[PATCH v4 1/1] rsa: adds rsa3072 algorithm

Jamin Lin
2022-01-19T08:24:10Z

Add to support rsa 3072 bits algorithm in tools
for image sign at host side and adds rsa 3072 bits
verification in the image binary.

Add test case in vboot for sha384 with rsa3072 algorithm testing.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
---
configs/sandbox_defconfig | 1 +
include/u-boot/rsa.h | 1 +
lib/rsa/rsa-verify.c | 6 +++
test/py/tests/test_vboot.py | 12 +++++-
test/py/tests/vboot/sign-configs-sha384.its | 45 +++++++++++++++++++++
test/py/tests/vboot/sign-images-sha384.its | 42 +++++++++++++++++++
tools/image-sig-host.c | 7 ++++
7 files changed, 112 insertions(+), 2 deletions(-)
create mode 100644 test/py/tests/vboot/sign-configs-sha384.its
create mode 100644 test/py/tests/vboot/sign-images-sha384.its

diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 4f413582fb..6686085d2c 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -312,3 +312,4 @@ CONFIG_TEST_FDTDEC=y
CONFIG_UNIT_TEST=y
CONFIG_UT_TIME=y
CONFIG_UT_DM=y
+CONFIG_SHA384=y
diff --git a/include/u-boot/rsa.h b/include/u-boot/rsa.h
index 7556aa5b4b..bb56c2243c 100644
--- a/include/u-boot/rsa.h
+++ b/include/u-boot/rsa.h
@@ -110,6 +110,7 @@ int padding_pss_verify(struct image_sign_info *info,
#define RSA_DEFAULT_PADDING_NAME "pkcs-1.5"

#define RSA2048_BYTES (2048 / 8)
+#define RSA3072_BYTES (3072 / 8)
#define RSA4096_BYTES (4096 / 8)

/* This is the minimum/maximum key size we support, in bits */
diff --git a/lib/rsa/rsa-verify.c b/lib/rsa/rsa-verify.c
index 83f7564101..4fe487d7e5 100644
--- a/lib/rsa/rsa-verify.c
+++ b/lib/rsa/rsa-verify.c
@@ -588,6 +588,12 @@ U_BOOT_CRYPTO_ALGO(rsa2048) = {
.verify = rsa_verify,
};

+U_BOOT_CRYPTO_ALGO(rsa3072) = {
+ .name = "rsa3072",
+ .key_len = RSA3072_BYTES,
+ .verify = rsa_verify,
+};
+
U_BOOT_CRYPTO_ALGO(rsa4096) = {
.name = "rsa4096",
.key_len = RSA4096_BYTES,
diff --git a/test/py/tests/test_vboot.py b/test/py/tests/test_vboot.py
index 095e00cce3..b080d482af 100644
--- a/test/py/tests/test_vboot.py
+++ b/test/py/tests/test_vboot.py
@@ -45,6 +45,8 @@ TESTDATA = [
['sha256-pss-pad', 'sha256', '-pss', '-E -p 0x10000', False, False],
['sha256-pss-required', 'sha256', '-pss', None, True, False],
['sha256-pss-pad-required', 'sha256', '-pss', '-E -p 0x10000', True, True],
+ ['sha384-basic', 'sha384', '', None, False, False],
+ ['sha384-pad', 'sha384', '', '-E -p 0x10000', False, False],
]

@pytest.mark.boardspec('sandbox')
@@ -180,10 +182,16 @@ def test_vboot(u_boot_console, name, sha_algo, padding, sign_options, required,
name: Name of of the key (e.g. 'dev')
"""
public_exponent = 65537
+
+ if sha_algo == "sha384":
+ rsa_keygen_bits = 3072
+ else:
+ rsa_keygen_bits = 2048
+
util.run_and_log(cons, 'openssl genpkey -algorithm RSA -out %s%s.key '
- '-pkeyopt rsa_keygen_bits:2048 '
+ '-pkeyopt rsa_keygen_bits:%d '
'-pkeyopt rsa_keygen_pubexp:%d' %
- (tmpdir, name, public_exponent))
+ (tmpdir, name, rsa_keygen_bits, public_exponent))

# Create a certificate containing the public key
util.run_and_log(cons, 'openssl req -batch -new -x509 -key %s%s.key '
diff --git a/test/py/tests/vboot/sign-configs-sha384.its b/test/py/tests/vboot/sign-configs-sha384.its
new file mode 100644
index 0000000000..2869401991
--- /dev/null
+++ b/test/py/tests/vboot/sign-configs-sha384.its
@@ -0,0 +1,45 @@
+/dts-v1/;
+
+/ {
+ description = "Chrome OS kernel image with one or more FDT blobs";
+ #address-cells = <1>;
+
+ images {
+ kernel {
+ data = /incbin/("test-kernel.bin");
+ type = "kernel_noload";
+ arch = "sandbox";
+ os = "linux";
+ compression = "none";
+ load = <0x4>;
+ entry = <0x8>;
+ kernel-version = <1>;
+ hash-1 {
+ algo = "sha384";
+ };
+ };
+ fdt-1 {
+ description = "snow";
+ data = /incbin/("sandbox-kernel.dtb");
+ type = "flat_dt";
+ arch = "sandbox";
+ compression = "none";
+ fdt-version = <1>;
+ hash-1 {
+ algo = "sha384";
+ };
+ };
+ };
+ configurations {
+ default = "conf-1";
+ conf-1 {
+ kernel = "kernel";
+ fdt = "fdt-1";
+ signature {
+ algo = "sha384,rsa3072";
+ key-name-hint = "dev";
+ sign-images = "fdt", "kernel";
+ };
+ };
+ };
+};
diff --git a/test/py/tests/vboot/sign-images-sha384.its b/test/py/tests/vboot/sign-images-sha384.its
new file mode 100644
index 0000000000..be1a9a653c
--- /dev/null
+++ b/test/py/tests/vboot/sign-images-sha384.its
@@ -0,0 +1,42 @@
+/dts-v1/;
+
+/ {
+ description = "Chrome OS kernel image with one or more FDT blobs";
+ #address-cells = <1>;
+
+ images {
+ kernel {
+ data = /incbin/("test-kernel.bin");
+ type = "kernel_noload";
+ arch = "sandbox";
+ os = "linux";
+ compression = "none";
+ load = <0x4>;
+ entry = <0x8>;
+ kernel-version = <1>;
+ signature {
+ algo = "sha384,rsa3072";
+ key-name-hint = "dev";
+ };
+ };
+ fdt-1 {
+ description = "snow";
+ data = /incbin/("sandbox-kernel.dtb");
+ type = "flat_dt";
+ arch = "sandbox";
+ compression = "none";
+ fdt-version = <1>;
+ signature {
+ algo = "sha384,rsa3072";
+ key-name-hint = "dev";
+ };
+ };
+ };
+ configurations {
+ default = "conf-1";
+ conf-1 {
+ kernel = "kernel";
+ fdt = "fdt-1";
+ };
+ };
+};
diff --git a/tools/image-sig-host.c b/tools/image-sig-host.c
index 8ed6998dab..d0133aec4c 100644
--- a/tools/image-sig-host.c
+++ b/tools/image-sig-host.c
@@ -55,6 +55,13 @@ struct crypto_algo crypto_algos[] = {
.add_verify_data = rsa_add_verify_data,
.verify = rsa_verify,
},
+ {
+ .name = "rsa3072",
+ .key_len = RSA3072_BYTES,
+ .sign = rsa_sign,
+ .add_verify_data = rsa_add_verify_data,
+ .verify = rsa_verify,
+ },
{
.name = "rsa4096",
.key_len = RSA4096_BYTES,
--
2.17.1