(Objective-C) Encode Integer to Hex or Base64 using N Bytes

Demonstrates how to write an integer to N bytes (little-endian or big-endian) and return the bytes in any encoding such as hex, base64, etc.

Note: This example requires Chilkat v9.5.0.77 or greater.

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#import <CkoCrypt2.h>
#import <NSString.h>

CkoCrypt2 *crypt = [[CkoCrypt2 alloc] init];

// 1193046 decimal is equal to 0x123456 hex.
int value = 1193046;

// Write the integer in 8 bytes using little-endian byte-order and return as hex
BOOL bLittleEndian = YES;
NSString *s = [crypt EncodeInt: [NSNumber numberWithInt: value] numBytes: [NSNumber numberWithInt: 8] littleEndian: bLittleEndian encoding: @"hex"];
// The output is: 5634120000000000
NSLog(@"%@",s);

// Now use big-endian...
bLittleEndian = NO;
s = [crypt EncodeInt: [NSNumber numberWithInt: value] numBytes: [NSNumber numberWithInt: 8] littleEndian: bLittleEndian encoding: @"hex"];
// The output is: 0000000000123456
NSLog(@"%@",s);

// Instead of hex, get the 8 bytes using base64.
s = [crypt EncodeInt: [NSNumber numberWithInt: value] numBytes: [NSNumber numberWithInt: 8] littleEndian: bLittleEndian encoding: @"base64"];
// The output is: AAAAAAASNFY=
NSLog(@"%@",s);