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<p class="MsoNormal"><span lang="EN-US">I have a question to following situation with RSA and DH structures:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I’m testing these in separated unit tests.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Both test cases (each one for RSA and DH) are doing the same:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I’m creating a new DH or RSA structure, filling it with my params (pqg …) and convert it to an EVP_PKEY (for example:
</span><span lang="EN-US" style="font-size:9.5pt;font-family:Consolas;color:#C55A11">EVP_PKEY_assign_DH</span><span lang="EN-US" style="font-size:9.5pt;font-family:Consolas;color:#6F008A">
</span><span lang="EN-US" style="font-size:9.5pt;font-family:Consolas">=> pkey1<span style="color:#6F008A">)</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Next step, I’m writing and reading this structure with these functions:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#C55A11">PEM_write_bio_PrivateKey()
</span><span lang="EN-US">(not <span style="color:#C55A11">PEM_write_bio_PrivateKey_<b>traditional()
</b></span>) (with password)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:9.5pt;font-family:Consolas;color:#2B91AF">EVP_PKEY</span><span lang="EN-US" style="font-size:9.5pt;font-family:Consolas;color:black">* pkey2 =</span><span lang="EN-US">
<span style="color:#C55A11">PEM_read_bio_PrivateKey() </span>(with same password)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">(or even without a password)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Now I want to compare these two </span><span lang="EN-US" style="font-size:9.5pt;font-family:Consolas;color:#2B91AF">EVP_PKEY</span><span lang="EN-US" style="font-size:9.5pt;font-family:Consolas;color:black">*
</span><span lang="EN-US">variables (pkey1 and pkey2) and for that I can use these two functions:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#C55A11">EVP_PKEY_cmp(pkey1, pkey2)
</span><span lang="EN-US">(compares components and params)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#C55A11">EVP_PKEY_cmp_parameters(pkey1, pkey2)
</span><span lang="EN-US">(compares params)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Now the Problem:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:DE">Even the tests work the same way, the one with RSA only accept the compare-function “<span style="color:#C55A11">EVP_PKEY_cmp</span>” and not the other one.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:DE">The one with DH is only with the “<span style="color:#C55A11">EVP_PKEY_cmp_parameters</span>” successful.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:DE"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:DE">Question:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:DE">Why can the first compare function find the components and params of the RSA structure (and even after the
<span style="color:#C55A11">PEM_write_bio</span>…) and not of the DH?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:DE">Also, why it’s with the second compare function (only params) the other way around (keys match in DH unit test and not in RSA unit test)?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:DE"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:DE">Thanks<o:p></o:p></span></p>
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