// Copyright 2018 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.

syntax = "proto3";

package google.iam.credentials.v1;

import "google/api/annotations.proto";
import "google/iam/credentials/v1/common.proto";

option cc_enable_arenas = true;
option go_package = "google.golang.org/genproto/googleapis/iam/credentials/v1;credentials";
option java_multiple_files = true;
option java_outer_classname = "IAMCredentialsProto";
option java_package = "com.google.cloud.iam.credentials.v1";

// A service account is a special type of Google account that belongs to your
// application or a virtual machine (VM), instead of to an individual end user.
// Your application assumes the identity of the service account to call Google
// APIs, so that the users aren't directly involved.
//
// Service account credentials are used to temporarily assume the identity
// of the service account. Supported credential types include OAuth 2.0 access
// tokens, OpenID Connect ID tokens, self-signed JSON Web Tokens (JWTs), and
// more.
service IAMCredentials {
  // Generates an OAuth 2.0 access token for a service account.
  rpc GenerateAccessToken(GenerateAccessTokenRequest)
      returns (GenerateAccessTokenResponse) {
    option (google.api.http) = {
      post: "/v1/{name=projects/*/serviceAccounts/*}:generateAccessToken"
      body: "*"
    };
  }

  // Generates an OpenID Connect ID token for a service account.
  rpc GenerateIdToken(GenerateIdTokenRequest)
      returns (GenerateIdTokenResponse) {
    option (google.api.http) = {
      post: "/v1/{name=projects/*/serviceAccounts/*}:generateIdToken"
      body: "*"
    };
  }

  // Signs a blob using a service account's system-managed private key.
  rpc SignBlob(SignBlobRequest) returns (SignBlobResponse) {
    option (google.api.http) = {
      post: "/v1/{name=projects/*/serviceAccounts/*}:signBlob"
      body: "*"
    };
  }

  // Signs a JWT using a service account's system-managed private key.
  rpc SignJwt(SignJwtRequest) returns (SignJwtResponse) {
    option (google.api.http) = {
      post: "/v1/{name=projects/*/serviceAccounts/*}:signJwt"
      body: "*"
    };
  }

  // Exchange a JWT signed by third party identity provider to an OAuth 2.0
  // access token
  rpc GenerateIdentityBindingAccessToken(
      GenerateIdentityBindingAccessTokenRequest)
      returns (GenerateIdentityBindingAccessTokenResponse) {
    option (google.api.http) = {
      post: "/v1/{name=projects/*/serviceAccounts/*}:generateIdentityBindingAccessToken"
      body: "*"
    };
  }
}
