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From:   Dimitri John Ledkov <dimitri.ledkov@canonical.com>
To:     herbert@gondor.apana.org.au,
        "David S. Miller" <davem@davemloft.net>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        Alexandre Torgue <alexandre.torgue@foss.st.com>
Cc:     linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-stm32@st-md-mailman.stormreply.com,
        linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/6] crypto: rsa-pkcs1pad - Add FIPS 202 SHA-3 support
Date:   Sun, 22 Oct 2023 19:22:05 +0100
Message-Id: <20231022182208.188714-4-dimitri.ledkov@canonical.com>
In-Reply-To: <20231022182208.188714-1-dimitri.ledkov@canonical.com>
References: <20231022182208.188714-1-dimitri.ledkov@canonical.com>
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Add support in rsa-pkcs1pad for FIPS 202 SHA-3 hashes, sizes 256 and
up. As 224 is too weak for any practical purposes.

Signed-off-by: Dimitri John Ledkov <dimitri.ledkov@canonical.com>
---
 crypto/rsa-pkcs1pad.c | 25 ++++++++++++++++++++++++-
 crypto/testmgr.c      | 12 ++++++++++++
 2 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/crypto/rsa-pkcs1pad.c b/crypto/rsa-pkcs1pad.c
index d2e5e104f8..e32e497d29 100644
--- a/crypto/rsa-pkcs1pad.c
+++ b/crypto/rsa-pkcs1pad.c
@@ -61,6 +61,24 @@ static const u8 rsa_digest_info_sha512[] = {
 	0x05, 0x00, 0x04, 0x40
 };
 
+static const u8 rsa_digest_info_sha3_256[] = {
+	0x30, 0x31, 0x30, 0x0d, 0x06, 0x09,
+	0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x08,
+	0x05, 0x00, 0x04, 0x20
+};
+
+static const u8 rsa_digest_info_sha3_384[] = {
+	0x30, 0x41, 0x30, 0x0d, 0x06, 0x09,
+	0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x09,
+	0x05, 0x00, 0x04, 0x30
+};
+
+static const u8 rsa_digest_info_sha3_512[] = {
+	0x30, 0x51, 0x30, 0x0d, 0x06, 0x09,
+	0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x0A,
+	0x05, 0x00, 0x04, 0x40
+};
+
 static const struct rsa_asn1_template {
 	const char	*name;
 	const u8	*data;
@@ -74,8 +92,13 @@ static const struct rsa_asn1_template {
 	_(sha384),
 	_(sha512),
 	_(sha224),
-	{ NULL }
 #undef _
+#define _(X) { "sha3-" #X, rsa_digest_info_sha3_##X, sizeof(rsa_digest_info_sha3_##X) }
+	_(256),
+	_(384),
+	_(512),
+#undef _
+	{ NULL }
 };
 
 static const struct rsa_asn1_template *rsa_lookup_asn1(const char *name)
diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index 54135c7610..a074430223 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -5468,6 +5468,18 @@ static const struct alg_test_desc alg_test_descs[] = {
 		.alg = "pkcs1pad(rsa,sha512)",
 		.test = alg_test_null,
 		.fips_allowed = 1,
+	}, {
+		.alg = "pkcs1pad(rsa,sha3-256)",
+		.test = alg_test_null,
+		.fips_allowed = 1,
+	}, {
+		.alg = "pkcs1pad(rsa,sha3-384)",
+		.test = alg_test_null,
+		.fips_allowed = 1,
+	}, {
+		.alg = "pkcs1pad(rsa,sha3-512)",
+		.test = alg_test_null,
+		.fips_allowed = 1,
 	}, {
 		.alg = "poly1305",
 		.test = alg_test_hash,
-- 
2.34.1