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Code Issues Packages Projects Releases 1 Wiki Activity

Support device properties attestation for generating key

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This commit is contained in:
Wang Han
2024-07-25 22:54:35 +08:00
committed by 5ec1cff
parent db72d6d3e9
commit 3ea150212c
1 changed files with 37 additions and 5 deletions
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42
service/src/main/java/io/github/a13e300/tricky_store/keystore/CertHack.java
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@@ -90,6 +90,7 @@ public final class CertHack {
throw new RuntimeException(t);
}
}
private static final int ATTESTATION_PACKAGE_INFO_VERSION_INDEX = 1;
public static boolean canHack() {
@@ -137,7 +138,7 @@ public final class CertHack {
LinkedList<Certificate> certificateChain = new LinkedList<>();
for (int j = 0; j < numberOfCertificates; j++) {
Map<String,String> certData= xmlParser.obtainPath(
Map<String, String> certData = xmlParser.obtainPath(
"AndroidAttestation.Keybox.Key[" + i + "].CertificateChain.Certificate[" + j + "]");
certificateChain.add(parseCert(certData.get("text")));
}
@@ -186,7 +187,8 @@ public final class CertHack {
ContentSigner signer;
var k = keyboxes.get(leaf.getPublicKey().getAlgorithm());
if (k == null) throw new UnsupportedOperationException("unsupported algorithm " + leaf.getPublicKey().getAlgorithm());
if (k == null)
throw new UnsupportedOperationException("unsupported algorithm " + leaf.getPublicKey().getAlgorithm());
certificates = new LinkedList<>(k.certificates);
builder = new X509v3CertificateBuilder(
new X509CertificateHolder(
@@ -355,7 +357,6 @@ public final class CertHack {
var AosVersion = new ASN1Integer(UtilKt.getOsVersion());
var AosPatchLevel = new ASN1Integer(UtilKt.getPatchLevel());
// TODO hex3l: add applicationID to attestation
var AapplicationID = createApplicationId(uid);
var AbootPatchlevel = new ASN1Integer(UtilKt.getPatchLevelLong());
var AvendorPatchLevel = new ASN1Integer(UtilKt.getPatchLevelLong());
@@ -378,8 +379,29 @@ public final class CertHack {
var vendorPatchLevel = new DERTaggedObject(true, 718, AvendorPatchLevel);
var bootPatchLevel = new DERTaggedObject(true, 719, AbootPatchlevel);
ASN1Encodable[] teeEnforcedEncodables = {purpose, algorithm, keySize, digest, ecCurve,
noAuthRequired, origin, rootOfTrust, osVersion, osPatchLevel, vendorPatchLevel, bootPatchLevel};
ASN1Encodable[] teeEnforcedEncodables;
// Support device properties attestation
if (params.brand != null) {
var Abrand = new DEROctetString(params.brand);
var Adevice = new DEROctetString(params.device);
var Aproduct = new DEROctetString(params.product);
var Amanufacturer = new DEROctetString(params.manufacturer);
var Amodel = new DEROctetString(params.model);
var brand = new DERTaggedObject(true, 710, Abrand);
var device = new DERTaggedObject(true, 711, Adevice);
var product = new DERTaggedObject(true, 712, Aproduct);
var manufacturer = new DERTaggedObject(true, 716, Amanufacturer);
var model = new DERTaggedObject(true, 717, Amodel);
teeEnforcedEncodables = new ASN1Encodable[]{purpose, algorithm, keySize, digest, ecCurve,
noAuthRequired, origin, rootOfTrust, osVersion, osPatchLevel, vendorPatchLevel,
bootPatchLevel, brand, device, product, manufacturer, model};
} else {
teeEnforcedEncodables = new ASN1Encodable[]{purpose, algorithm, keySize, digest, ecCurve,
noAuthRequired, origin, rootOfTrust, osVersion, osPatchLevel, vendorPatchLevel,
bootPatchLevel};
}
ASN1Encodable[] softwareEnforced = {applicationID, creationDateTime};
@@ -482,6 +504,11 @@ public final class CertHack {
public List<Integer> digest = new ArrayList<>();
public byte[] attestationChallenge;
public byte[] brand;
public byte[] device;
public byte[] product;
public byte[] manufacturer;
public byte[] model;
public KeyGenParameters(KeyParameter[] params) {
for (var kp : params) {
@@ -508,6 +535,11 @@ public final class CertHack {
digest.add(p.getDigest());
}
case Tag.ATTESTATION_CHALLENGE -> attestationChallenge = p.getBlob();
case Tag.ATTESTATION_ID_BRAND -> brand = p.getBlob();
case Tag.ATTESTATION_ID_DEVICE -> device = p.getBlob();
case Tag.ATTESTATION_ID_PRODUCT -> product = p.getBlob();
case Tag.ATTESTATION_ID_MANUFACTURER -> manufacturer = p.getBlob();
case Tag.ATTESTATION_ID_MODEL -> model = p.getBlob();
}
}
}