使用 Amazon Cognito 进行手动身份验证

Question

我知道以用户身份进行身份验证并获得access token 的两种方法，一种是通过Hosted UI，另一种是通过various provided SDKs。

我正在寻找的是一个端点直接使用用户凭据获取access token。

POST https://that-special-endpoint.com/login
{
 username: "example@email.com",
 password: "Abc123456",
 ...client ID, etc.
}

我已经搜索了一段时间，但找不到如何执行此操作。由于一些我不知道的安全问题，这不可能吗？

我确实考虑过创建一个 Lambda API 并使用 Cognito SDK 来满足我的用例，但我不确定这是否可取...

Answer 1

回答了类似的问题here。您可以访问https://cognito-idp.[region].amazonaws.com/ 调用InitiateAuth 和RespondToAuthChallenge API。

---

启动验证

---

1. 创建一个json文件，aws-auth-data.json

{
    "AuthParameters": {
        "USERNAME": "your-email@example.com",
        "PASSWORD": "your-first-password",
        "SECRET_HASH": "......(required if the app client is configured with a client secret)"
    },
    "AuthFlow": "USER_PASSWORD_AUTH",
    "ClientId": "5m........................"
}

1. 在https://cognito-idp.us-east-2.amazonaws.com/（如果用户池位于us-east-2 区域）上发送请求以调用InitiateAuth API 并启动身份验证流程。

curl -X POST --data @aws-auth-data.json \
-H 'X-Amz-Target: AWSCognitoIdentityProviderService.InitiateAuth' \
-H 'Content-Type: application/x-amz-json-1.1' \
https://cognito-idp.us-east-2.amazonaws.com/

1. 然后你会得到用户的令牌。

{
    "AuthenticationResult": {
        "AccessToken": "eyJra........",
        "ExpiresIn": 3600,
        "IdToken": "eyJra........",
        "RefreshToken": "eyJjd........",
        "TokenType": "Bearer"
    },
    "ChallengeParameters": {}
}

---

RespondToAuthChallenge

---

您可能会收到InitiateAuth 回复的挑战。例如，当您第一次尝试“InitiateAuth”时，系统会要求您更改密码：

{
    "ChallengeName": "NEW_PASSWORD_REQUIRED",
    "ChallengeParameters": {
        "USER_ID_FOR_SRP": "abababab-......",
        "requiredAttributes": "[]",
        "userAttributes": "{\"email_verified\":\"true\",\"email\":\"your-email@example.com\"}"
    },
    "Session": "DNdY......"
}

在这种情况下，使用RespondToAuthChallenge 更改密码，您将获得令牌。

{
    "ChallengeName": "NEW_PASSWORD_REQUIRED",
    "ChallengeResponses": {
        "USERNAME": "your-email@example.com",
        "NEW_PASSWORD": "your-second-password"
    },
    "ClientId": "5m........................",
    "Session": "DNdYN...(what you got in the preceding response)"
}

curl -X POST --data @aws-change-password.json \
-H 'X-Amz-Target: AWSCognitoIdentityProviderService.RespondToAuthChallenge' \
-H 'Content-Type: application/x-amz-json-1.1' \
https://cognito-idp.us-east-2.amazonaws.com/

另见：

https://docs.aws.amazon.com/cognito-user-identity-pools/latest/APIReference/API_InitiateAuth.html

https://docs.aws.amazon.com/cognito-user-identity-pools/latest/APIReference/API_RespondToAuthChallenge.html

https://docs.aws.amazon.com/cognito/latest/developerguide/amazon-cognito-user-pools-authentication-flow.html#amazon-cognito-user-pools-client-side-authentication-flow