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//AES加密解密
#import 
#import 

//AES128位加密 base64编码 注：kCCKeySizeAES128点进去可以更换256位加密-(NSString *)AES128Encrypt:(NSString *)plainText key:(NSString *)key    char keyPtr[kCCKeySizeAES128+1];//    memset(keyPtr, 0, sizeof(keyPtr));    [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];        NSData* data = [plainText dataUsingEncoding:NSUTF8StringEncoding];    NSUInteger dataLength = [data length];        size_t bufferSize = dataLength + kCCBlockSizeAES128;    void *buffer = malloc(bufferSize);    size_t numBytesEncrypted = 0;    CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt,                                          kCCAlgorithmAES128,                                          kCCOptionPKCS7Padding|kCCOptionECBMode,                                          keyPtr,                                          kCCBlockSizeAES128,                                          NULL,                                          [data bytes],                                          dataLength,                                          buffer,                                          bufferSize,                                          &numBytesEncrypted);    if (cryptStatus == kCCSuccess)         NSData *resultData = [NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted];                NSString *stringBase64 = [resultData base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithLineFeed]; // base64格式的字符串        return stringBase64;                free(buffer);    return nil;//解密-(NSString *)AES128Decrypt:(NSString *)encryptText key:(NSString *)key    char keyPtr[kCCKeySizeAES128 + 1];    memset(keyPtr, 0, sizeof(keyPtr));    [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];        NSData *data = [[NSData alloc] initWithBase64EncodedString:encryptText options:NSDataBase64DecodingIgnoreUnknownCharacters];//base64解码        NSUInteger dataLength = [data length];    size_t bufferSize = dataLength + kCCBlockSizeAES128;    void *buffer = malloc(bufferSize);        size_t numBytesCrypted = 0;    CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt,                                          kCCAlgorithmAES128,                                          kCCOptionPKCS7Padding|kCCOptionECBMode,                                          keyPtr,                                          kCCBlockSizeAES128,                                          NULL,                                          [data bytes],                                          dataLength,                                          buffer,                                          bufferSize,                                          &numBytesCrypted);    if (cryptStatus == kCCSuccess)         NSData *resultData = [NSData dataWithBytesNoCopy:buffer length:numBytesCrypted];                return [[NSString alloc] initWithData:resultData encoding:NSUTF8StringEncoding];        free(buffer);    return nil;

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