Objective-C

Simple AES ECB Decryption

See more Encryption Examples

Decrypt 256-bit encrypted content. Objective-C

#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];

//  Encrypted content (base64-encoded)
NSString *ct = @"d/95VziAnUNKkpXr3dJBFcQqAEDWlDkc7EU2jLkYPxmr6PpLRJlgHos+/Uy28CvJsmztQ3JkJAMukVoj46QJ/7RMuqLb31cSKd1ZvMzx9J9b6q0EkmPJcSfBhf2x7v5Qvq3lz1EIH7RM61cDGf+g9p4lt6FtU2MzCqtYD+Vr29voCn5WU1CnXmks64RrbyDA1DDHOx2deJ4Kn68+KoPM9tAw9kbf4HApL1nJYU3Mfzl+MnuHuB2kJpL5GqbuNvS+4QjxuwtNGuZEEY0gOS4RIvWl/XfkxtWHMkzsKy08AO792xDGer4rL4Q1NcfI/H2V";

//  256-bit AES key (literally the 32 us-ascii bytes of this string)
NSString *key = @"sQsPQYesBM5qEM5OSxicFatIiLM459Bu";

//  Note: If your AES key is a string, and it's not clearly hex or base64, AND if the length of the string is the exact size of the AES key,
//  then *literally* use the ascii chars as the AES key.

crypt.CryptAlgorithm = @"aes";
crypt.CipherMode = @"ecb";
crypt.KeyLength = [NSNumber numberWithInt:256];
//  use the exact ascii bytes as the key.
[crypt SetEncodedKey: key encoding: @"ascii"];
crypt.EncodingMode = @"base64";

NSString *pt = [crypt DecryptStringENC: ct];

NSLog(@"%@",pt);