Objective-C

Password_Digest = Base64 (SHA-1 ( nonce + created + SHA-1 (password) ) )

See more Encryption Examples

Demonstrates how to compute:

Password_Digest = Base64 (SHA-1 ( nonce + created + SHA-1 (password)))

Objective-C

#import <NSString.h>
#import <CkoCrypt2.h>
#import <CkoPrng.h>
#import <CkoBinData.h>
#import <CkoDateTime.h>

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

NSString *password = @"secret";

CkoCrypt2 *crypt = [[CkoCrypt2 alloc] init];
crypt.HashAlgorithm = @"SHA-1";
crypt.EncodingMode = @"base64";

//  Generate a 16-byte random nonce
CkoPrng *prng = [[CkoPrng alloc] init];
CkoBinData *bd = [[CkoBinData alloc] init];
[prng GenRandomBd: [NSNumber numberWithInt: 16] bd: bd];

//  Get the current date/time in a string with this format: 2010-06-08T07:26:50Z
CkoDateTime *dt = [[CkoDateTime alloc] init];
[dt SetFromCurrentSystemTime];
NSString *created = [dt GetAsTimestamp: NO];
[bd AppendString: created charset: @"utf-8"];

//  This example wishes to calculate a password digest like this:
//  Password_Digest = Base64 ( SHA-1 ( nonce + created + SHA-1(password) ) )

//  First SHA-1 digest the password...
NSString *passwordSha1 = [crypt HashStringENC: password];
//  Append the 20 binary bytes of the SHA1 hash to bd, which already contains the nonce and created date/time.
[bd AppendEncoded: passwordSha1 encoding: @"base64"];

NSString *passwordDigest = [crypt HashBdENC: bd];

NSLog(@"%@%@",@"Base64 password digest = ",passwordDigest);