AES symmetric encryption for iOS system methods

Nonsense not much to say, directly on the code:

Header file:

#import <Foundation/Foundation.h> @class nsstring, @interface nsdata (encryption)-(NSData *) Aes256parmencryptwithkey: (NSString *) key;   Encryption-(NSData *) Aes256parmdecryptwithkey: (NSString *) key;   Decryption @end

. m implementation file:

#import "Encryption.h" #import <CommonCrypto/CommonCryptor.h> @implementation NSData (encryption)-(NSData *)    Aes256parmencryptwithkey: (NSString *) key//encryption {char keyptr[kcckeysizeaes256+1];    Bzero (keyptr, sizeof (KEYPTR));    [Key Getcstring:keyptr maxlength:sizeof (KEYPTR) encoding:nsutf8stringencoding];    Nsuinteger datalength = [self length];    size_t buffersize = datalength + kCCBlockSizeAES128;    void *buffer = malloc (buffersize);    size_t numbytesencrypted = 0; Cccryptorstatus cryptstatus = Cccrypt (Kccencrypt, kCCAlgorithmAES128, KCCOPTIONPK cs7padding |                                          Kccoptionecbmode, Keyptr, kCCBlockSizeAES128, NULL, [self bytes], datalength, BU    Ffer, buffersize, &numbytesencrypted); if (Cryptstatus = = kccsuccess) {return[NSData Datawithbytesnocopy:buffer length:numbytesencrypted];    } free (buffer); return nil;}    -(NSData *) Aes256parmdecryptwithkey: (NSString *) key//decryption {char keyptr[kcckeysizeaes256+1];    Bzero (keyptr, sizeof (KEYPTR));    [Key Getcstring:keyptr maxlength:sizeof (KEYPTR) encoding:nsutf8stringencoding];    Nsuinteger datalength = [self length];    size_t buffersize = datalength + kCCBlockSizeAES128;    void *buffer = malloc (buffersize);    size_t numbytesdecrypted = 0; Cccryptorstatus cryptstatus = Cccrypt (Kccdecrypt, kCCAlgorithmAES128, KCCOPTIONPK cs7padding |                                          Kccoptionecbmode, Keyptr, kCCBlockSizeAES128, NULL, [self bytes], datalength, BU    Ffer, buffersize, &numbytesdecrypted); if (Cryptstatus = = kccsuccess) {return [NSData Datawithbytesnocopy:buffer length:numbytesdecrypted];    } free (buffer); return nil;}