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extern crate crypto; extern crate rand; extern crate base64; use std::str; use rand::{thread_rng, Rng}; use base64::{encode, decode}; use crypto::{symmetriccipher, buffer, aes, blockmodes}; use crypto::buffer::{ReadBuffer, WriteBuffer, BufferResult}; fn aes_256_ecb_encrypt( data: &[u8], key: &[u8], ) -> Result<Vec<u8>, symmetriccipher::SymmetricCipherError> { let mut encryptor = aes::ecb_encryptor(aes::KeySize::KeySize256, key, blockmodes::PkcsPadding); let mut final_result = Vec::<u8>::new(); let mut read_buffer = buffer::RefReadBuffer::new(data); let mut buffer = [0; 4096]; let mut write_buffer = buffer::RefWriteBuffer::new(&mut buffer); loop { let result = try!(encryptor.encrypt(&mut read_buffer, &mut write_buffer, true)); final_result.extend( write_buffer .take_read_buffer() .take_remaining() .iter() .map(|&i| i), ); match result { BufferResult::BufferUnderflow => break, BufferResult::BufferOverflow => {} } } Ok(final_result) } fn aes_256_ecb_decrypt( encrypted_data: &[u8], key: &[u8], ) -> Result<Vec<u8>, symmetriccipher::SymmetricCipherError> { let mut decryptor = aes::ecb_decryptor(aes::KeySize::KeySize256, key, blockmodes::PkcsPadding); let mut final_result = Vec::<u8>::new(); let mut read_buffer = buffer::RefReadBuffer::new(encrypted_data); let mut buffer = [0; 4096]; let mut write_buffer = buffer::RefWriteBuffer::new(&mut buffer); loop { let result = try!(decryptor.decrypt(&mut read_buffer, &mut write_buffer, true)); final_result.extend( write_buffer .take_read_buffer() .take_remaining() .iter() .map(|&i| i), ); match result { BufferResult::BufferUnderflow => break, BufferResult::BufferOverflow => {} } } Ok(final_result) } pub fn encrypt(buf: &[u8], key: &[u8]) -> Result<Vec<u8>, String> { match aes_256_ecb_encrypt(buf, key) { Ok(encrypted_data) => Ok(encode(encrypted_data.as_slice()).into_bytes()), Err(e) => Err(format!("{:?}", e)), } } pub fn decrypt(buf: &[u8], key: &[u8]) -> Result<Vec<u8>, String> { match decode(buf) { Ok(encrypted_data) => { match aes_256_ecb_decrypt(encrypted_data.as_slice(), key) { Ok(decrypted_data) => { Ok(decrypted_data) } Err(e) => Err(format!("{:?}", e)), } } Err(e) => Err(format!("{}", e)), } } pub fn genattr() -> String { format!( "\ * filter=git-mix .gitattributes !filter " ) } pub fn gen(specifed: Option<&str>) -> String { let key; match specifed { Some(s) => key = s.to_string(), None => key = genkey(32), } format!( "\ [filter \"git-mix\"] clean = git-mix encrypt --key {key} smudge = git-mix decrypt --key {key} ", key = key ) } pub fn genkey(len: usize) -> String { thread_rng().gen_ascii_chars().take(len).collect::<String>() }