//

//  MYASN1Object.h

//  MYCrypto-iPhone

//

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

//  Copyright 2009 Jens Alfke. All rights reserved.

//

#import <Foundation/Foundation.h>

/* A generic ASN.1 data value. The BER parser instantiates these to represent parsed values that

    it doesn't know how to represent otherwise.

    This is mostly used internally by MYParsedCertificate. */

@interface MYASN1Object : NSObject

{

    @private

    uint32_t _tag;

    uint8_t _tagClass;

    BOOL _constructed;

    NSData *_value;

    NSArray *_components;

}

- (id) initWithTag: (uint32_t)tag

           ofClass: (uint8_t)tagClass 

       constructed: (BOOL)constructed

             value: (NSData*)value;

- (id) initWithTag: (uint32_t)tag

           ofClass: (uint8_t)tagClass 

        components: (NSArray*)components;

@property (readonly) uint32_t tag;

@property (readonly) uint8_t tagClass;

@property (readonly) BOOL constructed;

@property (readonly) NSData *value;

@property (readonly) NSArray *components;

+ (NSString*) dump: (id)object;

@end

/* An ASN.1 "big" (arbitrary-length) integer.

    The value contains the bytes of the integer, in big-endian order.

    This is mostly used internally by MYParsedCertificate. */

@interface MYASN1BigInteger : MYASN1Object

- (id) initWithSignedData: (NSData*)signedData;

- (id) initWithUnsignedData: (NSData*) unsignedData;

@property (readonly) NSData *signedData, *unsignedData;

@end

/* An ordered string of bits, as used in ASN.1.

    This differs from NSData in that it need not occupy a whole number of bytes;

    that is, the number of bits need not be a multiple of 8.

    This is mostly used internally by MYParsedCertificate. */

@interface MYBitString : NSObject 

{

    @private

    NSData *_bits;

    NSUInteger _bitCount;

}

- (id)initWithBits: (NSData*)bits count: (NSUInteger)bitCount;

+ (MYBitString*) bitStringWithData: (NSData*)bits;

@property (readonly, nonatomic) NSData *bits;

@property (readonly, nonatomic) NSUInteger bitCount;

@end