Commit c27b2d2012e1 ("crypto: testmgr - allow ecdsa-nist-p256 and -p384 in FIPS mode") enabled support for ECDSA in crypto/testmgr.c. The PKCS#7 signature verification API builds upon the KCAPI primitives to perform its high-level operations. Therefore, this change in testmgr.c also allows ECDSA to be used by the PKCS#7 signature verification API (in FIPS mode). However, from a FIPS perspective, the PKCS#7 signature verification API is a distinct "service" from the KCAPI primitives. This is because the PKCS#7 API performs a "full" signature verification, which consists of both hashing the data to be verified, and the public key operation. On the other hand, the KCAPI primitive does not perform this hashing step - it accepts pre-hashed data from the caller and only performs the public key operation. For this reason, the ECDSA self-tests in crypto/testmgr.c are not sufficient to cover ECDSA signature verification offered by the PKCS#7 API. This is reflected by the self-test already present in this file for RSA PKCS#1 v1.5 signature verification. The solution is simply to add a second self-test here for ECDSA. P-256 with SHA-256 hashing was chosen as those parameters should remain FIPS-approved for the foreseeable future, while keeping the performance impact to a minimum. The ECDSA certificate and PKCS#7 signed data was generated using OpenSSL. The existing input data was reused. Signed-off-by: Joachim Vandersmissen <git@xxxxxxxxx> --- crypto/asymmetric_keys/selftest.c | 66 +++++++++++++++++++++++++++++-- 1 file changed, 62 insertions(+), 4 deletions(-) diff --git a/crypto/asymmetric_keys/selftest.c b/crypto/asymmetric_keys/selftest.c index c50da7ef90ae..68620a9ab974 100644 --- a/crypto/asymmetric_keys/selftest.c +++ b/crypto/asymmetric_keys/selftest.c @@ -22,7 +22,8 @@ struct certs_test { * Set of X.509 certificates to provide public keys for the tests. These will * be loaded into a temporary keyring for the duration of the testing. */ -static const __initconst u8 certs_selftest_keys[] = { +static const u8 certs_selftest_keys[] __initconst = { + /* 4096-bit RSA certificate */ "\x30\x82\x05\x55\x30\x82\x03\x3d\xa0\x03\x02\x01\x02\x02\x14\x73" "\x98\xea\x98\x2d\xd0\x2e\xa8\xb1\xcf\x57\xc7\xf2\x97\xb3\xe6\x1a" "\xfc\x8c\x0a\x30\x0d\x06\x09\x2a\x86\x48\x86\xf7\x0d\x01\x01\x0b" @@ -109,12 +110,45 @@ static const __initconst u8 certs_selftest_keys[] = { "\xad\x5a\xf5\xb3\xdb\x69\x21\x04\xfd\xd3\x1c\xdf\x94\x9d\x56\xb0" "\x0a\xd1\x95\x76\x8d\xec\x9e\xdd\x0b\x15\x97\x64\xad\xe5\xf2\x62" "\x02\xfc\x9e\x5f\x56\x42\x39\x05\xb3" +#if IS_ENABLED(CONFIG_CRYPTO_ECDSA) + /* P-256 ECDSA certificate */ + "\x30\x82\x01\xd4\x30\x82\x01\x7b\xa0\x03\x02\x01\x02\x02\x14\x2e" + "\xea\x64\x8d\x7f\x17\xe6\x2e\x9e\x58\x69\xc8\x87\xc6\x8e\x1b\xd0" + "\xf8\x6f\xde\x30\x0a\x06\x08\x2a\x86\x48\xce\x3d\x04\x03\x02\x30" + "\x3a\x31\x38\x30\x36\x06\x03\x55\x04\x03\x0c\x2f\x43\x65\x72\x74" + "\x69\x66\x69\x63\x61\x74\x65\x20\x76\x65\x72\x69\x66\x69\x63\x61" + "\x74\x69\x6f\x6e\x20\x45\x43\x44\x53\x41\x20\x73\x65\x6c\x66\x2d" + "\x74\x65\x73\x74\x69\x6e\x67\x20\x6b\x65\x79\x30\x20\x17\x0d\x32" + "\x34\x30\x34\x31\x33\x32\x32\x31\x36\x32\x36\x5a\x18\x0f\x32\x31" + "\x32\x34\x30\x33\x32\x30\x32\x32\x31\x36\x32\x36\x5a\x30\x3a\x31" + "\x38\x30\x36\x06\x03\x55\x04\x03\x0c\x2f\x43\x65\x72\x74\x69\x66" + "\x69\x63\x61\x74\x65\x20\x76\x65\x72\x69\x66\x69\x63\x61\x74\x69" + "\x6f\x6e\x20\x45\x43\x44\x53\x41\x20\x73\x65\x6c\x66\x2d\x74\x65" + "\x73\x74\x69\x6e\x67\x20\x6b\x65\x79\x30\x59\x30\x13\x06\x07\x2a" + "\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48\xce\x3d\x03\x01\x07" + "\x03\x42\x00\x04\x07\xe5\x6b\x51\xaf\xfc\x19\x41\x2c\x88\x92\x6b" + "\x77\x57\x71\x03\x9e\xe2\xfe\x6e\x6a\x71\x4e\xc7\x29\x9f\x90\xe1" + "\x77\x18\x9f\xc2\xe7\x0a\x82\xd0\x8a\xe1\x81\xa9\x71\x7c\x5a\x73" + "\xfb\x25\xb9\x5b\x1e\x24\x8c\x73\x9f\xf8\x38\xf8\x48\xb4\xad\x16" + "\x19\xc0\x22\xc6\xa3\x5d\x30\x5b\x30\x1d\x06\x03\x55\x1d\x0e\x04" + "\x16\x04\x14\x29\x00\xbc\xea\x1d\xeb\x7b\xc8\x47\x9a\x84\xa2\x3d" + "\x75\x8e\xfd\xfd\xd2\xb2\xd3\x30\x1f\x06\x03\x55\x1d\x23\x04\x18" + "\x30\x16\x80\x14\x29\x00\xbc\xea\x1d\xeb\x7b\xc8\x47\x9a\x84\xa2" + "\x3d\x75\x8e\xfd\xfd\xd2\xb2\xd3\x30\x0c\x06\x03\x55\x1d\x13\x01" + "\x01\xff\x04\x02\x30\x00\x30\x0b\x06\x03\x55\x1d\x0f\x04\x04\x03" + "\x02\x07\x80\x30\x0a\x06\x08\x2a\x86\x48\xce\x3d\x04\x03\x02\x03" + "\x47\x00\x30\x44\x02\x20\x1a\xd7\xac\x07\xc8\x97\x38\xf4\x89\x43" + "\x7e\xc7\x66\x6e\xa5\x00\x7c\x12\x1d\xb4\x09\x76\x0c\x99\x6b\x8c" + "\x26\x5d\xe9\x70\x5c\xb4\x02\x20\x73\xb7\xc7\x7a\x5a\xdb\x67\x0a" + "\x96\x42\x19\xcf\x4f\x67\x4f\x35\x6a\xee\x29\x25\xf2\x4f\xc8\x10" + "\x14\x9d\x79\x69\x1c\x7a\xd7\x5d" +#endif }; /* * Signed data and detached signature blobs that form the verification tests. */ -static const __initconst u8 certs_selftest_1_data[] = { +static const u8 certs_selftest_data[] __initconst = { "\x54\x68\x69\x73\x20\x69\x73\x20\x73\x6f\x6d\x65\x20\x74\x65\x73" "\x74\x20\x64\x61\x74\x61\x20\x75\x73\x65\x64\x20\x66\x6f\x72\x20" "\x73\x65\x6c\x66\x2d\x74\x65\x73\x74\x69\x6e\x67\x20\x63\x65\x72" @@ -122,7 +156,8 @@ static const __initconst u8 certs_selftest_1_data[] = { "\x61\x74\x69\x6f\x6e\x2e\x0a" }; -static const __initconst u8 certs_selftest_1_pkcs7[] = { +static const u8 certs_selftest_rsa_pkcs7[] __initconst = { + /* 4096-bit RSA signature using PKCS#1 v1.5 padding with SHA-256 */ "\x30\x82\x02\xab\x06\x09\x2a\x86\x48\x86\xf7\x0d\x01\x07\x02\xa0" "\x82\x02\x9c\x30\x82\x02\x98\x02\x01\x01\x31\x0d\x30\x0b\x06\x09" "\x60\x86\x48\x01\x65\x03\x04\x02\x01\x30\x0b\x06\x09\x2a\x86\x48" @@ -168,12 +203,35 @@ static const __initconst u8 certs_selftest_1_pkcs7[] = { "\x77\x55\x3c\x6f\x0c\x32\xd3\x8c\x44\x39\x71\x25\xfe\x96\xd2" }; +static const u8 certs_selftest_ecdsa_pkcs7[] __initconst = { + /* P-256 ECDSA signature using SHA-256 */ + "\x30\x81\xf4\x06\x09\x2a\x86\x48\x86\xf7\x0d\x01\x07\x02\xa0\x81" + "\xe6\x30\x81\xe3\x02\x01\x01\x31\x0f\x30\x0d\x06\x09\x60\x86\x48" + "\x01\x65\x03\x04\x02\x01\x05\x00\x30\x0b\x06\x09\x2a\x86\x48\x86" + "\xf7\x0d\x01\x07\x01\x31\x81\xbf\x30\x81\xbc\x02\x01\x01\x30\x52" + "\x30\x3a\x31\x38\x30\x36\x06\x03\x55\x04\x03\x0c\x2f\x43\x65\x72" + "\x74\x69\x66\x69\x63\x61\x74\x65\x20\x76\x65\x72\x69\x66\x69\x63" + "\x61\x74\x69\x6f\x6e\x20\x45\x43\x44\x53\x41\x20\x73\x65\x6c\x66" + "\x2d\x74\x65\x73\x74\x69\x6e\x67\x20\x6b\x65\x79\x02\x14\x2e\xea" + "\x64\x8d\x7f\x17\xe6\x2e\x9e\x58\x69\xc8\x87\xc6\x8e\x1b\xd0\xf8" + "\x6f\xde\x30\x0d\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x01\x05" + "\x00\x30\x0a\x06\x08\x2a\x86\x48\xce\x3d\x04\x03\x02\x04\x48\x30" + "\x46\x02\x21\x00\x86\xd1\xf4\x06\xb6\x49\x79\xf9\x09\x5f\x35\x1a" + "\x94\x7e\x0e\x1a\x12\x4d\xd9\xe6\x2a\x2d\xcf\x2d\x0a\xee\x88\x76" + "\xe0\x35\xf3\xeb\x02\x21\x00\xdf\x11\x8a\xab\x31\xf6\x3c\x1f\x32" + "\x43\x94\xe2\xb8\x35\xc9\xf3\x12\x4e\x9b\x31\x08\x10\x5d\x8d\xe2" + "\x43\x0a\x5f\xf5\xfd\xa2\xf1" +}; + /* * List of tests to be run. */ #define TEST(data, pkcs7) { data, sizeof(data) - 1, pkcs7, sizeof(pkcs7) - 1 } static const struct certs_test certs_tests[] __initconst = { - TEST(certs_selftest_1_data, certs_selftest_1_pkcs7), + TEST(certs_selftest_data, certs_selftest_rsa_pkcs7), +#if IS_ENABLED(CONFIG_CRYPTO_ECDSA) + TEST(certs_selftest_data, certs_selftest_ecdsa_pkcs7), +#endif }; static int __init fips_signature_selftest(void) -- 2.44.0