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#import "OFInvalidFormatException.h"
#import "OFOutOfRangeException.h"
@implementation OFASN1BitString
@synthesize bitStringValue = _bitStringValue;
@synthesize bitStringLength = _bitStringLength;
+ (instancetype)bitStringWithBitStringValue: (OFData *)bitStringValue
bitStringLength: (size_t)bitStringLength
+ (instancetype)bitStringWithBitString: (OFData *)bitString
length: (size_t)length
{
return [[[self alloc]
return [[[self alloc] initWithBitString: bitString
initWithBitStringValue: bitStringValue
bitStringLength: bitStringLength] autorelease];
- (instancetype)initWithBitStringValue: (OFData *)bitStringValue
- (instancetype)initWithBitString: (OFData *)bitString length: (size_t)length
bitStringLength: (size_t)bitStringLength
if (bitStringValue.count * bitStringValue.itemSize !=
OF_ROUND_UP_POW2(8, bitStringLength) / 8)
if (bitString.count * bitString.itemSize !=
OF_ROUND_UP_POW2(8, length) / 8)
@throw [OFInvalidFormatException exception];
_bitStringValue = [bitStringValue copy];
_bitStringLength = bitStringLength;
_bitStringValue = [bitString copy];
_bitStringLength = length;
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (instancetype)initWithTagClass: (of_asn1_tag_class_t)tagClass
tagNumber: (of_asn1_tag_number_t)tagNumber
constructed: (bool)constructed
DEREncodedContents: (OFData *)DEREncodedContents
{
void *pool = objc_autoreleasePoolPush();
OFData *bitStringValue;
size_t bitStringLength;
OFData *bitString;
size_t length;
@try {
unsigned char unusedBits;
size_t count = DEREncodedContents.count;
if (tagClass != OF_ASN1_TAG_CLASS_UNIVERSAL ||
tagNumber != OF_ASN1_TAG_NUMBER_BIT_STRING || constructed)
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*/
if (count == 1 && unusedBits != 0)
@throw [OFInvalidFormatException exception];
if (SIZE_MAX / 8 < count - 1)
@throw [OFOutOfRangeException exception];
bitStringLength = (count - 1) * 8;
bitStringValue = [DEREncodedContents subdataWithRange:
length = (count - 1) * 8;
bitString = [DEREncodedContents subdataWithRange:
of_range(1, count - 1)];
if (unusedBits != 0)
bitStringLength -= unusedBits;
length -= unusedBits;
} @catch (id e) {
[self release];
@throw e;
}
self = [self initWithBitStringValue: bitStringValue
self = [self initWithBitString: bitString length: length];
bitStringLength: bitStringLength];
size_t bitStringValueCount = [_bitStringValue count];
size_t bitStringValueCount = _bitStringValue.count;
size_t roundedUpLength = OF_ROUND_UP_POW2(8, _bitStringLength);
unsigned char unusedBits = roundedUpLength - _bitStringLength;
unsigned char header[] = {
OF_ASN1_TAG_NUMBER_BIT_STRING,
bitStringValueCount + 1,
unusedBits
};
OFMutableData *data;
if (bitStringValueCount + 1 > UINT8_MAX ||
bitStringValueCount != roundedUpLength / 8)
@throw [OFInvalidFormatException exception];
data = [OFMutableData
dataWithCapacity: sizeof(header) + bitStringValueCount];
[data addItems: header count: sizeof(header)];
[data addItems: [_bitStringValue items] count: bitStringValueCount];
[data addItems: _bitStringValue.items count: bitStringValueCount];
[data makeImmutable];
return data;
}
- (bool)isEqual: (id)object
|