Add main auth scheme interfaces

core/http-auth-spi/pom.xml

@@ -54,6 +54,11 @@
             <artifactId>reactive-streams</artifactId>
             <version>${reactive-streams.version}</version>
         </dependency>
+        <dependency>
+            <groupId>software.amazon.awssdk</groupId>
+            <artifactId>identity-spi</artifactId>
+            <version>${awsjavasdk.version}</version>
+        </dependency>
 
         <dependency>
             <groupId>org.junit.jupiter</groupId>

core/http-auth-spi/src/main/java/software/amazon/awssdk/http/auth/spi/HttpAuthOption.java

@@ -0,0 +1,88 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ * or in the "license" file accompanying this file. This file 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.
+ */
+
+package software.amazon.awssdk.http.auth.spi;
+
+import java.util.function.BiConsumer;
+import software.amazon.awssdk.annotations.SdkProtectedApi;
+import software.amazon.awssdk.http.auth.spi.internal.DefaultHttpAuthOption;
+import software.amazon.awssdk.identity.spi.IdentityProperty;
+import software.amazon.awssdk.utils.builder.SdkBuilder;
+
+/**
+ * An authentication scheme option, composed of the scheme ID and properties for use when resolving the identity and signing
+ * the request.
+ *
+ * This is used in the output from the auth scheme resolver. The resolver returns a list of these, in the order the auth scheme
+ * resolver wishes to use them.
+ *
+ * @see HttpAuthScheme
+ */
+@SdkProtectedApi
+public interface HttpAuthOption {
+
+    /**
+     * Get a new builder for creating a {@link HttpAuthOption}.
+     */
+    static Builder builder(String schemeId) {
+        return new DefaultHttpAuthOption.BuilderImpl(schemeId);
+    }
+
+    /**
+     * Retrieve the scheme ID, a unique identifier for the authentication scheme (aws.auth#sigv4, smithy.api#httpBearerAuth).
+     */
+    String schemeId();
+
+    /**
+     * Retrieve the value of an {@link IdentityProperty}.
+     */
+    <T> T identityProperty(IdentityProperty<T> property);
+
+    /**
+     * Retrieve the value of an {@link SignerProperty}.
+     */
+    <T> T signerProperty(SignerProperty<T> property);
+
+    /**
+     * A method to operate on all {@link IdentityProperty} values of this HttpAuthOption.
+     */
+    void forEachIdentityProperty(IdentityPropertyConsumer consumer);
+
+    /**
+     * A method to operate on all {@link SignerProperty} values of this HttpAuthOption.
+     */
+    <T> void forEachSignerProperty(SignerPropertyConsumer consumer);
+
+    /**
+     * Interface for operating on an {@link IdentityProperty} value.
+     */
+    @FunctionalInterface
+    interface IdentityPropertyConsumer<T> extends BiConsumer<IdentityProperty<T>, T> {
+    }
+
+    /**
+     * Interface for operating on an {@link SignerProperty} value.
+     */
+    @FunctionalInterface
+    interface SignerPropertyConsumer {
+        <T> void accept(SignerProperty<T> propertyKey, T propertyValue);
+    }
+
+    interface Builder extends SdkBuilder<Builder, HttpAuthOption> {
+        <T> Builder putIdentityProperty(IdentityProperty<T> key, T value);
+
+        <T> Builder putSignerProperty(SignerProperty<T> key, T value);
+    }
+}

core/http-auth-spi/src/main/java/software/amazon/awssdk/http/auth/spi/HttpAuthScheme.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ * or in the "license" file accompanying this file. This file 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.
+ */
+
+package software.amazon.awssdk.http.auth.spi;
+
+import software.amazon.awssdk.annotations.SdkPublicApi;
+import software.amazon.awssdk.identity.spi.AwsCredentialsIdentity;
+import software.amazon.awssdk.identity.spi.Identity;
+import software.amazon.awssdk.identity.spi.IdentityProvider;
+import software.amazon.awssdk.identity.spi.TokenIdentity;
+
+/**
+ * An authentication scheme, composed of:
+ * <ol>
+ *     <li>A scheme ID - A unique identifier for the authentication scheme.</li>
+ *     <li>An identity provider - An API that can be queried to acquire the customer's identity.</li>
+ *     <li>A signer - An API that can be used to sign HTTP requests.</li>
+ * </ol>
+ *
+ * @see IdentityProvider
+ * @see HttpSigner
+ *
+ * @param <T> The type of the {@link Identity} used by this authentication scheme.
+ */
+@SdkPublicApi
+public interface HttpAuthScheme<T extends Identity> {
+
+    /**
+     * Retrieve the scheme ID, a unique identifier for the authentication scheme (aws.auth#sigv4, smithy.api#httpBearerAuth).
+     */
+    String schemeId();
+
+    /**
+     * Retrieve the identity provider associated with this authentication scheme. The identity generated by this provider is
+     * guaranteed to be supported by the signer in this authentication scheme.
+     * <p>
+     * For example, if the scheme ID is aws.auth#sigv4, the provider returns an {@link AwsCredentialsIdentity}, if the scheme
+     * ID is httpBearerAuth, the provider returns a {@link TokenIdentity}.
+     * <p>
+     * Note, the returned identity provider may differ from the type of identity provider retrieved from the provided identity
+     * provider configuration.
+     */
+    IdentityProvider<T> identityProvider(IdentityProviderConfiguration resolvers);
+
+    /**
+     * Retrieve the signer associated with this authentication scheme. This signer is guaranteed to support the identity
+     * generated by the identity provider in this authentication scheme.
+     */
+    HttpSigner signer();
+}

core/http-auth-spi/src/main/java/software/amazon/awssdk/http/auth/spi/IdentityProviderConfiguration.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ * or in the "license" file accompanying this file. This file 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.
+ */
+
+package software.amazon.awssdk.http.auth.spi;
+
+import software.amazon.awssdk.annotations.SdkPublicApi;
+import software.amazon.awssdk.identity.spi.Identity;
+import software.amazon.awssdk.identity.spi.IdentityProvider;
+
+/**
+ * The identity providers configured in the SDK.
+ * <p>
+ * Used by the {@link HttpAuthScheme} implementation to load any @{@link IdentityProvider}s it needs from the set that are
+ * configured on the SDK.
+ */
+@SdkPublicApi
+@FunctionalInterface
+public interface IdentityProviderConfiguration {
+
+    /**
+     * Retrieve an identity provider for the provided identity type.
+     */
+    <T extends Identity> IdentityProvider<T> identityProvider(Class<T> identityType);
+}

core/http-auth-spi/src/main/java/software/amazon/awssdk/http/auth/spi/internal/DefaultHttpAuthOption.java

@@ -0,0 +1,102 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ * or in the "license" file accompanying this file. This file 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.
+ */
+
+package software.amazon.awssdk.http.auth.spi.internal;
+
+import java.util.HashMap;
+import java.util.Map;
+import software.amazon.awssdk.annotations.SdkInternalApi;
+import software.amazon.awssdk.http.auth.spi.HttpAuthOption;
+import software.amazon.awssdk.http.auth.spi.SignerProperty;
+import software.amazon.awssdk.identity.spi.IdentityProperty;
+import software.amazon.awssdk.utils.ToString;
+
+@SdkInternalApi
+public final class DefaultHttpAuthOption implements HttpAuthOption {
+
+    private final String schemeId;
+    private final Map<IdentityProperty<?>, Object> identityProperties;
+    private final Map<SignerProperty<?>, Object> signerProperties;
+
+    DefaultHttpAuthOption(BuilderImpl builder) {
+        this.schemeId = builder.schemeId;
+        this.identityProperties = new HashMap<>(builder.identityProperties);
+        this.signerProperties = new HashMap<>(builder.signerProperties);
+    }
+
+    @Override
+    public String schemeId() {
+        return schemeId;
+    }
+
+    @Override
+    public <T> T identityProperty(IdentityProperty<T> property) {
+        return (T) identityProperties.get(property);
+    }
+
+    @Override
+    public <T> T signerProperty(SignerProperty<T> property) {
+        return (T) signerProperties.get(property);
+    }
+
+    @Override
+    public void forEachIdentityProperty(IdentityPropertyConsumer consumer) {
+        identityProperties.forEach(consumer);
+    }
+
+    @Override
+    public <T> void forEachSignerProperty(SignerPropertyConsumer consumer) {
+        for (SignerProperty<?> p : signerProperties.keySet()) {
+            SignerProperty<T> property = (SignerProperty<T>) p;
+            consumer.accept(property, this.signerProperty(property));
+        }
+    }
+
+    @Override
+    public String toString() {
+        return ToString.builder("HttpAuthOption")
+                       .add("identityProperties", identityProperties)
+                       .add("signerProperties", signerProperties)
+                       .build();
+    }
+
+
+    public static final class BuilderImpl implements Builder {
+        private final String schemeId;
+        private final Map<IdentityProperty<?>, Object> identityProperties = new HashMap<>();
+        private final Map<SignerProperty<?>, Object> signerProperties = new HashMap<>();
+
+        public BuilderImpl(String schemeId) {
+            this.schemeId = schemeId;
+        }
+
+        @Override
+        public <T> Builder putIdentityProperty(IdentityProperty<T> key, T value) {
+            this.identityProperties.put(key, value);
+            return this;
+        }
+
+        @Override
+        public <T> Builder putSignerProperty(SignerProperty<T> key, T value) {
+            this.signerProperties.put(key, value);
+            return this;
+        }
+
+        @Override
+        public HttpAuthOption build() {
+            return new DefaultHttpAuthOption(this);
+        }
+    }
+}