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use std::fmt::{self, Debug, Formatter};
use std::io::Result;
pub trait EncryptionKeyManager: Sync + Send {
fn get_file(&self, fname: &str) -> Result<FileEncryptionInfo>;
fn new_file(&self, fname: &str) -> Result<FileEncryptionInfo>;
fn delete_file(&self, fname: &str) -> Result<()>;
fn link_file(&self, src_fname: &str, dst_fname: &str) -> Result<()>;
}
#[derive(Clone, PartialEq, Eq)]
pub struct FileEncryptionInfo {
pub method: EncryptionMethod,
pub key: Vec<u8>,
pub iv: Vec<u8>,
}
impl Default for FileEncryptionInfo {
fn default() -> Self {
FileEncryptionInfo {
method: EncryptionMethod::Unknown,
key: vec![],
iv: vec![],
}
}
}
impl Debug for FileEncryptionInfo {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
write!(
f,
"FileEncryptionInfo [method={:?}, key=...<{} bytes>, iv=...<{} bytes>]",
self.method,
self.key.len(),
self.iv.len()
)
}
}
impl FileEncryptionInfo {
pub fn is_empty(&self) -> bool {
self.key.is_empty() && self.iv.is_empty()
}
}
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
pub enum EncryptionMethod {
Unknown = 0,
Plaintext = 1,
Aes128Ctr = 2,
Aes192Ctr = 3,
Aes256Ctr = 4,
}