added first test on real hardware

Cargo.toml

@@ -20,3 +20,4 @@ rand = "0.8.3"
 [dev-dependencies]
 hex-literal = "0.3.1"
 mockall = "0.10.2"
+pcsc = "2.6.0"

src/crypto/cipher_key.rs

@@ -7,9 +7,9 @@ use crate::error::Result;
 use simple_error::simple_error;
 
 #[derive(Debug, Clone)]
-struct CipherKey {
+pub struct CipherKey {
     /// Key as Array
-    key: Box<[u8]>,
+    pub key: Box<[u8]>, //TODO: Decide if this should be pub
 
     /// CipherType of Key
     cipher: CipherType,

src/desfire/desfire.rs

@@ -70,28 +70,34 @@ impl Desfire {
             Err(e) => { return Err(e); }
         }
 
-        let rnd_b_enc = response.body.unwrap().as_slice();
+        let rnd_b_response_body = response.body.unwrap();
+        let rnd_b_enc = rnd_b_response_body.as_slice();
+        println!("RND_B_ENC: {:x?}", rnd_b_enc);
 
-        let mut rnd_b = Tdes::decrypt(rnd_b_enc, key, vec![0 as u8; 8].as_slice()).unwrap();
+        let rnd_b = Tdes::decrypt(rnd_b_enc, key, vec![0 as u8; 8].as_slice()).unwrap();
+        println!("RND_B: {:x?}", rnd_b);
 
-        rnd_b.rotate_left(1);
+        let mut rnd_b_rl = rnd_b.clone();
-
+        rnd_b_rl.rotate_left(1);
-        let rnd_b_rl = rnd_b.as_slice();
+        println!("RND_B_RL: {:x?}", rnd_b_rl);
 
         let rnd_a = match rnd_a {
             None => { rand::random() }
             Some(i) => { i }
         };
+        println!("RND_A: {:x?}", rnd_a);
 
-        let rnd_ab = [&rnd_a, rnd_b_rl].concat();
+        let rnd_ab = [&rnd_a, rnd_b_rl.as_slice()].concat();
+        println!("RND_AB: {:x?}", rnd_ab);
 
         let rnd_ab_enc = Tdes::encrypt(rnd_ab.as_slice(), key, rnd_b_enc).unwrap();
+        println!("RND_AB_ENC: {:x?}", rnd_ab_enc);
 
         let cmd_challenge_response = APDUCommand {
             case: IsoCase::Case4Short,
             cla: 0x90,
             ins: APDUInstructions::CONTINUE as u8,
-            data: Some(rnd_ab_enc),
+            data: Some(rnd_ab_enc.clone()),
             ..Default::default()
         };
 
@@ -102,17 +108,24 @@ impl Desfire {
             Err(e) => { return Err(e); }
         }
 
-        let mut rnd_a_rot_from_card = Tdes::decrypt(response.body.unwrap().as_slice(), key, rnd_b.as_slice()).unwrap();
+        let iv: &[u8] = util::extract_last_block(rnd_ab_enc.as_slice(), 8).unwrap();
+        let rnd_a_enc_from_card = response.body.unwrap();
+        println!("RND_A_ENC_FROM_CARD: {:x?}", rnd_a_enc_from_card.as_slice());
+        let mut rnd_a_rot_from_card = Tdes::decrypt(rnd_a_enc_from_card.as_slice(), key, iv).unwrap();
+        println!("RND_A_ROT_FROM_CARD: {:x?}", rnd_a_rot_from_card);
         rnd_a_rot_from_card.rotate_right(1);
         let rnd_a_from_card = rnd_a_rot_from_card.as_slice();
+        println!("RND_A_FROM_CARD: {:x?}", rnd_a_from_card);
 
         if rnd_a != rnd_a_from_card {
             return Err(Error::InvalidPICCChallenge);
         }
 
         self.session_key = Some(generate_session_key_des(&rnd_a, rnd_b.as_slice()).unwrap());
+        println!("SESSION_KEY: {:x?}", self.session_key.as_ref().unwrap());
 
         self.cbc_iv = Some(vec![0 as u8; 8]);
+        println!("CBC_IV: {:x?}", self.cbc_iv.as_ref().unwrap());
         Ok(())
     }
 
@@ -122,12 +135,12 @@ impl Desfire {
     /// <param name="key_id">0x01 - 0x0D</param>
     /// <param name="key">Array of 8/16 Bytes</param>
     /// <param name="rndA">!!! WARNING For Testing only !!!</param>
-    pub fn authenticate_iso_aes(&mut self, key_id: u8, key: &[u8], rnd_a: Option<[u8; 8]>) -> Result<()> {
+    pub fn authenticate_iso_aes(&mut self, key_id: u8, key: &[u8], rnd_a: Option<[u8; 16]>) -> Result<()> {
         if key_id > 0x0E {
             return Err(InvalidKeyID);
         }
 
-        let auth_iv: Vec<u8>;
+        // let auth_iv: Vec<u8>;
 
         let cmd_challenge_request = APDUCommand {
             case: IsoCase::Case4Short,
@@ -144,30 +157,35 @@ impl Desfire {
             Err(e) => { return Err(e); }
         }
 
-        let rnd_b_enc = response.body.unwrap().as_slice();
+        let rnd_b_response_body = response.body.unwrap();
+        let rnd_b_enc = rnd_b_response_body.as_slice();
+        println!("RND_B_ENC: {:x?}", rnd_b_enc);
 
         let mut rnd_b = AES::decrypt(rnd_b_enc, key, vec![0 as u8; 16].as_slice()).unwrap();
+        println!("RND_B: {:x?}", rnd_b);
 
-        auth_iv = rnd_b.clone();
+        // auth_iv = rnd_b.clone();
-
+        let rnd_b_rl = rnd_b.clone();
         rnd_b.rotate_left(1);
-
+        println!("RND_B_RL: {:x?}", rnd_b_rl);
-        let rnd_b_rl = rnd_b.as_slice();
 
         let rnd_a = match rnd_a {
             None => { rand::random() }
             Some(i) => { i }
         };
+        println!("RND_A: {:x?}", rnd_a);
 
         let rnd_ab = [&rnd_a, rnd_b_rl].concat();
+        println!("RND_AB: {:x?}", rnd_ab);
 
         let rnd_ab_enc = AES::encrypt(rnd_ab.as_slice(), key, auth_iv.as_slice()).unwrap();
+        println!("RND_AB_ENC: {:x?}", rnd_ab_enc);
 
         let cmd_challenge_response = APDUCommand {
             case: IsoCase::Case4Short,
             cla: 0x90,
             ins: APDUInstructions::CONTINUE as u8,
-            data: Some(rnd_ab_enc),
+            data: Some(rnd_ab_enc.clone()),
             ..Default::default()
         };
 
@@ -515,23 +533,71 @@ fn generate_file_access_rights(read: u8, write: u8, read_write: u8, configure: u
 
 #[cfg(test)]
 mod tests {
+    use std::convert::TryFrom;
+    use std::ffi::{CStr, CString};
+    use std::fs::read;
+    use std::ops::Deref;
     use hex_literal::hex;
     use mockall::{mock, predicate};
-    use crate::{APDUResponse, APDUCommand, Card};
+    use pcsc::{Context, MAX_BUFFER_SIZE, Protocols, Scope, ShareMode, Card, Error, Disposition};
+    use crate::{APDUResponse, APDUCommand, Card as CardTrait};
     use crate::error::Result;
+    use crate::crypto::cipher_key::CipherKey;
+    use crate::crypto::cipher_type::CipherType;
     use crate::desfire::desfire::{generate_session_key_des, generate_session_key_aes, generate_keysetting1, generate_keysetting2, generate_file_access_rights, Desfire};
     use crate::desfire::{ChangeApplicationKey, ChangeMasterKeySettings, CreateDeleteFile, FileDirectoryAccess, ChangeMasterKey, CryptoOperationsType, FileIdentifiers};
-    use crate::error::Error::InvalidKeyID;
+    use crate::desfire::CryptoOperationsType::TDES;
+    use crate::error::Error::{InvalidKeyID, CardError};
+    use crate::iso7816_4::apdustatuswords::APDUStatusWord::OK;
 
     mock! {
         pub VirtualCard {}
-        impl Card for VirtualCard {
+        impl CardTrait for VirtualCard {
-            fn connect(&self);
+            fn connect(&mut self) -> Result<()>;
-            fn disconnect(&self);
+            fn disconnect(&mut self) -> Result<()>;
             fn transmit(&self, apdu_cmd: APDUCommand) -> Result<APDUResponse>;
         }
     }
 
+    pub struct PCSCCard {
+        ctx: Context,
+        reader: CString,
+        card: Option<Card>,
+    }
+
+    impl CardTrait for PCSCCard {
+        fn connect(&mut self) -> Result<()> {
+            self.card = match self.ctx.connect(&self.reader, ShareMode::Shared, Protocols::ANY) {
+                Ok(card) => Some(card),
+                Err(err) => {
+                    eprintln!("Failed to connect to card: {}", err);
+                    return Err(CardError)
+                }
+            };
+
+            return Ok(())
+        }
+
+        fn disconnect(&mut self) -> Result<()> {
+            Ok(())
+        }
+
+        fn transmit(&self, apdu_cmd: APDUCommand) -> Result<APDUResponse> {
+            println!("{}", apdu_cmd);
+            let apdu = Vec::<u8>::try_from(apdu_cmd).unwrap();
+            let mut rapdu_buf = [0; MAX_BUFFER_SIZE];
+            let rapdu = match self.card.as_ref().unwrap().transmit(apdu.as_slice(), &mut rapdu_buf) {
+                Ok(rapdu) => rapdu,
+                Err(err) => {
+                    eprintln!("Failed to transmit APDU command to card: {}", err);
+                    return Err(CardError)
+                }
+            };
+            println!("APDU response: {:x?}", rapdu);
+            return Ok(APDUResponse::new(rapdu))
+        }
+    }
+
     #[test]
     fn generate_sessionkey_des() {
         let rndA = hex!("a541a9dc9138df07");
@@ -619,7 +685,7 @@ mod tests {
     #[test]
     fn select_application() {
         let mut mock = MockVirtualCard::new();
-        mock.expect_transmit().withf(|x: APDUCommand| (x as Vec<u8>) == vec![0x90, 0x5a, 0x00, 0x00, 0x03, 0x33, 0x22, 0x11, 0x00]).return_const(Ok(APDUResponse{
+        mock.expect_transmit().withf(|x: &APDUCommand| (Vec::<u8>::try_from(x.clone()).unwrap()) == vec![0x90, 0x5a, 0x00, 0x00, 0x03, 0x33, 0x22, 0x11, 0x00]).return_once(move |_| Ok(APDUResponse{
             body: None,
             sw1: 0x91,
             sw2: 0x00
@@ -632,7 +698,180 @@ mod tests {
         };
 
         assert!(desfire.select_application(0x112233).is_ok())
+    }
 
+    #[test]
+    #[ignore]
+    fn select_application_hardware() {
+        // Establish a PC/SC context.
+        let ctx = match Context::establish(Scope::User) {
+            Ok(ctx) => ctx,
+            Err(err) => {
+                eprintln!("Failed to establish context: {}", err);
+                std::process::exit(1);
+            }
+        };
+
+        // List available readers.
+        let mut readers_buf = [0; 2048];
+        let mut readers = match ctx.list_readers(&mut readers_buf) {
+            Ok(readers) => readers,
+            Err(err) => {
+                eprintln!("Failed to list readers: {}", err);
+                std::process::exit(1);
+            }
+        };
+
+        // Use the first reader.
+        let reader = match readers.next() {
+            Some(reader) => reader,
+            None => {
+                println!("No readers are connected.");
+                return;
+            }
+        };
+        
+        let mut card = PCSCCard {
+            ctx,
+            reader: CString::from(reader),
+            card: None
+        };
+
+        card.connect();
+
+        let desfire = Desfire{
+            card: Box::new(card),
+            cbc_iv: None,
+            session_key: None
+        };
+
+        assert!(desfire.select_application(0x000000).is_ok());
+    }
+
+    #[test]
+    fn authenticate_des() {
+        let mut mock = MockVirtualCard::new();
+        mock.expect_transmit().withf(|x: &APDUCommand| (Vec::<u8>::try_from(x.clone()).unwrap()) == vec![0x90, 0x1a, 0x00, 0x00, 0x01, 0x00, 0x00]).return_once(move |_| Ok(APDUResponse{
+            sw1: 0x91,
+            sw2: 0xAF,
+            body: Some(vec![0x2b, 0xf9, 0xa9, 0x38, 0xec, 0xca, 0x02, 0xe2])
+        }));
+
+        mock.expect_transmit().withf(|x: &APDUCommand| (Vec::<u8>::try_from(x.clone()).unwrap()) == hex!("90af000010f8cdb2eaa42a3167dfcb53852ce267fd00")).return_once(move |_| Ok(APDUResponse{
+            sw1: 0x91,
+            sw2: 0x00,
+            body: Some(vec![0x07, 0xd8, 0x25, 0x60, 0x7a, 0x55, 0x2e, 0x2e])
+        }));
+
+        let rndA = hex!("5f7d1dd12d979173");
+        let mut key = CipherKey::new_empty(CipherType::TDES).unwrap();
+        println!("{:x?}", key.key.deref());
+
+        let mut desfire = Desfire{
+            card: Box::new(mock),
+            cbc_iv: None,
+            session_key: None
+        };
+
+        desfire.authenticate_iso_des(0x00, key.key.as_ref(), Some(rndA)).unwrap();
+
+        let sessionkey_expected = hex!("5f7d1dd1f449db5c5f7d1dd1f449db5c");
+        let iv_expected = hex!("0000000000000000");
+
+        assert_eq!(desfire.session_key.unwrap(), sessionkey_expected);
+        assert_eq!(desfire.cbc_iv.unwrap(), iv_expected);
+
+    }
+
+    #[test]
+    #[ignore]
+    fn authenticate_des_hardware() {
+        // Establish a PC/SC context.
+        let ctx = match Context::establish(Scope::User) {
+            Ok(ctx) => ctx,
+            Err(err) => {
+                eprintln!("Failed to establish context: {}", err);
+                std::process::exit(1);
+            }
+        };
+
+        // List available readers.
+        let mut readers_buf = [0; 2048];
+        let mut readers = match ctx.list_readers(&mut readers_buf) {
+            Ok(readers) => readers,
+            Err(err) => {
+                eprintln!("Failed to list readers: {}", err);
+                std::process::exit(1);
+            }
+        };
+
+        // Use the first reader.
+        let reader = match readers.next() {
+            Some(reader) => reader,
+            None => {
+                println!("No readers are connected.");
+                return;
+            }
+        };
+
+        let mut card = PCSCCard {
+            ctx,
+            reader: CString::from(reader),
+            card: None
+        };
+
+        card.connect();
+
+        let mut desfire = Desfire{
+            card: Box::new(card),
+            cbc_iv: None,
+            session_key: None
+        };
+
+        desfire.select_application(0x000000);
+
+        let mut key = CipherKey::new_empty(CipherType::TDES).unwrap();
+        match desfire.authenticate_iso_des(0x00, key.key.as_ref(), None) {
+            Ok(_) => {},
+            Err(err) => {
+                eprintln!("Failed to authenticate: {}", err);
+                panic!("Failed to authenticate");
+            }
+        }
+    }
+
+    #[test]
+    fn authenticate_aes() {
+        let mut mock = MockVirtualCard::new();
+        mock.expect_transmit().withf(|x: &APDUCommand| (Vec::<u8>::try_from(x.clone()).unwrap()) == hex!("90aa0000010000")).return_once(move |_| Ok(APDUResponse{
+            sw1: 0x91,
+            sw2: 0xAF,
+            body: Some(hex!("a33856932308775cf464610c2b17a558").to_vec())
+        }));
+
+        mock.expect_transmit().withf(|x: &APDUCommand| (Vec::<u8>::try_from(x.clone()).unwrap()) == hex!("90af000020cbe9726faf54bc76b2055d0b9700e7dc97ecad5627f1d1702a16e8408d2a0ada00")).return_once(move |_| Ok(APDUResponse{
+            sw1: 0x91,
+            sw2: 0x00,
+            body: Some(hex!("8fdc476f6bac44fe9150e285abd68d48").to_vec())
+        }));
+
+        let rndA = hex!("2176770e7a6eb4bef00d5e4b201d1e57");
+        let mut key = CipherKey::new_empty(CipherType::AES).unwrap();
+        println!("{:x?}", key.key.deref());
+
+        let mut desfire = Desfire{
+            card: Box::new(mock),
+            cbc_iv: None,
+            session_key: None
+        };
+
+        desfire.authenticate_iso_aes(0x00, key.key.as_ref(), Some(rndA)).unwrap();
+
+        let sessionkey_expected = hex!("5f7d1dd1f449db5c5f7d1dd1f449db5c");
+        let iv_expected = hex!("0000000000000000");
+
+        assert_eq!(desfire.session_key.unwrap(), sessionkey_expected);
+        assert_eq!(desfire.cbc_iv.unwrap(), iv_expected);
 
     }
 }

src/error.rs

@@ -24,12 +24,14 @@ pub enum Error {
     DuplicateError,
     FileNotFound,
     InvalidApplicationID,
+    ApplicationNotFound,
     InvalidAPDUResponse,
     InvalidIsoCase,
     InvalidKeyID,
     InvalidPICCChallenge,
     InvalidFileID,
     NumKeys,
+    CardError,
 }
 
 impl fmt::Display for Error {
@@ -116,6 +118,12 @@ impl fmt::Display for Error {
             Error::NumKeys => {
                 write!(f, "Number of Keys was larger then 0x0D")
             }
+            Error::CardError => {
+                write!(f, "An error occurred during communication with the card.")
+            }
+            Error::ApplicationNotFound => {
+                write!(f, "The application was not found on the card.")
+            }
         }
     }
 }

src/iso7816_4/apducommand.rs

@@ -4,7 +4,7 @@ use std::convert::TryFrom;
 use crate::error::{Result, Error};
 
 #[repr(u8)]
-#[derive(Eq, PartialEq, Hash, Debug)]
+#[derive(Eq, PartialEq, Hash, Debug, Clone)]
 pub enum IsoCase {
     /// <summary>No command data. No response data.</summary>
         /// <remarks>
@@ -82,7 +82,7 @@ impl Default for IsoCase {
 }
 
 #[repr(u8)]
-#[derive(Eq, PartialEq, Hash, Debug)]
+#[derive(Eq, PartialEq, Hash, Debug, Clone)]
 pub enum SCardProtocol {
     /// <summary>
     /// protocol not defined.
@@ -106,10 +106,10 @@ pub enum SCardProtocol {
 }
 
 impl Default for SCardProtocol {
-    fn default() -> Self { SCardProtocol::Unset }
+    fn default() -> Self { SCardProtocol::Any }
 }
 
-#[derive(Eq, PartialEq, Hash, Debug, Default)]
+#[derive(Eq, PartialEq, Hash, Debug, Default, Clone)]
 pub struct APDUCommand {
     pub case: IsoCase,
     pub protocol: SCardProtocol,
@@ -118,8 +118,7 @@ pub struct APDUCommand {
     pub p1: u8,
     pub p2: u8,
     pub data: Option<Vec<u8>>,
-    pub lc: i32,
+    pub le: usize,
-    pub le: i32,
 }
 
 impl TryFrom<APDUCommand> for Vec<u8> {
@@ -144,11 +143,11 @@ impl TryFrom<APDUCommand> for Vec<u8> {
                 v.push(cmd.le as u8);
             }
             IsoCase::Case3Short => {
-                v.push(cmd.lc as u8);
+                v.push(cmd.lc() as u8);
                 v.extend(cmd.data.unwrap());
             }
             IsoCase::Case4Short => {
-                v.push(cmd.lc as u8);
+                v.push(cmd.data.as_ref().unwrap().len() as u8);
                 v.extend(cmd.data.unwrap());
                 if cmd.protocol == SCardProtocol::T0 {
                     v.push(0x00);
@@ -157,6 +156,7 @@ impl TryFrom<APDUCommand> for Vec<u8> {
                 }
             }
             _ => {
+                
                 return Err(Error::InvalidIsoCase)
             }
         }
@@ -166,11 +166,15 @@ impl TryFrom<APDUCommand> for Vec<u8> {
 //FIXME: Do we want pub fields or constructor?
 // We want pub fields! + constructor?
 
-// impl APDUCommand {
+impl APDUCommand {
     // pub fn new(case: IsoCase) -> Self {
     //     APDUCommand { case, protocol: (), cla: (), ins: (), p1: (), p2: (), data: (), lc: (), le: () }
     // }
-// }
+
+    pub fn lc(&self) -> usize {
+        self.data.as_ref().unwrap().len()
+    }
+}
 
 impl fmt::Display for APDUCommand {
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
@@ -182,14 +186,14 @@ impl fmt::Display for APDUCommand {
                 write!(f, "(CASE: 2) cla: {:#X} | ins: {:#X} | p1: {:#X} | p2: {:#X} | LE: {:#X}", self.cla, self.ins, self.p1, self.p2, self.le)
             }
             IsoCase::Case3Short | IsoCase::Case3Extended => {
-                write!(f, "(CASE: 3) cla: {:#X} | ins: {:#X} | p1: {:#X} | p2: {:#X} | LC: {:#X} | data: [ ", self.cla, self.ins, self.p1, self.p2, self.lc)?;
+                write!(f, "(CASE: 3) cla: {:#X} | ins: {:#X} | p1: {:#X} | p2: {:#X} | LC: {:#X} | data: [ ", self.cla, self.ins, self.p1, self.p2, self.lc())?;
                 for b in self.data.as_ref().unwrap() {
                     write!(f, "{:#X} ", b)?;
                 }
                 write!(f, "]")
             }
             IsoCase::Case4Short | IsoCase::Case4Extended => {
-                write!(f, "(CASE: 4) cla: {:#X} | ins: {:#X} | p1: {:#X} | p2: {:#X} | LC: {:#X} | data: [ ", self.cla, self.ins, self.p1, self.p2, self.lc)?;
+                write!(f, "(CASE: 4) cla: {:#X} | ins: {:#X} | p1: {:#X} | p2: {:#X} | LC: {:#X} | data: [ ", self.cla, self.ins, self.p1, self.p2, self.lc())?;
                 for b in self.data.as_ref().unwrap() {
                     write!(f, "{:#X} ", b)?;
                 }
@@ -286,7 +290,7 @@ mod tests {
         };
 
         println!("{}", command1.to_string());
-        assert_eq!("(CASE: 3) cla: 0x90 | ins: 0x1A | p1: 0x0 | p2: 0x0 | LC: 0x0 | data: [ 0x1 0x2 0x3 ]", command1.to_string());
+        assert_eq!("(CASE: 3) cla: 0x90 | ins: 0x1A | p1: 0x0 | p2: 0x0 | LC: 0x3 | data: [ 0x1 0x2 0x3 ]", command1.to_string());
     }
 
     #[test]
@@ -300,6 +304,6 @@ mod tests {
         };
 
         println!("{}", command1.to_string());
-        assert_eq!("(CASE: 4) cla: 0x90 | ins: 0x1A | p1: 0x0 | p2: 0x0 | LC: 0x0 | data: [ 0x1 0x2 0x3 ] | LE: 0x0", command1.to_string());
+        assert_eq!("(CASE: 4) cla: 0x90 | ins: 0x1A | p1: 0x0 | p2: 0x0 | LC: 0x3 | data: [ 0x1 0x2 0x3 ] | LE: 0x0", command1.to_string());
     }
 }

src/iso7816_4/apduresponse.rs

@@ -1,7 +1,7 @@
 use crate::iso7816_4::apdustatuswords::{APDUStatusWord, APDUStatusWord2};
 use crate::error::{Result};
 use num_traits::FromPrimitive;
-use crate::error::Error::{InvalidStatusWord, IllegalCommandCode, IntegrityError, NoSuchKey, LengthError, PermissionDenied, ParameterError, AuthenticationDelay, AuthenticationError, BoundaryError, CommandAborted, DuplicateError, FileNotFound};
+use crate::error::Error::{InvalidStatusWord, IllegalCommandCode, IntegrityError, NoSuchKey, LengthError, PermissionDenied, ParameterError, AuthenticationDelay, AuthenticationError, BoundaryError, CommandAborted, DuplicateError, FileNotFound, ApplicationNotFound};
 use std::fmt;
 
 #[derive(Eq, PartialEq, Hash, Debug, Default)]
@@ -32,7 +32,7 @@ impl From<APDUResponse> for Vec<u8> {
 
 impl fmt::Display for APDUResponse {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match self.body {
+        match &self.body {
             None => {
                 write!(f, "SW1: {:#X} | SW2: 0x{:#X}", self.sw1, self.sw2)
             },
@@ -42,13 +42,22 @@ impl fmt::Display for APDUResponse {
         }
     }
 }
-
 impl APDUResponse {
     pub fn new(raw: &[u8]) -> Self {
+        if raw.len() < 2 {
+            panic!("APDU response must be at least 2 bytes long");
+        } else if raw.len() == 2 {
             APDUResponse {
-            body: Some(raw[..raw.len() - 1].to_vec()),
+                body: None,
+                sw1: raw[0],
+                sw2: raw[1],
+            }
+        } else {
+            APDUResponse {
+                body: Some(raw[..raw.len() - 2].to_vec()),
                 sw1: raw[raw.len() - 2],
-            sw2: raw[raw.len() - 3]
+                sw2: raw[raw.len() - 1],
+            }
         }
     }
 
@@ -96,6 +105,7 @@ impl APDUResponse {
                 Some(APDUStatusWord2::CommandAborted) => {Err(CommandAborted)}
                 Some(APDUStatusWord2::DuplicateError) => {Err(DuplicateError)}
                 Some(APDUStatusWord2::FileNotFound) => {Err(FileNotFound)}
+                Some(APDUStatusWord2::ApplicationNotFound) => {Err(ApplicationNotFound)}
                 None => { Err(InvalidStatusWord)}
             }
         } else { Err(InvalidStatusWord) }

src/iso7816_4/apdustatuswords.rs

@@ -150,4 +150,5 @@ pub enum APDUStatusWord2 {
     CommandAborted = 0xCA,
     DuplicateError = 0xDE,
     FileNotFound = 0xF0,
+    ApplicationNotFound = 0xA0,
 }

src/lib.rs

@@ -11,12 +11,12 @@ pub trait  Card {
 /// <summary>
 /// Connect to Smartcard
 /// </summary>
-fn connect(&self);
+fn connect(&mut self) -> Result<()>;
 
 /// <summary>
 /// Disconnect from Smartcard
 /// </summary>
-fn disconnect(&self);
+fn disconnect(&mut self) -> Result<()>;
 
 /// <summary>
 /// Transmit APDU Command to Smartcard