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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi Thulasi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Currently in (1.0.1) we are following the following sequence, which now need to replace with EVP.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><u><span style="mso-fareast-language:EN-US">Current sequence<o:p></o:p></span></u></p>
<p class="MsoNormal"><u><span style="mso-fareast-language:EN-US"><o:p><span style="text-decoration:none"> </span></o:p></span></u></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">//to create RSA pubkey<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">rsa = PEM_read_bio_RSA_PUBKEY(keybio, NULL, NULL, NULL); // !!!
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">//to decrypt using RSA utility<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">RSA_public_decrypt(len, (unsigned char*)buffer,decrypted,rsa, RSA_PKCS1_PADDING) ;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">As you mentioned , if we use
</span><span style="font-family:"Courier New";color:black;background:#F8F8F8">PEM_read_bio_PUBKEY to get EVP_PKEY, it will be a pubkey right ? but in order to decrypt as per the example in
<a href="https://www.openssl.org/docs/manmaster/man3/EVP_PKEY_decrypt_init.html">
https://www.openssl.org/docs/manmaster/man3/EVP_PKEY_decrypt_init.html</a></span><span style="font-family:"Courier New";background:#F8F8F8"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black;background:#F8F8F8">We need to use an RSA private key</span><span style="font-family:"Courier New";background:#F8F8F8"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";background:#F8F8F8"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black;background:#F8F8F8">Please suggest.</span><span style="font-family:"Courier New";background:#F8F8F8"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black;background:#F8F8F8"></span><span style="mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Sunil<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Thulasi Goriparthi <thulasi.goriparthi@gmail.com>
<br>
<b>Sent:</b> 29 January 2021 13:07<br>
<b>To:</b> Narayana, Sunil Kumar <sanarayana@rbbn.com><br>
<b>Cc:</b> openssl-users@openssl.org<br>
<b>Subject:</b> Re: <Replacement for RSA_public_decrypt><o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">NOTICE: This email was received from an EXTERNAL sender<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New";color:black;background:#F8F8F8">Hope, you are referring to </span><span style="font-family:"Courier New";color:black"><a href="https://protect-us.mimecast.com/s/C67CC73AG3hQlMmXs8mmvp?domain=openssl.org">https://www.openssl.org/docs/man1.0.2/man3/EVP_PKEY_encrypt.html</a></span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">Use <span style="color:black;background:#F8F8F8">PEM_read_bio_PUBKEY to get EVP_PKEY.</span></span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New";color:black;background:#F8F8F8">eng is for engine reference. If you have no engine, it can be NULL.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">Thanks,</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">Thulasi.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Fri, 29 Jan 2021 at 10:13, Narayana, Sunil Kumar <<a href="mailto:sanarayana@rbbn.com">sanarayana@rbbn.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="background:white"><span style="color:#212121">Dear Openssl team,<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="color:#212121"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> While migrating from 1.0.2 to 3.0 we observe that RSA_public_decrypt() API been deprecated in 3.0.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">We referred the example provided in man page but we are not clear in generating the initial ‘key’ required to create CTX.
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Please suggest on (key , eng) params to proceed
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Also currently we are using PEM_read_bio_RSA_PUBKEY() to generate RSA, I think this might not require in case of EVP, please suggest.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">/*<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> * NB: assumes key, eng, in, inlen are already set up<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> * and that key is an RSA private key<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> */<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">ctx = EVP_PKEY_CTX_new(key, eng);<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Regards,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Sunil<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><br>
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