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Bug: SBS interrupt redirect loses its nonce after StepUp

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难度
2/5
预计耗时
1-3 小时
新手友好度
82/100
Issue 类型
缺陷
描述清晰度
描述清楚
活跃度
活跃
技术栈
php
领域
authentication

调研方向

从StepupAssertionConsumer开始，追踪存储的原始SBS响应在StepUp之后是如何处理的；issue指出handleSramInterruptCallout()是相关调用。找到现有的组合流程场景及其SBS mock，然后为重定向nonce和SBS之后的继续执行添加断言。完成标准是保留原始nonce，并且列出的仅StepUp流程和SBS流程仍能正常工作。

由索引模型根据 Issue 内容生成。

描述

When an SP requires both StepUp and an SRAM/SBS check, SBS may return an interrupt response with a nonce. EngineBlock stores that nonce and performs StepUp first. After StepUp returns, EngineBlock redirects the browser to SBS with an empty nonce query parameter instead of the nonce SBS issued. This may prevent SBS from resuming the interrupt flow.

In StepupAssertionConsumer , EngineBlock detects the stored SRAM step but passes the StepUp Gateway response to handleSramInterruptCallout() rather than the original response containing the SBS nonce.

Steps to reproduce

  1. Configure an SP to require StepUp and SRAM collaboration; enable eb.feature_enable_sram_interrupt .
  2. Configure SBS to return an interrupt response with a nonce, such as my-nonce .
  3. Log in through the IdP and complete StepUp.
  4. Inspect the browser's redirect to SBS.

Actual result
The SBS redirect contains an empty nonce, such as ?nonce= .

Expected result
The redirect contains the nonce from SBS's original interrupt response, such as ?nonce=my-nonce . The user can then complete the SBS step and continue through consent to the SP.

Acceptance criteria
• The SBS redirect after StepUp carries the original SBS nonce.
• A regression test asserts the nonce in the redirect and verifies the flow can continue after SBS.
• Existing StepUp-only, SBS-authorized, and SBS-interrupt-without-StepUp flows continue to work.

Technical hint: Pass the stored original response to handleSramInterruptCallout() in StepupAssertionConsumer . The existing combined-flow scenario does not assert the nonce, and its SBS mock ignores the redirect query string.

主要语言
PHP
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