feat: SAS-R0 boot-time capability attestation - unimplemented feature blocks boot

- attest.c: subsystems report readiness, attest_check() before DSK handoff - FUCK [attest] require_<name>=1 (default) + not-ready -> lotus panic with feature errcode - wired: sealed_mem/pckc/sched/drr/fs_fat32_rw/net_wired + placeholders (pkg/brand/dkm/nvme/virtio/wlan/vmx/drr_real_mac) - negative test: require_pkg=1 -> boot-time PKG-E10 panic (verified); dev/release FUCK whitelist = STATUS.md undone items - CLAUDE.md whitelist rule updated
2026-10-04 21:34:50 +08:00
parent 25fbabe368
commit 87d532df01
9 changed files with 291 additions and 3 deletions
@@ -0,0 +1,123 @@
+/* attest.c — SAS-R0 启动期能力证明（boot-time feature attestation）
+ *
+ * "设计已定的能力没好 = 启动即 panic"，不是"调用才 panic"。
+ * 各子系统在初始化完成点 attest_report()；内核交接 DSK 前
+ * attest_check() 统一核查 FUCK [attest] 的 require_<name>。
+ *
+ * require 默认值 = 1（必备）：能力没好就必须 panic，绝不带病前进。
+ * 仅当某构建环境明确不具备该能力（如 QEMU 无 wlan）时，才在
+ * FUCK [attest] 显式写 require_<name>=0——这是设计内白名单，
+ * 必须在 CLAUDE.md §3 有对应条目。
+ */
+#include <utsm/attest.h>
+#include <utsm/panic.h>
+#include <utsm/log.h>
+#include "../kernel/ini_parser.h"
+
+#define ATTEST_MAX_FEATURES 32
+#define ATTEST_NAME_LEN 28
+#define ATTEST_CODE_LEN 20
+
+typedef struct {
+    char name[ATTEST_NAME_LEN];
+    char errcode[ATTEST_CODE_LEN];
+    int ready;
+    int reported;
+} attest_feature;
+
+static attest_feature g_features[ATTEST_MAX_FEATURES];
+static u32 g_feature_count;
+
+static attest_feature *attest_find(const char *name) {
+    for (u32 i = 0; i < g_feature_count; i++) {
+        const char *a = g_features[i].name;
+        const char *b = name;
+        while (*a && *b && *a == *b) { a++; b++; }
+        if (*a == *b) return &g_features[i];
+    }
+    return 0;
+}
+
+void attest_report(const char *name, const char *errcode, int ready) {
+    if (!name || !errcode) return;
+    attest_feature *f = attest_find(name);
+    if (!f) {
+        if (g_feature_count >= ATTEST_MAX_FEATURES) {
+            log_error("[ATTEST] feature table full, dropping");
+            log_error(name);
+            return;
+        }
+        f = &g_features[g_feature_count++];
+        /* 手工 strncpy（freestanding） */
+        u32 i = 0;
+        for (; name[i] && i < ATTEST_NAME_LEN - 1; i++) f->name[i] = name[i];
+        f->name[i] = 0;
+        i = 0;
+        for (; errcode[i] && i < ATTEST_CODE_LEN - 1; i++) f->errcode[i] = errcode[i];
+        f->errcode[i] = 0;
+        f->reported = 0;
+    }
+    f->ready = ready ? 1 : 0;
+    f->reported = 1;
+}
+
+void attest_report_ready(const char *name, const char *errcode) {
+    attest_report(name, errcode, 1);
+}
+
+u32 attest_missing_count(void) {
+    u32 n = 0;
+    for (u32 i = 0; i < g_feature_count; i++)
+        if (!g_features[i].ready) n++;
+    return n;
+}
+
+void attest_check(const void *cfg) {
+    log_info("[ATTEST] boot-time capability check begin");
+
+    /* 先串口列出全部缺失项（panic 屏只显示第一个，日志要全） */
+    u32 missing = 0;
+    for (u32 i = 0; i < g_feature_count; i++) {
+        const attest_feature *f = &g_features[i];
+        if (f->ready) continue;
+        missing++;
+        log_error("[ATTEST] MISSING:");
+        log_error(f->name);
+        log_error(f->errcode);
+    }
+    log_hex64("[ATTEST] features=", g_feature_count);
+    log_hex64("[ATTEST] missing=", missing);
+
+    if (missing == 0) {
+        log_info("[ATTEST] all capabilities ready");
+        return;
+    }
+
+    /* 逐项判断是否必备（require_<name> 默认 1）：
+     * 全部缺失项中只要有一项必备 → panic（错误码取第一个必备缺失项） */
+    const attest_feature *first_required_missing = 0;
+    for (u32 i = 0; i < g_feature_count; i++) {
+        const attest_feature *f = &g_features[i];
+        if (f->ready) continue;
+        char key[48];
+        u32 p = 0;
+        const char *pre = "require_";
+        while (*pre) key[p++] = *pre++;
+        u32 j = 0;
+        for (; f->name[j] && p < sizeof(key) - 1; j++) key[p++] = f->name[j];
+        key[p] = 0;
+        /* ini key 小写；name 约定即小写（register 侧保证） */
+        if (ini_get_bool(cfg, "attest", key, 1)) {
+            first_required_missing = f;
+            break;
+        }
+    }
+
+    if (first_required_missing) {
+        panic_full(first_required_missing->errcode,
+                   "required capability not ready at boot (attestation)", 0);
+    }
+
+    /* 全部缺失项均被 FUCK 显式豁免（设计内白名单），放行 */
+    log_warn("[ATTEST] missing capabilities exempted by FUCK [attest]");
+}