Merge pull request #42 from carl-wallace/develop

Change CHUID struct to hold complete CHUID value. Add getters for sub components. Add additional consts to support this. Modified CCCID struct to be public (as prelude to similar treatment).

src/cccid.rs

@@ -50,7 +50,7 @@ const CCC_TMPL: &[u8] = &[
 
 /// Cardholder Capability Container (CCC) Identifier
 #[derive(Copy, Clone, Debug, Eq, PartialEq)]
-pub struct CCCID([u8; YKPIV_CCCID_SIZE]);
+pub struct CCCID(pub [u8; YKPIV_CCCID_SIZE]);
 
 impl CCCID {
     /// Generate a random CCCID

src/chuid.rs

@@ -55,20 +55,47 @@ const CHUID_TMPL: &[u8] = &[
     0x30, 0x33, 0x30, 0x30, 0x31, 0x30, 0x31, 0x3e, 0x00, 0xfe, 0x00,
 ];
 
-/// Cardholder Unique Identifier (CHUID)
+/// Cardholder Unique Identifier (CHUID) Card UUID/GUID value
 #[derive(Copy, Clone, Debug)]
-pub struct CHUID(pub [u8; YKPIV_CARDID_SIZE]);
+pub struct ChuidUuid(pub [u8; YKPIV_CARDID_SIZE]);
+
+/// Cardholder Unique Identifier (CHUID)
+#[derive(Copy, Clone)]
+pub struct CHUID(pub [u8; YKPIV_CHUID_SIZE]);
 
 impl CHUID {
+    /// Return FASC-N component of CHUID
+    pub fn fascn(&self) -> Result<[u8; YKPIV_FASCN_SIZE], Error> {
+        let mut fascn = [0u8; YKPIV_FASCN_SIZE];
+        fascn.copy_from_slice(&self.0[CHUID_FASCN_OFFS..(CHUID_FASCN_OFFS + YKPIV_FASCN_SIZE)]);
+        Ok(fascn)
+    }
+
+    /// Return Card UUID/GUID component of CHUID
+    pub fn uuid(&self) -> Result<[u8; YKPIV_CARDID_SIZE], Error> {
+        let mut uuid = [0u8; YKPIV_CARDID_SIZE];
+        uuid.copy_from_slice(&self.0[CHUID_GUID_OFFS..(CHUID_GUID_OFFS + YKPIV_CARDID_SIZE)]);
+        Ok(uuid)
+    }
+
+    /// Return expiration date component of CHUID
+    pub fn expiration(&self) -> Result<[u8; YKPIV_EXPIRATION_SIZE], Error> {
+        let mut expiration = [0u8; YKPIV_EXPIRATION_SIZE];
+        expiration.copy_from_slice(
+            &self.0[CHUID_EXPIRATION_OFFS..(CHUID_EXPIRATION_OFFS + YKPIV_EXPIRATION_SIZE)],
+        );
+        Ok(expiration)
+    }
+
     /// Generate a random Cardholder Unique Identifier (CHUID)
-    pub fn generate() -> Result<Self, Error> {
+    pub fn generate() -> Result<ChuidUuid, Error> {
         let mut id = [0u8; YKPIV_CARDID_SIZE];
         getrandom(&mut id).map_err(|_| Error::RandomnessError)?;
-        Ok(CHUID(id))
+        Ok(ChuidUuid(id))
     }
 
     /// Get Cardholder Unique Identifier (CHUID)
-    pub fn get(yubikey: &mut YubiKey) -> Result<Self, Error> {
+    pub fn get(yubikey: &mut YubiKey) -> Result<CHUID, Error> {
         let txn = yubikey.begin_transaction()?;
         let response = txn.fetch_object(YKPIV_OBJ_CHUID)?;
 
@@ -76,15 +103,16 @@ impl CHUID {
             return Err(Error::GenericError);
         }
 
-        let mut cardid = [0u8; YKPIV_CARDID_SIZE];
-        cardid.copy_from_slice(&response[CHUID_GUID_OFFS..(CHUID_GUID_OFFS + YKPIV_CARDID_SIZE)]);
-        Ok(CHUID(cardid))
+        let mut chuid = [0u8; YKPIV_CHUID_SIZE];
+        chuid.copy_from_slice(&response[0..YKPIV_CHUID_SIZE]);
+        let retval = CHUID { 0: chuid };
+        Ok(retval)
     }
 
     /// Set Cardholder Unique Identifier (CHUID)
     pub fn set(&self, yubikey: &mut YubiKey) -> Result<(), Error> {
         let mut buf = CHUID_TMPL.to_vec();
-        buf[CHUID_GUID_OFFS..(CHUID_GUID_OFFS + self.0.len())].copy_from_slice(&self.0);
+        buf[0..self.0.len()].copy_from_slice(&self.0);
 
         let txn = yubikey.begin_transaction()?;
         txn.save_object(YKPIV_OBJ_CHUID, &buf)

src/consts.rs

@@ -63,7 +63,9 @@ pub const CB_PIN_MAX: usize = 8;
 
 pub const CCC_ID_OFFS: usize = 9;
 
+pub const CHUID_FASCN_OFFS: usize = 2;
 pub const CHUID_GUID_OFFS: usize = 29;
+pub const CHUID_EXPIRATION_OFFS: usize = 47;
 
 pub const CHREF_ACT_CHANGE_PIN: i32 = 0;
 pub const CHREF_ACT_UNBLOCK_PIN: i32 = 1;
@@ -129,7 +131,10 @@ pub const YKPIV_ALGO_ECCP384: u8 = 0x14;
 
 pub const YKPIV_ATR_NEO_R3: &[u8] = b";\xFC\x13\0\0\x811\xFE\x15YubikeyNEOr3\xE1\0";
 
+pub const YKPIV_CHUID_SIZE: usize = 59;
 pub const YKPIV_CARDID_SIZE: usize = 16;
+pub const YKPIV_FASCN_SIZE: usize = 25;
+pub const YKPIV_EXPIRATION_SIZE: usize = 8;
 
 pub const YKPIV_CCCID_SIZE: usize = 14;