(Objective-C) HMAC SHA-1 to Match RFC 2022 Test Vectors

Demonstrates using Chilkat in Objective-C to computer HMAC SHA-1 message authentication codes to match the test vectors given by RFC 2202.

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

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

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

// The output will be Hex, so set the EncodingMode:
crypt.EncodingMode = @"hex";

// Set the hash algorithm:
// Choices are: md5, sha-1, sha256, sha384, sha512, md2, haval
crypt.HashAlgorithm = @"sha-1";

NSString *mac = 0;

// Set the HMAC key:
[crypt SetHmacKeyEncoded: @"0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b" encoding: @"hex"];
mac = [crypt HmacStringENC: @"Hi There"];
NSLog(@"%@",mac);

[crypt SetHmacKeyEncoded: @"Jefe" encoding: @"ansi"];
mac = [crypt HmacStringENC: @"what do ya want for nothing?"];
NSLog(@"%@",mac);