|
private FromObjectAndTag ( Object o, ulong tag ) : |
||
| o | Object | |
| tag | ulong | |
| 리턴 | ||
public CBORObject ToCBORObject(Uri uri)
{
if (uri == null)
{
throw new ArgumentNullException(nameof(uri));
}
string uriString = uri.ToString();
return(CBORObject.FromObjectAndTag(uriString, (int)32));
}
/// <include file='../../docs.xml'
/// path='docs/doc[@name="M:PeterO.Cbor.CBORTag37.ToCBORObject(System.Guid)"]/*'/>
public CBORObject ToCBORObject(Guid obj)
{
byte[] bytes = obj.ToByteArray();
var bytes2 = new byte[16];
Array.Copy(bytes, bytes2, 16);
// Swap the bytes to conform with the UUID RFC
bytes2[0] = bytes[3];
bytes2[1] = bytes[2];
bytes2[2] = bytes[1];
bytes2[3] = bytes[0];
bytes2[4] = bytes[5];
bytes2[5] = bytes[4];
bytes2[6] = bytes[7];
bytes2[7] = bytes[6];
return(CBORObject.FromObjectAndTag(bytes2, (int)37));
}
public CBORObject ToCBORObject(Uri uri)
{
if (uri == null)
{
throw new ArgumentNullException(nameof(uri));
}
string uriString = uri.ToString();
var nonascii = false;
for (var i = 0; i < uriString.Length; ++i)
{
nonascii |= uriString[i] >= 0x80;
}
int tag = nonascii ? 266 : 32;
if (!URIUtility.HasScheme(uriString))
{
tag = 267;
}
return(CBORObject.FromObjectAndTag(uriString, (int)tag));
}
private static CBORObject FromObjectAndInnerTags(
object objectValue,
CBORObject objectWithTags)
{
CBORObject newObject = CBORObject.FromObject(objectValue);
if (!objectWithTags.IsTagged)
{
return(newObject);
}
objectWithTags = objectWithTags.UntagOne();
if (!objectWithTags.IsTagged)
{
return(newObject);
}
EInteger[] tags = objectWithTags.GetAllTags();
for (int i = tags.Length - 1; i >= 0; --i)
{
newObject = CBORObject.FromObjectAndTag(newObject, tags[i]);
}
return(newObject);
}
/// <summary>Converts a date/time in the form of a year, month, day,
/// hour, minute, second, fractional seconds, and time offset to a CBOR
/// object.</summary>
/// <param name='bigYear'>The parameter <paramref name='bigYear'/> is a
/// Numbers.EInteger object.</param>
/// <param name='lesserFields'>An array that will store the fields
/// (other than the year) of the date and time. See the
/// TryGetDateTimeFields method for information on the "lesserFields"
/// parameter.</param>
/// <returns>A CBOR object encoding the given date fields according to
/// the conversion type used to create this date converter.</returns>
/// <exception cref='ArgumentNullException'>The parameter <paramref
/// name='bigYear'/> or <paramref name='lesserFields'/> is
/// null.</exception>
/// <exception cref='PeterO.Cbor.CBORException'>An error occurred in
/// conversion.</exception>
public CBORObject DateTimeFieldsToCBORObject(EInteger bigYear, int[]
lesserFields)
{
if (bigYear == null)
{
throw new ArgumentNullException(nameof(bigYear));
}
if (lesserFields == null)
{
throw new ArgumentNullException(nameof(lesserFields));
}
if (lesserFields.Length < 7)
{
throw new ArgumentException("\"lesserFields\" + \"'s length\" (" +
lesserFields.Length + ") is not greater or equal to 7");
}
try {
switch (this.convType)
{
case ConversionType.TaggedString: {
string str = CBORUtilities.ToAtomDateTimeString(bigYear,
lesserFields);
return(CBORObject.FromObjectAndTag(str, 0));
}
case ConversionType.TaggedNumber:
case ConversionType.UntaggedNumber:
try {
var status = new int[1];
EFloat ef = CBORUtilities.DateTimeToIntegerOrDouble(
bigYear,
lesserFields,
status);
if (status[0] == 0)
{
return(this.convType == ConversionType.TaggedNumber ?
CBORObject.FromObjectAndTag(ef.ToEInteger(), 1) :
CBORObject.FromObject(ef.ToEInteger()));
}
else if (status[0] == 1)
{
return(this.convType == ConversionType.TaggedNumber ?
CBORObject.FromFloatingPointBits(ef.ToDoubleBits(),
8).WithTag(1) : CBORObject.FromFloatingPointBits(ef.ToDoubleBits(), 8));
}
else
{
throw new CBORException("Too big or small to fit an integer" +
"\u0020or" +
"\u0020floating-point number");
}
} catch (ArgumentException ex) {
throw new CBORException(ex.Message, ex);
}
default:
throw new CBORException("Internal error");
}
} catch (ArgumentException ex) {
throw new CBORException(ex.Message, ex);
}
}
internal static CBORObject ParseJSONNumber(
string str,
int offset,
int count,
JSONOptions options,
int[] endOfNumber)
{
if (String.IsNullOrEmpty(str) || count <= 0)
{
return(null);
}
if (offset < 0 || offset > str.Length)
{
return(null);
}
if (count > str.Length || str.Length - offset < count)
{
return(null);
}
JSONOptions opt = options ?? DefaultOptions;
bool preserveNegativeZero = options.PreserveNegativeZero;
JSONOptions.ConversionMode kind = options.NumberConversion;
int endPos = offset + count;
int initialOffset = offset;
var negative = false;
if (str[initialOffset] == '-')
{
++offset;
negative = true;
}
int numOffset = offset;
var haveDecimalPoint = false;
var haveDigits = false;
var haveDigitsAfterDecimal = false;
var haveExponent = false;
int i = offset;
var decimalPointPos = -1;
// Check syntax
int k = i;
if (endPos - 1 > k && str[k] == '0' && str[k + 1] >= '0' &&
str[k + 1] <= '9')
{
if (endOfNumber != null)
{
endOfNumber[0] = k + 2;
}
return(null);
}
for (; k < endPos; ++k)
{
char c = str[k];
if (c >= '0' && c <= '9')
{
haveDigits = true;
haveDigitsAfterDecimal |= haveDecimalPoint;
}
else if (c == '.')
{
if (!haveDigits || haveDecimalPoint)
{
// no digits before the decimal point,
// or decimal point already seen
if (endOfNumber != null)
{
endOfNumber[0] = k;
}
return(null);
}
haveDecimalPoint = true;
decimalPointPos = k;
}
else if (c == 'E' || c == 'e')
{
++k;
haveExponent = true;
break;
}
else
{
if (endOfNumber != null)
{
endOfNumber[0] = k;
// Check if character can validly appear after a JSON number
if (c != ',' && c != ']' && c != '}' &&
c != 0x20 && c != 0x0a && c != 0x0d && c != 0x09)
{
return(null);
}
else
{
endPos = k;
break;
}
}
return(null);
}
}
if (!haveDigits || (haveDecimalPoint && !haveDigitsAfterDecimal))
{
if (endOfNumber != null)
{
endOfNumber[0] = k;
}
return(null);
}
if (haveExponent)
{
haveDigits = false;
if (k == endPos)
{
if (endOfNumber != null)
{
endOfNumber[0] = k;
}
return(null);
}
char c = str[k];
if (c == '+' || c == '-')
{
++k;
}
for (; k < endPos; ++k)
{
c = str[k];
if (c >= '0' && c <= '9')
{
haveDigits = true;
}
else if (endOfNumber != null)
{
endOfNumber[0] = k;
// Check if character can validly appear after a JSON number
if (c != ',' && c != ']' && c != '}' &&
c != 0x20 && c != 0x0a && c != 0x0d && c != 0x09)
{
return(null);
}
else
{
endPos = k;
break;
}
}
else
{
return(null);
}
}
if (!haveDigits)
{
if (endOfNumber != null)
{
endOfNumber[0] = k;
}
return(null);
}
}
if (endOfNumber != null)
{
endOfNumber[0] = endPos;
}
if (!haveExponent && !haveDecimalPoint &&
(endPos - numOffset) <= 16)
{
// Very common case of all-digit JSON number strings
// less than 2^53 (with or without number sign)
long v = 0L;
int vi = numOffset;
for (; vi < endPos; ++vi)
{
v = (v * 10) + (int)(str[vi] - '0');
}
if ((v != 0 || !negative) && v < (1L << 53) - 1)
{
if (negative)
{
v = -v;
}
if (kind == JSONOptions.ConversionMode.Double)
{
return(CBORObject.FromObject((double)v));
}
else if (kind == JSONOptions.ConversionMode.Decimal128)
{
return(CBORObject.FromObject(EDecimal.FromInt64(v)));
}
else
{
return(CBORObject.FromObject(v));
}
}
}
if (kind == JSONOptions.ConversionMode.Full)
{
if (!haveDecimalPoint && !haveExponent)
{
EInteger ei = EInteger.FromSubstring(str, initialOffset, endPos);
if (preserveNegativeZero && ei.IsZero && negative)
{
// TODO: In next major version, change to EDecimal.NegativeZero
return(CBORObject.FromFloatingPointBits(0x8000, 2));
}
return(CBORObject.FromObject(ei));
}
if (!haveExponent && haveDecimalPoint && (endPos - numOffset) <= 19)
{
// No more than 18 digits plus one decimal point (which
// should fit a long)
long lv = 0L;
int expo = -(endPos - (decimalPointPos + 1));
int vi = numOffset;
for (; vi < decimalPointPos; ++vi)
{
lv = checked ((lv * 10) + (int)(str[vi] - '0'));
}
for (vi = decimalPointPos + 1; vi < endPos; ++vi)
{
lv = checked ((lv * 10) + (int)(str[vi] - '0'));
}
if (negative)
{
lv = -lv;
}
if (!negative || lv != 0)
{
CBORObject cbor = CBORObject.NewArray()
.Add(expo).Add(lv);
return(CBORObject.FromObjectAndTag(cbor, 4));
}
}
EDecimal ed = EDecimal.FromString(
str,
initialOffset,
endPos - initialOffset);
if (ed.IsZero && negative)
{
if (preserveNegativeZero && ed.Exponent.IsZero)
{
// TODO: In next major version, use EDecimal
return(CBORObject.FromFloatingPointBits(0x8000, 2));
}
else if (!preserveNegativeZero)
{
ed = ed.Negate();
}
}
return(CBORObject.FromObject(ed));
}
else if (kind == JSONOptions.ConversionMode.Double)
{
double dbl = EFloat.FromString(
str,
initialOffset,
endPos - initialOffset,
EContext.Binary64).ToDouble();
if (!preserveNegativeZero && dbl == 0.0)
{
dbl = 0.0;
}
return(CBORObject.FromObject(dbl));
}
else if (kind == JSONOptions.ConversionMode.Decimal128)
{
EDecimal ed = EDecimal.FromString(
str,
initialOffset,
endPos - initialOffset,
EContext.Decimal128);
if (!preserveNegativeZero && ed.IsNegative && ed.IsZero)
{
ed = ed.Negate();
}
return(CBORObject.FromObject(ed));
}
else if (kind == JSONOptions.ConversionMode.IntOrFloatFromDouble)
{
double dbl = EFloat.FromString(
str,
initialOffset,
endPos - initialOffset,
EContext.Binary64).ToDouble();
if (!Double.IsNaN(dbl) && dbl >= -9007199254740991.0 &&
dbl <= 9007199254740991.0 && Math.Floor(dbl) == dbl)
{
var idbl = (long)dbl;
return(CBORObject.FromObject(idbl));
}
return(CBORObject.FromObject(dbl));
}
else if (kind == JSONOptions.ConversionMode.IntOrFloat)
{
EContext ctx = EContext.Binary64.WithBlankFlags();
double dbl = EFloat.FromString(
str,
initialOffset,
endPos - initialOffset,
ctx).ToDouble();
if ((ctx.Flags & EContext.FlagInexact) != 0)
{
// Inexact conversion to double, meaning that the string doesn't
// represent an integer in [-(2^53)+1, 2^53), which is representable
// exactly as double, so treat as ConversionMode.Double
if (!preserveNegativeZero && dbl == 0.0)
{
dbl = 0.0;
}
return(CBORObject.FromObject(dbl));
}
else
{
// Exact conversion; treat as ConversionMode.IntToFloatFromDouble
if (!Double.IsNaN(dbl) && dbl >= -9007199254740991.0 &&
dbl <= 9007199254740991.0 && Math.Floor(dbl) == dbl)
{
var idbl = (long)dbl;
return(CBORObject.FromObject(idbl));
}
return(CBORObject.FromObject(dbl));
}
}
else
{
throw new ArgumentException("Unsupported conversion kind.");
}
}
public CBORObject ToCBORObject(DateTime obj)
{
return(CBORObject.FromObjectAndTag(DateTimeToString(obj), 0));
}
/// <include file='../../docs.xml'
/// path='docs/doc[@name="M:PeterO.Cbor.CBORTag37.ToCBORObject(System.Guid)"]/*'/>
public CBORObject ToCBORObject(Guid obj)
{
byte[] bytes = PropertyMap.UUIDToBytes(obj);
return(CBORObject.FromObjectAndTag(bytes, (int)37));
}
public CBORObject ReadForFirstByte(
int firstbyte,
CBORTypeFilter filter)
{
if (this.depth > 500)
{
throw new CBORException("Too deeply nested");
}
if (firstbyte < 0)
{
throw new CBORException("Premature end of data");
}
if (firstbyte == 0xff)
{
throw new CBORException("Unexpected break code encountered");
}
int type = (firstbyte >> 5) & 0x07;
int additional = firstbyte & 0x1f;
int expectedLength = CBORObject.GetExpectedLength(firstbyte);
// Data checks
if (expectedLength == -1)
{
// if the head byte is invalid
throw new CBORException("Unexpected data encountered");
}
if (filter != null)
{
// Check for valid major types if asked
if (!filter.MajorTypeMatches(type))
{
throw new CBORException("Unexpected data type encountered");
}
if (firstbyte >= 0xe0 && firstbyte <= 0xff && firstbyte != 0xf9 &&
firstbyte != 0xfa && firstbyte != 0xfb)
{
if (!filter.NonFPSimpleValueAllowed())
{
throw new CBORException("Unexpected data type encountered");
}
}
}
// Check if this represents a fixed object
CBORObject fixedObject = CBORObject.GetFixedObject(firstbyte);
if (fixedObject != null)
{
return(fixedObject);
}
// Read fixed-length data
byte[] data = null;
if (expectedLength != 0)
{
data = new byte[expectedLength];
// include the first byte because GetFixedLengthObject
// will assume it exists for some head bytes
data[0] = unchecked ((byte)firstbyte);
if (expectedLength > 1 &&
this.stream.Read(data, 1, expectedLength - 1) != expectedLength
- 1)
{
throw new CBORException("Premature end of data");
}
CBORObject cbor = CBORObject.GetFixedLengthObject(firstbyte, data);
if (this.stringRefs != null && (type == 2 || type == 3))
{
this.stringRefs.AddStringIfNeeded(cbor, expectedLength - 1);
}
return(cbor);
}
var uadditional = (long)additional;
EInteger bigintAdditional = EInteger.Zero;
var hasBigAdditional = false;
data = new byte[8];
var lowAdditional = 0;
switch (firstbyte & 0x1f)
{
case 24: {
int tmp = this.stream.ReadByte();
if (tmp < 0)
{
throw new CBORException("Premature end of data");
}
lowAdditional = tmp;
uadditional = lowAdditional;
break;
}
case 25: {
if (this.stream.Read(data, 0, 2) != 2)
{
throw new CBORException("Premature end of data");
}
lowAdditional = ((int)(data[0] & (int)0xff)) << 8;
lowAdditional |= (int)(data[1] & (int)0xff);
uadditional = lowAdditional;
break;
}
case 26: {
if (this.stream.Read(data, 0, 4) != 4)
{
throw new CBORException("Premature end of data");
}
uadditional = ((long)(data[0] & (long)0xff)) << 24;
uadditional |= ((long)(data[1] & (long)0xff)) << 16;
uadditional |= ((long)(data[2] & (long)0xff)) << 8;
uadditional |= (long)(data[3] & (long)0xff);
break;
}
case 27: {
if (this.stream.Read(data, 0, 8) != 8)
{
throw new CBORException("Premature end of data");
}
if ((((int)data[0]) & 0x80) != 0)
{
// Won't fit in a signed 64-bit number
var uabytes = new byte[9];
uabytes[0] = data[7];
uabytes[1] = data[6];
uabytes[2] = data[5];
uabytes[3] = data[4];
uabytes[4] = data[3];
uabytes[5] = data[2];
uabytes[6] = data[1];
uabytes[7] = data[0];
uabytes[8] = 0;
hasBigAdditional = true;
bigintAdditional = EInteger.FromBytes(uabytes, true);
}
else
{
uadditional = ((long)(data[0] & (long)0xff)) << 56;
uadditional |= ((long)(data[1] & (long)0xff)) << 48;
uadditional |= ((long)(data[2] & (long)0xff)) << 40;
uadditional |= ((long)(data[3] & (long)0xff)) << 32;
uadditional |= ((long)(data[4] & (long)0xff)) << 24;
uadditional |= ((long)(data[5] & (long)0xff)) << 16;
uadditional |= ((long)(data[6] & (long)0xff)) << 8;
uadditional |= (long)(data[7] & (long)0xff);
}
break;
}
}
// The following doesn't check for major types 0 and 1,
// since all of them are fixed-length types and are
// handled in the call to GetFixedLengthObject.
if (type == 2) // Byte string
{
if (additional == 31)
{
// Streaming byte string
using (var ms = new MemoryStream()) {
// Requires same type as this one
while (true)
{
int nextByte = this.stream.ReadByte();
if (nextByte == 0xff)
{
// break if the "break" code was read
break;
}
long len = ReadDataLength(this.stream, nextByte, 2);
if ((len >> 63) != 0 || len > Int32.MaxValue)
{
throw new CBORException("Length" + ToUnsignedBigInteger(len) +
" is bigger than supported ");
}
if (nextByte != 0x40)
{
// NOTE: 0x40 means the empty byte string
ReadByteData(this.stream, len, ms);
}
}
if (ms.Position > Int32.MaxValue)
{
throw new
CBORException("Length of bytes to be streamed is bigger than supported ");
}
data = ms.ToArray();
return(new CBORObject(
CBORObject.CBORObjectTypeByteString,
data));
}
}
else
{
if (hasBigAdditional)
{
throw new CBORException("Length of " +
CBORUtilities.BigIntToString(bigintAdditional) + " is bigger than supported");
}
if (uadditional > Int32.MaxValue)
{
throw new CBORException("Length of " +
CBORUtilities.LongToString(uadditional) +
" is bigger than supported");
}
data = ReadByteData(this.stream, uadditional, null);
var cbor = new CBORObject(CBORObject.CBORObjectTypeByteString, data);
if (this.stringRefs != null)
{
int hint = (uadditional > Int32.MaxValue || hasBigAdditional) ?
Int32.MaxValue : (int)uadditional;
this.stringRefs.AddStringIfNeeded(cbor, hint);
}
return(cbor);
}
}
if (type == 3) // Text string
{
if (additional == 31)
{
// Streaming text string
var builder = new StringBuilder();
while (true)
{
int nextByte = this.stream.ReadByte();
if (nextByte == 0xff)
{
// break if the "break" code was read
break;
}
long len = ReadDataLength(this.stream, nextByte, 3);
if ((len >> 63) != 0 || len > Int32.MaxValue)
{
throw new CBORException("Length" + ToUnsignedBigInteger(len) +
" is bigger than supported");
}
if (nextByte != 0x60)
{
// NOTE: 0x60 means the empty string
if (PropertyMap.ExceedsKnownLength(this.stream, len))
{
throw new CBORException("Premature end of data");
}
switch (
DataUtilities.ReadUtf8(
this.stream,
(int)len,
builder,
false))
{
case -1:
throw new CBORException("Invalid UTF-8");
case -2:
throw new CBORException("Premature end of data");
}
}
}
return(new CBORObject(
CBORObject.CBORObjectTypeTextString,
builder.ToString()));
}
else
{
if (hasBigAdditional)
{
throw new CBORException("Length of " +
CBORUtilities.BigIntToString(bigintAdditional) + " is bigger than supported");
}
if (uadditional > Int32.MaxValue)
{
throw new CBORException("Length of " +
CBORUtilities.LongToString(uadditional) +
" is bigger than supported");
}
if (PropertyMap.ExceedsKnownLength(this.stream, uadditional))
{
throw new CBORException("Premature end of data");
}
var builder = new StringBuilder();
switch (
DataUtilities.ReadUtf8(
this.stream,
(int)uadditional,
builder,
false))
{
case -1:
throw new CBORException("Invalid UTF-8");
case -2:
throw new CBORException("Premature end of data");
}
var cbor = new CBORObject(
CBORObject.CBORObjectTypeTextString,
builder.ToString());
if (this.stringRefs != null)
{
int hint = (uadditional > Int32.MaxValue || hasBigAdditional) ?
Int32.MaxValue : (int)uadditional;
this.stringRefs.AddStringIfNeeded(cbor, hint);
}
return(cbor);
}
}
if (type == 4) // Array
{
CBORObject cbor = CBORObject.NewArray();
if (additional == 31)
{
var vtindex = 0;
// Indefinite-length array
while (true)
{
int headByte = this.stream.ReadByte();
if (headByte < 0)
{
throw new CBORException("Premature end of data");
}
if (headByte == 0xff)
{
// Break code was read
break;
}
if (filter != null && !filter.ArrayIndexAllowed(vtindex))
{
throw new CBORException("Array is too long");
}
++this.depth;
CBORObject o = this.ReadForFirstByte(
headByte,
filter == null ? null : filter.GetSubFilter(vtindex));
--this.depth;
cbor.Add(o);
++vtindex;
}
return(cbor);
}
if (hasBigAdditional)
{
throw new CBORException("Length of " +
CBORUtilities.BigIntToString(bigintAdditional) + " is bigger than supported");
}
if (uadditional > Int32.MaxValue)
{
throw new CBORException("Length of " +
CBORUtilities.LongToString(uadditional) +
" is bigger than supported");
}
if (filter != null && !filter.ArrayLengthMatches(uadditional))
{
throw new CBORException("Array is too long");
}
if (PropertyMap.ExceedsKnownLength(this.stream, uadditional))
{
throw new CBORException("Remaining data too small for array length");
}
++this.depth;
for (long i = 0; i < uadditional; ++i)
{
cbor.Add(
this.Read(filter == null ? null : filter.GetSubFilter(i)));
}
--this.depth;
return(cbor);
}
if (type == 5) // Map, type 5
{
CBORObject cbor = CBORObject.NewMap();
if (additional == 31)
{
// Indefinite-length map
while (true)
{
int headByte = this.stream.ReadByte();
if (headByte < 0)
{
throw new CBORException("Premature end of data");
}
if (headByte == 0xff)
{
// Break code was read
break;
}
++this.depth;
CBORObject key = this.ReadForFirstByte(headByte, null);
CBORObject value = this.Read(null);
--this.depth;
if (this.policy == CBORDuplicatePolicy.Disallow)
{
if (cbor.ContainsKey(key))
{
throw new CBORException("Duplicate key already exists: " + key);
}
}
cbor[key] = value;
}
return(cbor);
}
if (hasBigAdditional)
{
throw new CBORException("Length of " +
CBORUtilities.BigIntToString(bigintAdditional) + " is bigger than supported");
}
if (uadditional > Int32.MaxValue)
{
throw new CBORException("Length of " +
CBORUtilities.LongToString(uadditional) +
" is bigger than supported");
}
if (PropertyMap.ExceedsKnownLength(this.stream, uadditional))
{
throw new CBORException("Remaining data too small for map length");
}
for (long i = 0; i < uadditional; ++i)
{
++this.depth;
CBORObject key = this.Read(null);
CBORObject value = this.Read(null);
--this.depth;
if (this.policy == CBORDuplicatePolicy.Disallow)
{
if (cbor.ContainsKey(key))
{
throw new CBORException("Duplicate key already exists: " + key);
}
}
cbor[key] = value;
}
return(cbor);
}
if (type == 6) // Tagged item
{
ICBORTag taginfo = null;
var haveFirstByte = false;
var newFirstByte = -1;
if (!hasBigAdditional)
{
if (filter != null && !filter.TagAllowed(uadditional))
{
throw new CBORException("Unexpected tag encountered: " +
uadditional);
}
int uad = uadditional >= 257 ? 257 : (uadditional < 0 ? 0 :
(int)uadditional);
switch (uad)
{
case 256:
// Tag 256: String namespace
this.stringRefs = this.stringRefs ?? (new StringRefs());
this.stringRefs.Push();
break;
case 25:
// String reference
if (this.stringRefs == null)
{
throw new CBORException("No stringref namespace");
}
break;
case 28:
case 29:
this.hasSharableObjects = true;
break;
}
taginfo = CBORObject.FindTagConverterLong(uadditional);
}
else
{
if (filter != null && !filter.TagAllowed(bigintAdditional))
{
throw new CBORException("Unexpected tag encountered: " +
uadditional);
}
taginfo = CBORObject.FindTagConverter(bigintAdditional);
}
++this.depth;
CBORObject o = haveFirstByte ? this.ReadForFirstByte(
newFirstByte,
taginfo == null ? null : taginfo.GetTypeFilter()) :
this.Read(taginfo == null ? null : taginfo.GetTypeFilter());
--this.depth;
if (hasBigAdditional)
{
return(CBORObject.FromObjectAndTag(o, bigintAdditional));
}
if (uadditional < 65536)
{
int uaddl = uadditional >= 257 ? 257 : (uadditional < 0 ? 0 :
(int)uadditional);
switch (uaddl)
{
case 256:
// string tag
this.stringRefs.Pop();
break;
case 25:
// stringref tag
return(this.stringRefs.GetString(o.AsEInteger()));
}
return(CBORObject.FromObjectAndTag(
o,
(int)uadditional));
}
return(CBORObject.FromObjectAndTag(
o,
(EInteger)uadditional));
}
throw new CBORException("Unexpected data encountered");
}
public CBORObject ReadForFirstByte(int firstbyte)
{
if (this.depth > 500)
{
throw new CBORException("Too deeply nested");
}
if (firstbyte < 0)
{
throw new CBORException("Premature end of data");
}
if (firstbyte == 0xff)
{
throw new CBORException("Unexpected break code encountered");
}
int type = (firstbyte >> 5) & 0x07;
int additional = firstbyte & 0x1f;
long uadditional;
CBORObject fixedObject;
if (this.options.Ctap2Canonical)
{
if (additional >= 0x1c)
{
// NOTE: Includes stop byte and indefinite length data items
throw new CBORException("Invalid canonical CBOR encountered");
}
// Check if this represents a fixed object (NOTE: All fixed objects
// comply with CTAP2 canonical CBOR).
fixedObject = CBORObject.GetFixedObject(firstbyte);
if (fixedObject != null)
{
return(fixedObject);
}
if (type == 6)
{
throw new CBORException("Tags not allowed in canonical CBOR");
}
uadditional = ReadDataLength(
this.stream,
firstbyte,
type,
type == 7);
if (type == 0)
{
return((uadditional >> 63) != 0 ?
CBORObject.FromObject(ToUnsignedEInteger(uadditional)) :
CBORObject.FromObject(uadditional));
}
else if (type == 1)
{
return((uadditional >> 63) != 0 ? CBORObject.FromObject(
ToUnsignedEInteger(uadditional).Add(1).Negate()) :
CBORObject.FromObject((-uadditional) - 1L));
}
else if (type == 7)
{
if (additional < 24)
{
return(CBORObject.FromSimpleValue(additional));
}
else if (additional == 24 && uadditional < 32)
{
throw new CBORException("Invalid simple value encoding");
}
else if (additional == 24)
{
return(CBORObject.FromSimpleValue((int)uadditional));
}
else if (additional == 25)
{
return(CBORObject.FromFloatingPointBits(uadditional, 2));
}
else if (additional == 26)
{
return(CBORObject.FromFloatingPointBits(uadditional, 4));
}
else if (additional == 27)
{
return(CBORObject.FromFloatingPointBits(uadditional, 8));
}
}
else if (type >= 2 && type <= 5)
{
return(this.ReadStringArrayMap(type, uadditional));
}
throw new CBORException("Unexpected data encountered");
}
int expectedLength = CBORObject.GetExpectedLength(firstbyte);
// Data checks
if (expectedLength == -1)
{
// if the head byte is invalid
throw new CBORException("Unexpected data encountered");
}
// Check if this represents a fixed object
fixedObject = CBORObject.GetFixedObject(firstbyte);
if (fixedObject != null)
{
return(fixedObject);
}
// Read fixed-length data
byte[] data = null;
if (expectedLength != 0)
{
data = new byte[expectedLength];
// include the first byte because GetFixedLengthObject
// will assume it exists for some head bytes
data[0] = unchecked ((byte)firstbyte);
if (expectedLength > 1 &&
this.stream.Read(data, 1, expectedLength - 1) != expectedLength
- 1)
{
throw new CBORException("Premature end of data");
}
CBORObject cbor = CBORObject.GetFixedLengthObject(firstbyte, data);
if (this.stringRefs != null && (type == 2 || type == 3))
{
this.stringRefs.AddStringIfNeeded(cbor, expectedLength - 1);
}
return(cbor);
}
if (additional == 31)
{
// Indefinite-length for major types 2 to 5 (other major
// types were already handled in the call to
// GetFixedLengthObject).
switch (type)
{
case 2: {
// Streaming byte string
using (var ms = new MemoryStream()) {
// Requires same type as this one
while (true)
{
int nextByte = this.stream.ReadByte();
if (nextByte == 0xff)
{
// break if the "break" code was read
break;
}
long len = ReadDataLength(this.stream, nextByte, 2);
if ((len >> 63) != 0 || len > Int32.MaxValue)
{
throw new CBORException("Length" + ToUnsignedEInteger(len)
+
" is bigger than supported ");
}
if (nextByte != 0x40)
{
// NOTE: 0x40 means the empty byte string
ReadByteData(this.stream, len, ms);
}
}
if (ms.Position > Int32.MaxValue)
{
throw new
CBORException("Length of bytes to be streamed is bigger" +
"\u0020than supported ");
}
data = ms.ToArray();
return(CBORObject.FromRaw(data));
}
}
case 3: {
// Streaming text string
var builder = new StringBuilder();
while (true)
{
int nextByte = this.stream.ReadByte();
if (nextByte == 0xff)
{
// break if the "break" code was read
break;
}
long len = ReadDataLength(this.stream, nextByte, 3);
if ((len >> 63) != 0 || len > Int32.MaxValue)
{
throw new CBORException("Length" + ToUnsignedEInteger(len) +
" is bigger than supported");
}
if (nextByte != 0x60)
{
// NOTE: 0x60 means the empty string
if (PropertyMap.ExceedsKnownLength(this.stream, len))
{
throw new CBORException("Premature end of data");
}
switch (
DataUtilities.ReadUtf8(
this.stream,
(int)len,
builder,
false))
{
case -1:
throw new CBORException("Invalid UTF-8");
case -2:
throw new CBORException("Premature end of data");
}
}
}
return(CBORObject.FromRaw(builder.ToString()));
}
case 4: {
CBORObject cbor = CBORObject.NewArray();
var vtindex = 0;
// Indefinite-length array
while (true)
{
int headByte = this.stream.ReadByte();
if (headByte < 0)
{
throw new CBORException("Premature end of data");
}
if (headByte == 0xff)
{
// Break code was read
break;
}
++this.depth;
CBORObject o = this.ReadForFirstByte(
headByte);
--this.depth;
cbor.Add(o);
++vtindex;
}
return(cbor);
}
case 5: {
CBORObject cbor = CBORObject.NewMap();
// Indefinite-length map
while (true)
{
int headByte = this.stream.ReadByte();
if (headByte < 0)
{
throw new CBORException("Premature end of data");
}
if (headByte == 0xff)
{
// Break code was read
break;
}
++this.depth;
CBORObject key = this.ReadForFirstByte(headByte);
CBORObject value = this.ReadInternal();
--this.depth;
if (!this.options.AllowDuplicateKeys)
{
if (cbor.ContainsKey(key))
{
throw new CBORException("Duplicate key already exists");
}
}
cbor[key] = value;
}
return(cbor);
}
default: throw new CBORException("Unexpected data encountered");
}
}
EInteger bigintAdditional = EInteger.Zero;
uadditional = ReadDataLength(this.stream, firstbyte, type);
// The following doesn't check for major types 0 and 1,
// since all of them are fixed-length types and are
// handled in the call to GetFixedLengthObject.
if (type >= 2 && type <= 5)
{
return(this.ReadStringArrayMap(type, uadditional));
}
if (type == 6) // Tagged item
{
var haveFirstByte = false;
var newFirstByte = -1;
if (this.options.ResolveReferences && (uadditional >> 32) == 0)
{
// NOTE: HandleItemTag treats only certain tags up to 256 specially
this.HandleItemTag(uadditional);
}
++this.depth;
CBORObject o = haveFirstByte ? this.ReadForFirstByte(
newFirstByte) : this.ReadInternal();
--this.depth;
if ((uadditional >> 63) != 0)
{
return(CBORObject.FromObjectAndTag(o,
ToUnsignedEInteger(uadditional)));
}
if (uadditional < 65536)
{
if (this.options.ResolveReferences)
{
int uaddl = uadditional >= 257 ? 257 : (uadditional < 0 ? 0 :
(int)uadditional);
switch (uaddl)
{
case 256:
// string tag
this.stringRefs.Pop();
break;
case 25:
// stringref tag
if (o.IsTagged || o.Type != CBORType.Integer)
{
throw new CBORException("stringref must be an unsigned" +
"\u0020integer");
}
return(this.stringRefs.GetString(o.AsEIntegerValue()));
}
}
return(CBORObject.FromObjectAndTag(
o,
(int)uadditional));
}
return(CBORObject.FromObjectAndTag(
o,
(EInteger)uadditional));
}
throw new CBORException("Unexpected data encountered");
}
