwIt(NO_SPACE_AVAILABLE);
}
for (short i = (short)0; i < (short)MAX_PHOTO_COUNT;i++) {
byte[] thePhoto = (byte[])photos[i];
if (photos[i] == null) {
photos[i] = new byte[size];
return (short)(i + 1);
}
}
UserException.throwIt(NO_SPACE_AVAILABLE);
// Compiler requires this unreachable statement
return (short)(-1);
| | public short | verifyPhoto(short photoID, byte[] photoDigest, short photoOffset)
MessageDigest md = null;
short response;
if(photoOffset > (short) photoDigest.length){
UserException.throwIt(PhotoCard.INVALID_OFFSET);
}
if (photoID > (short)MAX_PHOTO_COUNT) {
UserException.throwIt(PhotoCard.INVALID_PHOTO_ID);
}
byte[] selPhoto = (byte[])photos[(short)(photoID - (short)1)];
if ((selPhoto == null) || (photoReady[(short)(photoID - (short)1)] == false)) {
UserException.throwIt(PhotoCard.NO_PHOTO_STORED);
}
try
{
md = MessageDigest.getInstance(MessageDigest.ALG_SHA_256,false);
}catch(CryptoException e) {
UserException.throwIt(PhotoCard.DOES_NOT_SUPPORT_PHOTO_VERIFICTAION);
}
short resultLength = md.doFinal(selPhoto,(short) 0, (short) selPhoto.length,
buffer,(short)0);
response = compare(buffer,photoDigest,photoOffset,resultLength);
return response;
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