I'm using AES Encryption and Decryption in my project which is an apple watch project. So for encryption and decryption I created one category for NSData, And I'm calling those methods in my sample view controller class. Its working fine.
And then Now I copied the same code in to my ServerManager class where I should do actual encryption. But it is showing me this error.
Crash with Error :
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSConcreteData AES256EncryptWithKey:]: unrecognized selector sent to instance 0x7ab084a0'
The same code is working in sample code and it is showing me this error in my actual project. I didn't understand what could be the reason. I never heard about NSConcreteData. also. Here is my code follows.
In My ServerManager Class :
NSError *err;
NSDictionary *dict = @{@"accountType":@"ALL",@"uId":@"c8ff46be-a083-40
09-8a33-fc2d22cc40e3|123456784",@"deviceId":@"qvxy1234"};
NSData * jsonData = [NSJSONSerialization dataWithJSONObject:dict options:0 error:&err];
NSString *encryptedData = [[jsonData AES256EncryptWithKey:kABAESCryptionKey] base64EncodedStringWithOptions:0];
NSLog(@"%@",encryptedData);
NSData *nsdataFromBase64String = [[NSData alloc]
initWithBase64EncodedString:encryptedData options:0];
and NSData+CustomCategory Class is like this :
- (NSData *)AES256EncryptWithKey:(NSString *)key {
return [self AES256Operation:kCCEncrypt key:key];
}
- (NSData *)AES256DecryptWithKey:(NSString *)key {
return [self AES256Operation:kCCDecrypt key:key];
}
/*!
* @brief Common method for encrypt and decrypt
* @param Operation : pass required crypto CCOperation type
* @param key : pass key based on which crption is done
* @returns NSData object : Encrypted or Decrypted data
*/
- (NSData *)AES256Operation:(CCOperation)operation key:(NSString *)key {
// 'key' should be 32 bytes for AES256, will be null-padded otherwise
char keyPtr[kCCKeySizeAES256+1];
bzero(keyPtr, sizeof(keyPtr)); // fill with zeroes (for padding)
// fetch key data
[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
NSUInteger dataLength = [self length];
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void *buffer = malloc(bufferSize);
size_t numBytesCrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(operation, kCCAlgorithmAES128, kCCOptionPKCS7Padding,
keyPtr, kCCKeySizeAES256,
NULL /* initialization vector (optional) */,
[self bytes], dataLength, /* input */
buffer, bufferSize, /* output */
&numBytesCrypted);
if (cryptStatus == kCCSuccess) {
return [NSData dataWithBytesNoCopy:buffer length:numBytesCrypted];
}
free(buffer); //free the buffer
return nil;
}
The same code is working in sample but not in my real project...
Addition :
It is not because of base64EncodedStringWithOptions: method.
I tried like this also
NSData *encryptedData = [jsonData AES256EncryptWithKey:kABAESCryptionKey];
So this code is also crashing, So I'm sure the problem is not with base64EncodedStringWithOptions:? some thing is going wrong while I'm using in IWatch extension classes.
Here the kABAESCryptionKey is a proper key which is working fine. in Sample example.
