[PATCH v14 05/15] Add DSA and RSA SEXP tests

[Vladimir Serbinenko <phcoder@gmail.com>]

This allows us to test purely the integration of the implementation
of DSA and RSA from libgcrypt without concerning with additional
code.

Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
---
 grub-core/Makefile.core.def     |  16 ++++
 grub-core/tests/dsa_sexp_test.c | 127 ++++++++++++++++++++++++++++++++
 grub-core/tests/rsa_sexp_test.c | 101 +++++++++++++++++++++++++
 3 files changed, 244 insertions(+)
 create mode 100644 grub-core/tests/dsa_sexp_test.c
 create mode 100644 grub-core/tests/rsa_sexp_test.c

diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index 10c307f6c..2d0fce4be 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -2180,6 +2180,22 @@ module = {
   common = tests/setjmp_test.c;
 };
 
+module = {
+  name = dsa_sexp_test;
+  common = tests/dsa_sexp_test.c;
+
+  cflags = '$(CFLAGS_GCRY) -Wno-redundant-decls -Wno-sign-compare';
+  cppflags = '$(CPPFLAGS_GCRY)';
+};
+
+module = {
+  name = rsa_sexp_test;
+  common = tests/rsa_sexp_test.c;
+
+  cflags = '$(CFLAGS_GCRY) -Wno-redundant-decls -Wno-sign-compare';
+  cppflags = '$(CPPFLAGS_GCRY)';
+};
+
 module = {
   name = signature_test;
   common = tests/signature_test.c;
diff --git a/grub-core/tests/dsa_sexp_test.c b/grub-core/tests/dsa_sexp_test.c
new file mode 100644
index 000000000..31600d901
--- /dev/null
+++ b/grub-core/tests/dsa_sexp_test.c
@@ -0,0 +1,127 @@
+/*
+ *  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/crypto.h>
+#include <grub/gcrypt/gcrypt.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+/* Sample DSA public key.  */
+static char pubkey_dump[] = {
+  0x28, 0x31, 0x30, 0x3a, 0x70, 0x75, 0x62, 0x6c,
+  0x69, 0x63, 0x2d, 0x6b, 0x65, 0x79, 0x28, 0x33,
+  0x3a, 0x64, 0x73, 0x61, 0x28, 0x31, 0x3a, 0x70,
+  0x31, 0x32, 0x39, 0x3a, 0x00, 0xc0, 0x50, 0x14,
+  0x4c, 0x97, 0x10, 0x69, 0x07, 0xa7, 0xe9, 0x2b,
+  0xe5, 0xc6, 0x88, 0xe1, 0x6d, 0xd8, 0x38, 0x28,
+  0x09, 0x49, 0x5b, 0xe8, 0xa3, 0x04, 0xb8, 0xc4,
+  0x6e, 0x98, 0xc1, 0xc2, 0xb0, 0x2a, 0xe0, 0xe2,
+  0x1a, 0x30, 0xd2, 0xdb, 0x45, 0x1a, 0x88, 0x80,
+  0x28, 0x24, 0xb0, 0xbf, 0xc2, 0xbd, 0xe9, 0xf6,
+  0x9d, 0xa2, 0x01, 0x94, 0xe6, 0x7f, 0xa0, 0xb6,
+  0xe4, 0x39, 0xfc, 0x54, 0xba, 0x99, 0xb6, 0xbe,
+  0x39, 0xee, 0xa5, 0xd9, 0xa0, 0x35, 0x3c, 0x2d,
+  0x3e, 0x96, 0xc3, 0x96, 0xa5, 0x0d, 0x2b, 0xbf,
+  0x3b, 0xa3, 0xe2, 0xe8, 0x89, 0xed, 0x60, 0xe0,
+  0x43, 0x61, 0xb6, 0x73, 0xf6, 0xa7, 0xb4, 0x56,
+  0x76, 0x04, 0xf7, 0x8b, 0xf1, 0x84, 0xaa, 0x3e,
+  0xe0, 0x08, 0xad, 0xdd, 0xc2, 0x36, 0xfd, 0x3d,
+  0xd0, 0xad, 0xf4, 0x3a, 0x7e, 0x80, 0x8c, 0x52,
+  0x2b, 0x04, 0xa8, 0x03, 0x27, 0x29, 0x28, 0x31,
+  0x3a, 0x71, 0x32, 0x31, 0x3a, 0x00, 0xd5, 0x34,
+  0xd2, 0xc5, 0x1c, 0x26, 0xdf, 0xb0, 0xba, 0x78,
+  0x75, 0xe5, 0xe9, 0x36, 0x6b, 0x04, 0x03, 0xe2,
+  0x57, 0x3f, 0x29, 0x28, 0x31, 0x3a, 0x67, 0x31,
+  0x32, 0x38, 0x3a, 0x3b, 0xa0, 0xac, 0xa3, 0xa1,
+  0xd1, 0x04, 0x23, 0x5f, 0x9f, 0xbc, 0x6d, 0x9e,
+  0x88, 0x2a, 0x28, 0xc1, 0x48, 0xaf, 0xa5, 0x17,
+  0x59, 0x3a, 0x17, 0x33, 0x56, 0xaa, 0x8d, 0x27,
+  0x64, 0xfe, 0x8e, 0x8a, 0x2e, 0xba, 0xf2, 0x66,
+  0xcc, 0x66, 0xbd, 0xa4, 0xfe, 0xa9, 0x07, 0x0d,
+  0xae, 0x8c, 0x9f, 0x70, 0xf7, 0x87, 0xaa, 0x01,
+  0x47, 0x6b, 0xf9, 0x0f, 0x09, 0x18, 0x42, 0x76,
+  0xc4, 0xa3, 0xb9, 0x55, 0x11, 0x8d, 0xa3, 0xa5,
+  0x69, 0x30, 0x91, 0xb7, 0x03, 0xef, 0x7f, 0x12,
+  0xe6, 0xb9, 0x78, 0x73, 0xe0, 0xc0, 0x4f, 0xc6,
+  0xd9, 0x43, 0x99, 0x95, 0x0b, 0x4d, 0x58, 0xd3,
+  0x6b, 0x76, 0xb0, 0x6a, 0xcf, 0x68, 0x6d, 0xf0,
+  0xd9, 0xc1, 0x88, 0x43, 0x9d, 0xf9, 0x04, 0xcb,
+  0xc9, 0x82, 0x6c, 0xee, 0xd4, 0x9c, 0xbd, 0x1c,
+  0x4d, 0x54, 0x29, 0x83, 0xa9, 0x5e, 0xaa, 0x10,
+  0xa7, 0xc1, 0x04, 0x29, 0x28, 0x31, 0x3a, 0x79,
+  0x31, 0x32, 0x39, 0x3a, 0x00, 0x82, 0x33, 0xf1,
+  0x91, 0xe3, 0xf2, 0x12, 0x93, 0x5a, 0xed, 0x0c,
+  0x9d, 0xec, 0x67, 0xaa, 0xa7, 0x97, 0x7f, 0x9f,
+  0x5e, 0xef, 0x6a, 0x3e, 0xa4, 0x7f, 0x9b, 0xed,
+  0x65, 0xd7, 0xba, 0x40, 0x6d, 0xe1, 0xde, 0xc1,
+  0x14, 0x4c, 0x9b, 0x28, 0x5c, 0x03, 0x8e, 0x1a,
+  0xd4, 0x1b, 0x80, 0x1b, 0x07, 0xd6, 0x84, 0x04,
+  0x49, 0x6c, 0x1b, 0x08, 0x84, 0x15, 0x54, 0x62,
+  0xca, 0xd5, 0x75, 0xff, 0xc8, 0xb3, 0x81, 0x76,
+  0x82, 0x91, 0x35, 0x80, 0x20, 0x73, 0x2a, 0x21,
+  0xca, 0x22, 0x06, 0xa7, 0x73, 0x99, 0x75, 0x7e,
+  0x5e, 0xa6, 0x09, 0x59, 0x66, 0x2c, 0xcd, 0xb1,
+  0x8d, 0x3b, 0xc0, 0x68, 0xc5, 0x41, 0xa0, 0x9d,
+  0x82, 0x15, 0xc4, 0xdd, 0x47, 0x1c, 0x5b, 0xa9,
+  0x74, 0x18, 0xaf, 0x72, 0x63, 0x6b, 0x0a, 0x4e,
+  0x95, 0x09, 0x7a, 0xb5, 0x4b, 0x98, 0x85, 0xb9,
+  0x6d, 0x9d, 0x3b, 0x73, 0x8c, 0x29, 0x29, 0x29,
+};
+
+/* Sample DSA signature of message "hello" with sample key.  */
+static char sig_dump[] = {
+  0x28, 0x37, 0x3a, 0x73, 0x69, 0x67, 0x2d, 0x76,
+  0x61, 0x6c, 0x28, 0x33, 0x3a, 0x64, 0x73, 0x61,
+  0x28, 0x31, 0x3a, 0x72, 0x32, 0x30, 0x3a, 0xb6,
+  0x60, 0x37, 0xef, 0x02, 0x7c, 0x7c, 0x6e, 0x4f,
+  0x66, 0x8c, 0x7c, 0x26, 0x77, 0xd9, 0x33, 0x90,
+  0xba, 0x7c, 0xfb, 0x29, 0x28, 0x31, 0x3a, 0x73,
+  0x32, 0x30, 0x3a, 0x83, 0xc0, 0x84, 0x72, 0xc6,
+  0x1c, 0x85, 0x6f, 0x8b, 0x9b, 0xb0, 0x38, 0x38,
+  0xb2, 0xb6, 0xdf, 0x1c, 0x52, 0x96, 0x1b, 0x29,
+  0x29, 0x29,
+};
+
+extern gcry_pk_spec_t _gcry_pubkey_spec_dsa;
+
+static void
+dsa_sexp_test (void)
+{
+  gcry_sexp_t sign_parms, sign_parms_invalid, pubkey, sig;
+  int rc;
+  grub_size_t errof;
+
+  rc = _gcry_sexp_build (&sign_parms_invalid, &errof,
+			"(data (value \"hi\"))\n");
+  grub_test_assert (rc == 0, "sexp build failed");
+
+  rc = _gcry_sexp_build (&sign_parms, &errof,
+			"(data (value \"hello\"))\n");
+  grub_test_assert (rc == 0, "sexp build failed");
+  rc = _gcry_sexp_new (&pubkey, pubkey_dump, sizeof(pubkey_dump), 0);
+  grub_test_assert (rc == 0, "sexp new failed");
+  rc = _gcry_sexp_new (&sig, sig_dump, sizeof(sig_dump), 0);
+  grub_test_assert (rc == 0, "sexp new failed");
+  rc = _gcry_pubkey_spec_dsa.verify (sig, sign_parms, pubkey);
+  grub_test_assert (rc == 0, "signature verification failed: %d", rc);
+  rc = _gcry_pubkey_spec_dsa.verify (sig, sign_parms_invalid, pubkey);
+  grub_test_assert (rc != 0, "signature verification succeded wrongly");
+}
+
+GRUB_FUNCTIONAL_TEST (dsa_sexp_test, dsa_sexp_test);
diff --git a/grub-core/tests/rsa_sexp_test.c b/grub-core/tests/rsa_sexp_test.c
new file mode 100644
index 000000000..6ebba81f6
--- /dev/null
+++ b/grub-core/tests/rsa_sexp_test.c
@@ -0,0 +1,101 @@
+/*
+ *  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/crypto.h>
+#include <grub/gcrypt/gcrypt.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+/* Sample RSA key.  */
+static char pubkey_dump[] = {
+  0x28, 0x31, 0x30, 0x3a, 0x70, 0x75, 0x62, 0x6c,
+  0x69, 0x63, 0x2d, 0x6b, 0x65, 0x79, 0x28, 0x33,
+  0x3a, 0x72, 0x73, 0x61, 0x28, 0x31, 0x3a, 0x6e,
+  0x31, 0x32, 0x39, 0x3a, 0x00, 0xe1, 0x35, 0xc1,
+  0x97, 0x90, 0xe8, 0x54, 0xa8, 0x3b, 0x97, 0x05,
+  0xaf, 0x45, 0xaf, 0x67, 0xbf, 0xec, 0x07, 0xbe,
+  0x9b, 0x55, 0x9c, 0x3f, 0x47, 0xae, 0x25, 0xb6,
+  0xe3, 0x23, 0x99, 0x10, 0x5e, 0x17, 0x1a, 0xda,
+  0x33, 0xe6, 0x73, 0x0d, 0x96, 0x9c, 0x5c, 0x25,
+  0x13, 0x5d, 0x49, 0xb9, 0x86, 0xc0, 0xb1, 0x80,
+  0x29, 0x20, 0xb2, 0x91, 0x72, 0x43, 0xcc, 0x2a,
+  0x67, 0xd3, 0x11, 0xe8, 0x7b, 0x21, 0x75, 0xf6,
+  0x1b, 0xc0, 0xb2, 0x01, 0xc8, 0x35, 0xaa, 0xfb,
+  0xa7, 0x29, 0xb4, 0xb9, 0x94, 0x4e, 0x53, 0x49,
+  0x82, 0x74, 0xe9, 0x23, 0x69, 0xa4, 0xf6, 0xdf,
+  0x40, 0x2a, 0x73, 0x01, 0xfa, 0xe7, 0xf8, 0x32,
+  0x6b, 0x57, 0xfe, 0xb9, 0x7d, 0x02, 0xc2, 0xfb,
+  0x7f, 0x99, 0x1f, 0x6e, 0x8d, 0x53, 0x01, 0x56,
+  0xaf, 0x46, 0x62, 0xb3, 0xe0, 0xa8, 0xa6, 0x0a,
+  0x55, 0x2c, 0x4b, 0x85, 0x5b, 0x29, 0x28, 0x31,
+  0x3a, 0x65, 0x33, 0x3a, 0x01, 0x00, 0x01, 0x29,
+  0x29, 0x29,
+};
+
+/* Sample RSA signature of message "hello" with sample key.  */
+static char sig_dump[] = {
+  0x28, 0x37, 0x3a, 0x73, 0x69, 0x67, 0x2d, 0x76,
+  0x61, 0x6c, 0x28, 0x33, 0x3a, 0x72, 0x73, 0x61,
+  0x28, 0x31, 0x3a, 0x73, 0x31, 0x32, 0x38, 0x3a,
+  0x5b, 0x2d, 0xeb, 0xa5, 0x4b, 0x8b, 0xd9, 0x92,
+  0x66, 0x57, 0x89, 0xd8, 0x31, 0xc0, 0x0e, 0x53,
+  0xf8, 0x1c, 0x4f, 0xc8, 0x79, 0x67, 0xb9, 0x10,
+  0xe5, 0x63, 0x5f, 0xef, 0xb1, 0x0b, 0x0e, 0x7f,
+  0xed, 0x86, 0x06, 0xa8, 0x05, 0xbf, 0x6b, 0xd1,
+  0x36, 0x41, 0x08, 0x3b, 0xd0, 0xbd, 0xef, 0xb7,
+  0xc2, 0x69, 0xb8, 0xb4, 0x3e, 0x2c, 0xb5, 0x39,
+  0x13, 0x03, 0xca, 0xad, 0x5f, 0xd2, 0x57, 0x23,
+  0x19, 0xdd, 0x71, 0xdd, 0x93, 0xe1, 0x3e, 0x43,
+  0xaf, 0xdd, 0x94, 0x07, 0xf3, 0x78, 0xb3, 0x2a,
+  0x57, 0x24, 0x97, 0x04, 0x58, 0xc1, 0xaf, 0xd3,
+  0xe7, 0xa7, 0x65, 0xd1, 0x23, 0xa3, 0x93, 0x18,
+  0xc7, 0x52, 0x70, 0x53, 0x60, 0x8b, 0x5a, 0x5d,
+  0x6e, 0xf9, 0x83, 0x52, 0x99, 0xbb, 0x0a, 0x53,
+  0x0e, 0x2a, 0x7f, 0x81, 0x52, 0x02, 0x32, 0xa4,
+  0xfc, 0xe0, 0x17, 0x0c, 0x0e, 0x96, 0xbd, 0x01,
+  0x29, 0x29, 0x29,
+};
+
+extern gcry_pk_spec_t _gcry_pubkey_spec_rsa;
+
+static void
+rsa_sexp_test (void)
+{
+  gcry_sexp_t sign_parms, sign_parms_invalid, pubkey, sig;
+  int rc;
+  grub_size_t errof;
+
+  rc = _gcry_sexp_build (&sign_parms_invalid, &errof,
+			"(data (flags) (value \"hi\"))\n");
+  grub_test_assert (rc == 0, "sexp build failed");
+
+  rc = _gcry_sexp_build (&sign_parms, &errof,
+			"(data (flags) (value \"hello\"))\n");
+  grub_test_assert (rc == 0, "sexp build failed");
+  rc = _gcry_sexp_new (&pubkey, pubkey_dump, sizeof(pubkey_dump), 0);
+  grub_test_assert (rc == 0, "sexp new failed");
+  rc = _gcry_sexp_new (&sig, sig_dump, sizeof(sig_dump), 0);
+  grub_test_assert (rc == 0, "sexp new failed");
+  rc = _gcry_pubkey_spec_rsa.verify (sig, sign_parms, pubkey);
+  grub_test_assert (rc == 0, "signature verification failed: %d", rc);
+  rc = _gcry_pubkey_spec_rsa.verify (sig, sign_parms_invalid, pubkey);
+  grub_test_assert (rc != 0, "signature verification succeded wrongly");
+}
+
+GRUB_FUNCTIONAL_TEST (rsa_sexp_test, rsa_sexp_test);
-- 
2.49.0


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