Function openssl_sys::PKCS5_PBKDF2_HMAC

pub unsafe extern fn PKCS5_PBKDF2_HMAC(pass: *const c_char,
                                       passlen: c_int,
                                       salt: *const c_uchar,
                                       saltlen: c_int,
                                       iter: c_int,
                                       digest: *const EVP_MD,
                                       keylen: c_int,
                                       out: *mut u8)
                                       -> c_int