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MYASN1Object.m
author Jens Alfke <jens@mooseyard.com>
Thu Jun 04 18:36:30 2009 -0700 (2009-06-04)
changeset 19 f6c91b9da05b
parent 17 90a70925562b
child 20 df9da0f6b358
permissions -rw-r--r--
Whew! MYParsedCertificate can now generate certs from scratch. Also added improvements and fixes to the BER/DER codecs. 
     1 //

     2 //  MYASN1Object.m

     3 //  MYCrypto-iPhone

     4 //

     5 //  Created by Jens Alfke on 5/28/09.

     6 //  Copyright 2009 Jens Alfke. All rights reserved.

     7 //

     8 

     9 #import "MYASN1Object.h"

    10 

    11 

    12 @implementation MYASN1Object

    13 

    14 

    15 - (id) initWithTag: (uint32_t)tag

    16            ofClass: (uint8_t)tagClass 

    17        constructed: (BOOL)constructed

    18              value: (NSData*)value

    19 {

    20     Assert(value);

    21     self = [super init];

    22     if (self != nil) {

    23         _tag = tag;

    24         _tagClass = tagClass;

    25         _constructed = constructed;

    26         _value = [value copy];

    27     }

    28     return self;

    29 }

    30 

    31 - (id) initWithTag: (uint32_t)tag

    32            ofClass: (uint8_t)tagClass 

    33         components: (NSArray*)components

    34 {

    35     Assert(components);

    36     self = [super init];

    37     if (self != nil) {

    38         _tag = tag;

    39         _tagClass = tagClass;

    40         _constructed = YES;

    41         _components = [components copy];

    42     }

    43     return self;

    44 }

    45 

    46 - (void) dealloc

    47 {

    48     [_value release];

    49     [_components release];

    50     [super dealloc];

    51 }

    52 

    53 

    54 @synthesize tag=_tag, tagClass=_tagClass, constructed=_constructed, value=_value, components=_components;

    55 

    56 

    57 - (NSString*)description {

    58     if (_components)

    59         return $sprintf(@"%@[%hhu/%u/%u]%@", self.class, _tagClass,(unsigned)_constructed,_tag, _components);

    60     else

    61         return $sprintf(@"%@[%hhu/%u/%u, %u bytes]", self.class, _tagClass,(unsigned)_constructed,_tag, _value.length);

    62 }

    63 

    64 - (BOOL) isEqual: (id)object {

    65     return [object isKindOfClass: [MYASN1Object class]] 

    66         && _tag==[object tag] 

    67         && _tagClass==[object tagClass] 

    68         && _constructed==[object constructed] 

    69         && $equal(_value,[object value])

    70         && $equal(_components,[object components]);

    71 }

    72 

    73 static void dump(id object, NSMutableString *output, NSString *indent) {

    74     if ([object isKindOfClass: [MYASN1Object class]]) {

    75         MYASN1Object *asn1Obj = object;

    76         [output appendFormat: @"%@%@[%hhu/%u]", indent, asn1Obj.class, asn1Obj.tagClass,asn1Obj.tag];

    77         if (asn1Obj.components) {

    78             [output appendString: @":\n"];

    79             NSString *subindent = [indent stringByAppendingString: @"    "];

    80             for (id o in asn1Obj.components)

    81                 dump(o,output, subindent);

    82         } else

    83             [output appendFormat: @" %@\n", asn1Obj.value];

    84     } else if([object respondsToSelector: @selector(objectEnumerator)]) {

    85         [output appendString: indent];

    86         if ([object isKindOfClass: [NSArray class]])

    87             [output appendString: @"Sequence:\n"];

    88         else if ([object isKindOfClass: [NSSet class]])

    89             [output appendString: @"Set:\n"];

    90         else

    91             [output appendFormat: @"%@:\n", [object class]];

    92         NSString *subindent = [indent stringByAppendingString: @"    "];

    93         for (id o in object)

    94             dump(o,output, subindent);

    95     } else {

    96         [output appendFormat: @"%@%@\n", indent, object];

    97     }

    98 }

    99 

   100 + (NSString*) dump: (id)object {

   101     NSMutableString *output = [NSMutableString stringWithCapacity: 512];

   102     dump(object,output,@"");

   103     return output;

   104 }

   105 

   106 

   107 @end

   108 

   109 

   110 

   111 @implementation MYASN1BigInteger

   112 

   113 @end

   114 

   115 

   116 

   117 @implementation MYBitString

   118 

   119 

   120 - (id)initWithBits: (NSData*)bits count: (unsigned)bitCount {

   121     Assert(bits);

   122     Assert(bitCount <= 8*bits.length);

   123     self = [super init];

   124     if (self != nil) {

   125         _bits = [bits copy];

   126         _bitCount = bitCount;

   127     }

   128     return self;

   129 }

   130 

   131 + (MYBitString*) bitStringWithData: (NSData*)bits {

   132     return [[[self alloc] initWithBits: bits count: 8*bits.length] autorelease];

   133 }

   134 

   135 - (void) dealloc

   136 {

   137     [_bits release];

   138     [super dealloc];

   139 }

   140 

   141 @synthesize bits=_bits, bitCount=_bitCount;

   142 

   143 - (NSString*) description {

   144     return $sprintf(@"%@%@", [self class], _bits);

   145 }

   146 

   147 - (unsigned) hash {

   148     return _bits.hash ^ _bitCount;

   149 }

   150 

   151 - (BOOL) isEqual: (id)object {

   152     return [object isKindOfClass: [MYBitString class]] 

   153         && _bitCount==[object bitCount] 

   154         && [_bits isEqual: [object bits]];

   155 }

   156 

   157 @end
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