Generate some certificates with the certificatePolicies extension

Related-to: CVE-2023-0465

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20585)

test/certs/ca-pol-cert.pem

@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
+MIIDFzCCAf+gAwIBAgIBAjANBgkqhkiG9w0BAQsFADASMRAwDgYDVQQDDAdSb290
+IENBMCAXDTIzMDMwODEyMjMxNloYDzIxMjMwMzA5MTIyMzE2WjANMQswCQYDVQQD
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+DhcINRp6+lIzuFBtJ67+YXnAEspb3lKMk0YL/LXrCNF2scdmNfOPwHi+OKBqt69C
+9FJyWFEMxx2qm/ENE9sbOswgJRnKkaAqHBHx
+-----END CERTIFICATE-----

test/certs/ee-cert-policies-bad.pem

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
+MIIDTTCCAjWgAwIBAgIBAjANBgkqhkiG9w0BAQsFADANMQswCQYDVQQDDAJDQTAg
+Fw0yMzAzMDgxMjIzMzJaGA8yMTIzMDMwOTEyMjMzMlowGTEXMBUGA1UEAwwOc2Vy
+dmVyLmV4YW1wbGUwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCo/4lY
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+iIQPYf55NB9KiR+3AgMBAAGjgakwgaYwHQYDVR0OBBYEFOeb4iqtimw6y3ZR5Y4H
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+wSGdzfStNK1I1zM5LiI08WtXCvR6AfLANTo2x1AYhSxF
+-----END CERTIFICATE-----

test/certs/ee-cert-policies.pem

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
+MIIDPTCCAiWgAwIBAgIBAjANBgkqhkiG9w0BAQsFADANMQswCQYDVQQDDAJDQTAg
+Fw0yMzAzMDgxMjIzMjNaGA8yMTIzMDMwOTEyMjMyM1owGTEXMBUGA1UEAwwOc2Vy
+dmVyLmV4YW1wbGUwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCo/4lY
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+NGLq2MHEdyKaigHQlptEs9bXyu9McJjzbx0uXj3BenRULASreccFej0L1RU6jDlk
+D3brBn24UISaFRZoB7jsjok=
+-----END CERTIFICATE-----

test/certs/mkcert.sh

@@ -119,11 +119,12 @@ genca() {
     local OPTIND=1
     local purpose=
 
-    while getopts p: o
+    while getopts p:c: o
     do
         case $o in
         p) purpose="$OPTARG";;
-        *) echo "Usage: $0 genca [-p EKU] cn keyname certname cakeyname cacertname" >&2
+        c) certpol="$OPTARG";;
+        *) echo "Usage: $0 genca [-p EKU][-c policyoid] cn keyname certname cakeyname cacertname" >&2
            return 1;;
         esac
     done
@@ -146,6 +147,10 @@ genca() {
     if [ -n "$NC" ]; then
         exts=$(printf "%s\nnameConstraints = %s\n" "$exts" "$NC")
     fi
+    if [ -n "$certpol" ]; then
+        exts=$(printf "%s\ncertificatePolicies = %s\n" "$exts" "$certpol")
+    fi
+
     csr=$(req "$key" "CN = $cn") || return 1
     echo "$csr" |
         cert "$cert" "$exts" -CA "${cacert}.pem" -CAkey "${cakey}.pem" \

test/certs/setup.sh

@@ -465,3 +465,9 @@ OPENSSL_SIGALG=ED448 OPENSSL_KEYALG=ed448 ./mkcert.sh genee ed448 \
 
 # critical id-pkix-ocsp-no-check extension
 ./mkcert.sh geneeextra server.example ee-key ee-cert-ocsp-nocheck ca-key ca-cert "1.3.6.1.5.5.7.48.1.5=critical,DER:05:00"
+
+# certificatePolicies extension
+./mkcert.sh genca -c "1.3.6.1.4.1.16604.998855.1" "CA" ca-key ca-pol-cert root-key root-cert
+./mkcert.sh geneeextra server.example ee-key ee-cert-policies ca-key ca-cert "certificatePolicies=1.3.6.1.4.1.16604.998855.1"
+# We can create a cert with a duplicate policy oid - but its actually invalid!
+./mkcert.sh geneeextra server.example ee-key ee-cert-policies-bad ca-key ca-cert "certificatePolicies=1.3.6.1.4.1.16604.998855.1,1.3.6.1.4.1.16604.998855.1"