hi,

I am testing smartcard authentication with a yubikey neo like described in https://frasertweedale.github.io/blog-redhat/posts/2016-08-12-yubikey-sc-login.html

I successfully generated a key using the yubico-piv-tool, and with that a csr.

yubico-piv-tool -a verify-pin -a request-certificate -s 9e -S "/CN=user50/"
Enter PIN:
Successfully verified PIN.

-----BEGIN CERTIFICATE REQUEST-----
MIICVjCCAT4CAQAwETEPMA0GA1UEAwwGdXNlcjUwMIIBIjANBgkqhkiG9w0BAQEF
AAOCAQ8AMIIBCgKCAQEAkWjUxl0qInlYB4TiZ7GkJkgBdomTTzk5GfK76ZizbsGV
4xyPmUgf+7eEO3GEvkGiBPJxk0NVJuamuEJTIXtn7h7Wgz6ghCE0uCCupjAJqa57
Hdm3h3GvofwWuE442YIRHvXydaSkrCAGsL/M3g4tVi7Xn+jTaWrzKsAeqJxQVRPD
h4R9bN4BIzXL+62qGI9jriM8dJEWCrGFzg6viCujRlybkhQhiLxCGvS8lO3HQ7tF
lDRZN6Ey/nvFxIC1MtGZgrN3nj/Z37nIBWF4s20CcJau8mfalJQEFjqLkjMh7X8K
hWKrSdNj43nBTlO0So3qezs4roLkZFSN1hQnCG/pCQIDAQABoAAwDQYJKoZIhvcN
AQELBQADggEBAH22PLW7Tuc6y5VxIpnaqdsborbp+Twr/kPoDnibJPjV8JBYqC4G
iQCHDJn+uuJSpiBxTUtYX45CscOiwD8kiDoYIH/DCXUqPAhRudsBpJWDn9TKeFC5
b0PrwuN5cDo+yKYZW590eLL8/xdjtb9p/M3AU5tSJTbG3dCA5Rp4MdgE97pOYkPg
3kUHR19YjH/GnZHeuv8Af+WIJVMvDVGKF+MvJEImSjg/ZQUV6hzBI+oAWr9Hj21q
KABjiO5AhMyo+uC6WXajkltzUP30cbBlNl0Z34Dw452Ym5uILWAF+ZmlT0sp0Mg4
lwNPSwst5mhUtQL7AmNHYHg7cAAgXx9Xql0=
-----END CERTIFICATE REQUEST-----
Successfully generated a certificate request.

With this csr I try generating a certificate but it fails:

$ ipa cert-request user50.csr --principal user50 --raw
ipa: ERROR: Request failed with status 500: Non-2xx response from CA REST API: 500. Invalid Request

In the pki logs I only see this error.

192.168.5.10 - ipara [08/Nov/2018:22:37:12 +0100] "GET /ca/rest/authorities/edb13864-3c75-4c7d-b5b8-dd4322789437/cert HTTP/1.1" 200 920
192.168.5.10 - ipara [08/Nov/2018:22:37:12 +0100] "GET /ca/rest/account/logout HTTP/1.1" 204 -
192.168.5.10 - - [08/Nov/2018:22:37:13 +0100] "POST /ca/rest/certrequests?issuer-id=edb13864-3c75-4c7d-b5b8-dd4322789437 HTTP/1.1" 500 123

Any ideas as to what is going wrong?

Thanks!