Merge "Clarify documentation for the dimming stage." into tm-dev
diff --git a/security/keymint/aidl/android/hardware/security/keymint/KeyCreationResult.aidl b/security/keymint/aidl/android/hardware/security/keymint/KeyCreationResult.aidl
index a4cfb8b..57285a3 100644
--- a/security/keymint/aidl/android/hardware/security/keymint/KeyCreationResult.aidl
+++ b/security/keymint/aidl/android/hardware/security/keymint/KeyCreationResult.aidl
@@ -61,13 +61,15 @@
* the non-attestation case, whether the key can self-sign.
*
* 1. Asymmetric key attestation with factory key. If Tag::ATTESTATION_CHALLENGE is provided
- * and the `attestationKey` parameter on the generate/import call is null, the returned
+ * and the `attestationKey` parameter on the generate/import call is null, and if the
+ * KeyMint implementation supports factory-provisioned attestation keys, the returned
* certificate chain must contain an attestation certificate signed with a factory-
* provisioned attestation key, and the full certificate chain for that factory-provisioned
* attestation key. Tag::ATTESTATION_APPLICATION_ID must also be provided when the
* ATTESTATION_CHALLENGE is provided, otherwise ATTESTATION_APPLICATION_ID_MISSING will be
* returned. KeyMint implementations are not required to support factory-provisioned
- * attestation keys.
+ * attestation keys. If the KeyMint implementation does not support factory-provisioned
+ * keys, it must return ATTESTATION_KEYS_NOT_PROVISIONED.
*
* 2. Asymmetric key attestation with caller-provided key. If Tag::ATTESTATION_CHALLENGE is
* provided and the `attestationKey` parameter on the generate/import call is non-null and
diff --git a/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.cpp b/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.cpp
index 4ab989b..f9510d3 100644
--- a/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.cpp
+++ b/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.cpp
@@ -312,6 +312,30 @@
return GenerateKey(key_desc, attest_key, &key_blob_, &key_characteristics_, &cert_chain_);
}
+ErrorCode KeyMintAidlTestBase::GenerateKeyWithSelfSignedAttestKey(
+ const AuthorizationSet& attest_key_desc, const AuthorizationSet& key_desc,
+ vector<uint8_t>* key_blob, vector<KeyCharacteristics>* key_characteristics,
+ vector<Certificate>* cert_chain) {
+ AttestationKey attest_key;
+ vector<Certificate> attest_cert_chain;
+ vector<KeyCharacteristics> attest_key_characteristics;
+ // Generate a key with self signed attestation.
+ auto error = GenerateKey(attest_key_desc, std::nullopt, &attest_key.keyBlob,
+ &attest_key_characteristics, &attest_cert_chain);
+ if (error != ErrorCode::OK) {
+ return error;
+ }
+
+ attest_key.issuerSubjectName = make_name_from_str("Android Keystore Key");
+ // Generate a key, by passing the above self signed attestation key as attest key.
+ error = GenerateKey(key_desc, attest_key, key_blob, key_characteristics, cert_chain);
+ if (error == ErrorCode::OK) {
+ // Append the attest_cert_chain to the attested cert_chain to yield a valid cert chain.
+ cert_chain->push_back(attest_cert_chain[0]);
+ }
+ return error;
+}
+
ErrorCode KeyMintAidlTestBase::ImportKey(const AuthorizationSet& key_desc, KeyFormat format,
const string& key_material, vector<uint8_t>* key_blob,
vector<KeyCharacteristics>* key_characteristics) {
diff --git a/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.h b/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.h
index e59443c..602dcaf 100644
--- a/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.h
+++ b/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.h
@@ -96,6 +96,21 @@
ErrorCode GenerateKey(const AuthorizationSet& key_desc,
const optional<AttestationKey>& attest_key = std::nullopt);
+ // Generate key for implementations which do not support factory attestation.
+ ErrorCode GenerateKeyWithSelfSignedAttestKey(const AuthorizationSet& attest_key_desc,
+ const AuthorizationSet& key_desc,
+ vector<uint8_t>* key_blob,
+ vector<KeyCharacteristics>* key_characteristics,
+ vector<Certificate>* cert_chain);
+
+ ErrorCode GenerateKeyWithSelfSignedAttestKey(const AuthorizationSet& attest_key_desc,
+ const AuthorizationSet& key_desc,
+ vector<uint8_t>* key_blob,
+ vector<KeyCharacteristics>* key_characteristics) {
+ return GenerateKeyWithSelfSignedAttestKey(attest_key_desc, key_desc, key_blob,
+ key_characteristics, &cert_chain_);
+ }
+
ErrorCode ImportKey(const AuthorizationSet& key_desc, KeyFormat format,
const string& key_material, vector<uint8_t>* key_blob,
vector<KeyCharacteristics>* key_characteristics);
diff --git a/security/keymint/aidl/vts/functional/KeyMintTest.cpp b/security/keymint/aidl/vts/functional/KeyMintTest.cpp
index 8a24d25..3aa09fa 100644
--- a/security/keymint/aidl/vts/functional/KeyMintTest.cpp
+++ b/security/keymint/aidl/vts/functional/KeyMintTest.cpp
@@ -1067,22 +1067,30 @@
for (auto key_size : ValidKeySizes(Algorithm::RSA)) {
vector<uint8_t> key_blob;
vector<KeyCharacteristics> key_characteristics;
- auto result = GenerateKey(AuthorizationSetBuilder()
- .RsaSigningKey(key_size, 65537)
- .Digest(Digest::NONE)
- .Padding(PaddingMode::NONE)
- .AttestationChallenge(challenge)
- .AttestationApplicationId(app_id)
- .Authorization(TAG_NO_AUTH_REQUIRED)
- .Authorization(TAG_CERTIFICATE_SERIAL, serial_blob)
- .Authorization(TAG_CERTIFICATE_SUBJECT, subject_der)
- .SetDefaultValidity(),
- &key_blob, &key_characteristics);
+ auto builder = AuthorizationSetBuilder()
+ .RsaSigningKey(key_size, 65537)
+ .Digest(Digest::NONE)
+ .Padding(PaddingMode::NONE)
+ .AttestationChallenge(challenge)
+ .AttestationApplicationId(app_id)
+ .Authorization(TAG_NO_AUTH_REQUIRED)
+ .Authorization(TAG_CERTIFICATE_SERIAL, serial_blob)
+ .Authorization(TAG_CERTIFICATE_SUBJECT, subject_der)
+ .SetDefaultValidity();
+
+ auto result = GenerateKey(builder, &key_blob, &key_characteristics);
// Strongbox may not support factory provisioned attestation key.
if (SecLevel() == SecurityLevel::STRONGBOX) {
- if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) return;
+ if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) {
+ result = GenerateKeyWithSelfSignedAttestKey(
+ AuthorizationSetBuilder()
+ .RsaKey(key_size, 65537)
+ .AttestKey()
+ .SetDefaultValidity(), /* attest key params */
+ builder, &key_blob, &key_characteristics);
+ }
}
-
+ ASSERT_EQ(ErrorCode::OK, result);
ASSERT_GT(key_blob.size(), 0U);
CheckBaseParams(key_characteristics);
CheckCharacteristics(key_blob, key_characteristics);
@@ -1203,19 +1211,27 @@
vector<uint8_t> key_blob;
vector<KeyCharacteristics> key_characteristics;
- auto result = GenerateKey(AuthorizationSetBuilder()
- .RsaEncryptionKey(key_size, 65537)
- .Padding(PaddingMode::NONE)
- .AttestationChallenge(challenge)
- .AttestationApplicationId(app_id)
- .Authorization(TAG_NO_AUTH_REQUIRED)
- .Authorization(TAG_CERTIFICATE_SERIAL, serial_blob)
- .Authorization(TAG_CERTIFICATE_SUBJECT, subject_der)
- .SetDefaultValidity(),
- &key_blob, &key_characteristics);
+ auto builder = AuthorizationSetBuilder()
+ .RsaEncryptionKey(key_size, 65537)
+ .Padding(PaddingMode::NONE)
+ .AttestationChallenge(challenge)
+ .AttestationApplicationId(app_id)
+ .Authorization(TAG_NO_AUTH_REQUIRED)
+ .Authorization(TAG_CERTIFICATE_SERIAL, serial_blob)
+ .Authorization(TAG_CERTIFICATE_SUBJECT, subject_der)
+ .SetDefaultValidity();
+
+ auto result = GenerateKey(builder, &key_blob, &key_characteristics);
// Strongbox may not support factory provisioned attestation key.
if (SecLevel() == SecurityLevel::STRONGBOX) {
- if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) return;
+ if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) {
+ result = GenerateKeyWithSelfSignedAttestKey(
+ AuthorizationSetBuilder()
+ .RsaKey(key_size, 65537)
+ .AttestKey()
+ .SetDefaultValidity(), /* attest key params */
+ builder, &key_blob, &key_characteristics);
+ }
}
ASSERT_EQ(ErrorCode::OK, result);
@@ -1319,17 +1335,25 @@
vector<uint8_t> key_blob;
vector<KeyCharacteristics> key_characteristics;
- auto result = GenerateKey(AuthorizationSetBuilder()
- .RsaSigningKey(2048, 65537)
- .Digest(Digest::NONE)
- .Padding(PaddingMode::NONE)
- .AttestationChallenge(challenge)
- .Authorization(TAG_NO_AUTH_REQUIRED)
- .SetDefaultValidity(),
- &key_blob, &key_characteristics);
+ auto builder = AuthorizationSetBuilder()
+ .RsaSigningKey(2048, 65537)
+ .Digest(Digest::NONE)
+ .Padding(PaddingMode::NONE)
+ .AttestationChallenge(challenge)
+ .Authorization(TAG_NO_AUTH_REQUIRED)
+ .SetDefaultValidity();
+
+ auto result = GenerateKey(builder, &key_blob, &key_characteristics);
// Strongbox may not support factory provisioned attestation key.
if (SecLevel() == SecurityLevel::STRONGBOX) {
- if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) return;
+ if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) {
+ result = GenerateKeyWithSelfSignedAttestKey(
+ AuthorizationSetBuilder()
+ .RsaKey(2048, 65537)
+ .AttestKey()
+ .SetDefaultValidity(), /* attest key params */
+ builder, &key_blob, &key_characteristics);
+ }
}
ASSERT_EQ(ErrorCode::ATTESTATION_APPLICATION_ID_MISSING, result);
}
@@ -1441,21 +1465,29 @@
for (auto key_size : ValidKeySizes(Algorithm::RSA)) {
vector<uint8_t> key_blob;
vector<KeyCharacteristics> key_characteristics;
- auto result = GenerateKey(AuthorizationSetBuilder()
- .RsaSigningKey(key_size, 65537)
- .Digest(Digest::NONE)
- .Padding(PaddingMode::NONE)
- .AttestationChallenge(challenge)
- .AttestationApplicationId(app_id)
- .Authorization(TAG_NO_AUTH_REQUIRED)
- .Authorization(TAG_USAGE_COUNT_LIMIT, 1)
- .Authorization(TAG_CERTIFICATE_SERIAL, serial_blob)
- .Authorization(TAG_CERTIFICATE_SUBJECT, subject_der)
- .SetDefaultValidity(),
- &key_blob, &key_characteristics);
+ auto builder = AuthorizationSetBuilder()
+ .RsaSigningKey(key_size, 65537)
+ .Digest(Digest::NONE)
+ .Padding(PaddingMode::NONE)
+ .AttestationChallenge(challenge)
+ .AttestationApplicationId(app_id)
+ .Authorization(TAG_NO_AUTH_REQUIRED)
+ .Authorization(TAG_USAGE_COUNT_LIMIT, 1)
+ .Authorization(TAG_CERTIFICATE_SERIAL, serial_blob)
+ .Authorization(TAG_CERTIFICATE_SUBJECT, subject_der)
+ .SetDefaultValidity();
+
+ auto result = GenerateKey(builder, &key_blob, &key_characteristics);
// Strongbox may not support factory provisioned attestation key.
if (SecLevel() == SecurityLevel::STRONGBOX) {
- if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) return;
+ if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) {
+ result = GenerateKeyWithSelfSignedAttestKey(
+ AuthorizationSetBuilder()
+ .RsaKey(key_size, 65537)
+ .AttestKey()
+ .SetDefaultValidity(), /* attest key params */
+ builder, &key_blob, &key_characteristics);
+ }
}
ASSERT_EQ(ErrorCode::OK, result);
@@ -1676,19 +1708,27 @@
for (auto curve : ValidCurves()) {
vector<uint8_t> key_blob;
vector<KeyCharacteristics> key_characteristics;
- auto result = GenerateKey(AuthorizationSetBuilder()
- .Authorization(TAG_NO_AUTH_REQUIRED)
- .EcdsaSigningKey(curve)
- .Digest(Digest::NONE)
- .AttestationChallenge(challenge)
- .AttestationApplicationId(app_id)
- .Authorization(TAG_CERTIFICATE_SERIAL, serial_blob)
- .Authorization(TAG_CERTIFICATE_SUBJECT, subject_der)
- .SetDefaultValidity(),
- &key_blob, &key_characteristics);
+ auto builder = AuthorizationSetBuilder()
+ .Authorization(TAG_NO_AUTH_REQUIRED)
+ .EcdsaSigningKey(curve)
+ .Digest(Digest::NONE)
+ .AttestationChallenge(challenge)
+ .AttestationApplicationId(app_id)
+ .Authorization(TAG_CERTIFICATE_SERIAL, serial_blob)
+ .Authorization(TAG_CERTIFICATE_SUBJECT, subject_der)
+ .SetDefaultValidity();
+
+ auto result = GenerateKey(builder, &key_blob, &key_characteristics);
// Strongbox may not support factory provisioned attestation key.
if (SecLevel() == SecurityLevel::STRONGBOX) {
- if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) return;
+ if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) {
+ result = GenerateKeyWithSelfSignedAttestKey(
+ AuthorizationSetBuilder()
+ .EcdsaKey(curve)
+ .AttestKey()
+ .SetDefaultValidity(), /* attest key params */
+ builder, &key_blob, &key_characteristics);
+ }
}
ASSERT_EQ(ErrorCode::OK, result);
ASSERT_GT(key_blob.size(), 0U);
@@ -1826,7 +1866,14 @@
}
// Strongbox may not support factory provisioned attestation key.
if (SecLevel() == SecurityLevel::STRONGBOX) {
- if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) return;
+ if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) {
+ result = GenerateKeyWithSelfSignedAttestKey(
+ AuthorizationSetBuilder()
+ .EcdsaKey(EcCurve::P_256)
+ .AttestKey()
+ .SetDefaultValidity(), /* attest key params */
+ builder, &key_blob, &key_characteristics);
+ }
}
ASSERT_EQ(result, ErrorCode::OK);
ASSERT_GT(key_blob.size(), 0U);
@@ -1878,8 +1925,20 @@
.Authorization(TAG_CERTIFICATE_SUBJECT, subject_der)
.SetDefaultValidity();
builder.push_back(tag);
- ASSERT_EQ(ErrorCode::CANNOT_ATTEST_IDS,
- GenerateKey(builder, &key_blob, &key_characteristics));
+
+ auto error = GenerateKey(builder, &key_blob, &key_characteristics);
+ // Strongbox may not support factory provisioned attestation key.
+ if (SecLevel() == SecurityLevel::STRONGBOX) {
+ if (error == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) {
+ error = GenerateKeyWithSelfSignedAttestKey(
+ AuthorizationSetBuilder()
+ .EcdsaKey(EcCurve::P_256)
+ .AttestKey()
+ .SetDefaultValidity(), /* attest key params */
+ builder, &key_blob, &key_characteristics);
+ }
+ }
+ ASSERT_EQ(error, ErrorCode::CANNOT_ATTEST_IDS);
}
}
@@ -1984,8 +2043,18 @@
if (reset) {
builder.Authorization(TAG_RESET_SINCE_ID_ROTATION);
}
-
- ASSERT_EQ(ErrorCode::OK, GenerateKey(builder));
+ auto result = GenerateKey(builder);
+ if (SecLevel() == SecurityLevel::STRONGBOX) {
+ if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) {
+ result = GenerateKeyWithSelfSignedAttestKey(
+ AuthorizationSetBuilder()
+ .EcdsaKey(EcCurve::P_256)
+ .AttestKey()
+ .SetDefaultValidity(), /* attest key params */
+ builder, &key_blob_, &key_characteristics_, &cert_chain_);
+ }
+ }
+ ASSERT_EQ(ErrorCode::OK, result);
ASSERT_GT(key_blob_.size(), 0U);
EXPECT_TRUE(ChainSignaturesAreValid(cert_chain_));
@@ -2072,21 +2141,29 @@
// to confirm that this field never makes it into the attestation extension.
vector<uint8_t> key_blob;
vector<KeyCharacteristics> key_characteristics;
- auto result = GenerateKey(AuthorizationSetBuilder()
- .Authorization(TAG_NO_AUTH_REQUIRED)
- .EcdsaSigningKey(EcCurve::P_256)
- .Digest(Digest::NONE)
- .AttestationChallenge(challenge)
- .AttestationApplicationId(attest_app_id)
- .Authorization(TAG_APPLICATION_ID, "client_id")
- .Authorization(TAG_APPLICATION_DATA, "appdata")
- .Authorization(TAG_CERTIFICATE_SERIAL, serial_blob)
- .Authorization(TAG_CERTIFICATE_SUBJECT, subject_der)
- .SetDefaultValidity(),
- &key_blob, &key_characteristics);
+ auto builder = AuthorizationSetBuilder()
+ .Authorization(TAG_NO_AUTH_REQUIRED)
+ .EcdsaSigningKey(EcCurve::P_256)
+ .Digest(Digest::NONE)
+ .AttestationChallenge(challenge)
+ .AttestationApplicationId(attest_app_id)
+ .Authorization(TAG_APPLICATION_ID, "client_id")
+ .Authorization(TAG_APPLICATION_DATA, "appdata")
+ .Authorization(TAG_CERTIFICATE_SERIAL, serial_blob)
+ .Authorization(TAG_CERTIFICATE_SUBJECT, subject_der)
+ .SetDefaultValidity();
+
+ auto result = GenerateKey(builder, &key_blob, &key_characteristics);
// Strongbox may not support factory provisioned attestation key.
if (SecLevel() == SecurityLevel::STRONGBOX) {
- if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) return;
+ if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) {
+ result = GenerateKeyWithSelfSignedAttestKey(
+ AuthorizationSetBuilder()
+ .EcdsaKey(EcCurve::P_256)
+ .AttestKey()
+ .SetDefaultValidity(), /* attest key params */
+ builder, &key_blob, &key_characteristics);
+ }
}
ASSERT_EQ(result, ErrorCode::OK);
ASSERT_GT(key_blob.size(), 0U);
@@ -2166,16 +2243,23 @@
auto challenge = "hello";
vector<uint8_t> key_blob;
vector<KeyCharacteristics> key_characteristics;
+ auto builder = AuthorizationSetBuilder()
+ .EcdsaSigningKey(EcCurve::P_256)
+ .Digest(Digest::NONE)
+ .AttestationChallenge(challenge)
+ .SetDefaultValidity();
- auto result = GenerateKey(AuthorizationSetBuilder()
- .EcdsaSigningKey(EcCurve::P_256)
- .Digest(Digest::NONE)
- .AttestationChallenge(challenge)
- .SetDefaultValidity(),
- &key_blob, &key_characteristics);
+ auto result = GenerateKey(builder, &key_blob, &key_characteristics);
// Strongbox may not support factory provisioned attestation key.
if (SecLevel() == SecurityLevel::STRONGBOX) {
- if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) return;
+ if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) {
+ result = GenerateKeyWithSelfSignedAttestKey(
+ AuthorizationSetBuilder()
+ .EcdsaKey(EcCurve::P_256)
+ .AttestKey()
+ .SetDefaultValidity(), /* attest key params */
+ builder, &key_blob, &key_characteristics);
+ }
}
ASSERT_EQ(ErrorCode::ATTESTATION_APPLICATION_ID_MISSING, result);
}
@@ -2234,17 +2318,25 @@
const string app_id(length, 'a');
vector<uint8_t> key_blob;
vector<KeyCharacteristics> key_characteristics;
- auto result = GenerateKey(AuthorizationSetBuilder()
- .Authorization(TAG_NO_AUTH_REQUIRED)
- .EcdsaSigningKey(EcCurve::P_256)
- .Digest(Digest::NONE)
- .AttestationChallenge(challenge)
- .AttestationApplicationId(app_id)
- .SetDefaultValidity(),
- &key_blob, &key_characteristics);
+ auto builder = AuthorizationSetBuilder()
+ .Authorization(TAG_NO_AUTH_REQUIRED)
+ .EcdsaSigningKey(EcCurve::P_256)
+ .Digest(Digest::NONE)
+ .AttestationChallenge(challenge)
+ .AttestationApplicationId(app_id)
+ .SetDefaultValidity();
+
+ auto result = GenerateKey(builder, &key_blob, &key_characteristics);
// Strongbox may not support factory provisioned attestation key.
if (SecLevel() == SecurityLevel::STRONGBOX) {
- if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) return;
+ if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) {
+ result = GenerateKeyWithSelfSignedAttestKey(
+ AuthorizationSetBuilder()
+ .EcdsaKey(EcCurve::P_256)
+ .AttestKey()
+ .SetDefaultValidity(), /* attest key params */
+ builder, &key_blob, &key_characteristics);
+ }
}
ASSERT_EQ(ErrorCode::OK, result);
ASSERT_GT(key_blob.size(), 0U);
@@ -7427,15 +7519,26 @@
void GenerateKeyMintEcKey(EcCurve curve, EVP_PKEY_Ptr* kmPubKey) {
vector<uint8_t> challenge = {0x41, 0x42};
- ErrorCode result =
- GenerateKey(AuthorizationSetBuilder()
- .Authorization(TAG_NO_AUTH_REQUIRED)
- .Authorization(TAG_EC_CURVE, curve)
- .Authorization(TAG_PURPOSE, KeyPurpose::AGREE_KEY)
- .Authorization(TAG_ALGORITHM, Algorithm::EC)
- .Authorization(TAG_ATTESTATION_APPLICATION_ID, {0x61, 0x62})
- .Authorization(TAG_ATTESTATION_CHALLENGE, challenge)
- .SetDefaultValidity());
+ auto builder = AuthorizationSetBuilder()
+ .Authorization(TAG_NO_AUTH_REQUIRED)
+ .Authorization(TAG_EC_CURVE, curve)
+ .Authorization(TAG_PURPOSE, KeyPurpose::AGREE_KEY)
+ .Authorization(TAG_ALGORITHM, Algorithm::EC)
+ .Authorization(TAG_ATTESTATION_APPLICATION_ID, {0x61, 0x62})
+ .Authorization(TAG_ATTESTATION_CHALLENGE, challenge)
+ .SetDefaultValidity();
+ ErrorCode result = GenerateKey(builder);
+
+ if (SecLevel() == SecurityLevel::STRONGBOX) {
+ if (result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) {
+ result = GenerateKeyWithSelfSignedAttestKey(
+ AuthorizationSetBuilder()
+ .EcdsaKey(EcCurve::P_256)
+ .AttestKey()
+ .SetDefaultValidity(), /* attest key params */
+ builder, &key_blob_, &key_characteristics_, &cert_chain_);
+ }
+ }
ASSERT_EQ(ErrorCode::OK, result) << "Failed to generate key";
ASSERT_GT(cert_chain_.size(), 0);
X509_Ptr kmKeyCert(parse_cert_blob(cert_chain_[0].encodedCertificate));