iccard/aime.c: Add (incomplete) AiMe card formatter

iccard/aime.c

@@ -0,0 +1,47 @@
+#include <assert.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include "iccard/aime.h"
+#include "iccard/mifare.h"
+
+#include "util/dprintf.h"
+
+HRESULT aime_card_populate(
+        struct mifare *mifare,
+        const uint8_t *luid,
+        size_t nbytes)
+{
+    uint8_t b;
+    size_t i;
+
+    assert(mifare != NULL);
+    assert(luid != NULL);
+
+    memset(mifare, 0, sizeof(*mifare));
+
+    if (nbytes != 10) {
+        dprintf("AiMe IC: LUID must be 10 bytes\n");
+
+        return E_INVALIDARG;
+    }
+
+    for (i = 0 ; i < 10 ; i++) {
+        b = luid[i];
+
+        if ((b & 0xF0) > 0x90 || (b & 0x0F) > 0x09) {
+            dprintf("AiMe IC: LUID must be binary-coded decimal\n");
+            return E_INVALIDARG;
+        }
+
+        mifare->sectors[0].blocks[2].bytes[6 + i] = b;
+    }
+
+    /* TODO An authentic Aime pass has a checksum of the LUID in the last few
+       bytes of block 1. The output of this function fails authenticity check
+       in its current form. */
+
+    dprintf("AiMe IC: WARNING: Authenticity hash not yet implemented!\n");
+
+    return S_OK;
+}

iccard/aime.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <windows.h>
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "iccard/mifare.h"
+
+HRESULT aime_card_populate(
+        struct mifare *mifare,
+        const uint8_t *luid,
+        size_t nbytes);

iccard/meson.build

@@ -7,6 +7,8 @@ iccard_lib = static_library(
         capnhook.get_variable('hook_dep'),
     ],
     sources : [
+        'aime.c',
+        'aime.h',
         'felica.c',
         'felica.h',
         'mifare.h',