Hi Is this the right mailing list to ask this question ? Can somebody suggest a better ML Thanks From: Alex Samad - Yieldbroker Sent: Wednesday, 18 March 2015 2:21 PM To: openssl-users at openssl.org Subject: RE: question about resigning a certificate Hi I have done that and compared the output with diff The only differences are Serial number Signature algo Comment Signature. Alex From: openssl-users [mailto:openssl-users-bounces@xxxxxxxxxxx] On Behalf Of Jakob Bohm Sent: Wednesday, 18 March 2015 6:50 AM To: openssl-users at openssl.org<mailto:openssl-users at openssl.org> Subject: Re: question about resigning a certificate On 16/03/2015 02:46, Alex Samad - Yieldbroker wrote: Hi I had a sha1 signed CA and I issued other identity and CA certificates from this CA. With the deprecation of sha1 coming, I resigned my original CA (self signed) as sha512, with the same creation and expiry dates. I believe the only thing changed was the signature and serial number. But when I go to verify older certs that were signed by the original CA (the sha1 signed one), they are no longer valid. I thought if I used the same private and public key I should be okay. I thought the only relevant issue was the issuer field and that the CA keys where the same . Was I wrong. Alex Run openssl x509 -noout -text -in OneOfYourIssuedCerts.pem | more Look at what aspects of your CA are mentioned. For example, does it include the "X509v3 Authority Key Identifier" extension, and if so, which fields from the CA cert are included? Enjoy Jakob -- Jakob Bohm, CIO, Partner, WiseMo A/S. http://www.wisemo.com Transformervej 29, 2860 S?borg, Denmark. Direct +45 31 13 16 10 This public discussion message is non-binding and may contain errors. WiseMo - Remote Service Management for PCs, Phones and Embedded -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mta.openssl.org/pipermail/openssl-users/attachments/20150322/4f0c0cdb/attachment-0001.html>
