Create authorizations and key_generations test modules -

   - authorizations: helper struct to create set of key authorizations
   - key_generations: helper methods to generate various keys.

Test: N/A
Change-Id: I23250838b7b6d8ad59f5ef8682861a07e856299f
diff --git a/keystore2/test_utils/authorizations.rs b/keystore2/test_utils/authorizations.rs
new file mode 100644
index 0000000..4fbe124
--- /dev/null
+++ b/keystore2/test_utils/authorizations.rs
@@ -0,0 +1,88 @@
+// Copyright 2022, The Android Open Source Project
+//
+// 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.
+
+//! This module implements test utils to create Autherizations.
+
+use std::ops::Deref;
+
+use android_hardware_security_keymint::aidl::android::hardware::security::keymint::{
+    Algorithm::Algorithm, Digest::Digest, EcCurve::EcCurve, KeyParameter::KeyParameter,
+    KeyParameterValue::KeyParameterValue, KeyPurpose::KeyPurpose, Tag::Tag,
+};
+
+/// Helper struct to create set of Authorizations.
+pub struct AuthSetBuilder(Vec<KeyParameter>);
+
+impl Default for AuthSetBuilder {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl AuthSetBuilder {
+    /// Creates new Authorizations list.
+    pub fn new() -> Self {
+        Self(Vec::new())
+    }
+
+    /// Add Purpose.
+    pub fn purpose(mut self, p: KeyPurpose) -> Self {
+        self.0.push(KeyParameter { tag: Tag::PURPOSE, value: KeyParameterValue::KeyPurpose(p) });
+        self
+    }
+
+    /// Add Digest.
+    pub fn digest(mut self, d: Digest) -> Self {
+        self.0.push(KeyParameter { tag: Tag::DIGEST, value: KeyParameterValue::Digest(d) });
+        self
+    }
+
+    /// Add Algorithm.
+    pub fn algorithm(mut self, a: Algorithm) -> Self {
+        self.0.push(KeyParameter { tag: Tag::ALGORITHM, value: KeyParameterValue::Algorithm(a) });
+        self
+    }
+
+    /// Add EC-Curve.
+    pub fn ec_curve(mut self, e: EcCurve) -> Self {
+        self.0.push(KeyParameter { tag: Tag::EC_CURVE, value: KeyParameterValue::EcCurve(e) });
+        self
+    }
+
+    /// Add Attestation-Challenge.
+    pub fn attestation_challenge(mut self, b: Vec<u8>) -> Self {
+        self.0.push(KeyParameter {
+            tag: Tag::ATTESTATION_CHALLENGE,
+            value: KeyParameterValue::Blob(b),
+        });
+        self
+    }
+
+    /// Add Attestation-ID.
+    pub fn attestation_app_id(mut self, b: Vec<u8>) -> Self {
+        self.0.push(KeyParameter {
+            tag: Tag::ATTESTATION_APPLICATION_ID,
+            value: KeyParameterValue::Blob(b),
+        });
+        self
+    }
+}
+
+impl Deref for AuthSetBuilder {
+    type Target = Vec<KeyParameter>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}