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feat: init commit,fork from google native-pkcs11

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Hatter Jiang
2024-07-06 19:06:25 +08:00
parent 27039d66bb
commit 33f33d2aa6
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[package]
name = "native-pkcs11-piv"
version = "0.2.18"
description = "native-pkcs11 backend for macos keychain."
authors.workspace = true
edition.workspace = true
rust-version.workspace = true
repository.workspace = true
license.workspace = true
[dependencies]
native-pkcs11-traits = { version = "0.2.0", path = "../native-pkcs11-traits" }
p256 = { version = "0.13.2", default-features = false, features = [
"arithmetic",
"pkcs8",
"std",
] }
rand = "0.8.5"
rsa = { version = "0.9.6", default-features = false, features = ["std"] }
# TODO: temporary workaround for RustCrypto/traits#1262, remove after upgrading
# the p256 package past 0.13.0.
spki = { version = "0.7.3", features = ["std"] }
thiserror = "1.0.61"
tracing = "0.1.40"
tracing-error = { version = "0.2.0", default-features = false }
x509-cert = { version = "0.2.5", default-features = false }
yubikey = { version = "0.8.0", features = ["untested"] }
[dev-dependencies]
serial_test = { version = "3.1.1", default-features = false }
[target.'cfg(target_os="macos")'.dependencies]
core-foundation = { version = "0.9.4", features = ["mac_os_10_8_features"] }
security-framework = { version = "2.11.0", features = ["OSX_10_15"] }
security-framework-sys = { version = "2.11.0", features = ["OSX_10_15"] }

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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/// Workaround for platform-specific crates in workspace root.
/// https://github.com/rust-lang/cargo/issues/5220
mod piv;
pub use piv::*;

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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use std::{collections::HashMap, sync::Arc};
use core_foundation::{
base::{TCFType, ToVoid},
string::CFString,
};
use native_pkcs11_traits::Backend;
use security_framework::{item::KeyClass, key::SecKey};
use security_framework_sys::item::kSecAttrLabel;
use tracing::instrument;
use crate::{
certificate::{find_all_certificates, YubikeyPivCertificate},
key::{
find_all_keys,
find_key,
find_key2,
generate_key,
Algorithm,
YubikeyPivPrivateKey,
YubikeyPivPublicKey,
},
keychain,
};
#[derive(Debug, Default)]
pub struct YubikeyPivBackend;
impl YubikeyPivBackend {
pub fn new() -> Self {
Self
}
}
impl Backend for YubikeyPivBackend {
fn name(&self) -> String {
"Keychain".into()
}
#[instrument]
fn find_all_certificates(
&self,
) -> native_pkcs11_traits::Result<Vec<Box<dyn native_pkcs11_traits::Certificate>>> {
let certs = find_all_certificates()?
.into_iter()
.map(YubikeyPivCertificate::new)
.filter_map(Result::ok)
.map(|cert| Box::new(cert) as _)
.collect();
Ok(certs)
}
#[instrument]
fn find_private_key(
&self,
query: native_pkcs11_traits::KeySearchOptions,
) -> native_pkcs11_traits::Result<Option<Arc<dyn native_pkcs11_traits::PrivateKey>>> {
let mut pubkeys_by_pubkey_hash: HashMap<Vec<u8>, SecKey> =
HashMap::from_iter(find_all_certificates()?.into_iter().filter_map(|c| {
c.certificate()
.ok()
.and_then(|cert| cert.public_key().ok())
.and_then(|pk| pk.application_label().map(|pubkey_hash| (pubkey_hash, pk)))
}));
let mut find_pubkey_for_seckey = |sec_key: &SecKey| -> Option<YubikeyPivPublicKey> {
sec_key
.application_label()
.and_then(|pubkey_hash| pubkeys_by_pubkey_hash.remove(&pubkey_hash))
// TODO(kcking): populate label if searching by label
.and_then(|sec_key| YubikeyPivPublicKey::new(sec_key, "").ok())
};
let opt_key = match query {
native_pkcs11_traits::KeySearchOptions::Label(label) => {
find_key(KeyClass::private(), &label)
.ok()
.map(|sec_key| {
let cert = find_pubkey_for_seckey(&sec_key);
YubikeyPivPrivateKey::new(sec_key, label, cert)
})
.transpose()?
}
native_pkcs11_traits::KeySearchOptions::PublicKeyHash(public_key_hash) => {
find_key2(KeyClass::private(), &public_key_hash)?
.map(|sec_key| {
let cert = find_pubkey_for_seckey(&sec_key);
YubikeyPivPrivateKey::new(sec_key, "", cert)
})
.transpose()?
}
};
Ok(opt_key.map(|sec_key| Arc::new(sec_key) as _))
}
#[instrument]
fn find_public_key(
&self,
query: native_pkcs11_traits::KeySearchOptions,
) -> native_pkcs11_traits::Result<Option<Box<dyn native_pkcs11_traits::PublicKey>>> {
let opt_key = match query {
native_pkcs11_traits::KeySearchOptions::Label(label) => {
find_key(KeyClass::public(), &label)
.ok()
.map(|sec_key| YubikeyPivPublicKey::new(sec_key, label))
.transpose()?
}
native_pkcs11_traits::KeySearchOptions::PublicKeyHash(public_key_hash) => {
find_key2(KeyClass::public(), &public_key_hash)?
.map(|sec_key| YubikeyPivPublicKey::new(sec_key, ""))
.transpose()?
}
};
Ok(opt_key.map(|sec_key| Box::new(sec_key) as _))
}
#[instrument]
fn generate_key(
&self,
algorithm: native_pkcs11_traits::KeyAlgorithm,
label: Option<&str>,
) -> native_pkcs11_traits::Result<Arc<dyn native_pkcs11_traits::PrivateKey>> {
let alg = match algorithm {
native_pkcs11_traits::KeyAlgorithm::Rsa => Algorithm::RSA,
native_pkcs11_traits::KeyAlgorithm::Ecc => Algorithm::ECC,
};
let label = label.unwrap_or("");
Ok(generate_key(alg, label, Some(keychain::location()?))
.map(|key| YubikeyPivPrivateKey::new(key, label, None).map(Arc::new))??)
}
fn find_all_private_keys(
&self,
) -> native_pkcs11_traits::Result<Vec<Arc<dyn native_pkcs11_traits::PrivateKey>>> {
let sec_keys = find_all_keys(KeyClass::private())?;
let keys = sec_keys
.into_iter()
.filter_map(|sec_key| {
let label: Option<String> = sec_key
.attributes()
.find(unsafe { kSecAttrLabel }.to_void())
.map(|label| {
unsafe { CFString::wrap_under_get_rule(label.cast()) }.to_string()
});
let label: String = label.unwrap_or_default();
YubikeyPivPrivateKey::new(sec_key, label, None).ok()
})
.map(|k| Arc::new(k) as _);
Ok(keys.collect())
}
fn find_all_public_keys(
&self,
) -> native_pkcs11_traits::Result<Vec<Arc<dyn native_pkcs11_traits::PublicKey>>> {
let sec_keys = find_all_keys(KeyClass::public())?;
let keys = sec_keys
.into_iter()
.filter_map(|sec_key| {
let label: Option<String> = sec_key
.attributes()
.find(unsafe { kSecAttrLabel }.to_void())
.map(|label| {
unsafe { CFString::wrap_under_get_rule(label.cast()) }.to_string()
});
let label: String = label.unwrap_or_default();
YubikeyPivPublicKey::new(sec_key, label).ok()
})
.map(|k| Arc::new(k) as _);
Ok(keys.collect())
}
}

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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use std::{
str::FromStr,
time::{Duration, SystemTime},
};
use native_pkcs11_traits::random_label;
use rsa::{pkcs1::DecodeRsaPublicKey, pkcs8::AssociatedOid};
use security_framework::{
certificate::SecCertificate,
identity::SecIdentity,
item::{add_item, AddRef, ItemAddOptions, ItemClass, Reference},
key::SecKey,
os::macos::identity::SecIdentityExt,
};
use security_framework_sys::base::errSecItemNotFound;
use x509_cert::{
der::{
asn1::{GeneralizedTime, Ia5String, OctetString},
oid::ObjectIdentifier,
Decode,
Encode,
},
ext::{
pkix::{
name::GeneralName,
AuthorityKeyIdentifier,
BasicConstraints,
ExtendedKeyUsage,
KeyUsage,
KeyUsages,
SubjectAltName,
SubjectKeyIdentifier,
},
Extension,
},
name::{Name, RdnSequence},
serial_number::SerialNumber,
spki::{der::asn1::BitString, EncodePublicKey, SubjectPublicKeyInfo},
time::Validity,
Certificate,
TbsCertificate,
};
use crate::{
key::{Algorithm, YubikeyPivPublicKey},
keychain,
Result,
};
pub struct YubikeyPivCertificate {
pub label: String,
pub identity: SecIdentity,
pub public_key: YubikeyPivPublicKey,
certificate_der: Vec<u8>,
}
impl YubikeyPivCertificate {
pub fn new(identity: impl Into<SecIdentity>) -> Result<Self> {
let identity: SecIdentity = identity.into();
let label = identity.certificate().unwrap().subject_summary();
let pk = identity.certificate()?.public_key()?;
Ok(Self {
certificate_der: identity.certificate()?.to_der(),
label: label.clone(),
identity,
public_key: YubikeyPivPublicKey::new(pk, label)?,
})
}
}
impl std::fmt::Debug for YubikeyPivCertificate {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("KeychainCertificate")
.field("label", &self.label)
.field("identity", &self.identity)
.finish()
}
}
impl native_pkcs11_traits::Certificate for YubikeyPivCertificate {
fn label(&self) -> String {
self.label.to_string()
}
fn public_key(&self) -> &dyn native_pkcs11_traits::PublicKey {
&self.public_key
}
fn to_der(&self) -> Vec<u8> {
self.certificate_der.clone()
}
fn delete(self: Box<Self>) {
let _ = self.identity.delete();
}
}
pub fn import_certificate(der: &[u8]) -> Result<SecCertificate> {
let cert = SecCertificate::from_der(der)?;
let add_params = ItemAddOptions::new(security_framework::item::ItemAddValue::Ref(
AddRef::Certificate(cert.clone()),
))
.set_location(keychain::location()?)
.set_label(cert.subject_summary())
.to_dictionary();
add_item(add_params)?;
Ok(cert)
}
pub fn find_certificate(pub_key_hash: &[u8]) -> Result<Option<SecIdentity>> {
let results = crate::piv::keychain::item_search_options()?
.load_refs(true)
.class(ItemClass::certificate())
.pub_key_hash(pub_key_hash)
.search()?;
if results.is_empty() {
return Ok(None);
}
let cert = match results.into_iter().next().ok_or("certificate not found")? {
security_framework::item::SearchResult::Ref(Reference::Certificate(certificate)) => {
certificate
}
_ => return Err("no key ref")?,
};
Ok(Some(SecIdentity::with_certificate(&[], &cert)?))
}
pub fn find_all_certificates() -> Result<Vec<SecIdentity>> {
let results = crate::piv::keychain::item_search_options()?
.load_refs(true)
.class(ItemClass::identity())
.limit(99)
.search();
if let Err(e) = results {
if e.code() == errSecItemNotFound {
return Ok(vec![]);
}
}
let loaded_identites = results?
.into_iter()
.filter_map(|result| match result {
security_framework::item::SearchResult::Ref(Reference::Identity(identity)) => {
Some(identity)
}
_ => None,
})
.collect();
Ok(loaded_identites)
}
// NOTE(kcking): After some empirical tests, it appears SecIdentity is really
// just a SecCertificate that happens to have an associated SecKey private key
// in the keychain. Both `SecItemAdd` and `SecItemDelete` treat a SecIdentity
// like it is the underlying SecCertificate. Further reading:
// https://stackoverflow.com/a/13041370.
//
// For example, if we import a SecCertificate, then convert it to a SecIdentity
// with SecIdentity::with_certificate, trying to import the resulting
// SecIdentity will error with "already exists". Keychain is treating this
// scenario as trying to import the same certificate twice.
//
// An official Apple source also _hints_ at this behavior by saying "working
// with identities as keychain items is very much like working with
// certificates"
// https://developer.apple.com/documentation/security/certificate_key_and_trust_services/identities/storing_an_identity_in_the_keychain?language=objc.
//
// Overall, this means storing SecIdentities isn't any more useful to us than
// storing SecCertificates. The main use case is using
// `SecIdentity::with_certificate` to search for the private key corresponding
// to a certificate.
pub fn import_identity(certificate: &SecCertificate) -> Result<SecIdentity> {
let keychain = keychain::keychain_or_default()?;
let identity = SecIdentity::with_certificate(&[keychain], certificate)?;
let add_params = ItemAddOptions::new(security_framework::item::ItemAddValue::Ref(
AddRef::Identity(identity.clone()),
))
.set_location(keychain::location()?)
.set_label(certificate.subject_summary())
.to_dictionary();
match add_item(add_params) {
Ok(_) => Ok(identity),
Err(e)
if e.message() == Some("The specified item already exists in the keychain.".into()) =>
{
Ok(identity)
}
Err(e) => Err(e.into()),
}
}
pub fn random_serial_number() -> [u8; 16] {
use rand::Rng;
rand::thread_rng().gen::<u128>().to_be_bytes()
}
const EXTENDED_KEY_USAGE_SERVER_AUTHENTICATION: ObjectIdentifier =
ObjectIdentifier::new_unwrap("1.3.6.1.5.5.7.3.1");
const EXTENDED_KEY_USAGE_CLIENT_AUTHENTICATION: ObjectIdentifier =
ObjectIdentifier::new_unwrap("1.3.6.1.5.5.7.3.2");
/// Demonstrate signing a certificate
pub fn self_signed_certificate(key_algorithm: Algorithm, private_key: &SecKey) -> Result<Vec<u8>> {
let public_key = private_key
.public_key()
.ok_or("no public key")?
.external_representation()
.ok_or("no external representation")?
.to_vec();
let public_key = match key_algorithm {
Algorithm::RSA => rsa::RsaPublicKey::from_pkcs1_der(&public_key)?
.to_public_key_der()?
.as_bytes()
.to_owned(),
Algorithm::ECC => p256::PublicKey::from_sec1_bytes(public_key.as_slice())?
.to_public_key_der()?
.as_bytes()
.to_owned(),
};
let spki = SubjectPublicKeyInfo::try_from(public_key.as_slice())?;
let subject_name =
RdnSequence::from_str(&format!("cn=Test Cert {}", random_label()))?.to_der()?;
let issuer_name = RdnSequence::from_str("cn=GShoe LLC")?.to_der()?;
let serial_number = random_serial_number();
let san = GeneralName::DnsName(Ia5String::new("localhost")?);
let san = SubjectAltName(vec![san]).to_der()?;
let key_usage = KeyUsage(
KeyUsages::DigitalSignature | KeyUsages::KeyEncipherment | KeyUsages::KeyAgreement,
)
.to_der()?;
let extended_key_usage = ExtendedKeyUsage(vec![
EXTENDED_KEY_USAGE_CLIENT_AUTHENTICATION,
EXTENDED_KEY_USAGE_SERVER_AUTHENTICATION,
])
.to_der()?;
let basic_constraints = BasicConstraints {
ca: false,
path_len_constraint: None,
}
.to_der()?;
let sk_and_ak_id = random_serial_number();
let sk_id = SubjectKeyIdentifier(OctetString::new(sk_and_ak_id)?).to_der()?;
let ak_id = AuthorityKeyIdentifier {
key_identifier: Some(OctetString::new(sk_and_ak_id)?),
authority_cert_issuer: None,
authority_cert_serial_number: None,
}
.to_der()?;
let tbs_certificate = TbsCertificate {
version: x509_cert::Version::V3,
// NOTE: can't be empty
serial_number: SerialNumber::new(&serial_number)?,
signature: spki.algorithm.clone(),
issuer: Name::from_der(&issuer_name)?,
validity: Validity {
not_before: x509_cert::time::Time::GeneralTime(GeneralizedTime::from_system_time(
SystemTime::now() - Duration::from_secs(60 * 60 * 24),
)?),
not_after: x509_cert::time::Time::GeneralTime(GeneralizedTime::from_system_time(
SystemTime::now() + Duration::from_secs(60 * 60 * 24),
)?),
},
subject: Name::from_der(&subject_name)?,
subject_public_key_info: spki.clone(),
// webpki appears to not support these fields:
// https://github.com/briansmith/webpki/blob/17d9189981a618120fd8217a913828e7418e2484/src/cert.rs#L78
issuer_unique_id: None,
subject_unique_id: None,
extensions: Some(vec![
Extension {
extn_id: BasicConstraints::OID,
critical: true,
extn_value: OctetString::new(basic_constraints)?,
},
Extension {
extn_id: SubjectAltName::OID,
critical: false,
extn_value: OctetString::new(san)?,
},
Extension {
extn_id: KeyUsage::OID,
critical: true,
extn_value: OctetString::new(key_usage)?,
},
Extension {
extn_id: ExtendedKeyUsage::OID,
critical: false,
extn_value: OctetString::new(extended_key_usage)?,
},
Extension {
extn_id: SubjectKeyIdentifier::OID,
critical: false,
extn_value: OctetString::new(sk_id)?,
},
Extension {
extn_id: AuthorityKeyIdentifier::OID,
critical: false,
extn_value: OctetString::new(ak_id)?,
},
]),
};
let payload = tbs_certificate.to_der()?;
let signature = private_key.create_signature(
match key_algorithm {
Algorithm::RSA => security_framework_sys::key::Algorithm::RSASignatureMessagePSSSHA256,
Algorithm::ECC => {
security_framework_sys::key::Algorithm::ECDSASignatureMessageX962SHA256
}
},
&payload,
)?;
let cert = Certificate {
tbs_certificate,
signature_algorithm: spki.algorithm,
signature: BitString::from_bytes(signature.as_slice())?,
};
Ok(cert.to_der()?)
}
#[cfg(test)]
mod test {
use native_pkcs11_traits::random_label;
use serial_test::serial;
use super::*;
#[test]
#[serial]
#[ignore = "https://github.com/google/native-pkcs11/issues/302"]
fn test_self_signed_certificate() -> Result<()> {
use security_framework::item::{ItemClass, Limit};
use crate::key::generate_key;
let label = random_label();
let key = generate_key(Algorithm::RSA, &label, Some(keychain::location()?))?;
let cert = self_signed_certificate(Algorithm::RSA, &key)?;
let cert = import_certificate(&cert)?;
// NOTE(kcking): Importing a certificate that has a private key already
// stored in the keychain will treat that certificate as an identity, even
// without calling import_identity.
// let identity = import_identity(&cert)?;
// HACK(kcking): The macOS keychain takes some time to flush all of the updates
// such that they are visible to the next search query.
std::thread::sleep(std::time::Duration::from_secs(1));
assert!(
crate::piv::keychain::item_search_options()?
.class(ItemClass::identity())
.limit(Limit::All)
.load_refs(true)
.search()?
.iter()
.any(|result| match result {
security_framework::item::SearchResult::Ref(
security_framework::item::Reference::Identity(id),
) => id.certificate().unwrap().subject() == cert.subject(),
_ => false,
})
);
// Clean up
cert.delete()?;
// NOTE(kcking): Deleting the certificate also deletes the identity since
// they are the same underlying object, so identity.delete() is not needed.
// identity.delete()?;
key.public_key().ok_or("no public key")?.delete()?;
key.delete()?;
Ok(())
}
}

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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use std::fmt::Debug;
use core_foundation::base::ToVoid;
use native_pkcs11_traits::{KeyAlgorithm, PrivateKey, PublicKey, SignatureAlgorithm};
use security_framework::{
item::{ItemClass, KeyClass, Limit, Location, Reference},
key::{GenerateKeyOptions, KeyType, SecKey},
};
// TODO(bweeks,kcking): remove dependency on security-framework-sys crate.
use security_framework_sys::item::{
kSecAttrKeyType,
kSecAttrKeyTypeEC,
kSecAttrKeyTypeRSA,
kSecAttrTokenID,
};
use tracing::instrument;
use crate::Result;
#[derive(Debug)]
pub enum Algorithm {
RSA,
ECC,
}
fn sigalg_to_seckeyalg(
signature_algorithm: &SignatureAlgorithm,
) -> Result<security_framework_sys::key::Algorithm> {
use security_framework_sys::key::Algorithm::*;
let alg = match signature_algorithm {
native_pkcs11_traits::SignatureAlgorithm::Ecdsa => ECDSASignatureRFC4754,
native_pkcs11_traits::SignatureAlgorithm::RsaRaw => RSASignatureRaw,
native_pkcs11_traits::SignatureAlgorithm::RsaPkcs1v15Raw => RSASignatureDigestPKCS1v15Raw,
native_pkcs11_traits::SignatureAlgorithm::RsaPkcs1v15Sha1 => {
RSASignatureMessagePKCS1v15SHA1
}
native_pkcs11_traits::SignatureAlgorithm::RsaPkcs1v15Sha384 => {
RSASignatureMessagePKCS1v15SHA384
}
native_pkcs11_traits::SignatureAlgorithm::RsaPkcs1v15Sha256 => {
RSASignatureMessagePKCS1v15SHA256
}
native_pkcs11_traits::SignatureAlgorithm::RsaPkcs1v15Sha512 => {
RSASignatureMessagePKCS1v15SHA512
}
native_pkcs11_traits::SignatureAlgorithm::RsaPss {
digest,
mask_generation_function,
salt_length,
} => {
// SecurityFramework only supports digest == mgf, salt_length == len(digest).
if digest != mask_generation_function || digest.digest_len() != *salt_length as usize {
return Err(crate::ErrorKind::UnsupportedSignatureAlgorithm(
signature_algorithm.clone(),
)
.into());
}
match mask_generation_function {
native_pkcs11_traits::DigestType::Sha1 => RSASignatureDigestPSSSHA1,
native_pkcs11_traits::DigestType::Sha224 => RSASignatureDigestPSSSHA224,
native_pkcs11_traits::DigestType::Sha256 => RSASignatureDigestPSSSHA256,
native_pkcs11_traits::DigestType::Sha384 => RSASignatureDigestPSSSHA384,
native_pkcs11_traits::DigestType::Sha512 => RSASignatureDigestPSSSHA512,
}
}
};
Ok(alg)
}
#[derive(Debug)]
pub struct YubikeyPivPrivateKey {
sec_key: SecKey,
label: String,
public_key_hash: Vec<u8>,
algorithm: KeyAlgorithm,
pub_key: Option<YubikeyPivPublicKey>,
}
impl YubikeyPivPrivateKey {
#[instrument]
pub fn new(
sec_key: SecKey,
label: impl Into<String> + Debug,
pub_key: Option<YubikeyPivPublicKey>,
) -> Result<Self> {
let label = label.into();
let public_key_hash = sec_key.application_label().ok_or("no application_label")?;
Ok(Self {
algorithm: sec_key_algorithm(&sec_key)?,
sec_key,
label,
public_key_hash,
pub_key,
})
}
}
impl PrivateKey for YubikeyPivPrivateKey {
#[instrument]
fn public_key_hash(&self) -> Vec<u8> {
self.public_key_hash.clone()
}
#[instrument]
fn label(&self) -> String {
self.label.clone()
}
#[instrument]
fn sign(
&self,
algorithm: &native_pkcs11_traits::SignatureAlgorithm,
data: &[u8],
) -> native_pkcs11_traits::Result<Vec<u8>> {
let algorithm = sigalg_to_seckeyalg(algorithm)?;
Ok(self.sec_key.create_signature(algorithm, data.as_ref())?)
}
#[instrument]
fn delete(&self) {
let _ = self.sec_key.delete();
}
#[instrument]
fn algorithm(&self) -> KeyAlgorithm {
self.algorithm
}
fn find_public_key(
&self,
_backend: &dyn native_pkcs11_traits::Backend,
) -> native_pkcs11_traits::Result<Option<Box<dyn PublicKey>>> {
let sec_copy = self
.sec_key
.public_key()
.map(|sec_key| YubikeyPivPublicKey::new(sec_key, self.label()))
.transpose()
.ok()
.flatten()
.map(|key| Box::new(key) as _);
if sec_copy.is_some() {
return Ok(sec_copy);
}
Ok(self.pub_key.clone().map(|key| Box::new(key) as _))
}
}
fn sec_key_algorithm(sec_key: &SecKey) -> Result<KeyAlgorithm> {
let attributes = sec_key.attributes();
if attributes
.find(unsafe { kSecAttrTokenID }.to_void())
.is_some()
{
// The only possible kSecAttrtokenID is kSecAttrTokenIDSecureEnclave.
//
// SecureEnclave keys do not have kSecAttrKeyType populated, but we can
// assume they are Ecc.
return Ok(KeyAlgorithm::Ecc);
}
let key_ty = sec_key
.attributes()
.find(unsafe { kSecAttrKeyType }.to_void())
.and_then(|key_type| match *key_type as *const _ {
ty if ty == unsafe { kSecAttrKeyTypeRSA } => Some(KeyAlgorithm::Rsa),
ty if ty == unsafe { kSecAttrKeyTypeEC } => Some(KeyAlgorithm::Ecc),
_ => None,
})
.ok_or("no key type")?;
Ok(key_ty)
}
#[derive(Debug, Clone)]
pub struct YubikeyPivPublicKey {
pub sec_key: SecKey,
pub label: String,
der: Vec<u8>,
public_key_hash: Vec<u8>,
algorithm: KeyAlgorithm,
}
impl YubikeyPivPublicKey {
#[instrument]
pub fn new(sec_key: SecKey, label: impl Into<String> + Debug) -> Result<Self> {
let der = sec_key
.external_representation()
.ok_or("no external representation")?;
let key_ty = sec_key_algorithm(&sec_key)?;
Ok(Self {
public_key_hash: sec_key.application_label().ok_or("no application_label")?,
sec_key,
label: label.into(),
der: der.to_vec(),
algorithm: key_ty,
})
}
}
impl PublicKey for YubikeyPivPublicKey {
#[instrument]
fn public_key_hash(&self) -> Vec<u8> {
self.public_key_hash.clone()
}
#[instrument]
fn label(&self) -> String {
self.label.clone()
}
#[instrument]
fn to_der(&self) -> Vec<u8> {
self.der.clone()
}
#[instrument]
fn verify(
&self,
algorithm: &native_pkcs11_traits::SignatureAlgorithm,
data: &[u8],
signature: &[u8],
) -> native_pkcs11_traits::Result<()> {
let algorithm = sigalg_to_seckeyalg(algorithm)?;
let result = self.sec_key.verify_signature(algorithm, data, signature)?;
if !result {
return Err("verify failed")?;
}
Ok(())
}
fn delete(self: Box<Self>) {
let _ = self.sec_key.delete();
}
fn algorithm(&self) -> KeyAlgorithm {
self.algorithm
}
}
#[instrument(skip(location))]
pub fn generate_key(
algorithm: Algorithm,
label: &str,
location: Option<Location>,
) -> Result<SecKey> {
let (ty, size) = match algorithm {
Algorithm::RSA => (KeyType::rsa(), 2048),
Algorithm::ECC => (KeyType::ec(), 256),
};
let opts = GenerateKeyOptions {
key_type: Some(ty),
size_in_bits: Some(size),
label: Some(label.into()),
token: Some(security_framework::key::Token::Software),
location,
access_control: None,
}
.to_dictionary();
Ok(SecKey::generate(opts).map_err(|e| e.to_string())?)
}
pub fn find_key(class: KeyClass, label: &str) -> Result<SecKey> {
let results = crate::keychain::item_search_options()?
.load_refs(true)
.label(label)
.class(ItemClass::key())
.key_class(class)
.limit(1)
.search();
let loaded_key = match results?.into_iter().next().ok_or("key not found")? {
security_framework::item::SearchResult::Ref(Reference::Key(key)) => key,
_ => return Err("no key ref")?,
};
Ok(loaded_key)
}
#[instrument]
pub fn find_key2(class: KeyClass, label: &[u8]) -> Result<Option<SecKey>> {
let results = crate::keychain::item_search_options()?
.load_refs(true)
.class(ItemClass::key())
.key_class(class)
.application_label(label)
.limit(1)
.search();
let results = match results {
Err(e) if e.code() == -25300 => return Ok(None),
Err(e) => return Err(e)?,
Ok(results) => results,
};
let loaded_key = results
.into_iter()
.next()
.map(|key| match key {
security_framework::item::SearchResult::Ref(Reference::Key(key)) => Ok::<_, &str>(key),
_ => Err("no key ref")?,
})
.transpose()?;
Ok(loaded_key)
}
#[instrument]
pub fn find_all_keys(key_class: KeyClass) -> Result<Vec<SecKey>> {
let results = crate::keychain::item_search_options()?
.load_refs(true)
.class(ItemClass::key())
.key_class(key_class)
.limit(Limit::All)
.search();
let results = match results {
Err(e) if e.code() == -25300 => return Ok(vec![]),
Err(e) => return Err(e)?,
Ok(results) => results,
};
let keys = results
.into_iter()
.filter_map(|res| match res {
security_framework::item::SearchResult::Ref(Reference::Key(key)) => Some(key),
_ => None,
})
.collect();
Ok(keys)
}
#[cfg(test)]
mod test {
use core_foundation::base::{TCFType, ToVoid};
use native_pkcs11_traits::{random_label, Backend};
use security_framework::item::{add_item, AddRef, ItemAddOptions, Limit};
use security_framework_sys::item::{kSecAttrLabel, kSecValueRef};
use serial_test::serial;
use super::*;
use crate::{keychain, KeychainBackend};
#[test]
#[serial]
fn key_label() -> crate::Result<()> {
let label = random_label();
let key = generate_key(Algorithm::RSA, &label, Some(keychain::location()?))?;
let mut found = false;
for res in crate::keychain::item_search_options()?
.key_class(KeyClass::private())
.limit(Limit::Max(1))
.load_attributes(true)
.load_refs(true)
.label(&label)
.search()?
{
found = true;
let (found_key, found_label) = match res {
security_framework::item::SearchResult::Ref(_) => panic!(),
security_framework::item::SearchResult::Dict(d) => {
let key = unsafe {
SecKey::wrap_under_get_rule(d.get(kSecValueRef.to_void()).cast_mut().cast())
};
let label = unsafe {
core_foundation::string::CFString::wrap_under_get_rule(
d.get(kSecAttrLabel.to_void()).cast_mut().cast(),
)
};
(key, label.to_string())
}
security_framework::item::SearchResult::Data(_) => panic!(),
security_framework::item::SearchResult::Other => panic!(),
};
assert_eq!(
found_key.external_representation().unwrap().to_vec(),
key.external_representation().unwrap().to_vec()
);
assert_eq!(found_label, label);
}
key.public_key().unwrap().delete()?;
key.delete()?;
assert!(found);
Ok(())
}
#[test]
#[serial]
fn key_lifecycle() -> Result<()> {
for (key_alg, sig_alg) in [
(
Algorithm::ECC,
security_framework_sys::key::Algorithm::ECDSASignatureDigestX962,
),
(
Algorithm::RSA,
security_framework_sys::key::Algorithm::RSASignatureDigestPKCS1v15Raw,
),
] {
let label = &random_label();
let key = generate_key(key_alg, label, Some(keychain::location()?))?;
let first_pubkey = key
.public_key()
.ok_or("no pubkey")?
.external_representation()
.ok_or("no external_representation")?
.to_vec();
std::mem::drop(key);
let loaded_key = find_key(KeyClass::private(), label)?;
let payload = vec![0u8; 32];
let signature = loaded_key.create_signature(sig_alg, &payload)?;
let loaded_pubkey = loaded_key.public_key().ok_or("no pubkey")?;
let sig_valid = loaded_pubkey.verify_signature(sig_alg, &payload, &signature)?;
assert!(sig_valid);
assert_eq!(
loaded_pubkey.external_representation().unwrap().to_vec(),
first_pubkey
);
loaded_key.public_key().ok_or("no pubkey")?.delete()?;
loaded_key.delete()?;
}
Ok(())
}
#[test]
#[ignore]
fn stress_test_keygen() {
let try_gen_key = || -> bool {
let label = random_label();
match generate_key(Algorithm::RSA, &label, Some(keychain::location().unwrap())) {
Ok(key) => {
let _ = key.delete();
true
}
Err(e) => {
eprintln!("{:?}", e);
false
}
}
};
let mut handles = vec![];
for _ in 0..20 {
handles.push(std::thread::spawn(try_gen_key));
}
assert!(
handles
.into_iter()
.map(|h| h.join().unwrap())
// fold so we don't early exit other threads
.all(|b| b)
);
}
#[test]
#[ignore = "https://github.com/google/native-pkcs11/issues/302"]
fn keychain_pubkey_hash_find() -> Result<()> {
let key1 = generate_key(Algorithm::ECC, &random_label(), Some(keychain::location()?))?;
let key2 = generate_key(Algorithm::ECC, &random_label(), Some(keychain::location()?))?;
assert_ne!(key1.application_label(), key2.application_label());
for keyclass in [KeyClass::public(), KeyClass::private()] {
for key in [&key1, &key2] {
assert_eq!(
find_key2(keyclass, &key.application_label().unwrap())?
.unwrap()
.application_label()
.unwrap(),
key.application_label().unwrap()
);
}
}
for key in [&key1, &key2] {
key.public_key().as_ref().map(SecKey::delete);
let _ = key.delete();
}
Ok(())
}
#[test]
#[ignore = "demonstrate bug"]
fn unpersisted_public_key() -> Result<()> {
// NOTE(kcking):
// 1) Manually-imported keys are super scuffed.
// Manually imported key can be searched by label (if imported with
// that label), but cannot be searched by application_label (aka public
// key hash). Perhaps we are supposed to set this value at import time.
//
// 2) Manually-imported private keys do not return a corresponding
// public key from SecKeyCopyPublicKey (`.public_key()` in rust).
let label = random_label();
let key1 = SecKey::generate(
GenerateKeyOptions::default()
.set_key_type(KeyType::ec())
.set_label(&label)
.to_dictionary(),
)?;
let pubkey_hash = key1.public_key().unwrap().application_label().unwrap();
add_item(
ItemAddOptions::new(security_framework::item::ItemAddValue::Ref(AddRef::Key(
key1,
)))
.set_label(&label)
.to_dictionary(),
)?;
// NOTE(kcking): this fails to find the generated key, most likely
// because application_label is not automatically populated by
// SecurityFramework when importing a SecKey
//
// let found_key =
// KeychainBackend::find_private_key(native_pkcs11_traits::KeySearchOptions::PublicKeyHash(
// pubkey_hash
// .as_slice()
// .try_into()
// .map_err(|_| "into array")?,
// ))
// .map_err(|e| {
// dbg!(e);
// "find"
// })?
// .unwrap();
let found_key = KeychainBackend
.find_private_key(native_pkcs11_traits::KeySearchOptions::Label(label))
.map_err(|e| {
dbg!(e);
"find"
})?
.unwrap();
assert_eq!(pubkey_hash, found_key.public_key_hash());
Ok(())
}
}

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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use security_framework::{
item::{ItemSearchOptions, Location},
os::macos::{item::ItemSearchOptionsExt, keychain::SecKeychain},
};
use crate::Result;
fn keychain() -> Result<Option<SecKeychain>> {
match std::env::var("NATIVE_PKCS11_KEYCHAIN_PATH") {
Ok(path) => Ok(Some(SecKeychain::open(path)?)),
Err(_) => Ok(None),
}
}
pub(crate) fn keychain_or_default() -> Result<SecKeychain> {
match keychain()? {
Some(keychain) => Ok(keychain),
None => Ok(SecKeychain::default()?),
}
}
pub(crate) fn location() -> Result<Location> {
match keychain()? {
Some(keychain) => Ok(Location::FileKeychain(keychain)),
None => Ok(Location::DefaultFileKeychain),
}
}
pub fn item_search_options() -> Result<ItemSearchOptions> {
let mut opts = ItemSearchOptions::new();
if let Some(keychain) = keychain()? {
opts.keychains(&[keychain]);
}
Ok(opts)
}

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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use std::fmt::Debug;
pub use backend::YubikeyPivBackend;
use core_foundation::error::CFError;
use native_pkcs11_traits::SignatureAlgorithm;
use thiserror::Error;
use tracing_error::SpanTrace;
mod backend;
pub mod certificate;
pub mod key;
pub mod keychain;
pub type Result<T> = std::result::Result<T, Error>;
pub struct Error {
error: ErrorKind,
context: SpanTrace,
}
impl Debug for Error {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
writeln!(f, "{:?}", self.error)?;
self.context.fmt(f)
}
}
impl std::error::Error for Error {}
impl<E: Into<ErrorKind>> From<E> for Error {
fn from(e: E) -> Self {
Error {
error: e.into(),
context: SpanTrace::capture(),
}
}
}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
writeln!(f, "{}", self.error)?;
std::fmt::Display::fmt(&self.context, f)
}
}
#[derive(Error, Debug)]
pub enum ErrorKind {
#[error("GenericError {0}")]
Generic(String),
#[error("{0}")]
Der(#[from] x509_cert::der::Error),
#[error("{0}")]
SecurityFramework(#[from] security_framework::base::Error),
#[error("{0}")]
Spki(#[from] x509_cert::spki::Error),
#[error("{0}")]
P256(#[from] p256::elliptic_curve::Error),
#[error("{0}")]
Pkcs1(#[from] rsa::pkcs1::Error),
#[error("{0:?}")]
UnsupportedSignatureAlgorithm(SignatureAlgorithm),
}
impl From<CFError> for ErrorKind {
fn from(e: CFError) -> Self {
ErrorKind::SecurityFramework(security_framework::base::Error::from_code(e.code() as i32))
}
}
impl From<&str> for ErrorKind {
fn from(s: &str) -> Self {
ErrorKind::Generic(s.to_string())
}
}
impl From<String> for ErrorKind {
fn from(s: String) -> Self {
ErrorKind::Generic(s)
}
}

26
native-pkcs11-piv/test-codesigned.sh Executable file
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@@ -0,0 +1,26 @@
#!/bin/bash
# Copyright 2022 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
set -e
# https://stackoverflow.com/questions/59895/how-do-i-get-the-directory-where-a-bash-script-is-located-from-within-the-script
cd $(dirname -- "$( readlink -f -- "$0"; )")
cargo build --bin signedtest
./codesigning-testing/codesign.sh $PWD/../target/debug/signedtest
(../target/debug/signedtest && echo SUCCESS) || (echo FAIL && exit 1)