The test credentials (CONFIRMEDTESTKEY) have been generated with the following
commands:

Bad credentials (badclient.* / badserver.*):
============================================

These are self-signed certificates:

$ openssl req -x509 -newkey rsa:2048 -keyout badserver.key -out badserver.pem \
  -days 3650 -nodes

When prompted for certificate information, everything is default except the
common name which is set to badserver.test.google.com.


Valid test credentials:
=======================

The ca is self-signed:
----------------------

$ openssl req -x509 -new -newkey rsa:2048 -nodes -keyout ca.key -out ca.pem \
  -config ca-openssl.cnf -days 3650 -extensions v3_req
When prompted for certificate information, everything is default.

client is issued by CA:
-----------------------

$ openssl genrsa -out client.key.rsa 2048
$ openssl pkcs8 -topk8 -in client.key.rsa -out client.key -nocrypt
$ openssl req -new -key client.key -out client.csr

When prompted for certificate information, everything is default except the
common name which is set to testclient.

$ openssl x509 -req -CA ca.pem -CAkey ca.key -CAcreateserial -in client.csr \
  -out client.pem -days 3650

server0 is issued by CA:
------------------------

$ openssl genrsa -out server0.key.rsa 2048
$ openssl pkcs8 -topk8 -in server0.key.rsa -out server0.key -nocrypt
$ openssl req -new -key server0.key -out server0.csr

When prompted for certificate information, everything is default except the
common name which is set to *.test.google.com.au.

$ openssl x509 -req -CA ca.pem -CAkey ca.key -CAcreateserial -in server0.csr \
  -out server0.pem -days 3650

server1 is issued by CA with a special config for subject alternative names:
----------------------------------------------------------------------------

$ openssl genrsa -out server1.key.rsa 2048
$ openssl pkcs8 -topk8 -in server1.key.rsa -out server1.key -nocrypt
$ openssl req -new -key server1.key -out server1.csr -config server1-openssl.cnf

When prompted for certificate information, everything is default except the
common name which is set to *.test.google.com.

$ openssl x509 -req -CA ca.pem -CAkey ca.key -CAcreateserial -in server1.csr \
  -out server1.pem -extensions req_ext -extfile server1-openssl.cnf -days 3650

multi-domain is a self-signed certificate having multiple subject alternative names:
----------------------------------------------------------------------------

$ openssl genrsa -out multi-domain.key.rsa 2048
$ openssl pkcs8 -topk8 -in multi-domain.key.rsa -out multi-domain.key -nocrypt
$ openssl req -new -key multi-domain.key -out multi-domain.csr -config
multi-domain-openssl.cnf
$ openssl req -x509 -new -extensions v3_req -key multi-domain.key -out
multi-domain.pem -days 3650 -config multi-domain-openssl.cnf

Clean up:
---------
$ rm *.rsa
$ rm *.csr
$ rm ca.srl

Sync up with other repositories
===============================

Copies of these keys (except for multi-domain) exist in multiple locations across all the grpc repos
(e.g., see the following partial list). You need to be careful when updating
the keys.

grpc-dart/interop/
grpc-dotnet/testassets/Certs/InteropTests/
grpc-go/testdata/
grpc-java/testing/src/main/resources/certs/
grpc-node/test/data/
src/csharp/Grpc.IntegrationTesting/data/
src/objective-c/tests/TestCertificates.bundle/
src/php/tests/data/
src/python/grpcio_tests/tests/interop/credentials/
src/python/grpcio_tests/tests/unit/credentials/
src/ruby/spec/testdata/
test/core/end2end/data/