Check chain extensions also for trusted certificates

This includes basic constraints, key usages, issuer EKUs and auxiliary
trust OIDs (given a trust suitably related to the intended purpose).

Added tests and updated documentation.

Reviewed-by: Dr. Stephen Henson <steve@openssl.org>

6 files changed, 104 insertions, 1 deletions

diff --git a/test/certs/root+anyEKU.pem b/test/certs/root+anyEKU.pem
new file mode 100644
index 0000000000..97e0732189
--- /dev/null
+++ b/test/certs/root+anyEKU.pem
@@ -0,0 +1,18 @@
+-----BEGIN TRUSTED CERTIFICATE-----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=
+-----END TRUSTED CERTIFICATE-----
diff --git a/test/certs/root-anyEKU.pem b/test/certs/root-anyEKU.pem
new file mode 100644
index 0000000000..712b1f572a
--- /dev/null
+++ b/test/certs/root-anyEKU.pem
@@ -0,0 +1,18 @@
+-----BEGIN TRUSTED CERTIFICATE-----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=
+-----END TRUSTED CERTIFICATE-----
diff --git a/test/certs/root2+clientAuth.pem b/test/certs/root2+clientAuth.pem
new file mode 100644
index 0000000000..41355b040e
--- /dev/null
+++ b/test/certs/root2+clientAuth.pem
@@ -0,0 +1,19 @@
+-----BEGIN TRUSTED CERTIFICATE-----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+-----END TRUSTED CERTIFICATE-----
diff --git a/test/certs/root2+serverAuth.pem b/test/certs/root2+serverAuth.pem
new file mode 100644
index 0000000000..52053f1bf6
--- /dev/null
+++ b/test/certs/root2+serverAuth.pem
@@ -0,0 +1,19 @@
+-----BEGIN TRUSTED CERTIFICATE-----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+-----END TRUSTED CERTIFICATE-----
diff --git a/test/certs/root2-serverAuth.pem b/test/certs/root2-serverAuth.pem
new file mode 100644
index 0000000000..dae848a1a9
--- /dev/null
+++ b/test/certs/root2-serverAuth.pem
@@ -0,0 +1,19 @@
+-----BEGIN TRUSTED CERTIFICATE-----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+-----END TRUSTED CERTIFICATE-----
diff --git a/test/certs/setup.sh b/test/certs/setup.sh
index b50f7e3015..795ff4aa0f 100755
--- a/test/certs/setup.sh
+++ b/test/certs/setup.sh
@@ -2,7 +2,7 @@
 
 # Primary root: root-cert
 # root certs variants: CA:false, key2, DN2
-# trust variants: +serverAuth -serverAuth +clientAuth
+# trust variants: +serverAuth -serverAuth +clientAuth +anyEKU -anyEKU
 #
 ./mkcert.sh genroot "Root CA" root-key root-cert
 ./mkcert.sh genss "Root CA" root-key root-nonca
@@ -15,6 +15,16 @@ openssl x509 -in root-cert.pem -trustout \
     -addreject serverAuth -out root-serverAuth.pem
 openssl x509 -in root-cert.pem -trustout \
     -addtrust clientAuth -out root+clientAuth.pem
+openssl x509 -in root-cert.pem -trustout \
+    -addreject anyExtendedKeyUsage -out root-anyEKU.pem
+openssl x509 -in root-cert.pem -trustout \
+    -addtrust anyExtendedKeyUsage -out root+anyEKU.pem
+openssl x509 -in root-cert2.pem -trustout \
+    -addtrust serverAuth -out root2+serverAuth.pem
+openssl x509 -in root-cert2.pem -trustout \
+    -addreject serverAuth -out root2-serverAuth.pem
+openssl x509 -in root-cert2.pem -trustout \
+    -addtrust clientAuth -out root2+clientAuth.pem
 
 # Primary intermediate ca: ca-cert
 # ca variants: CA:false, key2, DN2, issuer2, expired