Import gcrypt public-key cryptography and implement signature checking.

grub-core/lib/libgcrypt_wrap/mem.c

@@ -0,0 +1,112 @@
+#include <grub/gcrypt/gcrypt.h>
+#include <grub/gcrypt/gpg-error.h>
+#include <grub/term.h>
+#include <grub/crypto.h>
+#include <grub/dl.h>
+#include <grub/env.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+void *
+gcry_malloc (size_t n)
+{
+  return grub_malloc (n);
+}
+
+void *
+gcry_malloc_secure (size_t n)
+{
+  return grub_malloc (n);
+}
+
+void
+gcry_free (void *a)
+{
+  grub_free (a);
+}
+
+int
+gcry_is_secure (const void *a __attribute__ ((unused)))
+{
+  return 0;
+}
+
+/* FIXME: implement "exit".  */
+void *
+gcry_xcalloc (size_t n, size_t m)
+{
+  return grub_zalloc (n * m);
+}
+
+void *
+gcry_xmalloc_secure (size_t n)
+{
+  return grub_malloc (n);
+}
+
+void *
+gcry_xcalloc_secure (size_t n, size_t m)
+{
+  return grub_zalloc (n * m);
+}
+
+void *
+gcry_xmalloc (size_t n)
+{
+  return grub_malloc (n);
+}
+
+void *
+gcry_xrealloc (void *a, size_t n)
+{
+  return grub_realloc (a, n);
+}
+
+void
+_gcry_check_heap (const void *a __attribute__ ((unused)))
+{
+
+}
+
+void _gcry_log_printf (const char *fmt, ...)
+{
+  va_list args;
+  const char *debug = grub_env_get ("debug");
+
+  if (! debug)
+    return;
+
+  if (grub_strword (debug, "all") || grub_strword (debug, "gcrypt"))
+    {
+      grub_printf ("gcrypt: ");
+      va_start (args, fmt);
+      grub_vprintf (fmt, args);
+      va_end (args);
+      grub_refresh ();
+    }
+}
+
+void _gcry_log_bug (const char *fmt, ...)
+{
+  va_list args;
+
+  grub_printf ("gcrypt bug: ");
+  va_start (args, fmt);
+  grub_vprintf (fmt, args);
+  va_end (args);
+  grub_refresh ();
+}
+
+gcry_err_code_t
+gpg_error_from_syserror (void)
+{
+  switch (grub_errno)
+    {
+    case GRUB_ERR_NONE:
+      return GPG_ERR_NO_ERROR;
+    case GRUB_ERR_OUT_OF_MEMORY:
+      return GPG_ERR_OUT_OF_MEMORY;
+    default:
+      return GPG_ERR_GENERAL;
+    }
+}