Creating Wildcard Certificates with makecert.exe

Posted by Shawn Cicoria on Geeks with Blogs See other posts from Geeks with Blogs or by Shawn Cicoria
Published on Tue, 28 Jun 2011 19:14:51 GMT Indexed on 2011/06/29 8:23 UTC
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Be nice to be able to make wildcard certificates for use in development with makecert – turns out, it’s real easy.  Just ensure that your CN=  is the wildcard string to use.

The following sequence generates a CA cert, then the public/private key pair for a wildcard certificate

REM make the CA
makecert -pe -n "CN=*.contosotest.com" -a sha1 -len 2048 -sky exchange -eku 1.3.6.1.5.5.7.3.1 -ic CA.cer -iv CA.pvk -sp "Microsoft RSA SChannel Cryptographic Provider" -sy 12 -sv wildcard.pvk wildcard.cer

pvk2pfx -pvk wildcard.pvk -spc wildcard.cer -pfx wildcard.pfx


REM now make the server wildcard cert
makecert -pe -n "CN=*.contosotest.com" -a sha1 -len 2048 -sky exchange -eku 1.3.6.1.5.5.7.3.1 -ic CA.cer -iv CA.pvk -sp "Microsoft RSA SChannel Cryptographic Provider" -sy 12 -sv wildcard.pvk wildcard.cer

pvk2pfx -pvk wildcard.pvk -spc wildcard.cer -pfx wildcard.pfx

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