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<a href="https://gitlab.com/yan12125">Chih-Hsuan Yen</a> created an issue: <a href="https://gitlab.com/gnutls/gnutls/-/issues/1309">#1309</a>
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<a id="user-content-description-of-problem" class="anchor" href="#description-of-problem" aria-hidden="true"></a>Description of problem:</h2>
<p dir="auto">I'm testing PKCS#11 via SoftHSM, and I noticed p11tool failed to generate Ed25519 keys. Digging a little, it seems a GnuTLS issue instead of a SoftHSM one - apparently GnuTLS uses a wrong mechanism for generating Ed25519 keys? Specifically, GnuTLS uses <code>CKM_EDDSA</code> [1], while this mechanism is for sign/verify instead of key generation [2].</p>
<p dir="auto">[1] <a href="https://gitlab.com/gnutls/gnutls/-/blob/3.7.2/lib/pkcs11_int.h#L295">https://gitlab.com/gnutls/gnutls/-/blob/3.7.2/lib/pkcs11_int.h#L295</a></p>
<p dir="auto">[2] <a href="https://docs.oasis-open.org/pkcs11/pkcs11-curr/v3.0/csprd01/pkcs11-curr-v3.0-csprd01.pdf" rel="nofollow noreferrer noopener" target="_blank">https://docs.oasis-open.org/pkcs11/pkcs11-curr/v3.0/csprd01/pkcs11-curr-v3.0-csprd01.pdf</a>, table 33</p>
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<a id="user-content-version-of-gnutls-used" class="anchor" href="#version-of-gnutls-used" aria-hidden="true"></a>Version of gnutls used:</h2>
<p dir="auto">3.7.2, with SoftHSM 2.6.1</p>
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<a id="user-content-distributor-of-gnutls-eg-ubuntu-fedora-rhel" class="anchor" href="#distributor-of-gnutls-eg-ubuntu-fedora-rhel" aria-hidden="true"></a>Distributor of gnutls (e.g., Ubuntu, Fedora, RHEL)</h2>
<p dir="auto">Arch Linux</p>
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<a id="user-content-how-reproducible" class="anchor" href="#how-reproducible" aria-hidden="true"></a>How reproducible:</h2>
<p dir="auto">Steps to Reproduce:</p>
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<pre class="code highlight js-syntax-highlight language-plaintext" lang="plaintext" v-pre="true"><code><span id="LC1" class="line" lang="plaintext">$ softhsm2-util --init-token --free --label MyToken</span>
<span id="LC2" class="line" lang="plaintext">$ p11tool --login --generate-privkey Ed25519 --label Ed25519 --outfile key.pem "pkcs11:model=SoftHSM%20v2;token=MyToken" </span></code></pre>
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<a id="user-content-actual-results" class="anchor" href="#actual-results" aria-hidden="true"></a>Actual results:</h2>
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<pre class="code highlight js-syntax-highlight language-plaintext" lang="plaintext" v-pre="true"><code><span id="LC1" class="line" lang="plaintext">Generating an EdDSA (Ed25519) key...</span>
<span id="LC2" class="line" lang="plaintext">Token 'MyToken' with URL 'pkcs11:model=SoftHSM%20v2;manufacturer=SoftHSM%20project;serial=6e5932b8da7f62f0;token=MyToken' requires user PIN</span>
<span id="LC3" class="line" lang="plaintext">Enter PIN: </span>
<span id="LC4" class="line" lang="plaintext">Error in pkcs11_generate:1355: PKCS #11 unsupported feature</span></code></pre>
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<a id="user-content-expected-results" class="anchor" href="#expected-results" aria-hidden="true"></a>Expected results:</h2>
<p dir="auto">Key generation succeeds</p>
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