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<p class="MsoNormal">Hello OpenSSL Users,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m trying to use SHA1 message digest hashing in combination with the FIPS provider, but seem to be running into issues. My code looks like the following:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Courier">EVP_PKEY* privateKey = getPrivateKey();<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Courier">EVP_MD_CTX* mdContex = EVP_MD_CTX_new();<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Courier">if (mdContex != NULL) {<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Courier"> const EVP_MD* messageDigest = EVP_MD_fetch(NULL, "SHA-1", "provider=fips");<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Courier"> if (EVP_DigestSignInit(mdContex, NULL, messageDigest, NULL, privateKey) == 1) {<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Courier"> std::cout << "Success";<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Courier"> } else {<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Courier"> std::cout << "EVP_DigestSignInit failed";<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Courier"> }<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:36.0pt"><span style="font-size:10.0pt;font-family:Courier">EVP_MD_CTX_free(mdContex);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Courier">}<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The call to EVP_DigestSignInit() always fails. If I switch to SHA-256 then it works fine. I thought SHA-1 wasn’t allowed for raw sign operations, but was still okay for message digests calculated via the EVP_MD related methods, is that
thinking incorrect? And in fact, all use of SHA-1 with FIPS is disallowed?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Kevin Millson.<o:p></o:p></p>
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