Question

In my application I am using encryption and decryption.

Before entering the string in to local database, I am encrypting that and after fetching the data from database I am decrypting it and using in my application.
It is working fine. I have used encryption/decryption from
link below

At the time of Encrypting:

    NSString *myKey=@"any string more than 8 char";

    NSData *data ; 
    NSData *encryptedData; 
    NSString *encryptPassword,*encryptPasscode;

    // 1) Encrypt

    data = [password dataUsingEncoding: NSASCIIStringEncoding];
    encryptedData = [data AESEncryptWithPassphrase:myKey];

    // 2) Encode Base 64

    [Base64 initialize];
    encryptPassword = [Base64 encode:encryptedData];

At the time of Decrypting :

    NSData *decryptedData;
    NSData  *b64DecData;

    field1 = (char *) sqlite3_column_text(selectPasscodeStatement, 0);
    NSString *fieldStr1 = [[NSString alloc] initWithUTF8String: field1];

     // 3) Decode Base 64

      b64DecData = [Base64 decode:fieldStr1];

     // 4) Decrypt

       decryptedData = [b64DecData AESDecryptWithPassphrase:myKey];

       retrivedPasscode = [[NSString alloc] initWithData:decryptedData encoding:NSASCIIStringEncoding];

But I have made staticLibrary of that same project. I am using that staticLibrary in another project. When I run that project, at the time of encrypting it gave me error below

-[NSConcreteMutableData AESEncryptWithPassphrase:]: unrecognized selector sent to instance 0x6a3fe40

Answer 1

You need to make change in the Build Settings of the project which will link the static library with the main project.
Follow these steps:

1)Click on Build Settings tab.

2)Search for “Other Linker Flags”.

3)Add ‘-all_load’ flag to it.

4)Build and run the project.

It worked fine for me.