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Are there example certificates (PEM format) for testing available somewhere ? For test purposes I would need a certificate signed with SHAS256/ECDSA P-256, together with a complete chain to test verification.

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  • $\begingroup$ cloudflare.com uses valid EV ECDSA certificates, you can download DER / PEM certificates using your browser and do the conversion using openssl if neccessary. $\endgroup$
    – SEJPM
    Oct 16, 2016 at 19:09
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    $\begingroup$ Maybe this should go to security.stackexchange.com? $\endgroup$
    – DannyNiu
    Oct 17, 2016 at 10:50

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I used the XCA tool. It allows creation of certificates.

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you can find some ECC certificates using crt.sh tool. For example DigiCert issues ECC certificates, if you narrow the search to this CA, you can manually search for certificates with P-256 curve.

Following filters searches for all certificates issued by DigiCert ECC Secure Server CA https://crt.sh/?Identity=%25&iCAID=1516

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