X-Git-Url: http://git.euphorik.ch/?p=crypto_lab1.git;a=blobdiff_plain;f=lab1_rust%2Fsrc%2Fmain.rs;h=2e15908baccd16f900399babf3bc1c14adaa61aa;hp=64aef28e128a89381fd18f561f08c422dd12ef8e;hb=d7f0bb987b21e93a5798403d294f7905151682f7;hpb=ecdec5bf7022018eadf4a38b01890bbb3ab79c89

diff --git a/lab1_rust/src/main.rs b/lab1_rust/src/main.rs
index 64aef28..2e15908 100644
--- a/lab1_rust/src/main.rs
+++ b/lab1_rust/src/main.rs
@@ -8,6 +8,7 @@ use std::os;
 
 use end_point::{ Client, Server };
 
+mod utils;
 mod crypto;
 mod packet;
 mod end_point;
@@ -15,9 +16,34 @@ mod oracle_machine;
 
 const PORT: u16 = 4221;
 
+fn do_oracle_attack(address: &str, variant: packet::Variant) {
+   // 16 bytes encrypted data from 'Packet::random_packet_data([4])'.
+   let cipher_block = [191, 192, 149, 84, 202, 163, 109, 230, 173, 249, 170, 248, 83, 60, 228, 111]; // Known by the attacker.
+   let xor_operand = [213, 29, 217, 187, 93, 103, 76, 129, 233, 142, 98, 83, 69, 50, 97, 91]; // This is the IV or the previous 16 bytes cipherblock. In our case we took the previous block.
+   let expected_plain_block = [242, 93, 12, 22, 8, 164, 4, 77, 200, 120, 189, 71, 75, 189, 2, 2]; // To be found by the attacker.
+
+   /* Another sample with an IV instead of a previous block.
+   let cipher_block: [u8, ..16] = [254, 9, 228, 149, 60, 42, 165, 34, 233, 75, 112, 57, 37, 9, 116, 103];
+   let xor_operand: [u8, ..16] = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3]; IV.
+   let expected_plain_block: [u8, ..16] = [44, 92, 31, 98, 220, 84, 226, 53, 58, 94, 45, 25, 242, 6, 199, 1];
+   */
+
+   match oracle_machine::decipher(address, PORT, &xor_operand, &cipher_block, variant) {
+      Some(ref deciphered) if deciphered.as_slice() == expected_plain_block => {
+         println!("The oracle machine has found the plain block!:");
+         println!("   Expected block: {}", expected_plain_block.to_vec());
+         println!("   Decrypted block: {}", deciphered)
+      }
+      Some(ref other) =>
+         println!("The oracle machine hasn't found the plain block: {}", other),
+      _ =>
+         println!("The oracle machine hasn't found the plain block"),
+   }
+}
+
 fn print_usage() {
    println!(
-      r"{} genkey | tests | oracle-weak | oracle-fixed
+      r"{} [genkey | tests | oracle-weak | oracle-fixed]
    genkey: Generate a 256 bits key
    tests: launch some tests between a client and a weak server
    oracle-weak: launch a padding oracle attack against a weak server
@@ -26,34 +52,68 @@ fn print_usage() {
    );
 }
 
-fn main() {
+enum Mode {
+   Help,
+   ServerAlone,
+   GenKey,
+   Tests,
+   OracleWeak,
+   OracleFixed,
+}
+
+fn mode() -> Mode {
    let args = os::args();
 
    if args.iter().any(|a| a.as_slice() == "--help" || a.as_slice() == "-h") {
-      print_usage();
-   } else if args.len() > 1 && args[1].as_slice() == "genkey" {
-      match crypto::generate_key(256 / 8) {
-         Ok(key) => println!("key: {}", key),
-         Err(e) => println!("Unable to generate a key. Error: {}", e)
-      }
+      return Mode::Help
+   }
+
+   if args.len() <= 1 {
+      Mode::ServerAlone
    } else {
-      println!("Starting server...");
+      match args[1].as_slice() {
+         "genkey" => Mode::GenKey,
+         "tests" => Mode::Tests,
+         "oracle-weak" => Mode::OracleWeak,
+         "oracle-fixed" => Mode::OracleFixed,
+         _ => Mode::ServerAlone,
+      }
+   }
+}
 
-      match Server::new("::1", PORT) {
-         Ok(mut server) => {
-            println!("Server started");
+fn main() {
+   let mode = mode();
+
+   match mode {
+      Mode::Help => print_usage(),
+      Mode::GenKey =>
+         match crypto::generate_key(256 / 8) {
+            Ok(key) => println!("key: {}", key),
+            Err(e) => println!("Unable to generate a key. Error: {}", e)
+         },
+      _ => {
+         let address = "::1";
+         println!("Starting server on [{}]:{}...", address, PORT);
 
-            if args.len() > 1 && args[1].as_slice() == "tests" {
-               Client::start_tests("::1", PORT);
-            }
+         match Server::new(address, PORT, match mode { Mode::OracleFixed => packet::Variant::Fixed, _ => packet::Variant::Weak }) {
+            Ok(mut server) => {
+               println!("Server started");
 
-            println!("Press any key to quit");
-            io::stdin().read_line().ok().expect("Failed to read line");
+               match mode {
+                  Mode::Tests => Client::start_tests(address, PORT, packet::Variant::Weak),
+                  Mode::OracleWeak => do_oracle_attack(address, packet::Variant::Weak),
+                  Mode::OracleFixed => do_oracle_attack(address, packet::Variant::Fixed),
+                  _ => {
+                     println!("Press any key to quit");
+                     io::stdin().read_line().ok().expect("Failed to read line");
+                  }
+               }
 
-            server.close().ok().expect("Failed to close the server");
-         },
-         Err(e) =>
-            println!("Unable to create a new server. Error: {}", e)
+               server.close().ok().expect("Failed to close the server");
+            },
+            Err(e) =>
+               println!("Unable to create a new server. Error: {}", e)
+         }
       }
    }
 }