Google cloud platform 对Google IAP使用Salesforce命名凭据 目标

我已经构建了一个RESTAPI，它运行在Google应用程序引擎上，受（身份感知代理）保护。我的目标是使用从Salesforce向该API发出请求（使用该功能）

上下文 多亏了a，我知道我需要使用此流来请求令牌。因此，下一步是了解如何填写Salesforce的定义：

a的特性如下所示：

证书：不适用于我的用例

标识类型：是为每个访问Salesforce的用户使用不同的凭据，还是使用单一凭据。我将使用命名的主体

身份验证协议：I表明需要JWT令牌交换

令牌端点Url:为服务帐户下载的JSON指定

https://oauth2.googleapis.com/token

范围：我不确定此属性的正确值，可能它应该是

openid email

发行人：不知道这应该是什么

命名主体：我认为这应该是服务帐户中的客户电子邮件值。但是，此文档中说“为IAP安全客户端ID请求OIDC令牌”。这是否意味着我应该使用IAP客户端ID中的客户端ID作为Web应用程序页面的替代

受众：我能找到的唯一合适的值是在GCP控制台的HTTPS资源部分中找到的IAP签名头JWT，格式为

/projects/NNNNN/apps/XXXXXXX

代币有效期：我想这应该是1小时

JWT签名证书：

生成授权标头：应启用

问题：

是否有人可以确认我的理解，并协助处理范围、颁发者和命名主体字段

会议讨论了需要JWT的额外索赔

目标受众

，结果如何

---

我认为，

目标受众

云应该是位于IAP仪表板上的iapClientId。就像刚才提到的

---

我认为，

目标受众

云应该是位于IAP仪表板上的iapClientId。就像刚才提到的

---

我写了一篇关于如何创建包括JWT字段的访问令牌的文章。我对Salescorce一无所知。一旦您拥有一个签名的JWT，您就可以将其交换为访问令牌和OIDC令牌。我在Salesforce表单中没有看到任何可以这样做的内容。仅仅签署JWT是不够的。谢谢@JohnHanley，我将阅读你的文章并编写一个客户代码，这样我至少可以了解Salesforce之外的流程。可用的选项包括OAuth 2.0、JWT和JWT令牌交换。如果您遇到困难，我可能会自愿帮助您。我非常了解GCP的这一领域。可能会成为我网站上一篇有趣的文章。通过我的网站与我联系。我写了一篇关于如何创建包括JWT字段的访问令牌的文章。我对Salescorce一无所知。一旦您拥有一个签名的JWT，您就可以将其交换为访问令牌和OIDC令牌。我在Salesforce表单中没有看到任何可以这样做的内容。仅仅签署JWT是不够的。谢谢@JohnHanley，我将阅读你的文章并编写一个客户代码，这样我至少可以了解Salesforce之外的流程。可用的选项包括OAuth 2.0、JWT和JWT令牌交换。如果您遇到困难，我可能会自愿帮助您。我非常了解GCP的这一领域。可能会成为我网站上一篇有趣的文章。通过我的网站与我联系。原来Salesforce不支持谷歌要求的特定代币交换。@AdamSherman文档中有吗？想知道你是如何发现它不受支持的吗？这是一段时间以前的@RyanDawson，但我无法使它工作，也找不到一个示例。事实上，Salesforce和Google的所有示例都是在Apex中手动完成的。你试过了吗？谢谢@AdamSherman，调查发现Salesforce不支持Google要求的特定代币交换。@AdamSherman文档中有吗？想知道你是如何发现它不受支持的吗？这是一段时间以前的@RyanDawson，但我无法使它工作，也找不到一个示例。事实上，Salesforce和Google的所有示例都是在Apex中手动完成的。你试过了吗？谢谢@AdamSherman，调查一下

import google.auth
import google.auth.app_engine
import google.auth.compute_engine.credentials
import google.auth.iam
from google.auth.transport.requests import Request
import google.oauth2.credentials
import google.oauth2.service_account
import requests
import requests_toolbelt.adapters.appengine


IAM_SCOPE = 'https://www.googleapis.com/auth/iam'
OAUTH_TOKEN_URI = 'https://www.googleapis.com/oauth2/v4/token'


def make_iap_request(url, client_id, method='GET', **kwargs):
    """Makes a request to an application protected by Identity-Aware Proxy.

    Args:
      url: The Identity-Aware Proxy-protected URL to fetch.
      client_id: The client ID used by Identity-Aware Proxy.
      method: The request method to use
              ('GET', 'OPTIONS', 'HEAD', 'POST', 'PUT', 'PATCH', 'DELETE')
      **kwargs: Any of the parameters defined for the request function:
                https://github.com/requests/requests/blob/master/requests/api.py
                If no timeout is provided, it is set to 90 by default.

    Returns:
      The page body, or raises an exception if the page couldn't be retrieved.
    """
    # Set the default timeout, if missing
    if 'timeout' not in kwargs:
        kwargs['timeout'] = 90

    # Figure out what environment we're running in and get some preliminary
    # information about the service account.
    bootstrap_credentials, _ = google.auth.default(
        scopes=[IAM_SCOPE])
    if isinstance(bootstrap_credentials,
                  google.oauth2.credentials.Credentials):
        raise Exception('make_iap_request is only supported for service '
                        'accounts.')
    elif isinstance(bootstrap_credentials,
                    google.auth.app_engine.Credentials):
        requests_toolbelt.adapters.appengine.monkeypatch()

    # For service account's using the Compute Engine metadata service,
    # service_account_email isn't available until refresh is called.
    bootstrap_credentials.refresh(Request())

    signer_email = bootstrap_credentials.service_account_email
    if isinstance(bootstrap_credentials,
                  google.auth.compute_engine.credentials.Credentials):
        # Since the Compute Engine metadata service doesn't expose the service
        # account key, we use the IAM signBlob API to sign instead.
        # In order for this to work:
        #
        # 1. Your VM needs the https://www.googleapis.com/auth/iam scope.
        #    You can specify this specific scope when creating a VM
        #    through the API or gcloud. When using Cloud Console,
        #    you'll need to specify the "full access to all Cloud APIs"
        #    scope. A VM's scopes can only be specified at creation time.
        #
        # 2. The VM's default service account needs the "Service Account Actor"
        #    role. This can be found under the "Project" category in Cloud
        #    Console, or roles/iam.serviceAccountActor in gcloud.
        signer = google.auth.iam.Signer(
            Request(), bootstrap_credentials, signer_email)
    else:
        # A Signer object can sign a JWT using the service account's key.
        signer = bootstrap_credentials.signer

    # Construct OAuth 2.0 service account credentials using the signer
    # and email acquired from the bootstrap credentials.
    service_account_credentials = google.oauth2.service_account.Credentials(
        signer, signer_email, token_uri=OAUTH_TOKEN_URI, additional_claims={
            'target_audience': client_id
        })

    # service_account_credentials gives us a JWT signed by the service
    # account. Next, we use that to obtain an OpenID Connect token,
    # which is a JWT signed by Google.
    google_open_id_connect_token = get_google_open_id_connect_token(
        service_account_credentials)

    # Fetch the Identity-Aware Proxy-protected URL, including an
    # Authorization header containing "Bearer " followed by a
    # Google-issued OpenID Connect token for the service account.
    resp = requests.request(
        method, url,
        headers={'Authorization': 'Bearer {}'.format(
            google_open_id_connect_token)}, **kwargs)
    if resp.status_code == 403:
        raise Exception('Service account {} does not have permission to '
                        'access the IAP-protected application.'.format(
                            signer_email))
    elif resp.status_code != 200:
        raise Exception(
            'Bad response from application: {!r} / {!r} / {!r}'.format(
                resp.status_code, resp.headers, resp.text))
    else:
        return resp.text


def get_google_open_id_connect_token(service_account_credentials):
    """Get an OpenID Connect token issued by Google for the service account.

    This function:

      1. Generates a JWT signed with the service account's private key
         containing a special "target_audience" claim.

      2. Sends it to the OAUTH_TOKEN_URI endpoint. Because the JWT in #1
         has a target_audience claim, that endpoint will respond with
         an OpenID Connect token for the service account -- in other words,
         a JWT signed by *Google*. The aud claim in this JWT will be
         set to the value from the target_audience claim in #1.

    For more information, see
    https://developers.google.com/identity/protocols/OAuth2ServiceAccount .
    The HTTP/REST example on that page describes the JWT structure and
    demonstrates how to call the token endpoint. (The example on that page
    shows how to get an OAuth2 access token; this code is using a
    modified version of it to get an OpenID Connect token.)
    """

    service_account_jwt = (
        service_account_credentials._make_authorization_grant_assertion())
    request = google.auth.transport.requests.Request()
    body = {
        'assertion': service_account_jwt,
        'grant_type': google.oauth2._client._JWT_GRANT_TYPE,
    }
    token_response = google.oauth2._client._token_endpoint_request(
        request, OAUTH_TOKEN_URI, body)
    return token_response['id_token']