I Want AES erstellen 128 CFB-Verschlüsselung, ohne Padding in Objective-C mit

Question

I AES erstellen möchten 128 CFB-Verschlüsselung, ohne Padding dh

Beispiel 1: Geheimdaten ist "HALLO WELT" Schlüssel: 10 A5 88 69 D7 4B E5 A3 74 CF 86 7C FB 47 38 59 IV: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Klartext (unverschlüsselt): 48 45 4C 4C 4F 20 57 4F 52 4C 44 verschlüsselter Text: 25 60 52 25 0B 90 06 AF-1C E6 2B

Aber ich bin immer Encrypted Hex St Ring == d. h. keine Zeichenfolge. Meine Verschlüsselung wird erfolgreich, aber keine verschlüsselten Daten. Irgendwelche Vorschläge?

hier ist der Code:

NSData *commandData = [@"HELLO WORLD" dataUsingEncoding:NSASCIIStringEncoding]; 
calling Method [commandData AES128OperationWithCreate:kCCEncrypt key:@"10a58869d74be5a374cf867cfb473859" iv:@"00000000000000000000000000000000"] 

@implementation NSData (AES) 
- (NSData *)AES128OperationWithCreate:(CCOperation)operation key:(NSString *)key iv:(NSString *)iv{ 
char ivPtr[kCCBlockSizeAES128 + 1]; 
      bzero(ivPtr, sizeof(ivPtr)); 
      if (iv) { 
       [iv getCString:ivPtr maxLength:sizeof(ivPtr) encoding:NSUTF8StringEncoding]; 
      } 

      char keyPtr[kCCKeySizeAES128 + 1]; 
      bzero(keyPtr, sizeof(keyPtr)); 
      [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding]; 


      CCCryptorRef cryptor = NULL; 
      CCCryptorStatus result = CCCryptorCreateWithMode(operation, 
                  kCCModeCFB, 
                  kCCAlgorithmAES128, 
                  ccNoPadding, 
                  ivPtr, 
                  keyPtr, 
                  kCCKeySizeAES128, 
                  NULL, 
                  0, 
                  0, 
                  0, 
                  &cryptor); 

      if (result != kCCSuccess) { 

       NSLog(@"encryptAESCTRData: createWithMode error: %@", @(result)); 
       result = CCCryptorRelease(cryptor); 
       return nil; 
      } 
      size_t bufferLength = CCCryptorGetOutputLength(cryptor, [self length], true); 
      NSMutableData *buffer = [NSMutableData dataWithLength:bufferLength]; 
      NSMutableData *cipherData = [NSMutableData data]; 

      size_t outLength; 
      result = CCCryptorUpdate(cryptor, 
            [self bytes], 
            [self length], 
            [buffer mutableBytes], 
            [buffer length], 
            &outLength); 

      // FIXME: Release cryptor and return error 
      if (result != kCCSuccess) { 

       NSLog(@"encryptAESCTRData: CCCryptorUpdate error: %@", @(result)); 
       result = CCCryptorRelease(cryptor); 
       return nil; 
      } 

      result = CCCryptorFinal(cryptor, 
            [buffer mutableBytes], 
            [buffer length], 
            &outLength); 

      // FIXME: Release cryptor and return error 
      if (result != kCCSuccess) { 

       NSLog(@"encryptAESCTRData: CCCryptorFinal error: %@", @(result)); 
       result = CCCryptorRelease(cryptor); 
       return nil; 
      } 
      [cipherData appendBytes:buffer.bytes length:outLength]; 
      return cipherData; 
      //return [NSData dataWithBytesNoCopy:(__bridge void * _Nonnull)(buffer) length:outLength freeWhenDone:YES]; 
     } 

Answer 1

ich das gelöst haben mit dieser Methode

- (NSData *)AES128OperationWithEncriptionMode:(CCOperation)operation key:(NSData *)key iv:(NSData *)iv { 


    CCCryptorRef cryptor = NULL; 
    // 1. Create a cryptographic context. 
    CCCryptorStatus status = CCCryptorCreateWithMode(operation, kCCModeCFB, kCCAlgorithmAES, ccNoPadding, [iv bytes], [key bytes], [key length], NULL, 0, 0, kCCModeOptionCTR_BE, &cryptor); 

    NSAssert(status == kCCSuccess, @"Failed to create a cryptographic context."); 

    NSMutableData *retData = [NSMutableData new]; 

    // 2. Encrypt or decrypt data. 
    NSMutableData *buffer = [NSMutableData data]; 
    [buffer setLength:CCCryptorGetOutputLength(cryptor, [self length], true)]; // We'll reuse the buffer in -finish 

    size_t dataOutMoved; 
    status = CCCryptorUpdate(cryptor, self.bytes, self.length, buffer.mutableBytes, buffer.length, &dataOutMoved); 
    NSAssert(status == kCCSuccess, @"Failed to encrypt or decrypt data"); 
    [retData appendData:[buffer subdataWithRange:NSMakeRange(0, dataOutMoved)]]; 

    // 3. Finish the encrypt or decrypt operation. 
    status = CCCryptorFinal(cryptor, buffer.mutableBytes, buffer.length, &dataOutMoved); 
    NSAssert(status == kCCSuccess, @"Failed to finish the encrypt or decrypt operation"); 
    [retData appendData:[buffer subdataWithRange:NSMakeRange(0, dataOutMoved)]]; 
    CCCryptorRelease(cryptor); 

    return [retData copy]; 
}