openethereum/ethstore/src/presale.rs

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use std::fs;
use std::path::Path;
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use rcrypto::pbkdf2::pbkdf2;
use rcrypto::sha2::Sha256;
use rcrypto::hmac::Hmac;
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use json;
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use ethkey::{Address, Secret, KeyPair};
use crypto::Keccak256;
use {crypto, Error};
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pub struct PresaleWallet {
iv: [u8; 16],
ciphertext: Vec<u8>,
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address: Address,
}
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impl From<json::PresaleWallet> for PresaleWallet {
fn from(wallet: json::PresaleWallet) -> Self {
let mut iv = [0u8; 16];
iv.copy_from_slice(&wallet.encseed[..16]);
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let mut ciphertext = vec![];
ciphertext.extend_from_slice(&wallet.encseed[16..]);
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PresaleWallet {
iv: iv,
ciphertext: ciphertext,
address: Address::from(wallet.address),
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}
}
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}
impl PresaleWallet {
pub fn open<P>(path: P) -> Result<Self, Error> where P: AsRef<Path> {
let file = try!(fs::File::open(path));
let presale = try!(json::PresaleWallet::load(file)
.map_err(|e| Error::InvalidKeyFile(format!("{}", e))));
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Ok(PresaleWallet::from(presale))
}
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pub fn decrypt(&self, password: &str) -> Result<KeyPair, Error> {
let mut h_mac = Hmac::new(Sha256::new(), password.as_bytes());
let mut derived_key = vec![0u8; 16];
pbkdf2(&mut h_mac, password.as_bytes(), 2000, &mut derived_key);
let mut key = vec![0; self.ciphertext.len()];
let len = try!(crypto::aes::decrypt_cbc(&derived_key, &self.iv, &self.ciphertext, &mut key).map_err(|_| Error::InvalidPassword));
let unpadded = &key[..len];
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let secret = Secret::from(unpadded.keccak256());
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if let Ok(kp) = KeyPair::from_secret(secret) {
if kp.address() == self.address {
return Ok(kp)
}
}
Err(Error::InvalidPassword)
}
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}
#[cfg(test)]
mod tests {
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use super::PresaleWallet;
use json;
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#[test]
fn test() {
let json = r#"
{
"encseed": "137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dedb3bc0a9ac6c79b9c426c5878ca2c9d06ff42a23cb648312fc32ba83649de0928e066",
"ethaddr": "ede84640d1a1d3e06902048e67aa7db8d52c2ce1",
"email": "123@gmail.com",
"btcaddr": "1JvqEc6WLhg6GnyrLBe2ztPAU28KRfuseH"
} "#;
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let wallet = json::PresaleWallet::load(json.as_bytes()).unwrap();
let wallet = PresaleWallet::from(wallet);
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assert!(wallet.decrypt("123").is_ok());
assert!(wallet.decrypt("124").is_err());
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}
}