lib: Add SLH-DSA tests and per-algorithm PQC gating

This replaces the single HAVE_OPENSSL_PQC/DISABLE_PQC with
per-algorithm CMake variables (ML-KEM, ML-DSA, SLH-DSA), gated by the
OpenSSL versions: ML-KEM and ML-DSA require >= 3.4, SLH-DSA >= 3.5.

SLH-DSA was already working, but now added explicit authentication
tests for it with a full certificate chain (root CA, intermediate CA,
server) to show full support.

Rename PQC test files and cert headers to use algorithm-specific names
(ml_kem, ml_dsa, slh_dsa) and move cert headers to
include/test/certs/.

Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>

1 files changed, 0 insertions, 447 deletions

diff --git a/src/irmd/oap/tests/oap_test_pqc.c b/src/irmd/oap/tests/oap_test_pqc.c
deleted file mode 100644
index bbaf9f7b..00000000
--- a/src/irmd/oap/tests/oap_test_pqc.c
+++ /dev/null
@@ -1,447 +0,0 @@
-/*
- * Ouroboros - Copyright (C) 2016 - 2026
- *
- * Unit tests of OAP post-quantum key exchange
- *
- *    Dimitri Staessens <dimitri@ouroboros.rocks>
- *    Sander Vrijders   <sander@ouroboros.rocks>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., http://www.fsf.org/about/contact/.
- */
-
-#if defined(__linux__) || defined(__CYGWIN__)
-#define _DEFAULT_SOURCE
-#else
-#define _POSIX_C_SOURCE 200809L
-#endif
-
-#include "config.h"
-
-#include <ouroboros/crypt.h>
-#include <ouroboros/flow.h>
-#include <ouroboros/name.h>
-#include <ouroboros/random.h>
-#include <test/test.h>
-
-#include <test/certs_pqc.h>
-
-#include "oap.h"
-#include "common.h"
-
-#include <stdbool.h>
-#include <string.h>
-
-#ifdef HAVE_OPENSSL
-#include <openssl/evp.h>
-#endif
-
-#define CLI_AUTH    1
-#define NO_CLI_AUTH 0
-#define CLI_ENCAP   KEM_MODE_CLIENT_ENCAP
-#define SRV_ENCAP   KEM_MODE_SERVER_ENCAP
-
-extern const uint16_t kex_supported_nids[];
-extern const uint16_t md_supported_nids[];
-
-static int get_random_kdf(void)
-{
-        static int idx = 0;
-        int        count;
-
-        if (md_supported_nids[0] == NID_undef)
-                return NID_undef;
-
-        for (count = 0; md_supported_nids[count] != NID_undef; count++)
-                ;
-
-        return md_supported_nids[(idx++) % count];
-}
-
-struct test_cfg test_cfg;
-
-/* KEM keypair storage for tests (server-side keypair for KEM modes) */
-static void *   test_kem_pkp    = NULL;  /* Private key pair  */
-static uint8_t  test_kem_pk[4096];       /* Public key buffer */
-static size_t   test_kem_pk_len = 0;
-
-/* Mock load - called by load_*_credentials in common.c */
-int mock_load_credentials(void ** pkp,
-                          void ** crt)
-{
-        *pkp = NULL;
-        *crt = NULL;
-
-        if (crypt_load_privkey_str(server_pkp_ml, pkp) < 0)
-                return -1;
-
-        if (crypt_load_crt_str(signed_server_crt_ml, crt) < 0) {
-                crypt_free_key(*pkp);
-                *pkp = NULL;
-                return -1;
-        }
-
-        return 0;
-}
-
-int load_server_kem_keypair(const char * name,
-                            bool         raw_fmt,
-                            void **      pkp)
-{
-#ifdef HAVE_OPENSSL
-        struct sec_config local_cfg;
-        ssize_t           pk_len;
-
-        (void) name;
-        (void) raw_fmt;
-
-        /*
-        * Uses reference counting. The caller will call
-        * EVP_PKEY_free which decrements the count.
-        */
-        if (test_kem_pkp != NULL) {
-                if (EVP_PKEY_up_ref((EVP_PKEY *)test_kem_pkp) != 1)
-                        return -1;
-
-                *pkp = test_kem_pkp;
-                return 0;
-        }
-
-        /*
-         * Generate a new KEM keypair from test_cfg.srv.kex.
-         */
-        memset(&local_cfg, 0, sizeof(local_cfg));
-        if (test_cfg.srv.kex == NID_undef)
-                goto fail;
-
-        SET_KEX_ALGO_NID(&local_cfg, test_cfg.srv.kex);
-
-        pk_len = kex_pkp_create(&local_cfg, &test_kem_pkp, test_kem_pk);
-        if (pk_len < 0)
-                goto fail;
-
-        test_kem_pk_len = (size_t) pk_len;
-
-        if (EVP_PKEY_up_ref((EVP_PKEY *)test_kem_pkp) != 1)
-                goto fail_ref;
-
-        *pkp = test_kem_pkp;
-
-        return 0;
- fail_ref:
-        kex_pkp_destroy(test_kem_pkp);
-        test_kem_pkp = NULL;
-        test_kem_pk_len = 0;
- fail:
-        return -1;
-
-#else
-        (void) name;
-        (void) raw_fmt;
-        (void) pkp;
-        return -1;
-#endif
-}
-
-int load_server_kem_pk(const char *        name,
-                       struct sec_config * cfg,
-                       buffer_t *          pk)
-{
-        ssize_t len;
-
-        (void) name;
-
-        if (test_kem_pk_len > 0) {
-                pk->data = malloc(test_kem_pk_len);
-                if (pk->data == NULL)
-                        return -1;
-                memcpy(pk->data, test_kem_pk, test_kem_pk_len);
-                pk->len = test_kem_pk_len;
-                return 0;
-        }
-
-        /* Generate keypair on demand if not already done */
-        len = kex_pkp_create(cfg, &test_kem_pkp, test_kem_pk);
-        if (len < 0)
-                return -1;
-
-        test_kem_pk_len = (size_t) len;
-        pk->data = malloc(test_kem_pk_len);
-        if (pk->data == NULL)
-                return -1;
-        memcpy(pk->data, test_kem_pk, test_kem_pk_len);
-        pk->len = test_kem_pk_len;
-
-        return 0;
-}
-
-static void reset_kem_state(void)
-{
-        if (test_kem_pkp != NULL) {
-                kex_pkp_destroy(test_kem_pkp);
-                test_kem_pkp = NULL;
-        }
-        test_kem_pk_len = 0;
-}
-
-static void test_cfg_init(int  kex,
-                          int  cipher,
-                          int  kdf,
-                          int  kem_mode,
-                          bool cli_auth)
-{
-        memset(&test_cfg, 0, sizeof(test_cfg));
-
-        /* Server config */
-        test_cfg.srv.kex      = kex;
-        test_cfg.srv.cipher   = cipher;
-        test_cfg.srv.kdf      = kdf;
-        test_cfg.srv.kem_mode = kem_mode;
-        test_cfg.srv.auth     = true;
-
-        /* Client config */
-        test_cfg.cli.kex      = kex;
-        test_cfg.cli.cipher   = cipher;
-        test_cfg.cli.kdf      = kdf;
-        test_cfg.cli.kem_mode = kem_mode;
-        test_cfg.cli.auth     = cli_auth;
-}
-
-static int oap_test_setup_kem(struct oap_test_ctx * ctx,
-                              const char *          root_ca,
-                              const char *          im_ca)
-{
-        reset_kem_state();
-        return oap_test_setup(ctx, root_ca, im_ca);
-}
-
-static void oap_test_teardown_kem(struct oap_test_ctx * ctx)
-{
-        oap_test_teardown(ctx);
-}
-
-static int test_oap_roundtrip_auth_only(void)
-{
-        test_cfg_init(NID_undef, NID_undef, NID_undef, 0, false);
-
-        return roundtrip_auth_only(root_ca_crt_ml, im_ca_crt_ml);
-}
-
-static int test_oap_corrupted_request(void)
-{
-        test_cfg_init(NID_MLKEM768, NID_aes_256_gcm, get_random_kdf(),
-                      SRV_ENCAP, CLI_AUTH);
-
-        return corrupted_request(root_ca_crt_ml, im_ca_crt_ml);
-}
-
-static int test_oap_corrupted_response(void)
-{
-        test_cfg_init(NID_MLKEM768, NID_aes_256_gcm, get_random_kdf(),
-                      SRV_ENCAP, NO_CLI_AUTH);
-
-        return corrupted_response(root_ca_crt_ml, im_ca_crt_ml);
-}
-
-static int test_oap_truncated_request(void)
-{
-        test_cfg_init(NID_MLKEM768, NID_aes_256_gcm, get_random_kdf(),
-                      SRV_ENCAP, NO_CLI_AUTH);
-
-        return truncated_request(root_ca_crt_ml, im_ca_crt_ml);
-}
-
-static int test_oap_roundtrip_kem(int kex,
-                                  int kem_mode)
-{
-        struct oap_test_ctx ctx;
-        const char *        kex_str  = kex_nid_to_str(kex);
-        const char *        mode_str = kem_mode == CLI_ENCAP ? "cli" : "srv";
-
-        test_cfg_init(kex, NID_aes_256_gcm, get_random_kdf(),
-                      kem_mode, NO_CLI_AUTH);
-
-        TEST_START("(%s, %s encaps)", kex_str, mode_str);
-
-        if (oap_test_setup_kem(&ctx, root_ca_crt_ml, im_ca_crt_ml) < 0)
-                goto fail;
-
-        if (oap_cli_prepare_ctx(&ctx) < 0) {
-                printf("Client prepare failed.\n");
-                goto fail_cleanup;
-        }
-
-        if (oap_srv_process_ctx(&ctx) < 0) {
-                printf("Server process failed.\n");
-                goto fail_cleanup;
-        }
-
-        if (oap_cli_complete_ctx(&ctx) < 0) {
-                printf("Client complete failed.\n");
-                goto fail_cleanup;
-        }
-
-        if (memcmp(ctx.cli.key, ctx.srv.key, SYMMKEYSZ) != 0) {
-                printf("Client and server keys do not match!\n");
-                goto fail_cleanup;
-        }
-
-        if (ctx.cli.nid == NID_undef ||
-            ctx.srv.nid == NID_undef) {
-                printf("Cipher not set in flow.\n");
-                goto fail_cleanup;
-        }
-
-        oap_test_teardown_kem(&ctx);
-
-        TEST_SUCCESS("(%s, %s encaps)", kex_str, mode_str);
-        return TEST_RC_SUCCESS;
-
- fail_cleanup:
-        oap_test_teardown_kem(&ctx);
- fail:
-        TEST_FAIL("(%s, %s encaps)", kex_str, mode_str);
-        return TEST_RC_FAIL;
-}
-
-static int test_oap_roundtrip_kem_all(void)
-{
-        int ret = 0;
-        int i;
-
-        for (i = 0; kex_supported_nids[i] != NID_undef; i++) {
-                const char * algo = kex_nid_to_str(kex_supported_nids[i]);
-
-                if (!IS_KEM_ALGORITHM(algo))
-                        continue;
-
-                ret |= test_oap_roundtrip_kem(kex_supported_nids[i], SRV_ENCAP);
-                ret |= test_oap_roundtrip_kem(kex_supported_nids[i], CLI_ENCAP);
-        }
-
-        return ret;
-}
-
-static int test_oap_kem_srv_uncfg(int kex)
-{
-        struct oap_test_ctx ctx;
-        const char *        kex_str = kex_nid_to_str(kex);
-
-        memset(&test_cfg, 0, sizeof(test_cfg));
-
-        /* Server: auth only, no KEX configured */
-        test_cfg.srv.auth = true;
-
-        /* Client: requests KEM with server-side encapsulation */
-        test_cfg.cli.kex      = kex;
-        test_cfg.cli.cipher   = NID_aes_256_gcm;
-        test_cfg.cli.kdf      = get_random_kdf();
-        test_cfg.cli.kem_mode = SRV_ENCAP;
-        test_cfg.cli.auth     = false;
-
-        TEST_START("(%s)", kex_str);
-
-        if (oap_test_setup_kem(&ctx, root_ca_crt_ml,
-                               im_ca_crt_ml) < 0)
-                goto fail;
-
-        if (oap_cli_prepare_ctx(&ctx) < 0) {
-                printf("Client prepare failed.\n");
-                goto fail_cleanup;
-        }
-
-        if (oap_srv_process_ctx(&ctx) < 0) {
-                printf("Server process failed.\n");
-                goto fail_cleanup;
-        }
-
-        if (oap_cli_complete_ctx(&ctx) < 0) {
-                printf("Client complete failed.\n");
-                goto fail_cleanup;
-        }
-
-        if (memcmp(ctx.cli.key, ctx.srv.key, SYMMKEYSZ) != 0) {
-                printf("Client and server keys do not match!\n");
-                goto fail_cleanup;
-        }
-
-        if (ctx.cli.nid == NID_undef ||
-            ctx.srv.nid == NID_undef) {
-                printf("Cipher not set in flow.\n");
-                goto fail_cleanup;
-        }
-
-        oap_test_teardown_kem(&ctx);
-
-        TEST_SUCCESS("(%s)", kex_str);
-        return TEST_RC_SUCCESS;
-
- fail_cleanup:
-        oap_test_teardown_kem(&ctx);
- fail:
-        TEST_FAIL("(%s)", kex_str);
-        return TEST_RC_FAIL;
-}
-
-static int test_oap_kem_srv_uncfg_all(void)
-{
-        int ret = 0;
-        int i;
-
-        for (i = 0; kex_supported_nids[i] != NID_undef; i++) {
-                const char * algo;
-
-                algo = kex_nid_to_str(kex_supported_nids[i]);
-
-                if (!IS_KEM_ALGORITHM(algo))
-                        continue;
-
-                ret |= test_oap_kem_srv_uncfg(kex_supported_nids[i]);
-        }
-
-        return ret;
-}
-
-int oap_test_pqc(int    argc,
-                 char **argv)
-{
-        int ret = 0;
-
-        (void) argc;
-        (void) argv;
-
-#ifdef HAVE_OPENSSL_PQC
-        ret |= test_oap_roundtrip_auth_only();
-
-        ret |= test_oap_roundtrip_kem_all();
-
-        ret |= test_oap_kem_srv_uncfg_all();
-
-        ret |= test_oap_corrupted_request();
-        ret |= test_oap_corrupted_response();
-        ret |= test_oap_truncated_request();
-#else
-        (void) test_oap_roundtrip_auth_only;
-        (void) test_oap_roundtrip_kem;
-        (void) test_oap_roundtrip_kem_all;
-        (void) test_oap_kem_srv_uncfg;
-        (void) test_oap_kem_srv_uncfg_all;
-        (void) test_oap_corrupted_request;
-        (void) test_oap_corrupted_response;
-        (void) test_oap_truncated_request;
-
-        ret = TEST_RC_SKIP;
-#endif
-
-        return ret;
-}