1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22

extern "C" {
    fn crypto_encrypt(ptr: i32, len: i32) -> i32;
    fn crypto_decrypt(ptr: i32, len: i32) -> i32;
}

/// Encrypt a string. The encryption is done in host, and host manages the encryption
/// key. This function should be used if you want to store sensitive data in the
/// database.
pub fn encrypt(input: &str) -> String {
    let (ptr, len) = ft_sys::memory::string_to_bytes_ptr(input.to_owned());
    let ptr = unsafe { crypto_encrypt(ptr, len) };
    ft_sys::memory::string_from_ptr(ptr)
}

/// Decrypt a string. The decryption is done in host, and host manages the decryption
/// key. This function should be used if you want to retrieve encrypted sensitive data
/// from the database.
pub fn decrypt(input: &str) -> Result<String, ft_sys::DecryptionError> {
    let (ptr, len) = ft_sys::memory::string_to_bytes_ptr(input.to_owned());
    let ptr = unsafe { crypto_decrypt(ptr, len) };
    ft_sys::memory::json_from_ptr(ptr)
}