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https://social.technet.microsoft.com/Forums/office/en-US/9fc39eb5-ccb0-4447-aa6f-73b3b4cf0b64/the-signer-certificates-keyusage-extension-doesnt-allow-code-signing
Jan 07, 2016 · Your screen shot does confirm what I am saying as there is no Enhanced Key Usage listed in the top box, there is Key Usage, but not Enhanced Key Usage. Go ahead and pull up a screen shot of the same screen of the default Code Signing template and you will see what I …
https://stackoverflow.com/questions/40007493/jnlp-extended-key-usage-does-not-permit-use-for-code-signing
Once the keystore is created this way I add the intermediate and root ca to it, create the jar and sign it without eventually getting the "Extended key usage does not permit use for code signing". So the question is somewhat twofold. 1. Why does the jar signed after creating private and csr via openssl not get this error; and 2.
https://www.ibm.com/support/knowledgecenter/en/SSKTMJ_9.0.1/admin/conf_keyusageextensionsandextendedkeyusage_r.html
Table 1. Key usage extensions; Key usage extension. Description. Digital signature. Use when the public key is used with a digital signature mechanism to support security services other than non-repudiation, certificate signing, or CRL signing.
https://social.msdn.microsoft.com/Forums/vstudio/en-US/e50c3dd9-4540-4196-aa3e-2bd8b877a7ed/extended-key-usage-extensions
Sep 12, 2016 · Hi, I have a commercial code signing certificate that does not work to sign appxbundles. The only difference between this code signing certificate and a code signing certificate that works is the extended key usage extension. The certificate that works only asserts code signing. The certificate ... · Hi Carl Wallace, Move to Submitting and Publishing ...
https://security.stackexchange.com/questions/49543/java-applet-need-code-signing-certificate-vs-ssl-certificate
It is up to your CA to write the relevant extension; a certificate for a SSL server will not contain such an extension by default (if it has an "extended key usage", it will contains OID for things like "server authentication", not for "code signing"). You will have to obtain a specific code signing certificate. Not all CA sell this sort of thing.
https://www.sslsupportdesk.com/details-digital-certificate-mean/
You will pretty much never find the same key Usage attributes of an End Entity certificate and a Intermediate Root CA certificate in one certificate. Certificate Signing: This attribute give the capability of signing other certificates, but does not have the ability to …
https://social.technet.microsoft.com/Forums/windowsserver/en-US/0e367ca7-2f96-4612-9266-282ee8912bf7/certificate-server-what-properties-for-a-code-signing-certificate-
Mar 29, 2011 · The default 'Code Signing' certificate template is a version 1 template from Windows 2000. This certificate does not allow the private key to be exported for issued certificates, which means it is only valid on the requesting machine.
https://docs.microsoft.com/en-us/powershell/module/pkiclient/new-selfsignedcertificate
The default value of ExportableEncrypted is not compatible with KSP and CSPs that do not allow key export. These include the Microsoft Smart Card Key Storage Provider and the Microsoft Platform Crypto Key Storage Provider. Specify NonExportable for providers that do not allow key export.
https://security.stackexchange.com/questions/117066/what-key-usage-values-are-required-to-support-code-signing
I have a .pfx that I want to use to sign a Clickonce app. However, on trying to do so, Visual Studio gives me "The selected certificate is not valid for code signing." When I go to certmgr.msc and check the certificate, it states "Code signing" under Enhanced Key Usage (non-critical) and "Key Encipherment" under Key Usage (critical).
https://stackoverflow.com/questions/204463/what-is-special-about-a-code-signing-certificate
To my knowledge, certificates have a "key usage" attribute that describes what uses the cert is intended for: SSL server, code signing, e-mail signing, etc. So I think it's up to the OS, or web browser, or e-mail client, to check these bits.
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