[PATCH] tests: add functional tests for ECB mode using various ciphers

[Srish Srinivasan <ssrish@linux.ibm.com>]

Add functional tests covering ECB mode for the following
ciphers: des, 3des, aes, blowfish, cast5, and camellia

Signed-off-by: Srish Srinivasan <ssrish@linux.ibm.com>
---
 docs/grub.texi                        |   6 +
 grub-core/Makefile.core.def           |   5 +
 grub-core/tests/ecb_test.c            | 283 ++++++++++++++++++++++++++
 grub-core/tests/lib/functional_test.c |   1 +
 4 files changed, 295 insertions(+)
 create mode 100644 grub-core/tests/ecb_test.c

diff --git a/docs/grub.texi b/docs/grub.texi
index 7181009b6..f90eb992d 100644
--- a/docs/grub.texi
+++ b/docs/grub.texi
@@ -4092,6 +4092,7 @@ Modules can be loaded via the @command{insmod} (@pxref{insmod}) command.
 * dm_nv_module::
 * drivemap_module::
 * dsa_sexp_test_module::
+* ecb_test_module::
 * echo_module::
 * efi_gop_module::
 * efi_uga_module::
@@ -4677,6 +4678,11 @@ mappings. @xref{drivemap} for more information.
 @section dsa_sexp_test
 This module provides a test of the libgcrypt DSA functionality in GRUB.
 
+@node ecb_test_module
+@section ecb_test
+This module is intended for performing a functional test of the ecb
+mode of operation for various ciphers in GRUB.
+
 @node echo_module
 @section echo
 This module provides support for the @command{echo} to display a line of text.
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index fa4bc54aa..de0e857eb 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -2272,6 +2272,11 @@ module = {
   common = tests/argon2_test.c;
 };
 
+module = {
+  name = ecb_test;
+  common = tests/ecb_test.c;
+};
+
 module = {
   name = legacy_password_test;
   common = tests/legacy_password_test.c;
diff --git a/grub-core/tests/ecb_test.c b/grub-core/tests/ecb_test.c
new file mode 100644
index 000000000..b92e0d619
--- /dev/null
+++ b/grub-core/tests/ecb_test.c
@@ -0,0 +1,283 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2025 Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB 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 GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/test.h>
+#include <grub/dl.h>
+#include <grub/misc.h>
+#include <grub/crypto.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static struct
+{
+  const char *cipher;
+  const char *key;
+  unsigned int keylen;
+  const char *ptext;
+  unsigned int plen;
+  const char *ctext;
+} vectors[] = {
+  {
+    "des",
+    "\x01\x23\x45\x67\x89\xab\xcd\xef",
+    8,
+    "\x01\x23\x45\x67\x89\xab\xcd\xe7"
+    "\x22\x33\x44\x55\x66\x77\x88\x99"
+    "\xca\xfe\xba\xbe\xfe\xed\xbe\xef",
+    24,
+    "\xc9\x57\x44\x25\x6a\x5e\xd3\x1d"
+    "\xf7\x9c\x89\x2a\x33\x8f\x4a\x8b"
+    "\xb4\x99\x26\xf7\x1f\xe1\xd4\x90",
+  },
+  {
+    "3des",
+    "\x01\x23\x45\x67\x89\xab\xcd\xef"
+    "\x55\x55\x55\x55\x55\x55\x55\x55"
+    "\xfe\xdc\xba\x98\x76\x54\x32\x10",
+    24,
+    "\x73\x6f\x6d\x65\x64\x61\x74\x61",
+    8,
+    "\x18\xd7\x48\xe5\x63\x62\x05\x72",
+  },
+  {
+    "aes",
+    "\x00\x01\x02\x03\x04\x05\x06\x07"
+    "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
+    16,
+    "\x00\x11\x22\x33\x44\x55\x66\x77"
+    "\x88\x99\xaa\xbb\xcc\xdd\xee\xff",
+    16,
+    "\x69\xc4\xe0\xd8\x6a\x7b\x04\x30"
+    "\xd8\xcd\xb7\x80\x70\xb4\xc5\x5a",
+  },
+  {
+    "aes",
+    "\x00\x01\x02\x03\x04\x05\x06\x07"
+    "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
+    "\x10\x11\x12\x13\x14\x15\x16\x17",
+    24,
+    "\x00\x11\x22\x33\x44\x55\x66\x77"
+    "\x88\x99\xaa\xbb\xcc\xdd\xee\xff",
+    16,
+    "\xdd\xa9\x7c\xa4\x86\x4c\xdf\xe0"
+    "\x6e\xaf\x70\xa0\xec\x0d\x71\x91",
+  },
+  {
+    "aes",
+    "\x00\x01\x02\x03\x04\x05\x06\x07"
+    "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
+    "\x10\x11\x12\x13\x14\x15\x16\x17"
+    "\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f",
+    32,
+    "\x00\x11\x22\x33\x44\x55\x66\x77"
+    "\x88\x99\xaa\xbb\xcc\xdd\xee\xff",
+    16,
+    "\x8e\xa2\xb7\xca\x51\x67\x45\xbf"
+    "\xea\xfc\x49\x90\x4b\x49\x60\x89",
+  },
+  {
+    "blowfish",
+    "\xf0\xe1\xd2\xc3\xb4\xa5\x96\x87",
+    8,
+    "\xfe\xdc\xba\x98\x76\x54\x32\x10",
+    8,
+    "\xe8\x7a\x24\x4e\x2c\xc8\x5e\x82",
+  },
+  {
+    "blowfish",
+    "\xf0\xe1\xd2\xc3\xb4\xa5\x96\x87"
+    "\x78\x69\x5a\x4b\x3c\x2d\x1e\x0f",
+    16,
+    "\xfe\xdc\xba\x98\x76\x54\x32\x10",
+    8,
+    "\x93\x14\x28\x87\xee\x3b\xe1\x5c",
+  },
+  {
+    "blowfish",
+    "\xf0\xe1\xd2\xc3\xb4\xa5\x96\x87"
+    "\x78\x69\x5a\x4b\x3c\x2d\x1e\x0f"
+    "\x00\x11\x22\x33\x44",
+    21,
+    "\xfe\xdc\xba\x98\x76\x54\x32\x10",
+    8,
+    "\xe6\xf5\x1e\xd7\x9b\x9d\xb2\x1f",
+  },
+  {
+    "blowfish",
+    "\xf0\xe1\xd2\xc3\xb4\xa5\x96\x87"
+    "\x78\x69\x5a\x4b\x3c\x2d\x1e\x0f"
+    "\x00\x11\x22\x33\x44\x55\x66\x77"
+    "\x04\x68\x91\x04\xc2\xfd\x3b\x2f"
+    "\x58\x40\x23\x64\x1a\xba\x61\x76"
+    "\x1f\x1f\x1f\x1f\x0e\x0e\x0e\x0e"
+    "\xff\xff\xff\xff\xff\xff\xff\xff",
+    56,
+    "\xfe\xdc\xba\x98\x76\x54\x32\x10",
+    8,
+    "\xc0\x45\x04\x01\x2e\x4e\x1f\x53",
+  },
+  {
+    "cast5",
+    "\x01\x23\x45\x67\x12\x34\x56\x78"
+    "\x23\x45\x67\x89\x34\x56\x78\x9a",
+    16,
+    "\x01\x23\x45\x67\x89\xab\xcd\xef",
+    8,
+    "\x23\x8b\x4f\xe5\x84\x7e\x44\xb2",
+  },
+  {
+    "cast5",
+    "\x01\x23\x45\x67\x12\x34\x56\x78"
+    "\x23\x45\x00\x00\x00\x00\x00\x00",
+    16,
+    "\x01\x23\x45\x67\x89\xab\xcd\xef",
+    8,
+    "\x75\x3d\xe2\x9f\x5d\x16\x7d\x03",
+  },
+  {
+    "camellia128",
+    "\x01\x23\x45\x67\x89\xab\xcd\xef"
+    "\xfe\xdc\xba\x98\x76\x54\x32\x10",
+    16,
+    "\x01\x23\x45\x67\x89\xab\xcd\xef"
+    "\xfe\xdc\xba\x98\x76\x54\x32\x10",
+    16,
+    "\x67\x67\x31\x38\x54\x96\x69\x73"
+    "\x08\x57\x06\x56\x48\xea\xbe\x43",
+  },
+  {
+    "camellia192",
+    "\x01\x23\x45\x67\x89\xab\xcd\xef"
+    "\xfe\xdc\xba\x98\x76\x54\x32\x10"
+    "\x00\x11\x22\x33\x44\x55\x66\x77",
+    24,
+    "\x01\x23\x45\x67\x89\xab\xcd\xef"
+    "\xfe\xdc\xba\x98\x76\x54\x32\x10",
+    16,
+    "\xb4\x99\x34\x01\xb3\xe9\x96\xf8"
+    "\x4e\xe5\xce\xe7\xd7\x9b\x09\xb9",
+  },
+  {
+    "camellia256",
+    "\x01\x23\x45\x67\x89\xab\xcd\xef"
+    "\xfe\xdc\xba\x98\x76\x54\x32\x10"
+    "\x00\x11\x22\x33\x44\x55\x66\x77"
+    "\x88\x99\xaa\xbb\xcc\xdd\xee\xff",
+    32,
+    "\x01\x23\x45\x67\x89\xab\xcd\xef"
+    "\xfe\xdc\xba\x98\x76\x54\x32\x10",
+    16,
+    "\x9a\xcc\x23\x7d\xff\x16\xd7\x6c"
+    "\x20\xef\x7c\x91\x9e\x3a\x75\x09",
+  },
+};
+
+static void
+ecb_test (void)
+{
+  grub_size_t i;
+
+  for (i = 0; i < ARRAY_SIZE (vectors); i++)
+    {
+      gcry_err_code_t err;
+      unsigned char *plaintext, *ciphertext;
+      int rc;
+
+      const gcry_cipher_spec_t *cipher = grub_crypto_lookup_cipher_by_name (vectors[i].cipher);
+      grub_test_assert (cipher != NULL, "cipher lookup failed for vector %ld (cipher: %s)", i+1,
+                        vectors[i].cipher);
+      if (cipher == NULL)
+        return;
+
+      grub_crypto_cipher_handle_t handle = grub_crypto_cipher_open (cipher);
+      grub_test_assert (handle != NULL, "cipher handle opening failed for vector %ld (cipher: %s)",
+                        i+1, vectors[i].cipher);
+      if (handle == NULL)
+        return;
+
+      err = grub_crypto_cipher_set_key (handle, (grub_uint8_t *)vectors[i].key, vectors[i].keylen);
+      grub_test_assert (err == GPG_ERR_NO_ERROR,
+                        "setting key of length %d failed for vector %ld (cipher: %s)",
+                        vectors[i].keylen, i+1, vectors[i].cipher);
+      if (err != GPG_ERR_NO_ERROR)
+        {
+          grub_crypto_cipher_close(handle);
+          return;
+        }
+
+      /* Test Encryption  */
+      ciphertext = grub_zalloc (vectors[i].plen);
+      grub_test_assert (ciphertext != NULL,
+                        "ciphertext buffer allocation failed for vector %ld (cipher: %s)", i+1,
+                        vectors[i].cipher);
+      if (ciphertext == NULL)
+        {
+          grub_crypto_cipher_close(handle);
+          return;
+        }
+
+      err = grub_crypto_ecb_encrypt (handle, ciphertext, vectors[i].ptext, vectors[i].plen);
+      grub_test_assert (err == GPG_ERR_NO_ERROR,
+                        "ecb encryption failed for vector %ld (cipher: %s)", i+1,
+                        vectors[i].cipher);
+      if (err != GPG_ERR_NO_ERROR)
+        {
+          grub_crypto_cipher_close(handle);
+          grub_free(ciphertext);
+          return;
+        }
+
+      rc = grub_memcmp (ciphertext, vectors[i].ctext, vectors[i].plen);
+      grub_test_assert (rc == 0, "ciphertext mismatch after encryption for vector %ld (cipher: %s)",
+                        i+1, vectors[i].cipher);
+
+      grub_free(ciphertext);
+
+      /* Test Decryption  */
+      plaintext = grub_zalloc (vectors[i].plen);
+      grub_test_assert (plaintext != NULL,
+                        "plaintext buffer allocation failed for vector %ld (cipher: %s)", i+1,
+                        vectors[i].cipher);
+      if (plaintext == NULL)
+        {
+          grub_crypto_cipher_close(handle);
+          return;
+        }
+
+      err = grub_crypto_ecb_decrypt (handle, plaintext, vectors[i].ctext, vectors[i].plen);
+      grub_test_assert (err == GPG_ERR_NO_ERROR,
+                        "ecb decryption failed for vector %ld (cipher: %s)", i+1,
+                        vectors[i].cipher);
+      if (err != GPG_ERR_NO_ERROR)
+        {
+          grub_crypto_cipher_close(handle);
+          grub_free(plaintext);
+          return;
+        }
+
+      rc = grub_memcmp (plaintext, vectors[i].ptext, vectors[i].plen);
+      grub_test_assert (rc == 0, "plaintext mismatch after decryption for vector %ld (cipher: %s)",
+                        i+1, vectors[i].cipher);
+
+      grub_free(plaintext);
+      grub_crypto_cipher_close(handle);
+    }
+}
+
+/* Register example_test method as a functional test.  */
+GRUB_FUNCTIONAL_TEST (ecb_test, ecb_test);
diff --git a/grub-core/tests/lib/functional_test.c b/grub-core/tests/lib/functional_test.c
index 776934e1f..b3cc5f5ce 100644
--- a/grub-core/tests/lib/functional_test.c
+++ b/grub-core/tests/lib/functional_test.c
@@ -82,6 +82,7 @@ grub_functional_all_tests (grub_extcmd_context_t ctxt __attribute__ ((unused)),
   grub_dl_load ("shift_test");
   grub_dl_load ("asn1_test");
   grub_dl_load ("argon2_test");
+  grub_dl_load ("ecb_test");
 
   FOR_LIST_ELEMENTS (test, grub_test_list)
     ok = !grub_test_run (test) && ok;
-- 
2.43.0


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