importing presale wallet (#1368)

* importing presale wallet in progress

* PresaleWallet data structure

ethstore/src/crypto.rs

@@ -65,8 +65,8 @@ impl Keccak256<[u8; 32]> for [u8] {
 
 /// AES encryption
 pub mod aes {
-	use rcrypto::blockmodes::CtrMode;
+	use rcrypto::blockmodes::{CtrMode, CbcDecryptor, PkcsPadding};
-	use rcrypto::aessafe::AesSafe128Encryptor;
+	use rcrypto::aessafe::{AesSafe128Encryptor, AesSafe128Decryptor};
 	use rcrypto::symmetriccipher::{Encryptor, Decryptor};
 	use rcrypto::buffer::{RefReadBuffer, RefWriteBuffer};
 
@@ -81,5 +81,12 @@ pub mod aes {
 		let mut encryptor = CtrMode::new(AesSafe128Encryptor::new(k), iv.to_vec());
 		encryptor.decrypt(&mut RefReadBuffer::new(encrypted), &mut RefWriteBuffer::new(dest), true).expect("Invalid length or padding");
 	}
+
+	/// Decrypt a message using cbc mode
+	pub fn decrypt_cbc(k: &[u8], iv: &[u8], encrypted: &[u8], dest: &mut [u8]) {
+		let mut encryptor = CbcDecryptor::new(AesSafe128Decryptor::new(k), PkcsPadding, iv.to_vec());
+		encryptor.decrypt(&mut RefReadBuffer::new(encrypted), &mut RefWriteBuffer::new(dest), true).expect("Invalid length or padding");
+	}
+
 }
 

ethstore/src/ethkey.rs

@@ -31,3 +31,11 @@ impl From<json::H160> for Address {
 		From::from(a)
 	}
 }
+
+impl<'a> From<&'a json::H160> for Address {
+	fn from(json: &'a json::H160) -> Self {
+		let mut a = [0u8; 20];
+		a.copy_from_slice(json);
+		From::from(a)
+	}
+}

ethstore/src/json/hash.rs

@@ -14,6 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
+use std::fmt;
+use std::ops;
 use std::str::FromStr;
 use rustc_serialize::hex::{FromHex, ToHex};
 use serde::{Serialize, Serializer, Deserialize, Deserializer, Error as SerdeError};
@@ -22,9 +24,31 @@ use super::Error;
 
 macro_rules! impl_hash {
 	($name: ident, $size: expr) => {
-		#[derive(Debug, PartialEq)]
 		pub struct $name([u8; $size]);
 
+		impl fmt::Debug for $name {
+			fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
+				let self_ref: &[u8] = &self.0;
+				write!(f, "{:?}", self_ref)
+			}
+		}
+
+		impl PartialEq for $name {
+			fn eq(&self, other: &Self) -> bool {
+				let self_ref: &[u8] = &self.0;
+				let other_ref: &[u8] = &other.0;
+				self_ref == other_ref
+			}
+		}
+
+		impl ops::Deref for $name {
+			type Target = [u8];
+
+			fn deref(&self) -> &Self::Target {
+				&self.0
+			}
+		}
+
 		impl Serialize for $name {
 			fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
 			where S: Serializer {
@@ -85,3 +109,4 @@ macro_rules! impl_hash {
 impl_hash!(H128, 16);
 impl_hash!(H160, 20);
 impl_hash!(H256, 32);
+impl_hash!(H768, 96);

ethstore/src/json/mod.rs.in

@@ -5,14 +5,16 @@ mod hash;
 mod id;
 mod kdf;
 mod key_file;
+mod presale;
 mod version;
 
 pub use self::cipher::{Cipher, CipherSer, CipherSerParams, Aes128Ctr};
 pub use self::crypto::Crypto;
 pub use self::error::Error;
-pub use self::hash::{H128, H160, H256};
+pub use self::hash::{H128, H160, H256, H768};
 pub use self::id::UUID;
 pub use self::kdf::{Kdf, KdfSer, Prf, Pbkdf2, Scrypt, KdfSerParams};
 pub use self::key_file::KeyFile;
+pub use self::presale::PresaleWallet;
 pub use self::version::Version;
 

ethstore/src/json/presale.rs

@@ -0,0 +1,42 @@
+use std::io::Read;
+use serde_json;
+use super::{H160, H768};
+
+#[derive(Debug, PartialEq, Deserialize)]
+pub struct PresaleWallet {
+	pub encseed: H768,
+	#[serde(rename = "ethaddr")]
+	pub address: H160,
+}
+
+impl PresaleWallet {
+	pub fn load<R>(reader: R) -> Result<Self, serde_json::Error> where R: Read {
+		serde_json::from_reader(reader)
+	}
+}
+
+#[cfg(test)]
+mod tests {
+	use std::str::FromStr;
+	use serde_json;
+	use json::{PresaleWallet, H160, H768};
+
+	#[test]
+	fn presale_wallet() {
+		let json = r#"
+		{
+			"encseed": "137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dedb3bc0a9ac6c79b9c426c5878ca2c9d06ff42a23cb648312fc32ba83649de0928e066",
+			"ethaddr": "ede84640d1a1d3e06902048e67aa7db8d52c2ce1",
+			"email": "123@gmail.com",
+			"btcaddr": "1JvqEc6WLhg6GnyrLBe2ztPAU28KRfuseH"
+		} "#;
+
+		let expected = PresaleWallet {
+			encseed: H768::from_str("137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dedb3bc0a9ac6c79b9c426c5878ca2c9d06ff42a23cb648312fc32ba83649de0928e066").unwrap(),
+			address: H160::from_str("ede84640d1a1d3e06902048e67aa7db8d52c2ce1").unwrap(),
+		};
+
+		let wallet: PresaleWallet = serde_json::from_str(json).unwrap();
+		assert_eq!(expected, wallet);
+	}
+}

ethstore/src/lib.rs

@@ -37,6 +37,7 @@ mod crypto;
 mod error;
 mod ethstore;
 mod import;
+mod presale;
 mod random;
 mod secret_store;
 
@@ -44,5 +45,6 @@ pub use self::account::SafeAccount;
 pub use self::error::Error;
 pub use self::ethstore::EthStore;
 pub use self::import::import_accounts;
+pub use self::presale::PresaleWallet;
 pub use self::secret_store::SecretStore;
 

ethstore/src/presale.rs

@@ -0,0 +1,80 @@
+use std::fs;
+use std::path::Path;
+use rcrypto::pbkdf2::pbkdf2;
+use rcrypto::sha2::Sha256;
+use rcrypto::hmac::Hmac;
+use json;
+use ethkey::{Address, Secret, KeyPair};
+use crypto::Keccak256;
+use {crypto, Error};
+
+pub struct PresaleWallet {
+	iv: [u8; 16],
+	ciphertext: [u8; 80],
+	address: Address,
+}
+
+impl From<json::PresaleWallet> for PresaleWallet {
+	fn from(wallet: json::PresaleWallet) -> Self {
+		let mut iv = [0u8; 16];
+		iv.copy_from_slice(&wallet.encseed[..16]);
+
+		let mut ciphertext = [0u8; 80];
+		ciphertext.copy_from_slice(&wallet.encseed[16..]);
+
+		PresaleWallet {
+			iv: iv,
+			ciphertext: ciphertext,
+			address: Address::from(wallet.address),
+		}
+	}
+}
+
+impl PresaleWallet {
+	pub fn open<P>(path: P) -> Result<Self, Error> where P: AsRef<Path> {
+		let file = try!(fs::File::open(path));
+		let presale = json::PresaleWallet::load(file).unwrap();
+		Ok(PresaleWallet::from(presale))
+	}
+
+	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 = [0u8; 64];
+		crypto::aes::decrypt_cbc(&derived_key, &self.iv, &self.ciphertext, &mut key);
+
+		let secret = Secret::from(key.keccak256());
+		if let Ok(kp) = KeyPair::from_secret(secret) {
+			if kp.address() == self.address {
+				return Ok(kp)
+			}
+		}
+
+		Err(Error::InvalidPassword)
+	}
+}
+
+#[cfg(test)]
+mod tests {
+	use ethkey::Address;
+	use super::PresaleWallet;
+	use json;
+
+	#[test]
+	fn test() {
+		let json = r#"
+		{
+			"encseed": "137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dedb3bc0a9ac6c79b9c426c5878ca2c9d06ff42a23cb648312fc32ba83649de0928e066",
+			"ethaddr": "ede84640d1a1d3e06902048e67aa7db8d52c2ce1",
+			"email": "123@gmail.com",
+			"btcaddr": "1JvqEc6WLhg6GnyrLBe2ztPAU28KRfuseH"
+		} "#;
+
+		let wallet = json::PresaleWallet::load(json.as_bytes()).unwrap();
+		let wallet = PresaleWallet::from(wallet);
+		let kp = wallet.decrypt("123").unwrap();
+		assert_eq!(kp.address(), Address::from(wallet.address));
+	}
+}