test/rsa: Add test for RSA signature checking

This tests RSA 2048 with public exponent F4 (65537).

BRANCH=none
BUG=chromium:663631
TEST=make run-rsa3

Change-Id: I195a349bb9a862606971054adc9ac3b56a817fe7
Reviewed-on: https://chromium-review.googlesource.com/408129
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>

6 files changed, 217 insertions, 0 deletions

diff --git a/test/build.mk b/test/build.mk
index a757ac2642..16c78c818a 100644
--- a/test/build.mk
+++ b/test/build.mk
@@ -42,6 +42,7 @@ test-list-host+=bklight_lid bklight_passthru interrupt timer_dos button
 test-list-host+=math_util motion_lid sbs_charging_v2 battery_get_params_smart
 test-list-host+=lightbar inductive_charging usb_pd fan charge_manager
 test-list-host+=charge_manager_drp_charging charge_ramp
+test-list-host+=rsa
 endif
 
 battery_get_params_smart-y=battery_get_params_smart.o
@@ -71,6 +72,7 @@ pingpong-y=pingpong.o
 power_button-y=power_button.o
 powerdemo-y=powerdemo.o
 queue-y=queue.o
+rsa-y=rsa.o
 sbs_charging-y=sbs_charging.o
 sbs_charging_v2-y=sbs_charging_v2.o
 stress-y=stress.o
diff --git a/test/rsa.c b/test/rsa.c
new file mode 100644
index 0000000000..946515b0a2
--- /dev/null
+++ b/test/rsa.c
@@ -0,0 +1,49 @@
+/* Copyright 2016 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Tests RSA implementation.
+ */
+
+#include "console.h"
+#include "common.h"
+#include "rsa.h"
+#include "test_util.h"
+#include "util.h"
+
+#include "rsa2048-F4.h"
+
+void run_test(void)
+{
+	int good;
+	uint32_t rsa_workbuf[3 * RSANUMBYTES/4];
+
+	good = rsa_verify(rsa_key, sig, hash, rsa_workbuf);
+	if (!good) {
+		ccprintf("RSA verify FAILED\n");
+		test_fail();
+		return;
+	}
+	ccprintf("RSA verify OK\n");
+
+	/* Test with a wrong hash */
+	good = rsa_verify(rsa_key, sig, hash_wrong, rsa_workbuf);
+	if (good) {
+		ccprintf("RSA verify OK (expected fail)\n");
+		test_fail();
+		return;
+	}
+	ccprintf("RSA verify FAILED (as expected)\n");
+
+	/* Test with a wrong signature */
+	good = rsa_verify(rsa_key, sig+1, hash, rsa_workbuf);
+	if (good) {
+		ccprintf("RSA verify OK (expected fail)\n");
+		test_fail();
+		return;
+	}
+	ccprintf("RSA verify FAILED (as expected)\n");
+
+	test_pass();
+}
+
diff --git a/test/rsa.tasklist b/test/rsa.tasklist
new file mode 100644
index 0000000000..30e5f7fc22
--- /dev/null
+++ b/test/rsa.tasklist
@@ -0,0 +1,17 @@
+/* Copyright 2016 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/**
+ * List of enabled tasks in the priority order
+ *
+ * The first one has the lowest priority.
+ *
+ * For each task, use the macro TASK_TEST(n, r, d, s) where :
+ * 'n' in the name of the task
+ * 'r' in the main routine of the task
+ * 'd' in an opaque parameter passed to the routine at startup
+ * 's' is the stack size in bytes; must be a multiple of 8
+ */
+#define CONFIG_TEST_TASK_LIST
diff --git a/test/rsa2048-F4.h b/test/rsa2048-F4.h
new file mode 100644
index 0000000000..a145d756ac
--- /dev/null
+++ b/test/rsa2048-F4.h
@@ -0,0 +1,117 @@
+/* Copyright 2016 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * RSA 2048 with F4 exponent public key and verification.
+ * Private key in rsa2048-F4.pem.
+ */
+
+/* First generate a key:
+ * # openssl genrsa -out key.pem 2048
+ * # openssl rsa -in key.pem -pubout > key.pub
+ * Then dump the key:
+ * # dumpRSAPublicKey -pub key.pub | xxd -i
+ * That's a slightly different format, so comment out the 1st 4 bytes (length),
+ * and move the next 4 to the end (n0inv).
+ */
+const uint8_t rsa_data[] = {
+	/*  Length */
+	/* 0x40, 0x00, 0x00, 0x00, */
+	0x3d, 0xbe, 0xa2, 0xde,
+	0x0c, 0xa8, 0x6b, 0xcc, 0x1b, 0x58, 0x2e, 0x1b, 0x44, 0x3f, 0xda, 0xdb,
+	0x1d, 0xe1, 0xe4, 0xfd, 0x4b, 0xc5, 0x34, 0xc9, 0x7e, 0x58, 0xfc, 0x82,
+	0x6d, 0x95, 0x9f, 0x46, 0x01, 0xaf, 0x7c, 0xa1, 0x50, 0xd5, 0x9c, 0x22,
+	0xe1, 0x04, 0xcb, 0x41, 0x9a, 0xc4, 0xfe, 0xfa, 0xb6, 0x67, 0x89, 0x0f,
+	0xe5, 0x59, 0xa0, 0xd4, 0x55, 0xb3, 0xb1, 0x6f, 0x06, 0x28, 0x68, 0x1b,
+	0x0e, 0x25, 0x97, 0x47, 0xc6, 0xbe, 0x46, 0x14, 0x60, 0x77, 0x11, 0x46,
+	0xe2, 0x0c, 0x20, 0x59, 0x8c, 0x95, 0x87, 0x62, 0xe8, 0x05, 0xa9, 0xaf,
+	0x53, 0xab, 0x19, 0xca, 0xc0, 0xf4, 0x41, 0x05, 0x95, 0x3a, 0x6f, 0xd0,
+	0xdd, 0x87, 0xa7, 0xad, 0xcb, 0x5a, 0x43, 0x86, 0xb4, 0xf4, 0xe9, 0x45,
+	0x2a, 0x50, 0xe9, 0xe0, 0xf3, 0x16, 0x29, 0x87, 0xd9, 0xec, 0xc5, 0x48,
+	0xee, 0xf3, 0x53, 0xec, 0x18, 0x7f, 0x46, 0xdd, 0x4b, 0xb9, 0xf9, 0x4b,
+	0xcd, 0xe4, 0x2a, 0xc8, 0x7d, 0x1a, 0x5e, 0x58, 0x8b, 0x55, 0xf8, 0xed,
+	0x4d, 0x65, 0xc0, 0x4a, 0x8e, 0x27, 0x2f, 0x97, 0x82, 0x2f, 0x86, 0x69,
+	0xcf, 0xde, 0x00, 0x95, 0x0e, 0x90, 0x39, 0x12, 0x3e, 0x69, 0x2b, 0x7f,
+	0xd4, 0xc2, 0xb0, 0x4b, 0x89, 0x41, 0xb2, 0x8f, 0xb7, 0xfb, 0xed, 0xf3,
+	0x13, 0x1d, 0xb5, 0x01, 0x10, 0x00, 0xdf, 0x3a, 0xbe, 0x0d, 0x1f, 0x12,
+	0xd8, 0x9c, 0xeb, 0x30, 0xfa, 0x7e, 0x57, 0xde, 0x95, 0x7e, 0xdf, 0x06,
+	0x9f, 0x7e, 0x08, 0xfc, 0x4f, 0xd4, 0xfa, 0x8f, 0x9a, 0x8a, 0xc8, 0x03,
+	0xe7, 0xf2, 0xd0, 0x8e, 0x35, 0xb7, 0x33, 0x67, 0x02, 0x77, 0x1e, 0x8f,
+	0xe9, 0xc8, 0x80, 0x35, 0x6d, 0x24, 0xa2, 0xf9, 0x1c, 0x05, 0xd8, 0x1e,
+	0x79, 0x07, 0x7e, 0xd4, 0x48, 0xb8, 0x95, 0xfd, 0xf8, 0xb4, 0x0b, 0xd6,
+	0x29, 0x86, 0xb1, 0x7e, 0xbe, 0xf4, 0xe6, 0xfb, 0x24, 0x62, 0xf1, 0x00,
+	0x1c, 0xf1, 0x4a, 0x33, 0xea, 0x90, 0xf9, 0xbc, 0x5d, 0x4a, 0xf1, 0x6b,
+	0x07, 0xfe, 0x77, 0x62, 0x60, 0x83, 0xc2, 0x22, 0x54, 0xfa, 0x94, 0xf9,
+	0x59, 0x48, 0x62, 0x02, 0xd4, 0x97, 0x53, 0x3e, 0xfb, 0xfc, 0x06, 0x63,
+	0xf7, 0x28, 0x75, 0x34, 0x2c, 0xac, 0x98, 0xae, 0x8b, 0x78, 0xbd, 0x3c,
+	0x94, 0x58, 0x40, 0xdf, 0x8e, 0xec, 0x13, 0xcd, 0xe7, 0x20, 0xb8, 0x84,
+	0xda, 0xbd, 0x8e, 0x76, 0xbd, 0x1a, 0x7d, 0x3d, 0x18, 0x99, 0x91, 0x54,
+	0x19, 0xbb, 0xab, 0xbe, 0xc3, 0x8c, 0x0d, 0x23, 0x0b, 0xef, 0x5f, 0x1c,
+	0x49, 0xf0, 0xd1, 0x02, 0x81, 0x37, 0xc8, 0x75, 0x2e, 0xb9, 0x41, 0xf3,
+	0x90, 0xc4, 0xa2, 0xdc, 0x2f, 0xa2, 0x21, 0xd0, 0x8b, 0x3b, 0x40, 0x3a,
+	0xc4, 0x26, 0x7c, 0x7d, 0x7b, 0x79, 0xe2, 0x9b, 0xe3, 0xb7, 0x68, 0xd1,
+	0xcf, 0xc7, 0xce, 0x8c, 0x26, 0x8f, 0x2d, 0xd0, 0x89, 0xc3, 0x18, 0xd1,
+	0x07, 0x93, 0xa6, 0x1f, 0x9d, 0x13, 0x2a, 0xf2, 0xaf, 0xef, 0xbe, 0xb2,
+	0x02, 0x39, 0xd8, 0xd3, 0xeb, 0xdf, 0x97, 0xe7, 0x91, 0xb2, 0xc5, 0xd0,
+	0x21, 0x8f, 0xdd, 0x0c, 0x95, 0x30, 0xc0, 0x5b, 0xd6, 0x00, 0xd2, 0x62,
+	0x71, 0x89, 0x69, 0x2b, 0x22, 0x67, 0x05, 0x67, 0x1f, 0x02, 0x57, 0x6d,
+	0xc6, 0x3f, 0xed, 0xfe, 0x1f, 0x4c, 0x28, 0x7b, 0x36, 0x32, 0x3a, 0xa2,
+	0x61, 0xd2, 0x7a, 0xe1, 0xfd, 0x74, 0x02, 0xe3, 0x70, 0x76, 0x02, 0x19,
+	0x3a, 0x46, 0xe9, 0x86, 0x50, 0x6e, 0xce, 0x3f, 0x58, 0x0b, 0x0e, 0xef,
+	0xcf, 0x5a, 0xa2, 0x66, 0x7a, 0xa2, 0x0e, 0x02, 0x56, 0x87, 0x98, 0x67,
+	0x90, 0xf4, 0x9f, 0x3b, 0xf7, 0xaa, 0x1c, 0xd9, 0xda, 0x0d, 0x49, 0x12,
+	0x50, 0xa3, 0x70, 0x62,
+	/* n0inv */
+	0xeb, 0xb6, 0x8c, 0xb4
+};
+
+const struct rsa_public_key *rsa_key = (struct rsa_public_key *)rsa_data;
+BUILD_ASSERT(sizeof(*rsa_key) == sizeof(rsa_data));
+
+/* SHA-256 sum to verify:
+ * # sha256sum README | sed -e 's/\(..\)/0x\1, /mg'
+ */
+const uint8_t hash[] = {
+	0x6c, 0x5f, 0xef, 0x7f, 0x63, 0x1d, 0xb4, 0x35, 0x6c, 0xae, 0x8b, 0x2a,
+	0x4e, 0xde, 0xc5, 0xeb, 0x11, 0xba, 0x1f, 0x44, 0x40, 0xb6, 0x3a, 0x52,
+	0xf2, 0x70, 0xef, 0xee, 0x44, 0x4b, 0x57, 0x62
+};
+
+/* Incorrect hash to test the negative case */
+const uint8_t hash_wrong[] = {
+	0x61, 0x1b, 0xd2, 0x44, 0xc7, 0x18, 0xa7, 0x2d, 0x0f, 0x2d, 0x3d, 0x0f,
+	0xe3, 0xb3, 0xc5, 0xe4, 0x12, 0xc2, 0x7b, 0x1e, 0x05, 0x2c, 0x6f, 0xad,
+	0xc4, 0xac, 0x71, 0x55, 0xe8, 0x80, 0x5c, 0x38
+};
+
+/* Generate signature using futility:
+ * # futility create key.pem
+ * # futility sign --type rwsig --prikey key.vbprik2 README README.out
+ * # dd skip=56 bs=1 if=README.out | xxd -i
+ */
+const uint8_t sig[] = {
+	0x1a, 0xd8, 0xa0, 0x94, 0x1f, 0x96, 0x8c, 0x40, 0x22, 0xbf, 0xb7, 0xe0,
+	0x65, 0x30, 0xf8, 0xe1, 0xef, 0x9e, 0x70, 0x38, 0x02, 0xd9, 0x30, 0x10,
+	0x9f, 0xf9, 0x23, 0x34, 0xd8, 0xe3, 0x04, 0xed, 0x10, 0xcb, 0xde, 0x8b,
+	0xc3, 0x1e, 0x89, 0x58, 0x24, 0x90, 0xc1, 0x09, 0x3a, 0x08, 0xd9, 0x2f,
+	0x5b, 0xe9, 0xbe, 0x0c, 0x23, 0xd6, 0xd0, 0x5d, 0x1e, 0x85, 0x59, 0x62,
+	0xcb, 0x14, 0x76, 0x3f, 0x8f, 0xe6, 0xb9, 0xd2, 0xbd, 0x1c, 0xef, 0xd6,
+	0xb0, 0x21, 0xaf, 0x3d, 0x93, 0x6d, 0x2d, 0x78, 0x31, 0x87, 0x37, 0xab,
+	0xfe, 0xca, 0xe8, 0x32, 0xda, 0x86, 0x67, 0x48, 0x0e, 0xab, 0xd0, 0xdd,
+	0x14, 0x39, 0xe5, 0x8e, 0x65, 0xbb, 0x28, 0xe6, 0xcd, 0xb7, 0xad, 0xbe,
+	0x86, 0x95, 0xec, 0xf5, 0xc0, 0x00, 0x45, 0x92, 0x3d, 0x67, 0xd7, 0xb6,
+	0x30, 0x60, 0x6c, 0x6d, 0x86, 0xb5, 0xb5, 0x97, 0xe7, 0x52, 0xca, 0xa4,
+	0x21, 0xae, 0x48, 0xf9, 0x4a, 0xc8, 0xad, 0xeb, 0xd6, 0x0b, 0xa4, 0x58,
+	0x61, 0xf2, 0xaf, 0xbc, 0x2a, 0xe6, 0xd7, 0x78, 0x23, 0x66, 0x9c, 0x12,
+	0x87, 0x54, 0x30, 0x68, 0x4b, 0xdb, 0xc2, 0x66, 0xf6, 0x4b, 0x49, 0x44,
+	0xbd, 0xb9, 0x1a, 0xdc, 0x71, 0x0f, 0xa4, 0x63, 0xfc, 0x56, 0x41, 0x91,
+	0xe5, 0x30, 0xb6, 0xa9, 0xe6, 0x8c, 0x6f, 0x91, 0x8e, 0x36, 0xd6, 0x4d,
+	0xe1, 0xdd, 0x0e, 0x1d, 0x1a, 0x71, 0x51, 0x68, 0xf6, 0xf3, 0xea, 0x74,
+	0x3a, 0x5f, 0x35, 0x6a, 0x0f, 0xd4, 0x86, 0x96, 0x3e, 0x89, 0xab, 0x88,
+	0x03, 0x40, 0xe2, 0x2b, 0x72, 0xa5, 0xa5, 0xf7, 0x79, 0xd0, 0x5a, 0xcb,
+	0xfa, 0x40, 0x12, 0xe2, 0x0c, 0xf0, 0xfb, 0xd8, 0x9c, 0x41, 0x30, 0xab,
+	0x99, 0x5d, 0x26, 0xe0, 0x6a, 0xcf, 0x0b, 0x4b, 0x4f, 0xe4, 0x85, 0xe6,
+	0x8d, 0xe3, 0x11, 0xe0,
+	/* Padding */
+	0x00
+};
diff --git a/test/rsa2048-F4.pem b/test/rsa2048-F4.pem
new file mode 100644
index 0000000000..1662f8ebb5
--- /dev/null
+++ b/test/rsa2048-F4.pem
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----
diff --git a/test/test_config.h b/test/test_config.h
index 0cfd7c0b83..4d772dffac 100644
--- a/test/test_config.h
+++ b/test/test_config.h
@@ -51,6 +51,11 @@
 #define CONFIG_TABLET_MODE
 #endif
 
+#ifdef TEST_RSA
+#define CONFIG_RSA
+#define CONFIG_RSA_KEY_SIZE 2048
+#endif
+
 #ifdef TEST_SBS_CHARGING
 #define CONFIG_BATTERY_MOCK
 #define CONFIG_BATTERY_SMART