From: Denis Kenzior <denkenz@gmail.com>
To: Eric Biggers <ebiggers@kernel.org>,
James Bottomley <James.Bottomley@hansenpartnership.com>
Cc: Zhang Yiqun <zhangyiqun@phytium.com.cn>,
dhowells@redhat.com, jarkko@kernel.org, corbet@lwn.net,
keyrings@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org
Subject: Re: [PATCH] KEYS: Add ECDH support
Date: Sat, 30 Mar 2024 21:38:05 -0500 [thread overview]
Message-ID: <aae9bc89-ca34-400f-9c5e-44be1df2befa@gmail.com> (raw)
In-Reply-To: <20240331004844.GA104623@sol.localdomain>
Hi Eric,
>
> Amusingly, the existing KEYCTL_DH_* APIs, and the KEYCTL_ECDH_* APIs proposed by
> this patch, only operate on user keys that the process has READ access to. This
> means that the keys can be trivially extracted by a shell script running in your
> user session. That's *less* secure than using an isolated process...
>
I can see this being true for user or session keys, but I don't think this is
true of process or thread specific keys. At least I couldn't read any keys out
of a test app when I tried.
Regards,
-Denis
WARNING: multiple messages have this Message-ID (diff)
From: Denis Kenzior <denkenz@gmail.com>
To: Eric Biggers <ebiggers@kernel.org>,
James Bottomley <James.Bottomley@hansenpartnership.com>
Cc: Zhang Yiqun <zhangyiqun@phytium.com.cn>,
dhowells@redhat.com, jarkko@kernel.org, corbet@lwn.net,
keyrings@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org
Subject: Re: [PATCH] KEYS: Add ECDH support
Date: Sat, 30 Mar 2024 21:38:05 -0500 [thread overview]
Message-ID: <aae9bc89-ca34-400f-9c5e-44be1df2befa@gmail.com> (raw)
Message-ID: <20240331023805.1AoPhJORJ23GGz3i7tJSgaiJc6X_9YlZ5LdSEWwpaD4@z> (raw)
In-Reply-To: <20240331004844.GA104623@sol.localdomain>
Hi Eric,
>
> Amusingly, the existing KEYCTL_DH_* APIs, and the KEYCTL_ECDH_* APIs proposed by
> this patch, only operate on user keys that the process has READ access to. This
> means that the keys can be trivially extracted by a shell script running in your
> user session. That's *less* secure than using an isolated process...
>
I can see this being true for user or session keys, but I don't think this is
true of process or thread specific keys. At least I couldn't read any keys out
of a test app when I tried.
Regards,
-Denis
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Subject: Re: [PATCH] KEYS: Add ECDH support
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To: Eric Biggers <ebiggers@kernel.org>,
James Bottomley <James.Bottomley@hansenpartnership.com>
Cc: Zhang Yiqun <zhangyiqun@phytium.com.cn>, dhowells@redhat.com,
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From: Denis Kenzior <denkenz@gmail.com>
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Hi Eric,
>
> Amusingly, the existing KEYCTL_DH_* APIs, and the KEYCTL_ECDH_* APIs proposed by
> this patch, only operate on user keys that the process has READ access to. This
> means that the keys can be trivially extracted by a shell script running in your
> user session. That's *less* secure than using an isolated process...
>
I can see this being true for user or session keys, but I don't think this is
true of process or thread specific keys. At least I couldn't read any keys out
of a test app when I tried.
Regards,
-Denis
next prev parent reply other threads:[~2024-03-31 2:38 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-30 6:55 [PATCH] KEYS: Add ECDH support Zhang Yiqun
2024-03-30 7:04 ` Eric Biggers
2024-03-30 13:09 ` James Bottomley
2024-03-31 0:48 ` Eric Biggers
2024-03-31 2:38 ` Denis Kenzior [this message]
2024-03-31 2:38 ` Denis Kenzior
2024-03-31 13:01 ` James Bottomley
2024-03-31 15:44 ` Jarkko Sakkinen
2024-03-30 11:00 ` Jarkko Sakkinen
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