[PATCH v3 1/1] rsa: adds rsa3072 algorithm
Jamin Lin
jamin_lin at aspeedtech.com
Tue Jan 18 08:02:38 CET 2022
The 01/14/2022 18:14, Tom Rini wrote:
> On Fri, Dec 10, 2021 at 02:00:55PM +0800, Jamin Lin wrote:
>
> > 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 at aspeedtech.com>
> > ---
> > 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 ++++
> > 6 files changed, 111 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/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,
>
> With current master these tests run and fail:
> https://source.denx.de/u-boot/u-boot/-/jobs/376757 (and also fail for me
> when running locally), please re-check and resubmit, thanks.
>
> --
> Tom
Hi Tom,
Thanks for review.
I noticed that the latest version of u-boot test vboot failed for sha384.
So far, u-boot support sha256, sha384 and sha512 for hash algorithm.
And supports RSA 2048 and 4096 bits.
I tried to add test cases in test_vboot.py but I encountered verified failed issue
only if hash algorithm was "sha384"
For example:
I created two test files which were sign-images-sha384.its and sign-configs-sha384.its and
placed them here, https://source.denx.de/u-boot/u-boot/-/tree/master/test/py/tests/vboot
The contents of both files were very similar sign-images-sha256.its and sign-images-sha256.its.
The difference was that I modified to use sha384 with RSA 2048.
I tested sha256/rsa2048, sha256/rsa512 pass but failed in sha384.
Do you have any idea or could you please give any suggestion?
Could you please help me to check this issue?
https://source.denx.de/u-boot/u-boot/-/jobs/376757
The CI showed incorrect hash data for sha384.
My local got the same test result
Thanks-Jamin
## Loading kernel from FIT Image at 00000100 ...
Using 'conf-1' configuration
Verifying Hash Integrity ... OK
Trying 'kernel' kernel subimage
Description: unavailable
Created: 2022-01-18 6:39:31 UTC
Type: Kernel Image (no loading done)
Compression: uncompressed
Data Start: 0x000001c4
Data Size: 500 Bytes = 500 Bytes
Sign algo: sha384,rsa2048:dev
Sign value: 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
Timestamp: 2022-01-18 6:39:32 UTC
Verifying Hash Integrity ... sha384,rsa2048:dev- Failed to verify required signature 'key-dev'
error!
Unable to verify required signature for '' hash node in 'kernel' image node
Bad Data Hash
ERROR: can't get kernel image!
My test data:
/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,rsa2048";
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,rsa2048";
key-name-hint = "dev";
};
};
};
configurations {
default = "conf-1";
conf-1 {
kernel = "kernel";
fdt = "fdt-1";
};
};
};
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