feat: Enable client certificates

[Akatuoro]

Behaviour should be implemented by @sap/hana-client.

This PR is to show what it takes to get it to run from a user perspective.

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Enable x509 client certificates for hana connections. The order of key and certificate has to be switched so that it can be read by openssl inside @sap/hana-client.

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To try it:

cds init bookshop --add tiny-sample,hana
cd bookshop
npm add @sap/hana-client

# cf login --sso
cds deploy -2 hana

# replace normal key (necessary for cds deploy) with x509 key
cf dsk -f bookshop-db bookshop-db-key --wait
cf csk bookshop-db bookshop-db-key -c '{"credential-type": "x509"}'

cds w --profile hybrid

Go to http://localhost:4004/odata/v4/catalog/Books

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• hana binding parameter
• https://developers.sap.com/tutorials/hana-clients-x509..html

[johannes-vogel]

@Akatuoro I think we can close this one since SAP/node-hdb#262 got merged?
I think the same will also be released for @sap/hana-client

[Akatuoro]

@Akatuoro I think we can close this one since SAP/node-hdb#262 got merged? I think the same will also be released for @sap/hana-client

@sap/hana-client is still open, looped you in to the mail thread