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`RsaPrivateKey::validate()` does not ensure `precompute()` won't fail

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还没有人认领这个 Issue。

评估

难度
3/5
预计耗时
1-2 天
新手友好度
45/100
Issue 类型
缺陷
描述清晰度
基本清楚
活跃度
停滞
技术栈
rust
领域
cryptography

调研方向

Start with RsaPrivateKey::validate(), RsaPrivateKey::from_components(), and the precompute() call described in the issue. Check whether valid keys can fail during precomputation and whether the error is currently discarded. Done means validation and construction handle precompute failures consistently, with relevant tests covering the failure path.

由索引模型根据 Issue 内容生成。

描述

In RsaPrivateKey::from_components(), precompute() errors are ignored because it is claimed that the previous call to validate() guarantees it succeeds.

First of all, this is not the case - there can be bugs in precompute itself. I bumped into it while working on #506. In

let q_mod_p = BoxedMontyForm::new(q_mod_p, p_params.clone());

where I accidentally typed q_params instead of p_params, so the subsequent inversion failed.

Second, what are we even achieving by ignoring the errors there? Are there valid keys for which the values cannot be precomputed? from_components() already returns a Result, we might as well just forward the precompute() error to it.

主要语言
Rust
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PR 合并指标
30 天内没有已合并 PR

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