CCCryptorStatus CCCrypt(

    CCOperation op,            /* kCCEncrypt, etc. */

    CCAlgorithm alg,        /* kCCAlgorithmAES128, etc. */

    CCOptions options,        /* kCCOptionPKCS7Padding, etc. */

    const void *key,

    size_t keyLength,

    const void *iv,            /* optional initialization vector */

    const void *dataIn,        /* optional per op and alg */

    size_t dataInLength,

    void *dataOut,            /* data RETURNED here */

    size_t dataOutAvailable,

    size_t *dataOutMoved);
    

enum {

kCCAlgorithmAES128 = ,

kCCAlgorithmDES,

kCCAlgorithm3DES,

kCCAlgorithmCAST,

kCCAlgorithmRC4,

kCCAlgorithmRC2

};