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<p class="MsoNormal">Compare SunPKCS11 support for AES vs HMAC<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo4">AES => keygen is supported, and AES key can be used for encrypt and decrypt.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo4">HMAC => keygen is not supported, but HMAC key can be used for MAC.<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This does not make sense. A third-party utility is required for HMAC keygen, but not for AES keygen.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Use case:<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo4">PKCS#11 driver is v2.20.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo4">This means AES-256-GCM is not available for confidentiality and integrity, because GCM supported was only added in PKCS#11 v2.40.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo4">Fallback to AES-256-CBC and HmacSha256 is required for confidentiality and integrity, respectively.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo4">Java can trigger AES keygen, but not HMAC keygen. A third-party utility is required to trigger HMAC keygen before running Java.<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Would it be possible to add the missing GENERIC-SECRET-KEY-GEN mechanism to SunPKCS11? Notice how that mechanism is missing from the documented SunPKCS11 algorithms and mechanisms. It is the same in Java 8 all the way up to 15.<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level1 lfo3"><a href="https://docs.oracle.com/javase/8/docs/technotes/guides/security/p11guide.html#ALG">https://docs.oracle.com/javase/8/docs/technotes/guides/security/p11guide.html#ALG</a><o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">To reproduce and demonstrate the missing HMAC keygen issue, here is a small Java Maven project.<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level1 lfo3"><a href="https://github.com/justincranford/pkcs11">https://github.com/justincranford/pkcs11</a><o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The readme shows the commands to initialize the SoftHSM2 token, and use a third-party OpenSC utility to trigger HMAC keygen. It also shows how to set the required SoftHSM2 env variable and run the Maven build.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The Maven build will execute the ITPkcs11.java integration test class. The tests demonstrate:<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo2">Successful SunPKCS11 login to SoftHSM2 and list any existing keys<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo2">Successful AES keygen, encrypt, decrypt<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo2">Successful HMAC mac<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo2">Failed HMAC keygen (because SunPKCS11 does not support GENERIC-SECRET-KEY-GEN mechanism yet)<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thank you,<o:p></o:p></p>
<p class="MsoNormal">Justin Cranford<o:p></o:p></p>
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