iOS AES258 CFB模式

代码：

+ (NSData *)CBCWithOperation:(CCOperation)operation andIv:(NSString *)ivString andKey:(NSString *)keyString andInput:(NSData *)inputData

{

const char *iv = [[ivString dataUsingEncoding: NSUTF8StringEncoding] bytes]; const char *key = [[keyString dataUsingEncoding: NSUTF8StringEncoding] bytes];

CCCryptorRef cryptor;

CCCryptorCreateWithMode(operation, kCCModeCFB, kCCAlgorithmAES, ccNoPadding, iv, key, [keyString length], NULL, 0, 0, 0, &cryptor);

NSUInteger inputLength = inputData.length;

char *outData = malloc(inputLength);

memset(outData, 0, inputLength);

size_t outLength = 0;

CCCryptorUpdate(cryptor, inputData.bytes, inputLength, outData, inputLength, &outLength);

NSData *data = [NSData dataWithBytes: outData length: outLength];

CCCryptorRelease(cryptor);

free(outData);

return data;

}

+ (NSString *)encryptAESCBC:(NSString *)inputString

{

NSMutableData *inputData = [NSMutableData dataWithData: [inputString dataUsingEncoding: NSUTF8StringEncoding]];

NSData *outData = [self CBCWithOperation: kCCEncrypt andIv: 你的偏移量 andKey:加密密钥 andInput: inputData];

outData = [outData base64EncodedDataWithOptions: NSDataBase64EncodingEndLineWithLineFeed];

return [[NSString alloc] initWithData: outData encoding: NSUTF8StringEncoding] ?: @"";

}

调用：[控制器  encryptAESCBC:字符串];