I am trying to encrypt/decrypt data ios to java & java to ios but I data encrypted in java is not properly decrypted in ios & data encrypted in ios is not properly decrypted in java
- (NSData *) encrypt:(NSData *) dataToEncrypt symmetricKey:(NSData *)symmetricKey context:(CCOperation)encryptOrDecrypt{
NSUInteger data_length= [dataToEncrypt length];
uint8_t input_raw_data[data_length];
//The [dataToEncrypt length] gives the number of chars present in the string.So say there are 10 chars.
//Now,the getBytes needs to get the raw bytes from this i.e. binary NSData.But suppose the encoding was
//full 16 bit encoding then the number of bytes needed wd have been double- 20.But as we are using the
//NSUTF8StringEncoding,the number of byes needed is 1 per char as the chars(even if originally unicode are
//compressed into an 8 bit UTF8 encoding.)
[dataToEncrypt getBytes:&input_raw_data length:data_length];
// [dataToEncrypt getBytes:&input_raw_data maxLength:data_length usedLength:NULL encoding:NSUTF8StringEncoding options:0 range:NSMakeRange(0,data_length) remainingRange:NULL];
//According to the doc: For block ciphers, the output size will always be less than or
//equal to the input size plus the size of one block.
//That's why we need to add the size of one block here
size_t buffer_size = data_length + kCCBlockSizeAES128;
void* buffer = malloc(buffer_size);
size_t num_bytes_encrypted = 0;
CCCryptorStatus crypt_status = CCCrypt(encryptOrDecrypt, kCCAlgorithmAES128, 0x0000,
[symmetricKey bytes], kCCKeySizeAES128,
NULL,
input_raw_data, data_length,
buffer, buffer_size,
&num_bytes_encrypted);
// NSLog(@"~~num bytes encrypted: %d",num_bytes_encrypted);
if (crypt_status == kCCSuccess){
NSLog(@"~~Data encoded successfully...");
return [NSData dataWithBytesNoCopy:buffer length:num_bytes_encrypted];
}
free(buffer); //free the buffer;
return nil;
}
Java Code -
Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
String keyString = "keykeykeykeykeykeykeykey";
byte[] keyBytes = keyString.getBytes("UTF-8");
cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(keyBytes, "AES"), new IvParameterSpec(new byte[16]));
byte[] resultBytes = cipher.doFinal("Hallo Welt!".getBytes("UTF8"));
FileOutputStream out = new FileOutputStream(new File("encryptedFileJava"));
out.write(resultBytes); out.close();
and this is encrypted text - “Se áJbë|8”R ,
key - BW3dKDf2bkDC4Bq9xTdr1g==
Please help me or suggest me any solution.
Thank you.
