| Methods Summary |
|---|
| public boolean | cannotCloseSequence()Return true if the end of the current sequence is not reached.
When this method returns false, closeSequence can (and must) be
invoked.
return (next < stackBuf[stackTop - 1]) ;
|
| public void | closeSequence()Close a sequence.
The decode pull the stack and verifies that the current position
matches with the calculated end of the sequence. If not it throws
an exception.
if (stackBuf[stackTop - 1] == next) {
stackTop-- ;
}
else {
throw new BerException() ;
}
|
| public byte[] | fetchAny()Fetch an ANY value. In fact, this method does not decode anything
it simply returns the next TLV as an array of bytes.
byte[] result = null ;
final int backup = next ;
try {
final int tag = fetchTag() ;
final int contentLength = fetchLength() ;
if (contentLength < 0) throw new BerException() ;
final int tlvLength = next + contentLength - backup ;
if (contentLength > (bytes.length - next))
throw new IndexOutOfBoundsException("Decoded length exceeds buffer");
final byte[] data = new byte[tlvLength] ;
java.lang.System.arraycopy(bytes,backup,data,0,tlvLength);
// for (int i = 0 ; i < tlvLength ; i++) {
// data[i] = bytes[backup + i] ;
// }
next = next + contentLength ;
result = data;
}
catch(IndexOutOfBoundsException e) {
next = backup ;
throw new BerException() ;
}
// catch(Error e) {
// debug("fetchAny: Error decoding BER: " + e);
// throw e;
// }
return result ;
|
| public byte[] | fetchAny(int tag)Fetch an ANY value with a specific tag.
if (getTag() != tag) {
throw new BerException() ;
}
return fetchAny() ;
|
| public int | fetchInteger()Fetch an integer.
return fetchInteger(IntegerTag) ;
|
| public int | fetchInteger(int tag)Fetch an integer with the specified tag.
int result = 0 ;
final int backup = next ;
try {
if (fetchTag() != tag) {
throw new BerException() ;
}
result = fetchIntegerValue() ;
}
catch(BerException e) {
next = backup ;
throw e ;
}
return result ;
|
| public long | fetchIntegerAsLong()Fetch an integer and return a long value.
return fetchIntegerAsLong(IntegerTag) ;
|
| public long | fetchIntegerAsLong(int tag)Fetch an integer with the specified tag and return a long value.
long result = 0 ;
final int backup = next ;
try {
if (fetchTag() != tag) {
throw new BerException() ;
}
result = fetchIntegerValueAsLong() ;
}
catch(BerException e) {
next = backup ;
throw e ;
}
return result ;
|
| private int | fetchIntegerValue()Fetch an integer value and move the current position forward.
int result = 0 ;
final int backup = next ;
try {
final int length = fetchLength() ;
if (length <= 0) throw new BerException() ;
if (length > (bytes.length - next)) throw
new IndexOutOfBoundsException("Decoded length exceeds buffer");
final int end = next + length ;
result = bytes[next++] ;
while (next < end) {
final byte b = bytes[next++] ;
if (b < 0) {
result = (result << 8) | (256 + b) ;
}
else {
result = (result << 8) | b ;
}
}
}
catch(BerException e) {
next = backup ;
throw e ;
}
catch(IndexOutOfBoundsException e) {
next = backup ;
throw new BerException() ;
}
catch(ArithmeticException e) {
next = backup ;
throw new BerException() ;
}
return result ;
|
| private final long | fetchIntegerValueAsLong()Fetch an integer value and return a long value.
FIX ME: someday we could have only on fetchIntegerValue() which always
returns a long value.
long result = 0 ;
final int backup = next ;
try {
final int length = fetchLength() ;
if (length <= 0) throw new BerException() ;
if (length > (bytes.length - next)) throw
new IndexOutOfBoundsException("Decoded length exceeds buffer");
final int end = next + length ;
result = bytes[next++] ;
while (next < end) {
final byte b = bytes[next++] ;
if (b < 0) {
result = (result << 8) | (256 + b) ;
}
else {
result = (result << 8) | b ;
}
}
}
catch(BerException e) {
next = backup ;
throw e ;
}
catch(IndexOutOfBoundsException e) {
next = backup ;
throw new BerException() ;
}
catch(ArithmeticException e) {
next = backup ;
throw new BerException() ;
}
return result ;
|
| private final int | fetchLength()Fetch a length and move the current position forward.
int result = 0 ;
final int backup = next ;
try {
final byte b0 = bytes[next++] ;
if (b0 >= 0) {
result = b0 ;
}
else {
for (int c = 128 + b0 ; c > 0 ; c--) {
final byte bX = bytes[next++] ;
result = result << 8 ;
result = result | ((bX >= 0) ? bX : bX+256) ;
}
}
}
catch(IndexOutOfBoundsException e) {
next = backup ;
throw new BerException() ;
}
return result ;
|
| public void | fetchNull()Fetch a NULL value.
fetchNull(NullTag) ;
|
| public void | fetchNull(int tag)Fetch a NULL value with a specified tag.
final int backup = next ;
try {
if (fetchTag() != tag) {
throw new BerException() ;
}
final int length = fetchLength();
if (length != 0) throw new BerException();
}
catch(BerException e) {
next = backup ;
throw e ;
}
|
| public byte[] | fetchOctetString()Fetch an octet string.
return fetchOctetString(OctetStringTag) ;
|
| public byte[] | fetchOctetString(int tag)Fetch an octet string with a specified tag.
byte[] result = null ;
final int backup = next ;
try {
if (fetchTag() != tag) {
throw new BerException() ;
}
result = fetchStringValue() ;
}
catch(BerException e) {
next = backup ;
throw e ;
}
return result ;
|
| public long[] | fetchOid(int tag)Fetch an object identifier with a specified tag.
long[] result = null ;
final int backup = next ;
try {
if (fetchTag() != tag) {
throw new BerException() ;
}
result = fetchOidValue() ;
}
catch(BerException e) {
next = backup ;
throw e ;
}
return result ;
|
| public long[] | fetchOid()Fetch an object identifier.
return fetchOid(OidTag) ;
|
| private final long[] | fetchOidValue()Fetch an oid and move the current position forward.
long[] result = null ;
final int backup = next ;
try {
final int length = fetchLength() ;
if (length <= 0) throw new BerException() ;
if (length > (bytes.length - next))
throw new IndexOutOfBoundsException("Decoded length exceeds buffer");
// Count how many bytes have their 8th bit to 0
// -> this gives the number of components in the oid
int subidCount = 2 ;
for (int i = 1 ; i < length ; i++) {
if ((bytes[next + i] & 0x80) == 0) {
subidCount++ ;
}
}
final int datalen = subidCount;
final long[] data = new long[datalen];
final byte b0 = bytes[next++] ;
// bugId 4641746
// The 8th bit of the first byte should always be set to 0
if (b0 < 0) throw new BerException();
// bugId 4641746
// The first sub Id cannot be greater than 2
final long lb0 = b0 / 40 ;
if (lb0 > 2) throw new BerException();
final long lb1 = b0 % 40;
data[0] = lb0 ;
data[1] = lb1 ;
int i = 2 ;
while (i < datalen) {
long subid = 0 ;
byte b = bytes[next++] ;
while ((b & 0x80) != 0) {
subid = (subid << 7) | (b & 0x7f) ;
// bugId 4654674
if (subid < 0) throw new BerException();
b = bytes[next++] ;
}
subid = (subid << 7) | b ;
// bugId 4654674
if (subid < 0) throw new BerException();
data[i++] = subid ;
}
result = data;
}
catch(BerException e) {
next = backup ;
throw e ;
}
catch(IndexOutOfBoundsException e) {
next = backup ;
throw new BerException() ;
}
// catch(Error e) {
// debug("fetchOidValue: Error decoding BER: " + e);
// throw e;
// }
return result ;
|
| private byte[] | fetchStringValue()Fetch a byte string and move the current position forward.
byte[] result = null ;
final int backup = next ;
try {
final int length = fetchLength() ;
if (length < 0) throw new BerException() ;
if (length > (bytes.length - next))
throw new IndexOutOfBoundsException("Decoded length exceeds buffer");
final byte data[] = new byte[length] ;
java.lang.System.arraycopy(bytes,next,data,0,length);
next += length;
// int i = 0 ;
// while (i < length) {
// result[i++] = bytes[next++] ;
// }
result = data;
}
catch(BerException e) {
next = backup ;
throw e ;
}
catch(IndexOutOfBoundsException e) {
next = backup ;
throw new BerException() ;
}
catch(ArithmeticException e) {
next = backup ;
throw new BerException() ;
}
// catch(Error e) {
// debug("fetchStringValue: Error decoding BER: " + e);
// throw e;
// }
return result ;
|
| private final int | fetchTag()Fetch a tag and move the current position forward.
////////////////////////// PRIVATE ///////////////////////////////
int result = 0 ;
final int backup = next ;
try {
final byte b0 = bytes[next++] ;
result = (b0 >= 0) ? b0 : b0 + 256 ;
if ((result & 31) == 31) {
while ((bytes[next] & 128) != 0) {
result = result << 7 ;
result = result | (bytes[next++] & 127);
}
}
}
catch(IndexOutOfBoundsException e) {
next = backup ;
throw new BerException() ;
}
return result ;
|
| public int | getTag()Get the tag of the data at the current position.
Current position is unchanged.
int result = 0 ;
final int backup = next ;
try {
result = fetchTag() ;
}
finally {
next = backup ;
}
return result ;
|
| public void | openSequence()Fetch a sequence header.
The decoder computes the end position of the sequence and push it
on its stack.
openSequence(SequenceTag) ;
|
| public void | openSequence(int tag)Fetch a sequence header with a specific tag.
final int backup = next ;
try {
if (fetchTag() != tag) {
throw new BerException() ;
}
final int l = fetchLength() ;
if (l < 0) throw new BerException();
if (l > (bytes.length - next)) throw new BerException();
stackBuf[stackTop++] = next + l ;
}
catch(BerException e) {
next = backup ;
throw e ;
}
|
| public void | reset()
next = 0 ;
stackTop = 0 ;
|
| public java.lang.String | toString()
final StringBuffer result = new StringBuffer(bytes.length * 2) ;
for (int i = 0 ; i < bytes.length ; i++) {
final int b = (bytes[i] > 0) ? bytes[i] : bytes[i] + 256 ;
if (i == next) {
result.append("(") ;
}
result.append(Character.forDigit(b / 16, 16)) ;
result.append(Character.forDigit(b % 16, 16)) ;
if (i == next) {
result.append(")") ;
}
}
if (bytes.length == next) {
result.append("()") ;
}
return new String(result) ;
|
