我想在目标c中使用无填充的CFBencryption来创buildAES 128

我想使用无填充的CFBencryption来创buildAES 128

样本1：秘密数据是“HELLO WORLD”键：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明文（未encryption）：48 45 4C 4C 4F 20 57 4F 52 4C 44encryption文本：25 60 52 25 0B 90 06 AF 1C E6 2B

但我得到encryptionhexstring==即没有string。 我的encryption获得成功，但没有encryption的数据任何build议？

这里是代码：

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

我已经通过使用这种方法解决了

 - (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]; }