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//
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// MYASN1Object.m
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// MYCrypto-iPhone
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//
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// Created by Jens Alfke on 5/28/09.
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// Copyright 2009 Jens Alfke. All rights reserved.
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//
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// Reference:
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// <http://www.columbia.edu/~ariel/ssleay/layman.html> "Layman's Guide To ASN.1/BER/DER"
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#import "MYASN1Object.h"
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@implementation MYASN1Object
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- (id) initWithTag: (uint32_t)tag
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ofClass: (uint8_t)tagClass
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constructed: (BOOL)constructed
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value: (NSData*)value
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{
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Assert(value);
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self = [super init];
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if (self != nil) {
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_tag = tag;
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_tagClass = tagClass;
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_constructed = constructed;
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_value = [value copy];
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}
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return self;
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}
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- (id) initWithTag: (uint32_t)tag
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ofClass: (uint8_t)tagClass
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components: (NSArray*)components
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{
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Assert(components);
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self = [super init];
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if (self != nil) {
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_tag = tag;
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_tagClass = tagClass;
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_constructed = YES;
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_components = [components copy];
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}
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return self;
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}
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- (void) dealloc
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{
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[_value release];
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[_components release];
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[super dealloc];
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}
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@synthesize tag=_tag, tagClass=_tagClass, constructed=_constructed, value=_value, components=_components;
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- (NSString*)description {
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if (_components)
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return $sprintf(@"%@[%hhu/%u/%u]%@", self.class, _tagClass,(unsigned)_constructed,_tag, _components);
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else
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return $sprintf(@"%@[%hhu/%u/%u, %u bytes]", self.class, _tagClass,(unsigned)_constructed,_tag, _value.length);
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}
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- (BOOL) isEqual: (id)object {
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return [object isKindOfClass: [MYASN1Object class]]
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&& _tag==[object tag]
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&& _tagClass==[object tagClass]
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&& _constructed==[object constructed]
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&& $equal(_value,[object value])
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&& $equal(_components,[object components]);
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}
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static void dump(id object, NSMutableString *output, NSString *indent) {
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if ([object isKindOfClass: [MYASN1Object class]]) {
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MYASN1Object *asn1Obj = object;
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[output appendFormat: @"%@%@[%hhu/%u]", indent, asn1Obj.class, asn1Obj.tagClass,asn1Obj.tag];
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if (asn1Obj.components) {
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[output appendString: @":\n"];
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NSString *subindent = [indent stringByAppendingString: @" "];
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for (id o in asn1Obj.components)
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dump(o,output, subindent);
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} else
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[output appendFormat: @" %@\n", asn1Obj.value];
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} else if([object respondsToSelector: @selector(objectEnumerator)]) {
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[output appendString: indent];
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if ([object isKindOfClass: [NSArray class]])
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[output appendString: @"Sequence:\n"];
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else if ([object isKindOfClass: [NSSet class]])
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[output appendString: @"Set:\n"];
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else
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[output appendFormat: @"%@:\n", [object class]];
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NSString *subindent = [indent stringByAppendingString: @" "];
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for (id o in object)
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dump(o,output, subindent);
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} else {
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[output appendFormat: @"%@%@\n", indent, object];
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}
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}
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+ (NSString*) dump: (id)object {
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NSMutableString *output = [NSMutableString stringWithCapacity: 512];
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dump(object,output,@"");
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return output;
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}
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@end
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@implementation MYASN1BigInteger
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@end
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@implementation MYBitString
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- (id)initWithBits: (NSData*)bits count: (unsigned)bitCount {
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Assert(bits);
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Assert(bitCount <= 8*bits.length);
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self = [super init];
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if (self != nil) {
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_bits = [bits copy];
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_bitCount = bitCount;
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}
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return self;
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}
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+ (MYBitString*) bitStringWithData: (NSData*)bits {
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return [[[self alloc] initWithBits: bits count: 8*bits.length] autorelease];
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}
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- (void) dealloc
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{
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[_bits release];
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[super dealloc];
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}
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@synthesize bits=_bits, bitCount=_bitCount;
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- (NSString*) description {
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return $sprintf(@"%@%@", [self class], _bits);
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}
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- (unsigned) hash {
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return _bits.hash ^ _bitCount;
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}
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- (BOOL) isEqual: (id)object {
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return [object isKindOfClass: [MYBitString class]]
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&& _bitCount==[object bitCount]
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&& [_bits isEqual: [object bits]];
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}
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@end
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