(Objective-C) Hash the Contents of a String (SHA256 and other hash algorithms)

Demonstrates how to hash the contents of a string using SHA256, SHA384, SHA512, MD2, MD5, HAVAL, RIPEMD, etc.

Chilkat Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

#import <CkoCrypt2.h>
#import <CkoStringBuilder.h>

// This example requires the Chilkat Crypt API to have been previously unlocked.
// See Unlock Chilkat Crypt for sample code.

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

// Choose the hash algorithm.
// Can be  "sha1", "sha256", "sha384", "sha512", "md2", "md5", "haval", "ripemd128", "ripemd160","ripemd256", or "ripemd320".
crypt.HashAlgorithm = @"sha256";

// The byte representation of the string matters when hashing. 
// Tell Chilkat that we want to use the utf-8 byte representation.
crypt.Charset = @"utf-8";

NSData hashBytes;
hashBytes = [crypt HashString: @"They who can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety."];

// Let's examine the hash as a hex string.
CkoStringBuilder *sb = [[CkoStringBuilder alloc] init];
[sb AppendEncoded: hashBytes encoding: @"hex"];
NSLog(@"%@%@",@"SHA256 hash = ",[sb GetAsString]);