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Merge branch 'master' into v2_lib

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This commit is contained in:
kaczmarczyck
2020-12-04 15:26:03 +01:00
committed by GitHub
parent 16c0196b1d f475aa5d28
commit c5007e384e
7 changed files with 572 additions and 27 deletions
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431
src/ctap/apdu.rs Normal file
View File

@@ -0,0 +1,431 @@
use alloc::vec::Vec;
use byteorder::{BigEndian, ByteOrder};
use core::convert::TryFrom;
type ByteArray = &'static [u8];
const APDU_HEADER_LEN: usize = 4;
#[cfg_attr(test, derive(Clone, Debug))]
#[allow(non_camel_case_types)]
#[derive(PartialEq)]
pub enum ApduStatusCode {
SW_SUCCESS,
/// Command successfully executed; 'XX' bytes of data are
/// available and can be requested using GET RESPONSE.
SW_GET_RESPONSE,
SW_WRONG_DATA,
SW_WRONG_LENGTH,
SW_COND_USE_NOT_SATISFIED,
SW_FILE_NOT_FOUND,
SW_INCORRECT_P1P2,
/// Instruction code not supported or invalid
SW_INS_INVALID,
SW_CLA_INVALID,
SW_INTERNAL_EXCEPTION,
}
impl From<ApduStatusCode> for ByteArray {
fn from(status_code: ApduStatusCode) -> ByteArray {
match status_code {
ApduStatusCode::SW_SUCCESS => b"\x90\x00",
ApduStatusCode::SW_GET_RESPONSE => b"\x61\x00",
ApduStatusCode::SW_WRONG_DATA => b"\x6A\x80",
ApduStatusCode::SW_WRONG_LENGTH => b"\x67\x00",
ApduStatusCode::SW_COND_USE_NOT_SATISFIED => b"\x69\x85",
ApduStatusCode::SW_FILE_NOT_FOUND => b"\x6a\x82",
ApduStatusCode::SW_INCORRECT_P1P2 => b"\x6a\x86",
ApduStatusCode::SW_INS_INVALID => b"\x6d\x00",
ApduStatusCode::SW_CLA_INVALID => b"\x6e\x00",
ApduStatusCode::SW_INTERNAL_EXCEPTION => b"\x6f\x00",
}
}
}
#[allow(dead_code)]
pub enum ApduInstructions {
Select = 0xA4,
ReadBinary = 0xB0,
GetResponse = 0xC0,
}
#[cfg_attr(test, derive(Clone, Debug))]
#[allow(dead_code)]
#[derive(Default, PartialEq)]
pub struct ApduHeader {
cla: u8,
ins: u8,
p1: u8,
p2: u8,
}
impl From<&[u8; APDU_HEADER_LEN]> for ApduHeader {
fn from(header: &[u8; APDU_HEADER_LEN]) -> Self {
ApduHeader {
cla: header[0],
ins: header[1],
p1: header[2],
p2: header[3],
}
}
}
#[cfg_attr(test, derive(Clone, Debug))]
#[derive(PartialEq)]
/// The APDU cases
pub enum Case {
Le1,
Lc1Data,
Lc1DataLe1,
Lc3Data,
Lc3DataLe1,
Lc3DataLe2,
Le3,
}
#[cfg_attr(test, derive(Clone, Debug))]
#[allow(dead_code)]
#[derive(PartialEq)]
pub enum ApduType {
Instruction,
Short(Case),
Extended(Case),
}
#[cfg_attr(test, derive(Clone, Debug))]
#[allow(dead_code)]
#[derive(PartialEq)]
pub struct APDU {
header: ApduHeader,
lc: u16,
data: Vec<u8>,
le: u32,
case_type: ApduType,
}
impl TryFrom<&[u8]> for APDU {
type Error = ApduStatusCode;
fn try_from(frame: &[u8]) -> Result<Self, ApduStatusCode> {
if frame.len() < APDU_HEADER_LEN as usize {
return Err(ApduStatusCode::SW_WRONG_DATA);
}
// +-----+-----+----+----+
// header | CLA | INS | P1 | P2 |
// +-----+-----+----+----+
let (header, payload) = frame.split_at(APDU_HEADER_LEN);
if payload.is_empty() {
// Lc is zero-bytes in length
return Ok(APDU {
header: array_ref!(header, 0, APDU_HEADER_LEN).into(),
lc: 0x00,
data: Vec::new(),
le: 0x00,
case_type: ApduType::Instruction,
});
}
// Lc is not zero-bytes in length, let's figure out how long it is
let byte_0 = payload[0];
if payload.len() == 1 {
// There is only one byte in the payload, that byte cannot be Lc because that would
// entail at *least* one another byte in the payload (for the command data)
return Ok(APDU {
header: array_ref!(header, 0, APDU_HEADER_LEN).into(),
lc: 0x00,
data: Vec::new(),
le: if byte_0 == 0x00 {
// Ne = 256
0x100
} else {
byte_0.into()
},
case_type: ApduType::Short(Case::Le1),
});
}
if payload.len() == 1 + (byte_0 as usize) && byte_0 != 0 {
// Lc is one-byte long and since the size specified by Lc covers the rest of the
// payload there's no Le at the end
return Ok(APDU {
header: array_ref!(header, 0, APDU_HEADER_LEN).into(),
lc: byte_0.into(),
data: payload[1..].to_vec(),
case_type: ApduType::Short(Case::Lc1Data),
le: 0,
});
}
if payload.len() == 2 + (byte_0 as usize) && byte_0 != 0 {
// Lc is one-byte long and since the size specified by Lc covers the rest of the
// payload with ONE additional byte that byte must be Le
let last_byte: u32 = (*payload.last().unwrap()).into();
return Ok(APDU {
header: array_ref!(header, 0, APDU_HEADER_LEN).into(),
lc: byte_0.into(),
data: payload[1..(payload.len() - 1)].to_vec(),
le: if last_byte == 0x00 { 0x100 } else { last_byte },
case_type: ApduType::Short(Case::Lc1DataLe1),
});
}
if payload.len() > 2 {
// Lc is possibly three-bytes long
let extended_apdu_lc: usize = BigEndian::read_u16(&payload[1..]) as usize;
let extended_apdu_le_len: usize = if payload.len() > extended_apdu_lc {
payload.len() - extended_apdu_lc - 3
} else {
0
};
if byte_0 == 0 && extended_apdu_le_len <= 3 {
// If first byte is zero AND the next two bytes can be parsed as a big-endian
// length that covers the rest of the block (plus few additional bytes for Le), we
// have an extended-length APDU
let last_byte: u32 = (*payload.last().unwrap()).into();
return Ok(APDU {
header: array_ref!(header, 0, APDU_HEADER_LEN).into(),
lc: extended_apdu_lc as u16,
data: payload[3..(payload.len() - extended_apdu_le_len)].to_vec(),
le: match extended_apdu_le_len {
0 => 0,
1 => {
if last_byte == 0x00 {
0x100
} else {
last_byte
}
}
2 => {
let le_parsed = BigEndian::read_u16(&payload[payload.len() - 2..]);
if le_parsed == 0x00 {
0x10000
} else {
le_parsed as u32
}
}
3 => {
let le_first_byte: u32 =
(*payload.get(payload.len() - 3).unwrap()).into();
if le_first_byte != 0x00 {
return Err(ApduStatusCode::SW_INTERNAL_EXCEPTION);
}
let le_parsed = BigEndian::read_u16(&payload[payload.len() - 2..]);
if le_parsed == 0x00 {
0x10000
} else {
le_parsed as u32
}
}
_ => return Err(ApduStatusCode::SW_INTERNAL_EXCEPTION),
},
case_type: ApduType::Extended(match extended_apdu_le_len {
0 => Case::Lc3Data,
1 => Case::Lc3DataLe1,
2 => Case::Lc3DataLe2,
3 => Case::Le3,
_ => return Err(ApduStatusCode::SW_INTERNAL_EXCEPTION),
}),
});
}
}
Err(ApduStatusCode::SW_INTERNAL_EXCEPTION)
}
}
#[cfg(test)]
mod test {
use super::*;
fn pass_frame(frame: &[u8]) -> Result<APDU, ApduStatusCode> {
APDU::try_from(frame)
}
#[test]
fn test_case_type_1() {
let frame: [u8; 4] = [0x00, 0x12, 0x00, 0x80];
let response = pass_frame(&frame);
assert!(response.is_ok());
let expected = APDU {
header: ApduHeader {
cla: 0x00,
ins: 0x12,
p1: 0x00,
p2: 0x80,
},
lc: 0x00,
data: Vec::new(),
le: 0x00,
case_type: ApduType::Instruction,
};
assert_eq!(Ok(expected), response);
}
#[test]
fn test_case_type_2_short() {
let frame: [u8; 5] = [0x00, 0xb0, 0x00, 0x00, 0x0f];
let response = pass_frame(&frame);
let expected = APDU {
header: ApduHeader {
cla: 0x00,
ins: 0xb0,
p1: 0x00,
p2: 0x00,
},
lc: 0x00,
data: Vec::new(),
le: 0x0f,
case_type: ApduType::Short(Case::Le1),
};
assert_eq!(Ok(expected), response);
}
#[test]
fn test_case_type_2_short_le() {
let frame: [u8; 5] = [0x00, 0xb0, 0x00, 0x00, 0x00];
let response = pass_frame(&frame);
let expected = APDU {
header: ApduHeader {
cla: 0x00,
ins: 0xb0,
p1: 0x00,
p2: 0x00,
},
lc: 0x00,
data: Vec::new(),
le: 0x100,
case_type: ApduType::Short(Case::Le1),
};
assert_eq!(Ok(expected), response);
}
#[test]
fn test_case_type_3_short() {
let frame: [u8; 7] = [0x00, 0xa4, 0x00, 0x0c, 0x02, 0xe1, 0x04];
let payload = [0xe1, 0x04];
let response = pass_frame(&frame);
let expected = APDU {
header: ApduHeader {
cla: 0x00,
ins: 0xa4,
p1: 0x00,
p2: 0x0c,
},
lc: 0x02,
data: payload.to_vec(),
le: 0x00,
case_type: ApduType::Short(Case::Lc1Data),
};
assert_eq!(Ok(expected), response);
}
#[test]
fn test_case_type_4_short() {
let frame: [u8; 13] = [
0x00, 0xa4, 0x04, 0x00, 0x07, 0xd2, 0x76, 0x00, 0x00, 0x85, 0x01, 0x01, 0xff,
];
let payload = [0xd2, 0x76, 0x00, 0x00, 0x85, 0x01, 0x01];
let response = pass_frame(&frame);
let expected = APDU {
header: ApduHeader {
cla: 0x00,
ins: 0xa4,
p1: 0x04,
p2: 0x00,
},
lc: 0x07,
data: payload.to_vec(),
le: 0xff,
case_type: ApduType::Short(Case::Lc1DataLe1),
};
assert_eq!(Ok(expected), response);
}
#[test]
fn test_case_type_4_short_le() {
let frame: [u8; 13] = [
0x00, 0xa4, 0x04, 0x00, 0x07, 0xd2, 0x76, 0x00, 0x00, 0x85, 0x01, 0x01, 0x00,
];
let payload = [0xd2, 0x76, 0x00, 0x00, 0x85, 0x01, 0x01];
let response = pass_frame(&frame);
let expected = APDU {
header: ApduHeader {
cla: 0x00,
ins: 0xa4,
p1: 0x04,
p2: 0x00,
},
lc: 0x07,
data: payload.to_vec(),
le: 0x100,
case_type: ApduType::Short(Case::Lc1DataLe1),
};
assert_eq!(Ok(expected), response);
}
#[test]
fn test_invalid_apdu_header_length() {
let frame: [u8; 3] = [0x00, 0x12, 0x00];
let response = pass_frame(&frame);
assert_eq!(Err(ApduStatusCode::SW_WRONG_DATA), response);
}
#[test]
fn test_extended_length_apdu() {
let frame: [u8; 186] = [
0x00, 0x02, 0x03, 0x00, 0x00, 0x00, 0xb1, 0x60, 0xc5, 0xb3, 0x42, 0x58, 0x6b, 0x49,
0xdb, 0x3e, 0x72, 0xd8, 0x24, 0x4b, 0xa5, 0x6c, 0x8d, 0x79, 0x2b, 0x65, 0x08, 0xe8,
0xda, 0x9b, 0x0e, 0x2b, 0xc1, 0x63, 0x0d, 0xbc, 0xf3, 0x6d, 0x66, 0xa5, 0x46, 0x72,
0xb2, 0x22, 0xc4, 0xcf, 0x95, 0xe1, 0x51, 0xed, 0x8d, 0x4d, 0x3c, 0x76, 0x7a, 0x6c,
0xc3, 0x49, 0x43, 0x59, 0x43, 0x79, 0x4e, 0x88, 0x4f, 0x3d, 0x02, 0x3a, 0x82, 0x29,
0xfd, 0x70, 0x3f, 0x8b, 0xd4, 0xff, 0xe0, 0xa8, 0x93, 0xdf, 0x1a, 0x58, 0x34, 0x16,
0xb0, 0x1b, 0x8e, 0xbc, 0xf0, 0x2d, 0xc9, 0x99, 0x8d, 0x6f, 0xe4, 0x8a, 0xb2, 0x70,
0x9a, 0x70, 0x3a, 0x27, 0x71, 0x88, 0x3c, 0x75, 0x30, 0x16, 0xfb, 0x02, 0x11, 0x4d,
0x30, 0x54, 0x6c, 0x4e, 0x8c, 0x76, 0xb2, 0xf0, 0xa8, 0x4e, 0xd6, 0x90, 0xe4, 0x40,
0x25, 0x6a, 0xdd, 0x64, 0x63, 0x3e, 0x83, 0x4f, 0x8b, 0x25, 0xcf, 0x88, 0x68, 0x80,
0x01, 0x07, 0xdb, 0xc8, 0x64, 0xf7, 0xca, 0x4f, 0xd1, 0xc7, 0x95, 0x7c, 0xe8, 0x45,
0xbc, 0xda, 0xd4, 0xef, 0x45, 0x63, 0x5a, 0x7a, 0x65, 0x3f, 0xaa, 0x22, 0x67, 0xe7,
0x8a, 0xf2, 0x5f, 0xe8, 0x59, 0x2e, 0x0b, 0xc6, 0x85, 0xc6, 0xf7, 0x0e, 0x9e, 0xdb,
0xb6, 0x2b, 0x00, 0x00,
];
let payload: &[u8] = &frame[7..frame.len() - 2];
let response = pass_frame(&frame);
let expected = APDU {
header: ApduHeader {
cla: 0x00,
ins: 0x02,
p1: 0x03,
p2: 0x00,
},
lc: 0xb1,
data: payload.to_vec(),
le: 0x10000,
case_type: ApduType::Extended(Case::Lc3DataLe2),
};
assert_eq!(Ok(expected), response);
}
#[test]
fn test_previously_unsupported_case_type() {
let frame: [u8; 73] = [
0x00, 0x01, 0x03, 0x00, 0x00, 0x00, 0x40, 0xe3, 0x8f, 0xde, 0x51, 0x3d, 0xac, 0x9d,
0x1c, 0x6e, 0x86, 0x76, 0x31, 0x40, 0x25, 0x96, 0x86, 0x4d, 0x29, 0xe8, 0x07, 0xb3,
0x56, 0x19, 0xdf, 0x4a, 0x00, 0x02, 0xae, 0x2a, 0x8c, 0x9d, 0x5a, 0xab, 0xc3, 0x4b,
0x4e, 0xb9, 0x78, 0xb9, 0x11, 0xe5, 0x52, 0x40, 0xf3, 0x45, 0x64, 0x9c, 0xd3, 0xd7,
0xe8, 0xb5, 0x83, 0xfb, 0xe0, 0x66, 0x98, 0x4d, 0x98, 0x81, 0xf7, 0xb5, 0x49, 0x4d,
0xcb, 0x00, 0x00,
];
let payload: &[u8] = &frame[7..frame.len() - 2];
let response = pass_frame(&frame);
let expected = APDU {
header: ApduHeader {
cla: 0x00,
ins: 0x01,
p1: 0x03,
p2: 0x00,
},
lc: 0x40,
data: payload.to_vec(),
le: 0x10000,
case_type: ApduType::Extended(Case::Lc3DataLe2),
};
assert_eq!(Ok(expected), response);
}
}

32
src/ctap/ctap1.rs
View File

@@ -642,6 +642,14 @@ mod test {
assert_eq!(response, Err(Ctap1StatusCode::SW_WRONG_DATA));
}
fn check_signature_counter(response: &[u8; 4], signature_counter: u32) {
if USE_SIGNATURE_COUNTER {
assert_eq!(u32::from_be_bytes(*response), signature_counter);
} else {
assert_eq!(response, &[0x00, 0x00, 0x00, 0x00]);
}
}
#[test]
fn test_process_authenticate_enforce() {
let mut rng = ThreadRng256 {};
@@ -662,11 +670,13 @@ mod test {
let response =
Ctap1Command::process_command(&message, &mut ctap_state, START_CLOCK_VALUE).unwrap();
assert_eq!(response[0], 0x01);
if USE_SIGNATURE_COUNTER {
assert_eq!(response[1..5], [0x00, 0x00, 0x00, 0x01]);
} else {
assert_eq!(response[1..5], [0x00, 0x00, 0x00, 0x00]);
}
check_signature_counter(
array_ref!(response, 1, 4),
ctap_state
.persistent_store
.global_signature_counter()
.unwrap(),
);
}
#[test]
@@ -690,11 +700,13 @@ mod test {
let response =
Ctap1Command::process_command(&message, &mut ctap_state, TIMEOUT_CLOCK_VALUE).unwrap();
assert_eq!(response[0], 0x01);
if USE_SIGNATURE_COUNTER {
assert_eq!(response[1..5], [0x00, 0x00, 0x00, 0x01]);
} else {
assert_eq!(response[1..5], [0x00, 0x00, 0x00, 0x00]);
}
check_signature_counter(
array_ref!(response, 1, 4),
ctap_state
.persistent_store
.global_signature_counter()
.unwrap(),
);
}
#[test]

99
src/ctap/mod.rs
View File

@@ -12,6 +12,7 @@
// See the License for the specific language governing permissions and
// limitations under the License.
pub mod apdu;
pub mod command;
#[cfg(feature = "with_ctap1")]
mod ctap1;
@@ -80,6 +81,7 @@ const USE_BATCH_ATTESTATION: bool = false;
// need a flash storage friendly way to implement this feature. The implemented
// solution is a compromise to be compatible with U2F and not wasting storage.
const USE_SIGNATURE_COUNTER: bool = true;
pub const INITIAL_SIGNATURE_COUNTER: u32 = 1;
// Our credential ID consists of
// - 16 byte initialization vector for AES-256,
// - 32 byte ECDSA private key for the credential,
@@ -214,7 +216,9 @@ where
pub fn increment_global_signature_counter(&mut self) -> Result<(), Ctap2StatusCode> {
if USE_SIGNATURE_COUNTER {
self.persistent_store.incr_global_signature_counter()?;
let increment = self.rng.gen_uniform_u32x8()[0] % 8 + 1;
self.persistent_store
.incr_global_signature_counter(increment)?;
}
Ok(())
}
@@ -1095,8 +1099,9 @@ mod test {
let mut expected_auth_data = vec![
0xA3, 0x79, 0xA6, 0xF6, 0xEE, 0xAF, 0xB9, 0xA5, 0x5E, 0x37, 0x8C, 0x11, 0x80,
0x34, 0xE2, 0x75, 0x1E, 0x68, 0x2F, 0xAB, 0x9F, 0x2D, 0x30, 0xAB, 0x13, 0xD2,
0x12, 0x55, 0x86, 0xCE, 0x19, 0x47, 0x41, 0x00, 0x00, 0x00, 0x00,
0x12, 0x55, 0x86, 0xCE, 0x19, 0x47, 0x41, 0x00, 0x00, 0x00,
];
expected_auth_data.push(INITIAL_SIGNATURE_COUNTER as u8);
expected_auth_data.extend(&ctap_state.persistent_store.aaguid().unwrap());
expected_auth_data.extend(&[0x00, 0x20]);
assert_eq!(
@@ -1132,8 +1137,9 @@ mod test {
let mut expected_auth_data = vec![
0xA3, 0x79, 0xA6, 0xF6, 0xEE, 0xAF, 0xB9, 0xA5, 0x5E, 0x37, 0x8C, 0x11, 0x80,
0x34, 0xE2, 0x75, 0x1E, 0x68, 0x2F, 0xAB, 0x9F, 0x2D, 0x30, 0xAB, 0x13, 0xD2,
0x12, 0x55, 0x86, 0xCE, 0x19, 0x47, 0x41, 0x00, 0x00, 0x00, 0x00,
0x12, 0x55, 0x86, 0xCE, 0x19, 0x47, 0x41, 0x00, 0x00, 0x00,
];
expected_auth_data.push(INITIAL_SIGNATURE_COUNTER as u8);
expected_auth_data.extend(&ctap_state.persistent_store.aaguid().unwrap());
expected_auth_data.extend(&[0x00, CREDENTIAL_ID_BASE_SIZE as u8]);
assert_eq!(
@@ -1281,8 +1287,9 @@ mod test {
let mut expected_auth_data = vec![
0xA3, 0x79, 0xA6, 0xF6, 0xEE, 0xAF, 0xB9, 0xA5, 0x5E, 0x37, 0x8C, 0x11, 0x80,
0x34, 0xE2, 0x75, 0x1E, 0x68, 0x2F, 0xAB, 0x9F, 0x2D, 0x30, 0xAB, 0x13, 0xD2,
0x12, 0x55, 0x86, 0xCE, 0x19, 0x47, 0xC1, 0x00, 0x00, 0x00, 0x00,
0x12, 0x55, 0x86, 0xCE, 0x19, 0x47, 0xC1, 0x00, 0x00, 0x00,
];
expected_auth_data.push(INITIAL_SIGNATURE_COUNTER as u8);
expected_auth_data.extend(&ctap_state.persistent_store.aaguid().unwrap());
expected_auth_data.extend(&[0x00, CREDENTIAL_ID_MAX_SIZE as u8]);
assert_eq!(
@@ -1330,8 +1337,9 @@ mod test {
let mut expected_auth_data = vec![
0xA3, 0x79, 0xA6, 0xF6, 0xEE, 0xAF, 0xB9, 0xA5, 0x5E, 0x37, 0x8C, 0x11, 0x80,
0x34, 0xE2, 0x75, 0x1E, 0x68, 0x2F, 0xAB, 0x9F, 0x2D, 0x30, 0xAB, 0x13, 0xD2,
0x12, 0x55, 0x86, 0xCE, 0x19, 0x47, 0xC1, 0x00, 0x00, 0x00, 0x00,
0x12, 0x55, 0x86, 0xCE, 0x19, 0x47, 0xC1, 0x00, 0x00, 0x00,
];
expected_auth_data.push(INITIAL_SIGNATURE_COUNTER as u8);
expected_auth_data.extend(&ctap_state.persistent_store.aaguid().unwrap());
expected_auth_data.extend(&[0x00, 0x20]);
assert_eq!(
@@ -1373,6 +1381,7 @@ mod test {
response: Result<ResponseData, Ctap2StatusCode>,
expected_user: PublicKeyCredentialUserEntity,
flags: u8,
signature_counter: u32,
expected_number_of_credentials: Option<u64>,
) {
match response.unwrap() {
@@ -1383,11 +1392,16 @@ mod test {
number_of_credentials,
..
} = get_assertion_response;
let expected_auth_data = vec![
let mut expected_auth_data = vec![
0xA3, 0x79, 0xA6, 0xF6, 0xEE, 0xAF, 0xB9, 0xA5, 0x5E, 0x37, 0x8C, 0x11, 0x80,
0x34, 0xE2, 0x75, 0x1E, 0x68, 0x2F, 0xAB, 0x9F, 0x2D, 0x30, 0xAB, 0x13, 0xD2,
0x12, 0x55, 0x86, 0xCE, 0x19, 0x47, flags, 0x00, 0x00, 0x00, 0x01,
0x12, 0x55, 0x86, 0xCE, 0x19, 0x47, flags, 0x00, 0x00, 0x00, 0x00,
];
let signature_counter_position = expected_auth_data.len() - 4;
BigEndian::write_u32(
&mut expected_auth_data[signature_counter_position..],
signature_counter,
);
assert_eq!(auth_data, expected_auth_data);
assert_eq!(user, Some(expected_user));
assert_eq!(number_of_credentials, expected_number_of_credentials);
@@ -1399,6 +1413,7 @@ mod test {
fn check_assertion_response(
response: Result<ResponseData, Ctap2StatusCode>,
expected_user_id: Vec<u8>,
signature_counter: u32,
expected_number_of_credentials: Option<u64>,
) {
let expected_user = PublicKeyCredentialUserEntity {
@@ -1411,6 +1426,7 @@ mod test {
response,
expected_user,
0x00,
signature_counter,
expected_number_of_credentials,
);
}
@@ -1443,7 +1459,11 @@ mod test {
DUMMY_CHANNEL_ID,
DUMMY_CLOCK_VALUE,
);
check_assertion_response(get_assertion_response, vec![0x1D], None);
let signature_counter = ctap_state
.persistent_store
.global_signature_counter()
.unwrap();
check_assertion_response(get_assertion_response, vec![0x1D], signature_counter, None);
}
#[test]
@@ -1636,7 +1656,11 @@ mod test {
DUMMY_CHANNEL_ID,
DUMMY_CLOCK_VALUE,
);
check_assertion_response(get_assertion_response, vec![0x1D], None);
let signature_counter = ctap_state
.persistent_store
.global_signature_counter()
.unwrap();
check_assertion_response(get_assertion_response, vec![0x1D], signature_counter, None);
let credential = PublicKeyCredentialSource {
key_type: PublicKeyCredentialType::PublicKey,
@@ -1739,10 +1763,26 @@ mod test {
DUMMY_CHANNEL_ID,
DUMMY_CLOCK_VALUE,
);
check_assertion_response_with_user(get_assertion_response, user2, 0x04, Some(2));
let signature_counter = ctap_state
.persistent_store
.global_signature_counter()
.unwrap();
check_assertion_response_with_user(
get_assertion_response,
user2,
0x04,
signature_counter,
Some(2),
);
let get_assertion_response = ctap_state.process_get_next_assertion(DUMMY_CLOCK_VALUE);
check_assertion_response_with_user(get_assertion_response, user1, 0x04, None);
check_assertion_response_with_user(
get_assertion_response,
user1,
0x04,
signature_counter,
None,
);
let get_assertion_response = ctap_state.process_get_next_assertion(DUMMY_CLOCK_VALUE);
assert_eq!(
@@ -1799,13 +1839,22 @@ mod test {
DUMMY_CHANNEL_ID,
DUMMY_CLOCK_VALUE,
);
check_assertion_response(get_assertion_response, vec![0x03], Some(3));
let signature_counter = ctap_state
.persistent_store
.global_signature_counter()
.unwrap();
check_assertion_response(
get_assertion_response,
vec![0x03],
signature_counter,
Some(3),
);
let get_assertion_response = ctap_state.process_get_next_assertion(DUMMY_CLOCK_VALUE);
check_assertion_response(get_assertion_response, vec![0x02], None);
check_assertion_response(get_assertion_response, vec![0x02], signature_counter, None);
let get_assertion_response = ctap_state.process_get_next_assertion(DUMMY_CLOCK_VALUE);
check_assertion_response(get_assertion_response, vec![0x01], None);
check_assertion_response(get_assertion_response, vec![0x01], signature_counter, None);
let get_assertion_response = ctap_state.process_get_next_assertion(DUMMY_CLOCK_VALUE);
assert_eq!(
@@ -2041,4 +2090,26 @@ mod test {
.is_none());
}
}
#[test]
fn test_signature_counter() {
let mut rng = ThreadRng256 {};
let user_immediately_present = |_| Ok(());
let mut ctap_state = CtapState::new(&mut rng, user_immediately_present, DUMMY_CLOCK_VALUE);
let mut last_counter = ctap_state
.persistent_store
.global_signature_counter()
.unwrap();
assert!(last_counter > 0);
for _ in 0..100 {
assert!(ctap_state.increment_global_signature_counter().is_ok());
let next_counter = ctap_state
.persistent_store
.global_signature_counter()
.unwrap();
assert!(next_counter > last_counter);
last_counter = next_counter;
}
}
}

29
src/ctap/storage.rs
View File

@@ -20,6 +20,7 @@ use crate::ctap::data_formats::{CredentialProtectionPolicy, PublicKeyCredentialS
use crate::ctap::key_material;
use crate::ctap::pin_protocol_v1::PIN_AUTH_LENGTH;
use crate::ctap::status_code::Ctap2StatusCode;
use crate::ctap::INITIAL_SIGNATURE_COUNTER;
#[cfg(feature = "with_ctap2_1")]
use alloc::string::String;
#[cfg(any(test, feature = "ram_storage", feature = "with_ctap2_1"))]
@@ -295,17 +296,17 @@ impl PersistentStore {
/// Returns the global signature counter.
pub fn global_signature_counter(&self) -> Result<u32, Ctap2StatusCode> {
match self.store.find(key::GLOBAL_SIGNATURE_COUNTER)? {
None => Ok(0),
None => Ok(INITIAL_SIGNATURE_COUNTER),
Some(value) if value.len() == 4 => Ok(u32::from_ne_bytes(*array_ref!(&value, 0, 4))),
Some(_) => Err(Ctap2StatusCode::CTAP2_ERR_VENDOR_INVALID_PERSISTENT_STORAGE),
}
}
/// Increments the global signature counter.
pub fn incr_global_signature_counter(&mut self) -> Result<(), Ctap2StatusCode> {
pub fn incr_global_signature_counter(&mut self, increment: u32) -> Result<(), Ctap2StatusCode> {
let old_value = self.global_signature_counter()?;
// In hopes that servers handle the wrapping gracefully.
let new_value = old_value.wrapping_add(1);
let new_value = old_value.wrapping_add(increment);
self.store
.insert(key::GLOBAL_SIGNATURE_COUNTER, &new_value.to_ne_bytes())?;
Ok(())
@@ -1044,6 +1045,28 @@ mod test {
assert_eq!(persistent_store._min_pin_length_rp_ids().unwrap(), rp_ids);
}
#[test]
fn test_global_signature_counter() {
let mut rng = ThreadRng256 {};
let mut persistent_store = PersistentStore::new(&mut rng);
let mut counter_value = 1;
assert_eq!(
persistent_store.global_signature_counter().unwrap(),
counter_value
);
for increment in 1..10 {
assert!(persistent_store
.incr_global_signature_counter(increment)
.is_ok());
counter_value += increment;
assert_eq!(
persistent_store.global_signature_counter().unwrap(),
counter_value
);
}
}
#[test]
fn test_serialize_deserialize_credential() {
let mut rng = ThreadRng256 {};

3
src/lib.rs
View File

@@ -18,3 +18,6 @@ extern crate alloc;
pub mod ctap;
pub mod embedded_flash;
#[macro_use]
extern crate arrayref;

3
src/main.rs
View File

@@ -18,6 +18,9 @@ extern crate alloc;
#[cfg(feature = "std")]
extern crate core;
extern crate lang_items;
#[macro_use]
extern crate arrayref;
extern crate byteorder;
mod ctap;
pub mod embedded_flash;