test-tools: add generator for test/ocsptest.c PKI

test-tools/README.md

@@ -1,7 +1,8 @@
 # ossl-test-tools
 
-Python tools for OpenSSL's C tests. Edits test artifacts (certs, CRLs,
-keys) into the .c source files in place by variable name.
+Python tools for OpenSSL's C tests. They generate test artifacts (certs,
+CRLs, keys) and edit them into the `.c` source files in place, replacing
+the existing `static const ... kName[]` declarations by variable name.
 
 ## Setup
 
@@ -10,16 +11,31 @@ keys) into the .c source files in place by variable name.
 
 ## Use
 
-    uv run ossl-test-tools crltest all      --source path/to/crltest.c
-    uv run ossl-test-tools crltest indirect --source path/to/crltest.c
-    uv run ossl-test-tools crltest alt-ta   --source path/to/crltest.c
-    uv run ossl-test-tools crltest no-chain --source path/to/crltest.c
+The first argument names the test to update. It matches the `.c` file it
+generates artifacts for, e.g. `crltest` for `test/crltest.c` and
+`ocsptest` for `test/ocsptest.c`. After that comes the generator
+subcommand. Run `--help` at any level to see what is available and the
+parameters each subcommand takes:
 
-Each subcommand has its own `--help`.
+    uv run ossl-test-tools --help
+    uv run ossl-test-tools crltest --help
+    uv run ossl-test-tools ocsptest --help
+
+The generator subcommands take a `--source` pointing at the `.c` file to
+rewrite, and `all` regenerates every artifact for that test:
+
+    uv run ossl-test-tools crltest all       --source path/to/crltest.c
+    uv run ossl-test-tools crltest indirect  --source path/to/crltest.c
+    uv run ossl-test-tools ocsptest all      --source path/to/ocsptest.c
+
+`pem-to-c` formats a PEM file as a C declaration and prints it to stdout,
+for one-off pasting:
+
+    uv run ossl-test-tools pem-to-c some.pem --name kSomething
 
 ## Adding a new variable
 
-Add an empty placeholder to the .c file:
+Add an empty placeholder to the `.c` file:
 
     static const char *kSomething[] = {};
 
@@ -32,17 +48,11 @@ and register it from `cli.py`.
 
 Two helpers worth knowing:
 
-* `csource` — locate, read, and rewrite `static const ... kName[]`
+* `csource` locates, reads, and rewrites `static const ... kName[]`
   arrays. PEM string arrays and hex byte arrays are both supported for
   reading; only PEM is written.
-* `cert_util` — cert/CRL/key builders plus `cert_from_c` /
+* `cert_util` provides cert/CRL/key builders plus `cert_from_c` /
   `update_cert_in_c` bridges.
 
 Per-tool constants (DNs, validity windows, serials) stay in the tool's
 own module.
-
-## pem-to-c
-
-Format a PEM file as a C declaration, for one-off pasting:
-
-    uv run ossl-test-tools pem-to-c some.pem --name kSomething

test-tools/ossl_test_tools/cli.py

@@ -14,7 +14,7 @@
 
 import argparse
 
-from . import crltest, pem
+from . import crltest, ocsptest, pem
 
 
 def main(argv=None):
@@ -25,6 +25,7 @@ def main(argv=None):
     sub = parser.add_subparsers(dest="cmd", required=True)
 
     crltest.register(sub)
+    ocsptest.register(sub)
     pem.register(sub)
 
     args = parser.parse_args(argv)

test-tools/ossl_test_tools/ocsptest/__init__.py

@@ -0,0 +1,35 @@
+# Copyright 2026 The OpenSSL Project Authors. All Rights Reserved.
+#
+# Licensed under the Apache License 2.0 (the "License").  You may not use
+# this file except in compliance with the License.  You can obtain a copy
+# in the file LICENSE in the source distribution or at
+# https://www.openssl.org/source/license.html
+
+"""Generators for the artifacts in test/ocsptest.c.
+
+Each subcommand writes its outputs back into the C source file, replacing
+the existing kXxx[] declarations by variable name.
+"""
+
+from pathlib import Path
+
+from . import pki
+
+
+def _all_cmd(args):
+    pki.build(args.source)
+    print(f"regenerated all OCSP artifacts in {args.source}")
+
+
+def register(subparsers):
+    parent = subparsers.add_parser(
+        "ocsptest",
+        help="Regenerate artifacts in test/ocsptest.c.",
+    )
+    sub = parent.add_subparsers(dest="ocsptest_cmd", required=True)
+
+    pki.register(sub)
+
+    p = sub.add_parser("all", help="Run all OCSP artifact generators.")
+    p.add_argument("--source", type=Path, required=True, help="Path to ocsptest.c")
+    p.set_defaults(func=_all_cmd)

test-tools/ossl_test_tools/ocsptest/pki.py

@@ -0,0 +1,117 @@
+# Copyright 2026 The OpenSSL Project Authors. All Rights Reserved.
+#
+# Licensed under the Apache License 2.0 (the "License").  You may not use
+# this file except in compliance with the License.  You can obtain a copy
+# in the file LICENSE in the source distribution or at
+# https://www.openssl.org/source/license.html
+
+"""PKI for test/ocsptest.c.
+
+  kOcspTestRoot     self-signed root CA, trust anchor and OCSP responder
+  kOcspTestRootKey  the root CA private key, used to sign OCSP responses
+  kOcspTestLeaf     leaf issued by the root CA
+
+The chain is flat (no intermediate) so the root is the leaf's issuer and
+therefore its authorized OCSP responder. Validity windows are long because
+the verification path checks OCSP response validity against the wall clock.
+"""
+
+import datetime
+from pathlib import Path
+
+from cryptography import x509
+from cryptography.hazmat.primitives import hashes
+from cryptography.x509.oid import ExtendedKeyUsageOID
+
+from .. import cert_util
+
+UTC = datetime.timezone.utc
+NOT_BEFORE = datetime.datetime(2026, 1, 1, 0, 0, 0, tzinfo=UTC)
+NOT_AFTER = datetime.datetime(2126, 1, 1, 0, 0, 0, tzinfo=UTC)
+
+ROOT_DN = cert_util.name(
+    "US", "California", "San Francisco",
+    "Example Corp", "Certificate Authority",
+    "Example Corp OCSP Test Root CA",
+)
+LEAF_DN = cert_util.name(
+    "US", "California", "San Francisco",
+    "Example Corp", "Web Services",
+    "ocsp-leaf.example.com",
+)
+
+
+def _ca_key_usage():
+    return x509.KeyUsage(
+        digital_signature=True, content_commitment=False,
+        key_encipherment=False, data_encipherment=False, key_agreement=False,
+        key_cert_sign=True, crl_sign=True,
+        encipher_only=False, decipher_only=False)
+
+
+def _leaf_key_usage():
+    return x509.KeyUsage(
+        digital_signature=True, content_commitment=False,
+        key_encipherment=True, data_encipherment=False, key_agreement=False,
+        key_cert_sign=False, crl_sign=False,
+        encipher_only=False, decipher_only=False)
+
+
+def build(source_path):
+    root_key = cert_util.new_rsa_key()
+    root = (
+        x509.CertificateBuilder()
+        .subject_name(ROOT_DN)
+        .issuer_name(ROOT_DN)
+        .public_key(root_key.public_key())
+        .serial_number(0x1)
+        .not_valid_before(NOT_BEFORE)
+        .not_valid_after(NOT_AFTER)
+        .add_extension(x509.BasicConstraints(ca=True, path_length=0), critical=True)
+        .add_extension(_ca_key_usage(), critical=True)
+        .add_extension(
+            x509.SubjectKeyIdentifier.from_public_key(root_key.public_key()),
+            critical=False)
+        .sign(private_key=root_key, algorithm=hashes.SHA256())
+    )
+
+    leaf_key = cert_util.new_rsa_key()
+    leaf = (
+        x509.CertificateBuilder()
+        .subject_name(LEAF_DN)
+        .issuer_name(ROOT_DN)
+        .public_key(leaf_key.public_key())
+        .serial_number(0x1000)
+        .not_valid_before(NOT_BEFORE)
+        .not_valid_after(NOT_AFTER)
+        .add_extension(x509.BasicConstraints(ca=False, path_length=None), critical=True)
+        .add_extension(_leaf_key_usage(), critical=True)
+        .add_extension(
+            x509.ExtendedKeyUsage([ExtendedKeyUsageOID.SERVER_AUTH]), critical=False)
+        .add_extension(
+            x509.SubjectKeyIdentifier.from_public_key(leaf_key.public_key()),
+            critical=False)
+        .add_extension(cert_util.akid_from_cert(root), critical=False)
+        .add_extension(
+            x509.SubjectAlternativeName([x509.DNSName("ocsp-leaf.example.com")]),
+            critical=False)
+        .sign(private_key=root_key, algorithm=hashes.SHA256())
+    )
+
+    cert_util.update_cert_in_c(source_path, "kOcspTestRoot", root)
+    cert_util.update_key_in_c(source_path, "kOcspTestRootKey", root_key)
+    cert_util.update_cert_in_c(source_path, "kOcspTestLeaf", leaf)
+
+
+def _cmd(args):
+    build(args.source)
+    print(f"updated kOcspTestRoot kOcspTestRootKey kOcspTestLeaf in {args.source}")
+
+
+def register(sub):
+    p = sub.add_parser(
+        "pki",
+        help="Regenerate the root CA, root key, and leaf.",
+    )
+    p.add_argument("--source", type=Path, required=True, help="Path to ocsptest.c")
+    p.set_defaults(func=_cmd)